public static InputStream openCachedStream(URI uri) {
TiResponseCache rc = (TiResponseCache) TiResponseCache.getDefault();
if (rc == null) {
return null;
}
if (rc.cacheDir == null) {
return null;
}
String hash = DigestUtils.shaHex(uri.toString());
File hFile = new File(rc.cacheDir, hash + HEADER_SUFFIX);
File bFile = new File(rc.cacheDir, hash + BODY_SUFFIX);
if (!bFile.exists() || !hFile.exists()) {
return null;
}
try {
return new FileInputStream(bFile);
} catch (FileNotFoundException e) {
// Fallback to URL download?
return null;
}
}
public static void remove(URI uri) {
TiResponseCache rc = (TiResponseCache) TiResponseCache.getDefault();
if (rc == null) return;
if (rc.cacheDir == null) return;
String hash = DigestUtils.shaHex(uri.toString());
File hFile = new File(rc.cacheDir, hash + HEADER_SUFFIX);
File bFile = new File(rc.cacheDir, hash + BODY_SUFFIX);
if (bFile.exists()) bFile.delete();
if (hFile.exists()) hFile.delete();
}
public static boolean peek(URI uri) {
TiResponseCache rc = (TiResponseCache) TiResponseCache.getDefault();
if (rc == null) return false;
if (rc.cacheDir == null) return false;
String hash = DigestUtils.shaHex(uri.toString());
File hFile = new File(rc.cacheDir, hash + HEADER_SUFFIX);
File bFile = new File(rc.cacheDir, hash + BODY_SUFFIX);
if (!bFile.exists() || !hFile.exists()) return false;
return true;
}