github.com/olljanat/moby@v1.13.1/api/server/router/container/copy.go (about)

     1  package container
     2  
     3  import (
     4  	"encoding/base64"
     5  	"encoding/json"
     6  	"fmt"
     7  	"io"
     8  	"net/http"
     9  	"os"
    10  	"strings"
    11  
    12  	"github.com/docker/docker/api/server/httputils"
    13  	"github.com/docker/docker/api/types"
    14  	"github.com/docker/docker/api/types/versions"
    15  	"golang.org/x/net/context"
    16  )
    17  
    18  // postContainersCopy is deprecated in favor of getContainersArchive.
    19  func (s *containerRouter) postContainersCopy(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
    20  	// Deprecated since 1.8, Errors out since 1.12
    21  	version := httputils.VersionFromContext(ctx)
    22  	if versions.GreaterThanOrEqualTo(version, "1.24") {
    23  		w.WriteHeader(http.StatusNotFound)
    24  		return nil
    25  	}
    26  	if err := httputils.CheckForJSON(r); err != nil {
    27  		return err
    28  	}
    29  
    30  	cfg := types.CopyConfig{}
    31  	if err := json.NewDecoder(r.Body).Decode(&cfg); err != nil {
    32  		return err
    33  	}
    34  
    35  	if cfg.Resource == "" {
    36  		return fmt.Errorf("Path cannot be empty")
    37  	}
    38  
    39  	data, err := s.backend.ContainerCopy(vars["name"], cfg.Resource)
    40  	if err != nil {
    41  		if strings.Contains(strings.ToLower(err.Error()), "no such container") {
    42  			w.WriteHeader(http.StatusNotFound)
    43  			return nil
    44  		}
    45  		if os.IsNotExist(err) {
    46  			return fmt.Errorf("Could not find the file %s in container %s", cfg.Resource, vars["name"])
    47  		}
    48  		return err
    49  	}
    50  	defer data.Close()
    51  
    52  	w.Header().Set("Content-Type", "application/x-tar")
    53  	if _, err := io.Copy(w, data); err != nil {
    54  		return err
    55  	}
    56  
    57  	return nil
    58  }
    59  
    60  // // Encode the stat to JSON, base64 encode, and place in a header.
    61  func setContainerPathStatHeader(stat *types.ContainerPathStat, header http.Header) error {
    62  	statJSON, err := json.Marshal(stat)
    63  	if err != nil {
    64  		return err
    65  	}
    66  
    67  	header.Set(
    68  		"X-Docker-Container-Path-Stat",
    69  		base64.StdEncoding.EncodeToString(statJSON),
    70  	)
    71  
    72  	return nil
    73  }
    74  
    75  func (s *containerRouter) headContainersArchive(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
    76  	v, err := httputils.ArchiveFormValues(r, vars)
    77  	if err != nil {
    78  		return err
    79  	}
    80  
    81  	stat, err := s.backend.ContainerStatPath(v.Name, v.Path)
    82  	if err != nil {
    83  		return err
    84  	}
    85  
    86  	return setContainerPathStatHeader(stat, w.Header())
    87  }
    88  
    89  func (s *containerRouter) getContainersArchive(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
    90  	v, err := httputils.ArchiveFormValues(r, vars)
    91  	if err != nil {
    92  		return err
    93  	}
    94  
    95  	tarArchive, stat, err := s.backend.ContainerArchivePath(v.Name, v.Path)
    96  	if err != nil {
    97  		return err
    98  	}
    99  	defer tarArchive.Close()
   100  
   101  	if err := setContainerPathStatHeader(stat, w.Header()); err != nil {
   102  		return err
   103  	}
   104  
   105  	w.Header().Set("Content-Type", "application/x-tar")
   106  	_, err = io.Copy(w, tarArchive)
   107  
   108  	return err
   109  }
   110  
   111  func (s *containerRouter) putContainersArchive(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
   112  	v, err := httputils.ArchiveFormValues(r, vars)
   113  	if err != nil {
   114  		return err
   115  	}
   116  
   117  	noOverwriteDirNonDir := httputils.BoolValue(r, "noOverwriteDirNonDir")
   118  	return s.backend.ContainerExtractToDir(v.Name, v.Path, noOverwriteDirNonDir, r.Body)
   119  }