Question

我用

Components.classes["@mozilla.org/network/cache-service;1"].getService(Components.interfaces.nsICacheService);

在开发Firefox扩展时操作http缓存。

但是在我升级到Firefox 38 esr之后，这个界面在调用它的函数时会抛出错误

[Exception... "Component returned failure code: 0x80004001 (NS_ERROR_NOT_IMPLEMENTED) [nsICacheService.visitEntries]" nsresult: "0x80004001 (NS_ERROR_NOT_IMPLEMENTED)"

我在MDN中没有发现它已经过时了，所以谁知道为什么？非常感谢。

Answer 1

http://code.metager.de/source/xref/mozilla/firefox/netwerk/cache/nsICacheService.idl

这看起来像一个暗示 *当优先使用缓存v2时，@throws NS_ERROR_NOT_IMPLEMENTED。

https://bugzilla.mozilla.org/show_bug.cgi?id=913807

我认为我们需要做的就是在

中的这一行改变1到2

var cacheService = cc [“@ mozilla.org/network/cache-service;1”] .getService（ci.nsICacheService）;

Answer 2

我尝试了这段代码并抛出:(在浏览器环境中使用scratchcpad复制粘贴 - https://www.youtube.com/watch?v=oo4STWceGTM）

var cacheService = Cc["@mozilla.org/network/cache-service;1"].getService(Ci.nsICacheService);
console.log('cacheService:', cacheService);

function CacheVisitor(){}

CacheVisitor.prototype = {
    QueryInterface : function(iid)
    {
        if (iid.equals(Ci.nsICacheVisitor))
            return this;
        throw Components.results.NS_NOINTERFACE;
    },

    visitDevice : function(deviceID, deviceInfo)
    {
        console.log("[visiting device (deviceID = ", deviceID ,", description = ", deviceInfo.description ,")]");
        return true;
    },

    visitEntry : function(deviceID, entryInfo)
    {
        console.log("[visiting entry (clientID = ", entryInfo.clientID, "key = ", entryInfo.key, ")]");
        return true;
    }
};
var visitor = new CacheVisitor();
cacheService.visitEntries(visitor); // throws on this line here!!!

它抛出行cacheService.visitEntries(visitor); // throws on this line here!!!它会抛出这个：

/*
Exception: [Exception... "Component returned failure code: 0x80004001 (NS_ERROR_NOT_IMPLEMENTED) [nsICacheService.visitEntries]"  nsresult: "0x80004001 (NS_ERROR_NOT_IMPLEMENTED)"  location: "JS frame :: Scratchpad/1 :: <TOP_LEVEL> :: line 27"  data: no]
*/

这是你看起来像的问题。你可以验证一下，我看不到你的可重复代码。

nsICacheService在Firefox 38中不起作用

2 个答案: