multipart no longer depends on Promise

doc/api.txt

@@ -1254,18 +1254,21 @@ Node.  To use it, +require("multipart")+.
   +
   See the Stream class below.
 
-+multipart.cat(message)+ ::
-  Returns a promise.
-  - on success: Returns a multipart.Stream object representing the completed
-                message.  The body of each part is saved on the `body` member.
-  - on error: Returns an instanceof Error object.  This indicates
-              that the message was malformed in some way.
-  +
-  *Note*: This function saves the *entire* message into memory.  As such,
-  it is ill-suited to parsing actual incoming messages from an HTTP request!
++multipart.cat(message, callback)+ ::
+  On success, +callback+ is called with +(null, stream)+ where +stream+ is a
+  +multipart.Stream+ object representing the completed message.  The body of
+  each part is saved on the `body` member.
+  +
+  On error, +callback+ is called with +(err)+ where +err+ is an instanceof
+  the +Error+ object.  This indicates that the message was malformed in some
+  way.
+  +
+  *Note*: This function saves the *entire* message into memory.  As such, it
+  is ill-suited to parsing actual incoming messages from an HTTP request!
   If a user uploads a very large file, then it may cause serious problems.
   No checking is done to ensure that the file does not overload the memory.
-  Only use multipart.cat with known and trusted input!
+  Only use +multipart.cat+ with known and trusted input!
+
 
 === +multipart.Stream+
 

lib/multipart.js

@@ -37,9 +37,8 @@ function parse (message) {
 // rack up as much memory usage as they can manage.  This function
 // buffers the whole message, which is very convenient, but also
 // very much the wrong thing to do in most cases.
-function cat (message) {
-  var p = new (events.Promise),
-    stream = parse(message);
+function cat (message, callback) {
+  var stream = parse(message);
   stream.files = {};
   stream.fields = {};
   stream.addListener("partBegin", function (part) {
@@ -49,9 +48,12 @@ function cat (message) {
   stream.addListener("body", function (chunk) {
     stream.part.body = (stream.part.body || "") + chunk;
   });
-  stream.addListener("error", function (e) { p.emitError(e) });
-  stream.addListener("complete", function () { p.emitSuccess(stream) });
-  return p;
+  stream.addListener("error", function (e) { p.emitError(e)
+    if (callback) callback(e);
+  });
+  stream.addListener("complete", function () {
+    if (callback) callback(null, stream);
+  });
 };
 
 // events: