JAVA获取百度网盘下载真实地址

这是一个java写的获取百度网盘真实下载链接进行下载的程序。
程序里面一些参数拼接是根据浏览器抓包来的。具体的抓包方法网上一大堆，可以参考。这里给出了源码和导出的jar包。
url网址使用于百度分享的地址。暂时没有适配有提取码的地址。

运行的方法：
1、在当前的目录打开cmd，默认不带参数就是用默认的测试的url。
java -jar BaiduPanURL.jar

2、如果想使用自己定义的资源地址可以在后面加一个参数。
java -jar BaiduPanURL.jar your_url

注意：百度网盘同一个ip进行3次下载之后就需要验证码。程序会在当前的目录生成验证码，输入正确的验证码后可以进行下载。

本人亲测有效，百度会限制下载的速率，测试只有100kb左右。

程序源码：
1、GetBaiduCloudRealURL：

    package com.example.download;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.util.HashMap;import java.util.Map;import java.util.regex.Matcher;import java.util.regex.Pattern;import com.example.bean.Response20;import com.example.bean.SetDataBean;import com.google.gson.Gson;/*** 输入百度网盘的资源地址，获取网盘的真实下载地址。* * @author gaoqiang* */public class GetBaiduCloudRealURL {// 定义一些全局变量private static String url = "https://pan.baidu.com/s/1eQrwbKY";// 资源地址private static String cookie = null;private static final String getvcodeURL = "https://pan.baidu.com/api/getvcode?prod=pan";// 请求vcode地址，不变private static boolean isDownload = true;//标记是否需要下载文件，false就只获取地址private static String server_filename = null;private static String size = null;// 通过浏览器抓包分析，获取百度网盘共享文件的真实下载地址public static void main(String[] args) {if (args.length > 0) {System.out.println("输入的原始地址：" + args[0]);url = args[0];}// 第一次获取cookie（）Map<String, String> map1 = HttpUtils.get(url, cookie);System.out.println("服务器返回的cookie：\n" + map1.get("cookie") + "\n");cookie = "PANWEB=1;" + map1.get("cookie").split(";")[0];// 抓包看到携带了PANWEB1，不设置也没问题Map<String, String> params = getBodyParams(map1.get("body"));server_filename = params.get("server_filename");size = params.get("size");// 拼接post的url地址String post_url = getPostUrl(params);// 拼接post携带的参数Map<String, String> data = getPostData(params);// 发送post请求String responseJson = HttpUtils.post(post_url, data, cookie);System.out.println(responseJson + "\n");Gson gson = new Gson();Response20 response20 = gson.fromJson(responseJson, Response20.class);String errorCode = response20.getErrno();int count = 0;while (!errorCode.equals("0") && count < 5) {count++;if (errorCode.equals("-20")) {// 下载超过3次，需要验证码,获取vcode和img地址Map<String, String> generateValidateCode = generateValidateCode(count);data.put("vcode_input", generateValidateCode.get("vcode_input"));data.put("vcode_str", generateValidateCode.get("vcode_str"));String responseJsonCode = HttpUtils.post(post_url, data, cookie);System.out.println(responseJsonCode + "\n");errorCode = gson.fromJson(responseJsonCode, Response20.class).getErrno();if (errorCode.equals("0")) {responseJson = responseJsonCode;}}}if (errorCode.equals("0")) {// 成功返回真实的urlString realURL = parseRealDownloadURL(responseJson);System.out.println("成功！真实的下载链接为：" + realURL);if (isDownload) {System.out.println("正在下载文件...");HttpUtils.download(realURL, cookie, server_filename, size);// 进行下载}else{System.out.println("配置不下载");}} else {System.out.println("尝试了" + count + "次，地址获取失败");}}/*** POST请求的url地址*/public static String getPostUrl(Map<String, String> params) {/*** post请求（抓包可看到） 抓包看到logid，实际测试logid不携带也可以正常抓取* https://pan.baidu.com/api/* sharedownload?sign=2d970c761500085deb09d423d549dea2f4ef28da* &timestamp=* 1515400310&bdstoken=null&channel=chunlei&clienttype=0&web=1* &app_id=250528&logid=MTUxNTQwMDQ1NTc1MTAuOTYwMTE4NzIyMzcxMzYwNQ==*/StringBuffer sb1 = new StringBuffer();sb1.append("https://pan.baidu.com/api/sharedownload?");sb1.append("sign=" + params.get("sign"));sb1.append("&timestamp=" + params.get("timestamp"));sb1.append("&bdstoken=" + params.get("bdstoken"));sb1.append("&channel=chunlei");sb1.append("&clienttype=0");sb1.append("&web=1");sb1.append("&app_id=" + params.get("app_id"));String post_url = sb1.toString();System.out.println("POST请求的网址：" + post_url);return post_url;}/*** 获取POST请求携带的参数*/public static Map<String, String> getPostData(Map<String, String> params) {// POST携带的参数(抓包可看到)Map<String, String> data = new HashMap<String, String>();data.put("encrypt", "0");data.put("product", "share");data.put("uk", params.get("uk"));data.put("primaryid", params.get("primaryid"));// 添加了[]，解码就是%5B %5Ddata.put("fid_list", "%5B" + params.get("fid_list") + "%5D");data.put("path_list", "");// 可以不写return data;}/*** 从post返回数据解析出dlink字段，真实的下载地址，这个地址有效期8h*/public static String parseRealDownloadURL(String responseJson) {String realURL = "";Pattern pattern = Pattern.compile("\"dlink\":.*?,");Matcher matcher = pattern.matcher(responseJson);if (matcher.find()) {String tmp = matcher.group(0);String dlink = tmp.substring(9, tmp.length() - 2);realURL = dlink.replaceAll("\\\\", "");}return realURL;}/*** 获取并输入验证码* * @return map{vcode_str:请求的vcode值, vcode_input:输入的验证码}*/public static Map<String, String> generateValidateCode(int count) {// 下载超过3次，需要验证码,获取vcode和img地址Map<String, String> vcodeResponse = HttpUtils.get(getvcodeURL, cookie);String res = vcodeResponse.get("body");System.out.println("获取vcode：" + vcodeResponse.get("body"));Gson gsonVcode = new Gson();Response20 responseVcode = gsonVcode.fromJson(res, Response20.class);String vcode = responseVcode.getVcode();String imgURL = responseVcode.getImg();System.out.println("vcode值：" + vcode);System.out.println("验证码地址：" + imgURL);// 请求验证码HttpUtils.saveImage(imgURL, cookie);System.out.print("查看图片，输入验证码(第" + count + "次尝试/共5次):");InputStreamReader is_reader = new InputStreamReader(System.in);Map<String, String> map = new HashMap<String, String>();try {String result = new BufferedReader(is_reader).readLine();System.out.println("输入的验证码为：" + result + "\n");map.put("vcode_str", vcode);map.put("vcode_input", result);} catch (IOException e) {e.printStackTrace();}return map;}/*** 正则匹配出json字符串，将json字符串转化为java对象。*/public static Map<String, String> getBodyParams(String body) {Map<String, String> map = new HashMap<String, String>();String setData = "";Pattern pattern_setData = Pattern.compile("setData.*?;");Matcher matcher_setData = pattern_setData.matcher(body);if (matcher_setData.find()) {String tmp = matcher_setData.group(0);setData = tmp.substring(8, tmp.length() - 2);// System.out.println("setData:" + setData + "\n");Gson gson = new Gson();SetDataBean bean = gson.fromJson(setData, SetDataBean.class);System.out.println("sign--" + bean.getSign());System.out.println("token--" + bean.getBdstoken());System.out.println("timestamp--" + bean.getTimestamp());System.out.println("uk--" + bean.getUk());System.out.println("shareid--" + bean.getShareid());System.out.println("fs_id--" + bean.getFile_list().getList()[0].getFs_id());System.out.println("file_name--" + bean.getFile_list().getList()[0].getServer_filename());System.out.println("size--" + bean.getFile_list().getList()[0].getSize());System.out.println("app_id--" + bean.getFile_list().getList()[0].getApp_id() + "\n");map.put("sign", bean.getSign());map.put("timestamp", bean.getTimestamp());map.put("bdstoken", bean.getBdstoken());map.put("app_id", bean.getFile_list().getList()[0].getApp_id());map.put("uk", bean.getUk());map.put("shareid", bean.getShareid());map.put("primaryid", bean.getShareid());map.put("fs_id", bean.getFile_list().getList()[0].getFs_id());map.put("fid_list", bean.getFile_list().getList()[0].getFs_id());map.put("server_filename", bean.getFile_list().getList()[0].getServer_filename());map.put("size", bean.getFile_list().getList()[0].getSize());}return map;}}

2、HttpUtils：

    package com.example.download;import java.io.BufferedReader;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.net.HttpURLConnection;import java.net.URL;import java.net.URLConnection;import java.util.HashMap;import java.util.Map;public class HttpUtils {/*** 向指定URL发送GET方法的请求 返回cookie，body等* 会返回流里面的内容，如果下载大文件，需要修改，实时保存，避免内存溢出*/public static Map<String, String> get(String url, String cookie) {BufferedReader in = null;Map<String, String> map = new HashMap<String, String>();try {URL realUrl = new URL(url);// 打开和URL之间的连接URLConnection connection = realUrl.openConnection();// 设置通用的请求属性connection.setRequestProperty("accept", "*/*");connection.setRequestProperty("connection", "Keep-Alive");connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");connection.setConnectTimeout(5000);connection.setReadTimeout(5000);if (null != cookie) {//System.out.println("携带的Cookie:" + cookie);connection.setRequestProperty("Cookie", cookie);}// 建立实际的连接connection.connect();// 定义 BufferedReader输入流来读取URL的响应in = new BufferedReader(new InputStreamReader(connection.getInputStream()));StringBuffer sb = new StringBuffer();String line;while ((line = in.readLine()) != null) {sb.append(line + "\n");//System.out.println("内容：" + line);}String c = connection.getHeaderField("Set-Cookie");map.put("cookie", c);map.put("body", sb.toString());return map;} catch (Exception e) {System.err.println(e.getMessage());} finally {try {if (in != null) {in.close();}} catch (Exception e2) {e2.printStackTrace();}}return null;}/*** 保存验证码*/public static Map<String, String> saveImage(String url, String cookie) {Map<String, String> map = new HashMap<String, String>();InputStream in = null;FileOutputStream fos = null;try {URL realUrl = new URL(url);// 打开和URL之间的连接URLConnection connection = realUrl.openConnection();// 设置通用的请求属性connection.setRequestProperty("accept", "*/*");connection.setRequestProperty("connection", "Keep-Alive");connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");connection.setConnectTimeout(5000);connection.setReadTimeout(5000);if (null != cookie) {connection.setRequestProperty("Cookie", cookie);}// 建立实际的连接connection.connect();in = connection.getInputStream();fos = new FileOutputStream("img.jpeg");int b;while((b= in.read())!=-1){fos.write(b);}return map;} catch (Exception e) {System.err.println(e.getMessage());} finally {try {if (in != null) {in.close();}if(fos != null){fos.close();}} catch (Exception e2) {e2.printStackTrace();}}return null;}static int downloadSize = 0;static boolean isReading = false;//是否在读流，更新进度static long startTime = 0 ;static long endTime = 0 ;/*** 下载文件*/public static Map<String, String> download(String url, String cookie, String filename, final String totalSize) {InputStream in = null;FileOutputStream fos = null;Map<String, String> map = new HashMap<String, String>();try {URL realUrl = new URL(url);// 打开和URL之间的连接URLConnection connection = realUrl.openConnection();// 设置通用的请求属性connection.setRequestProperty("accept", "*/*");connection.setRequestProperty("connection", "Keep-Alive");connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");connection.setConnectTimeout(10000);//          connection.setReadTimeout(5000);if (null != cookie) {connection.setRequestProperty("Cookie", cookie);}// 建立实际的连接connection.connect();in = connection.getInputStream();fos = new FileOutputStream(filename);System.out.println("保存文件名称：" + filename);System.out.println("文件总大小：" + totalSize);//利用字符数组读取流数据startTime = System.currentTimeMillis();//每隔1s读一次数据new Thread(){@Overridepublic void run() {String total = UnitSwitch.formatSize(Long.parseLong(totalSize));StringBuffer sb = new StringBuffer();for (int i = 0; i < 20; i++) {sb.append("\b");}while(isReading){endTime = System.currentTimeMillis();String speed = UnitSwitch.calculateSpeed(downloadSize, endTime-startTime);System.out.println(UnitSwitch.formatSize(downloadSize) + "/" + total + "，平均下载速率：" + speed);try {sleep(2000);} catch (InterruptedException e) {e.printStackTrace();}}}}.start();isReading = true;int len;byte[] arr = new byte[1024 * 8];while((len = in.read(arr)) != -1) {fos.write(arr, 0, len);downloadSize += len;}endTime = System.currentTimeMillis();String speed = UnitSwitch.calculateSpeed(downloadSize, endTime-startTime);String total = UnitSwitch.formatSize(Long.parseLong(totalSize));System.out.println(UnitSwitch.formatSize(downloadSize) + "/" + total + "，平均下载速率：" + speed);System.out.println("下载完成，总耗时：" + (endTime - startTime)/1000 + "秒");return map;} catch (Exception e) {System.err.println(e.getMessage());} finally {isReading = false;try {if (in != null) {in.close();}if(fos != null){fos.close();}} catch (Exception e2) {e2.printStackTrace();}}return null;}/*** 发送HttpPost请求* * @param strURL*            服务地址* @param params* * @return 成功:返回json字符串<br/>*/public static String post(String strURL, Map<String, String> params, String cookie) {try {URL url = new URL(strURL);// 创建连接HttpURLConnection connection = (HttpURLConnection) url.openConnection();connection.setDoOutput(true);connection.setDoInput(true);connection.setUseCaches(false);connection.setInstanceFollowRedirects(true);connection.setRequestMethod("POST"); // 设置请求方式connection.setRequestProperty("Accept", "*/*"); // 设置接收数据的格式connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8"); // 设置发送数据的格式if (null != cookie) {System.out.println("携带的Cookie:" + cookie);connection.setRequestProperty("Cookie", cookie);}connection.connect();OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream(), "UTF-8"); // utf-8编码StringBuffer sb = new StringBuffer();for (String s : params.keySet()) {sb.append(s + "=" + params.get(s) + "&");}System.out.println("携带的参数：" + sb.toString().substring(0, sb.length() - 1));out.append(sb.toString().substring(0, sb.length() - 1));out.flush();out.close();int code = connection.getResponseCode();BufferedReader in = null;if (code == 200) {in = new BufferedReader(new InputStreamReader(connection.getInputStream()));} else {in = new BufferedReader(new InputStreamReader(connection.getErrorStream()));}System.out.println("响应码：" + code);// 定义BufferedReader输入流来读取URL的响应String line;StringBuffer sb1 = new StringBuffer();while ((line = in.readLine()) != null) {sb1.append(line);}return sb1.toString();} catch (IOException e) {System.err.println(e.getMessage());return "error";}}}

3、UnitSwitch：

package com.example.download;
import java.text.DecimalFormat;
public class UnitSwitch {/*** 处理文件大小*/public static String formatSize(long size) {DecimalFormat fnum = new DecimalFormat("##0.0");String result;if (size > (1024 * 1024 * 1024)) {result = fnum.format((size / ((float) (1024 * 1024 * 1024)))) + "GB";}else if (size > (1024 * 1024)) {result = fnum.format((size / ((float) (1024 * 1024)))) + "MB";} else if (size > 1024) {result = fnum.format((float) size / ((float) 1024)) + "KB";} else {result = String.valueOf((int) size) + "B";}return result;}/*** @author gaoqiang*         <p>*         计算网络速率*         <p>*         返回的格式 Kb/s* @param delta*            ： 传入一个Bytes数据* @param duration_time*            ： 下载delta数据所需要用的时间* @return*/public static String calculateSpeed(long delta, long duration_time) {DecimalFormat fnum = new DecimalFormat("##0.0");String speedStr;float speed = ((float) delta * 1000 / (float) (duration_time));// 毫秒转换if (speed > (1024 * 1024)) {speedStr = fnum.format((speed / ((float) (1024 * 1024)))) + "M/s";} else if (speed > 1024) {speedStr = fnum.format((float) speed / ((float) 1024)) + "K/s";} else {speedStr = String.valueOf((int) speed) + "B/s";}return speedStr;}
}

4、Response20：

    package com.example.bean;/*** 服务器返回的json，转java对象* 错误码为20 代表需要验证码* @author gaoqiang**/public class Response20 {String errno;String request_id;String server_time;String vcode;String img;public String getErrno() {return errno;}public void setErrno(String errno) {this.errno = errno;}public String getRequest_id() {return request_id;}public void setRequest_id(String request_id) {this.request_id = request_id;}public String getServer_time() {return server_time;}public void setServer_time(String server_time) {this.server_time = server_time;}public String getVcode() {return vcode;}public void setVcode(String vcode) {this.vcode = vcode;}public String getImg() {return img;}public void setImg(String img) {this.img = img;}}

5、SetDataBean：

    package com.example.bean;public class SetDataBean {private String sign;private String timestamp;private String bdstoken;private String uk;private String shareid;private FileList file_list;public String getSign() {return sign;}public void setSign(String sign) {this.sign = sign;}public String getTimestamp() {return timestamp;}public void setTimestamp(String timestamp) {this.timestamp = timestamp;}public String getBdstoken() {return bdstoken;}public void setBdstoken(String bdstoken) {this.bdstoken = bdstoken;}public String getUk() {return uk;}public void setUk(String uk) {this.uk = uk;}public String getShareid() {return shareid;}public void setShareid(String shareid) {this.shareid = shareid;}public FileList getFile_list() {return file_list;}public void setFile_list(FileList file_list) {this.file_list = file_list;}public static class FileList {String errno;List[] list;public String getErrno() {return errno;}public void setErrno(String errno) {this.errno = errno;}public List[] getList() {return list;}public void setList(List[] list) {this.list = list;}}public static class List {String app_id;String fs_id;String server_filename;String size;public String getApp_id() {return app_id;}public void setApp_id(String app_id) {this.app_id = app_id;}public String getFs_id() {return fs_id;}public void setFs_id(String fs_id) {this.fs_id = fs_id;}public String getServer_filename() {return server_filename;}public void setServer_filename(String server_filename) {this.server_filename = server_filename;}public String getSize() {return size;}public void setSize(String size) {this.size = size;}}}

6、运行的截图：

运行的参数图：

效果图：

亲测有效。百度网盘请求的参数可能会变，但是方法不会变。通过浏览器抓包就可以分析修改。
工程源码下载地址:http://download.csdn.net/download/gaopinqiang/10197336

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