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/*******************************************************************************
* Copyright (c) 2010 Tasktop Technologies and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Tasktop Technologies - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.commons.repositories.http.core;
import java.io.IOException;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpHead;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.eclipse.mylyn.commons.core.operations.IOperationMonitor;
import org.eclipse.mylyn.commons.core.operations.OperationUtil;
import org.eclipse.mylyn.commons.repositories.core.auth.AuthenticationCredentials;
import org.eclipse.mylyn.commons.repositories.core.auth.AuthenticationException;
import org.eclipse.mylyn.commons.repositories.core.auth.AuthenticationRequest;
import org.eclipse.mylyn.commons.repositories.core.auth.AuthenticationType;
/**
* @author Steffen Pingel
*/
public abstract class CommonHttpOperation<T> {
private final CommonHttpClient client;
public CommonHttpOperation(CommonHttpClient client) {
this.client = client;
}
public CommonHttpOperation(CommonHttpClient client, HttpRequestBase request) {
this.client = client;
}
protected void authenticate(IOperationMonitor monitor) throws IOException {
client.authenticate(monitor);
}
protected HttpGet createGetRequest(String requestPath) {
return new HttpGet(requestPath);
}
protected HttpHead createHeadRequest(String requestPath) {
return new HttpHead(requestPath);
}
protected HttpPost createPostRequest(String requestPath) {
return new HttpPost(requestPath);
}
public CommonHttpResponse execute(HttpRequestBase request, IOperationMonitor monitor) throws IOException {
monitor = OperationUtil.convert(monitor);
try {
// first attempt
return executeOnce(request, monitor);
} catch (AuthenticationException e) {
try {
requestCredentials((AuthenticationRequest) e.getRequest(), monitor);
} catch (UnsupportedOperationException e2) {
throw e;
}
}
// second attempt
return executeOnce(request, monitor);
}
protected CommonHttpResponse executeOnce(HttpRequestBase request, IOperationMonitor monitor) throws IOException {
// force authentication
if (needsAuthentication()) {
authenticate(monitor);
}
// first attempt
HttpResponse response = client.execute(request, monitor);
try {
validate(response, monitor);
// success
return new CommonHttpResponse(request, response);
} catch (IOException e) {
HttpUtil.release(request, response, monitor);
throw e;
} catch (RuntimeException e) {
HttpUtil.release(request, response, monitor);
throw e;
}
}
protected final CommonHttpClient getClient() {
return client;
}
protected boolean needsAuthentication() {
return client.needsAuthentication();
}
protected <T extends AuthenticationCredentials> T requestCredentials(
AuthenticationRequest<AuthenticationType<T>> request, IOperationMonitor monitor) {
return client.requestCredentials(request, monitor);
}
protected void validate(HttpResponse response, IOperationMonitor monitor) throws AuthenticationException {
client.validate(response, monitor);
}
}
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