org.springframework.ws.transport.http.HttpComponentsConnection.java Source code

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Here is the source code for org.springframework.ws.transport.http.HttpComponentsConnection.java

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/*
 * Copyright 2005-2012 the original author or authors.
 *
 * 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 org.springframework.ws.transport.http;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Arrays;
import java.util.Iterator;

import org.springframework.util.Assert;
import org.springframework.ws.WebServiceMessage;
import org.springframework.ws.transport.WebServiceConnection;

import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;

/**
 * Implementation of {@link WebServiceConnection} that is based on Apache HttpClient. Exposes a {@link HttpPost} and
 * {@link HttpResponse}.
 *
 * @author Alan Stewart
 * @author Barry Pitman
 * @author Arjen Poutsma
 * @since 2.1.0
 */
public class HttpComponentsConnection extends AbstractHttpSenderConnection {

    private final HttpClient httpClient;

    private final HttpPost httpPost;

    private final HttpContext httpContext;

    private HttpResponse httpResponse;

    private ByteArrayOutputStream requestBuffer;

    protected HttpComponentsConnection(HttpClient httpClient, HttpPost httpPost, HttpContext httpContext) {
        Assert.notNull(httpClient, "httpClient must not be null");
        Assert.notNull(httpPost, "httpPost must not be null");
        this.httpClient = httpClient;
        this.httpPost = httpPost;
        this.httpContext = httpContext;
    }

    public HttpPost getHttpPost() {
        return httpPost;
    }

    public HttpResponse getHttpResponse() {
        return httpResponse;
    }

    @Override
    public void onClose() throws IOException {
        if (httpResponse != null && httpResponse.getEntity() != null) {
            EntityUtils.consume(httpResponse.getEntity());
        }
    }

    /*
      * URI
      */
    public URI getUri() throws URISyntaxException {
        return new URI(httpPost.getURI().toString());
    }

    /*
      * Sending request
      */

    @Override
    protected void onSendBeforeWrite(WebServiceMessage message) throws IOException {
        requestBuffer = new ByteArrayOutputStream();
    }

    @Override
    protected void addRequestHeader(String name, String value) throws IOException {
        httpPost.addHeader(name, value);
    }

    @Override
    protected OutputStream getRequestOutputStream() throws IOException {
        return requestBuffer;
    }

    @Override
    protected void onSendAfterWrite(WebServiceMessage message) throws IOException {
        httpPost.setEntity(new ByteArrayEntity(requestBuffer.toByteArray()));
        requestBuffer = null;
        if (httpContext != null) {
            httpResponse = httpClient.execute(httpPost, httpContext);
        } else {
            httpResponse = httpClient.execute(httpPost);
        }
    }

    /*
     * Receiving response
     */

    @Override
    protected int getResponseCode() throws IOException {
        return httpResponse.getStatusLine().getStatusCode();
    }

    @Override
    protected String getResponseMessage() throws IOException {
        return httpResponse.getStatusLine().getReasonPhrase();
    }

    @Override
    protected long getResponseContentLength() throws IOException {
        HttpEntity entity = httpResponse.getEntity();
        if (entity != null) {
            return entity.getContentLength();
        }
        return 0;
    }

    @Override
    protected InputStream getRawResponseInputStream() throws IOException {
        HttpEntity entity = httpResponse.getEntity();
        if (entity != null) {
            return entity.getContent();
        }
        throw new IllegalStateException("Response has no enclosing response entity, cannot create input stream");
    }

    @Override
    protected Iterator<String> getResponseHeaderNames() throws IOException {
        Header[] headers = httpResponse.getAllHeaders();
        String[] names = new String[headers.length];
        for (int i = 0; i < headers.length; i++) {
            names[i] = headers[i].getName();
        }
        return Arrays.asList(names).iterator();
    }

    @Override
    protected Iterator<String> getResponseHeaders(String name) throws IOException {
        Header[] headers = httpResponse.getHeaders(name);
        String[] values = new String[headers.length];
        for (int i = 0; i < headers.length; i++) {
            values[i] = headers[i].getValue();
        }
        return Arrays.asList(values).iterator();
    }
}