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package artifacts
import (
"bufio"
"fmt"
"io"
"log"
"mime"
"net/http"
"os"
"os/exec"
"path/filepath"
"strings"
"syscall"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/helper"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/senddata"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/zipartifacts"
)
type entry struct{ senddata.Prefix }
type entryParams struct{ Archive, Entry string }
var SendEntry = &entry{"artifacts-entry:"}
// Artifacts downloader doesn't support ranges when downloading a single file
func (e *entry) Inject(w http.ResponseWriter, r *http.Request, sendData string) {
var params entryParams
if err := e.Unpack(¶ms, sendData); err != nil {
helper.Fail500(w, r, fmt.Errorf("SendEntry: unpack sendData: %v", err))
return
}
log.Printf("SendEntry: sending %q from %q for %q", params.Entry, params.Archive, r.URL.Path)
if params.Archive == "" || params.Entry == "" {
helper.Fail500(w, r, fmt.Errorf("SendEntry: Archive or Entry is empty"))
return
}
err := unpackFileFromZip(params.Archive, params.Entry, w.Header(), w)
if os.IsNotExist(err) {
http.NotFound(w, r)
} else if err != nil {
helper.Fail500(w, r, fmt.Errorf("SendEntry: %v", err))
}
}
func detectFileContentType(fileName string) string {
contentType := mime.TypeByExtension(filepath.Ext(fileName))
if contentType == "" {
contentType = "application/octet-stream"
}
return contentType
}
func unpackFileFromZip(archiveFileName, encodedFilename string, headers http.Header, output io.Writer) error {
fileName, err := zipartifacts.DecodeFileEntry(encodedFilename)
if err != nil {
return err
}
catFile := exec.Command("gitlab-zip-cat", archiveFileName, encodedFilename)
catFile.Stderr = os.Stderr
catFile.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
stdout, err := catFile.StdoutPipe()
if err != nil {
return fmt.Errorf("create gitlab-zip-cat stdout pipe: %v", err)
}
if err := catFile.Start(); err != nil {
return fmt.Errorf("start %v: %v", catFile.Args, err)
}
defer helper.CleanUpProcessGroup(catFile)
basename := filepath.Base(fileName)
reader := bufio.NewReader(stdout)
contentLength, err := reader.ReadString('\n')
if err != nil {
if catFileErr := waitCatFile(catFile); catFileErr != nil {
return catFileErr
}
return fmt.Errorf("read content-length: %v", err)
}
contentLength = strings.TrimSuffix(contentLength, "\n")
// Write http headers about the file
headers.Set("Content-Length", contentLength)
headers.Set("Content-Type", detectFileContentType(fileName))
headers.Set("Content-Disposition", "attachment; filename=\""+escapeQuotes(basename)+"\"")
// Copy file body to client
if _, err := io.Copy(output, reader); err != nil {
return fmt.Errorf("copy stdout of %v: %v", catFile.Args, err)
}
return waitCatFile(catFile)
}
func waitCatFile(cmd *exec.Cmd) error {
err := cmd.Wait()
if err == nil {
return nil
}
if st, ok := helper.ExitStatus(err); ok && st == zipartifacts.StatusEntryNotFound {
return os.ErrNotExist
}
return fmt.Errorf("wait for %v to finish: %v", cmd.Args, err)
}
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