julien.rbrt.fr
forked from
tangled.org/core
Monorepo for Tangled — https://tangled.org
1package repo
2
3import (
4 "encoding/base64"
5 "fmt"
6 "io"
7 "net/http"
8 "net/url"
9 "path/filepath"
10 "slices"
11 "strings"
12
13 "tangled.org/core/api/tangled"
14 "tangled.org/core/appview/config"
15 "tangled.org/core/appview/models"
16 "tangled.org/core/appview/pages"
17 "tangled.org/core/appview/pages/markup"
18 "tangled.org/core/appview/reporesolver"
19 xrpcclient "tangled.org/core/appview/xrpcclient"
20
21 indigoxrpc "github.com/bluesky-social/indigo/xrpc"
22 "github.com/go-chi/chi/v5"
23)
24
25// the content can be one of the following:
26//
27// - code : text | | raw
28// - markup : text | rendered | raw
29// - svg : text | rendered | raw
30// - png : | rendered | raw
31// - video : | rendered | raw
32// - submodule : | rendered |
33// - rest : | |
34func (rp *Repo) Blob(w http.ResponseWriter, r *http.Request) {
35 l := rp.logger.With("handler", "RepoBlob")
36
37 f, err := rp.repoResolver.Resolve(r)
38 if err != nil {
39 l.Error("failed to get repo and knot", "err", err)
40 return
41 }
42
43 ref := chi.URLParam(r, "ref")
44 ref, _ = url.PathUnescape(ref)
45
46 filePath := chi.URLParam(r, "*")
47 filePath, _ = url.PathUnescape(filePath)
48
49 scheme := "http"
50 if !rp.config.Core.Dev {
51 scheme = "https"
52 }
53 host := fmt.Sprintf("%s://%s", scheme, f.Knot)
54 xrpcc := &indigoxrpc.Client{
55 Host: host,
56 }
57 repo := fmt.Sprintf("%s/%s", f.Did, f.Name)
58 resp, err := tangled.RepoBlob(r.Context(), xrpcc, filePath, false, ref, repo)
59 if xrpcerr := xrpcclient.HandleXrpcErr(err); xrpcerr != nil {
60 l.Error("failed to call XRPC repo.blob", "err", xrpcerr)
61 rp.pages.Error503(w)
62 return
63 }
64
65 ownerSlashRepo := reporesolver.GetBaseRepoPath(r, f)
66
67 // Use XRPC response directly instead of converting to internal types
68 var breadcrumbs [][]string
69 breadcrumbs = append(breadcrumbs, []string{f.Name, fmt.Sprintf("/%s/tree/%s", ownerSlashRepo, url.PathEscape(ref))})
70 if filePath != "" {
71 for idx, elem := range strings.Split(filePath, "/") {
72 breadcrumbs = append(breadcrumbs, []string{elem, fmt.Sprintf("%s/%s", breadcrumbs[idx][1], url.PathEscape(elem))})
73 }
74 }
75
76 // Create the blob view
77 blobView := NewBlobView(resp, rp.config, f, ref, filePath, r.URL.Query())
78
79 user := rp.oauth.GetUser(r)
80
81 rp.pages.RepoBlob(w, pages.RepoBlobParams{
82 LoggedInUser: user,
83 RepoInfo: rp.repoResolver.GetRepoInfo(r, user),
84 BreadCrumbs: breadcrumbs,
85 BlobView: blobView,
86 RepoBlob_Output: resp,
87 })
88}
89
90func (rp *Repo) RepoBlobRaw(w http.ResponseWriter, r *http.Request) {
91 l := rp.logger.With("handler", "RepoBlobRaw")
92
93 f, err := rp.repoResolver.Resolve(r)
94 if err != nil {
95 l.Error("failed to get repo and knot", "err", err)
96 w.WriteHeader(http.StatusBadRequest)
97 return
98 }
99
100 ref := chi.URLParam(r, "ref")
101 ref, _ = url.PathUnescape(ref)
102
103 filePath := chi.URLParam(r, "*")
104 filePath, _ = url.PathUnescape(filePath)
105
106 scheme := "http"
107 if !rp.config.Core.Dev {
108 scheme = "https"
109 }
110 repo := f.DidSlashRepo()
111 baseURL := &url.URL{
112 Scheme: scheme,
113 Host: f.Knot,
114 Path: "/xrpc/sh.tangled.repo.blob",
115 }
116 query := baseURL.Query()
117 query.Set("repo", repo)
118 query.Set("ref", ref)
119 query.Set("path", filePath)
120 query.Set("raw", "true")
121 baseURL.RawQuery = query.Encode()
122 blobURL := baseURL.String()
123 req, err := http.NewRequest("GET", blobURL, nil)
124 if err != nil {
125 l.Error("failed to create request", "err", err)
126 return
127 }
128
129 // forward the If-None-Match header
130 if clientETag := r.Header.Get("If-None-Match"); clientETag != "" {
131 req.Header.Set("If-None-Match", clientETag)
132 }
133 client := &http.Client{}
134
135 resp, err := client.Do(req)
136 if err != nil {
137 l.Error("failed to reach knotserver", "err", err)
138 rp.pages.Error503(w)
139 return
140 }
141
142 defer resp.Body.Close()
143
144 // forward 304 not modified
145 if resp.StatusCode == http.StatusNotModified {
146 w.WriteHeader(http.StatusNotModified)
147 return
148 }
149
150 if resp.StatusCode != http.StatusOK {
151 l.Error("knotserver returned non-OK status for raw blob", "url", blobURL, "statuscode", resp.StatusCode)
152 w.WriteHeader(resp.StatusCode)
153 _, _ = io.Copy(w, resp.Body)
154 return
155 }
156
157 contentType := resp.Header.Get("Content-Type")
158 body, err := io.ReadAll(resp.Body)
159 if err != nil {
160 l.Error("error reading response body from knotserver", "err", err)
161 w.WriteHeader(http.StatusInternalServerError)
162 return
163 }
164
165 if strings.HasPrefix(contentType, "text/") || isTextualMimeType(contentType) {
166 // serve all textual content as text/plain
167 w.Header().Set("Content-Type", "text/plain; charset=utf-8")
168 w.Write(body)
169 } else if strings.HasPrefix(contentType, "image/") || strings.HasPrefix(contentType, "video/") {
170 // serve images and videos with their original content type
171 w.Header().Set("Content-Type", contentType)
172 w.Write(body)
173 } else {
174 w.WriteHeader(http.StatusUnsupportedMediaType)
175 w.Write([]byte("unsupported content type"))
176 return
177 }
178}
179
180// NewBlobView creates a BlobView from the XRPC response
181func NewBlobView(resp *tangled.RepoBlob_Output, config *config.Config, repo *models.Repo, ref, filePath string, queryParams url.Values) models.BlobView {
182 view := models.BlobView{
183 Contents: "",
184 Lines: 0,
185 }
186
187 // Set size
188 if resp.Size != nil {
189 view.SizeHint = uint64(*resp.Size)
190 } else if resp.Content != nil {
191 view.SizeHint = uint64(len(*resp.Content))
192 }
193
194 if resp.Submodule != nil {
195 view.ContentType = models.BlobContentTypeSubmodule
196 view.HasRenderedView = true
197 view.ContentSrc = resp.Submodule.Url
198 return view
199 }
200
201 // Determine if binary
202 if resp.IsBinary != nil && *resp.IsBinary {
203 view.ContentSrc = generateBlobURL(config, repo, ref, filePath)
204 ext := strings.ToLower(filepath.Ext(resp.Path))
205
206 switch ext {
207 case ".jpg", ".jpeg", ".png", ".gif", ".webp":
208 view.ContentType = models.BlobContentTypeImage
209 view.HasRawView = true
210 view.HasRenderedView = true
211 view.ShowingRendered = true
212
213 case ".svg":
214 view.ContentType = models.BlobContentTypeSvg
215 view.HasRawView = true
216 view.HasTextView = true
217 view.HasRenderedView = true
218 view.ShowingRendered = queryParams.Get("code") != "true"
219 if resp.Content != nil {
220 bytes, _ := base64.StdEncoding.DecodeString(*resp.Content)
221 view.Contents = string(bytes)
222 view.Lines = strings.Count(view.Contents, "\n") + 1
223 }
224
225 case ".mp4", ".webm", ".ogg", ".mov", ".avi":
226 view.ContentType = models.BlobContentTypeVideo
227 view.HasRawView = true
228 view.HasRenderedView = true
229 view.ShowingRendered = true
230 }
231
232 return view
233 }
234
235 // otherwise, we are dealing with text content
236 view.HasRawView = true
237 view.HasTextView = true
238
239 if resp.Content != nil {
240 view.Contents = *resp.Content
241 view.Lines = strings.Count(view.Contents, "\n") + 1
242 }
243
244 // with text, we may be dealing with markdown
245 format := markup.GetFormat(resp.Path)
246 if format == markup.FormatMarkdown {
247 view.ContentType = models.BlobContentTypeMarkup
248 view.HasRenderedView = true
249 view.ShowingRendered = queryParams.Get("code") != "true"
250 }
251
252 return view
253}
254
255func generateBlobURL(config *config.Config, repo *models.Repo, ref, filePath string) string {
256 scheme := "http"
257 if !config.Core.Dev {
258 scheme = "https"
259 }
260
261 repoName := fmt.Sprintf("%s/%s", repo.Did, repo.Name)
262 baseURL := &url.URL{
263 Scheme: scheme,
264 Host: repo.Knot,
265 Path: "/xrpc/sh.tangled.repo.blob",
266 }
267 query := baseURL.Query()
268 query.Set("repo", repoName)
269 query.Set("ref", ref)
270 query.Set("path", filePath)
271 query.Set("raw", "true")
272 baseURL.RawQuery = query.Encode()
273 blobURL := baseURL.String()
274
275 if !config.Core.Dev {
276 return markup.GenerateCamoURL(config.Camo.Host, config.Camo.SharedSecret, blobURL)
277 }
278 return blobURL
279}
280
281func isTextualMimeType(mimeType string) bool {
282 textualTypes := []string{
283 "application/json",
284 "application/xml",
285 "application/yaml",
286 "application/x-yaml",
287 "application/toml",
288 "application/javascript",
289 "application/ecmascript",
290 "message/",
291 }
292 return slices.Contains(textualTypes, mimeType)
293}