Fix rendering of the HTTP request line to match RFC-2616.

Author: jmalloc

CHANGELOG.md

@@ -10,6 +10,12 @@ The format is based on [Keep a Changelog], and this project adheres to
 [keep a changelog]: https://keepachangelog.com/en/1.0.0/
 [semantic versioning]: https://semver.org/spec/v2.0.0.html
 
+## Unreleased
+
+### Fixed
+
+- Fix rendering of the HTTP request line to match RFC-2616
+
 ## [0.3.3] - 2022-07-11
 
 ### Fixed

cmd/echo-server/main.go

@@ -251,7 +251,7 @@ func writeSSEField(
 
 // writeRequest writes request headers to w.
 func writeRequest(w io.Writer, req *http.Request) {
-	fmt.Fprintf(w, "%s %s %s\n", req.Proto, req.Method, req.URL)
+	fmt.Fprintf(w, "%s %s %s\n", req.Method, req.URL, req.Proto)
 	fmt.Fprintln(w, "")
 
 	fmt.Fprintf(w, "Host: %s\n", req.Host)