| 1 | package server |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "log" |
| 6 | "net/http" |
| 7 | "strconv" |
| 8 | "time" |
| 9 | |
| 10 | "github.com/go-git/go-git/v6/plumbing/transport" |
| 11 | |
| 12 | "go.bigb.es/curator/internal/config" |
| 13 | "go.bigb.es/curator/internal/dochtml" |
| 14 | "go.bigb.es/curator/internal/git" |
| 15 | "go.bigb.es/curator/internal/metrics" |
| 16 | "go.bigb.es/curator/internal/storage" |
| 17 | "go.bigb.es/curator/internal/store" |
| 18 | ) |
| 19 | |
| 20 | // OIDCSessionValidator validates OIDC session cookies. |
| 21 | type OIDCSessionValidator interface { |
| 22 | ValidateSession(value string) string |
| 23 | } |
| 24 | |
| 25 | type Server struct { |
| 26 | Cfg *config.Config |
| 27 | Resolver store.ModuleResolver |
| 28 | Credentials store.CredentialResolver |
| 29 | ModuleLister store.ModuleLister |
| 30 | Git *git.Cache |
| 31 | Store storage.Storage |
| 32 | AuthTokens map[string]struct{} |
| 33 | OIDCProvider OIDCSessionValidator |
| 34 | HTTPClient *http.Client |
| 35 | DocRenderer *dochtml.Renderer |
| 36 | } |
| 37 | |
| 38 | // authForModule returns a transport.AuthMethod for the given module's credential, |
| 39 | // or nil if none is configured. |
| 40 | func (s *Server) authForModule(mod config.Module) transport.AuthMethod { |
| 41 | if mod.CredentialName == "" || s.Credentials == nil { |
| 42 | return nil |
| 43 | } |
| 44 | cred, err := s.Credentials.GetCredential(mod.CredentialName) |
| 45 | if err != nil { |
| 46 | log.Printf("credential %q lookup failed: %v", mod.CredentialName, err) |
| 47 | return nil |
| 48 | } |
| 49 | auth, err := git.AuthMethodFromCredential(cred.Type, cred.Data) |
| 50 | if err != nil { |
| 51 | log.Printf("credential %q build failed: %v", mod.CredentialName, err) |
| 52 | return nil |
| 53 | } |
| 54 | return auth |
| 55 | } |
| 56 | |
| 57 | func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) { |
| 58 | handler := "import" |
| 59 | start := time.Now() |
| 60 | |
| 61 | rw := &responseWriter{ResponseWriter: w, code: http.StatusOK} |
| 62 | |
| 63 | defer func() { |
| 64 | metrics.HTTPRequestsTotal.WithLabelValues(handler, r.Method, strconv.Itoa(rw.code)).Inc() |
| 65 | metrics.HTTPRequestDuration.WithLabelValues(handler).Observe(time.Since(start).Seconds()) |
| 66 | }() |
| 67 | |
| 68 | // Handle GOPROXY @latest requests. |
| 69 | if escapedModPath, ok := ParseLatestPath(r.URL.Path); ok { |
| 70 | handler = "proxy" |
| 71 | s.serveLatest(rw, r, escapedModPath) |
| 72 | return |
| 73 | } |
| 74 | |
| 75 | // Handle GOPROXY requests. |
| 76 | if modName, file, ok := ParseProxyPath(r.URL.Path); ok { |
| 77 | handler = "proxy" |
| 78 | s.serveProxy(rw, r, modName, file) |
| 79 | return |
| 80 | } |
| 81 | |
| 82 | if r.URL.Path == "/" && r.URL.Query().Get("go-get") != "1" { |
| 83 | handler = "landing" |
| 84 | s.serveLanding(rw, r) |
| 85 | return |
| 86 | } |
| 87 | |
| 88 | // Resolve the module name from the URL path, trying multi-segment names. |
| 89 | resolver := func(name string) bool { |
| 90 | _, ok := s.Resolver.ResolveModule(name) |
| 91 | return ok |
| 92 | } |
| 93 | name, _, _ := ResolveModulePath(r.URL.Path, resolver) |
| 94 | if name == "" { |
| 95 | http.NotFound(rw, r) |
| 96 | return |
| 97 | } |
| 98 | |
| 99 | if !s.CanAccessModule(name, r) { |
| 100 | http.NotFound(rw, r) |
| 101 | return |
| 102 | } |
| 103 | |
| 104 | mod, _ := s.Resolver.ResolveModule(name) |
| 105 | |
| 106 | importPrefix := s.Cfg.Host + "/" + name |
| 107 | |
| 108 | // If not a go-get request, serve documentation. |
| 109 | if r.URL.Query().Get("go-get") != "1" { |
| 110 | if s.DocRenderer != nil { |
| 111 | handler = "docs" |
| 112 | s.serveDocs(rw, r) |
| 113 | return |
| 114 | } |
| 115 | |
| 116 | if mod.Web != "" { |
| 117 | http.Redirect(rw, r, mod.Web, http.StatusTemporaryRedirect) |
| 118 | return |
| 119 | } |
| 120 | |
| 121 | http.NotFound(rw, r) |
| 122 | return |
| 123 | } |
| 124 | |
| 125 | rw.Header().Set("Content-Type", "text/html; charset=utf-8") |
| 126 | fmt.Fprintf(rw, `<!DOCTYPE html> |
| 127 | <html> |
| 128 | <head> |
| 129 | <meta name="go-import" content="%s %s %s"> |
| 130 | <meta http-equiv="refresh" content="0; url=%s"> |
| 131 | </head> |
| 132 | <body> |
| 133 | Redirecting to <a href="%s">%s</a>... |
| 134 | </body> |
| 135 | </html> |
| 136 | `, importPrefix, mod.VCS, mod.Repo, mod.Web, mod.Web, mod.Web) |
| 137 | } |
| 138 | |