nsICacheService 在 Firefox 38 中不起作用

nsICacheService doesn't work in Firefox 38

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。

但是我升级到Firefox 38 esr后,这个接口在调用它的函数时会报错

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

而且我没有发现它在 MDN 中已过时,所以有人知道为什么吗?非常感谢。

我试过这段代码,它抛出:(在浏览器环境的 scratcpad 中复制粘贴 运行 - 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!!!

它在行 cacheService.visitEntries(visitor); // throws on this line here!!! 上抛出它抛出这个:

/*
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]
*/

这与您遇到的问题相同。你能验证一下吗,我没有看到你的可重现代码。

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

这看起来像是一个提示 * @throws NS_ERROR_NOT_IMPLEMENTED 当首选使用缓存 v2 时。

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

我认为我们需要做的就是将

这一行中的 1 更改为 2

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