gecko/netwerk/test/TestDiskCache.js

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var DEBUG = false;
var clientID = "javascript";
var key = "theme:button";
var nsICache = Components.interfaces.nsICache;
function getCacheService()
{
var nsCacheService = Components.classes["@mozilla.org/network/cache-service;1"];
var service = nsCacheService.getService(Components.interfaces.nsICacheService);
return service;
}
function createCacheSession(clientID, storagePolicy, streamable)
{
var service = getCacheService();
var session = service.createSession(clientID, storagePolicy, streamable);
return session;
}
function openCacheEntry(mode)
{
var session = createCacheSession(clientID, nsICache.STORE_ON_DISK, true);
var entry = session.openCacheEntry(key, mode);
return entry;
}
function wrapInputStream(input)
{
var nsIScriptableInputStream = Components.interfaces.nsIScriptableInputStream;
var factory = Components.classes["@mozilla.org/scriptableinputstream;1"];
var wrapper = factory.createInstance(nsIScriptableInputStream);
wrapper.init(input);
return wrapper;
}
function test()
{
var outputEntry = openCacheEntry(nsICache.ACCESS_WRITE);
var output = outputEntry.transport.openOutputStream(0, -1, 0);
if (output.write("foo", 3) == 3)
print("disk cache write works!");
else
print("disk cache write broken!");
// store some metadata.
outputEntry.setMetaDataElement("size", "3");
output.close();
outputEntry.markValid();
outputEntry.close();
var inputEntry = openCacheEntry(nsICache.ACCESS_READ);
var input = wrapInputStream(inputEntry.transport.openInputStream(0, -1, 0));
if (input.read(input.available()) == "foo")
print("disk cache read works!");
else
print("disk cache read broken!");
if (inputEntry.getMetaDataElement("size") == "3")
print("disk cache metadata works!");
else
print("disk cache metadata broken!");
input.close();
inputEntry.close();
}
function doom()
{
var doomedEntry = openCacheEntry(nsICache.ACCESS_READ_WRITE);
doomedEntry.doom();
doomedEntry.close();
}
if (DEBUG) {
getCacheService();
print("cache service loaded.");
} else {
print("running disk cache test.");
test();
print("disk cache test complete.");
}