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我想要獲取Firefox擴展中的頁面大小。 之前,我用這個代碼:獲取Firefox的擴展頁面大小
var pageSize = null,
cacheService = Components.classes["@mozilla.org/network/cache-service;1"].getService(Components.interfaces.nsICacheService),
httpCacheSession = cacheService.createSession("HTTP", 0, true),
cacheEntryDescriptor;
httpCacheSession.doomEntriesIfExpired = false;
cacheEntryDescriptor = httpCacheSession.openCacheEntry(content.document.location.toString().replace(/#.*$/, ""), Components.interfaces.nsICache.ACCESS_READ, false);
if (cacheEntryDescriptor) {
pageSize = Math.round(cacheEntryDescriptor.dataSize/1024 * 100)/100;
}
但更新瀏覽器後,我得到的錯誤:
NS_ERROR_NOT_AVAILABLE: Component returned failure code: 0x80040111 (NS_ERROR_NOT_AVAILABLE) [nsICacheSession.openCacheEntry]
在行:
cacheEntryDescriptor = httpCacheSession.openCacheEntry(content.document.location.toString().replace(/#.*$/, ""), Components.interfaces.nsICache.ACCESS_READ, false);
如何解決這個問題呢?