github.com/duglin/docker@v1.13.1/registry/session.go (about) 1 package registry 2 3 import ( 4 "bytes" 5 "crypto/sha256" 6 "errors" 7 "sync" 8 // this is required for some certificates 9 _ "crypto/sha512" 10 "encoding/hex" 11 "encoding/json" 12 "fmt" 13 "io" 14 "io/ioutil" 15 "net/http" 16 "net/http/cookiejar" 17 "net/url" 18 "strconv" 19 "strings" 20 21 "github.com/Sirupsen/logrus" 22 "github.com/docker/distribution/registry/api/errcode" 23 "github.com/docker/docker/api/types" 24 registrytypes "github.com/docker/docker/api/types/registry" 25 "github.com/docker/docker/pkg/httputils" 26 "github.com/docker/docker/pkg/ioutils" 27 "github.com/docker/docker/pkg/stringid" 28 "github.com/docker/docker/pkg/tarsum" 29 "github.com/docker/docker/reference" 30 ) 31 32 var ( 33 // ErrRepoNotFound is returned if the repository didn't exist on the 34 // remote side 35 ErrRepoNotFound = errors.New("Repository not found") 36 ) 37 38 // A Session is used to communicate with a V1 registry 39 type Session struct { 40 indexEndpoint *V1Endpoint 41 client *http.Client 42 // TODO(tiborvass): remove authConfig 43 authConfig *types.AuthConfig 44 id string 45 } 46 47 type authTransport struct { 48 http.RoundTripper 49 *types.AuthConfig 50 51 alwaysSetBasicAuth bool 52 token []string 53 54 mu sync.Mutex // guards modReq 55 modReq map[*http.Request]*http.Request // original -> modified 56 } 57 58 // AuthTransport handles the auth layer when communicating with a v1 registry (private or official) 59 // 60 // For private v1 registries, set alwaysSetBasicAuth to true. 61 // 62 // For the official v1 registry, if there isn't already an Authorization header in the request, 63 // but there is an X-Docker-Token header set to true, then Basic Auth will be used to set the Authorization header. 64 // After sending the request with the provided base http.RoundTripper, if an X-Docker-Token header, representing 65 // a token, is present in the response, then it gets cached and sent in the Authorization header of all subsequent 66 // requests. 67 // 68 // If the server sends a token without the client having requested it, it is ignored. 69 // 70 // This RoundTripper also has a CancelRequest method important for correct timeout handling. 71 func AuthTransport(base http.RoundTripper, authConfig *types.AuthConfig, alwaysSetBasicAuth bool) http.RoundTripper { 72 if base == nil { 73 base = http.DefaultTransport 74 } 75 return &authTransport{ 76 RoundTripper: base, 77 AuthConfig: authConfig, 78 alwaysSetBasicAuth: alwaysSetBasicAuth, 79 modReq: make(map[*http.Request]*http.Request), 80 } 81 } 82 83 // cloneRequest returns a clone of the provided *http.Request. 84 // The clone is a shallow copy of the struct and its Header map. 85 func cloneRequest(r *http.Request) *http.Request { 86 // shallow copy of the struct 87 r2 := new(http.Request) 88 *r2 = *r 89 // deep copy of the Header 90 r2.Header = make(http.Header, len(r.Header)) 91 for k, s := range r.Header { 92 r2.Header[k] = append([]string(nil), s...) 93 } 94 95 return r2 96 } 97 98 // RoundTrip changes an HTTP request's headers to add the necessary 99 // authentication-related headers 100 func (tr *authTransport) RoundTrip(orig *http.Request) (*http.Response, error) { 101 // Authorization should not be set on 302 redirect for untrusted locations. 102 // This logic mirrors the behavior in addRequiredHeadersToRedirectedRequests. 103 // As the authorization logic is currently implemented in RoundTrip, 104 // a 302 redirect is detected by looking at the Referrer header as go http package adds said header. 105 // This is safe as Docker doesn't set Referrer in other scenarios. 106 if orig.Header.Get("Referer") != "" && !trustedLocation(orig) { 107 return tr.RoundTripper.RoundTrip(orig) 108 } 109 110 req := cloneRequest(orig) 111 tr.mu.Lock() 112 tr.modReq[orig] = req 113 tr.mu.Unlock() 114 115 if tr.alwaysSetBasicAuth { 116 if tr.AuthConfig == nil { 117 return nil, errors.New("unexpected error: empty auth config") 118 } 119 req.SetBasicAuth(tr.Username, tr.Password) 120 return tr.RoundTripper.RoundTrip(req) 121 } 122 123 // Don't override 124 if req.Header.Get("Authorization") == "" { 125 if req.Header.Get("X-Docker-Token") == "true" && tr.AuthConfig != nil && len(tr.Username) > 0 { 126 req.SetBasicAuth(tr.Username, tr.Password) 127 } else if len(tr.token) > 0 { 128 req.Header.Set("Authorization", "Token "+strings.Join(tr.token, ",")) 129 } 130 } 131 resp, err := tr.RoundTripper.RoundTrip(req) 132 if err != nil { 133 delete(tr.modReq, orig) 134 return nil, err 135 } 136 if len(resp.Header["X-Docker-Token"]) > 0 { 137 tr.token = resp.Header["X-Docker-Token"] 138 } 139 resp.Body = &ioutils.OnEOFReader{ 140 Rc: resp.Body, 141 Fn: func() { 142 tr.mu.Lock() 143 delete(tr.modReq, orig) 144 tr.mu.Unlock() 145 }, 146 } 147 return resp, nil 148 } 149 150 // CancelRequest cancels an in-flight request by closing its connection. 151 func (tr *authTransport) CancelRequest(req *http.Request) { 152 type canceler interface { 153 CancelRequest(*http.Request) 154 } 155 if cr, ok := tr.RoundTripper.(canceler); ok { 156 tr.mu.Lock() 157 modReq := tr.modReq[req] 158 delete(tr.modReq, req) 159 tr.mu.Unlock() 160 cr.CancelRequest(modReq) 161 } 162 } 163 164 func authorizeClient(client *http.Client, authConfig *types.AuthConfig, endpoint *V1Endpoint) error { 165 var alwaysSetBasicAuth bool 166 167 // If we're working with a standalone private registry over HTTPS, send Basic Auth headers 168 // alongside all our requests. 169 if endpoint.String() != IndexServer && endpoint.URL.Scheme == "https" { 170 info, err := endpoint.Ping() 171 if err != nil { 172 return err 173 } 174 if info.Standalone && authConfig != nil { 175 logrus.Debugf("Endpoint %s is eligible for private registry. Enabling decorator.", endpoint.String()) 176 alwaysSetBasicAuth = true 177 } 178 } 179 180 // Annotate the transport unconditionally so that v2 can 181 // properly fallback on v1 when an image is not found. 182 client.Transport = AuthTransport(client.Transport, authConfig, alwaysSetBasicAuth) 183 184 jar, err := cookiejar.New(nil) 185 if err != nil { 186 return errors.New("cookiejar.New is not supposed to return an error") 187 } 188 client.Jar = jar 189 190 return nil 191 } 192 193 func newSession(client *http.Client, authConfig *types.AuthConfig, endpoint *V1Endpoint) *Session { 194 return &Session{ 195 authConfig: authConfig, 196 client: client, 197 indexEndpoint: endpoint, 198 id: stringid.GenerateRandomID(), 199 } 200 } 201 202 // NewSession creates a new session 203 // TODO(tiborvass): remove authConfig param once registry client v2 is vendored 204 func NewSession(client *http.Client, authConfig *types.AuthConfig, endpoint *V1Endpoint) (*Session, error) { 205 if err := authorizeClient(client, authConfig, endpoint); err != nil { 206 return nil, err 207 } 208 209 return newSession(client, authConfig, endpoint), nil 210 } 211 212 // ID returns this registry session's ID. 213 func (r *Session) ID() string { 214 return r.id 215 } 216 217 // GetRemoteHistory retrieves the history of a given image from the registry. 218 // It returns a list of the parent's JSON files (including the requested image). 219 func (r *Session) GetRemoteHistory(imgID, registry string) ([]string, error) { 220 res, err := r.client.Get(registry + "images/" + imgID + "/ancestry") 221 if err != nil { 222 return nil, err 223 } 224 defer res.Body.Close() 225 if res.StatusCode != 200 { 226 if res.StatusCode == 401 { 227 return nil, errcode.ErrorCodeUnauthorized.WithArgs() 228 } 229 return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to fetch remote history for %s", res.StatusCode, imgID), res) 230 } 231 232 var history []string 233 if err := json.NewDecoder(res.Body).Decode(&history); err != nil { 234 return nil, fmt.Errorf("Error while reading the http response: %v", err) 235 } 236 237 logrus.Debugf("Ancestry: %v", history) 238 return history, nil 239 } 240 241 // LookupRemoteImage checks if an image exists in the registry 242 func (r *Session) LookupRemoteImage(imgID, registry string) error { 243 res, err := r.client.Get(registry + "images/" + imgID + "/json") 244 if err != nil { 245 return err 246 } 247 res.Body.Close() 248 if res.StatusCode != 200 { 249 return httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d", res.StatusCode), res) 250 } 251 return nil 252 } 253 254 // GetRemoteImageJSON retrieves an image's JSON metadata from the registry. 255 func (r *Session) GetRemoteImageJSON(imgID, registry string) ([]byte, int64, error) { 256 res, err := r.client.Get(registry + "images/" + imgID + "/json") 257 if err != nil { 258 return nil, -1, fmt.Errorf("Failed to download json: %s", err) 259 } 260 defer res.Body.Close() 261 if res.StatusCode != 200 { 262 return nil, -1, httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d", res.StatusCode), res) 263 } 264 // if the size header is not present, then set it to '-1' 265 imageSize := int64(-1) 266 if hdr := res.Header.Get("X-Docker-Size"); hdr != "" { 267 imageSize, err = strconv.ParseInt(hdr, 10, 64) 268 if err != nil { 269 return nil, -1, err 270 } 271 } 272 273 jsonString, err := ioutil.ReadAll(res.Body) 274 if err != nil { 275 return nil, -1, fmt.Errorf("Failed to parse downloaded json: %v (%s)", err, jsonString) 276 } 277 return jsonString, imageSize, nil 278 } 279 280 // GetRemoteImageLayer retrieves an image layer from the registry 281 func (r *Session) GetRemoteImageLayer(imgID, registry string, imgSize int64) (io.ReadCloser, error) { 282 var ( 283 statusCode = 0 284 res *http.Response 285 err error 286 imageURL = fmt.Sprintf("%simages/%s/layer", registry, imgID) 287 ) 288 289 req, err := http.NewRequest("GET", imageURL, nil) 290 if err != nil { 291 return nil, fmt.Errorf("Error while getting from the server: %v", err) 292 } 293 statusCode = 0 294 res, err = r.client.Do(req) 295 if err != nil { 296 logrus.Debugf("Error contacting registry %s: %v", registry, err) 297 // the only case err != nil && res != nil is https://golang.org/src/net/http/client.go#L515 298 if res != nil { 299 if res.Body != nil { 300 res.Body.Close() 301 } 302 statusCode = res.StatusCode 303 } 304 return nil, fmt.Errorf("Server error: Status %d while fetching image layer (%s)", 305 statusCode, imgID) 306 } 307 308 if res.StatusCode != 200 { 309 res.Body.Close() 310 return nil, fmt.Errorf("Server error: Status %d while fetching image layer (%s)", 311 res.StatusCode, imgID) 312 } 313 314 if res.Header.Get("Accept-Ranges") == "bytes" && imgSize > 0 { 315 logrus.Debug("server supports resume") 316 return httputils.ResumableRequestReaderWithInitialResponse(r.client, req, 5, imgSize, res), nil 317 } 318 logrus.Debug("server doesn't support resume") 319 return res.Body, nil 320 } 321 322 // GetRemoteTag retrieves the tag named in the askedTag argument from the given 323 // repository. It queries each of the registries supplied in the registries 324 // argument, and returns data from the first one that answers the query 325 // successfully. 326 func (r *Session) GetRemoteTag(registries []string, repositoryRef reference.Named, askedTag string) (string, error) { 327 repository := repositoryRef.RemoteName() 328 329 if strings.Count(repository, "/") == 0 { 330 // This will be removed once the registry supports auto-resolution on 331 // the "library" namespace 332 repository = "library/" + repository 333 } 334 for _, host := range registries { 335 endpoint := fmt.Sprintf("%srepositories/%s/tags/%s", host, repository, askedTag) 336 res, err := r.client.Get(endpoint) 337 if err != nil { 338 return "", err 339 } 340 341 logrus.Debugf("Got status code %d from %s", res.StatusCode, endpoint) 342 defer res.Body.Close() 343 344 if res.StatusCode == 404 { 345 return "", ErrRepoNotFound 346 } 347 if res.StatusCode != 200 { 348 continue 349 } 350 351 var tagID string 352 if err := json.NewDecoder(res.Body).Decode(&tagID); err != nil { 353 return "", err 354 } 355 return tagID, nil 356 } 357 return "", fmt.Errorf("Could not reach any registry endpoint") 358 } 359 360 // GetRemoteTags retrieves all tags from the given repository. It queries each 361 // of the registries supplied in the registries argument, and returns data from 362 // the first one that answers the query successfully. It returns a map with 363 // tag names as the keys and image IDs as the values. 364 func (r *Session) GetRemoteTags(registries []string, repositoryRef reference.Named) (map[string]string, error) { 365 repository := repositoryRef.RemoteName() 366 367 if strings.Count(repository, "/") == 0 { 368 // This will be removed once the registry supports auto-resolution on 369 // the "library" namespace 370 repository = "library/" + repository 371 } 372 for _, host := range registries { 373 endpoint := fmt.Sprintf("%srepositories/%s/tags", host, repository) 374 res, err := r.client.Get(endpoint) 375 if err != nil { 376 return nil, err 377 } 378 379 logrus.Debugf("Got status code %d from %s", res.StatusCode, endpoint) 380 defer res.Body.Close() 381 382 if res.StatusCode == 404 { 383 return nil, ErrRepoNotFound 384 } 385 if res.StatusCode != 200 { 386 continue 387 } 388 389 result := make(map[string]string) 390 if err := json.NewDecoder(res.Body).Decode(&result); err != nil { 391 return nil, err 392 } 393 return result, nil 394 } 395 return nil, fmt.Errorf("Could not reach any registry endpoint") 396 } 397 398 func buildEndpointsList(headers []string, indexEp string) ([]string, error) { 399 var endpoints []string 400 parsedURL, err := url.Parse(indexEp) 401 if err != nil { 402 return nil, err 403 } 404 var urlScheme = parsedURL.Scheme 405 // The registry's URL scheme has to match the Index' 406 for _, ep := range headers { 407 epList := strings.Split(ep, ",") 408 for _, epListElement := range epList { 409 endpoints = append( 410 endpoints, 411 fmt.Sprintf("%s://%s/v1/", urlScheme, strings.TrimSpace(epListElement))) 412 } 413 } 414 return endpoints, nil 415 } 416 417 // GetRepositoryData returns lists of images and endpoints for the repository 418 func (r *Session) GetRepositoryData(name reference.Named) (*RepositoryData, error) { 419 repositoryTarget := fmt.Sprintf("%srepositories/%s/images", r.indexEndpoint.String(), name.RemoteName()) 420 421 logrus.Debugf("[registry] Calling GET %s", repositoryTarget) 422 423 req, err := http.NewRequest("GET", repositoryTarget, nil) 424 if err != nil { 425 return nil, err 426 } 427 // this will set basic auth in r.client.Transport and send cached X-Docker-Token headers for all subsequent requests 428 req.Header.Set("X-Docker-Token", "true") 429 res, err := r.client.Do(req) 430 if err != nil { 431 // check if the error is because of i/o timeout 432 // and return a non-obtuse error message for users 433 // "Get https://index.docker.io/v1/repositories/library/busybox/images: i/o timeout" 434 // was a top search on the docker user forum 435 if isTimeout(err) { 436 return nil, fmt.Errorf("Network timed out while trying to connect to %s. You may want to check your internet connection or if you are behind a proxy.", repositoryTarget) 437 } 438 return nil, fmt.Errorf("Error while pulling image: %v", err) 439 } 440 defer res.Body.Close() 441 if res.StatusCode == 401 { 442 return nil, errcode.ErrorCodeUnauthorized.WithArgs() 443 } 444 // TODO: Right now we're ignoring checksums in the response body. 445 // In the future, we need to use them to check image validity. 446 if res.StatusCode == 404 { 447 return nil, httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code: %d", res.StatusCode), res) 448 } else if res.StatusCode != 200 { 449 errBody, err := ioutil.ReadAll(res.Body) 450 if err != nil { 451 logrus.Debugf("Error reading response body: %s", err) 452 } 453 return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Error: Status %d trying to pull repository %s: %q", res.StatusCode, name.RemoteName(), errBody), res) 454 } 455 456 var endpoints []string 457 if res.Header.Get("X-Docker-Endpoints") != "" { 458 endpoints, err = buildEndpointsList(res.Header["X-Docker-Endpoints"], r.indexEndpoint.String()) 459 if err != nil { 460 return nil, err 461 } 462 } else { 463 // Assume the endpoint is on the same host 464 endpoints = append(endpoints, fmt.Sprintf("%s://%s/v1/", r.indexEndpoint.URL.Scheme, req.URL.Host)) 465 } 466 467 remoteChecksums := []*ImgData{} 468 if err := json.NewDecoder(res.Body).Decode(&remoteChecksums); err != nil { 469 return nil, err 470 } 471 472 // Forge a better object from the retrieved data 473 imgsData := make(map[string]*ImgData, len(remoteChecksums)) 474 for _, elem := range remoteChecksums { 475 imgsData[elem.ID] = elem 476 } 477 478 return &RepositoryData{ 479 ImgList: imgsData, 480 Endpoints: endpoints, 481 }, nil 482 } 483 484 // PushImageChecksumRegistry uploads checksums for an image 485 func (r *Session) PushImageChecksumRegistry(imgData *ImgData, registry string) error { 486 u := registry + "images/" + imgData.ID + "/checksum" 487 488 logrus.Debugf("[registry] Calling PUT %s", u) 489 490 req, err := http.NewRequest("PUT", u, nil) 491 if err != nil { 492 return err 493 } 494 req.Header.Set("X-Docker-Checksum", imgData.Checksum) 495 req.Header.Set("X-Docker-Checksum-Payload", imgData.ChecksumPayload) 496 497 res, err := r.client.Do(req) 498 if err != nil { 499 return fmt.Errorf("Failed to upload metadata: %v", err) 500 } 501 defer res.Body.Close() 502 if len(res.Cookies()) > 0 { 503 r.client.Jar.SetCookies(req.URL, res.Cookies()) 504 } 505 if res.StatusCode != 200 { 506 errBody, err := ioutil.ReadAll(res.Body) 507 if err != nil { 508 return fmt.Errorf("HTTP code %d while uploading metadata and error when trying to parse response body: %s", res.StatusCode, err) 509 } 510 var jsonBody map[string]string 511 if err := json.Unmarshal(errBody, &jsonBody); err != nil { 512 errBody = []byte(err.Error()) 513 } else if jsonBody["error"] == "Image already exists" { 514 return ErrAlreadyExists 515 } 516 return fmt.Errorf("HTTP code %d while uploading metadata: %q", res.StatusCode, errBody) 517 } 518 return nil 519 } 520 521 // PushImageJSONRegistry pushes JSON metadata for a local image to the registry 522 func (r *Session) PushImageJSONRegistry(imgData *ImgData, jsonRaw []byte, registry string) error { 523 524 u := registry + "images/" + imgData.ID + "/json" 525 526 logrus.Debugf("[registry] Calling PUT %s", u) 527 528 req, err := http.NewRequest("PUT", u, bytes.NewReader(jsonRaw)) 529 if err != nil { 530 return err 531 } 532 req.Header.Add("Content-type", "application/json") 533 534 res, err := r.client.Do(req) 535 if err != nil { 536 return fmt.Errorf("Failed to upload metadata: %s", err) 537 } 538 defer res.Body.Close() 539 if res.StatusCode == 401 && strings.HasPrefix(registry, "http://") { 540 return httputils.NewHTTPRequestError("HTTP code 401, Docker will not send auth headers over HTTP.", res) 541 } 542 if res.StatusCode != 200 { 543 errBody, err := ioutil.ReadAll(res.Body) 544 if err != nil { 545 return httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d while uploading metadata and error when trying to parse response body: %s", res.StatusCode, err), res) 546 } 547 var jsonBody map[string]string 548 if err := json.Unmarshal(errBody, &jsonBody); err != nil { 549 errBody = []byte(err.Error()) 550 } else if jsonBody["error"] == "Image already exists" { 551 return ErrAlreadyExists 552 } 553 return httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d while uploading metadata: %q", res.StatusCode, errBody), res) 554 } 555 return nil 556 } 557 558 // PushImageLayerRegistry sends the checksum of an image layer to the registry 559 func (r *Session) PushImageLayerRegistry(imgID string, layer io.Reader, registry string, jsonRaw []byte) (checksum string, checksumPayload string, err error) { 560 u := registry + "images/" + imgID + "/layer" 561 562 logrus.Debugf("[registry] Calling PUT %s", u) 563 564 tarsumLayer, err := tarsum.NewTarSum(layer, false, tarsum.Version0) 565 if err != nil { 566 return "", "", err 567 } 568 h := sha256.New() 569 h.Write(jsonRaw) 570 h.Write([]byte{'\n'}) 571 checksumLayer := io.TeeReader(tarsumLayer, h) 572 573 req, err := http.NewRequest("PUT", u, checksumLayer) 574 if err != nil { 575 return "", "", err 576 } 577 req.Header.Add("Content-Type", "application/octet-stream") 578 req.ContentLength = -1 579 req.TransferEncoding = []string{"chunked"} 580 res, err := r.client.Do(req) 581 if err != nil { 582 return "", "", fmt.Errorf("Failed to upload layer: %v", err) 583 } 584 if rc, ok := layer.(io.Closer); ok { 585 if err := rc.Close(); err != nil { 586 return "", "", err 587 } 588 } 589 defer res.Body.Close() 590 591 if res.StatusCode != 200 { 592 errBody, err := ioutil.ReadAll(res.Body) 593 if err != nil { 594 return "", "", httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d while uploading metadata and error when trying to parse response body: %s", res.StatusCode, err), res) 595 } 596 return "", "", httputils.NewHTTPRequestError(fmt.Sprintf("Received HTTP code %d while uploading layer: %q", res.StatusCode, errBody), res) 597 } 598 599 checksumPayload = "sha256:" + hex.EncodeToString(h.Sum(nil)) 600 return tarsumLayer.Sum(jsonRaw), checksumPayload, nil 601 } 602 603 // PushRegistryTag pushes a tag on the registry. 604 // Remote has the format '<user>/<repo> 605 func (r *Session) PushRegistryTag(remote reference.Named, revision, tag, registry string) error { 606 // "jsonify" the string 607 revision = "\"" + revision + "\"" 608 path := fmt.Sprintf("repositories/%s/tags/%s", remote.RemoteName(), tag) 609 610 req, err := http.NewRequest("PUT", registry+path, strings.NewReader(revision)) 611 if err != nil { 612 return err 613 } 614 req.Header.Add("Content-type", "application/json") 615 req.ContentLength = int64(len(revision)) 616 res, err := r.client.Do(req) 617 if err != nil { 618 return err 619 } 620 res.Body.Close() 621 if res.StatusCode != 200 && res.StatusCode != 201 { 622 return httputils.NewHTTPRequestError(fmt.Sprintf("Internal server error: %d trying to push tag %s on %s", res.StatusCode, tag, remote.RemoteName()), res) 623 } 624 return nil 625 } 626 627 // PushImageJSONIndex uploads an image list to the repository 628 func (r *Session) PushImageJSONIndex(remote reference.Named, imgList []*ImgData, validate bool, regs []string) (*RepositoryData, error) { 629 cleanImgList := []*ImgData{} 630 if validate { 631 for _, elem := range imgList { 632 if elem.Checksum != "" { 633 cleanImgList = append(cleanImgList, elem) 634 } 635 } 636 } else { 637 cleanImgList = imgList 638 } 639 640 imgListJSON, err := json.Marshal(cleanImgList) 641 if err != nil { 642 return nil, err 643 } 644 var suffix string 645 if validate { 646 suffix = "images" 647 } 648 u := fmt.Sprintf("%srepositories/%s/%s", r.indexEndpoint.String(), remote.RemoteName(), suffix) 649 logrus.Debugf("[registry] PUT %s", u) 650 logrus.Debugf("Image list pushed to index:\n%s", imgListJSON) 651 headers := map[string][]string{ 652 "Content-type": {"application/json"}, 653 // this will set basic auth in r.client.Transport and send cached X-Docker-Token headers for all subsequent requests 654 "X-Docker-Token": {"true"}, 655 } 656 if validate { 657 headers["X-Docker-Endpoints"] = regs 658 } 659 660 // Redirect if necessary 661 var res *http.Response 662 for { 663 if res, err = r.putImageRequest(u, headers, imgListJSON); err != nil { 664 return nil, err 665 } 666 if !shouldRedirect(res) { 667 break 668 } 669 res.Body.Close() 670 u = res.Header.Get("Location") 671 logrus.Debugf("Redirected to %s", u) 672 } 673 defer res.Body.Close() 674 675 if res.StatusCode == 401 { 676 return nil, errcode.ErrorCodeUnauthorized.WithArgs() 677 } 678 679 var tokens, endpoints []string 680 if !validate { 681 if res.StatusCode != 200 && res.StatusCode != 201 { 682 errBody, err := ioutil.ReadAll(res.Body) 683 if err != nil { 684 logrus.Debugf("Error reading response body: %s", err) 685 } 686 return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Error: Status %d trying to push repository %s: %q", res.StatusCode, remote.RemoteName(), errBody), res) 687 } 688 tokens = res.Header["X-Docker-Token"] 689 logrus.Debugf("Auth token: %v", tokens) 690 691 if res.Header.Get("X-Docker-Endpoints") == "" { 692 return nil, fmt.Errorf("Index response didn't contain any endpoints") 693 } 694 endpoints, err = buildEndpointsList(res.Header["X-Docker-Endpoints"], r.indexEndpoint.String()) 695 if err != nil { 696 return nil, err 697 } 698 } else { 699 if res.StatusCode != 204 { 700 errBody, err := ioutil.ReadAll(res.Body) 701 if err != nil { 702 logrus.Debugf("Error reading response body: %s", err) 703 } 704 return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Error: Status %d trying to push checksums %s: %q", res.StatusCode, remote.RemoteName(), errBody), res) 705 } 706 } 707 708 return &RepositoryData{ 709 Endpoints: endpoints, 710 }, nil 711 } 712 713 func (r *Session) putImageRequest(u string, headers map[string][]string, body []byte) (*http.Response, error) { 714 req, err := http.NewRequest("PUT", u, bytes.NewReader(body)) 715 if err != nil { 716 return nil, err 717 } 718 req.ContentLength = int64(len(body)) 719 for k, v := range headers { 720 req.Header[k] = v 721 } 722 response, err := r.client.Do(req) 723 if err != nil { 724 return nil, err 725 } 726 return response, nil 727 } 728 729 func shouldRedirect(response *http.Response) bool { 730 return response.StatusCode >= 300 && response.StatusCode < 400 731 } 732 733 // SearchRepositories performs a search against the remote repository 734 func (r *Session) SearchRepositories(term string, limit int) (*registrytypes.SearchResults, error) { 735 if limit < 1 || limit > 100 { 736 return nil, fmt.Errorf("Limit %d is outside the range of [1, 100]", limit) 737 } 738 logrus.Debugf("Index server: %s", r.indexEndpoint) 739 u := r.indexEndpoint.String() + "search?q=" + url.QueryEscape(term) + "&n=" + url.QueryEscape(fmt.Sprintf("%d", limit)) 740 741 req, err := http.NewRequest("GET", u, nil) 742 if err != nil { 743 return nil, fmt.Errorf("Error while getting from the server: %v", err) 744 } 745 // Have the AuthTransport send authentication, when logged in. 746 req.Header.Set("X-Docker-Token", "true") 747 res, err := r.client.Do(req) 748 if err != nil { 749 return nil, err 750 } 751 defer res.Body.Close() 752 if res.StatusCode != 200 { 753 return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Unexpected status code %d", res.StatusCode), res) 754 } 755 result := new(registrytypes.SearchResults) 756 return result, json.NewDecoder(res.Body).Decode(result) 757 } 758 759 // GetAuthConfig returns the authentication settings for a session 760 // TODO(tiborvass): remove this once registry client v2 is vendored 761 func (r *Session) GetAuthConfig(withPasswd bool) *types.AuthConfig { 762 password := "" 763 if withPasswd { 764 password = r.authConfig.Password 765 } 766 return &types.AuthConfig{ 767 Username: r.authConfig.Username, 768 Password: password, 769 } 770 } 771 772 func isTimeout(err error) bool { 773 type timeout interface { 774 Timeout() bool 775 } 776 e := err 777 switch urlErr := err.(type) { 778 case *url.Error: 779 e = urlErr.Err 780 } 781 t, ok := e.(timeout) 782 return ok && t.Timeout() 783 }