获取响应标头/正文

发布于 2024-12-09 01:46:40 字数 1277 浏览 0 评论 0原文

我正在开发一个 firefox 插件，我正在监听这样的 http 响应：

var observerService = Components.classes["@mozilla.org/observer-service;1"].getService(Components.interfaces.nsIObserverService);
observerService.addObserver(httpObserver, "http-on-examine-response", false);

它调用我的 httpObserver 对象，如下所示：

var httpObserver =
{
 observe : function(aSubject, aTopic, aData) 
 {  
            aSubject.QueryInterface(Components.interfaces.nsIHttpChannel);
            httpstatus = aSubject.responseStatus;
            if(httpstatus == 200 && aSubject.contentType.toString().indexOf("text/") != -1)
            {
                alert("URL: " + aSubject.name + "\r\nStatus: " + httpstatus + "\r\nContentType: " + aSubject.contentType); //Works great
                alert("Body: " + aSubject.responseText); //Is undefined, why?
            }
            else if(httpstatus == 404 && aSubject.contentType.toString().indexOf("text/html") != -1)
                alert("Page not found!\r\nURL: " + aSubject.name + "\r\nContentType: " + aSubject.contentType);
 }
};

我遇到了以下问题：

我想获取整个响应中的正文和标题，但我不知道如何。我曾经读到，服务器不在同一个域中可能是一个问题，但是firefox如何处理它呢？

我已经做了很多研究，但没有发现任何有用的东西，也许我错过了一些东西..

顺便说一句：如果有帮助的话，我也可以访问请求对象。

原文

I'm developing a firefox addon and I'm listening to http responses like this:

var observerService = Components.classes["@mozilla.org/observer-service;1"].getService(Components.interfaces.nsIObserverService);
observerService.addObserver(httpObserver, "http-on-examine-response", false);

Which calls my httpObserver object that looks like this:

var httpObserver =
{
 observe : function(aSubject, aTopic, aData) 
 {  
            aSubject.QueryInterface(Components.interfaces.nsIHttpChannel);
            httpstatus = aSubject.responseStatus;
            if(httpstatus == 200 && aSubject.contentType.toString().indexOf("text/") != -1)
            {
                alert("URL: " + aSubject.name + "\r\nStatus: " + httpstatus + "\r\nContentType: " + aSubject.contentType); //Works great
                alert("Body: " + aSubject.responseText); //Is undefined, why?
            }
            else if(httpstatus == 404 && aSubject.contentType.toString().indexOf("text/html") != -1)
                alert("Page not found!\r\nURL: " + aSubject.name + "\r\nContentType: " + aSubject.contentType);
 }
};

I've got the following problem(s):

I'd like to get the whole body and header from the response but I don't know how.
I once read that it could be a problem that the server is not in the same domain, but how does the firefox handles it then?

I already did a lot of research but I didn't find anything usefull, maybe I missed something..

Btw.: I've got access to the request object as well if that helps.

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却一份温柔 2024-12-16 01:46:40

您可以使用 nsITraceableChannel 接口，它是由所有 HTTP 请求。这允许您用自己的通道侦听器替换通道侦听器，以便您可以在将 onDataAvailable 调用中读取数据，然后再将其传递到原始侦听器。这里有一些示例代码就是这样做的： http://www. softwareihard.com/blog/firebug/nsitraceablechannel-intercept-http-traffic/