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package router
import (
"context"
"encoding/json"
"errors"
"fmt"
"net/http"
"strconv"
"github.com/gorilla/mux"
"github.com/rootless-containers/rootlesskit/v2/pkg/api"
"github.com/rootless-containers/rootlesskit/v2/pkg/httputil"
"github.com/rootless-containers/rootlesskit/v2/pkg/port"
"github.com/rootless-containers/rootlesskit/v2/pkg/version"
)
// NetworkDriver is implemented by network.ParentDriver
type NetworkDriver interface {
Info(context.Context) (*api.NetworkDriverInfo, error)
}
// PortDriver is implemented by port.ParentDriver
type PortDriver interface {
Info(context.Context) (*api.PortDriverInfo, error)
port.Manager
}
type Backend struct {
StateDir string
ChildPID int
// NetworkDriver can be nil
NetworkDriver NetworkDriver
// PortDriver MUST be thread-safe.
// PortDriver can be nil
PortDriver PortDriver
}
func (b *Backend) onPortDriverNil(w http.ResponseWriter, r *http.Request) {
httputil.WriteError(w, r, errors.New("no PortDriver is available"), http.StatusBadRequest)
}
// GetPorts is handler for GET /v{N}/ports
func (b *Backend) GetPorts(w http.ResponseWriter, r *http.Request) {
if b.PortDriver == nil {
b.onPortDriverNil(w, r)
return
}
ports, err := b.PortDriver.ListPorts(context.TODO())
if err != nil {
httputil.WriteError(w, r, err, http.StatusInternalServerError)
return
}
m, err := json.Marshal(ports)
if err != nil {
httputil.WriteError(w, r, err, http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
w.Write(m)
}
// PostPort is the handler for POST /v{N}/ports
func (b *Backend) PostPort(w http.ResponseWriter, r *http.Request) {
if b.PortDriver == nil {
b.onPortDriverNil(w, r)
return
}
decoder := json.NewDecoder(r.Body)
var portSpec port.Spec
if err := decoder.Decode(&portSpec); err != nil {
httputil.WriteError(w, r, err, http.StatusBadRequest)
return
}
portStatus, err := b.PortDriver.AddPort(context.TODO(), portSpec)
if err != nil {
httputil.WriteError(w, r, err, http.StatusBadRequest)
return
}
m, err := json.Marshal(portStatus)
if err != nil {
httputil.WriteError(w, r, err, http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusCreated)
w.Write(m)
}
// DeletePort is the handler for POST /v{N}/ports/{id}
func (b *Backend) DeletePort(w http.ResponseWriter, r *http.Request) {
if b.PortDriver == nil {
b.onPortDriverNil(w, r)
return
}
idStr, ok := mux.Vars(r)["id"]
if !ok {
httputil.WriteError(w, r, errors.New("id not specified"), http.StatusBadRequest)
return
}
id, err := strconv.Atoi(idStr)
if err != nil {
httputil.WriteError(w, r, fmt.Errorf("bad id %s: %w", idStr, err), http.StatusBadRequest)
return
}
if err := b.PortDriver.RemovePort(context.TODO(), id); err != nil {
httputil.WriteError(w, r, err, http.StatusBadRequest)
return
}
w.WriteHeader(http.StatusOK)
}
func (b *Backend) GetInfo(w http.ResponseWriter, r *http.Request) {
info := &api.Info{
APIVersion: api.Version,
Version: version.Version,
StateDir: b.StateDir,
ChildPID: b.ChildPID,
}
if b.NetworkDriver != nil {
ndInfo, err := b.NetworkDriver.Info(context.Background())
if err != nil {
httputil.WriteError(w, r, err, http.StatusInternalServerError)
return
}
info.NetworkDriver = ndInfo
}
if b.PortDriver != nil {
pdInfo, err := b.PortDriver.Info(context.Background())
if err != nil {
httputil.WriteError(w, r, err, http.StatusInternalServerError)
return
}
info.PortDriver = pdInfo
}
m, err := json.Marshal(info)
if err != nil {
httputil.WriteError(w, r, err, http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
w.Write(m)
}
func AddRoutes(r *mux.Router, b *Backend) {
v1 := r.PathPrefix("/v1").Subrouter()
v1.Path("/ports").Methods("GET").HandlerFunc(b.GetPorts)
v1.Path("/ports").Methods("POST").HandlerFunc(b.PostPort)
v1.Path("/ports/{id}").Methods("DELETE").HandlerFunc(b.DeletePort)
v1.Path("/info").Methods("GET").HandlerFunc(b.GetInfo)
}
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