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我在 Mozilla 的 Addon Builder 中定义了一个http-on-modify-request观察者,并希望重定向请求(更改subject.URI.spec),但 Firefox 抱怨:

Error: An exception occurred.
Traceback (most recent call last):
  File "http://chrome.angrybirds.com/", line 2536, in null
  File "http://chrome.angrybirds.com/", line 2344, in null
  File "http://chrome.angrybirds.com/", line 2988, in wi
  File "http://chrome.angrybirds.com/", line 1756, in ti
  File "http://chrome.angrybirds.com/", line 1231, in Ji
  File "http://chrome.angrybirds.com/", line 3366, in Ri
  File "http://chrome.angrybirds.com/", line 2381, in Di
  File "http://chrome.angrybirds.com/", line 2956, in Ni
  File "http://chrome.angrybirds.com/", line 3366, in DHb
  File "http://chrome.angrybirds.com/", line 3340, in oHb
  File "http://chrome.angrybirds.com/", line 1869, in Eic
  File "http://chrome.angrybirds.com/", line 3285, in BS
  File "http://chrome.angrybirds.com/", line 3362, in _Jb
  File "http://chrome.angrybirds.com/", line 3054, in _Bb
  File "http://chrome.angrybirds.com/", line 2020, in dJb
  File "http://chrome.angrybirds.com/", line 2889, in fJb
  File "resource://jid0-[snipped id]-api-utils-lib/observer-service.js", line 176, in null
    this.callback(subject, data);
  File "resource://jid0-[snipped id]-moddedbirds-url-rewriter-lib/main.js", line 11, in null
    if(endsWith(s.URI.spec,search)) s.URI.spec=replace;
[Exception... "Component returned failure code: 0x80004004 (NS_ERROR_ABORT)
  [nsIURI.spec]"  nsresult: "0x80004004 (NS_ERROR_ABORT)" location: "JS frame
  :: resource://jid0-[snipped id]-api-utils-lib/securable-module.js
  -> resource://jid0-[snipped id]-moddedbirds-url-rewriter-lib/main.js ::
  <TOP_LEVEL> :: line 11"  data: no]

为什么它不起作用?

也许我不能使用http-on-modify-request观察者来重写 URI?

我怎么做?

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1 回答 1

3

是的,nsIChannel 文档说“与通道对应的 URI。它的值是不可变的。只读的。” 并且不可变检查似乎确实返回了 NS_ERROR_ABORT (source)。

对你来说不幸的是,这个人(在 Firefox 扩展中重定向请求(nsiHttpChannel?))没有发布他找到的解决方案,这个问题也在mozillazine 上被问到这里这里。

我最好的想法是为此做太多工作:尝试nsITraceableChannel。Wladimir有一个想法,“对nsIChannel.notificationCallbacks进行所有必要的调用,然后取消请求”。错误 286159对此进行了一些讨论(在 2005 年似乎没有办法干净地做到这一点)。

由于这是一个反复出现的问题,如果您从Necko 同行那里得到确认,然后将其记录在 MDC 上,那就太好了。

于 2011-12-11T23:11:50.260 回答