Merge pull request #11 from valsaven/master

fix(http): Fix wrong counting of content length for non-ASCII strings

lib/http.js

@@ -286,8 +286,22 @@ ClientRequest.prototype.send = function(follow) {
 			});
 		}
 	} else {
+		function byteLength(str) {
+			// Returns the byte length of an utf8 string
+			var s = str.length;
+
+			for (var i = str.length - 1; i >= 0; i--) {
+				var code = str.charCodeAt(i);
+				if (code > 0x7f && code <= 0x7ff) s++;
+				else if (code > 0x7ff && code <= 0xffff) s+=2;
+				if (code >= 0xDC00 && code <= 0xDFFF) i--; // Trail surrogate
+			}
+
+			return s;
+		}
+
 		post = this.post;
-		this.header({"Content-Length": post.length});
+		this.header({"Content-Length": byteLength(post)});
 	}
 
 	/* build request */