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package genopenapi
import (
"bytes"
"errors"
"fmt"
"math"
"net/textproto"
"os"
"reflect"
"regexp"
"sort"
"strconv"
"strings"
"sync"
"text/template"
"time"
"github.com/grpc-ecosystem/grpc-gateway/v2/internal/casing"
"github.com/grpc-ecosystem/grpc-gateway/v2/internal/descriptor"
openapi_options "github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2/options"
"google.golang.org/genproto/googleapis/api/annotations"
"google.golang.org/genproto/googleapis/api/visibility"
"google.golang.org/grpc/grpclog"
"google.golang.org/protobuf/encoding/protojson"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/descriptorpb"
"google.golang.org/protobuf/types/known/structpb"
)
// The OpenAPI specification does not allow for more than one endpoint with the same HTTP method and path.
// This prevents multiple gRPC service methods from sharing the same stripped version of the path and method.
// For example: `GET /v1/{name=organizations/*}/roles` and `GET /v1/{name=users/*}/roles` both get stripped to `GET /v1/{name}/roles`.
// We must make the URL unique by adding a suffix and an incrementing index to each path parameter
// to differentiate the endpoints.
// Since path parameter names do not affect the request contents (i.e. they're replaced in the path)
// this will be hidden from the real grpc gateway consumer.
const pathParamUniqueSuffixDeliminator = "_"
const paragraphDeliminator = "\n\n"
// wktSchemas are the schemas of well-known-types.
// The schemas must match with the behavior of the JSON unmarshaler in
// https://github.com/protocolbuffers/protobuf-go/blob/v1.25.0/encoding/protojson/well_known_types.go
var wktSchemas = map[string]schemaCore{
".google.protobuf.FieldMask": {
Type: "string",
},
".google.protobuf.Timestamp": {
Type: "string",
Format: "date-time",
},
".google.protobuf.Duration": {
Type: "string",
},
".google.protobuf.StringValue": {
Type: "string",
},
".google.protobuf.BytesValue": {
Type: "string",
Format: "byte",
},
".google.protobuf.Int32Value": {
Type: "integer",
Format: "int32",
},
".google.protobuf.UInt32Value": {
Type: "integer",
Format: "int64",
},
".google.protobuf.Int64Value": {
Type: "string",
Format: "int64",
},
".google.protobuf.UInt64Value": {
Type: "string",
Format: "uint64",
},
".google.protobuf.FloatValue": {
Type: "number",
Format: "float",
},
".google.protobuf.DoubleValue": {
Type: "number",
Format: "double",
},
".google.protobuf.BoolValue": {
Type: "boolean",
},
".google.protobuf.Empty": {
Type: "object",
},
".google.protobuf.Struct": {
Type: "object",
},
".google.protobuf.Value": {},
".google.protobuf.ListValue": {
Type: "array",
Items: (*openapiItemsObject)(&openapiSchemaObject{
schemaCore: schemaCore{
Type: "object",
}}),
},
".google.protobuf.NullValue": {
Type: "string",
},
}
func listEnumNames(reg *descriptor.Registry, enum *descriptor.Enum) interface{} {
var names []string
for _, value := range enum.GetValue() {
if !isVisible(getEnumValueVisibilityOption(value), reg) {
continue
}
if reg.GetOmitEnumDefaultValue() && value.GetNumber() == 0 {
continue
}
names = append(names, value.GetName())
}
if len(names) > 0 {
return names
}
return nil
}
func listEnumNumbers(reg *descriptor.Registry, enum *descriptor.Enum) interface{} {
var numbers []int
for _, value := range enum.GetValue() {
if reg.GetOmitEnumDefaultValue() && value.GetNumber() == 0 {
continue
}
if !isVisible(getEnumValueVisibilityOption(value), reg) {
continue
}
numbers = append(numbers, int(value.GetNumber()))
}
if len(numbers) > 0 {
return numbers
}
return nil
}
func getEnumDefault(reg *descriptor.Registry, enum *descriptor.Enum) interface{} {
if !reg.GetOmitEnumDefaultValue() {
for _, value := range enum.GetValue() {
if value.GetNumber() == 0 {
return value.GetName()
}
}
}
return nil
}
func getEnumDefaultNumber(reg *descriptor.Registry, enum *descriptor.Enum) interface{} {
if !reg.GetOmitEnumDefaultValue() {
for _, value := range enum.GetValue() {
if value.GetNumber() == 0 {
return int(value.GetNumber())
}
}
}
return nil
}
// messageToQueryParameters converts a message to a list of OpenAPI query parameters.
func messageToQueryParameters(message *descriptor.Message, reg *descriptor.Registry, pathParams []descriptor.Parameter, body *descriptor.Body, httpMethod string) (params []openapiParameterObject, err error) {
for _, field := range message.Fields {
// When body is set to oneof field, we want to skip other fields in the oneof group.
if isBodySameOneOf(body, field) {
continue
}
if !isVisible(getFieldVisibilityOption(field), reg) {
continue
}
if reg.GetAllowPatchFeature() && field.GetTypeName() == ".google.protobuf.FieldMask" && field.GetName() == "update_mask" && httpMethod == "PATCH" && len(body.FieldPath) != 0 {
continue
}
p, err := queryParams(message, field, "", reg, pathParams, body, reg.GetRecursiveDepth())
if err != nil {
return nil, err
}
params = append(params, p...)
}
return params, nil
}
func isBodySameOneOf(body *descriptor.Body, field *descriptor.Field) bool {
if field.OneofIndex == nil {
return false
}
if body == nil || len(body.FieldPath) == 0 {
return false
}
if body.FieldPath[0].Target.OneofIndex == nil {
return false
}
return *body.FieldPath[0].Target.OneofIndex == *field.OneofIndex
}
// queryParams converts a field to a list of OpenAPI query parameters recursively through the use of nestedQueryParams.
func queryParams(message *descriptor.Message, field *descriptor.Field, prefix string, reg *descriptor.Registry, pathParams []descriptor.Parameter, body *descriptor.Body, recursiveCount int) (params []openapiParameterObject, err error) {
return nestedQueryParams(message, field, prefix, reg, pathParams, body, newCycleChecker(recursiveCount))
}
type cycleChecker struct {
m map[string]int
count int
}
func newCycleChecker(recursive int) *cycleChecker {
return &cycleChecker{
m: make(map[string]int),
count: recursive,
}
}
// Check returns whether name is still within recursion
// toleration
func (c *cycleChecker) Check(name string) bool {
count, ok := c.m[name]
count += 1
isCycle := count > c.count
if isCycle {
return false
}
// provision map entry if not available
if !ok {
c.m[name] = 1
return true
}
c.m[name] = count
return true
}
func (c *cycleChecker) Branch() *cycleChecker {
copy := &cycleChecker{
count: c.count,
m: make(map[string]int, len(c.m)),
}
for k, v := range c.m {
copy.m[k] = v
}
return copy
}
// nestedQueryParams converts a field to a list of OpenAPI query parameters recursively.
// This function is a helper function for queryParams, that keeps track of cyclical message references
// through the use of
//
// touched map[string]int
//
// If a cycle is discovered, an error is returned, as cyclical data structures are dangerous
// in query parameters.
func nestedQueryParams(message *descriptor.Message, field *descriptor.Field, prefix string, reg *descriptor.Registry, pathParams []descriptor.Parameter, body *descriptor.Body, cycle *cycleChecker) (params []openapiParameterObject, err error) {
// make sure the parameter is not already listed as a path parameter
for _, pathParam := range pathParams {
if pathParam.Target == field {
return nil, nil
}
}
// make sure the parameter is not already listed as a body parameter
if body != nil {
if body.FieldPath == nil {
return nil, nil
}
for _, fieldPath := range body.FieldPath {
if fieldPath.Target == field {
return nil, nil
}
}
}
schema := schemaOfField(field, reg, nil)
fieldType := field.GetTypeName()
if message.File != nil {
comments := fieldProtoComments(reg, message, field)
if err := updateOpenAPIDataFromComments(reg, &schema, message, comments, false); err != nil {
return nil, err
}
}
isEnum := field.GetType() == descriptorpb.FieldDescriptorProto_TYPE_ENUM
items := schema.Items
if schema.Type != "" || isEnum {
if schema.Type == "object" {
location := ""
if ix := strings.LastIndex(field.Message.FQMN(), "."); ix > 0 {
location = field.Message.FQMN()[0:ix]
}
if m, err := reg.LookupMsg(location, field.GetTypeName()); err == nil {
if opt := m.GetOptions(); opt != nil && opt.MapEntry != nil && *opt.MapEntry {
k := m.GetField()[0]
kType, err := getMapParamKey(k.GetType())
if err != nil {
return nil, err
}
// This will generate a query in the format map_name[key_type]
fName := fmt.Sprintf("%s[%s]", *field.Name, kType)
field.Name = proto.String(fName)
schema.Type = schema.AdditionalProperties.schemaCore.Type
schema.Description = `This is a request variable of the map type. The query format is "map_name[key]=value", e.g. If the map name is Age, the key type is string, and the value type is integer, the query parameter is expressed as Age["bob"]=18`
}
}
}
if items != nil && (items.Type == "" || items.Type == "object") && !isEnum {
return nil, nil // TODO: currently, mapping object in query parameter is not supported
}
desc := mergeDescription(schema)
// verify if the field is required
required := false
for _, fieldName := range schema.Required {
if fieldName == reg.FieldName(field) {
required = true
break
}
}
// verify if the field is required in message options
if messageSchema, err := extractSchemaOptionFromMessageDescriptor(message.DescriptorProto); err == nil {
for _, fieldName := range messageSchema.GetJsonSchema().GetRequired() {
// Required fields can be field names or json_name values
if fieldName == field.GetJsonName() || fieldName == field.GetName() {
required = true
break
}
}
}
param := openapiParameterObject{
Description: desc,
In: "query",
Default: schema.Default,
Type: schema.Type,
Items: schema.Items,
Format: schema.Format,
Pattern: schema.Pattern,
Required: required,
extensions: schema.extensions,
Enum: schema.Enum,
}
if param.Type == "array" {
param.CollectionFormat = "multi"
}
param.Name = prefix + reg.FieldName(field)
if isEnum {
enum, err := reg.LookupEnum("", fieldType)
if err != nil {
return nil, fmt.Errorf("unknown enum type %s", fieldType)
}
if items != nil { // array
param.Items = &openapiItemsObject{
schemaCore: schemaCore{
Type: "string",
Enum: listEnumNames(reg, enum),
},
}
if reg.GetEnumsAsInts() {
param.Items.Type = "integer"
param.Items.Enum = listEnumNumbers(reg, enum)
}
} else {
param.Type = "string"
param.Enum = listEnumNames(reg, enum)
param.Default = getEnumDefault(reg, enum)
if reg.GetEnumsAsInts() {
param.Type = "integer"
param.Enum = listEnumNumbers(reg, enum)
param.Default = getEnumDefaultNumber(reg, enum)
}
}
valueComments := enumValueProtoComments(reg, enum)
if valueComments != "" {
param.Description = strings.TrimLeft(param.Description+"\n\n "+valueComments, "\n")
}
}
return []openapiParameterObject{param}, nil
}
// nested type, recurse
msg, err := reg.LookupMsg("", fieldType)
if err != nil {
return nil, fmt.Errorf("unknown message type %s", fieldType)
}
// Check for cyclical message reference:
if ok := cycle.Check(*msg.Name); !ok {
return nil, fmt.Errorf("exceeded recursive count (%d) for query parameter %q", cycle.count, fieldType)
}
// Construct a new map with the message name so a cycle further down the recursive path can be detected.
// Do not keep anything in the original touched reference and do not pass that reference along. This will
// prevent clobbering adjacent records while recursing.
touchedOut := cycle.Branch()
for _, nestedField := range msg.Fields {
if !isVisible(getFieldVisibilityOption(nestedField), reg) {
continue
}
fieldName := reg.FieldName(field)
p, err := nestedQueryParams(msg, nestedField, prefix+fieldName+".", reg, pathParams, body, touchedOut)
if err != nil {
return nil, err
}
params = append(params, p...)
}
return params, nil
}
func getMapParamKey(t descriptorpb.FieldDescriptorProto_Type) (string, error) {
tType, f, ok := primitiveSchema(t)
if !ok || f == "byte" || f == "float" || f == "double" {
return "", fmt.Errorf("unsupported type: %q", f)
}
return tType, nil
}
// findServicesMessagesAndEnumerations discovers all messages and enums defined in the RPC methods of the service.
func findServicesMessagesAndEnumerations(s []*descriptor.Service, reg *descriptor.Registry, m messageMap, ms messageMap, e enumMap, refs refMap) {
for _, svc := range s {
if !isVisible(getServiceVisibilityOption(svc), reg) {
continue
}
for _, meth := range svc.Methods {
// Request may be fully included in query
{
if !isVisible(getMethodVisibilityOption(meth), reg) {
continue
}
swgReqName, ok := fullyQualifiedNameToOpenAPIName(meth.RequestType.FQMN(), reg)
if !ok {
grpclog.Errorf("couldn't resolve OpenAPI name for FQMN %q", meth.RequestType.FQMN())
continue
}
if _, ok := refs[fmt.Sprintf("#/definitions/%s", swgReqName)]; ok {
if !skipRenderingRef(meth.RequestType.FQMN()) {
m[swgReqName] = meth.RequestType
}
}
}
swgRspName, ok := fullyQualifiedNameToOpenAPIName(meth.ResponseType.FQMN(), reg)
if !ok && !skipRenderingRef(meth.ResponseType.FQMN()) {
grpclog.Errorf("couldn't resolve OpenAPI name for FQMN %q", meth.ResponseType.FQMN())
continue
}
findNestedMessagesAndEnumerations(meth.RequestType, reg, m, e)
if !skipRenderingRef(meth.ResponseType.FQMN()) {
m[swgRspName] = meth.ResponseType
}
findNestedMessagesAndEnumerations(meth.ResponseType, reg, m, e)
}
}
}
// findNestedMessagesAndEnumerations those can be generated by the services.
func findNestedMessagesAndEnumerations(message *descriptor.Message, reg *descriptor.Registry, m messageMap, e enumMap) {
// Iterate over all the fields that
for _, t := range message.Fields {
if !isVisible(getFieldVisibilityOption(t), reg) {
continue
}
fieldType := t.GetTypeName()
// If the type is an empty string then it is a proto primitive
if fieldType != "" {
if _, ok := m[fieldType]; !ok {
msg, err := reg.LookupMsg("", fieldType)
if err != nil {
enum, err := reg.LookupEnum("", fieldType)
if err != nil {
panic(err)
}
e[fieldType] = enum
continue
}
m[fieldType] = msg
findNestedMessagesAndEnumerations(msg, reg, m, e)
}
}
}
}
func skipRenderingRef(refName string) bool {
_, ok := wktSchemas[refName]
return ok
}
func renderMessageAsDefinition(msg *descriptor.Message, reg *descriptor.Registry, customRefs refMap, pathParams []descriptor.Parameter) (openapiSchemaObject, error) {
schema := openapiSchemaObject{
schemaCore: schemaCore{
Type: "object",
},
}
msgComments := protoComments(reg, msg.File, msg.Outers, "MessageType", int32(msg.Index))
if err := updateOpenAPIDataFromComments(reg, &schema, msg, msgComments, false); err != nil {
return openapiSchemaObject{}, err
}
opts, err := getMessageOpenAPIOption(reg, msg)
if err != nil {
return openapiSchemaObject{}, err
}
if opts != nil {
protoSchema := openapiSchemaFromProtoSchema(opts, reg, customRefs, msg)
// Warning: Make sure not to overwrite any fields already set on the schema type.
schema.ExternalDocs = protoSchema.ExternalDocs
schema.ReadOnly = protoSchema.ReadOnly
schema.MultipleOf = protoSchema.MultipleOf
schema.Maximum = protoSchema.Maximum
schema.ExclusiveMaximum = protoSchema.ExclusiveMaximum
schema.Minimum = protoSchema.Minimum
schema.ExclusiveMinimum = protoSchema.ExclusiveMinimum
schema.MaxLength = protoSchema.MaxLength
schema.MinLength = protoSchema.MinLength
schema.Pattern = protoSchema.Pattern
schema.Default = protoSchema.Default
schema.MaxItems = protoSchema.MaxItems
schema.MinItems = protoSchema.MinItems
schema.UniqueItems = protoSchema.UniqueItems
schema.MaxProperties = protoSchema.MaxProperties
schema.MinProperties = protoSchema.MinProperties
schema.Required = protoSchema.Required
schema.XNullable = protoSchema.XNullable
schema.extensions = protoSchema.extensions
if protoSchema.schemaCore.Type != "" || protoSchema.schemaCore.Ref != "" {
schema.schemaCore = protoSchema.schemaCore
}
if protoSchema.Title != "" {
schema.Title = protoSchema.Title
}
if protoSchema.Description != "" {
schema.Description = protoSchema.Description
}
if protoSchema.Example != nil {
schema.Example = protoSchema.Example
}
}
schema.Required = filterOutExcludedFields(schema.Required, pathParams)
for _, f := range msg.Fields {
if !isVisible(getFieldVisibilityOption(f), reg) {
continue
}
if shouldExcludeField(f.GetName(), pathParams) {
continue
}
subPathParams := subPathParams(f.GetName(), pathParams)
fieldSchema, err := renderFieldAsDefinition(f, reg, customRefs, subPathParams)
if err != nil {
return openapiSchemaObject{}, err
}
comments := fieldProtoComments(reg, msg, f)
if err := updateOpenAPIDataFromComments(reg, &fieldSchema, f, comments, false); err != nil {
return openapiSchemaObject{}, err
}
if requiredIdx := find(schema.Required, *f.Name); requiredIdx != -1 && reg.GetUseJSONNamesForFields() {
schema.Required[requiredIdx] = f.GetJsonName()
}
if fieldSchema.Required != nil {
schema.Required = getUniqueFields(schema.Required, fieldSchema.Required)
schema.Required = append(schema.Required, fieldSchema.Required...)
// To avoid populating both the field schema require and message schema require, unset the field schema require.
// See issue #2635.
fieldSchema.Required = nil
}
if reg.GetUseAllOfForRefs() {
if fieldSchema.Ref != "" {
// Per the JSON Reference syntax: Any members other than "$ref" in a JSON Reference object SHALL be ignored.
// https://tools.ietf.org/html/draft-pbryan-zyp-json-ref-03#section-3
// However, use allOf to specify Title/Description/Example/readOnly fields.
if fieldSchema.Title != "" || fieldSchema.Description != "" || len(fieldSchema.Example) > 0 || fieldSchema.ReadOnly {
fieldSchema = openapiSchemaObject{
Title: fieldSchema.Title,
Description: fieldSchema.Description,
schemaCore: schemaCore{
Example: fieldSchema.Example,
},
ReadOnly: fieldSchema.ReadOnly,
AllOf: []allOfEntry{{Ref: fieldSchema.Ref}},
}
} else {
fieldSchema = openapiSchemaObject{schemaCore: schemaCore{Ref: fieldSchema.Ref}}
}
}
}
kv := keyVal{Value: fieldSchema}
kv.Key = reg.FieldName(f)
if schema.Properties == nil {
schema.Properties = &openapiSchemaObjectProperties{}
}
*schema.Properties = append(*schema.Properties, kv)
}
if msg.FQMN() == ".google.protobuf.Any" {
transformAnyForJSON(&schema, reg.GetUseJSONNamesForFields())
}
return schema, nil
}
func renderFieldAsDefinition(f *descriptor.Field, reg *descriptor.Registry, refs refMap, pathParams []descriptor.Parameter) (openapiSchemaObject, error) {
if len(pathParams) == 0 {
return schemaOfField(f, reg, refs), nil
}
location := ""
if ix := strings.LastIndex(f.Message.FQMN(), "."); ix > 0 {
location = f.Message.FQMN()[0:ix]
}
msg, err := reg.LookupMsg(location, f.GetTypeName())
if err != nil {
return openapiSchemaObject{}, err
}
schema, err := renderMessageAsDefinition(msg, reg, refs, pathParams)
if err != nil {
return openapiSchemaObject{}, err
}
comments := fieldProtoComments(reg, f.Message, f)
if len(comments) > 0 {
// Use title and description from field instead of nested message if present.
paragraphs := strings.Split(comments, paragraphDeliminator)
schema.Title = strings.TrimSpace(paragraphs[0])
schema.Description = strings.TrimSpace(strings.Join(paragraphs[1:], paragraphDeliminator))
}
return schema, nil
}
// transformAnyForJSON should be called when the schema object represents a google.protobuf.Any, and will replace the
// Properties slice with a single value for '@type'. We mutate the incorrectly named field so that we inherit the same
// documentation as specified on the original field in the protobuf descriptors.
func transformAnyForJSON(schema *openapiSchemaObject, useJSONNames bool) {
var typeFieldName string
if useJSONNames {
typeFieldName = "typeUrl"
} else {
typeFieldName = "type_url"
}
for _, property := range *schema.Properties {
if property.Key == typeFieldName {
schema.AdditionalProperties = &openapiSchemaObject{}
schema.Properties = &openapiSchemaObjectProperties{keyVal{
Key: "@type",
Value: property.Value,
}}
break
}
}
}
func renderMessagesAsDefinition(messages messageMap, d openapiDefinitionsObject, reg *descriptor.Registry, customRefs refMap, pathParams []descriptor.Parameter) error {
for name, msg := range messages {
swgName, ok := fullyQualifiedNameToOpenAPIName(msg.FQMN(), reg)
if !ok {
return fmt.Errorf("can't resolve OpenAPI name from %q", msg.FQMN())
}
if skipRenderingRef(name) {
continue
}
if opt := msg.GetOptions(); opt != nil && opt.MapEntry != nil && *opt.MapEntry {
continue
}
var err error
d[swgName], err = renderMessageAsDefinition(msg, reg, customRefs, pathParams)
if err != nil {
return err
}
}
return nil
}
// isVisible checks if a field/RPC is visible based on the visibility restriction
// combined with the `visibility_restriction_selectors`.
// Elements with an overlap on `visibility_restriction_selectors` are visible, those without are not visible.
// Elements without `google.api.VisibilityRule` annotations entirely are always visible.
func isVisible(r *visibility.VisibilityRule, reg *descriptor.Registry) bool {
if r == nil {
return true
}
restrictions := strings.Split(strings.TrimSpace(r.Restriction), ",")
// No restrictions results in the element always being visible
if len(restrictions) == 0 {
return true
}
for _, restriction := range restrictions {
if reg.GetVisibilityRestrictionSelectors()[strings.TrimSpace(restriction)] {
return true
}
}
return false
}
func shouldExcludeField(name string, excluded []descriptor.Parameter) bool {
for _, p := range excluded {
if len(p.FieldPath) == 1 && name == p.FieldPath[0].Name {
return true
}
}
return false
}
func filterOutExcludedFields(fields []string, excluded []descriptor.Parameter) []string {
var filtered []string
for _, f := range fields {
if !shouldExcludeField(f, excluded) {
filtered = append(filtered, f)
}
}
return filtered
}
// schemaOfField returns a OpenAPI Schema Object for a protobuf field.
func schemaOfField(f *descriptor.Field, reg *descriptor.Registry, refs refMap) openapiSchemaObject {
const (
singular = 0
array = 1
object = 2
)
var (
core schemaCore
aggregate int
)
fd := f.FieldDescriptorProto
location := ""
if ix := strings.LastIndex(f.Message.FQMN(), "."); ix > 0 {
location = f.Message.FQMN()[0:ix]
}
if m, err := reg.LookupMsg(location, f.GetTypeName()); err == nil {
if opt := m.GetOptions(); opt != nil && opt.MapEntry != nil && *opt.MapEntry {
fd = m.GetField()[1]
aggregate = object
}
}
if fd.GetLabel() == descriptorpb.FieldDescriptorProto_LABEL_REPEATED {
aggregate = array
}
var props *openapiSchemaObjectProperties
switch ft := fd.GetType(); ft {
case descriptorpb.FieldDescriptorProto_TYPE_ENUM, descriptorpb.FieldDescriptorProto_TYPE_MESSAGE, descriptorpb.FieldDescriptorProto_TYPE_GROUP:
if wktSchema, ok := wktSchemas[fd.GetTypeName()]; ok {
core = wktSchema
if fd.GetTypeName() == ".google.protobuf.Empty" {
props = &openapiSchemaObjectProperties{}
}
} else {
swgRef, ok := fullyQualifiedNameToOpenAPIName(fd.GetTypeName(), reg)
if !ok {
panic(fmt.Sprintf("can't resolve OpenAPI ref from typename %q", fd.GetTypeName()))
}
core = schemaCore{
Ref: "#/definitions/" + swgRef,
}
if refs != nil {
refs[fd.GetTypeName()] = struct{}{}
}
}
default:
ftype, format, ok := primitiveSchema(ft)
if ok {
core = schemaCore{Type: ftype, Format: format}
} else {
core = schemaCore{Type: ft.String(), Format: "UNKNOWN"}
}
}
ret := openapiSchemaObject{}
switch aggregate {
case array:
if _, ok := wktSchemas[fd.GetTypeName()]; !ok && fd.GetType() == descriptorpb.FieldDescriptorProto_TYPE_MESSAGE {
core.Type = "object"
}
ret = openapiSchemaObject{
schemaCore: schemaCore{
Type: "array",
Items: (*openapiItemsObject)(&openapiSchemaObject{schemaCore: core}),
},
}
case object:
ret = openapiSchemaObject{
schemaCore: schemaCore{
Type: "object",
},
AdditionalProperties: &openapiSchemaObject{Properties: props, schemaCore: core},
}
default:
ret = openapiSchemaObject{
schemaCore: core,
Properties: props,
}
}
if j, err := getFieldOpenAPIOption(reg, f); err == nil {
updateswaggerObjectFromJSONSchema(&ret, j, reg, f)
}
if j, err := getFieldBehaviorOption(reg, f); err == nil {
updateSwaggerObjectFromFieldBehavior(&ret, j, reg, f)
}
for i, required := range ret.Required {
if required == f.GetName() {
ret.Required[i] = reg.FieldName(f)
}
}
if reg.GetProto3OptionalNullable() && f.GetProto3Optional() {
ret.XNullable = true
}
return ret
}
// primitiveSchema returns a pair of "Type" and "Format" in JSON Schema for
// the given primitive field type.
// The last return parameter is true iff the field type is actually primitive.
func primitiveSchema(t descriptorpb.FieldDescriptorProto_Type) (ftype, format string, ok bool) {
switch t {
case descriptorpb.FieldDescriptorProto_TYPE_DOUBLE:
return "number", "double", true
case descriptorpb.FieldDescriptorProto_TYPE_FLOAT:
return "number", "float", true
case descriptorpb.FieldDescriptorProto_TYPE_INT64:
return "string", "int64", true
case descriptorpb.FieldDescriptorProto_TYPE_UINT64:
// 64bit integer types are marshaled as string in the default JSONPb marshaler.
// TODO(yugui) Add an option to declare 64bit integers as int64.
//
// NOTE: uint64 is not a predefined format of integer type in OpenAPI spec.
// So we cannot expect that uint64 is commonly supported by OpenAPI processor.
return "string", "uint64", true
case descriptorpb.FieldDescriptorProto_TYPE_INT32:
return "integer", "int32", true
case descriptorpb.FieldDescriptorProto_TYPE_FIXED64:
// Ditto.
return "string", "uint64", true
case descriptorpb.FieldDescriptorProto_TYPE_FIXED32:
// Ditto.
return "integer", "int64", true
case descriptorpb.FieldDescriptorProto_TYPE_BOOL:
// NOTE: in OpenAPI specification, format should be empty on boolean type
return "boolean", "", true
case descriptorpb.FieldDescriptorProto_TYPE_STRING:
// NOTE: in OpenAPI specification, can be empty on string type
// see: https://swagger.io/specification/v2/#data-types
return "string", "", true
case descriptorpb.FieldDescriptorProto_TYPE_BYTES:
return "string", "byte", true
case descriptorpb.FieldDescriptorProto_TYPE_UINT32:
// Ditto.
return "integer", "int64", true
case descriptorpb.FieldDescriptorProto_TYPE_SFIXED32:
return "integer", "int32", true
case descriptorpb.FieldDescriptorProto_TYPE_SFIXED64:
return "string", "int64", true
case descriptorpb.FieldDescriptorProto_TYPE_SINT32:
return "integer", "int32", true
case descriptorpb.FieldDescriptorProto_TYPE_SINT64:
return "string", "int64", true
default:
return "", "", false
}
}
// renderEnumerationsAsDefinition inserts enums into the definitions object.
func renderEnumerationsAsDefinition(enums enumMap, d openapiDefinitionsObject, reg *descriptor.Registry) {
for _, enum := range enums {
swgName, ok := fullyQualifiedNameToOpenAPIName(enum.FQEN(), reg)
if !ok {
panic(fmt.Sprintf("can't resolve OpenAPI name from FQEN %q", enum.FQEN()))
}
enumComments := protoComments(reg, enum.File, enum.Outers, "EnumType", int32(enum.Index))
// it may be necessary to sort the result of the GetValue function.
enumNames := listEnumNames(reg, enum)
defaultValue := getEnumDefault(reg, enum)
valueComments := enumValueProtoComments(reg, enum)
if valueComments != "" {
enumComments = strings.TrimLeft(enumComments+"\n\n "+valueComments, "\n")
}
enumSchemaObject := openapiSchemaObject{
schemaCore: schemaCore{
Type: "string",
Enum: enumNames,
Default: defaultValue,
},
}
if reg.GetEnumsAsInts() {
enumSchemaObject.Type = "integer"
enumSchemaObject.Format = "int32"
enumSchemaObject.Default = getEnumDefaultNumber(reg, enum)
enumSchemaObject.Enum = listEnumNumbers(reg, enum)
}
if err := updateOpenAPIDataFromComments(reg, &enumSchemaObject, enum, enumComments, false); err != nil {
panic(err)
}
d[swgName] = enumSchemaObject
}
}
// Take in a FQMN or FQEN and return a OpenAPI safe version of the FQMN and
// a boolean indicating if FQMN was properly resolved.
func fullyQualifiedNameToOpenAPIName(fqn string, reg *descriptor.Registry) (string, bool) {
registriesSeenMutex.Lock()
defer registriesSeenMutex.Unlock()
if mapping, present := registriesSeen[reg]; present {
ret, ok := mapping[fqn]
return ret, ok
}
mapping := resolveFullyQualifiedNameToOpenAPINames(append(reg.GetAllFQMNs(), append(reg.GetAllFQENs(), reg.GetAllFQMethNs()...)...), reg.GetOpenAPINamingStrategy())
registriesSeen[reg] = mapping
ret, ok := mapping[fqn]
return ret, ok
}
// Lookup message type by location.name and return a openapiv2-safe version
// of its FQMN.
func lookupMsgAndOpenAPIName(location, name string, reg *descriptor.Registry) (*descriptor.Message, string, error) {
msg, err := reg.LookupMsg(location, name)
if err != nil {
return nil, "", err
}
swgName, ok := fullyQualifiedNameToOpenAPIName(msg.FQMN(), reg)
if !ok {
return nil, "", fmt.Errorf("can't map OpenAPI name from FQMN %q", msg.FQMN())
}
return msg, swgName, nil
}
// registriesSeen is used to memoise calls to resolveFullyQualifiedNameToOpenAPINames so
// we don't repeat it unnecessarily, since it can take some time.
var registriesSeen = map[*descriptor.Registry]map[string]string{}
var registriesSeenMutex sync.Mutex
// Take the names of every proto message and generate a unique reference for each, according to the given strategy.
func resolveFullyQualifiedNameToOpenAPINames(messages []string, namingStrategy string) map[string]string {
strategyFn := LookupNamingStrategy(namingStrategy)
if strategyFn == nil {
return nil
}
return strategyFn(messages)
}
var canRegexp = regexp.MustCompile("{([a-zA-Z][a-zA-Z0-9_.]*)([^}]*)}")
// templateToParts will split a URL template as defined by https://github.com/googleapis/googleapis/blob/master/google/api/http.proto
// into a string slice with each part as an element of the slice for use by `partsToOpenAPIPath` and `partsToRegexpMap`.
func templateToParts(path string, reg *descriptor.Registry, fields []*descriptor.Field, msgs []*descriptor.Message) []string {
// It seems like the right thing to do here is to just use
// strings.Split(path, "/") but that breaks badly when you hit a url like
// /{my_field=prefix/*}/ and end up with 2 sections representing my_field.
// Instead do the right thing and write a small pushdown (counter) automata
// for it.
var parts []string
depth := 0
buffer := ""
jsonBuffer := ""
pathLoop:
for i, char := range path {
switch char {
case '{':
// Push on the stack
depth++
buffer += string(char)
jsonBuffer = ""
jsonBuffer += string(char)
case '}':
if depth == 0 {
panic("Encountered } without matching { before it.")
}
// Pop from the stack
depth--
buffer += string(char)
if reg.GetUseJSONNamesForFields() &&
len(jsonBuffer) > 1 {
jsonSnakeCaseName := jsonBuffer[1:]
jsonCamelCaseName := lowerCamelCase(jsonSnakeCaseName, fields, msgs)
prev := buffer[:len(buffer)-len(jsonSnakeCaseName)-2]
buffer = strings.Join([]string{prev, "{", jsonCamelCaseName, "}"}, "")
jsonBuffer = ""
}
case '/':
if depth == 0 {
parts = append(parts, buffer)
buffer = ""
// Since the stack was empty when we hit the '/' we are done with this
// section.
continue
}
buffer += string(char)
jsonBuffer += string(char)
case ':':
if depth == 0 {
// As soon as we find a ":" outside a variable,
// everything following is a verb
parts = append(parts, buffer)
buffer = path[i:]
break pathLoop
}
buffer += string(char)
jsonBuffer += string(char)
default:
buffer += string(char)
jsonBuffer += string(char)
}
}
// Now append the last element to parts
parts = append(parts, buffer)
return parts
}
// partsToOpenAPIPath converts each path part of the form /path/{string_value=strprefix/*} which is defined in
// https://github.com/googleapis/googleapis/blob/master/google/api/http.proto to the OpenAPI expected form /path/{string_value}.
// For example this would replace the path segment of "{foo=bar/*}" with "{foo}" or "prefix{bang=bash/**}" with "prefix{bang}".
// OpenAPI 2 only allows simple path parameters with the constraints on that parameter specified in the OpenAPI
// schema's "pattern" instead of in the path parameter itself.
func partsToOpenAPIPath(parts []string, overrides map[string]string) string {
for index, part := range parts {
part = canRegexp.ReplaceAllString(part, "{$1}")
if override, ok := overrides[part]; ok {
part = override
}
parts[index] = part
}
if last := len(parts) - 1; strings.HasPrefix(parts[last], ":") {
// Last item is a verb (":" LITERAL).
return strings.Join(parts[:last], "/") + parts[last]
}
return strings.Join(parts, "/")
}
// partsToRegexpMap returns a map of parameter name to ECMA 262 patterns
// which is what the "pattern" field on an OpenAPI parameter expects.
// See https://swagger.io/specification/v2/ (Parameter Object) and
// https://tools.ietf.org/html/draft-fge-json-schema-validation-00#section-5.2.3.
// The expression is generated based on expressions defined by https://github.com/googleapis/googleapis/blob/master/google/api/http.proto
// "Path Template Syntax" section which allow for a "param_name=foobar/*/bang/**" style expressions inside
// the path parameter placeholders that indicate constraints on the values of those parameters.
// This function will scan the split parts of a path template for parameters and
// outputs a map of the name of the parameter to a ECMA regular expression. See the http.proto file for descriptions
// of the supported syntax. This function will ignore any path parameters that don't contain a "=" after the
// parameter name. For supported parameters, we assume "*" represent all characters except "/" as it's
// intended to match a single path element and we assume "**" matches any character as it's intended to match multiple
// path elements.
// For example "{name=organizations/*/roles/*}" would produce the regular expression for the "name" parameter of
// "organizations/[^/]+/roles/[^/]+" or "{bar=bing/*/bang/**}" would produce the regular expression for the "bar"
// parameter of "bing/[^/]+/bang/.+".
//
// Note that OpenAPI does not actually support path parameters with "/", see https://github.com/OAI/OpenAPI-Specification/issues/892
func partsToRegexpMap(parts []string) map[string]string {
regExps := make(map[string]string)
for _, part := range parts {
if strings.Contains(part, "/") {
grpclog.Warningf("Path parameter %q contains '/', which is not supported in OpenAPI", part)
}
if submatch := canRegexp.FindStringSubmatch(part); len(submatch) > 2 {
if strings.HasPrefix(submatch[2], "=") { // this part matches the standard and should be made into a regular expression
// assume the string's characters other than "**" and "*" are literals (not necessarily a good assumption 100% of the times, but it will support most use cases)
regex := submatch[2][1:]
regex = strings.ReplaceAll(regex, "**", ".+") // ** implies any character including "/"
regex = strings.ReplaceAll(regex, "*", "[^/]+") // * implies any character except "/"
regExps[submatch[1]] = regex
}
}
}
return regExps
}
func renderServiceTags(services []*descriptor.Service, reg *descriptor.Registry) []openapiTagObject {
var tags []openapiTagObject
for _, svc := range services {
if !isVisible(getServiceVisibilityOption(svc), reg) {
continue
}
tagName := svc.GetName()
if pkg := svc.File.GetPackage(); pkg != "" && reg.IsIncludePackageInTags() {
tagName = pkg + "." + tagName
}
tag := openapiTagObject{
Name: tagName,
}
opts, err := getServiceOpenAPIOption(reg, svc)
if err != nil {
grpclog.Error(err)
return nil
}
if opts != nil {
tag.Description = opts.Description
if reg.GetUseGoTemplate() {
tag.Description = goTemplateComments(tag.Description, svc, reg)
}
if opts.ExternalDocs != nil {
tag.ExternalDocs = &openapiExternalDocumentationObject{
Description: opts.ExternalDocs.Description,
URL: opts.ExternalDocs.Url,
}
if reg.GetUseGoTemplate() {
tag.ExternalDocs.Description = goTemplateComments(opts.ExternalDocs.Description, svc, reg)
}
}
if opts.GetName() != "" {
tag.Name = opts.GetName()
}
}
tags = append(tags, tag)
}
return tags
}
func renderServices(services []*descriptor.Service, paths *openapiPathsObject, reg *descriptor.Registry, requestResponseRefs, customRefs refMap, msgs []*descriptor.Message, defs openapiDefinitionsObject) error {
// Correctness of svcIdx and methIdx depends on 'services' containing the services in the same order as the 'file.Service' array.
svcBaseIdx := 0
var lastFile *descriptor.File = nil
for svcIdx, svc := range services {
if svc.File != lastFile {
lastFile = svc.File
svcBaseIdx = svcIdx
}
if !isVisible(getServiceVisibilityOption(svc), reg) {
continue
}
for methIdx, meth := range svc.Methods {
if !isVisible(getMethodVisibilityOption(meth), reg) {
continue
}
for bIdx, b := range meth.Bindings {
operationFunc := operationForMethod(b.HTTPMethod)
// Iterate over all the OpenAPI parameters
parameters := openapiParametersObject{}
// split the path template into its parts
parts := templateToParts(b.PathTmpl.Template, reg, meth.RequestType.Fields, msgs)
// extract any constraints specified in the path placeholders into ECMA regular expressions
pathParamRegexpMap := partsToRegexpMap(parts)
// Keep track of path parameter overrides
var pathParamNames = make(map[string]string)
for _, parameter := range b.PathParams {
var paramType, paramFormat, desc, collectionFormat string
var defaultValue interface{}
var enumNames interface{}
var items *openapiItemsObject
var minItems *int
var extensions []extension
switch pt := parameter.Target.GetType(); pt {
case descriptorpb.FieldDescriptorProto_TYPE_GROUP, descriptorpb.FieldDescriptorProto_TYPE_MESSAGE:
if descriptor.IsWellKnownType(parameter.Target.GetTypeName()) {
if parameter.IsRepeated() {
return errors.New("only primitive and enum types are allowed in repeated path parameters")
}
schema := schemaOfField(parameter.Target, reg, customRefs)
paramType = schema.Type
paramFormat = schema.Format
desc = schema.Description
defaultValue = schema.Default
extensions = schema.extensions
} else {
return errors.New("only primitive and well-known types are allowed in path parameters")
}
case descriptorpb.FieldDescriptorProto_TYPE_ENUM:
enum, err := reg.LookupEnum("", parameter.Target.GetTypeName())
if err != nil {
return err
}
paramType = "string"
paramFormat = ""
enumNames = listEnumNames(reg, enum)
if reg.GetEnumsAsInts() {
paramType = "integer"
paramFormat = ""
enumNames = listEnumNumbers(reg, enum)
}
schema := schemaOfField(parameter.Target, reg, customRefs)
desc = schema.Description
defaultValue = schema.Default
extensions = schema.extensions
default:
var ok bool
paramType, paramFormat, ok = primitiveSchema(pt)
if !ok {
return fmt.Errorf("unknown field type %v", pt)
}
schema := schemaOfField(parameter.Target, reg, customRefs)
desc = schema.Description
defaultValue = schema.Default
extensions = schema.extensions
// If there is no mandatory format based on the field,
// allow it to be overridden by the user
if paramFormat == "" {
paramFormat = schema.Format
}
}
if parameter.IsRepeated() {
core := schemaCore{Type: paramType, Format: paramFormat}
if parameter.IsEnum() {
core.Enum = enumNames
enumNames = nil
}
items = (*openapiItemsObject)(&openapiSchemaObject{schemaCore: core})
paramType = "array"
paramFormat = ""
collectionFormat = reg.GetRepeatedPathParamSeparatorName()
minItems = new(int)
*minItems = 1
}
if desc == "" {
desc = fieldProtoComments(reg, parameter.Target.Message, parameter.Target)
}
parameterString := parameter.String()
if reg.GetUseJSONNamesForFields() {
parameterString = lowerCamelCase(parameterString, meth.RequestType.Fields, msgs)
}
var pattern string
if regExp, ok := pathParamRegexpMap[parameterString]; ok {
pattern = regExp
}
if fc := getFieldConfiguration(reg, parameter.Target); fc != nil {
pathParamName := fc.GetPathParamName()
if pathParamName != "" && pathParamName != parameterString {
pathParamNames["{"+parameterString+"}"] = "{" + pathParamName + "}"
parameterString, _, _ = strings.Cut(pathParamName, "=")
}
}
parameters = append(parameters, openapiParameterObject{
Name: parameterString,
Description: desc,
In: "path",
Required: true,
Default: defaultValue,
// Parameters in gRPC-Gateway can only be strings?
Type: paramType,
Format: paramFormat,
Enum: enumNames,
Items: items,
CollectionFormat: collectionFormat,
MinItems: minItems,
Pattern: pattern,
extensions: extensions,
})
}
// Now check if there is a body parameter
if b.Body != nil {
// Recursively render fields as definitions as long as they contain path parameters.
// Special case for top level body if we don't have a body field.
var schema openapiSchemaObject
desc := ""
var bodyFieldName string
schema = openapiSchemaObject{
schemaCore: schemaCore{},
}
if len(b.Body.FieldPath) == 0 {
// No field for body, use type.
bodyFieldName = "body"
wknSchemaCore, isWkn := wktSchemas[meth.RequestType.FQMN()]
if isWkn {
schema.schemaCore = wknSchemaCore
// Special workaround for Empty: it's well-known type but wknSchemas only returns schema.schemaCore; but we need to set schema.Properties which is a level higher.
if meth.RequestType.FQMN() == ".google.protobuf.Empty" {
schema.Properties = &openapiSchemaObjectProperties{}
}
} else {
messageSchema, err := renderMessageAsDefinition(meth.RequestType, reg, customRefs, b.PathParams)
if err != nil {
return err
}
if len(b.PathParams) == 0 {
if err := schema.setRefFromFQN(meth.RequestType.FQMN(), reg); err != nil {
return err
}
desc = messageSchema.Description
} else {
if meth.Name != nil {
methFQN, ok := fullyQualifiedNameToOpenAPIName(meth.FQMN(), reg)
if !ok {
panic(fmt.Errorf("failed to resolve method FQN: '%s'", meth.FQMN()))
}
defName := methFQN + "Body"
schema.Ref = fmt.Sprintf("#/definitions/%s", defName)
defs[defName] = messageSchema
} else {
schema = messageSchema
if schema.Properties == nil || len(*schema.Properties) == 0 {
grpclog.Warningf("created a body with 0 properties in the message, this might be unintended: %s", *meth.RequestType)
}
}
}
}
} else {
// Body field path is limited to one path component. From google.api.HttpRule.body:
// "NOTE: the referred field must be present at the top-level of the request message type."
// Ref: https://github.com/googleapis/googleapis/blob/b3397f5febbf21dfc69b875ddabaf76bee765058/google/api/http.proto#L350-L352
if len(b.Body.FieldPath) > 1 {
return fmt.Errorf("body of request %q is not a top level field: '%v'", meth.Service.GetName(), b.Body.FieldPath)
}
bodyField := b.Body.FieldPath[0]
if reg.GetUseJSONNamesForFields() {
bodyFieldName = lowerCamelCase(bodyField.Name, meth.RequestType.Fields, msgs)
} else {
bodyFieldName = bodyField.Name
}
// Align pathParams with body field path.
pathParams := subPathParams(bodyField.Name, b.PathParams)
var err error
schema, err = renderFieldAsDefinition(bodyField.Target, reg, customRefs, pathParams)
if err != nil {
return err
}
if schema.Title != "" {
desc = mergeDescription(schema)
} else {
desc = fieldProtoComments(reg, bodyField.Target.Message, bodyField.Target)
}
}
if meth.GetClientStreaming() {
desc += " (streaming inputs)"
}
parameters = append(parameters, openapiParameterObject{
Name: bodyFieldName,
Description: desc,
In: "body",
Required: true,
Schema: &schema,
})
}
// add the parameters to the query string
queryParams, err := messageToQueryParameters(meth.RequestType, reg, b.PathParams, b.Body, b.HTTPMethod)
if err != nil {
return err
}
parameters = append(parameters, queryParams...)
path := partsToOpenAPIPath(parts, pathParamNames)
pathItemObject, ok := getPathItemObject(*paths, path)
if !ok {
pathItemObject = openapiPathItemObject{}
} else {
// handle case where we have an existing mapping for the same path and method
existingOperationObject := operationFunc(&pathItemObject)
if existingOperationObject != nil {
var firstPathParameter *openapiParameterObject
var firstParamIndex int
for index, param := range parameters {
param := param
if param.In == "path" {
firstPathParameter = ¶m
firstParamIndex = index
break
}
}
if firstPathParameter == nil {
// Without a path parameter, there is nothing to vary to support multiple mappings of the same path/method.
// Previously this did not log an error and only overwrote the mapping, we now log the error but
// still overwrite the mapping
grpclog.Errorf("Duplicate mapping for path %s %s", b.HTTPMethod, path)
} else {
newPathCount := 0
var newPath string
var newPathElement string
// Iterate until there is not an existing operation that matches the same escaped path.
// Most of the time this will only be a single iteration, but a large API could technically have
// a pretty large amount of these if it used similar patterns for all its functions.
for existingOperationObject != nil {
newPathCount += 1
newPathElement = firstPathParameter.Name + pathParamUniqueSuffixDeliminator + strconv.Itoa(newPathCount)
newPath = strings.ReplaceAll(path, "{"+firstPathParameter.Name+"}", "{"+newPathElement+"}")
if newPathItemObject, ok := getPathItemObject(*paths, newPath); ok {
existingOperationObject = operationFunc(&newPathItemObject)
} else {
existingOperationObject = nil
}
}
// update the pathItemObject we are adding to with the new path
pathItemObject, _ = getPathItemObject(*paths, newPath)
firstPathParameter.Name = newPathElement
path = newPath
parameters[firstParamIndex] = *firstPathParameter
}
}
}
methProtoPath := protoPathIndex(reflect.TypeOf((*descriptorpb.ServiceDescriptorProto)(nil)), "Method")
desc := "A successful response."
var responseSchema openapiSchemaObject
if b.ResponseBody == nil || len(b.ResponseBody.FieldPath) == 0 {
responseSchema = openapiSchemaObject{
schemaCore: schemaCore{},
}
// Don't link to a full definition for
// empty; it's overly verbose.
// schema.Properties{} renders it as
// well, without a definition
wknSchemaCore, isWkn := wktSchemas[meth.ResponseType.FQMN()]
if !isWkn {
if err := responseSchema.setRefFromFQN(meth.ResponseType.FQMN(), reg); err != nil {
return err
}
} else {
responseSchema.schemaCore = wknSchemaCore
// Special workaround for Empty: it's well-known type but wknSchemas only returns schema.schemaCore; but we need to set schema.Properties which is a level higher.
if meth.ResponseType.FQMN() == ".google.protobuf.Empty" {
responseSchema.Properties = &openapiSchemaObjectProperties{}
}
}
} else {
// This is resolving the value of response_body in the google.api.HttpRule
lastField := b.ResponseBody.FieldPath[len(b.ResponseBody.FieldPath)-1]
responseSchema = schemaOfField(lastField.Target, reg, customRefs)
if responseSchema.Description != "" {
desc = responseSchema.Description
} else {
desc = fieldProtoComments(reg, lastField.Target.Message, lastField.Target)
}
}
if meth.GetServerStreaming() {
desc += "(streaming responses)"
responseSchema.Type = "object"
swgRef, _ := fullyQualifiedNameToOpenAPIName(meth.ResponseType.FQMN(), reg)
responseSchema.Title = "Stream result of " + swgRef
props := openapiSchemaObjectProperties{
keyVal{
Key: "result",
Value: openapiSchemaObject{
schemaCore: schemaCore{
Ref: responseSchema.Ref,
},
},
},
}
if !reg.GetDisableDefaultErrors() {
statusDef, hasStatus := fullyQualifiedNameToOpenAPIName(".google.rpc.Status", reg)
if hasStatus {
props = append(props, keyVal{
Key: "error",
Value: openapiSchemaObject{
schemaCore: schemaCore{
Ref: fmt.Sprintf("#/definitions/%s", statusDef)},
},
})
}
}
// Special case HttpBody responses, they will be unformatted bytes
if meth.ResponseType.FQMN() == ".google.api.HttpBody" {
responseSchema.Type = "string"
responseSchema.Format = "binary"
responseSchema.Title = "Free form byte stream"
// The error response is still JSON, but technically the full response
// is still unformatted, so don't include the error response structure.
props = nil
}
responseSchema.Properties = &props
responseSchema.Ref = ""
}
operationObject := &openapiOperationObject{
Parameters: parameters,
Responses: openapiResponsesObject{},
}
if !reg.GetDisableDefaultResponses() {
operationObject.Responses["200"] = openapiResponseObject{
Description: desc,
Schema: responseSchema,
Headers: openapiHeadersObject{},
}
}
if !reg.GetDisableServiceTags() {
tag := svc.GetName()
if pkg := svc.File.GetPackage(); pkg != "" && reg.IsIncludePackageInTags() {
tag = pkg + "." + tag
}
operationObject.Tags = []string{tag}
}
if !reg.GetDisableDefaultErrors() {
errDef, hasErrDef := fullyQualifiedNameToOpenAPIName(".google.rpc.Status", reg)
if hasErrDef {
// https://github.com/OAI/OpenAPI-Specification/blob/3.0.0/versions/2.0.md#responses-object
operationObject.Responses["default"] = openapiResponseObject{
Description: "An unexpected error response.",
Schema: openapiSchemaObject{
schemaCore: schemaCore{
Ref: fmt.Sprintf("#/definitions/%s", errDef),
},
},
}
}
}
operationObject.OperationID = fmt.Sprintf("%s_%s", svc.GetName(), meth.GetName())
if reg.GetSimpleOperationIDs() {
operationObject.OperationID = meth.GetName()
}
if bIdx != 0 {
// OperationID must be unique in an OpenAPI v2 definition.
operationObject.OperationID += strconv.Itoa(bIdx + 1)
}
// Fill reference map with referenced request messages
for _, param := range operationObject.Parameters {
if param.Schema != nil && param.Schema.Ref != "" {
requestResponseRefs[param.Schema.Ref] = struct{}{}
}
}
methComments := protoComments(reg, svc.File, nil, "Service", int32(svcIdx-svcBaseIdx), methProtoPath, int32(methIdx))
if err := updateOpenAPIDataFromComments(reg, operationObject, meth, methComments, false); err != nil {
panic(err)
}
svcOpts, err := getServiceOpenAPIOption(reg, svc)
if err != nil {
grpclog.Error(err)
return err
}
opts, err := getMethodOpenAPIOption(reg, meth)
if opts != nil {
if err != nil {
panic(err)
}
operationObject.ExternalDocs = protoExternalDocumentationToOpenAPIExternalDocumentation(opts.ExternalDocs, reg, meth)
// TODO(ivucica): this would be better supported by looking whether the method is deprecated in the proto file
operationObject.Deprecated = opts.Deprecated
if opts.Summary != "" {
operationObject.Summary = opts.Summary
}
if opts.Description != "" {
operationObject.Description = opts.Description
}
if len(opts.Tags) > 0 {
operationObject.Tags = make([]string, len(opts.Tags))
copy(operationObject.Tags, opts.Tags)
} else if svcOpts.GetName() != "" {
operationObject.Tags = []string{svcOpts.GetName()}
}
if opts.OperationId != "" {
operationObject.OperationID = opts.OperationId
}
if opts.Security != nil {
newSecurity := []openapiSecurityRequirementObject{}
if operationObject.Security != nil {
newSecurity = *operationObject.Security
}
for _, secReq := range opts.Security {
newSecReq := openapiSecurityRequirementObject{}
for secReqKey, secReqValue := range secReq.SecurityRequirement {
if secReqValue == nil {
continue
}
newSecReqValue := make([]string, len(secReqValue.Scope))
copy(newSecReqValue, secReqValue.Scope)
newSecReq[secReqKey] = newSecReqValue
}
if len(newSecReq) > 0 {
newSecurity = append(newSecurity, newSecReq)
}
}
operationObject.Security = &newSecurity
}
if opts.Responses != nil {
for name, resp := range opts.Responses {
// Merge response data into default response if available.
respObj := operationObject.Responses[name]
if resp.Description != "" {
respObj.Description = resp.Description
}
if resp.Schema != nil {
respObj.Schema = openapiSchemaFromProtoSchema(resp.Schema, reg, customRefs, meth)
}
if resp.Examples != nil {
respObj.Examples = openapiExamplesFromProtoExamples(resp.Examples)
}
if resp.Headers != nil {
hdrs, err := processHeaders(resp.Headers)
if err != nil {
return err
}
respObj.Headers = hdrs
}
if resp.Extensions != nil {
exts, err := processExtensions(resp.Extensions)
if err != nil {
return err
}
respObj.extensions = exts
}
operationObject.Responses[name] = respObj
}
}
if opts.Extensions != nil {
exts, err := processExtensions(opts.Extensions)
if err != nil {
return err
}
operationObject.extensions = exts
}
if len(opts.Consumes) > 0 {
operationObject.Consumes = make([]string, len(opts.Consumes))
copy(operationObject.Consumes, opts.Consumes)
}
if len(opts.Produces) > 0 {
operationObject.Produces = make([]string, len(opts.Produces))
copy(operationObject.Produces, opts.Produces)
}
if params := opts.Parameters; params != nil && len(params.Headers) > 0 {
for _, header := range params.Headers {
param := openapiParameterObject{
In: "header",
Name: header.Name,
Description: header.Description,
Required: header.Required,
Format: header.Format,
}
switch header.Type {
case openapi_options.HeaderParameter_STRING:
param.Type = "string"
case openapi_options.HeaderParameter_NUMBER:
param.Type = "number"
case openapi_options.HeaderParameter_INTEGER:
param.Type = "integer"
case openapi_options.HeaderParameter_BOOLEAN:
param.Type = "boolean"
default:
return fmt.Errorf("invalid header parameter type: %+v", header.Type)
}
operationObject.Parameters = append(operationObject.Parameters, param)
}
}
// TODO(ivucica): add remaining fields of operation object
}
switch b.HTTPMethod {
case "DELETE":
pathItemObject.Delete = operationObject
case "GET":
pathItemObject.Get = operationObject
case "POST":
pathItemObject.Post = operationObject
case "PUT":
pathItemObject.Put = operationObject
case "PATCH":
pathItemObject.Patch = operationObject
case "HEAD":
pathItemObject.Head = operationObject
case "OPTIONS":
pathItemObject.Options = operationObject
}
updatePaths(paths, path, pathItemObject)
}
}
}
// Success! return nil on the error object
return nil
}
// Returns the openapiPathItemObject associated with a path. If path is not present, returns
// empty openapiPathItemObject and false.
func getPathItemObject(paths openapiPathsObject, path string) (openapiPathItemObject, bool) {
for _, pathData := range paths {
if pathData.Path == path {
return pathData.PathItemObject, true
}
}
return openapiPathItemObject{}, false
}
// If a path already exists in openapiPathsObject, updates that path's openapiPathItemObject. If not,
// appends a new path and openapiPathItemObject to the openapiPathsObject.
func updatePaths(paths *openapiPathsObject, path string, pathItemObject openapiPathItemObject) {
for i, p := range *paths {
if p.Path == path {
(*paths)[i].PathItemObject = pathItemObject
return
}
}
*paths = append(*paths, pathData{
Path: path,
PathItemObject: pathItemObject,
})
}
func mergeDescription(schema openapiSchemaObject) string {
desc := schema.Description
if schema.Title != "" { // join title because title of parameter object will be ignored
desc = strings.TrimSpace(schema.Title + paragraphDeliminator + schema.Description)
}
return desc
}
func operationForMethod(httpMethod string) func(*openapiPathItemObject) *openapiOperationObject {
switch httpMethod {
case "GET":
return func(obj *openapiPathItemObject) *openapiOperationObject { return obj.Get }
case "POST":
return func(obj *openapiPathItemObject) *openapiOperationObject { return obj.Post }
case "PUT":
return func(obj *openapiPathItemObject) *openapiOperationObject { return obj.Put }
case "DELETE":
return func(obj *openapiPathItemObject) *openapiOperationObject { return obj.Delete }
case "PATCH":
return func(obj *openapiPathItemObject) *openapiOperationObject { return obj.Patch }
case "HEAD":
return func(obj *openapiPathItemObject) *openapiOperationObject { return obj.Head }
case "OPTIONS":
return func(obj *openapiPathItemObject) *openapiOperationObject { return obj.Options }
default:
return func(obj *openapiPathItemObject) *openapiOperationObject { return nil }
}
}
// This function is called with a param which contains the entire definition of a method.
func applyTemplate(p param) (*openapiSwaggerObject, error) {
// Create the basic template object. This is the object that everything is
// defined off of.
s := openapiSwaggerObject{
// OpenAPI 2.0 is the version of this document
Swagger: "2.0",
Consumes: []string{"application/json"},
Produces: []string{"application/json"},
Paths: openapiPathsObject{},
Definitions: make(openapiDefinitionsObject),
Info: openapiInfoObject{
Title: *p.File.Name,
Version: "version not set",
},
}
// Loops through all the services and their exposed GET/POST/PUT/DELETE definitions
// and create entries for all of them.
// Also adds custom user specified references to second map.
requestResponseRefs, customRefs := refMap{}, refMap{}
if err := renderServices(p.Services, &s.Paths, p.reg, requestResponseRefs, customRefs, p.Messages, s.Definitions); err != nil {
panic(err)
}
messages := messageMap{}
streamingMessages := messageMap{}
enums := enumMap{}
if !p.reg.GetDisableDefaultErrors() {
// Add the error type to the message map
runtimeError, swgRef, err := lookupMsgAndOpenAPIName("google.rpc", "Status", p.reg)
if err == nil {
messages[swgRef] = runtimeError
} else {
// just in case there is an error looking up runtimeError
grpclog.Error(err)
}
}
// Find all the service's messages and enumerations that are defined (recursively)
// and write request, response and other custom (but referenced) types out as definition objects.
findServicesMessagesAndEnumerations(p.Services, p.reg, messages, streamingMessages, enums, requestResponseRefs)
if err := renderMessagesAsDefinition(messages, s.Definitions, p.reg, customRefs, nil); err != nil {
return nil, err
}
renderEnumerationsAsDefinition(enums, s.Definitions, p.reg)
// File itself might have some comments and metadata.
packageProtoPath := protoPathIndex(reflect.TypeOf((*descriptorpb.FileDescriptorProto)(nil)), "Package")
packageComments := protoComments(p.reg, p.File, nil, "Package", packageProtoPath)
if err := updateOpenAPIDataFromComments(p.reg, &s, p, packageComments, true); err != nil {
return nil, err
}
// There may be additional options in the OpenAPI option in the proto.
spb, err := getFileOpenAPIOption(p.reg, p.File)
if err != nil {
return nil, err
}
if spb != nil {
if spb.Swagger != "" {
s.Swagger = spb.Swagger
}
if spb.Info != nil {
if spb.Info.Title != "" {
s.Info.Title = spb.Info.Title
}
if spb.Info.Description != "" {
s.Info.Description = spb.Info.Description
}
if spb.Info.TermsOfService != "" {
s.Info.TermsOfService = spb.Info.TermsOfService
}
if spb.Info.Version != "" {
s.Info.Version = spb.Info.Version
}
if spb.Info.Contact != nil {
if s.Info.Contact == nil {
s.Info.Contact = &openapiContactObject{}
}
if spb.Info.Contact.Name != "" {
s.Info.Contact.Name = spb.Info.Contact.Name
}
if spb.Info.Contact.Url != "" {
s.Info.Contact.URL = spb.Info.Contact.Url
}
if spb.Info.Contact.Email != "" {
s.Info.Contact.Email = spb.Info.Contact.Email
}
}
if spb.Info.License != nil {
if s.Info.License == nil {
s.Info.License = &openapiLicenseObject{}
}
if spb.Info.License.Name != "" {
s.Info.License.Name = spb.Info.License.Name
}
if spb.Info.License.Url != "" {
s.Info.License.URL = spb.Info.License.Url
}
}
if spb.Info.Extensions != nil {
exts, err := processExtensions(spb.Info.Extensions)
if err != nil {
return nil, err
}
s.Info.extensions = exts
}
}
if spb.Host != "" {
s.Host = spb.Host
}
if spb.BasePath != "" {
s.BasePath = spb.BasePath
}
if len(spb.Schemes) > 0 {
s.Schemes = make([]string, len(spb.Schemes))
for i, scheme := range spb.Schemes {
s.Schemes[i] = strings.ToLower(scheme.String())
}
}
if len(spb.Consumes) > 0 {
s.Consumes = make([]string, len(spb.Consumes))
copy(s.Consumes, spb.Consumes)
}
if len(spb.Produces) > 0 {
s.Produces = make([]string, len(spb.Produces))
copy(s.Produces, spb.Produces)
}
if spb.SecurityDefinitions != nil && spb.SecurityDefinitions.Security != nil {
if s.SecurityDefinitions == nil {
s.SecurityDefinitions = openapiSecurityDefinitionsObject{}
}
for secDefKey, secDefValue := range spb.SecurityDefinitions.Security {
var newSecDefValue openapiSecuritySchemeObject
if oldSecDefValue, ok := s.SecurityDefinitions[secDefKey]; !ok {
newSecDefValue = openapiSecuritySchemeObject{}
} else {
newSecDefValue = oldSecDefValue
}
if secDefValue.Type != openapi_options.SecurityScheme_TYPE_INVALID {
switch secDefValue.Type {
case openapi_options.SecurityScheme_TYPE_BASIC:
newSecDefValue.Type = "basic"
case openapi_options.SecurityScheme_TYPE_API_KEY:
newSecDefValue.Type = "apiKey"
case openapi_options.SecurityScheme_TYPE_OAUTH2:
newSecDefValue.Type = "oauth2"
}
}
if secDefValue.Description != "" {
newSecDefValue.Description = secDefValue.Description
}
if secDefValue.Name != "" {
newSecDefValue.Name = secDefValue.Name
}
if secDefValue.In != openapi_options.SecurityScheme_IN_INVALID {
switch secDefValue.In {
case openapi_options.SecurityScheme_IN_QUERY:
newSecDefValue.In = "query"
case openapi_options.SecurityScheme_IN_HEADER:
newSecDefValue.In = "header"
}
}
if secDefValue.Flow != openapi_options.SecurityScheme_FLOW_INVALID {
switch secDefValue.Flow {
case openapi_options.SecurityScheme_FLOW_IMPLICIT:
newSecDefValue.Flow = "implicit"
case openapi_options.SecurityScheme_FLOW_PASSWORD:
newSecDefValue.Flow = "password"
case openapi_options.SecurityScheme_FLOW_APPLICATION:
newSecDefValue.Flow = "application"
case openapi_options.SecurityScheme_FLOW_ACCESS_CODE:
newSecDefValue.Flow = "accessCode"
}
}
if secDefValue.AuthorizationUrl != "" {
newSecDefValue.AuthorizationURL = secDefValue.AuthorizationUrl
}
if secDefValue.TokenUrl != "" {
newSecDefValue.TokenURL = secDefValue.TokenUrl
}
if secDefValue.Scopes != nil {
if newSecDefValue.Scopes == nil {
newSecDefValue.Scopes = openapiScopesObject{}
}
for scopeKey, scopeDesc := range secDefValue.Scopes.Scope {
newSecDefValue.Scopes[scopeKey] = scopeDesc
}
}
if secDefValue.Extensions != nil {
exts, err := processExtensions(secDefValue.Extensions)
if err != nil {
return nil, err
}
newSecDefValue.extensions = exts
}
s.SecurityDefinitions[secDefKey] = newSecDefValue
}
}
if spb.Security != nil {
var newSecurity []openapiSecurityRequirementObject
if s.Security != nil {
newSecurity = s.Security
}
for _, secReq := range spb.Security {
newSecReq := openapiSecurityRequirementObject{}
for secReqKey, secReqValue := range secReq.SecurityRequirement {
if secReqValue == nil {
return nil, fmt.Errorf("malformed security requirement spec for key %q; value is required", secReqKey)
}
newSecReqValue := make([]string, len(secReqValue.Scope))
copy(newSecReqValue, secReqValue.Scope)
newSecReq[secReqKey] = newSecReqValue
}
newSecurity = append(newSecurity, newSecReq)
}
s.Security = newSecurity
}
s.ExternalDocs = protoExternalDocumentationToOpenAPIExternalDocumentation(spb.ExternalDocs, p.reg, spb)
// Populate all Paths with Responses set at top level,
// preferring Responses already set over those at the top level.
if spb.Responses != nil {
for _, verbs := range s.Paths {
var maps []openapiResponsesObject
if verbs.PathItemObject.Delete != nil {
maps = append(maps, verbs.PathItemObject.Delete.Responses)
}
if verbs.PathItemObject.Get != nil {
maps = append(maps, verbs.PathItemObject.Get.Responses)
}
if verbs.PathItemObject.Post != nil {
maps = append(maps, verbs.PathItemObject.Post.Responses)
}
if verbs.PathItemObject.Put != nil {
maps = append(maps, verbs.PathItemObject.Put.Responses)
}
if verbs.PathItemObject.Patch != nil {
maps = append(maps, verbs.PathItemObject.Patch.Responses)
}
for k, v := range spb.Responses {
for _, respMap := range maps {
if _, ok := respMap[k]; ok {
// Don't overwrite already existing Responses
continue
}
respMap[k] = openapiResponseObject{
Description: v.Description,
Schema: openapiSchemaFromProtoSchema(v.Schema, p.reg, customRefs, nil),
Examples: openapiExamplesFromProtoExamples(v.Examples),
}
}
}
}
}
if spb.Extensions != nil {
exts, err := processExtensions(spb.Extensions)
if err != nil {
return nil, err
}
s.extensions = exts
}
if spb.Tags != nil {
for _, v := range spb.Tags {
newTag := openapiTagObject{}
newTag.Name = v.Name
newTag.Description = v.Description
if p.reg.GetUseGoTemplate() {
newTag.Description = goTemplateComments(newTag.Description, nil, p.reg)
}
if v.ExternalDocs != nil {
newTag.ExternalDocs = &openapiExternalDocumentationObject{
Description: v.ExternalDocs.Description,
URL: v.ExternalDocs.Url,
}
if p.reg.GetUseGoTemplate() {
newTag.ExternalDocs.Description = goTemplateComments(v.ExternalDocs.Description, nil, p.reg)
}
}
if v.Extensions != nil {
exts, err := processExtensions(v.Extensions)
if err != nil {
return nil, err
}
newTag.extensions = exts
}
s.Tags = append(s.Tags, newTag)
}
}
// Additional fields on the OpenAPI v2 spec's "OpenAPI" object
// should be added here, once supported in the proto.
}
if !p.reg.GetDisableServiceTags() {
s.Tags = mergeTags(s.Tags, renderServiceTags(p.Services, p.reg))
}
// Finally add any references added by users that aren't
// otherwise rendered.
if err := addCustomRefs(s.Definitions, p.reg, customRefs); err != nil {
return nil, err
}
return &s, nil
}
func mergeTags(existingTags []openapiTagObject, tags []openapiTagObject) []openapiTagObject {
for _, tag := range tags {
matched := false
for i, existingTag := range existingTags {
if existingTag.Name == tag.Name {
if existingTag.Description == "" {
existingTags[i].Description = tag.Description
}
if existingTag.ExternalDocs == nil {
existingTags[i].ExternalDocs = tag.ExternalDocs
} else if tag.ExternalDocs != nil {
if existingTag.ExternalDocs.Description == "" {
existingTags[i].ExternalDocs.Description = tag.ExternalDocs.Description
}
if existingTag.ExternalDocs.URL == "" {
existingTags[i].ExternalDocs.URL = tag.ExternalDocs.URL
}
}
if existingTag.extensions == nil {
existingTags[i].extensions = tag.extensions
} else if tag.extensions != nil {
for _, ext := range tag.extensions {
matchedExt := false
for _, existingExt := range existingTag.extensions {
if existingExt.key == ext.key {
matchedExt = true
break
}
}
if !matchedExt {
existingTags[i].extensions = append(existingTags[i].extensions, ext)
}
}
}
matched = true
break
}
}
if !matched {
existingTags = append(existingTags, tag)
}
}
return existingTags
}
func processExtensions(inputExts map[string]*structpb.Value) ([]extension, error) {
exts := make([]extension, 0, len(inputExts))
for k, v := range inputExts {
if !strings.HasPrefix(k, "x-") {
return nil, fmt.Errorf("extension keys need to start with \"x-\": %q", k)
}
ext, err := (&protojson.MarshalOptions{Indent: " "}).Marshal(v)
if err != nil {
return nil, err
}
exts = append(exts, extension{key: k, value: ext})
}
sort.Slice(exts, func(i, j int) bool { return exts[i].key < exts[j].key })
return exts, nil
}
func validateHeaderTypeAndFormat(headerType, format string) error {
// The type of the object. The value MUST be one of "string", "number", "integer", "boolean", or "array"
// See: https://github.com/OAI/OpenAPI-Specification/blob/3.0.0/versions/2.0.md#headerObject
// Note: currently not implementing array as we are only implementing this in the operation response context
switch headerType {
// the format property is an open string-valued property, and can have any value to support documentation needs
// primary check for format is to ensure that the number/integer formats are extensions of the specified type
// See: https://github.com/OAI/OpenAPI-Specification/blob/3.0.0/versions/2.0.md#dataTypeFormat
case "string":
return nil
case "number":
switch format {
case "uint",
"uint8",
"uint16",
"uint32",
"uint64",
"int",
"int8",
"int16",
"int32",
"int64",
"float",
"float32",
"float64",
"complex64",
"complex128",
"double",
"byte",
"rune",
"uintptr",
"":
return nil
default:
return fmt.Errorf("the provided format %q is not a valid extension of the type %q", format, headerType)
}
case "integer":
switch format {
case "uint",
"uint8",
"uint16",
"uint32",
"uint64",
"int",
"int8",
"int16",
"int32",
"int64",
"":
return nil
default:
return fmt.Errorf("the provided format %q is not a valid extension of the type %q", format, headerType)
}
case "boolean":
return nil
}
return fmt.Errorf("the provided header type %q is not supported", headerType)
}
func validateDefaultValueTypeAndFormat(headerType string, defaultValue string, format string) error {
switch headerType {
case "string":
if !isQuotedString(defaultValue) {
return fmt.Errorf("the provided default value %q does not match provider type %q, or is not properly quoted with escaped quotations", defaultValue, headerType)
}
switch format {
case "date-time":
unquoteTime := strings.Trim(defaultValue, `"`)
if _, err := time.Parse(time.RFC3339, unquoteTime); err != nil {
return fmt.Errorf("the provided default value %q is not a valid RFC3339 date-time string", defaultValue)
}
case "date":
const layoutRFC3339Date = "2006-01-02"
unquoteDate := strings.Trim(defaultValue, `"`)
if _, err := time.Parse(layoutRFC3339Date, unquoteDate); err != nil {
return fmt.Errorf("the provided default value %q is not a valid RFC3339 date-time string", defaultValue)
}
}
case "number":
if err := isJSONNumber(defaultValue, headerType); err != nil {
return err
}
case "integer":
switch format {
case "int32":
if _, err := strconv.ParseInt(defaultValue, 0, 32); err != nil {
return fmt.Errorf("the provided default value %q does not match provided format %q", defaultValue, format)
}
case "uint32":
if _, err := strconv.ParseUint(defaultValue, 0, 32); err != nil {
return fmt.Errorf("the provided default value %q does not match provided format %q", defaultValue, format)
}
case "int64":
if _, err := strconv.ParseInt(defaultValue, 0, 64); err != nil {
return fmt.Errorf("the provided default value %q does not match provided format %q", defaultValue, format)
}
case "uint64":
if _, err := strconv.ParseUint(defaultValue, 0, 64); err != nil {
return fmt.Errorf("the provided default value %q does not match provided format %q", defaultValue, format)
}
default:
if _, err := strconv.ParseInt(defaultValue, 0, 64); err != nil {
return fmt.Errorf("the provided default value %q does not match provided type %q", defaultValue, headerType)
}
}
case "boolean":
if !isBool(defaultValue) {
return fmt.Errorf("the provided default value %q does not match provider type %q", defaultValue, headerType)
}
}
return nil
}
func isQuotedString(s string) bool {
return len(s) >= 2 && s[0] == '"' && s[len(s)-1] == '"'
}
func isJSONNumber(s string, t string) error {
val, err := strconv.ParseFloat(s, 64)
if err != nil {
return fmt.Errorf("the provided default value %q does not match provider type %q", s, t)
}
// Floating point values that cannot be represented as sequences of digits (such as Infinity and NaN) are not permitted.
// See: https://tools.ietf.org/html/rfc4627#section-2.4
if math.IsInf(val, 0) || math.IsNaN(val) {
return fmt.Errorf("the provided number %q is not a valid JSON number", s)
}
return nil
}
func isBool(s string) bool {
// Unable to use strconv.ParseBool because it returns truthy values https://golang.org/pkg/strconv/#example_ParseBool
// per https://swagger.io/specification/v2/#data-types
// type: boolean represents two values: true and false. Note that truthy and falsy values such as "true", "", 0 or null are not considered boolean values.
return s == "true" || s == "false"
}
func processHeaders(inputHdrs map[string]*openapi_options.Header) (openapiHeadersObject, error) {
hdrs := make(map[string]openapiHeaderObject, len(inputHdrs))
for k, v := range inputHdrs {
header := textproto.CanonicalMIMEHeaderKey(k)
ret := openapiHeaderObject{
Description: v.Description,
Format: v.Format,
Pattern: v.Pattern,
}
if err := validateHeaderTypeAndFormat(v.Type, v.Format); err != nil {
return nil, err
}
ret.Type = v.Type
if v.Default != "" {
if err := validateDefaultValueTypeAndFormat(v.Type, v.Default, v.Format); err != nil {
return nil, err
}
ret.Default = RawExample(v.Default)
}
hdrs[header] = ret
}
return hdrs, nil
}
func removeInternalComments(comment string) string {
c := []string{}
for len(comment) > 0 {
open := strings.SplitN(comment, "(--", 2)
if len(open) == 1 {
c = append(c, open[0])
break
}
ex := strings.TrimRight(open[0], " \t")
// Trim only one line prior to all spaces
switch {
case strings.HasSuffix(ex, "\r\n"):
ex = strings.TrimSuffix(ex, "\r\n")
case strings.HasSuffix(ex, "\n"):
ex = strings.TrimSuffix(ex, "\n")
}
if ex != "" {
c = append(c, ex)
}
comment = open[1]
close := strings.SplitN(comment, "--)", 2)
if len(close) > 1 {
comment = close[1]
} else {
break
}
}
return strings.Join(c, "")
}
// updateOpenAPIDataFromComments updates a OpenAPI object based on a comment
// from the proto file.
//
// First paragraph of a comment is used for summary. Remaining paragraphs of
// a comment are used for description. If 'Summary' field is not present on
// the passed swaggerObject, the summary and description are joined by \n\n.
//
// If there is a field named 'Info', its 'Summary' and 'Description' fields
// will be updated instead.
//
// If there is no 'Summary', the same behavior will be attempted on 'Title',
// but only if the last character is not a period.
func updateOpenAPIDataFromComments(reg *descriptor.Registry, swaggerObject interface{}, data interface{}, comment string, isPackageObject bool) error {
if len(comment) == 0 {
return nil
}
// Checks whether the "ignore_comments" flag is set to true
if reg.GetIgnoreComments() {
return nil
}
// Checks whether the "remove_internal_comments" flag is set to true
if reg.GetRemoveInternalComments() {
comment = removeInternalComments(comment)
}
// Checks whether the "use_go_templates" flag is set to true
if reg.GetUseGoTemplate() {
comment = goTemplateComments(comment, data, reg)
}
// Figure out what to apply changes to.
swaggerObjectValue := reflect.ValueOf(swaggerObject)
infoObjectValue := swaggerObjectValue.Elem().FieldByName("Info")
if !infoObjectValue.CanSet() {
// No such field? Apply summary and description directly to
// passed object.
infoObjectValue = swaggerObjectValue.Elem()
}
// Figure out which properties to update.
summaryValue := infoObjectValue.FieldByName("Summary")
descriptionValue := infoObjectValue.FieldByName("Description")
readOnlyValue := infoObjectValue.FieldByName("ReadOnly")
if readOnlyValue.Kind() == reflect.Bool && readOnlyValue.CanSet() && strings.Contains(comment, "Output only.") {
readOnlyValue.Set(reflect.ValueOf(true))
}
usingTitle := false
if !summaryValue.CanSet() {
summaryValue = infoObjectValue.FieldByName("Title")
usingTitle = true
}
paragraphs := strings.Split(comment, paragraphDeliminator)
// If there is a summary (or summary-equivalent) and it's empty, use the first
// paragraph as summary, and the rest as description.
if summaryValue.CanSet() {
summary := strings.TrimSpace(paragraphs[0])
description := strings.TrimSpace(strings.Join(paragraphs[1:], paragraphDeliminator))
if !usingTitle || (len(summary) > 0 && summary[len(summary)-1] != '.') {
// overrides the schema value only if it's empty
// keep the comment precedence when updating the package definition
if summaryValue.Len() == 0 || isPackageObject {
summaryValue.Set(reflect.ValueOf(summary))
}
if len(description) > 0 {
if !descriptionValue.CanSet() {
return errors.New("encountered object type with a summary, but no description")
}
// overrides the schema value only if it's empty
// keep the comment precedence when updating the package definition
if descriptionValue.Len() == 0 || isPackageObject {
descriptionValue.Set(reflect.ValueOf(description))
}
}
return nil
}
}
// There was no summary field on the swaggerObject. Try to apply the
// whole comment into description if the OpenAPI object description is empty.
if descriptionValue.CanSet() {
if descriptionValue.Len() == 0 || isPackageObject {
descriptionValue.Set(reflect.ValueOf(strings.Join(paragraphs, paragraphDeliminator)))
}
return nil
}
return errors.New("no description nor summary property")
}
func fieldProtoComments(reg *descriptor.Registry, msg *descriptor.Message, field *descriptor.Field) string {
protoPath := protoPathIndex(reflect.TypeOf((*descriptorpb.DescriptorProto)(nil)), "Field")
for i, f := range msg.Fields {
if f == field {
return protoComments(reg, msg.File, msg.Outers, "MessageType", int32(msg.Index), protoPath, int32(i))
}
}
return ""
}
func enumValueProtoComments(reg *descriptor.Registry, enum *descriptor.Enum) string {
protoPath := protoPathIndex(reflect.TypeOf((*descriptorpb.EnumDescriptorProto)(nil)), "Value")
var comments []string
for idx, value := range enum.GetValue() {
if reg.GetOmitEnumDefaultValue() && value.GetNumber() == 0 {
continue
}
if !isVisible(getEnumValueVisibilityOption(value), reg) {
continue
}
name := value.GetName()
if reg.GetEnumsAsInts() {
name = strconv.Itoa(int(value.GetNumber()))
}
if str := protoComments(reg, enum.File, enum.Outers, "EnumType", int32(enum.Index), protoPath, int32(idx)); str != "" {
comments = append(comments, name+": "+str)
}
}
if len(comments) > 0 {
return "- " + strings.Join(comments, "\n - ")
}
return ""
}
func protoComments(reg *descriptor.Registry, file *descriptor.File, outers []string, typeName string, typeIndex int32, fieldPaths ...int32) string {
if file.SourceCodeInfo == nil {
fmt.Fprintln(os.Stderr, file.GetName(), "descriptor.File should not contain nil SourceCodeInfo")
return ""
}
outerPaths := make([]int32, len(outers))
for i := range outers {
location := ""
if file.Package != nil {
location = file.GetPackage()
}
msg, err := reg.LookupMsg(location, strings.Join(outers[:i+1], "."))
if err != nil {
panic(err)
}
outerPaths[i] = int32(msg.Index)
}
for _, loc := range file.SourceCodeInfo.Location {
if !isProtoPathMatches(loc.Path, outerPaths, typeName, typeIndex, fieldPaths) {
continue
}
comments := ""
if loc.LeadingComments != nil {
comments = strings.TrimRight(*loc.LeadingComments, "\n")
comments = strings.TrimSpace(comments)
// TODO(ivucica): this is a hack to fix "// " being interpreted as "//".
// perhaps we should:
// - split by \n
// - determine if every (but first and last) line begins with " "
// - trim every line only if that is the case
// - join by \n
comments = strings.ReplaceAll(comments, "\n ", "\n")
comments = removeInternalComments(comments)
}
if loc.TrailingComments != nil {
trailing := strings.TrimSpace(*loc.TrailingComments)
if comments == "" {
comments = trailing
} else {
comments += "\n\n" + trailing
}
}
return comments
}
return ""
}
func goTemplateComments(comment string, data interface{}, reg *descriptor.Registry) string {
var temp bytes.Buffer
tpl, err := template.New("").Funcs(template.FuncMap{
// Allows importing documentation from a file
"import": func(name string) string {
file, err := os.ReadFile(name)
if err != nil {
return err.Error()
}
// Runs template over imported file
return goTemplateComments(string(file), data, reg)
},
// Grabs title and description from a field
"fieldcomments": func(msg *descriptor.Message, field *descriptor.Field) string {
return strings.ReplaceAll(fieldProtoComments(reg, msg, field), "\n", "<br>")
},
"arg": func(name string) string {
if v, f := reg.GetGoTemplateArgs()[name]; f {
return v
}
return fmt.Sprintf("goTemplateArg %s not found", name)
},
}).Parse(comment)
if err != nil {
// If there is an error parsing the templating insert the error as string in the comment
// to make it easier to debug the template error
return err.Error()
}
if err := tpl.Execute(&temp, data); err != nil {
// If there is an error executing the templating insert the error as string in the comment
// to make it easier to debug the error
return err.Error()
}
return temp.String()
}
var messageProtoPath = protoPathIndex(reflect.TypeOf((*descriptorpb.FileDescriptorProto)(nil)), "MessageType")
var nestedProtoPath = protoPathIndex(reflect.TypeOf((*descriptorpb.DescriptorProto)(nil)), "NestedType")
var packageProtoPath = protoPathIndex(reflect.TypeOf((*descriptorpb.FileDescriptorProto)(nil)), "Package")
var serviceProtoPath = protoPathIndex(reflect.TypeOf((*descriptorpb.FileDescriptorProto)(nil)), "Service")
var methodProtoPath = protoPathIndex(reflect.TypeOf((*descriptorpb.ServiceDescriptorProto)(nil)), "Method")
func isProtoPathMatches(paths []int32, outerPaths []int32, typeName string, typeIndex int32, fieldPaths []int32) bool {
if typeName == "Package" && typeIndex == packageProtoPath {
// path for package comments is just [2], and all the other processing
// is too complex for it.
if len(paths) == 0 || typeIndex != paths[0] {
return false
}
return true
}
if len(paths) != len(outerPaths)*2+2+len(fieldPaths) {
return false
}
if typeName == "Method" {
if paths[0] != serviceProtoPath || paths[2] != methodProtoPath {
return false
}
paths = paths[2:]
} else {
typeNameDescriptor := reflect.TypeOf((*descriptorpb.FileDescriptorProto)(nil))
if len(outerPaths) > 0 {
if paths[0] != messageProtoPath || paths[1] != outerPaths[0] {
return false
}
paths = paths[2:]
outerPaths = outerPaths[1:]
for i, v := range outerPaths {
if paths[i*2] != nestedProtoPath || paths[i*2+1] != v {
return false
}
}
paths = paths[len(outerPaths)*2:]
if typeName == "MessageType" {
typeName = "NestedType"
}
typeNameDescriptor = reflect.TypeOf((*descriptorpb.DescriptorProto)(nil))
}
if paths[0] != protoPathIndex(typeNameDescriptor, typeName) || paths[1] != typeIndex {
return false
}
paths = paths[2:]
}
for i, v := range fieldPaths {
if paths[i] != v {
return false
}
}
return true
}
// protoPathIndex returns a path component for google.protobuf.descriptor.SourceCode_Location.
//
// Specifically, it returns an id as generated from descriptor proto which
// can be used to determine what type the id following it in the path is.
// For example, if we are trying to locate comments related to a field named
// `Address` in a message named `Person`, the path will be:
//
// [4, a, 2, b]
//
// While `a` gets determined by the order in which the messages appear in
// the proto file, and `b` is the field index specified in the proto
// file itself, the path actually needs to specify that `a` refers to a
// message and not, say, a service; and that `b` refers to a field and not
// an option.
//
// protoPathIndex figures out the values 4 and 2 in the above example. Because
// messages are top level objects, the value of 4 comes from field id for
// `MessageType` inside `google.protobuf.descriptor.FileDescriptor` message.
// This field has a message type `google.protobuf.descriptor.DescriptorProto`.
// And inside message `DescriptorProto`, there is a field named `Field` with id
// 2.
//
// Some code generators seem to be hardcoding these values; this method instead
// interprets them from `descriptor.proto`-derived Go source as necessary.
func protoPathIndex(descriptorType reflect.Type, what string) int32 {
field, ok := descriptorType.Elem().FieldByName(what)
if !ok {
panic(fmt.Errorf("could not find protobuf descriptor type id for %s", what))
}
pbtag := field.Tag.Get("protobuf")
if pbtag == "" {
panic(fmt.Errorf("no Go tag 'protobuf' on protobuf descriptor for %s", what))
}
path, err := strconv.ParseInt(strings.Split(pbtag, ",")[1], 10, 32)
if err != nil {
panic(fmt.Errorf("protobuf descriptor id for %s cannot be converted to a number: %s", what, err.Error()))
}
return int32(path)
}
// extractOperationOptionFromMethodDescriptor extracts the message of type
// openapi_options.Operation from a given proto method's descriptor.
func extractOperationOptionFromMethodDescriptor(meth *descriptorpb.MethodDescriptorProto) (*openapi_options.Operation, error) {
if meth.Options == nil {
return nil, nil
}
if !proto.HasExtension(meth.Options, openapi_options.E_Openapiv2Operation) {
return nil, nil
}
ext := proto.GetExtension(meth.Options, openapi_options.E_Openapiv2Operation)
opts, ok := ext.(*openapi_options.Operation)
if !ok {
return nil, fmt.Errorf("extension is %T; want an Operation", ext)
}
return opts, nil
}
// extractSchemaOptionFromMessageDescriptor extracts the message of type
// openapi_options.Schema from a given proto message's descriptor.
func extractSchemaOptionFromMessageDescriptor(msg *descriptorpb.DescriptorProto) (*openapi_options.Schema, error) {
if msg.Options == nil {
return nil, nil
}
if !proto.HasExtension(msg.Options, openapi_options.E_Openapiv2Schema) {
return nil, nil
}
ext := proto.GetExtension(msg.Options, openapi_options.E_Openapiv2Schema)
opts, ok := ext.(*openapi_options.Schema)
if !ok {
return nil, fmt.Errorf("extension is %T; want a Schema", ext)
}
return opts, nil
}
// extractTagOptionFromServiceDescriptor extracts the tag of type
// openapi_options.Tag from a given proto service's descriptor.
func extractTagOptionFromServiceDescriptor(svc *descriptorpb.ServiceDescriptorProto) (*openapi_options.Tag, error) {
if svc.Options == nil {
return nil, nil
}
if !proto.HasExtension(svc.Options, openapi_options.E_Openapiv2Tag) {
return nil, nil
}
ext := proto.GetExtension(svc.Options, openapi_options.E_Openapiv2Tag)
opts, ok := ext.(*openapi_options.Tag)
if !ok {
return nil, fmt.Errorf("extension is %T; want a Tag", ext)
}
return opts, nil
}
// extractOpenAPIOptionFromFileDescriptor extracts the message of type
// openapi_options.OpenAPI from a given proto method's descriptor.
func extractOpenAPIOptionFromFileDescriptor(file *descriptorpb.FileDescriptorProto) (*openapi_options.Swagger, error) {
if file.Options == nil {
return nil, nil
}
if !proto.HasExtension(file.Options, openapi_options.E_Openapiv2Swagger) {
return nil, nil
}
ext := proto.GetExtension(file.Options, openapi_options.E_Openapiv2Swagger)
opts, ok := ext.(*openapi_options.Swagger)
if !ok {
return nil, fmt.Errorf("extension is %T; want a OpenAPI object", ext)
}
return opts, nil
}
func extractJSONSchemaFromFieldDescriptor(fd *descriptorpb.FieldDescriptorProto) (*openapi_options.JSONSchema, error) {
if fd.Options == nil {
return nil, nil
}
if !proto.HasExtension(fd.Options, openapi_options.E_Openapiv2Field) {
return nil, nil
}
ext := proto.GetExtension(fd.Options, openapi_options.E_Openapiv2Field)
opts, ok := ext.(*openapi_options.JSONSchema)
if !ok {
return nil, fmt.Errorf("extension is %T; want a JSONSchema object", ext)
}
return opts, nil
}
func extractFieldBehaviorFromFieldDescriptor(fd *descriptorpb.FieldDescriptorProto) ([]annotations.FieldBehavior, error) {
if fd.Options == nil {
return nil, nil
}
if !proto.HasExtension(fd.Options, annotations.E_FieldBehavior) {
return nil, nil
}
ext := proto.GetExtension(fd.Options, annotations.E_FieldBehavior)
opts, ok := ext.([]annotations.FieldBehavior)
if !ok {
return nil, fmt.Errorf("extension is %T; want a []FieldBehavior object", ext)
}
return opts, nil
}
func getFieldVisibilityOption(fd *descriptor.Field) *visibility.VisibilityRule {
if fd.Options == nil {
return nil
}
if !proto.HasExtension(fd.Options, visibility.E_FieldVisibility) {
return nil
}
ext := proto.GetExtension(fd.Options, visibility.E_FieldVisibility)
opts, ok := ext.(*visibility.VisibilityRule)
if !ok {
return nil
}
return opts
}
func getServiceVisibilityOption(fd *descriptor.Service) *visibility.VisibilityRule {
if fd.Options == nil {
return nil
}
if !proto.HasExtension(fd.Options, visibility.E_ApiVisibility) {
return nil
}
ext := proto.GetExtension(fd.Options, visibility.E_ApiVisibility)
opts, ok := ext.(*visibility.VisibilityRule)
if !ok {
return nil
}
return opts
}
func getMethodVisibilityOption(fd *descriptor.Method) *visibility.VisibilityRule {
if fd.Options == nil {
return nil
}
if !proto.HasExtension(fd.Options, visibility.E_MethodVisibility) {
return nil
}
ext := proto.GetExtension(fd.Options, visibility.E_MethodVisibility)
opts, ok := ext.(*visibility.VisibilityRule)
if !ok {
return nil
}
return opts
}
func getEnumValueVisibilityOption(fd *descriptorpb.EnumValueDescriptorProto) *visibility.VisibilityRule {
if fd.Options == nil {
return nil
}
if !proto.HasExtension(fd.Options, visibility.E_ValueVisibility) {
return nil
}
ext := proto.GetExtension(fd.Options, visibility.E_ValueVisibility)
opts, ok := ext.(*visibility.VisibilityRule)
if !ok {
return nil
}
return opts
}
func getMethodOpenAPIOption(reg *descriptor.Registry, meth *descriptor.Method) (*openapi_options.Operation, error) {
opts, err := extractOperationOptionFromMethodDescriptor(meth.MethodDescriptorProto)
if err != nil {
return nil, err
}
if opts != nil {
return opts, nil
}
opts, ok := reg.GetOpenAPIMethodOption(meth.FQMN())
if !ok {
return nil, nil
}
return opts, nil
}
func getMessageOpenAPIOption(reg *descriptor.Registry, msg *descriptor.Message) (*openapi_options.Schema, error) {
opts, err := extractSchemaOptionFromMessageDescriptor(msg.DescriptorProto)
if err != nil {
return nil, err
}
if opts != nil {
return opts, nil
}
opts, ok := reg.GetOpenAPIMessageOption(msg.FQMN())
if !ok {
return nil, nil
}
return opts, nil
}
func getServiceOpenAPIOption(reg *descriptor.Registry, svc *descriptor.Service) (*openapi_options.Tag, error) {
if opts, ok := reg.GetOpenAPIServiceOption(svc.FQSN()); ok {
return opts, nil
}
opts, err := extractTagOptionFromServiceDescriptor(svc.ServiceDescriptorProto)
if err != nil {
return nil, err
}
return opts, nil
}
func getFileOpenAPIOption(reg *descriptor.Registry, file *descriptor.File) (*openapi_options.Swagger, error) {
opts, err := extractOpenAPIOptionFromFileDescriptor(file.FileDescriptorProto)
if err != nil {
return nil, err
}
if opts != nil {
return opts, nil
}
opts, ok := reg.GetOpenAPIFileOption(*file.Name)
if !ok {
return nil, nil
}
return opts, nil
}
func getFieldOpenAPIOption(reg *descriptor.Registry, fd *descriptor.Field) (*openapi_options.JSONSchema, error) {
opts, err := extractJSONSchemaFromFieldDescriptor(fd.FieldDescriptorProto)
if err != nil {
return nil, err
}
if opts != nil {
return opts, nil
}
opts, ok := reg.GetOpenAPIFieldOption(fd.FQFN())
if !ok {
return nil, nil
}
return opts, nil
}
func getFieldBehaviorOption(reg *descriptor.Registry, fd *descriptor.Field) ([]annotations.FieldBehavior, error) {
opts, err := extractFieldBehaviorFromFieldDescriptor(fd.FieldDescriptorProto)
if err != nil {
return nil, err
}
if opts != nil {
return opts, nil
}
return opts, nil
}
func protoJSONSchemaToOpenAPISchemaCore(j *openapi_options.JSONSchema, reg *descriptor.Registry, refs refMap) schemaCore {
ret := schemaCore{}
if j.GetRef() != "" {
openapiName, ok := fullyQualifiedNameToOpenAPIName(j.GetRef(), reg)
if ok {
ret.Ref = "#/definitions/" + openapiName
if refs != nil {
refs[j.GetRef()] = struct{}{}
}
} else {
ret.Ref += j.GetRef()
}
} else {
f, t := protoJSONSchemaTypeToFormat(j.GetType())
ret.Format = f
ret.Type = t
}
return ret
}
func updateswaggerObjectFromJSONSchema(s *openapiSchemaObject, j *openapi_options.JSONSchema, reg *descriptor.Registry, data interface{}) {
s.Title = j.GetTitle()
s.Description = j.GetDescription()
if reg.GetUseGoTemplate() {
s.Title = goTemplateComments(s.Title, data, reg)
s.Description = goTemplateComments(s.Description, data, reg)
}
if s.Type == "array" {
s.Items.MaxLength = j.GetMaxLength()
s.Items.MinLength = j.GetMinLength()
s.Items.Pattern = j.GetPattern()
s.Items.Default = j.GetDefault()
s.Items.UniqueItems = j.GetUniqueItems()
s.Items.MaxProperties = j.GetMaxProperties()
s.Items.MinProperties = j.GetMinProperties()
s.Items.Required = j.GetRequired()
s.Items.Minimum = j.GetMinimum()
s.Items.Maximum = j.GetMaximum()
s.Items.ReadOnly = j.GetReadOnly()
s.Items.MultipleOf = j.GetMultipleOf()
s.Items.ExclusiveMaximum = j.GetExclusiveMaximum()
s.Items.ExclusiveMinimum = j.GetExclusiveMinimum()
s.Items.Enum = j.GetEnum()
if j.GetDefault() == "" {
s.Items.Default = nil
}
if len(j.GetEnum()) == 0 {
s.Items.Enum = nil
}
if j.GetFormat() != "" {
s.Items.Format = j.GetFormat()
}
} else {
s.MaxLength = j.GetMaxLength()
s.MinLength = j.GetMinLength()
s.Pattern = j.GetPattern()
s.Default = j.GetDefault()
s.UniqueItems = j.GetUniqueItems()
s.MaxProperties = j.GetMaxProperties()
s.MinProperties = j.GetMinProperties()
s.Required = j.GetRequired()
s.Minimum = j.GetMinimum()
s.Maximum = j.GetMaximum()
s.ReadOnly = j.GetReadOnly()
s.MultipleOf = j.GetMultipleOf()
s.ExclusiveMaximum = j.GetExclusiveMaximum()
s.ExclusiveMinimum = j.GetExclusiveMinimum()
s.Enum = j.GetEnum()
if j.GetDefault() == "" {
s.Default = nil
}
if len(j.GetEnum()) == 0 {
s.Enum = nil
}
if j.GetFormat() != "" {
s.Format = j.GetFormat()
}
}
s.MaxItems = j.GetMaxItems()
s.MinItems = j.GetMinItems()
if j.GetExtensions() != nil {
exts, err := processExtensions(j.GetExtensions())
if err != nil {
panic(err)
}
s.extensions = exts
}
if overrideType := j.GetType(); len(overrideType) > 0 {
s.Type = strings.ToLower(overrideType[0].String())
}
if j.GetExample() != "" {
s.Example = RawExample(j.GetExample())
}
}
func updateSwaggerObjectFromFieldBehavior(s *openapiSchemaObject, j []annotations.FieldBehavior, reg *descriptor.Registry, field *descriptor.Field) {
for _, fb := range j {
switch fb {
case annotations.FieldBehavior_REQUIRED:
if reg.GetUseJSONNamesForFields() {
s.Required = append(s.Required, *field.JsonName)
} else {
s.Required = append(s.Required, *field.Name)
}
case annotations.FieldBehavior_OUTPUT_ONLY:
s.ReadOnly = true
case annotations.FieldBehavior_FIELD_BEHAVIOR_UNSPECIFIED:
case annotations.FieldBehavior_OPTIONAL:
case annotations.FieldBehavior_INPUT_ONLY:
// OpenAPI v3 supports a writeOnly property, but this is not supported in Open API v2
case annotations.FieldBehavior_IMMUTABLE:
}
}
}
func openapiSchemaFromProtoSchema(s *openapi_options.Schema, reg *descriptor.Registry, refs refMap, data interface{}) openapiSchemaObject {
ret := openapiSchemaObject{
ExternalDocs: protoExternalDocumentationToOpenAPIExternalDocumentation(s.GetExternalDocs(), reg, data),
}
ret.schemaCore = protoJSONSchemaToOpenAPISchemaCore(s.GetJsonSchema(), reg, refs)
updateswaggerObjectFromJSONSchema(&ret, s.GetJsonSchema(), reg, data)
if s != nil && s.Example != "" {
ret.Example = RawExample(s.Example)
}
return ret
}
func openapiExamplesFromProtoExamples(in map[string]string) map[string]interface{} {
if len(in) == 0 {
return nil
}
out := make(map[string]interface{}, len(in))
for mimeType, exampleStr := range in {
switch mimeType {
case "application/json":
// JSON example objects are rendered raw.
out[mimeType] = RawExample(exampleStr)
default:
// All other mimetype examples are rendered as strings.
out[mimeType] = exampleStr
}
}
return out
}
func protoJSONSchemaTypeToFormat(in []openapi_options.JSONSchema_JSONSchemaSimpleTypes) (string, string) {
if len(in) == 0 {
return "", ""
}
// Can't support more than 1 type, just return the first element.
// This is due to an inconsistency in the design of the openapiv2 proto
// and that used in schemaCore. schemaCore uses the v3 definition of types,
// which only allows a single string, while the openapiv2 proto uses the OpenAPI v2
// definition, which defers to the JSON schema definition, which allows a string or an array.
// Sources:
// https://swagger.io/specification/#itemsObject
// https://tools.ietf.org/html/draft-fge-json-schema-validation-00#section-5.5.2
switch in[0] {
case openapi_options.JSONSchema_UNKNOWN, openapi_options.JSONSchema_NULL:
return "", ""
case openapi_options.JSONSchema_OBJECT:
return "object", ""
case openapi_options.JSONSchema_ARRAY:
return "array", ""
case openapi_options.JSONSchema_BOOLEAN:
// NOTE: in OpenAPI specification, format should be empty on boolean type
return "boolean", ""
case openapi_options.JSONSchema_INTEGER:
return "integer", "int32"
case openapi_options.JSONSchema_NUMBER:
return "number", "double"
case openapi_options.JSONSchema_STRING:
// NOTE: in OpenAPI specification, format should be empty on string type
return "string", ""
default:
// Maybe panic?
return "", ""
}
}
func protoExternalDocumentationToOpenAPIExternalDocumentation(in *openapi_options.ExternalDocumentation, reg *descriptor.Registry, data interface{}) *openapiExternalDocumentationObject {
if in == nil {
return nil
}
if reg.GetUseGoTemplate() {
in.Description = goTemplateComments(in.Description, data, reg)
}
return &openapiExternalDocumentationObject{
Description: in.Description,
URL: in.Url,
}
}
func addCustomRefs(d openapiDefinitionsObject, reg *descriptor.Registry, refs refMap) error {
if len(refs) == 0 {
return nil
}
msgMap := make(messageMap)
enumMap := make(enumMap)
for ref := range refs {
swgName, swgOk := fullyQualifiedNameToOpenAPIName(ref, reg)
if !swgOk {
grpclog.Errorf("can't resolve OpenAPI name from CustomRef %q", ref)
continue
}
if _, ok := d[swgName]; ok {
// Skip already existing definitions
delete(refs, ref)
continue
}
msg, err := reg.LookupMsg("", ref)
if err == nil {
msgMap[swgName] = msg
continue
}
enum, err := reg.LookupEnum("", ref)
if err == nil {
enumMap[swgName] = enum
continue
}
// ?? Should be either enum or msg
}
if err := renderMessagesAsDefinition(msgMap, d, reg, refs, nil); err != nil {
return err
}
renderEnumerationsAsDefinition(enumMap, d, reg)
// Run again in case any new refs were added
return addCustomRefs(d, reg, refs)
}
func lowerCamelCase(fieldName string, fields []*descriptor.Field, msgs []*descriptor.Message) string {
for _, oneField := range fields {
if oneField.GetName() == fieldName {
return oneField.GetJsonName()
}
}
messageNameToFieldsToJSONName := make(map[string]map[string]string, len(msgs))
fieldNameToType := make(map[string]string)
for _, msg := range msgs {
fieldNameToJSONName := make(map[string]string)
for _, oneField := range msg.GetField() {
fieldNameToJSONName[oneField.GetName()] = oneField.GetJsonName()
fieldNameToType[oneField.GetName()] = oneField.GetTypeName()
}
messageNameToFieldsToJSONName[msg.GetName()] = fieldNameToJSONName
}
if strings.Contains(fieldName, ".") {
fieldNames := strings.Split(fieldName, ".")
fieldNamesWithCamelCase := make([]string, 0)
for i := 0; i < len(fieldNames)-1; i++ {
fieldNamesWithCamelCase = append(fieldNamesWithCamelCase, casing.JSONCamelCase(fieldNames[i]))
}
prefix := strings.Join(fieldNamesWithCamelCase, ".")
reservedJSONName := getReservedJSONName(fieldName, messageNameToFieldsToJSONName, fieldNameToType)
if reservedJSONName != "" {
return prefix + "." + reservedJSONName
}
}
return casing.JSONCamelCase(fieldName)
}
func getReservedJSONName(fieldName string, messageNameToFieldsToJSONName map[string]map[string]string, fieldNameToType map[string]string) string {
if len(strings.Split(fieldName, ".")) == 2 {
fieldNames := strings.Split(fieldName, ".")
firstVariable := fieldNames[0]
firstType := fieldNameToType[firstVariable]
firstTypeShortNames := strings.Split(firstType, ".")
firstTypeShortName := firstTypeShortNames[len(firstTypeShortNames)-1]
return messageNameToFieldsToJSONName[firstTypeShortName][fieldNames[1]]
}
fieldNames := strings.Split(fieldName, ".")
return getReservedJSONName(strings.Join(fieldNames[1:], "."), messageNameToFieldsToJSONName, fieldNameToType)
}
func find(a []string, x string) int {
// This is a linear search but we are dealing with a small number of fields
for i, n := range a {
if x == n {
return i
}
}
return -1
}
// Make a deep copy of the outer parameters that has paramName as the first component,
// but remove the first component of the field path.
func subPathParams(paramName string, outerParams []descriptor.Parameter) []descriptor.Parameter {
var innerParams []descriptor.Parameter
for _, p := range outerParams {
if len(p.FieldPath) > 1 && p.FieldPath[0].Name == paramName {
subParam := descriptor.Parameter{
FieldPath: p.FieldPath[1:],
Target: p.Target,
Method: p.Method,
}
innerParams = append(innerParams, subParam)
}
}
return innerParams
}
func getFieldConfiguration(reg *descriptor.Registry, fd *descriptor.Field) *openapi_options.JSONSchema_FieldConfiguration {
if j, err := getFieldOpenAPIOption(reg, fd); err == nil {
return j.GetFieldConfiguration()
}
return nil
}
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