Add fetch debug endpoint for requesting an url as a user

web/debug/users.go

@@ -295,3 +295,36 @@ func kickoffFollow(w http.ResponseWriter, r *http.Request) {
 	dec := json.NewDecoder(r.Body)
 	dec.Decode(&data)
 }
+
+func requestAs(w http.ResponseWriter, r *http.Request) {
+	type Inbound struct {
+		Username  string
+		TargetUrl string
+	}
+	log := hlog.FromRequest(r)
+	data := Inbound{}
+	dec := json.NewDecoder(r.Body)
+	err := dec.Decode(&data)
+	if err != nil {
+		log.Warn().Err(err).Msg("Failed to decode json body")
+		webutils.ProblemDetailsStatusOnly(w, http.StatusInternalServerError)
+		return
+	}
+	user, err := dbgen.User.GetByUsername(data.Username)
+	if err != nil {
+		webutils.ProblemDetailsStatusOnly(w, http.StatusNotFound)
+		return
+	}
+	res, _, err := webshared.RequestSigned("GET", data.TargetUrl, nil, user)
+	if err != nil {
+		log.Warn().Err(err).Msg("Request failed")
+		webutils.ProblemDetailsStatusOnly(w, http.StatusInternalServerError)
+		return
+	}
+	if res.StatusCode != 200 {
+		webutils.ProblemDetailsStatusOnly(w, res.StatusCode)
+		return
+	}
+	body, _ := io.ReadAll(res.Body)
+	fmt.Fprint(w, string(body))
+}