From b9f1a1f71a5b177565e6a0c731a7f20c73f05285 Mon Sep 17 00:00:00 2001
From: John Beisley <greatred@gmail.com>
Date: Thu, 2 Jan 2014 22:13:21 +0000
Subject: [PATCH] Reduce headers written by httpu, in case this confuses some
 devices.

---
 httpu/httpu.go | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/httpu/httpu.go b/httpu/httpu.go
index 388d48c..1b34c25 100644
--- a/httpu/httpu.go
+++ b/httpu/httpu.go
@@ -47,10 +47,24 @@ func (httpu *HTTPUClient) Do(req *http.Request, timeout time.Duration, numSends
 	httpu.connLock.Lock()
 	defer httpu.connLock.Unlock()
 
+	// Create the request. This is a subset of what http.Request.Write does
+	// deliberately to avoid creating extra fields which may confuse some
+	// devices.
 	var requestBuf bytes.Buffer
-	if err := req.Write(&requestBuf); err != nil {
+	method := req.Method
+	if method == "" {
+		method = "GET"
+	}
+	if _, err := fmt.Fprintf(&requestBuf, "%s %s HTTP/1.1\r\n", method, req.URL.RequestURI()); err != nil {
 		return nil, err
 	}
+	if err := req.Header.Write(&requestBuf); err != nil {
+		return nil, err
+	}
+	if _, err := requestBuf.Write([]byte{'\r', '\n'}); err != nil {
+		return nil, err
+	}
+
 	destAddr, err := net.ResolveUDPAddr("udp", req.Host)
 	if err != nil {
 		return nil, err