com.ajaxjs.net.http.Client Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of ajaxjs-base Show documentation
Show all versions of ajaxjs-base Show documentation
AJAXJS aims to full-stack, not only the server-side framework,
but also integrates the front-end library. It's written in HTML5 + Java, a successor to the JVM platform, efficient, secure, stable, cross-platform and many other advantages, but it abandoned the traditional enterprise architecture brought about by the large and bloated,
emphasizing the lightweight, and fast, very suitable for the Internet fast application.
/**
* Copyright 2015 Sp42 [email protected]
*
* 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.ajaxjs.net.http;
import java.io.File;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Map;
import com.ajaxjs.util.MapTool;
import com.ajaxjs.util.io.StreamUtil;
import com.ajaxjs.util.logger.LogHelper;
/**
* 远程请求器
*
* @author Sp42 [email protected]
*
*/
public class Client extends Connection {
private static final LogHelper LOGGER = LogHelper.getLog(Client.class);
/**
* 创建一个远程请求器
*
* @param url 请求目标地址
*/
public Client(String url) {
super(url);
}
/**
* 简单 GET 请求（原始 API 版），返回文本。
*
* @param url 请求目标地址
* @return 响应内容（如 HTML，JSON 等）
*/
public static String simpleGET(String url) {
StreamUtil client = new StreamUtil();
try {
client.setIn(new URL(url).openStream());
client.byteStream2stringStream().close();
return client.getContent();
} catch (IOException e) {// 简单调用，不作异常处理
return null;
}
}
/**
* 简单 GET 请求，返回文本。
*
* @param url 请求目标地址
* @return 响应内容（如 HTML，JSON 等）
*/
public static String GET(String url) {
try {
return new Client(url).connect().getContent();
} catch (ConnectException e) {
LOGGER.warning(e);
return null;
}
}
/**
* 简单 GET 请求（带 GZip 处理），返回文本。
*
* @param url 请求目标地址
* @return 响应内容（如 HTML，JSON 等）
*/
public static String GET_Gzip(String url) {
try {
return new Client(url).setEnableGzip(true).connect().getContent();
} catch (ConnectException e) {
LOGGER.warning(e);
return null;
}
}
/**
* HEAD 请求之前的准备
*
* @param url 请求目标地址
* @return 本类实例
*/
private static Client initHead(String url) {
Client client = new Client(url);
// 不需要转化响应文本，节省资源
client.setMethod("HEAD").setTextResponse(false).customConnection(new CustomConnection() {
@Override
public void callback(HttpURLConnection connection) {
connection.setInstanceFollowRedirects(false); // 必须设置 false，否则会自动 redirect 到 Location 的地址
}
});
return client;
}
/**
* 检测资源是否存在
*
* @param url 目标地址
* @return true 表示 404 不存在
*/
public static boolean is404(String url) {
try {
return initHead(url).connect().getConnection().getResponseCode() == 404;
} catch (ConnectException e) {
LOGGER.warning(e);
if (e.getMessage().indexOf("404") != -1) // 已知异常为 404
return true;
return false;
} catch (IOException e) {
LOGGER.warning(e);
return false;
}
}
/**
* 得到 HTTP 302 的跳转地址
*
* @param url 目标地址
* @return 跳转地址
*/
public static String get302redirect(String url) {
try {
return initHead(url).connect().getConnection().getHeaderField("Location");
} catch (ConnectException e) {
LOGGER.warning(e);
return null;
}
}
/**
* 得到资源的文件大小
*
* @param url 目标地址
* @return 文件大小
*/
public static long getFileSize(String url) {
String contentLength = null;
try {
contentLength = initHead(url).connect().getConnection().getHeaderField("content-length");
} catch (ConnectException e) {
LOGGER.warning(e);
return 0;
}
return Long.parseLong(contentLength);
}
/**
* 获取远程资源的大小 （另外一种写法，可作为参考之）
*
* @param url 目标地址
* @return 文件大小
*/
public static long getRemoteSize(String url) {
long size = 0;
try {
HttpURLConnection conn = (HttpURLConnection) (new URL(url)).openConnection();
size = conn.getContentLength();
conn.disconnect();
} catch (IOException e) {
LOGGER.warning(e);
}
return size;
}
/**
* POST 请求
*
* @param url 请求目标地址
* @param data 表单数据 KeyValue的请求数据，注意要进行 ? & 编码，使用 URLEncoder.encode()
* @return 携带请求信息的 Bean
*/
public static String POST(String url, Map data) {
if (data != null && data.size() > 0) {
return POST(url, MapTool.join(data).getBytes());
} else {
return null;
}
}
/**
* POST 请求
*
* @param url 请求目标地址
* @param params 字符串类型的请求数据
* @return 请求之后的响应的内容
*/
public static String POST(String url, String params) {
return POST(url, params.getBytes());
}
/**
* POST 请求
*
* @param url 请求目标地址
* @param b 字节格式的请求数据
* @return 请求之后的响应的内容
*/
public static String POST(String url, byte[] b) {
Client client = new Client(url);
client.setMethod("POST").setData(b);
client.getConnection().setDoOutput(true); // for conn.getOutputStream().write(someBytes);
client.getConnection().setDoInput(true);
client.getConnection().setRequestProperty("Content-type", "application/x-www-form-urlencoded;charset=utf-8");
try {
client.connect();
} catch (ConnectException e) {
LOGGER.warning(e);
return null;
}
client.setDone(true);
return client.getContent();
}
/**
* request 头和上传文件内容之间的分隔符
*/
private static final String BOUNDARY = "---------------------------123821742118716";
/**
* 多段 POST 的分隔
*/
// private static final String DIV = "\r\n--%s\r\nContent-Disposition: form-data; name=\"%s\"\r\n\r\n%s";
/**
* 模拟多段上传 TODO
*
* @param url 请求目标地址
* @param text 文本数据
* @param fileMap 二进制（文件）数据
* @return 携带请求信息的 Bean
*/
public static String multiPOST(String url, Map text, Map fileMap) {
byte[] data = null;
if (fileMap != null && fileMap.size() > 0) {
for (String name : fileMap.keySet()) {
String value = fileMap.get(name);
File file = new File(value);
String filename = file.getName();
// String contentType = FileUtil.getMime(file);
// String str = String.format(DIV, BOUNDARY, name, filename) + "Content-Type:" +
// contentType + "\r\n\r\n";
StringBuffer strBuf = new StringBuffer();
strBuf.append("\r\n").append("--").append(BOUNDARY).append("\r\n");
strBuf.append("Content-Disposition: form-data; name=\"" + "ddd" + "\"; filename=\"" + filename + "\"\r\n");
// strBuf.append("Content-Type:" + contentType + "\r\n\r\n");
// out.write(strBuf.toString().getBytes());
StreamUtil.concat(data, strBuf.toString().getBytes());
StreamUtil.concat(data, StreamUtil.fileAsByte(file));
}
}
StreamUtil.concat(data, ("\r\n--" + BOUNDARY + "--\r\n").getBytes());
Client client = new Client(url);
client.setData(data);
client.getConnection().setDoOutput(true); // for conn.getOutputStream().write(someBytes);
client.getConnection().setDoInput(true);
client.getConnection().setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY);
try {
client.connect();
} catch (ConnectException e) {
LOGGER.warning(e);
return null;
}
client.setDone(true);
return client.getContent();
}
}