1 // Copyright (C) The Arvados Authors. All rights reserved.
3 // SPDX-License-Identifier: AGPL-3.0
19 "git.curoverse.com/arvados.git/sdk/go/arvados"
20 "git.curoverse.com/arvados.git/sdk/go/auth"
21 "git.curoverse.com/arvados.git/sdk/go/httpserver"
22 "git.curoverse.com/arvados.git/sdk/go/keepclient"
25 var wfRe = regexp.MustCompile(`^/arvados/v1/workflows/([0-9a-z]{5})-[^/]+$`)
26 var collectionRe = regexp.MustCompile(`^/arvados/v1/collections/([0-9a-z]{5})-[^/]+$`)
28 type genericFederatedRequestHandler struct {
33 type collectionFederatedRequestHandler struct {
38 func (h *Handler) remoteClusterRequest(remoteID string, w http.ResponseWriter, req *http.Request, filter ResponseFilter) {
39 remote, ok := h.Cluster.RemoteClusters[remoteID]
41 httpserver.Error(w, "no proxy available for cluster "+remoteID, http.StatusNotFound)
44 scheme := remote.Scheme
48 err := h.saltAuthToken(req, remoteID)
50 httpserver.Error(w, err.Error(), http.StatusBadRequest)
57 RawPath: req.URL.RawPath,
58 RawQuery: req.URL.RawQuery,
60 client := h.secureClient
62 client = h.insecureClient
64 h.proxy.Do(w, req, urlOut, client, filter)
67 func (h *genericFederatedRequestHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
68 m := wfRe.FindStringSubmatch(req.URL.Path)
69 if len(m) < 2 || m[1] == h.handler.Cluster.ClusterID {
70 h.next.ServeHTTP(w, req)
73 h.handler.remoteClusterRequest(m[1], w, req, nil)
76 type rewriteSignaturesClusterId string
78 func (clusterId rewriteSignaturesClusterId) rewriteSignatures(resp *http.Response) (newResponse *http.Response, err error) {
79 if resp.StatusCode != 200 {
83 originalBody := resp.Body
84 defer originalBody.Close()
86 var col arvados.Collection
87 err = json.NewDecoder(resp.Body).Decode(&col)
92 // rewriting signatures will make manifest text 5-10% bigger so calculate
93 // capacity accordingly
94 updatedManifest := bytes.NewBuffer(make([]byte, 0, int(float64(len(col.ManifestText))*1.1)))
96 scanner := bufio.NewScanner(strings.NewReader(col.ManifestText))
97 scanner.Buffer(make([]byte, 1048576), len(col.ManifestText))
99 line := scanner.Text()
100 tokens := strings.Split(line, " ")
102 return nil, fmt.Errorf("Invalid stream (<3 tokens): %q", line)
105 updatedManifest.WriteString(tokens[0])
106 for _, token := range tokens[1:] {
107 updatedManifest.WriteString(" ")
108 m := keepclient.SignedLocatorRe.FindStringSubmatch(token)
110 // Rewrite the block signature to be a remote signature
111 fmt.Fprintf(updatedManifest, "%s%s%s+R%s-%s%s", m[1], m[2], m[3], clusterId, m[5][2:], m[8])
113 updatedManifest.WriteString(token)
117 updatedManifest.WriteString("\n")
120 col.ManifestText = updatedManifest.String()
122 newbody, err := json.Marshal(col)
127 buf := bytes.NewBuffer(newbody)
128 resp.Body = ioutil.NopCloser(buf)
129 resp.ContentLength = int64(buf.Len())
130 resp.Header.Set("Content-Length", fmt.Sprintf("%v", buf.Len()))
135 func (h *collectionFederatedRequestHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
136 m := collectionRe.FindStringSubmatch(req.URL.Path)
137 if len(m) < 2 || m[1] == h.handler.Cluster.ClusterID {
138 h.next.ServeHTTP(w, req)
141 h.handler.remoteClusterRequest(m[1], w, req,
142 rewriteSignaturesClusterId(m[1]).rewriteSignatures)
145 func (h *Handler) setupProxyRemoteCluster(next http.Handler) http.Handler {
146 mux := http.NewServeMux()
147 mux.Handle("/arvados/v1/workflows", next)
148 mux.Handle("/arvados/v1/workflows/", &genericFederatedRequestHandler{next, h})
149 mux.Handle("/arvados/v1/collections", next)
150 mux.Handle("/arvados/v1/collections/", &collectionFederatedRequestHandler{next, h})
151 mux.Handle("/", next)
156 type CurrentUser struct {
157 Authorization arvados.APIClientAuthorization
161 func (h *Handler) validateAPItoken(req *http.Request, user *CurrentUser) error {
166 return db.QueryRowContext(req.Context(), `SELECT api_client_authorizations.uuid, users.uuid FROM api_client_authorizations JOIN users on api_client_authorizations.user_id=users.id WHERE api_token=$1 AND (expires_at IS NULL OR expires_at > current_timestamp) LIMIT 1`, user.Authorization.APIToken).Scan(&user.Authorization.UUID, &user.UUID)
169 // Extract the auth token supplied in req, and replace it with a
170 // salted token for the remote cluster.
171 func (h *Handler) saltAuthToken(req *http.Request, remote string) error {
172 creds := auth.NewCredentials()
173 creds.LoadTokensFromHTTPRequest(req)
174 if len(creds.Tokens) == 0 && req.Header.Get("Content-Type") == "application/x-www-form-encoded" {
175 // Override ParseForm's 10MiB limit by ensuring
176 // req.Body is a *http.maxBytesReader.
177 req.Body = http.MaxBytesReader(nil, req.Body, 1<<28) // 256MiB. TODO: use MaxRequestSize from discovery doc or config.
178 if err := creds.LoadTokensFromHTTPRequestBody(req); err != nil {
181 // Replace req.Body with a buffer that re-encodes the
182 // form without api_token, in case we end up
183 // forwarding the request.
184 if req.PostForm != nil {
185 req.PostForm.Del("api_token")
187 req.Body = ioutil.NopCloser(bytes.NewBufferString(req.PostForm.Encode()))
189 if len(creds.Tokens) == 0 {
192 token, err := auth.SaltToken(creds.Tokens[0], remote)
193 if err == auth.ErrObsoleteToken {
194 // If the token exists in our own database, salt it
195 // for the remote. Otherwise, assume it was issued by
196 // the remote, and pass it through unmodified.
197 currentUser := CurrentUser{Authorization: arvados.APIClientAuthorization{APIToken: creds.Tokens[0]}}
198 err = h.validateAPItoken(req, ¤tUser)
199 if err == sql.ErrNoRows {
200 // Not ours; pass through unmodified.
201 token = currentUser.Authorization.APIToken
202 } else if err != nil {
205 // Found; make V2 version and salt it.
206 token, err = auth.SaltToken(currentUser.Authorization.TokenV2(), remote)
211 } else if err != nil {
214 req.Header.Set("Authorization", "Bearer "+token)
216 // Remove api_token=... from the the query string, in case we
217 // end up forwarding the request.
218 if values, err := url.ParseQuery(req.URL.RawQuery); err != nil {
220 } else if _, ok := values["api_token"]; ok {
221 delete(values, "api_token")
222 req.URL.RawQuery = values.Encode()