node.js - node, How to handle/catch pipe -


I have seen and read some tutorials which show that you can take a stream like a pipe and another Lego blocks , But I can not do anything to catch the pipe command while doing a stream pipe in an object.

What do I mean by how I create an object with a function, so that I can do this: 

  uploadWrapper = function (client, file, callback) {upload = function (client, file, callback) {var file = file // this.data = 'undefined' stream.WRitable.call (this); This.end = function () {if (this.Dataof this.data! == 'undefined') file.data = this.data callback (file.data, 200)} / var path = urlB.host ('upload' ) .object ('files', file.id) .action ('content'). Url // // client.upload (path, file, callback)} util.inherits (upload, stream. Proper) upload.prototype._write = task (piece, encoding, callback) {this.data = this.data + chunk.toString ('utf8') callback ()} new uploads (client, file, callback)} export.upload = uploadWrapper   
 How do I get data when pipe to my object Handle me  
 I have seen but I can not really get anything about this (maybe I have not seen in the places of writing?).  
 Can anyone tell me right direction?  
 If it helps to know, then I want to be able to catch all the data streams and create a string that contains data with binary encoding; Whether it is from a file stream or a request stream from a server (i.e. data from a multipart request file).  
 EDIT: I updated the code to log the data  
 EDIT: I have decided it, now I can get the pipe data, give me the code Had to put in the wrapper that returned the function to the stream.  
 EDIT: Now a different problem,  this.data  is not stored in the  _read  way in the upload code in  this. Data can be read .  
 EDIT: OK, now I can deal with callback and hold data, I need to know how this data is being pipe or if it is a normal function is being used.   
 
 
 If you want to create your own stream that can be piped with pipes and / or, Then see the node.

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