/**
* Check the cache for the current URL, and load it if it is valid.
*
* @param headers for the request
* @return true if cached response is used.
*/
boolean checkCache(Map<String, String> headers) {
// Get the cache file name for the current URL
CacheResult result = CacheManager.getCacheFile(url(), headers);
if (result != null) {
CacheLoader cacheLoader = new CacheLoader(this, result);
// If I got a cachedUrl and the revalidation header was not
// added, then the cached content valid, we should use it.
if (!headers.containsKey(CacheManager.HEADER_KEY_IFNONEMATCH)
&& !headers.containsKey(CacheManager.HEADER_KEY_IFMODIFIEDSINCE)) {
if (Config.LOGV) {
Log.v(LOGTAG, "FrameLoader: HTTP URL in cache " + "and usable: " + url());
}
// Load the cached file
cacheLoader.load();
return true;
} else {
// The contents of the cache need to be revalidated
// so just provide the listener with the cache loader
// in the case that the server response positively to
// the cached content.
setCacheLoader(cacheLoader);
}
}
return false;
}
/*
* This function is used by handleUrlInterecpt and handleCache to
* setup a load from the byte stream in a CacheResult.
*/
private void startCacheLoad(CacheResult result) {
if (WebView.LOGV_ENABLED) {
Log.v(LOGTAG, "FrameLoader: loading from cache: " + mListener.url());
}
// Tell the Listener respond with the cache file
CacheLoader cacheLoader = new CacheLoader(mListener, result);
mListener.setCacheLoader(cacheLoader);
cacheLoader.load();
}