diff --git a/lib/utils.js b/lib/utils.js
index 6dcbc41ed..732e8b3cd 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -84,29 +84,45 @@ var getUrl = exports.getUrl = function(url, options) {
                 })
                 .on('response', function(res) {
 
-                    if (supportGzip && ['gzip', 'deflate'].indexOf(res.headers['content-encoding']) > -1) {
-
-                        var gunzip = zlib.createUnzip();
-                        gunzip.request = res.request;
-                        gunzip.statusCode = res.statusCode;
-                        gunzip.headers = res.headers;
-
-                        if (!options.asBuffer) {
-                            gunzip.setEncoding("binary");
-                        }
-
-                        req.emit('response', gunzip);
-
-                        res.pipe(gunzip);
-
-                    } else {
-
-                        if (!options.asBuffer) {
-                            res.setEncoding("binary");
-                        }
-
-                        req.emit('response', res);
-                    }
+                    var contentEncoding = res.headers['content-encoding'] || 'identity';
+	                contentEncoding = contentEncoding.trim().toLowerCase();
+	
+	                var zlibOptions = {
+		                flush: zlib.Z_SYNC_FLUSH,
+                        finishFlush: zlib.Z_SYNC_FLUSH
+	                };
+	
+	                if (contentEncoding === 'gzip') {
+		                var gunzip = zlib.createGunzip(zlibOptions);
+		                gunzip.request = res.request;
+		                gunzip.statusCode = res.statusCode;
+		                gunzip.headers = res.headers;
+		
+		                if (!options.asBuffer) {
+			                gunzip.setEncoding("binary");
+		                }
+		                
+		                req.emit('response', gunzip);
+		                res.pipe(gunzip);
+	                } else if (contentEncoding === 'deflate') {
+		                var inflate = zlib.createInflate(zlibOptions);
+		                inflate.request = res.request;
+		                inflate.statusCode = res.statusCode;
+		                inflate.headers = res.headers;
+		
+		                if (!options.asBuffer) {
+			                inflate.setEncoding("binary");
+		                }
+		                
+		                req.emit('response', inflate);
+		                res.pipe(inflate);
+	                } else {
+		                if (!options.asBuffer) {
+			                res.setEncoding("binary");
+		                }
+		
+		                req.emit('response', res);
+	                }
                 });
 
             req.emit('request', r);