90 lines
2.2 KiB
Go
90 lines
2.2 KiB
Go
package main
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import (
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"context"
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_ "embed"
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"net/http"
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"net/http/httputil"
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"net/url"
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"strconv"
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"strings"
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"github.com/uptrace/bunrouter"
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"lure.sh/lure/pkg/search"
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)
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type pkgCtxKey struct{}
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//go:embed static/icons/badge-logo.base64
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var logoData string
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// registerBadge registers the route for generating LURE badges
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func registerBadge(mux *bunrouter.Router) {
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// rp is a reverse proxy that will route user requests to shields.io
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// and return the responses, stripped of any irrelevant headers.
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rp := &httputil.ReverseProxy{
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Rewrite: func(pr *httputil.ProxyRequest) {
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pkg := pr.In.Context().Value(pkgCtxKey{}).(search.Package)
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pr.Out.URL = genBadgeURL(pkg, pr.In.URL.Query().Get("style"))
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pr.Out.Host = pr.Out.URL.Host
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},
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ModifyResponse: func(r *http.Response) error {
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// Remove all the irrelevant headers from the response.
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r.Header.Del("Alt-Svc")
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r.Header.Del("Cache-Control")
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r.Header.Del("Report-To")
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r.Header.Del("Cf-Cache-Status")
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r.Header.Del("Cf-Ray")
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r.Header.Del("Fly-Request-Id")
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r.Header.Del("Nel")
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r.Header.Del("Report-To")
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r.Header.Del("Server")
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r.Header.Del("Via")
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r.Header.Del("Set-Cookie")
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return nil
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},
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}
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mux.GET("/pkg/:repo/:pkg/badge.svg", func(w http.ResponseWriter, req bunrouter.Request) error {
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repo := req.Param("repo")
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name := req.Param("pkg")
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pkg, err := search.GetPkg(req.Context(), repo, name)
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if err != nil {
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return err
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}
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ctx := context.WithValue(req.Context(), pkgCtxKey{}, pkg)
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rp.ServeHTTP(w, req.Request.WithContext(ctx))
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return nil
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})
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}
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func genBadgeURL(pkg search.Package, style string) *url.URL {
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v := url.Values{}
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v.Set("label", pkg.Name)
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v.Set("message", genBadgeVersion(pkg))
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v.Set("logo", logoData)
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v.Set("color", "0060A8")
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if style != "" {
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v.Set("style", style)
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}
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return &url.URL{Scheme: "https", Host: "img.shields.io", Path: "/static/v1", RawQuery: v.Encode()}
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}
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func genBadgeVersion(pkg search.Package) string {
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sb := strings.Builder{}
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if pkg.Epoch != 0 {
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sb.WriteString(strconv.Itoa(int(pkg.Epoch)))
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sb.WriteByte(':')
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}
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sb.WriteString(pkg.Version)
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if pkg.Release != 0 {
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sb.WriteByte('-')
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sb.WriteString(strconv.Itoa(pkg.Release))
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}
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return sb.String()
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}
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