distribution/client/client_test.go

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package client
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"net/http/httptest"
"sync"
"testing"
"github.com/docker/distribution/common/testutil"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/manifest"
)
type testBlob struct {
digest digest.Digest
contents []byte
}
func TestPush(t *testing.T) {
name := "hello/world"
tag := "sometag"
testBlobs := []testBlob{
{
digest: "tarsum.v2+sha256:12345",
contents: []byte("some contents"),
},
{
digest: "tarsum.v2+sha256:98765",
contents: []byte("some other contents"),
},
}
uploadLocations := make([]string, len(testBlobs))
blobs := make([]manifest.FSLayer, len(testBlobs))
history := make([]manifest.ManifestHistory, len(testBlobs))
for i, blob := range testBlobs {
// TODO(bbland): this is returning the same location for all uploads,
// because we can't know which blob will get which location.
// It's sort of okay because we're using unique digests, but this needs
// to change at some point.
uploadLocations[i] = fmt.Sprintf("/v2/%s/blobs/test-uuid", name)
blobs[i] = manifest.FSLayer{BlobSum: blob.digest}
history[i] = manifest.ManifestHistory{V1Compatibility: blob.digest.String()}
}
m := &manifest.SignedManifest{
Manifest: manifest.Manifest{
Name: name,
Tag: tag,
Architecture: "x86",
FSLayers: blobs,
History: history,
Versioned: manifest.Versioned{
SchemaVersion: 1,
},
},
}
var err error
m.Raw, err = json.Marshal(m)
blobRequestResponseMappings := make([]testutil.RequestResponseMapping, 2*len(testBlobs))
for i, blob := range testBlobs {
blobRequestResponseMappings[2*i] = testutil.RequestResponseMapping{
Request: testutil.Request{
Method: "POST",
Route: "/v2/" + name + "/blobs/uploads/",
},
Response: testutil.Response{
StatusCode: http.StatusAccepted,
Headers: http.Header(map[string][]string{
"Location": {uploadLocations[i]},
}),
},
}
blobRequestResponseMappings[2*i+1] = testutil.RequestResponseMapping{
Request: testutil.Request{
Method: "PUT",
Route: uploadLocations[i],
QueryParams: map[string][]string{
"digest": {blob.digest.String()},
},
Body: blob.contents,
},
Response: testutil.Response{
StatusCode: http.StatusCreated,
},
}
}
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handler := testutil.NewHandler(append(blobRequestResponseMappings, testutil.RequestResponseMapping{
Request: testutil.Request{
Method: "PUT",
Route: "/v2/" + name + "/manifests/" + tag,
Body: m.Raw,
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},
Response: testutil.Response{
StatusCode: http.StatusOK,
},
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}))
var server *httptest.Server
// HACK(stevvooe): Super hack to follow: the request response map approach
// above does not let us correctly format the location header to the
// server url. This handler intercepts and re-writes the location header
// to the server url.
hack := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w = &headerInterceptingResponseWriter{ResponseWriter: w, serverURL: server.URL}
handler.ServeHTTP(w, r)
})
server = httptest.NewServer(hack)
client, err := New(server.URL)
if err != nil {
t.Fatalf("error creating client: %v", err)
}
objectStore := &memoryObjectStore{
mutex: new(sync.Mutex),
manifestStorage: make(map[string]*manifest.SignedManifest),
layerStorage: make(map[digest.Digest]Layer),
}
for _, blob := range testBlobs {
l, err := objectStore.Layer(blob.digest)
if err != nil {
t.Fatal(err)
}
writer, err := l.Writer()
if err != nil {
t.Fatal(err)
}
writer.SetSize(len(blob.contents))
writer.Write(blob.contents)
writer.Close()
}
objectStore.WriteManifest(name, tag, m)
err = Push(client, objectStore, name, tag)
if err != nil {
t.Fatal(err)
}
}
func TestPull(t *testing.T) {
name := "hello/world"
tag := "sometag"
testBlobs := []testBlob{
{
digest: "tarsum.v2+sha256:12345",
contents: []byte("some contents"),
},
{
digest: "tarsum.v2+sha256:98765",
contents: []byte("some other contents"),
},
}
blobs := make([]manifest.FSLayer, len(testBlobs))
history := make([]manifest.ManifestHistory, len(testBlobs))
for i, blob := range testBlobs {
blobs[i] = manifest.FSLayer{BlobSum: blob.digest}
history[i] = manifest.ManifestHistory{V1Compatibility: blob.digest.String()}
}
m := &manifest.SignedManifest{
Manifest: manifest.Manifest{
Name: name,
Tag: tag,
Architecture: "x86",
FSLayers: blobs,
History: history,
Versioned: manifest.Versioned{
SchemaVersion: 1,
},
},
}
manifestBytes, err := json.Marshal(m)
blobRequestResponseMappings := make([]testutil.RequestResponseMapping, len(testBlobs))
for i, blob := range testBlobs {
blobRequestResponseMappings[i] = testutil.RequestResponseMapping{
Request: testutil.Request{
Method: "GET",
Route: "/v2/" + name + "/blobs/" + blob.digest.String(),
},
Response: testutil.Response{
StatusCode: http.StatusOK,
Body: blob.contents,
},
}
}
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handler := testutil.NewHandler(append(blobRequestResponseMappings, testutil.RequestResponseMapping{
Request: testutil.Request{
Method: "GET",
Route: "/v2/" + name + "/manifests/" + tag,
},
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Response: testutil.Response{
StatusCode: http.StatusOK,
Body: manifestBytes,
},
}))
server := httptest.NewServer(handler)
client, err := New(server.URL)
if err != nil {
t.Fatalf("error creating client: %v", err)
}
objectStore := &memoryObjectStore{
mutex: new(sync.Mutex),
manifestStorage: make(map[string]*manifest.SignedManifest),
layerStorage: make(map[digest.Digest]Layer),
}
err = Pull(client, objectStore, name, tag)
if err != nil {
t.Fatal(err)
}
m, err = objectStore.Manifest(name, tag)
if err != nil {
t.Fatal(err)
}
mBytes, err := json.Marshal(m)
if err != nil {
t.Fatal(err)
}
if string(mBytes) != string(manifestBytes) {
t.Fatal("Incorrect manifest")
}
for _, blob := range testBlobs {
l, err := objectStore.Layer(blob.digest)
if err != nil {
t.Fatal(err)
}
reader, err := l.Reader()
if err != nil {
t.Fatal(err)
}
defer reader.Close()
blobBytes, err := ioutil.ReadAll(reader)
if err != nil {
t.Fatal(err)
}
if string(blobBytes) != string(blob.contents) {
t.Fatal("Incorrect blob")
}
}
}
func TestPullResume(t *testing.T) {
name := "hello/world"
tag := "sometag"
testBlobs := []testBlob{
{
digest: "tarsum.v2+sha256:12345",
contents: []byte("some contents"),
},
{
digest: "tarsum.v2+sha256:98765",
contents: []byte("some other contents"),
},
}
layers := make([]manifest.FSLayer, len(testBlobs))
history := make([]manifest.ManifestHistory, len(testBlobs))
for i, layer := range testBlobs {
layers[i] = manifest.FSLayer{BlobSum: layer.digest}
history[i] = manifest.ManifestHistory{V1Compatibility: layer.digest.String()}
}
m := &manifest.Manifest{
Name: name,
Tag: tag,
Architecture: "x86",
FSLayers: layers,
History: history,
Versioned: manifest.Versioned{
SchemaVersion: 1,
},
}
manifestBytes, err := json.Marshal(m)
layerRequestResponseMappings := make([]testutil.RequestResponseMapping, 2*len(testBlobs))
for i, blob := range testBlobs {
layerRequestResponseMappings[2*i] = testutil.RequestResponseMapping{
Request: testutil.Request{
Method: "GET",
Route: "/v2/" + name + "/blobs/" + blob.digest.String(),
},
Response: testutil.Response{
StatusCode: http.StatusOK,
Body: blob.contents[:len(blob.contents)/2],
Headers: http.Header(map[string][]string{
"Content-Length": {fmt.Sprint(len(blob.contents))},
}),
},
}
layerRequestResponseMappings[2*i+1] = testutil.RequestResponseMapping{
Request: testutil.Request{
Method: "GET",
Route: "/v2/" + name + "/blobs/" + blob.digest.String(),
},
Response: testutil.Response{
StatusCode: http.StatusOK,
Body: blob.contents[len(blob.contents)/2:],
},
}
}
for i := 0; i < 3; i++ {
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layerRequestResponseMappings = append(layerRequestResponseMappings, testutil.RequestResponseMapping{
Request: testutil.Request{
Method: "GET",
Route: "/v2/" + name + "/manifests/" + tag,
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},
Response: testutil.Response{
StatusCode: http.StatusOK,
Body: manifestBytes,
},
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})
}
handler := testutil.NewHandler(layerRequestResponseMappings)
server := httptest.NewServer(handler)
client, err := New(server.URL)
if err != nil {
t.Fatalf("error creating client: %v", err)
}
objectStore := &memoryObjectStore{
mutex: new(sync.Mutex),
manifestStorage: make(map[string]*manifest.SignedManifest),
layerStorage: make(map[digest.Digest]Layer),
}
for attempts := 0; attempts < 3; attempts++ {
err = Pull(client, objectStore, name, tag)
if err == nil {
break
}
}
if err != nil {
t.Fatal(err)
}
sm, err := objectStore.Manifest(name, tag)
if err != nil {
t.Fatal(err)
}
mBytes, err := json.Marshal(sm)
if err != nil {
t.Fatal(err)
}
if string(mBytes) != string(manifestBytes) {
t.Fatal("Incorrect manifest")
}
for _, blob := range testBlobs {
l, err := objectStore.Layer(blob.digest)
if err != nil {
t.Fatal(err)
}
reader, err := l.Reader()
if err != nil {
t.Fatal(err)
}
defer reader.Close()
layerBytes, err := ioutil.ReadAll(reader)
if err != nil {
t.Fatal(err)
}
if string(layerBytes) != string(blob.contents) {
t.Fatal("Incorrect blob")
}
}
}
// headerInterceptingResponseWriter is a hacky workaround to re-write the
// location header to have the server url.
type headerInterceptingResponseWriter struct {
http.ResponseWriter
serverURL string
}
func (hirw *headerInterceptingResponseWriter) WriteHeader(status int) {
location := hirw.Header().Get("Location")
if location != "" {
hirw.Header().Set("Location", hirw.serverURL+location)
}
hirw.ResponseWriter.WriteHeader(status)
}