CODEWITHSUNDEEP
firefoxbuildfirefox-addonfirefox-addon-sdk
Richard William
Richard William

Reputation: 23

How can I compile this extension for firefox?

How can I compile this into a firefox addon? I have tried to use firefox's addon builder located at https://builder.addons.mozilla.org but when I click test it says "XPI not built". Can anybody tell me how I may turn this code into a function firefox extension? Thank you. 

//create an nsIObserver implementor
  var listener = {
observe : function(aSubject, aTopic, aData) {
      var httpChannel = aSubject.QueryInterface(Components.interfaces.nsIHttpChannel);


      if (aTopic == "http-on-modify-request") {

        var channel= aSubject.QueryInterface(Components.interfaces.nsIHttpChannel);

        if(channel.requestMethod == "POST")
        {

            channel=channel.QueryInterface(Components.interfaces.nsIUploadChannel);  
            channel = channel.uploadStream;  
            channel.QueryInterface(Components.interfaces.nsISeekableStream)
                            .seek(Components.interfaces.nsISeekableStream.NS_SEEK_SET,    0);  
            var stream = Components.classes["@mozilla.org/binaryinputstream;1"]
                                .createInstance(Components.interfaces.nsIBinaryInputStream);  
            stream.setInputStream(channel);  
            var postBytes = stream.readByteArray(stream.available());  
            poststr = String.fromCharCode.apply(null, postBytes);  

            //change the poststr

            // poststr=poststr.replace(....);  

            // ERROR HERE - stringStream is not defined
            stringStream.setData(poststr, poststr.length);  
            //changing the postdata  
            channel = channel.QueryInterface(Components.interfaces.nsIUploadChannel);  
            channel = channel.uploadStream;  
            channel = channel.QueryInterface(Components.interfaces.nsISeekableStream)
                      .seek(Components.interfaces.nsISeekableStream.NS_SEEK_SET, 0);  
                channel.uploadStream.QueryInterface(Components.interfaces.nsIMIMEInputStream);  
            channel.uploadStream.setData(stringStream);  
            channel.requestMethod = "POST";

        }

      }

},

QueryInterface : function(aIID) {
   if (aIID.equals(Components.interfaces.nsISupports) ||
        aIID.equals(Components.interfaces.nsIObserver))
     return this;
   throw Components.results.NS_NOINTERFACE;
}
 };

 var observerService = null;

var Init = {
addObserver : function(){
  observerService = Components.classes["@mozilla.org/observer-    service;1"].getService(Components.interfaces.nsIObserverService);
  observerService.addObserver(listener, "http-on-modify-request", false);
},

removeObserver : function(){
  observerService.removeObserver(listener, "http-on-modify-request");
}
};

Init.addObserver();

Upvotes: 1

Views: 2048

Answers (1)

Wladimir Palant
Wladimir Palant

Reputation: 57651

The example you have there is meant for a classic (XUL-based) extension, not for the Add-on SDK. You can still add that observer using the low-level observer-service API. Also, SDK-based extensions don't usually have access to the Components object, it requires chrome authority. Add the following code to your main.js file:

var observer = require("observer-service");
var {Cc, Ci} = require("chrome");

observer.add("http-on-modify-request", function(subject, data)
{
  var channel= subject.QueryInterface(Ci.nsIHttpChannel);

  if (channel.requestMethod == "POST")
  {
    channel = channel.QueryInterface(Ci.nsIUploadChannel);  
    channel = channel.uploadStream;
    channel.QueryInterface(Ci.nsISeekableStream)
           .seek(Ci.nsISeekableStream.NS_SEEK_SET, 0);
    var stream = Cc["@mozilla.org/binaryinputstream;1"]
                   .createInstance(Ci.nsIBinaryInputStream);  
    stream.setInputStream(channel);  
    var postBytes = stream.readByteArray(stream.available());  
    poststr = String.fromCharCode.apply(null, postBytes);  

    //change the poststr

    // poststr=poststr.replace(....);  

    // ERROR HERE - stringStream is not defined
    stringStream.setData(poststr, poststr.length);  
    //changing the postdata  
    channel = channel.QueryInterface(Ci.nsIUploadChannel);  
    channel = channel.uploadStream;  
    channel.QueryInterface(Ci.nsISeekableStream)
           .seek(Ci.nsISeekableStream.NS_SEEK_SET, 0);  
    channel.uploadStream.QueryInterface(Ci.nsIMIMEInputStream);  
    channel.uploadStream.setData(stringStream);  
    channel.requestMethod = "POST";
  }
});

Note that I merely replaced Components.classes by Cc and Components.interfaces by Ci in the code you provided - I'm not sure what this code is supposed to do but I am quite sure that it doesn't work.

Upvotes: 3

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