diff --git a/registry/handlers/api_test.go b/registry/handlers/api_test.go index a4091af3..dc5a57ce 100644 --- a/registry/handlers/api_test.go +++ b/registry/handlers/api_test.go @@ -1709,6 +1709,33 @@ func testManifestAPISchema2(t *testing.T, env *testEnv, imageName reference.Name // ------------------ // Fetch by tag name + + // HEAD requests should not contain a body + headReq, err := http.NewRequest(http.MethodHead, manifestURL, nil) + if err != nil { + t.Fatalf("Error constructing request: %s", err) + } + headResp, err := http.DefaultClient.Do(headReq) + if err != nil { + t.Fatalf("unexpected error head manifest: %v", err) + } + defer headResp.Body.Close() + + checkResponse(t, "head uploaded manifest", headResp, http.StatusOK) + checkHeaders(t, headResp, http.Header{ + "Docker-Content-Digest": []string{dgst.String()}, + "ETag": []string{fmt.Sprintf(`"%s"`, dgst)}, + }) + + headBody, err := io.ReadAll(headResp.Body) + if err != nil { + t.Fatalf("reading body for head manifest: %v", err) + } + + if len(headBody) > 0 { + t.Fatalf("unexpected body length for head manifest: %d", len(headBody)) + } + req, err := http.NewRequest(http.MethodGet, manifestURL, nil) if err != nil { t.Fatalf("Error constructing request: %s", err) @@ -1744,6 +1771,32 @@ func testManifestAPISchema2(t *testing.T, env *testEnv, imageName reference.Name // --------------- // Fetch by digest + + // HEAD requests should not contain a body + headReq, err = http.NewRequest(http.MethodHead, manifestDigestURL, nil) + if err != nil { + t.Fatalf("Error constructing request: %s", err) + } + headResp, err = http.DefaultClient.Do(headReq) + if err != nil { + t.Fatalf("unexpected error head manifest: %v", err) + } + defer headResp.Body.Close() + + checkResponse(t, "head uploaded manifest by digest", headResp, http.StatusOK) + checkHeaders(t, headResp, http.Header{ + "Docker-Content-Digest": []string{dgst.String()}, + "ETag": []string{fmt.Sprintf(`"%s"`, dgst)}, + }) + + headBody, err = io.ReadAll(headResp.Body) + if err != nil { + t.Fatalf("reading body for head manifest by digest: %v", err) + } + + if len(headBody) > 0 { + t.Fatalf("unexpected body length for head manifest: %d", len(headBody)) + } req, err = http.NewRequest(http.MethodGet, manifestDigestURL, nil) if err != nil { t.Fatalf("Error constructing request: %s", err) @@ -2543,6 +2596,8 @@ func maybeDumpResponse(t *testing.T, resp *http.Response) { // test will fail. If a passed in header value is "*", any non-zero value will // suffice as a match. func checkHeaders(t *testing.T, resp *http.Response, headers http.Header) { + t.Helper() + for k, vs := range headers { if resp.Header.Get(k) == "" { t.Fatalf("response missing header %q", k) diff --git a/registry/handlers/manifests.go b/registry/handlers/manifests.go index 0778db3f..704a8ab7 100644 --- a/registry/handlers/manifests.go +++ b/registry/handlers/manifests.go @@ -212,6 +212,11 @@ func (imh *manifestHandler) GetManifest(w http.ResponseWriter, r *http.Request) w.Header().Set("Content-Length", fmt.Sprint(len(p))) w.Header().Set("Docker-Content-Digest", imh.Digest.String()) w.Header().Set("Etag", fmt.Sprintf(`"%s"`, imh.Digest)) + + if r.Method == http.MethodHead { + return + } + if _, err := w.Write(p); err != nil { w.WriteHeader(http.StatusInternalServerError) }