How to read cookie in nsIChannel? - firefox

Question

const {Cc,Ci,Cr} = require("chrome");
function TracingListener() {
//this.receivedData = [];
}
function CCIN(cName, ifaceName) {
return Cc[cName].createInstance(Ci[ifaceName]);
}
function CCSV(cName, ifaceName){
if (Cc[cName])
// if fbs fails to load, the error can be _CC[cName] has no properties
return Cc[cName].getService(Ci[ifaceName]);
};
TracingListener.prototype =
{
originalListener: null,
receivedData: null, // array for incoming data.
onDataAvailable: function(request, context, inputStream, offset, count)
{
this.originalListener.onDataAvailable(request, context,inputStream, offset, count);
},
onStartRequest: function(request, context) {
this.receivedData = [];
this.originalListener.onStartRequest(request, context);
//thechannel.setRequestHeader("X-Hello", "World", false);
//this part of code will stop the request
/*request.QueryInterface(Ci.nsIHttpChannel);
var cookie=request.getRequestHeader("Cookie");
console.log("cookie="+cookie);*/
var postText = this.readPostTextFromRequest(request, context);
console.log("postText="+postText111);
},
onStopRequest: function(request, context, statusCode)
{
//this part of code will successfullly print the cookie
/*request.QueryInterface(Ci.nsIHttpChannel);
var cookie=request.getRequestHeader("Cookie");
console.log("cookie="+cookie);*/
this.originalListener.onStopRequest(request, context, statusCode);
},
QueryInterface: function (aIID) {
if (aIID.equals(Ci.nsIStreamListener) ||
aIID.equals(Ci.nsISupports)) {
return this;
}
throw Cr.NS_NOINTERFACE;
},
readPostTextFromRequest : function(request, context) {
try
{
var is = request.QueryInterface(Ci.nsIUploadChannel).uploadStream;
if (is)
{
var ss = is.QueryInterface(Ci.nsISeekableStream);
var prevOffset;
if (ss)
{
prevOffset = ss.tell();
ss.seek(Ci.nsISeekableStream.NS_SEEK_SET, 0);
}
// Read data from the stream..
var charset = "UTF-8";
var text = this.readFromStream(is, charset, true);
// Seek locks the file so, seek to the beginning only if necko hasn't read it yet,
// since necko doesn't seek to 0 before reading (at lest not till 459384 is fixed).
if (ss && prevOffset == 0)
ss.seek(Ci.nsISeekableStream.NS_SEEK_SET, 0);
return text;
}
else {
//dump("Failed to Query Interface for upload stream.\n");
}
}
catch(exc)
{
//dumpError(exc);
}
return null;
},
readFromStream : function(stream, charset, noClose) {
var sis = CCSV("#mozilla.org/binaryinputstream;1", "nsIBinaryInputStream");
sis.setInputStream(stream);
var segments = [];
for (var count = stream.available(); count; count = stream.available())
segments.push(sis.readBytes(count));
if (!noClose)
sis.close();
var text = segments.join("");
return text;
}
}
hRO = {
observe: function(request, aTopic, aData){
try {
if (aTopic == "http-on-examine-response") {
request.QueryInterface(Ci.nsIHttpChannel);
//if (request.originalURI && piratequesting.baseURL == request.originalURI.prePath && request.originalURI.path.indexOf("/index.php?ajax=") == 0) {
var newListener = new TracingListener();
request.QueryInterface(Ci.nsITraceableChannel);
newListener.originalListener = request.setNewListener(newListener);
//}
}
} catch (e) {
/*dump("\nhRO error: \n\tMessage: " + e.message + "\n\tFile: " + e.fileName + " line: " + e.lineNumber + "\n");*/
}
},
QueryInterface: function(aIID){
if (aIID.equals(Ci.nsIObserver) ||
aIID.equals(Ci.nsISupports)) {
return this;
}
throw Cr.NS_NOINTERFACE;
},
};
var observerService = Cc["#mozilla.org/observer-service;1"]
.getService(Ci.nsIObserverService);
observerService.addObserver(hRO,
"http-on-examine-response", false);
My question is: the same lines of code:
request.QueryInterface(Ci.nsIHttpChannel);
var cookie=request.getRequestHeader("Cookie");
console.log("cookie="+cookie);
performs different results in onStartRequest and onStopRequest, why?
I can read the cookie in onStopRequest but fails in onStartRequest. I don't think the request is not ready in onStartRequest because I can read the postText in onStartRequest.