Add support for deflate content encoding

request.js

@@ -399,7 +399,7 @@ Request.prototype.init = function (options) {
   }
 
   if (self.gzip && !self.hasHeader('accept-encoding')) {
-    self.setHeader('accept-encoding', 'gzip')
+    self.setHeader('accept-encoding', 'gzip, deflate')
   }
 
   if (self.uri.auth && !self.hasHeader('authorization')) {
@@ -928,6 +928,9 @@ Request.prototype.onRequestResponse = function (response) {
       if (contentEncoding === 'gzip') {
         responseContent = zlib.createGunzip()
         response.pipe(responseContent)
+      } else if (contentEncoding === 'deflate') {
+        responseContent = zlib.createInflate()
+        response.pipe(responseContent)
       } else {
         // Since previous versions didn't check for Content-Encoding header,
         // ignore any invalid values to preserve backwards-compatibility

tests/test-gzip.js

@@ -31,6 +31,12 @@ var server = http.createServer(function(req, res) {
         res.end(data)
       })
     }
+  } else if (/\bdeflate\b/i.test(req.headers['accept-encoding'])) {
+    res.setHeader('Content-Encoding', 'deflate')
+    zlib.deflate(testContent, function (err, data) {
+      assert.equal(err, null)
+      res.end(data)
+    })
   } else {
     res.end(testContent)
   }
@@ -209,6 +215,18 @@ tape('pause before streaming from a gzip request object', function(t) {
   }, 100)
 })
 
+tape('transparently supports deflate decoding to callbacks', function(t) {
+  var options = { url: 'http://localhost:6767/foo', gzip: true, headers: { 'Accept-Encoding': 'deflate' } }
+
+  request.get(options, function(err, res, body) {
+    t.equal(err, null)
+    t.equal(res.headers['content-encoding'], 'deflate')
+    t.equal(body, testContent)
+    t.end()
+  })
+})
+
+
 tape('cleanup', function(t) {
   server.close(function() {
     t.end()