From 396afb8a87451af639773c5a8ee6b6c4da6afb6d Mon Sep 17 00:00:00 2001
From: Will Norris <will@willnorris.com>
Date: Fri, 15 May 2015 22:27:44 -0700
Subject: [PATCH] proxy non-200 responses with original status code

Some sites return a 404 image, and most browsers render them properly.
We should pass them along as well.

see also: atmos/camo#75 and atmos/camo#77
---
 imageproxy.go | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/imageproxy.go b/imageproxy.go
index eda0ec2..ee000da 100644
--- a/imageproxy.go
+++ b/imageproxy.go
@@ -113,13 +113,6 @@ func (p *Proxy) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	cached := resp.Header.Get(httpcache.XFromCache)
 	glog.Infof("request: %v (served from cache: %v)", *req, cached == "1")
 
-	if resp.StatusCode != http.StatusOK {
-		msg := fmt.Sprintf("remote URL %q returned status: %v", req.URL, resp.Status)
-		glog.Error(msg)
-		http.Error(w, msg, resp.StatusCode)
-		return
-	}
-
 	copyHeader(w, resp, "Last-Modified")
 	copyHeader(w, resp, "Expires")
 	copyHeader(w, resp, "Etag")
@@ -131,6 +124,7 @@ func (p *Proxy) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
 	copyHeader(w, resp, "Content-Length")
 	copyHeader(w, resp, "Content-Type")
+	w.WriteHeader(resp.StatusCode)
 	io.Copy(w, resp.Body)
 }