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package stats
import (
"bytes"
"compress/gzip"
"context"
"fmt"
"io"
"net/http"
"time"
"gitlab.com/gitlab-org/gitaly/internal/git/pktline"
)
// ResponseBody returns how long it took to receive the last bytes of the response body.
func (p *HTTPSendPack) ResponseBody() time.Duration { return p.stats.responseBody.Sub(p.start) }
// BandPayloadSize returns how many bytes were received on a specific sideband.
func (p *HTTPSendPack) BandPayloadSize(b string) int64 { return p.stats.multiband[b].size }
// BandFirstPacket returns how long it took to receive the first packet on a specific sideband.
func (p *HTTPSendPack) BandFirstPacket(b string) time.Duration {
return p.stats.multiband[b].firstPacket.Sub(p.start)
}
// HTTPSendPack encapsulates statistics about an emulated git-send-pack(1) request.
type HTTPSendPack struct {
start time.Time
header time.Time
stats SendPack
}
func buildSendPackRequest(
ctx context.Context,
url, user, password string,
commands []PushCommand,
packfile io.Reader,
) (*http.Request, error) {
var requestBuffer bytes.Buffer
zipper := gzip.NewWriter(&requestBuffer)
for i, command := range commands {
c := fmt.Sprintf("%s %s %s", command.OldOID, command.NewOID, command.Reference)
if i == 0 {
c += "\x00side-band-64k report-status delete-refs"
}
if _, err := pktline.WriteString(zipper, c); err != nil {
return nil, fmt.Errorf("writing command: %w", err)
}
}
if err := pktline.WriteFlush(zipper); err != nil {
return nil, fmt.Errorf("terminating command list: %w", err)
}
if packfile != nil {
if _, err := io.Copy(zipper, packfile); err != nil {
return nil, fmt.Errorf("sending packfile: %w", err)
}
}
if err := zipper.Close(); err != nil {
return nil, fmt.Errorf("finalizing request body: %w", err)
}
request, err := http.NewRequest("POST", url+"/git-receive-pack", &requestBuffer)
if err != nil {
return nil, fmt.Errorf("creating request: %w", err)
}
request = request.WithContext(ctx)
if user != "" {
request.SetBasicAuth(user, password)
}
for k, v := range map[string]string{
"User-Agent": "gitaly-debug",
"Content-Type": "application/x-git-receive-pack-request",
"Accept": "application/x-git-receive-pack-result",
"Content-Encoding": "gzip",
} {
request.Header.Set(k, v)
}
return request, nil
}
func performHTTPSendPack(
ctx context.Context,
url, user, password string,
commands []PushCommand,
packfile io.Reader,
reportProgress func(string, ...interface{}),
) (HTTPSendPack, error) {
request, err := buildSendPackRequest(ctx, url, user, password, commands, packfile)
if err != nil {
return HTTPSendPack{}, err
}
reportProgress("---\n")
reportProgress("--- git-send-pack %v\n", request.URL)
reportProgress("---\n")
sendPack := HTTPSendPack{
start: time.Now(),
stats: SendPack{
ReportProgress: func(b []byte) { reportProgress("%s", string(b)) },
},
}
response, err := http.DefaultClient.Do(request)
if err != nil {
return HTTPSendPack{}, fmt.Errorf("creating send-pack request: %w", err)
}
defer response.Body.Close()
if code := response.StatusCode; code < 200 || code >= 400 {
return HTTPSendPack{}, fmt.Errorf("unexpected HTTP status: %d", code)
}
sendPack.header = time.Now()
reportProgress("response code: %d\n", response.StatusCode)
reportProgress("response header: %v\n", response.Header)
body := response.Body
if response.Header.Get("Content-Encoding") == "gzip" {
body, err = gzip.NewReader(body)
if err != nil {
return HTTPSendPack{}, fmt.Errorf("setting up gzip reader: %w", err)
}
}
if err := sendPack.stats.Parse(body); err != nil {
return HTTPSendPack{}, fmt.Errorf("parsing packfile response: %w", err)
}
return sendPack, nil
}
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