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/**
* (C) Copyright 2008 Nicholas A. Zigarovich
*
* Use, modification, and distribution are subject to the terms specified in the
* COPYING file.
**/
in_module(null);
const cache_service = Cc["@mozilla.org/network/cache-service;1"]
.getService(Ci.nsICacheService);
const CACHE_MEMORY = Ci.nsICache.STORE_IN_MEMORY;
const CACHE_DISK = Ci.nsICache.STORE_ON_DISK;
const CACHE_OFFLINE = Ci.nsICache.STORE_OFFLINE;
const CACHE_ALL = Ci.nsICache.STORE_ANYWHERE;
const CACHE_SESSION_HTTP = "HTTP";
const CACHE_SESSION_HTTP_OFFLINE = "HTTP-offline";
const CACHE_SESSION_FTP = "FTP";
// Returns null if uri is not cached.
function cache_entry_open (cache_type, cache_session, uri) {
if (uri instanceof Ci.nsIURI)
uri = uri.spec;
let session = cache_service.createSession(cache_session, 0, true);
session.doomEntriesIfExpired = false;
// Remove the ref component of the URL
let cache_key = uri.replace(/#.*$/, "");
try {
return session.openCacheEntry(cache_key,
Ci.nsICache.ACCESS_READ,
false);
}
catch (ex) {
if (ex.name == "NS_ERROR_CACHE_KEY_NOT_FOUND" ||
ex.name == "NS_ERROR_CACHE_WAIT_FOR_VALIDATION")
return null;
throw ex;
}
}
// Returns false if uri is not cached, else true.
function cache_entry_clear (cache_type, cache_session, uri) {
let entry = cache_entry_open(cache_type, cache_session, uri);
if (entry == null)
return false;
entry.doom();
entry.close();
return true;
}
function cache_clear (cache_type) {
cache_service.evictEntries(cache_type);
if (cache_type == CACHE_DISK)
cache_service.evictEntries(Ci.nsICache.STORE_ON_DISK_IN_FILE);
}
function cache_disable (cache_type) {
if (cache_type == CACHE_MEMORY)
session_pref("browser.cache.memory.enable", false);
else if (cache_type == CACHE_DISK)
session_pref("browser.cache.disk.enable", false);
else if (cache_type == CACHE_OFFLINE)
session_pref("browser.cache.offline.enable", false);
else if (cache_type == CACHE_ALL) {
cache_disable(CACHE_MEMORY);
cache_disable(CACHE_DISK);
cache_disable(CACHE_OFFLINE);
}
else
throw new Error("Invalid cache type");
}
function cache_enable (cache_type) {
if (cache_type == CACHE_MEMORY)
session_pref("browser.cache.memory.enable", true);
else if (cache_type == CACHE_DISK)
session_pref("browser.cache.disk.enable", true);
else if (cache_type == CACHE_OFFLINE)
session_pref("browser.cache.offline.enable", true);
else if (cache_type == CACHE_ALL) {
cache_enable(CACHE_MEMORY);
cache_enable(CACHE_DISK);
cache_enable(CACHE_OFFLINE);
}
else
throw new Error("Invalid cache type");
}
provide("cache");
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