Firefox插件观察员http-on-modify-request不能正常工作 [英] Firefox Addon observer http-on-modify-request not working properly

问题描述

在我的插件中有一个奇怪的错误，
插件本身需要为特定的域添加一个请求头参数，
这一切都正常，但是错误是，那观察者http-on-modify-request在启动时不会被调用，只有当我重新加载页面的时候，它才能正常工作。

我的意思是：

1. 我转到mysite.com/ - 未修改标题，
   
2. 重新加载 - 标题模式


3. mysite.com/中的新选项卡 - 未修改标头
/ li>

4. 重新加载选项卡 - 标题模式化

我使用addon sdk： / b>

  exports.main = function（options，callbacks）{
 
 //创建观察者
 httpRequestObserver = 
 {
观察：函数（主题，主题，数据）
 {
 
 if（topic ==http-on-modify-request）{ 
 
 
 //只能识别特定的偏好域
 var windowsService = Cc ['@ mozilla.org/appshell/window-mediator;1'].getService(Ci.nsIWindowMediator）; 
 var uri = windowsService.getMostRecentWindow（'navigator：browser'）。getBrowser（）。currentURI; 
 var domainloc = uri.host; 
 
 if（domainloc ==mysite.com）{
 var httpChannel = subject.QueryInterface（Ci.nsIHttpChannel）; 
 httpChannel.setRequestHeader（x-test，test，false）; 
 
 
 
 
 
 $ b register：function（）
 {
 var observerService = Cc [@ mozilla.org / observer-service; 1] 
 .getService（Ci.nsIObserverService）; 
 observerService.addObserver（this，http-on-modify-request，false）; 
 
 
 unregister：function（）
 {
 var observerService = Cc [@ mozilla.org/observer-service;1] 
 .getService（Ci.nsIObserverService）; 
 observerService.removeObserver（这个http-on-modify-request）; 
 
 
} 
}; 
 
 
 //注册观察者
 httpRequestObserver.register（）; 
 
}; 
 
 exports.onUnload = function（reason）{
 
 httpRequestObserver.unregister（）; 
}; 
  

请帮助我，我搜索了几个小时没有结果。
代码正在工作，但不是在第一次页面加载，
只有当我重新加载。

目标是只有mysite。 com，那么一直会有 x-text = test 标题请求，但是只能在mysite.com上。

是当前在选项卡中加载的Uri。在http-on-modify-request通知时间，请求不会发送到服务器，所以如果它是一个新的选项卡，浏览器没有任何 currentUri 。当你刷新选项卡时，它使用当前页面的URI，它看起来像。

试试这个： p>

  if（topic ==http-on-modify-request）{
 var httpChannel = subject.QueryInterface（Ci .nsIHttpChannel）; 
 var uri = httpChannel.URI; 
 var domainloc = uri.host; 
 
 //只识别特定的首选项域
 if（domainloc ==mysite.com）{
 httpChannel.setRequestHeader（x-test，test，假）; 
} 
} 
  

I have a weird bug in my addon, the addon itself needs to add a request header parameters for a specific domain, it's all working, but the bug is, that the observer http-on-modify-request is not called at start, only if I reload the page, then it's working.

I mean:

1. I go to mysite.com/ - no header modified,
2. I reload page - header modefied
3. reload again - header modefied
4. new tab at mysite.com/ - no header modified
5. reload tab - header modefied

My code, I'm using the addon sdk:

exports.main = function(options,callbacks) {

// Create observer 
httpRequestObserver =  
{  
  observe: function(subject, topic, data)  
  {  

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


    //only identify to specific preference domain
    var windowsService = Cc['@mozilla.org/appshell/window-mediator;1'].getService(Ci.nsIWindowMediator);
    var uri = windowsService.getMostRecentWindow('navigator:browser').getBrowser().currentURI;
    var domainloc = uri.host;

        if (domainloc=="mysite.com"){
            var httpChannel = subject.QueryInterface(Ci.nsIHttpChannel);  
            httpChannel.setRequestHeader("x-test", "test", false);  
        }
    }  


  }, 

  register: function()  
  { 
    var observerService = Cc["@mozilla.org/observer-service;1"]  
            .getService(Ci.nsIObserverService);  
    observerService.addObserver(this, "http-on-modify-request", false);         
  },  

  unregister: function()  
  {
    var observerService = Cc["@mozilla.org/observer-service;1"]  
            .getService(Ci.nsIObserverService);  
    observerService.removeObserver(this, "http-on-modify-request"); 


  }  
};


//register observer
httpRequestObserver.register();

};

exports.onUnload = function(reason) {

httpRequestObserver.unregister();
};

Please help me, I searched for hours with no results. The code is working, but not at first time of page loading, only if I reload.

The goal is that only on mysite.com, there will be a x-text=test header request, all the time, but only on mysite.com.

解决方案

currentUri on browser is the Uri that is currently loaded in the tab. At "http-on-modify-request" notification time, the request is not sent to the server yet, so if it's a new tab, the browser doesn't have any currentUri. When you refresh the tab in place, it uses the uri of the current page, and it seemingly works.

Try this instead:

if (topic == "http-on-modify-request") {
    var httpChannel = subject.QueryInterface(Ci.nsIHttpChannel);  
    var uri = httpChannel.URI;
    var domainloc = uri.host;

    //only identify to specific preference domain
    if (domainloc == "mysite.com") {
        httpChannel.setRequestHeader("x-test", "test", false);
    }
}

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