internal/httpd/routes.go
324 lines · 17854 bytes
1package httpd
2
3import (
4 "fmt"
5 "io/fs"
6 "net"
7 "net/http"
8 "strings"
9
10 "gitbay.org/gitbay/internal/web"
11)
12
13// Route is one entry in the explicit route table. The view-only guarantee is
14// structural: Handler() consults web.mode when building the table, and the
15// route test asserts no mutating route exists in view_only mode.
16type Route struct {
17 Method string
18 Pattern string // without method prefix
19 // Mutating marks routes that can change server state. The git transport
20 // POSTs are not mutating: upload-pack is a pure read, and the
21 // receive-pack endpoint is a static refusal that writes nothing.
22 Mutating bool
23 Handler http.HandlerFunc
24}
25
26// Routes returns the route table for the configured web.mode.
27func (s *Server) Routes() []Route {
28 // Git smart transport (anonymous, public repos only).
29 routes := []Route{
30 {Method: "GET", Pattern: "/{owner}/{repo}/info/refs", Handler: s.infoRefs},
31 {Method: "POST", Pattern: "/{owner}/{repo}/git-upload-pack", Handler: s.uploadPack},
32 {Method: "POST", Pattern: "/{owner}/{repo}/git-receive-pack", Handler: s.receivePackRefusal},
33 // Git LFS: token-authenticated transport (minted over SSH), not
34 // web-session routes — anonymous download for public repos only.
35 {Method: "POST", Pattern: "/{owner}/{repo}/info/lfs/objects/batch", Handler: s.lfsBatch},
36 {Method: "GET", Pattern: "/{owner}/{repo}/info/lfs/objects/{oid}", Handler: s.lfsDownload},
37 {Method: "PUT", Pattern: "/{owner}/{repo}/info/lfs/objects/{oid}", Handler: s.lfsUpload},
38 }
39
40 // Web UI, read-only. These exist in every mode.
41 routes = append(routes,
42 Route{Method: "GET", Pattern: "/{$}", Handler: s.index},
43 Route{Method: "GET", Pattern: "/explore", Handler: s.explore},
44 Route{Method: "GET", Pattern: "/search", Handler: s.globalSearch},
45 Route{Method: "GET", Pattern: "/healthz", Handler: s.healthz},
46 Route{Method: "GET", Pattern: "/privacy", Handler: s.privacy},
47 Route{Method: "GET", Pattern: "/static/style.css", Handler: s.stylesheet},
48 )
49 // One literal route per embedded font file: a {name} wildcard is
50 // ambiguous against /{owner}/{repo}/... patterns in ServeMux precedence,
51 // and hand-typed names drifted from the files once (#102).
52 fonts, _ := fs.ReadDir(web.FontFS, "static/fonts")
53 for _, f := range fonts {
54 routes = append(routes, Route{Method: "GET", Pattern: "/static/fonts/" + f.Name(), Handler: s.font})
55 }
56 images, _ := fs.ReadDir(web.ImageFS, "static/img")
57 for _, f := range images {
58 routes = append(routes, Route{Method: "GET", Pattern: "/static/img/" + f.Name(), Handler: s.image})
59 }
60 routes = append(routes,
61 Route{Method: "GET", Pattern: "/favicon.svg", Handler: s.favicon},
62 Route{Method: "GET", Pattern: "/{owner}", Handler: s.ownerPage},
63 Route{Method: "GET", Pattern: "/{owner}/{repo}", Handler: s.repoHome},
64 Route{Method: "GET", Pattern: "/{owner}/{repo}/tree/{ref}/{path...}", Handler: s.tree},
65 Route{Method: "GET", Pattern: "/{owner}/{repo}/blob/{ref}/{path...}", Handler: s.blob},
66 Route{Method: "GET", Pattern: "/{owner}/{repo}/blame/{ref}/{path...}", Handler: s.blame},
67 Route{Method: "GET", Pattern: "/{owner}/{repo}/search", Handler: s.search},
68 Route{Method: "GET", Pattern: "/{owner}/{repo}/milestones", Handler: s.milestones},
69 Route{Method: "GET", Pattern: "/{owner}/{repo}/labels", Handler: s.labels},
70 Route{Method: "GET", Pattern: "/{owner}/{repo}/wiki", Handler: s.wiki},
71 Route{Method: "GET", Pattern: "/{owner}/{repo}/wiki/_raw/{path...}", Handler: s.wikiRaw},
72 Route{Method: "GET", Pattern: "/{owner}/{repo}/wiki/{page}", Handler: s.wiki},
73 Route{Method: "GET", Pattern: "/{owner}/{repo}/releases", Handler: s.releases},
74 Route{Method: "GET", Pattern: "/{owner}/{repo}/releases.atom", Handler: s.releasesAtom},
75 Route{Method: "GET", Pattern: "/{owner}/{repo}/log.atom", Handler: s.logAtom},
76 Route{Method: "GET", Pattern: "/{owner}/{repo}/log.atom/{ref...}", Handler: s.logAtom},
77 Route{Method: "GET", Pattern: "/{owner}/activity.atom", Handler: s.ownerAtom},
78 Route{Method: "GET", Pattern: "/{owner}/-/labels", Handler: s.orgLabels},
79 Route{Method: "GET", Pattern: "/{owner}/-/milestones", Handler: s.orgMilestones},
80 Route{Method: "GET", Pattern: "/{owner}/-/snippets", Handler: s.snippetsPage},
81 Route{Method: "GET", Pattern: "/{owner}/-/snippets/{id}", Handler: s.snippetPage},
82 Route{Method: "GET", Pattern: "/{owner}/-/snippets/{id}/raw/{name}", Handler: s.snippetRaw},
83 Route{Method: "GET", Pattern: "/{owner}/{repo}/builds", Handler: s.builds},
84 Route{Method: "GET", Pattern: "/{owner}/{repo}/badge/build.svg", Handler: s.buildBadge},
85 Route{Method: "GET", Pattern: "/{owner}/{repo}/badge/build.png", Handler: s.buildBadgePNG},
86 Route{Method: "GET", Pattern: "/{owner}/{repo}/builds/{n}", Handler: s.build},
87 Route{Method: "GET", Pattern: "/{owner}/{repo}/releases/download/{tag}/{name}", Handler: s.releaseAsset},
88 Route{Method: "GET", Pattern: "/{owner}/{repo}/raw/{ref}/{path...}", Handler: s.raw},
89 Route{Method: "GET", Pattern: "/{owner}/{repo}/log", Handler: s.log},
90 Route{Method: "GET", Pattern: "/{owner}/{repo}/log/{ref}", Handler: s.log},
91 Route{Method: "GET", Pattern: "/{owner}/{repo}/commit/{sha}", Handler: s.commit},
92 Route{Method: "GET", Pattern: "/{owner}/{repo}/compare", Handler: s.compare},
93 Route{Method: "GET", Pattern: "/{owner}/{repo}/compare/{range}", Handler: s.compare},
94 Route{Method: "GET", Pattern: "/{owner}/{repo}/refs", Handler: s.refs},
95 Route{Method: "GET", Pattern: "/{owner}/{repo}/archive/{file}", Handler: s.archive},
96 Route{Method: "GET", Pattern: "/{owner}/{repo}/issues", Handler: s.issues},
97 Route{Method: "GET", Pattern: "/{owner}/{repo}/issues/{n}", Handler: s.issue},
98 Route{Method: "GET", Pattern: "/{owner}/{repo}/mrs", Handler: s.mrs},
99 Route{Method: "GET", Pattern: "/{owner}/{repo}/mrs/{n}", Handler: s.mr},
100 )
101
102 // The JSON API is its own opt-in surface, independent of web.mode.
103 if s.cfg.API.Enabled {
104 routes = append(routes,
105 Route{Method: "POST", Pattern: "/api/v1/cmd", Mutating: true, Handler: s.apiCmd},
106 Route{Method: "GET", Pattern: "/api/v1/read", Handler: s.apiRead},
107 )
108 }
109
110 // Account-mode routes exist only when web.mode = "accounts". In
111 // view_only they are never registered — the structural guarantee.
112 if s.cfg.Web.Mode == "accounts" {
113 routes = append(routes,
114 Route{Method: "GET", Pattern: "/login", Handler: s.login, Mutating: true}, // consumes a one-time token
115 Route{Method: "POST", Pattern: "/login", Mutating: true,
116 Handler: s.checkOrigin(s.loginSubmit)},
117 Route{Method: "POST", Pattern: "/logout", Mutating: true,
118 Handler: s.checkOrigin(s.logout)},
119 Route{Method: "GET", Pattern: "/new", Handler: s.requireUser(s.newRepoForm)},
120 Route{Method: "GET", Pattern: "/settings", Handler: s.requireUser(s.accountForm)},
121 Route{Method: "GET", Pattern: "/settings/export", Handler: s.requireUser(s.accountExport)},
122 Route{Method: "GET", Pattern: "/notifications", Handler: s.requireUser(s.notifications)},
123 Route{Method: "POST", Pattern: "/notifications", Mutating: true,
124 Handler: s.checkOrigin(s.requireUser(s.notificationsRead))},
125 Route{Method: "GET", Pattern: "/admin", Handler: s.requireUser(s.adminPage)},
126 Route{Method: "GET", Pattern: "/admin/users", Handler: s.requireUser(s.adminUsers)},
127 Route{Method: "POST", Pattern: "/admin/users", Mutating: true,
128 Handler: s.checkOrigin(s.requireUser(s.adminUsersSubmit))},
129 Route{Method: "POST", Pattern: "/{owner}", Mutating: true,
130 Handler: s.checkOrigin(s.requireUser(s.orgSubmit))},
131 Route{Method: "POST", Pattern: "/settings", Mutating: true,
132 Handler: s.checkOrigin(s.requireUser(s.accountSubmit))},
133 )
134 // Web signup fronts the same registration path as SSH register,
135 // so it exists only when registration is open or invite.
136 if s.cfg.Registration.Mode != "closed" {
137 routes = append(routes,
138 Route{Method: "GET", Pattern: "/register", Handler: s.signupForm},
139 Route{Method: "POST", Pattern: "/register", Mutating: true,
140 Handler: s.checkOrigin(s.signupSubmit)},
141 )
142 }
143 routes = append(routes,
144 Route{Method: "POST", Pattern: "/new", Mutating: true,
145 Handler: s.checkOrigin(s.requireUser(s.newSubmit))},
146 Route{Method: "POST", Pattern: "/{owner}/{repo}/pin", Mutating: true,
147 Handler: s.checkOrigin(s.requireUser(s.pinToggle))},
148 Route{Method: "POST", Pattern: "/{owner}/{repo}/watch", Mutating: true,
149 Handler: s.checkOrigin(s.requireUser(s.watchToggle))},
150 Route{Method: "GET", Pattern: "/{owner}/{repo}/issues/new",
151 Handler: s.requireUser(s.issueCreateForm)},
152 Route{Method: "POST", Pattern: "/{owner}/{repo}/issues/new", Mutating: true,
153 Handler: s.checkOrigin(s.requireUser(s.issueCreateSubmit))},
154 Route{Method: "POST", Pattern: "/{owner}/{repo}/issues/{n}/comment", Mutating: true,
155 Handler: s.checkOrigin(s.requireUser(s.issueCommentSubmit))},
156 Route{Method: "POST", Pattern: "/{owner}/{repo}/issues/{n}/edit", Mutating: true,
157 Handler: s.checkOrigin(s.requireUser(s.issueEditSubmit))},
158 // Triage: each runs the matching issue command.
159 Route{Method: "POST", Pattern: "/{owner}/{repo}/issues/{n}/state", Mutating: true,
160 Handler: s.checkOrigin(s.requireUser(s.issueStateSubmit))},
161 Route{Method: "POST", Pattern: "/{owner}/{repo}/issues/{n}/label", Mutating: true,
162 Handler: s.checkOrigin(s.requireUser(s.issueLabelSubmit))},
163 Route{Method: "POST", Pattern: "/{owner}/{repo}/issues/{n}/assign", Mutating: true,
164 Handler: s.checkOrigin(s.requireUser(s.issueAssignSubmit))},
165 Route{Method: "POST", Pattern: "/{owner}/{repo}/issues/{n}/milestone", Mutating: true,
166 Handler: s.checkOrigin(s.requireUser(s.issueMilestoneSubmit))},
167 Route{Method: "POST", Pattern: "/{owner}/{repo}/releases", Mutating: true,
168 Handler: s.checkOrigin(s.requireUser(s.releaseSubmit))},
169 Route{Method: "POST", Pattern: "/{owner}/{repo}/labels", Mutating: true,
170 Handler: s.checkOrigin(s.requireUser(s.labelSubmit))},
171 Route{Method: "GET", Pattern: "/bookmarks", Handler: s.requireUser(s.bookmarksPage)},
172 Route{Method: "GET", Pattern: "/{owner}/-/snippets/new", Handler: s.requireUser(s.snippetNewForm)},
173 Route{Method: "POST", Pattern: "/{owner}/-/snippets/new", Mutating: true,
174 Handler: s.checkOrigin(s.requireUser(s.snippetNewSubmit))},
175 Route{Method: "POST", Pattern: "/{owner}/-/snippets/{id}/edit", Mutating: true,
176 Handler: s.checkOrigin(s.requireUser(s.snippetEditSubmit))},
177 Route{Method: "POST", Pattern: "/{owner}/-/snippets/{id}/delete", Mutating: true,
178 Handler: s.checkOrigin(s.requireUser(s.snippetDeleteSubmit))},
179 Route{Method: "POST", Pattern: "/{owner}/-/snippets/{id}/file", Mutating: true,
180 Handler: s.checkOrigin(s.requireUser(s.snippetFileSubmit))},
181 Route{Method: "POST", Pattern: "/{owner}/-/snippets/{id}/file/remove", Mutating: true,
182 Handler: s.checkOrigin(s.requireUser(s.snippetFileRemoveSubmit))},
183 Route{Method: "POST", Pattern: "/{owner}/{repo}/bookmark", Mutating: true,
184 Handler: s.checkOrigin(s.requireUser(s.bookmarkToggle))},
185 Route{Method: "GET", Pattern: "/{owner}/{repo}/fork", Handler: s.requireUser(s.forkForm)},
186 Route{Method: "POST", Pattern: "/{owner}/{repo}/fork", Mutating: true,
187 Handler: s.checkOrigin(s.requireUser(s.forkSubmit))},
188 Route{Method: "POST", Pattern: "/{owner}/{repo}/builds", Mutating: true,
189 Handler: s.checkOrigin(s.requireUser(s.buildTriggerSubmit))},
190 Route{Method: "POST", Pattern: "/{owner}/{repo}/builds/{n}/cancel", Mutating: true,
191 Handler: s.checkOrigin(s.requireUser(s.buildCancelSubmit))},
192 Route{Method: "GET", Pattern: "/{owner}/{repo}/settings",
193 Handler: s.requireUser(s.settingsForm)},
194 Route{Method: "POST", Pattern: "/{owner}/{repo}/settings", Mutating: true,
195 Handler: s.checkOrigin(s.requireUser(s.settingsSubmit))},
196 Route{Method: "GET", Pattern: "/{owner}/{repo}/mrs/new",
197 Handler: s.requireUser(s.mrCreateForm)},
198 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/new", Mutating: true,
199 Handler: s.checkOrigin(s.requireUser(s.mrCreateSubmit))},
200 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/{n}/edit", Mutating: true,
201 Handler: s.checkOrigin(s.requireUser(s.mrEditSubmit))},
202 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/{n}/comment", Mutating: true,
203 Handler: s.checkOrigin(s.requireUser(s.mrCommentSubmit))},
204 // Review loop: each runs the matching mr command.
205 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/{n}/review", Mutating: true,
206 Handler: s.checkOrigin(s.requireUser(s.mrReviewSubmit))},
207 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/{n}/review-request", Mutating: true,
208 Handler: s.checkOrigin(s.requireUser(s.mrReviewRequestSubmit))},
209 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/{n}/label", Mutating: true,
210 Handler: s.checkOrigin(s.requireUser(s.mrLabelSubmit))},
211 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/{n}/merge", Mutating: true,
212 Handler: s.checkOrigin(s.requireUser(s.mrMergeSubmit))},
213 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/{n}/close", Mutating: true,
214 Handler: s.checkOrigin(s.requireUser(s.mrCloseSubmit))},
215 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/{n}/draft", Mutating: true,
216 Handler: s.checkOrigin(s.requireUser(s.mrDraftSubmit))},
217 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/{n}/retarget", Mutating: true,
218 Handler: s.checkOrigin(s.requireUser(s.mrRetargetSubmit))},
219 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/{n}/thread", Mutating: true,
220 Handler: s.checkOrigin(s.requireUser(s.mrThreadSubmit))},
221 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/{n}/diff-comment", Mutating: true,
222 Handler: s.checkOrigin(s.requireUser(s.mrDiffCommentSubmit))},
223 Route{Method: "GET", Pattern: "/{owner}/{repo}/edit/{ref}/{path...}",
224 Handler: s.requireUser(s.editForm)},
225 Route{Method: "POST", Pattern: "/{owner}/{repo}/edit/{ref}/{path...}", Mutating: true,
226 Handler: s.checkOrigin(s.requireUser(s.editSubmit))},
227 )
228 }
229 return routes
230}
231
232func (s *Server) Handler() http.Handler {
233 mux := http.NewServeMux()
234 for _, r := range s.Routes() {
235 mux.HandleFunc(r.Method+" "+r.Pattern, r.Handler)
236 }
237 // A path no pattern matches gets the 404 page, not net/http's
238 // plain-text body (#232), unless dropping a trailing slash makes it
239 // match (#233).
240 mux.HandleFunc("/", s.unmatched(mux))
241 var h http.Handler = mux
242 if len(s.cfg.GoImport) > 0 {
243 h = s.goImportHandler(mux)
244 }
245 // Always wrapped: custom pages domains work with or without the
246 // built-in [pages] domain.
247 return compressed(s.pagesRouter(s.securityHeaders(h)))
248}
249
250// unmatched answers a path no pattern matched. A GET whose path ends in
251// a slash and resolves without it redirects there, so /cmc/ reaches /cmc
252// and /cmc/-/snippets/ reaches /cmc/-/snippets (#233). Everything else is
253// the 404 page. Patterns ending in a {path...} wildcard already accept
254// the slash and never arrive here.
255func (s *Server) unmatched(mux *http.ServeMux) http.HandlerFunc {
256 return func(w http.ResponseWriter, r *http.Request) {
257 p := r.URL.Path
258 if len(p) > 1 && strings.HasSuffix(p, "/") && (r.Method == "GET" || r.Method == "HEAD") {
259 trimmed := r.Clone(r.Context())
260 u := *r.URL
261 u.Path = strings.TrimRight(p, "/")
262 trimmed.URL = &u
263 // The fallback itself is registered at "/", so a miss
264 // reports that pattern; a real route reports its own.
265 if _, pattern := mux.Handler(trimmed); pattern != "" && pattern != "/" {
266 // net/http fills Scheme and Host from an
267 // absolute-form request line, which RFC 7230
268 // requires a server to accept; carrying them
269 // into Location sends the reader off-site.
270 u.Scheme, u.Host, u.User = "", "", nil
271 http.Redirect(w, r, u.String(), http.StatusMovedPermanently)
272 return
273 }
274 }
275 s.notFound(w, r)
276 }
277}
278
279// securityHeaders sets defensive response headers on every reply. The CSP
280// is strict where it can be: no scripts at all (the UI needs none), no
281// plugins, no embedding. Inline styles are allowed because label chips
282// carry their color inline (chroma is class-based so the syntax palette
283// can follow the color scheme). Images may load from anywhere so external README images
284// still render; they are the one thing a reader-facing forge can't police
285// without a proxy.
286func (s *Server) securityHeaders(next http.Handler) http.Handler {
287 const csp = "default-src 'self'; script-src 'none'; style-src 'self' 'unsafe-inline'; " +
288 "img-src * data:; object-src 'none'; base-uri 'none'; form-action 'self'; frame-ancestors 'none'"
289 return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
290 hd := w.Header()
291 hd.Set("Content-Security-Policy", csp)
292 hd.Set("X-Frame-Options", "DENY")
293 hd.Set("X-Content-Type-Options", "nosniff")
294 hd.Set("Referrer-Policy", "no-referrer")
295 hd.Set("Cross-Origin-Opener-Policy", "same-origin")
296 if s.cfg.HTTP.TLS != "off" {
297 hd.Set("Strict-Transport-Security", "max-age=31536000; includeSubDomains")
298 }
299 next.ServeHTTP(w, r)
300 })
301}
302
303func (s *Server) goImportHandler(mux http.Handler) http.Handler {
304 // Vanity Go modules: ?go-get=1 requests under a configured module
305 // path answer with the go-import meta tag before normal routing.
306 return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
307 if r.URL.Query().Get("go-get") == "1" {
308 host := r.Host
309 if h, _, err := net.SplitHostPort(host); err == nil {
310 host = h
311 }
312 requested := host + strings.TrimSuffix(r.URL.Path, "/")
313 for module, repo := range s.cfg.GoImport {
314 if requested == module || strings.HasPrefix(requested, module+"/") {
315 w.Header().Set("Content-Type", "text/html; charset=utf-8")
316 fmt.Fprintf(w, `<!DOCTYPE html><html><head><meta name="go-import" content="%s git %s/%s.git"></head><body>%s</body></html>`,
317 module, s.cfg.Server.SiteURL, repo, module)
318 return
319 }
320 }
321 }
322 mux.ServeHTTP(w, r)
323 })
324}