代码样例-API接口

package com.kuaidaili.sdk;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.Authenticator;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.PasswordAuthentication;
import java.net.Proxy;
import java.net.URL;
import java.net.URLEncoder;
import java.nio.charset.Charset;
import java.util.Map;
import java.util.Vector;
import java.util.zip.GZIPInputStream;

/**
 * HTTP请求对象
 */
public class HttpRequest {

    private String defaultContentEncoding;
    private int connectTimeout = 1000;
    private int readTimeout = 1000;

    public HttpRequest() {
        this.defaultContentEncoding = Charset.defaultCharset().name();
    }

    /**
     * 发送GET请求
     *
     * @param urlString URL地址
     * @param proxySettings 代理设置，null代表不设置代理
     * @return 响应对象
     */
    public HttpResponse sendGet(String urlString, final Map<String, String> proxySettings) throws IOException {
        return this.send(urlString, "GET", null, null, proxySettings);
    }

    /**
     * 发送GET请求
     *
     * @param urlString URL地址
     * @param params 参数集合
     * @param proxySettings 代理设置，null代表不设置代理
     * @return 响应对象
     */
    public HttpResponse sendGet(String urlString, Map<String, String> params, final Map<String, String> proxySettings)
            throws IOException {
        return this.send(urlString, "GET", params, null, proxySettings);
    }

    /**
     * 发送GET请求
     *
     * @param urlString URL地址
     * @param params 参数集合
     * @param headers header集合
     * @param proxySettings 代理设置，null代表不设置代理
     * @return 响应对象
     */
    public HttpResponse sendGet(String urlString, Map<String, String> params,
            Map<String, String> headers, final Map<String, String> proxySettings) throws IOException {
        return this.send(urlString, "GET", params, headers, proxySettings);
    }

    /**
     * 发送POST请求
     *
     * @param urlString URL地址
     * @param proxySettings 代理设置，null代表不设置代理
     * @return 响应对象
     */
    public HttpResponse sendPost(String urlString, final Map<String, String> proxySettings) throws IOException {
        return this.send(urlString, "POST", null, null, proxySettings);
    }

    /**
     * 发送POST请求
     *
     * @param urlString URL地址
     * @param params 参数集合
     * @param proxySettings 代理设置，null代表不设置代理
     * @return 响应对象
     */
    public HttpResponse sendPost(String urlString, Map<String, String> params, final Map<String, String> proxySettings)
            throws IOException {
        return this.send(urlString, "POST", params, null, proxySettings);
    }

    /**
     * 发送POST请求
     *
     * @param urlString URL地址
     * @param params 参数集合
     * @param headers header集合
     * @param proxySettings 代理设置，null代表不设置代理
     * @return 响应对象
     */
    public HttpResponse sendPost(String urlString, Map<String, String> params,
            Map<String, String> headers, final Map<String, String> proxySettings) throws IOException {
        return this.send(urlString, "POST", params, headers, proxySettings);
    }

    /**
     * 发送HTTP请求
     */
    private HttpResponse send(String urlString, String method,
            Map<String, String> parameters, Map<String, String> headers, final Map<String, String> proxySettings)
            throws IOException {
        HttpURLConnection urlConnection = null;

        if (method.equalsIgnoreCase("GET") && parameters != null) {
            StringBuffer param = new StringBuffer();
            int i = 0;
            for (String key : parameters.keySet()) {
                if (i == 0)
                    param.append("?");
                else
                    param.append("&");
                param.append(key).append("=").append(URLEncoder.encode(parameters.get(key), "utf-8"));
                i++;
            }
            urlString += param;
        }
        URL url = new URL(urlString);
        if(proxySettings != null){
            Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxySettings.get("ip"), Integer.parseInt(proxySettings.get("port"))));
            urlConnection = (HttpURLConnection) url.openConnection(proxy);
            if(proxySettings.containsKey("username")){
                Authenticator authenticator = new Authenticator() {
                    public PasswordAuthentication getPasswordAuthentication() {
                        return (new PasswordAuthentication(proxySettings.get("username"),
                                proxySettings.get("password").toCharArray()));
                    }
                };
                Authenticator.setDefault(authenticator);
            }
        }
        else{
            urlConnection = (HttpURLConnection) url.openConnection();
        }

        urlConnection.setRequestMethod(method);
        urlConnection.setDoOutput(true);
        urlConnection.setDoInput(true);
        urlConnection.setUseCaches(false);

        urlConnection.setConnectTimeout(connectTimeout);
        urlConnection.setReadTimeout(readTimeout);

        if (headers != null)
            for (String key : headers.keySet()) {
                urlConnection.addRequestProperty(key, headers.get(key));
            }

        if (method.equalsIgnoreCase("POST") && parameters != null) {
            StringBuffer param = new StringBuffer();
            int i = 0;
            for (String key : parameters.keySet()) {
                if(i > 0) param.append("&");
                param.append(key).append("=").append(URLEncoder.encode(parameters.get(key), "utf-8"));
                i++;
            }
            System.out.println(param.toString());
            urlConnection.getOutputStream().write(param.toString().getBytes());
            urlConnection.getOutputStream().flush();
            urlConnection.getOutputStream().close();
        }

        return this.makeContent(urlString, urlConnection);
    }

    /**
     * 得到响应对象
     */
    private HttpResponse makeContent(String urlString,
            HttpURLConnection urlConnection) throws IOException {
        HttpResponse response = new HttpResponse();
        try {
            InputStream in = urlConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in));
            if ("gzip".equals(urlConnection.getContentEncoding())) bufferedReader =  new BufferedReader(new InputStreamReader(new GZIPInputStream(in)));
            response.contentCollection = new Vector<String>();
            StringBuffer temp = new StringBuffer();
            String line = bufferedReader.readLine();
            while (line != null) {
                response.contentCollection.add(line);
                temp.append(line).append("\r\n");
                line = bufferedReader.readLine();
            }
            bufferedReader.close();

            String encoding = urlConnection.getContentEncoding();
            if (encoding == null)
                encoding = this.defaultContentEncoding;

            response.urlString = urlString;

            response.defaultPort = urlConnection.getURL().getDefaultPort();
            response.file = urlConnection.getURL().getFile();
            response.host = urlConnection.getURL().getHost();
            response.path = urlConnection.getURL().getPath();
            response.port = urlConnection.getURL().getPort();
            response.protocol = urlConnection.getURL().getProtocol();
            response.query = urlConnection.getURL().getQuery();
            response.ref = urlConnection.getURL().getRef();
            response.userInfo = urlConnection.getURL().getUserInfo();
            response.contentLength = urlConnection.getContentLength();

            response.content = new String(temp.toString().getBytes());
            response.contentEncoding = encoding;
            response.code = urlConnection.getResponseCode();
            response.message = urlConnection.getResponseMessage();
            response.contentType = urlConnection.getContentType();
            response.method = urlConnection.getRequestMethod();
            response.connectTimeout = urlConnection.getConnectTimeout();
            response.readTimeout = urlConnection.getReadTimeout();

            return response;
        } catch (IOException e) {
            throw e;
        } finally {
            if (urlConnection != null){
                urlConnection.disconnect();
            }
        }
    }

    public static byte[] gunzip(byte[] bytes) {  
        if (bytes == null || bytes.length == 0) {  
            return null;  
        }  
        ByteArrayOutputStream out = new ByteArrayOutputStream();  
        ByteArrayInputStream in = new ByteArrayInputStream(bytes);  
        try {  
            GZIPInputStream ungzip = new GZIPInputStream(in);  
            byte[] buffer = new byte[256];  
            int n;  
            while ((n = ungzip.read(buffer)) >= 0) {  
                out.write(buffer, 0, n);  
            }  
        } catch (IOException e) {  
            System.err.println("gzip uncompress error.");
            e.printStackTrace();
        }  

        return out.toByteArray();  
    }

    /**
     * 得到默认的响应字符集
     */
    public String getDefaultContentEncoding() {
        return this.defaultContentEncoding;
    }

    /**
     * 设置默认的响应字符集
     */
    public void setDefaultContentEncoding(String defaultContentEncoding) {
        this.defaultContentEncoding = defaultContentEncoding;
    }

    public int getConnectTimeout() {
        return connectTimeout;
    }

    public void setConnectTimeout(int connectTimeout) {
        this.connectTimeout = connectTimeout;
    }

    public int getReadTimeout() {
        return readTimeout;
    }

    public void setReadTimeout(int readTimeout) {
        this.readTimeout = readTimeout;
    }
}

package com.kuaidaili.sdk;

import java.util.Vector;

/**
 * HTTP响应对象
 */
public class HttpResponse {

    String urlString;
    int defaultPort;
    String file;
    String host;
    String path;
    int port;
    String protocol;
    String query;
    String ref;
    String userInfo;
    String contentEncoding;
    int contentLength;
    String content;
    String contentType;
    int code;
    String message;
    String method;

    int connectTimeout;

    int readTimeout;

    Vector<String> contentCollection;

    public String getContent() {
        return content;
    }

    public String getContentType() {
        return contentType;
    }

    public int getCode() {
        return code;
    }

    public String getMessage() {
        return message;
    }

    public Vector<String> getContentCollection() {
        return contentCollection;
    }

    public String getContentEncoding() {
        return contentEncoding;
    }

    public String getMethod() {
        return method;
    }

    public int getConnectTimeout() {
        return connectTimeout;
    }

    public int getReadTimeout() {
        return readTimeout;
    }

    public String getUrlString() {
        return urlString;
    }

    public int getDefaultPort() {
        return defaultPort;
    }

    public String getFile() {
        return file;
    }

    public String getHost() {
        return host;
    }

    public String getPath() {
        return path;
    }

    public int getPort() {
        return port;
    }

    public String getProtocol() {
        return protocol;
    }

    public String getQuery() {
        return query;
    }

    public String getRef() {
        return ref;
    }

    public String getUserInfo() {
        return userInfo;
    }
}