tjh.dev
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tangled.org/core
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appview: state: add GoImport middleware
This serves the go-import meta tag if the user-agent is
Go-http-client/1.1 and there's a ?go-get=1 query parameter present. This
should run before the router 404's a path that technically doesn't exist
like tangled.sh/foo.com/some-go/v5.
anirudh.fi
+34
-1
appview/state/middleware.go
+34
-1
appview/state/middleware.go
···
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3
import (
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4
"context"
5
+
"fmt"
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"log"
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"net/http"
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"strconv"
···
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if err != nil {
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// invalid did or handle
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log.Println("failed to resolve repo")
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-
w.WriteHeader(http.StatusNotFound)
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s.pages.Error404(w)
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return
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}
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···
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})
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}
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}
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+
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// this should serve the go-import meta tag even if the path is technically
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+
// a 404 like tangled.sh/oppi.li/go-git/v5
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+
func GoImport(s *State) middleware.Middleware {
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+
return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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f, err := s.fullyResolvedRepo(r)
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if err != nil {
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log.Println("failed to fully resolve repo", err)
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http.Error(w, "invalid repo url", http.StatusNotFound)
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return
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}
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+
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fullName := f.OwnerHandle() + "/" + f.RepoName
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+
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if r.Header.Get("User-Agent") == "Go-http-client/1.1" {
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if r.URL.Query().Get("go-get") == "1" {
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html := fmt.Sprintf(
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`<meta name="go-import" content="tangled.sh/%s git https://tangled.sh/%s"/>`,
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+
fullName,
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+
fullName,
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)
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w.Header().Set("Content-Type", "text/html")
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w.Write([]byte(html))
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return
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}
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}
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+
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next.ServeHTTP(w, r)
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})
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}
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+
}