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|
package customaction
import (
"bytes"
"context"
"errors"
"io"
"net/http"
"gitlab.com/gitlab-org/labkit/log"
"gitlab.com/gitlab-org/gitlab-shell/v14/client"
"gitlab.com/gitlab-org/gitlab-shell/v14/internal/command/readwriter"
"gitlab.com/gitlab-org/gitlab-shell/v14/internal/config"
"gitlab.com/gitlab-org/gitlab-shell/v14/internal/gitlabnet"
"gitlab.com/gitlab-org/gitlab-shell/v14/internal/gitlabnet/accessverifier"
"gitlab.com/gitlab-org/gitlab-shell/v14/internal/pktline"
)
type Request struct {
SecretToken []byte `json:"secret_token"`
Data accessverifier.CustomPayloadData `json:"data"`
Output []byte `json:"output"`
}
type Response struct {
Result []byte `json:"result"`
Message string `json:"message"`
}
type Command struct {
Config *config.Config
ReadWriter *readwriter.ReadWriter
EOFSent bool
}
// When `geo_proxy_direct_to_primary` feature flag is enabled, a Git over HTTP direct request
// to primary repo is performed instead of proxying the request through Gitlab Rails.
// After the feature flag is enabled by default and removed, this package will be removed along with it.
func (c *Command) Execute(ctx context.Context, response *accessverifier.Response) error {
data := response.Payload.Data
apiEndpoints := data.ApiEndpoints
if len(apiEndpoints) == 0 {
return errors.New("Custom action error: Empty API endpoints")
}
return c.processApiEndpoints(ctx, response)
}
func (c *Command) processApiEndpoints(ctx context.Context, response *accessverifier.Response) error {
client, err := gitlabnet.GetClient(c.Config)
if err != nil {
return err
}
data := response.Payload.Data
request := &Request{Data: data}
request.Data.UserId = response.Who
for _, endpoint := range data.ApiEndpoints {
ctxlog := log.WithContextFields(ctx, log.Fields{
"primary_repo": data.PrimaryRepo,
"endpoint": endpoint,
})
ctxlog.Info("customaction: processApiEndpoints: Performing custom action")
response, err := c.performRequest(ctx, client, endpoint, request)
if err != nil {
return err
}
// Print to os.Stdout the result contained in the response
//
if err = c.displayResult(response.Result); err != nil {
return err
}
// In the context of the git push sequence of events, it's necessary to read
// stdin in order to capture output to pass onto subsequent commands
//
var output []byte
if c.EOFSent {
output, err = c.readFromStdin()
if err != nil {
return err
}
} else {
output = c.readFromStdinNoEOF()
}
ctxlog.WithFields(log.Fields{
"eof_sent": c.EOFSent,
"stdin_bytes": len(output),
}).Debug("customaction: processApiEndpoints: stdin buffered")
request.Output = output
}
return nil
}
func (c *Command) performRequest(ctx context.Context, client *client.GitlabNetClient, endpoint string, request *Request) (*Response, error) {
response, err := client.DoRequest(ctx, http.MethodPost, endpoint, request)
if err != nil {
return nil, err
}
defer response.Body.Close()
cr := &Response{}
if err := gitlabnet.ParseJSON(response, cr); err != nil {
return nil, err
}
return cr, nil
}
func (c *Command) readFromStdin() ([]byte, error) {
var output []byte
var needsPackData bool
scanner := pktline.NewScanner(c.ReadWriter.In)
for scanner.Scan() {
line := scanner.Bytes()
output = append(output, line...)
if pktline.IsFlush(line) {
break
}
if !needsPackData && !pktline.IsRefRemoval(line) {
needsPackData = true
}
}
if needsPackData {
packData := new(bytes.Buffer)
_, err := io.Copy(packData, c.ReadWriter.In)
output = append(output, packData.Bytes()...)
return output, err
} else {
return output, nil
}
}
func (c *Command) readFromStdinNoEOF() []byte {
var output []byte
scanner := pktline.NewScanner(c.ReadWriter.In)
for scanner.Scan() {
line := scanner.Bytes()
output = append(output, line...)
if pktline.IsDone(line) {
break
}
}
return output
}
func (c *Command) displayResult(result []byte) error {
_, err := io.Copy(c.ReadWriter.Out, bytes.NewReader(result))
return err
}
|
