105 lines
2.9 KiB
Go
105 lines
2.9 KiB
Go
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package main
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import (
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"encoding/base64"
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"fmt"
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"net/http"
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"net/url"
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"strings"
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)
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func (this *Application) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if r.Method == `GET` {
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if r.URL.Path == `/` {
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this.Homepage(w, r)
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} else if r.URL.Path == `/favicon.ico` {
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w.Header().Set(`Location`, `/static/logo.png`)
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w.WriteHeader(301)
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} else if r.URL.Path == `/robots.txt` {
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http.Error(w, "not found", 404)
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} else if parts := this.rxRepoImage.FindStringSubmatch(r.URL.Path); parts != nil {
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this.Bannerpage(w, r, parts[1])
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} else if parts := this.rxRepoPage.FindStringSubmatch(r.URL.Path); parts != nil {
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// Support /repo.html URIs for backward compatibility
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if strings.HasSuffix(parts[1], `.html`) {
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w.Header().Set(`Location`, r.URL.Path[0:len(r.URL.Path)-5])
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w.WriteHeader(301)
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return
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}
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// The regexp supports an optional trailing slash
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// Redirect to canonical no-trailing-slash
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if strings.HasSuffix(r.URL.Path, `/`) {
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w.Header().Set(`Location`, `/`+parts[1]) // n.b. parts[1] isn't urldecoded yet
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w.WriteHeader(301)
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return
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}
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// Proper decoding of special characters in repo path component
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repoName, err := url.PathUnescape(parts[1])
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if err != nil {
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http.Error(w, "malformed url encoding in repository name", 400)
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return
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}
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// Maybe it's a redirected project (alternative name)
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if rename, ok := this.cfg.Redirect[repoName]; ok {
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w.Header().Set(`Location`, `/`+url.PathEscape(rename))
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w.WriteHeader(301)
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return
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}
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this.Repopage(w, r, repoName)
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} else if r.URL.Path == `/static/logo.png` {
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if this.cfg.Template.CustomLogoPngBase64 != "" {
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logoPng, err := base64.StdEncoding.DecodeString(this.cfg.Template.CustomLogoPngBase64)
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if err != nil {
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this.internalError(w, r, fmt.Errorf("parsing base64 logo: %w", err))
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return
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}
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w.Header().Set(`Content-Length`, fmt.Sprintf("%d", len(logoPng)))
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w.Header().Set(`Content-Type`, `image/png`)
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w.WriteHeader(200)
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w.Write(logoPng)
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} else {
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r.URL.Path = r.URL.Path[8:]
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http.FileServer(http.Dir(`static`)).ServeHTTP(w, r)
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}
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} else if strings.HasPrefix(r.URL.Path, `/static/`) {
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r.URL.Path = r.URL.Path[8:]
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http.FileServer(http.Dir(`static`)).ServeHTTP(w, r)
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} else if r.URL.Query().Get("go-get") == "1" {
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// This wasn't one of our standard `/repo` paths, but there is the ?go-get=1 parameter
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// It must be a subpackage request
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// We can't serve the proper go-import meta tag immediately because
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// we haven't looked up the go.mod yet. Just redirect to the root
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// package - `go get` will follow redirects and the resulting meta tag is correct
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slashParts := strings.SplitN(r.URL.Path, `/`, 3) // len === 3 is guaranteed from earlier if cases
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w.Header().Set(`Location`, `/`+slashParts[1])
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w.WriteHeader(301)
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return
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} else {
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http.Error(w, "not found", 404)
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}
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} else {
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http.Error(w, "invalid method", 400)
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}
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}
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