Set content-length: 0 on POST with empty data to support dumb servers

Author: driverdan

lib/XMLHttpRequest.js

@@ -327,14 +327,18 @@ exports.XMLHttpRequest = function() {
     }
 
     // Set content length header
-    if (settings.method == "GET" || settings.method == "HEAD") {
+    if (settings.method === "GET" || settings.method === "HEAD") {
       data = null;
     } else if (data) {
       headers["Content-Length"] = Buffer.byteLength(data);
 
       if (!headers["Content-Type"]) {
         headers["Content-Type"] = "text/plain;charset=UTF-8";
       }
+    } else if (settings.method === "POST") {
+      // For a post with no data set Content-Length: 0.
+      // This is required by buggy servers that don't meet the specs.
+      headers["Content-Length"] = 0;
     }
 
     var options = {