/*
* This function is used by the handleHTTPLoad to setup the cache headers
* correctly.
* Returns true if the response was handled from the cache
*/
private boolean handleCache() {
switch (mCacheMode) {
// This mode is normally used for a reload, it instructs the http
// loader to not use the cached content.
case WebSettings.LOAD_NO_CACHE:
break;
// This mode is used when the content should only be loaded from
// the cache. If it is not there, then fail the load. This is used
// to load POST content in a history navigation.
case WebSettings.LOAD_CACHE_ONLY:
{
CacheResult result = CacheManager.getCacheFile(mListener.url(), null);
if (result != null) {
startCacheLoad(result);
} else {
// This happens if WebCore was first told that the POST
// response was in the cache, then when we try to use it
// it has gone.
// Generate a file not found error
int err = EventHandler.FILE_NOT_FOUND_ERROR;
mListener.error(
err,
mListener
.getContext()
.getText(EventHandler.errorStringResources[Math.abs(err)])
.toString());
}
return true;
}
// This mode is for when the user is doing a history navigation
// in the browser and should returned cached content regardless
// of it's state. If it is not in the cache, then go to the
// network.
case WebSettings.LOAD_CACHE_ELSE_NETWORK:
{
if (WebView.LOGV_ENABLED) {
Log.v(LOGTAG, "FrameLoader: checking cache: " + mListener.url());
}
// Get the cache file name for the current URL, passing null for
// the validation headers causes no validation to occur
CacheResult result = CacheManager.getCacheFile(mListener.url(), null);
if (result != null) {
startCacheLoad(result);
return true;
}
break;
}
// This is the default case, which is to check to see if the
// content in the cache can be used. If it can be used, then
// use it. If it needs revalidation then the relevant headers
// are added to the request.
default:
case WebSettings.LOAD_NORMAL:
return mListener.checkCache(mHeaders);
} // end of switch
return false;
}
