/**
* Copyright 2009 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package com.google.step2.example.consumer.appengine;
import com.google.appengine.api.urlfetch.HTTPHeader;
import com.google.appengine.api.urlfetch.HTTPMethod;
import com.google.appengine.api.urlfetch.HTTPRequest;
import com.google.appengine.api.urlfetch.HTTPResponse;
import com.google.appengine.api.urlfetch.URLFetchService;
import com.google.appengine.api.urlfetch.URLFetchServiceFactory;
import com.google.inject.Singleton;
import com.google.step2.http.FetchException;
import com.google.step2.http.FetchRequest;
import com.google.step2.http.FetchResponse;
import com.google.step2.http.HttpFetcher;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.util.List;
@Singleton
public class AppEngineHttpFetcher implements HttpFetcher {
private final URLFetchService fetchService;
public AppEngineHttpFetcher() {
fetchService = URLFetchServiceFactory.getURLFetchService();
}
public FetchResponse fetch(FetchRequest request) throws FetchException {
HTTPMethod method;
switch (request.getMethod()) {
case POST:
method = HTTPMethod.POST;
break;
case HEAD:
method = HTTPMethod.HEAD;
break;
default:
method = HTTPMethod.GET;
break;
}
try {
HTTPRequest httpRequest = new HTTPRequest(request.getUri().toURL(), method);
HTTPResponse httpResponse = fetchService.fetch(httpRequest);
return new AppEngineFetchResponse(httpResponse);
} catch (MalformedURLException e) {
throw new FetchException(e);
} catch (IOException e) {
throw new FetchException(e);
}
}
private static class AppEngineFetchResponse implements FetchResponse {
private final HTTPResponse httpResponse;
public AppEngineFetchResponse(HTTPResponse httpResponse) {
this.httpResponse = httpResponse;
}
public byte[] getContentAsBytes() {
return httpResponse.getContent();
}
public InputStream getContentAsStream() {
return new ByteArrayInputStream(getContentAsBytes());
}
public String getFirstHeader(String name) {
List<HTTPHeader> headers = httpResponse.getHeaders();
for (HTTPHeader header : headers) {
if (header.getName().equalsIgnoreCase(name)) {
return header.getValue();
}
}
return null;
}
public int getStatusCode() {
return httpResponse.getResponseCode();
}
}
}