A container registry that uses the AT Protocol for manifest storage and S3 for blob storage.
atcr.io
docker
container
atproto
go
fix pushing and pulling from docker
+146
-137
+58
-67
pkg/appview/storage/proxy_blob_store.go
+58
-67
pkg/appview/storage/proxy_blob_store.go
···
222
222
return distribution.Descriptor{}, err
223
223
}
224
224
225
-
// Get presigned HEAD URL
226
-
url, err := p.getHeadURL(ctx, dgst)
225
+
method := "HEAD"
226
+
227
+
url, err := p.getPresignedURL(ctx, method, dgst)
227
228
if err != nil {
228
229
return distribution.Descriptor{}, distribution.ErrBlobUnknown
229
230
}
230
231
231
-
// Make HEAD request with service token authentication
232
-
req, err := http.NewRequestWithContext(ctx, "HEAD", url, nil)
232
+
// Make HEAD request to presigned URL
233
+
req, err := http.NewRequestWithContext(ctx, method, url, nil)
233
234
if err != nil {
234
235
return distribution.Descriptor{}, distribution.ErrBlobUnknown
235
236
}
236
237
237
-
resp, err := p.doAuthenticatedRequest(ctx, req)
238
+
// Go directly to the presigned URL, no need to authenticate
239
+
resp, err := p.httpClient.Do(req)
238
240
if err != nil {
239
241
return distribution.Descriptor{}, distribution.ErrBlobUnknown
240
242
}
···
264
266
return nil, err
265
267
}
266
268
267
-
url, err := p.getDownloadURL(ctx, dgst)
269
+
method := "GET"
270
+
271
+
url, err := p.getPresignedURL(ctx, method, dgst)
268
272
if err != nil {
269
273
return nil, err
270
274
}
271
275
272
-
// Download the blob
273
-
resp, err := http.Get(url)
276
+
// Download the blob with service token authentication
277
+
req, err := http.NewRequestWithContext(ctx, method, url, nil)
274
278
if err != nil {
275
279
return nil, err
276
280
}
281
+
282
+
resp, err := p.doAuthenticatedRequest(ctx, req)
283
+
if err != nil {
284
+
return nil, err
285
+
}
286
+
277
287
defer resp.Body.Close()
278
288
279
289
if resp.StatusCode != http.StatusOK {
···
290
300
return nil, err
291
301
}
292
302
293
-
url, err := p.getDownloadURL(ctx, dgst)
303
+
method := "GET"
304
+
305
+
url, err := p.getPresignedURL(ctx, method, dgst)
294
306
if err != nil {
295
307
return nil, err
296
308
}
297
309
298
310
// Download the blob with service token authentication
299
-
req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
311
+
req, err := http.NewRequestWithContext(ctx, method, url, nil)
300
312
if err != nil {
301
313
return nil, err
302
314
}
···
370
382
return err
371
383
}
372
384
373
-
// For HEAD requests, proxy the response instead of redirecting
374
-
// This avoids authentication issues when client follows redirects
375
-
if r.Method == http.MethodHead {
376
-
url, err := p.getHeadURL(ctx, dgst)
377
-
if err != nil {
378
-
return err
379
-
}
380
-
381
-
// Make authenticated HEAD request to hold service
382
-
req, err := http.NewRequestWithContext(ctx, "HEAD", url, nil)
383
-
if err != nil {
384
-
return err
385
-
}
386
-
387
-
resp, err := p.doAuthenticatedRequest(ctx, req)
388
-
if err != nil {
389
-
return err
390
-
}
391
-
defer resp.Body.Close()
392
-
393
-
if resp.StatusCode != http.StatusOK {
394
-
return fmt.Errorf("blob not found")
395
-
}
396
-
397
-
// Copy response headers
398
-
if contentLength := resp.Header.Get("Content-Length"); contentLength != "" {
399
-
w.Header().Set("Content-Length", contentLength)
400
-
}
401
-
if contentType := resp.Header.Get("Content-Type"); contentType != "" {
402
-
w.Header().Set("Content-Type", contentType)
403
-
}
404
-
if etag := resp.Header.Get("ETag"); etag != "" {
405
-
w.Header().Set("ETag", etag)
406
-
}
407
-
408
-
w.WriteHeader(http.StatusOK)
409
-
return nil
410
-
}
411
-
412
-
// For GET requests, redirect to presigned URL for direct download
413
-
url, err := p.getDownloadURL(ctx, dgst)
385
+
url, err := p.getPresignedURL(ctx, r.Method, dgst)
414
386
if err != nil {
415
387
return err
416
388
}
···
483
455
return writer, nil
484
456
}
485
457
486
-
// getDownloadURL returns the XRPC getBlob URL for downloading a blob
487
-
// The hold service will redirect to a presigned S3 URL
488
-
func (p *ProxyBlobStore) getDownloadURL(ctx context.Context, dgst digest.Digest) (string, error) {
489
-
// Use XRPC endpoint: GET /xrpc/com.atproto.sync.getBlob?did={userDID}&cid={digest}
458
+
// getPresignedURL returns the XRPC endpoint URL for blob operations
459
+
func (p *ProxyBlobStore) getPresignedURL(ctx context.Context, operation string, dgst digest.Digest) (string, error) {
460
+
// Use XRPC endpoint: /xrpc/com.atproto.sync.getBlob?did={userDID}&cid={digest}
490
461
// The 'did' parameter is the USER's DID (whose blob we're fetching), not the hold service DID
491
462
// Per migration doc: hold accepts OCI digest directly as cid parameter (checks for sha256: prefix)
492
-
url := fmt.Sprintf("%s/xrpc/com.atproto.sync.getBlob?did=%s&cid=%s",
493
-
p.holdURL, p.ctx.DID, dgst.String())
494
-
return url, nil
495
-
}
463
+
xrpcURL := fmt.Sprintf("%s/xrpc/com.atproto.sync.getBlob?did=%s&cid=%s&method=%s",
464
+
p.holdURL, p.ctx.DID, dgst.String(), operation)
465
+
466
+
req, err := http.NewRequestWithContext(ctx, "GET", xrpcURL, nil)
467
+
if err != nil {
468
+
return "", fmt.Errorf("failed to create request: %w", err)
469
+
}
470
+
471
+
resp, err := p.doAuthenticatedRequest(ctx, req)
472
+
if err != nil {
473
+
return "", fmt.Errorf("failed to call hold service: %w", err)
474
+
}
475
+
defer resp.Body.Close()
476
+
477
+
if resp.StatusCode != http.StatusOK {
478
+
bodyBytes, _ := io.ReadAll(resp.Body)
479
+
return "", fmt.Errorf("hold service returned error: status %d, body: %s", resp.StatusCode, string(bodyBytes))
480
+
}
481
+
482
+
// Parse JSON response to get presigned HEAD URL
483
+
var result struct {
484
+
URL string `json:"url"`
485
+
}
486
+
if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
487
+
return "", fmt.Errorf("failed to parse hold service response: %w", err)
488
+
}
489
+
490
+
if result.URL == "" {
491
+
return "", fmt.Errorf("hold service returned empty URL")
492
+
}
496
493
497
-
// getHeadURL returns the XRPC getBlob URL for HEAD requests
498
-
// The hold service will redirect to a presigned S3 URL
499
-
func (p *ProxyBlobStore) getHeadURL(ctx context.Context, dgst digest.Digest) (string, error) {
500
-
// Same as GET - hold service handles HEAD method on getBlob endpoint
501
-
// The 'did' parameter is the USER's DID (whose blob we're checking), not the hold service DID
502
-
url := fmt.Sprintf("%s/xrpc/com.atproto.sync.getBlob?did=%s&cid=%s",
503
-
p.holdURL, p.ctx.DID, dgst.String())
504
-
return url, nil
494
+
fmt.Printf("DEBUG [proxy_blob_store]: Got presigned HEAD URL from hold service: %s\n", result.URL)
495
+
return result.URL, nil
505
496
}
506
497
507
498
// startMultipartUpload initiates a multipart upload via XRPC uploadBlob endpoint
+23
-49
pkg/hold/pds/xrpc.go
+23
-49
pkg/hold/pds/xrpc.go
···
978
978
digest = cidOrDigest
979
979
}
980
980
981
-
// Handle HEAD vs GET differently - they need different presigned URLs
982
-
if r.Method == http.MethodHead {
983
-
// For HEAD requests: generate HEAD presigned URL and proxy to S3
984
-
// AppView expects 200 OK with Content-Length, not a redirect
985
-
// Note: HEAD presigned URLs have different signatures than GET URLs
986
-
987
-
headURL, err := h.blobStore.GetPresignedURL("HEAD", digest, did) // TODO: Add GetPresignedHeadURL method
988
-
if err != nil {
989
-
log.Printf("[HandleGetBlob] Failed to get presigned HEAD URL: digest=%s, did=%s, err=%v", digest, did, err)
990
-
http.Error(w, "blob not found", http.StatusNotFound)
991
-
return
992
-
}
993
-
994
-
log.Printf("[HandleGetBlob] Proxying HEAD request to: %s", headURL)
995
-
996
-
headResp, err := http.Head(headURL)
997
-
if err != nil {
998
-
log.Printf("[HandleGetBlob] HEAD request failed: %v", err)
999
-
http.Error(w, "blob not found", http.StatusNotFound)
1000
-
return
1001
-
}
1002
-
defer headResp.Body.Close()
1003
-
1004
-
if headResp.StatusCode != http.StatusOK {
1005
-
log.Printf("[HandleGetBlob] HEAD request returned non-200: %d", headResp.StatusCode)
1006
-
http.Error(w, "blob not found", http.StatusNotFound)
1007
-
return
981
+
// Determine presigned URL operation
982
+
// Check for ?method=HEAD query parameter first (from AppView), then fall back to request method
983
+
// HEAD and GET need different presigned URL signatures
984
+
operation := r.URL.Query().Get("method")
985
+
if operation == "" {
986
+
operation = "GET"
987
+
if r.Method == http.MethodHead {
988
+
operation = "HEAD"
1008
989
}
990
+
}
1009
991
1010
-
// Copy relevant headers from S3 response
1011
-
if contentLength := headResp.Header.Get("Content-Length"); contentLength != "" {
1012
-
w.Header().Set("Content-Length", contentLength)
1013
-
}
1014
-
if contentType := headResp.Header.Get("Content-Type"); contentType != "" {
1015
-
w.Header().Set("Content-Type", contentType)
1016
-
}
1017
-
if etag := headResp.Header.Get("ETag"); etag != "" {
1018
-
w.Header().Set("ETag", etag)
1019
-
}
992
+
// Generate presigned URL for the operation
993
+
presignedURL, err := h.blobStore.GetPresignedURL(operation, digest, did)
994
+
if err != nil {
995
+
log.Printf("[HandleGetBlob] Failed to get presigned %s URL: digest=%s, did=%s, err=%v", operation, digest, did, err)
996
+
http.Error(w, "failed to get presigned URL", http.StatusInternalServerError)
997
+
return
998
+
}
1020
999
1021
-
log.Printf("[HandleGetBlob] HEAD request successful, Content-Length: %s", headResp.Header.Get("Content-Length"))
1022
-
w.WriteHeader(http.StatusOK)
1023
-
} else {
1024
-
// For GET requests: generate GET presigned URL and redirect for direct download from S3
1025
-
downloadURL, err := h.blobStore.GetPresignedURL("GET", digest, did)
1026
-
if err != nil {
1027
-
log.Printf("[HandleGetBlob] Failed to get presigned GET URL: digest=%s, did=%s, err=%v", digest, did, err)
1028
-
http.Error(w, "failed to get download URL", http.StatusInternalServerError)
1029
-
return
1030
-
}
1000
+
log.Printf("[HandleGetBlob] Returning presigned %s URL: %s", operation, presignedURL)
1031
1001
1032
-
log.Printf("[HandleGetBlob] Redirecting GET request to presigned URL: %s", downloadURL)
1033
-
http.Redirect(w, r, downloadURL, http.StatusTemporaryRedirect)
1002
+
// Return JSON response with the presigned URL
1003
+
// AppView will either redirect (GET) or proxy (HEAD) using this URL
1004
+
response := map[string]string{
1005
+
"url": presignedURL,
1034
1006
}
1007
+
w.Header().Set("Content-Type", "application/json")
1008
+
json.NewEncoder(w).Encode(response)
1035
1009
}
1036
1010
1037
1011
// HandleListRepos lists all repositories in this PDS
+65
-21
pkg/hold/pds/xrpc_test.go
+65
-21
pkg/hold/pds/xrpc_test.go
···
1386
1386
}
1387
1387
1388
1388
func (m *mockBlobStore) GetPresignedURL(operation, digest, did string) (string, error) {
1389
-
if operation == "GET" {
1389
+
if operation == "GET" || operation == "HEAD" {
1390
+
// Both GET and HEAD are download operations, just different HTTP methods
1390
1391
m.downloadCalls = append(m.downloadCalls, digest)
1391
1392
if m.downloadURLError != nil {
1392
1393
return "", m.downloadURLError
···
1395
1396
return "https://s3.example.com/download/" + digest, nil
1396
1397
}
1397
1398
1399
+
// PUT or other upload operations
1398
1400
m.uploadCalls = append(m.uploadCalls, digest)
1399
1401
if m.uploadURLError != nil {
1400
1402
return "", m.uploadURLError
···
1680
1682
1681
1683
handler.HandleGetBlob(w, req)
1682
1684
1683
-
// Should redirect to presigned download URL (307 Temporary Redirect)
1684
-
if w.Code != http.StatusTemporaryRedirect {
1685
-
t.Errorf("Expected status 307 (Temporary Redirect), got %d", w.Code)
1685
+
// Should return 200 OK with JSON response containing presigned URL
1686
+
if w.Code != http.StatusOK {
1687
+
t.Errorf("Expected status 200 OK, got %d", w.Code)
1688
+
}
1689
+
1690
+
// Verify Content-Type is JSON
1691
+
contentType := w.Header().Get("Content-Type")
1692
+
if contentType != "application/json" {
1693
+
t.Errorf("Expected Content-Type application/json, got %s", contentType)
1694
+
}
1695
+
1696
+
// Parse JSON response
1697
+
var response map[string]string
1698
+
if err := json.Unmarshal(w.Body.Bytes(), &response); err != nil {
1699
+
t.Fatalf("Failed to parse JSON response: %v", err)
1686
1700
}
1687
1701
1688
-
location := w.Header().Get("Location")
1702
+
// Verify URL field exists
1689
1703
expectedURL := "https://s3.example.com/download/" + cid
1690
-
if location != expectedURL {
1691
-
t.Errorf("Expected redirect to %s, got %s", expectedURL, location)
1704
+
if response["url"] != expectedURL {
1705
+
t.Errorf("Expected url to be %s, got %s", expectedURL, response["url"])
1692
1706
}
1693
1707
1694
1708
// Verify blob store was called
1695
1709
if len(blobStore.downloadCalls) != 1 || blobStore.downloadCalls[0] != cid {
1696
-
t.Errorf("Expected GetPresignedDownloadURL to be called with %s", cid)
1710
+
t.Errorf("Expected GetPresignedURL to be called with %s", cid)
1697
1711
}
1698
1712
}
1699
1713
···
1713
1727
1714
1728
handler.HandleGetBlob(w, req)
1715
1729
1716
-
// Should redirect to presigned download URL
1717
-
if w.Code != http.StatusTemporaryRedirect {
1718
-
t.Errorf("Expected status 307, got %d", w.Code)
1730
+
// Should return 200 OK with JSON response
1731
+
if w.Code != http.StatusOK {
1732
+
t.Errorf("Expected status 200 OK, got %d", w.Code)
1733
+
}
1734
+
1735
+
// Parse JSON response
1736
+
var response map[string]string
1737
+
if err := json.Unmarshal(w.Body.Bytes(), &response); err != nil {
1738
+
t.Fatalf("Failed to parse JSON response: %v", err)
1739
+
}
1740
+
1741
+
// Verify URL field exists
1742
+
if response["url"] == "" {
1743
+
t.Errorf("Expected url field in response, got empty")
1719
1744
}
1720
1745
1721
1746
// Verify blob store received the sha256 digest
1722
1747
if len(blobStore.downloadCalls) != 1 || blobStore.downloadCalls[0] != digest {
1723
-
t.Errorf("Expected GetPresignedDownloadURL to be called with %s, got %v", digest, blobStore.downloadCalls)
1748
+
t.Errorf("Expected GetPresignedURL to be called with %s, got %v", digest, blobStore.downloadCalls)
1724
1749
}
1725
1750
}
1726
1751
1727
1752
// TestHandleGetBlob_HeadMethod tests HEAD request support
1728
-
// HEAD requests are proxied (not redirected) to avoid S3 presigned URL signature issues
1729
-
// The hold service makes the HEAD request itself and returns 200 OK with headers
1753
+
// HEAD requests now return JSON with presigned HEAD URL (same as GET)
1754
+
// AppView is responsible for making the actual HEAD request to S3
1730
1755
// Spec: https://docs.bsky.app/docs/api/com-atproto-sync-get-blob
1731
1756
func TestHandleGetBlob_HeadMethod(t *testing.T) {
1732
-
handler, _, _ := setupTestXRPCHandlerWithBlobs(t)
1757
+
handler, blobStore, _ := setupTestXRPCHandlerWithBlobs(t)
1733
1758
1734
1759
holdDID := "did:web:hold.example.com"
1735
1760
cid := "bafyreib2rxk3rkhh5ylyxj3x3gathxt3s32qvwj2lf3qg4kmzr6b7teqke"
···
1740
1765
1741
1766
handler.HandleGetBlob(w, req)
1742
1767
1743
-
// HEAD requests are now proxied - the handler makes an HTTP HEAD to the presigned URL
1744
-
// In the test environment, this will fail because the mock returns a fake URL
1745
-
// Expect 404 because the handler couldn't reach the mock S3 URL
1746
-
if w.Code != http.StatusNotFound {
1747
-
t.Errorf("Expected status 404 (mock S3 unreachable), got %d", w.Code)
1768
+
// Should return 200 OK with JSON response containing presigned HEAD URL
1769
+
if w.Code != http.StatusOK {
1770
+
t.Errorf("Expected status 200 OK, got %d", w.Code)
1771
+
}
1772
+
1773
+
// Verify Content-Type is JSON
1774
+
contentType := w.Header().Get("Content-Type")
1775
+
if contentType != "application/json" {
1776
+
t.Errorf("Expected Content-Type application/json, got %s", contentType)
1777
+
}
1778
+
1779
+
// Parse JSON response
1780
+
var response map[string]string
1781
+
if err := json.Unmarshal(w.Body.Bytes(), &response); err != nil {
1782
+
t.Fatalf("Failed to parse JSON response: %v", err)
1748
1783
}
1749
1784
1750
-
// Note: In production with real S3, HEAD would return 200 OK with Content-Length header
1785
+
// Verify URL field exists
1786
+
expectedURL := "https://s3.example.com/download/" + cid
1787
+
if response["url"] != expectedURL {
1788
+
t.Errorf("Expected url to be %s, got %s", expectedURL, response["url"])
1789
+
}
1790
+
1791
+
// Verify blob store was called with HEAD operation
1792
+
if len(blobStore.downloadCalls) != 1 || blobStore.downloadCalls[0] != cid {
1793
+
t.Errorf("Expected GetPresignedURL to be called with %s", cid)
1794
+
}
1751
1795
}
1752
1796
1753
1797
// TestHandleGetBlob_MissingParameters tests missing required parameters