internal/httpd/routes.go
180 lines · 8798 bytes
1package httpd
2
3import (
4 "fmt"
5 "net"
6 "net/http"
7 "strings"
8)
9
10// Route is one entry in the explicit route table. The view-only guarantee is
11// structural: Handler() consults web.mode when building the table, and the
12// route test asserts no mutating route exists in view_only mode.
13type Route struct {
14 Method string
15 Pattern string // without method prefix
16 // Mutating marks routes that can change server state. The git transport
17 // POSTs are not mutating: upload-pack is a pure read, and the
18 // receive-pack endpoint is a static refusal that writes nothing.
19 Mutating bool
20 Handler http.HandlerFunc
21}
22
23// Routes returns the route table for the configured web.mode.
24func (s *Server) Routes() []Route {
25 // Git smart transport (anonymous, public repos only).
26 routes := []Route{
27 {Method: "GET", Pattern: "/{owner}/{repo}/info/refs", Handler: s.infoRefs},
28 {Method: "POST", Pattern: "/{owner}/{repo}/git-upload-pack", Handler: s.uploadPack},
29 {Method: "POST", Pattern: "/{owner}/{repo}/git-receive-pack", Handler: s.receivePackRefusal},
30 // Git LFS: token-authenticated transport (minted over SSH), not
31 // web-session routes — anonymous download for public repos only.
32 {Method: "POST", Pattern: "/{owner}/{repo}/info/lfs/objects/batch", Handler: s.lfsBatch},
33 {Method: "GET", Pattern: "/{owner}/{repo}/info/lfs/objects/{oid}", Handler: s.lfsDownload},
34 {Method: "PUT", Pattern: "/{owner}/{repo}/info/lfs/objects/{oid}", Handler: s.lfsUpload},
35 }
36
37 // Web UI, read-only. These exist in every mode.
38 routes = append(routes,
39 Route{Method: "GET", Pattern: "/{$}", Handler: s.index},
40 Route{Method: "GET", Pattern: "/explore", Handler: s.explore},
41 Route{Method: "GET", Pattern: "/privacy", Handler: s.privacy},
42 Route{Method: "GET", Pattern: "/static/style.css", Handler: s.stylesheet},
43 Route{Method: "GET", Pattern: "/favicon.svg", Handler: s.favicon},
44 Route{Method: "GET", Pattern: "/{owner}", Handler: s.ownerPage},
45 Route{Method: "GET", Pattern: "/{owner}/{repo}", Handler: s.repoHome},
46 Route{Method: "GET", Pattern: "/{owner}/{repo}/tree/{ref}/{path...}", Handler: s.tree},
47 Route{Method: "GET", Pattern: "/{owner}/{repo}/blob/{ref}/{path...}", Handler: s.blob},
48 Route{Method: "GET", Pattern: "/{owner}/{repo}/blame/{ref}/{path...}", Handler: s.blame},
49 Route{Method: "GET", Pattern: "/{owner}/{repo}/search", Handler: s.search},
50 Route{Method: "GET", Pattern: "/{owner}/{repo}/milestones", Handler: s.milestones},
51 Route{Method: "GET", Pattern: "/{owner}/{repo}/wiki", Handler: s.wiki},
52 Route{Method: "GET", Pattern: "/{owner}/{repo}/wiki/_raw/{path...}", Handler: s.wikiRaw},
53 Route{Method: "GET", Pattern: "/{owner}/{repo}/wiki/{page}", Handler: s.wiki},
54 Route{Method: "GET", Pattern: "/{owner}/{repo}/releases", Handler: s.releases},
55 Route{Method: "GET", Pattern: "/{owner}/{repo}/builds", Handler: s.builds},
56 Route{Method: "GET", Pattern: "/{owner}/{repo}/builds/{n}", Handler: s.build},
57 Route{Method: "GET", Pattern: "/{owner}/{repo}/releases/download/{tag}/{name}", Handler: s.releaseAsset},
58 Route{Method: "GET", Pattern: "/{owner}/{repo}/raw/{ref}/{path...}", Handler: s.raw},
59 Route{Method: "GET", Pattern: "/{owner}/{repo}/log", Handler: s.log},
60 Route{Method: "GET", Pattern: "/{owner}/{repo}/log/{ref}", Handler: s.log},
61 Route{Method: "GET", Pattern: "/{owner}/{repo}/commit/{sha}", Handler: s.commit},
62 Route{Method: "GET", Pattern: "/{owner}/{repo}/refs", Handler: s.refs},
63 Route{Method: "GET", Pattern: "/{owner}/{repo}/archive/{file}", Handler: s.archive},
64 Route{Method: "GET", Pattern: "/{owner}/{repo}/issues", Handler: s.issues},
65 Route{Method: "GET", Pattern: "/{owner}/{repo}/issues/{n}", Handler: s.issue},
66 Route{Method: "GET", Pattern: "/{owner}/{repo}/mrs", Handler: s.mrs},
67 Route{Method: "GET", Pattern: "/{owner}/{repo}/mrs/{n}", Handler: s.mr},
68 )
69
70 // The JSON API is its own opt-in surface, independent of web.mode.
71 if s.cfg.API.Enabled {
72 routes = append(routes,
73 Route{Method: "POST", Pattern: "/api/v1/cmd", Mutating: true, Handler: s.apiCmd},
74 )
75 }
76
77 // Account-mode routes exist only when web.mode = "accounts". In
78 // view_only they are never registered — the structural guarantee.
79 if s.cfg.Web.Mode == "accounts" {
80 routes = append(routes,
81 Route{Method: "GET", Pattern: "/login", Handler: s.login, Mutating: true}, // consumes a one-time token
82 Route{Method: "POST", Pattern: "/logout", Mutating: true,
83 Handler: s.checkOrigin(s.logout)},
84 Route{Method: "GET", Pattern: "/new", Handler: s.requireUser(s.newRepoForm)},
85 )
86 // Web signup fronts the same registration path as SSH register,
87 // so it exists only when registration is open or invite.
88 if s.cfg.Registration.Mode != "closed" {
89 routes = append(routes,
90 Route{Method: "GET", Pattern: "/register", Handler: s.signupForm},
91 Route{Method: "POST", Pattern: "/register", Mutating: true,
92 Handler: s.checkOrigin(s.signupSubmit)},
93 )
94 }
95 routes = append(routes,
96 Route{Method: "POST", Pattern: "/new", Mutating: true,
97 Handler: s.checkOrigin(s.requireUser(s.newRepoSubmit))},
98 Route{Method: "POST", Pattern: "/{owner}/{repo}/pin", Mutating: true,
99 Handler: s.checkOrigin(s.requireUser(s.pinToggle))},
100 Route{Method: "GET", Pattern: "/{owner}/{repo}/issues/new",
101 Handler: s.requireUser(s.issueCreateForm)},
102 Route{Method: "POST", Pattern: "/{owner}/{repo}/issues/new", Mutating: true,
103 Handler: s.checkOrigin(s.requireUser(s.issueCreateSubmit))},
104 Route{Method: "POST", Pattern: "/{owner}/{repo}/issues/{n}/comment", Mutating: true,
105 Handler: s.checkOrigin(s.requireUser(s.issueCommentSubmit))},
106 Route{Method: "POST", Pattern: "/{owner}/{repo}/issues/{n}/edit", Mutating: true,
107 Handler: s.checkOrigin(s.requireUser(s.issueEditSubmit))},
108 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/{n}/edit", Mutating: true,
109 Handler: s.checkOrigin(s.requireUser(s.mrEditSubmit))},
110 Route{Method: "POST", Pattern: "/{owner}/{repo}/mrs/{n}/comment", Mutating: true,
111 Handler: s.checkOrigin(s.requireUser(s.mrCommentSubmit))},
112 Route{Method: "GET", Pattern: "/{owner}/{repo}/edit/{ref}/{path...}",
113 Handler: s.requireUser(s.editForm)},
114 Route{Method: "POST", Pattern: "/{owner}/{repo}/edit/{ref}/{path...}", Mutating: true,
115 Handler: s.checkOrigin(s.requireUser(s.editSubmit))},
116 )
117 }
118 return routes
119}
120
121func (s *Server) Handler() http.Handler {
122 mux := http.NewServeMux()
123 for _, r := range s.Routes() {
124 mux.HandleFunc(r.Method+" "+r.Pattern, r.Handler)
125 }
126 var h http.Handler = mux
127 if len(s.cfg.GoImport) > 0 {
128 h = s.goImportHandler(mux)
129 }
130 // Always wrapped: custom pages domains work with or without the
131 // built-in [pages] domain.
132 return s.pagesRouter(s.securityHeaders(h))
133}
134
135// securityHeaders sets defensive response headers on every reply. The CSP
136// is strict where it can be: no scripts at all (the UI needs none), no
137// plugins, no embedding. Inline styles are allowed because label chips
138// carry their color inline (chroma is class-based so the syntax palette
139// can follow the color scheme). Images may load from anywhere so external README images
140// still render; they are the one thing a reader-facing forge can't police
141// without a proxy.
142func (s *Server) securityHeaders(next http.Handler) http.Handler {
143 const csp = "default-src 'self'; script-src 'none'; style-src 'self' 'unsafe-inline'; " +
144 "img-src * data:; object-src 'none'; base-uri 'none'; form-action 'self'; frame-ancestors 'none'"
145 return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
146 hd := w.Header()
147 hd.Set("Content-Security-Policy", csp)
148 hd.Set("X-Frame-Options", "DENY")
149 hd.Set("X-Content-Type-Options", "nosniff")
150 hd.Set("Referrer-Policy", "no-referrer")
151 hd.Set("Cross-Origin-Opener-Policy", "same-origin")
152 if s.cfg.HTTP.TLS != "off" {
153 hd.Set("Strict-Transport-Security", "max-age=31536000; includeSubDomains")
154 }
155 next.ServeHTTP(w, r)
156 })
157}
158
159func (s *Server) goImportHandler(mux http.Handler) http.Handler {
160 // Vanity Go modules: ?go-get=1 requests under a configured module
161 // path answer with the go-import meta tag before normal routing.
162 return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
163 if r.URL.Query().Get("go-get") == "1" {
164 host := r.Host
165 if h, _, err := net.SplitHostPort(host); err == nil {
166 host = h
167 }
168 requested := host + strings.TrimSuffix(r.URL.Path, "/")
169 for module, repo := range s.cfg.GoImport {
170 if requested == module || strings.HasPrefix(requested, module+"/") {
171 w.Header().Set("Content-Type", "text/html; charset=utf-8")
172 fmt.Fprintf(w, `<!DOCTYPE html><html><head><meta name="go-import" content="%s git %s/%s.git"></head><body>%s</body></html>`,
173 module, s.cfg.Server.SiteURL, repo, module)
174 return
175 }
176 }
177 }
178 mux.ServeHTTP(w, r)
179 })
180}