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