se.kodapan.io.http.HttpGetInputStream.java Source code

Introduction

Here is the source code for se.kodapan.io.http.HttpGetInputStream.java

Source

/*
 * Copyright 2010 Kodapan
 *
 * 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 se.kodapan.io.http;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;

/**
 * @author kalle
 * @since 2010-apr-25 22:11:29
 */
public class HttpGetInputStream extends InputStream {

    URI uri;
    HttpClient httpClient;

    public HttpGetInputStream(URI uri) {
        this(uri, new DefaultHttpClient());
    }

    public HttpGetInputStream(URI uri, HttpClient httpClient) {
        this.uri = uri;
        this.httpClient = httpClient;
    }

    public HttpGetInputStream(String uri) throws URISyntaxException {
        this(uri, new DefaultHttpClient());
    }

    public HttpGetInputStream(String uri, HttpClient httpClient) throws URISyntaxException {
        this.uri = new URI(uri);
        this.httpClient = httpClient;
    }

    private InputStream httpInputStream;

    @Override
    public int read() throws IOException {
        if (httpInputStream == null) {
            factory();
        }
        return httpInputStream.read();
    }

    @Override
    public int read(byte[] bytes) throws IOException {
        if (httpInputStream == null) {
            factory();
        }
        return httpInputStream.read(bytes);
    }

    @Override
    public int read(byte[] bytes, int i, int i1) throws IOException {
        if (httpInputStream == null) {
            factory();
        }
        return httpInputStream.read(bytes, i, i1);
    }

    private void factory() throws IOException {
        HttpGet get = new HttpGet(uri);
        HttpClientUtil.addResponseHeaders(get);
        HttpResponse httpResponse = httpClient.execute(get);

        InputStream httpInputStream = httpResponse.getEntity().getContent();
        if (httpInputStream == null) {
            httpResponse.getEntity().consumeContent();
            throw new IOException(httpResponse.getStatusLine().toString());
        }

        this.httpInputStream = httpInputStream;
    }

    @Override
    public void close() throws IOException {
        if (httpInputStream != null) {
            httpInputStream.close();
        }
        httpClient.getConnectionManager().shutdown();
    }
}