@SuppressWarnings("unchecked")
public ClientResponse execute(ClientRequest request) throws Exception {
String uri = request.getUri();
final HttpRequestBase httpMethod = createHttpMethod(uri, request.getHttpMethod());
try {
loadHttpMethod(request, httpMethod);
final HttpResponse res = httpClient.execute(httpMethod, httpContext);
final BaseClientResponse response = new BaseClientResponse(null, this);
BaseClientResponseStreamFactory sf =
new BaseClientResponseStreamFactory() {
InputStream stream;
public InputStream getInputStream() throws IOException {
if (stream == null) {
HttpEntity entity = res.getEntity();
if (entity == null) return null;
stream = new SelfExpandingBufferredInputStream(entity.getContent());
}
return stream;
}
public void performReleaseConnection() {
// Apache Client 4 is stupid, You have to get the InputStream and close it if there is
// an entity
// otherwise the connection is never released. There is, of course, no close() method
// on response
// to make this easier.
try {
if (stream != null) {
stream.close();
} else {
InputStream is = getInputStream();
if (is != null) {
is.close();
}
}
} catch (Exception ignore) {
}
}
};
response.setStreamFactory(sf);
response.setAttributes(request.getAttributes());
response.setStatus(res.getStatusLine().getStatusCode());
response.setHeaders(extractHeaders(res));
response.setProviderFactory(request.getProviderFactory());
return response;
} finally {
cleanUpAfterExecute(httpMethod);
}
}
public ClientResponse cacheIfPossible(ClientRequest request, BaseClientResponse response)
throws Exception {
String cc = (String) response.getResponseHeaders().getFirst(HttpHeaders.CACHE_CONTROL);
String exp = (String) response.getResponseHeaders().getFirst(HttpHeaders.EXPIRES);
int expires = -1;
if (cc != null) {
CacheControl cacheControl = CacheControl.valueOf(cc);
if (cacheControl.isNoCache()) return response;
expires = cacheControl.getMaxAge();
} else if (exp != null) {
Date date = DateUtil.parseDate(exp);
expires = (int) ((date.getTime() - System.currentTimeMillis()) / 1000);
}
String lastModified =
(String) response.getResponseHeaders().getFirst(HttpHeaders.LAST_MODIFIED);
String etag = (String) response.getResponseHeaders().getFirst(HttpHeaders.ETAG);
String contentType = (String) response.getResponseHeaders().getFirst(HttpHeaders.CONTENT_TYPE);
byte[] cached =
ReadFromStream.readFromStream(1024, response.getStreamFactory().getInputStream());
response.getStreamFactory().performReleaseConnection();
MediaType mediaType = MediaType.valueOf(contentType);
final BrowserCache.Entry entry =
cache.put(
request.getUri(),
mediaType,
response.getResponseHeaders(),
cached,
expires,
etag,
lastModified);
response.setStreamFactory(new CachedStreamFactory(entry));
return response;
}