nsITraceableChannel，拦截HTTP通信代码 [英] nsITraceableChannel, Intercept HTTP Traffic code
本文介绍了nsITraceableChannel，拦截HTTP通信代码的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
nsITraceableChannel，拦截HTTP流量并从如何从nsITraceableChannel获得一个url？，我一直在寻找答案，没有运气。
我想要做的是截取某些链接，并改变它们。
欢迎任何帮助
我得到的错误是函数声明需要一个名字 witch指向 observe：function aSubject，aTopic，aData）部分代码
const Cc = Components.classes; const Ci = Components.interfaces; var observerService = Cc [@ mozilla.org/observer-service;1] .getService（Ci.nsIObserverService）; observerService.addObserver（httpRequestObserver，http-on- （）;）;} ----------------------- --------------------------------- var httpRequestObserver = {observe：function（aSubject，aTopic，aData）{if（ aTopic ==http-on-examine-response）{}}，QueryInterface：function（aIID）{如果（aIID.equals（Ci.nsIObserver）|| aIID.equals（Ci.nsISupports））{return this; }抛出Components.results.NS_NOINTERFACE; }} // ----------------------------------------------函数TracingListener（）{this.originalListener = null;} TracingListener.prototype = {onDataAvailable：function（request，context，inputStream，offset，count）{this.originalListener。 onDataAvailable（request，context，inputStream，offset，count）; }，onStartRequest：function（request，context）{this.originalListener.onStartRequest（request，context）; }，onStopRequest：function（request，context，statusCode）{this.originalListener.onStopRequest（request，context，statusCode）; }，QueryInterface：function（aIID）{if（aIID.equals（Ci.nsIStreamListener）|| aIID.equals（Ci.nsISupports））{return this; }抛出Components.results.NS_NOINTERFACE; }}观察：function（aSubject，aTopic，aData）{if（aTopic ==http-on-examine-response）{var newListener = new TracingListener（）; aSubject.QueryInterface（Ci.nsITraceableChannel）; newListener.originalListener = aSubject.setNewListener（newListener）; }} aSubject = aSubject.QueryInterface（Ci.nsIChannel）; var uri = aSubject.URI; //在任何其他解析器步骤之前请求的原始URI //和/或redirects.var ouri = aSubject.originalURI; ch = Services。 io.newChannel（https://google.com/，null，null）; console.log（ch.toString（））; //[xpconnect wrapped nsIChannel]ch.QueryInterface（Ci.nsITraceableChannel）; console.log（ch.toString（））; //[xpconnect wrapped（nsISupports，nsIChannel，nsITraceableChannel）]console.log（ch.ofCi.nsIUploadChannel）; // trueconsole.log（ch.toString（））; //[xpconnect wrapped（nsISupports，nsIChannel，nsITraceableChannel，nsIUploadChannel）]//变量ch被称为在这一点上实现了四个给定的接口 复制粘贴这个工作：
$ b $
b
// const {classes：Cc，interfaces：Ci，utils：Cu，results：Cr} = Components;
// Cu.import（'resource：//gre/modules/Services.jsm'）;
Services.obs.addObserver（httpRequestObserver，http-on-examine-response，false）;
// Services.obs.removeObserver（httpRequestObserver，http-on-examine-response）;
// -------------------------------------------- ------------
var httpRequestObserver = {
观察：函数（aSubject，aTopic，aData）{
// if（aTopic == http-on-examine-response）{} //不需要这个，我们为http-on-examine-response添加了观察者，所以我们确实知道这只会触发`http-on-examine-response`
var newListener = new TracingListener（）;
Subject.QueryInterface（Ci.nsITraceableChannel）;
newListener.originalListener = aSubject.setNewListener（newListener）;
}
/ * //这段代码的重点是什么？
，
QueryInterface：function（aIID）{
if（aIID.equals（Ci.nsIObserver）|| aIID.equals（Ci.nsISupports））{
return this;
}
throw Cr.NS_NOINTERFACE;
}
* /
}
// ------------------------ ------------------------------------
函数TracingListener（）{}
TracingListener.prototype = {
onDataAvailable：function（request，context，inputStream，offset，count）{
console.log（'data available'）;
this.originalListener.onDataAvailable（request，context，inputStream，offset，count）;
}，
onStartRequest：function（request，context）{
this.originalListener.onStartRequest（request，context）;
}，
onStopRequest：function（request，context，statusCode）{
this.originalListener.onStopRequest（request，context，statusCode）;
}，
QueryInterface：function（aIID）{
if（aIID.equals（Ci.nsIStreamListener）|| aIID.equals（Ci.nsISupports））{
return this;
}
throw Cr.NS_NOINTERFACE;
}
}
//到底是什么？这不是一个对象的一部分？为什么观察结肠？
/ *
观察：function（aSubject，aTopic，aData）{
if（aTopic ==http-on-examine-response）{
var newListener = new TracingListener （）;
Subject.QueryInterface（Ci.nsITraceableChannel）;
newListener.originalListener = aSubject.setNewListener（newListener）;
}
}
* /
//这是什么垃圾？是应该在观察员？
/ *
Subject = aSubject.QueryInterface（Ci.nsIChannel）;
var uri = aSubject.URI;
//在任何其他解析器步骤之前请求的原始URI
//和/或重定向。
var ouri = aSubject.originalURI;
ch = Services.io.newChannel（https://google.com/，null，null）;
console.log（ch.toString（））;
//[xpconnect wrapped nsIChannel]
ch.QueryInterface（Ci.nsITraceableChannel）;
console.log（ch.toString（））;
//[xpconnect wrapped（nsISupports，nsIChannel，nsITraceableChannel）]
console.log（ch instanceof Ci.nsIUploadChannel）;
// true
console.log（ch.toString（））;
//[xpconnect wrapped（nsISupports，nsIChannel，nsITraceableChannel，nsIUploadChannel）]
//变量ch已知可以实现这四个给定的接口。
* /
更新
有人问我如何得到响应源，所以我创建了一个要点： https://gist.github.com/Noitidart/d0b08629ee2804538ad9#file-_ff-addon-snippet-copyofrequestsource-js-L16
Ive been trying to get this code working for firefox, that I got from nsITraceableChannel, Intercept HTTP Traffic and from How to get an url from nsITraceableChannel?, Ive been googling for the answer, with no luck. What I would like to do is intercept certain links, and change them. Any help is welcomed
The error I get is function statement requires a name witch points to observe: function(aSubject, aTopic, aData) part of the code
const Cc = Components.classes;
const Ci = Components.interfaces;
var observerService = Cc["@mozilla.org/observer-service;1"]
.getService(Ci.nsIObserverService);
observerService.addObserver(httpRequestObserver,
"http-on-examine-response", false);
observerService.removeObserver(httpRequestObserver,
"http-on-examine-response");
//--------------------------------------------------------
var httpRequestObserver =
{
observe: function(aSubject, aTopic, aData)
{
if (aTopic == "http-on-examine-response")
{
}
},
QueryInterface : function (aIID)
{
if (aIID.equals(Ci.nsIObserver) ||
aIID.equals(Ci.nsISupports))
{
return this;
}
throw Components.results.NS_NOINTERFACE;
}
}
//------------------------------------------------------------
function TracingListener() {
this.originalListener = null;
}
TracingListener.prototype =
{
onDataAvailable: function(request, context, inputStream, offset, count) {
this.originalListener.onDataAvailable(request, context, inputStream, offset, count);
},
onStartRequest: function(request, context) {
this.originalListener.onStartRequest(request, context);
},
onStopRequest: function(request, context, statusCode) {
this.originalListener.onStopRequest(request, context, statusCode);
},
QueryInterface: function (aIID) {
if (aIID.equals(Ci.nsIStreamListener) ||
aIID.equals(Ci.nsISupports)) {
return this;
}
throw Components.results.NS_NOINTERFACE;
}
}
observe: function(aSubject, aTopic, aData)
{
if (aTopic == "http-on-examine-response") {
var newListener = new TracingListener();
aSubject.QueryInterface(Ci.nsITraceableChannel);
newListener.originalListener = aSubject.setNewListener(newListener);
}
}
aSubject = aSubject.QueryInterface(Ci.nsIChannel);
var uri = aSubject.URI;
// original URI that was requested before any other resolver steps
// and/or redirects.
var ouri = aSubject.originalURI;
ch = Services.io.newChannel("https://google.com/", null, null);
console.log(ch.toString());
// "[xpconnect wrapped nsIChannel]"
ch.QueryInterface(Ci.nsITraceableChannel);
console.log(ch.toString());
// "[xpconnect wrapped (nsISupports, nsIChannel, nsITraceableChannel)]"
console.log(ch instanceof Ci.nsIUploadChannel);
// true
console.log(ch.toString());
// "[xpconnect wrapped (nsISupports, nsIChannel, nsITraceableChannel, nsIUploadChannel)]"
// the variable "ch" is known to implement the four given interfaces at this point.
解决方案
Copy paste this it works:
// const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
// Cu.import('resource://gre/modules/Services.jsm');
Services.obs.addObserver(httpRequestObserver, "http-on-examine-response", false);
// Services.obs.removeObserver(httpRequestObserver, "http-on-examine-response");
//--------------------------------------------------------
var httpRequestObserver = {
observe: function(aSubject, aTopic, aData) {
// if (aTopic == "http-on-examine-response") {} // no need for this, we added observer for `http-on-examine-response` so we know for sure this only triggers for `http-on-examine-response`
var newListener = new TracingListener();
aSubject.QueryInterface(Ci.nsITraceableChannel);
newListener.originalListener = aSubject.setNewListener(newListener);
}
/* // what was the point of this block of code?
,
QueryInterface: function(aIID) {
if (aIID.equals(Ci.nsIObserver) || aIID.equals(Ci.nsISupports)) {
return this;
}
throw Cr.NS_NOINTERFACE;
}
*/
}
//------------------------------------------------------------
function TracingListener() {}
TracingListener.prototype = {
onDataAvailable: function(request, context, inputStream, offset, count) {
console.log('data available');
this.originalListener.onDataAvailable(request, context, inputStream, offset, count);
},
onStartRequest: function(request, context) {
this.originalListener.onStartRequest(request, context);
},
onStopRequest: function(request, context, statusCode) {
this.originalListener.onStopRequest(request, context, statusCode);
},
QueryInterface: function(aIID) {
if (aIID.equals(Ci.nsIStreamListener) || aIID.equals(Ci.nsISupports)) {
return this;
}
throw Cr.NS_NOINTERFACE;
}
}
// what the hell? this is not part of an object? why observe colon?
/*
observe: function(aSubject, aTopic, aData) {
if (aTopic == "http-on-examine-response") {
var newListener = new TracingListener();
aSubject.QueryInterface(Ci.nsITraceableChannel);
newListener.originalListener = aSubject.setNewListener(newListener);
}
}
*/
// whats with all this junk? is it supposed to be in an observer??
/*
aSubject = aSubject.QueryInterface(Ci.nsIChannel);
var uri = aSubject.URI;
// original URI that was requested before any other resolver steps
// and/or redirects.
var ouri = aSubject.originalURI;
ch = Services.io.newChannel("https://google.com/", null, null);
console.log(ch.toString());
// "[xpconnect wrapped nsIChannel]"
ch.QueryInterface(Ci.nsITraceableChannel);
console.log(ch.toString());
// "[xpconnect wrapped (nsISupports, nsIChannel, nsITraceableChannel)]"
console.log(ch instanceof Ci.nsIUploadChannel);
// true
console.log(ch.toString());
// "[xpconnect wrapped (nsISupports, nsIChannel, nsITraceableChannel, nsIUploadChannel)]"
// the variable "ch" is known to implement the four given interfaces at this point.
*/
Update
Someone asked me how to get the response source with this, so I created a gist out of it: https://gist.github.com/Noitidart/d0b08629ee2804538ad9#file-_ff-addon-snippet-copyofrequestsource-js-L16
这篇关于nsITraceableChannel，拦截HTTP通信代码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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