127 lines
3.6 KiB
Go
127 lines
3.6 KiB
Go
package zipartifacts
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import (
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"context"
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"fmt"
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"io"
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"net/http"
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"os"
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"strings"
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"gitlab.com/gitlab-org/gitlab/workhorse/internal/httprs"
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"gitlab.com/gitlab-org/gitlab/workhorse/internal/transport"
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zip "gitlab.com/gitlab-org/golang-archive-zip"
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"gitlab.com/gitlab-org/labkit/mask"
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)
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var httpClient = &http.Client{
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Transport: transport.NewRestrictedTransport(
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transport.WithDisabledCompression(), // To avoid bugs when serving compressed files from object storage
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),
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}
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type archive struct {
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reader io.ReaderAt
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size int64
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}
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// OpenArchive will open a zip.Reader from a local path or a remote object store URL
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// in case of remote url it will make use of ranged requestes to support seeking.
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// If the path do not exists error will be ErrArchiveNotFound,
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// if the file isn't a zip archive error will be ErrNotAZip
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func OpenArchive(ctx context.Context, archivePath string) (*zip.Reader, error) {
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archive, err := openArchiveLocation(ctx, archivePath)
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if err != nil {
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return nil, err
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}
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return openZipReader(archive.reader, archive.size)
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}
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// OpenArchiveWithReaderFunc opens a zip.Reader from either local path or a
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// remote object, similarly to OpenArchive function. The difference is that it
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// allows passing a readerFunc that takes a io.ReaderAt that is either going to
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// be os.File or a custom reader we use to read from object storage. The
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// readerFunc can augment the archive reader and return a type that satisfies
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// io.ReaderAt.
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func OpenArchiveWithReaderFunc(ctx context.Context, location string, readerFunc func(io.ReaderAt, int64) io.ReaderAt) (*zip.Reader, error) {
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archive, err := openArchiveLocation(ctx, location)
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if err != nil {
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return nil, err
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}
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return openZipReader(readerFunc(archive.reader, archive.size), archive.size)
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}
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func openArchiveLocation(ctx context.Context, location string) (*archive, error) {
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if isURL(location) {
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return openHTTPArchive(ctx, location)
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}
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return openFileArchive(ctx, location)
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}
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func isURL(path string) bool {
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return strings.HasPrefix(path, "http://") || strings.HasPrefix(path, "https://")
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}
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func openHTTPArchive(ctx context.Context, archivePath string) (*archive, error) {
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scrubbedArchivePath := mask.URL(archivePath)
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req, err := http.NewRequest(http.MethodGet, archivePath, nil)
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if err != nil {
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return nil, fmt.Errorf("can't create HTTP GET %q: %v", scrubbedArchivePath, err)
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}
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req = req.WithContext(ctx)
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resp, err := httpClient.Do(req.WithContext(ctx))
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if err != nil {
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return nil, fmt.Errorf("HTTP GET %q: %v", scrubbedArchivePath, err)
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} else if resp.StatusCode == http.StatusNotFound {
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return nil, ErrorCode[CodeArchiveNotFound]
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} else if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("HTTP GET %q: %d: %v", scrubbedArchivePath, resp.StatusCode, resp.Status)
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}
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rs := httprs.NewHttpReadSeeker(resp, httpClient)
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go func() {
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<-ctx.Done()
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resp.Body.Close()
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rs.Close()
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}()
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return &archive{reader: rs, size: resp.ContentLength}, nil
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}
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func openFileArchive(ctx context.Context, archivePath string) (*archive, error) {
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file, err := os.Open(archivePath)
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if err != nil {
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if os.IsNotExist(err) {
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return nil, ErrorCode[CodeArchiveNotFound]
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}
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}
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go func() {
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<-ctx.Done()
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// We close the archive from this goroutine so that we can safely return a *zip.Reader instead of a *zip.ReadCloser
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file.Close()
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}()
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stat, err := file.Stat()
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if err != nil {
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return nil, err
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}
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return &archive{reader: file, size: stat.Size()}, nil
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}
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func openZipReader(archive io.ReaderAt, size int64) (*zip.Reader, error) {
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reader, err := zip.NewReader(archive, size)
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if err != nil {
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return nil, ErrorCode[CodeNotZip]
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}
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return reader, nil
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}
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