From c2a5011c0d65cfd6c1ab5d6eef9778551ed56860 Mon Sep 17 00:00:00 2001 From: Valentin Rothberg Date: Tue, 8 Dec 2020 16:18:49 +0100 Subject: archive: move stat-header handling into copy package Move handling the stat header into `pkg/copy`. All copy-related should ideally be located in this package to increase locality and reduce scattering where possible. Signed-off-by: Valentin Rothberg --- pkg/api/handlers/compat/containers_archive.go | 45 ++------------------------- 1 file changed, 2 insertions(+), 43 deletions(-) (limited to 'pkg/api/handlers') diff --git a/pkg/api/handlers/compat/containers_archive.go b/pkg/api/handlers/compat/containers_archive.go index 223eb2cd5..bb84f86be 100644 --- a/pkg/api/handlers/compat/containers_archive.go +++ b/pkg/api/handlers/compat/containers_archive.go @@ -1,13 +1,8 @@ package compat import ( - "bytes" - "encoding/base64" - "encoding/json" "fmt" "net/http" - "os" - "time" "github.com/containers/podman/v2/libpod" "github.com/containers/podman/v2/libpod/define" @@ -71,12 +66,12 @@ func handleHeadAndGet(w http.ResponseWriter, r *http.Request, decoder *schema.De utils.Error(w, "Not found.", http.StatusNotFound, errors.Wrapf(err, "error stating container path %q", query.Path)) return } - statHeader, err := fileInfoToDockerStats(info) + statHeader, err := copy.EncodeFileInfo(info) if err != nil { utils.Error(w, "Something went wrong", http.StatusInternalServerError, err) return } - w.Header().Add("X-Docker-Container-Path-Stat", statHeader) + w.Header().Add(copy.XDockerContainerPathStatHeader, statHeader) // Our work is done when the user is interested in the header only. if r.Method == http.MethodHead { @@ -98,42 +93,6 @@ func handleHeadAndGet(w http.ResponseWriter, r *http.Request, decoder *schema.De } } -func fileInfoToDockerStats(info *copy.FileInfo) (string, error) { - dockerStats := struct { - Name string `json:"name"` - Size int64 `json:"size"` - Mode os.FileMode `json:"mode"` - ModTime time.Time `json:"mtime"` - LinkTarget string `json:"linkTarget"` - }{ - Name: info.Name, - Size: info.Size, - Mode: info.Mode, - ModTime: info.ModTime, - LinkTarget: info.LinkTarget, - } - - jsonBytes, err := json.Marshal(&dockerStats) - if err != nil { - return "", errors.Wrap(err, "failed to serialize file stats") - } - - buff := bytes.NewBuffer(make([]byte, 0, 128)) - base64encoder := base64.NewEncoder(base64.StdEncoding, buff) - - _, err = base64encoder.Write(jsonBytes) - if err != nil { - return "", err - } - - err = base64encoder.Close() - if err != nil { - return "", err - } - - return buff.String(), nil -} - func handlePut(w http.ResponseWriter, r *http.Request, decoder *schema.Decoder, runtime *libpod.Runtime) { query := struct { Path string `schema:"path"` -- cgit v1.2.3-54-g00ecf From a12323884fd576063ba8f5785a3c9c2e48140c7f Mon Sep 17 00:00:00 2001 From: Valentin Rothberg Date: Wed, 9 Dec 2020 12:18:14 +0100 Subject: pkg/copy: introduce a Copier Introduce a `Copier` object to separate the copy-rule enforcement from copying. That allows for a better error reporting of the REST API. Signed-off-by: Valentin Rothberg --- pkg/api/handlers/compat/containers_archive.go | 19 ++++++-- pkg/copy/copy.go | 67 ++++++++++++++++++++------- pkg/domain/infra/abi/cp.go | 6 ++- 3 files changed, 70 insertions(+), 22 deletions(-) (limited to 'pkg/api/handlers') diff --git a/pkg/api/handlers/compat/containers_archive.go b/pkg/api/handlers/compat/containers_archive.go index bb84f86be..d8197415c 100644 --- a/pkg/api/handlers/compat/containers_archive.go +++ b/pkg/api/handlers/compat/containers_archive.go @@ -10,6 +10,7 @@ import ( "github.com/containers/podman/v2/pkg/copy" "github.com/gorilla/schema" "github.com/pkg/errors" + "github.com/sirupsen/logrus" ) func Archive(w http.ResponseWriter, r *http.Request) { @@ -86,11 +87,16 @@ func handleHeadAndGet(w http.ResponseWriter, r *http.Request, decoder *schema.De return } - w.WriteHeader(http.StatusOK) - if err := copy.Copy(&source, &destination, false); err != nil { + copier, err := copy.GetCopier(&source, &destination, false) + if err != nil { utils.Error(w, "Something went wrong", http.StatusInternalServerError, err) return } + w.WriteHeader(http.StatusOK) + if err := copier.Copy(); err != nil { + logrus.Errorf("Error during copy: %v", err) + return + } } func handlePut(w http.ResponseWriter, r *http.Request, decoder *schema.Decoder, runtime *libpod.Runtime) { @@ -129,9 +135,14 @@ func handlePut(w http.ResponseWriter, r *http.Request, decoder *schema.Decoder, return } - w.WriteHeader(http.StatusOK) - if err := copy.Copy(&source, &destination, false); err != nil { + copier, err := copy.GetCopier(&source, &destination, false) + if err != nil { utils.Error(w, "Something went wrong", http.StatusInternalServerError, err) return } + w.WriteHeader(http.StatusOK) + if err := copier.Copy(); err != nil { + logrus.Errorf("Error during copy: %v", err) + return + } } diff --git a/pkg/copy/copy.go b/pkg/copy/copy.go index 3993b532e..13893deb2 100644 --- a/pkg/copy/copy.go +++ b/pkg/copy/copy.go @@ -25,31 +25,61 @@ import ( // // **************************************************************************** -// Copy the source item to destination. Use extract to untar the source if -// it's a tar archive. -func Copy(source *CopyItem, destination *CopyItem, extract bool) error { +// Copier copies data from a source to a destination CopyItem. +type Copier struct { + copyFunc func() error + cleanUpFuncs []deferFunc +} + +// cleanUp releases resources the Copier may hold open. +func (c *Copier) cleanUp() { + for _, f := range c.cleanUpFuncs { + f() + } +} + +// Copy data from a source to a destination CopyItem. +func (c *Copier) Copy() error { + defer c.cleanUp() + return c.copyFunc() +} + +// GetCopiers returns a Copier to copy the source item to destination. Use +// extract to untar the source if it's a tar archive. +func GetCopier(source *CopyItem, destination *CopyItem, extract bool) (*Copier, error) { + copier := &Copier{} + // First, do the man-page dance. See podman-cp(1) for details. if err := enforceCopyRules(source, destination); err != nil { - return err + return nil, err } // Destination is a stream (e.g., stdout or an http body). if destination.info.IsStream { // Source is a stream (e.g., stdin or an http body). if source.info.IsStream { - _, err := io.Copy(destination.writer, source.reader) - return err + copier.copyFunc = func() error { + _, err := io.Copy(destination.writer, source.reader) + return err + } + return copier, nil } root, glob, err := source.buildahGlobs() if err != nil { - return err + return nil, err } - return buildahCopiah.Get(root, "", source.getOptions(), []string{glob}, destination.writer) + copier.copyFunc = func() error { + return buildahCopiah.Get(root, "", source.getOptions(), []string{glob}, destination.writer) + } + return copier, nil } // Destination is either a file or a directory. if source.info.IsStream { - return buildahCopiah.Put(destination.root, destination.resolved, source.putOptions(), source.reader) + copier.copyFunc = func() error { + return buildahCopiah.Put(destination.root, destination.resolved, source.putOptions(), source.reader) + } + return copier, nil } tarOptions := &archive.TarOptions{ @@ -71,33 +101,36 @@ func Copy(source *CopyItem, destination *CopyItem, extract bool) error { var tarReader io.ReadCloser if extract && archive.IsArchivePath(source.resolved) { if !destination.info.IsDir { - return errors.Errorf("cannot extract archive %q to file %q", source.original, destination.original) + return nil, errors.Errorf("cannot extract archive %q to file %q", source.original, destination.original) } reader, err := os.Open(source.resolved) if err != nil { - return err + return nil, err } - defer reader.Close() + copier.cleanUpFuncs = append(copier.cleanUpFuncs, func() { reader.Close() }) // The stream from stdin may be compressed (e.g., via gzip). decompressedStream, err := archive.DecompressStream(reader) if err != nil { - return err + return nil, err } - defer decompressedStream.Close() + copier.cleanUpFuncs = append(copier.cleanUpFuncs, func() { decompressedStream.Close() }) tarReader = decompressedStream } else { reader, err := archive.TarWithOptions(source.resolved, tarOptions) if err != nil { - return err + return nil, err } - defer reader.Close() + copier.cleanUpFuncs = append(copier.cleanUpFuncs, func() { reader.Close() }) tarReader = reader } - return buildahCopiah.Put(root, dir, source.putOptions(), tarReader) + copier.copyFunc = func() error { + return buildahCopiah.Put(root, dir, source.putOptions(), tarReader) + } + return copier, nil } // enforceCopyRules enforces the rules for copying from a source to a diff --git a/pkg/domain/infra/abi/cp.go b/pkg/domain/infra/abi/cp.go index 7cc3005c1..362053cce 100644 --- a/pkg/domain/infra/abi/cp.go +++ b/pkg/domain/infra/abi/cp.go @@ -62,5 +62,9 @@ func (ic *ContainerEngine) ContainerCp(ctx context.Context, source, dest string, } // Copy from the host to the container. - return copy.Copy(&sourceItem, &destinationItem, options.Extract) + copier, err := copy.GetCopier(&sourceItem, &destinationItem, options.Extract) + if err != nil { + return err + } + return copier.Copy() } -- cgit v1.2.3-54-g00ecf