Java模拟HTTP Get Post请求实现论坛自动回帖功能

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最近想自动发帖回帖，拿某论坛试验了一下，发现可行，不过后续没有再使用，以免影响论坛正常运行。

1、帖子链接的格式为
http://bbs.***.***.**/forum.php?mod=viewthread&tid=774210

最后面774210数字变化, 就可以得到不同的帖子

2、防止帖子发表会又被删了的情况, 进行判断帖子是否存在

3、递增后面的 id 数字, 对每个链接做回帖的 POST 请求

重难点

回帖需要用户登录信息
一种是利用Cookie
另一种是进行模拟登录

本文采用前者

判断 url 对应的帖子是否存在
有可能用户发了帖子，比如 url 为 http://bbs.***.***.**/forum.php?mod=viewthread&tid=774200

后来该帖子用户删除了或者被管理员删除了，虽然帖子不在了，但是该 tid=774200 还是存在的

public static boolean isExist(int id) {
 String tmpPath = baseRefer + id;
 URL url;
 try {
 url = new URL(tmpPath);
 HttpURLConnection con = (HttpURLConnection) url.openConnection();
 con.addRequestProperty("Content-Type", "text/html; charset=UTF-8");
 con.addRequestProperty(
  "User-Agent",
  "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.104 Safari/537.36");
 con.addRequestProperty("Referer", "http://t.dianping.com/register");
 con.setRequestMethod("GET");
 if (con.getResponseCode() == 200) {
  InputStream inputStr = con.getInputStream();
  String info = new String(StreamTool.read(inputStr), "UTF-8");
  if (info.contains("抱歉，指定的主题不存在或已被删除或正在被审核")) {
  System.out.println("id=" + id + "帖子存在或已被删除！");
  return false;
  }
 }
 } catch (MalformedURLException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 } catch (IOException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 } catch (Exception e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 return true;
}

模拟发帖
代码比较简单，注意事项是找到自己的Cookie，赋给String yourCookeie

用post发送一个回帖，回帖信息在 mapData.put("message", "友情帮顶了") 中

private static final String baseRefer = "http://bbs.**.**.**/forum.php?mod=viewthread&tid=";
private static final String yourCookeie = "Q8qA_2132_saltkey=**; Q8qA_2132_lastvisit=****3699;";
public static void main(String[] args) {
 int startId = 774210; // you need change
 for (int i = 0; i < 100; i++) {
 postMessage(startId);
 startId++;
 }
}
public static void postMessage(int id) {
 if (!isExist(id)) {
 return;
 }
 String tmpPath = baseRefer + id;
 StringBuilder path = new StringBuilder(tmpPath);
 Map<String, String> mapData = new LinkedHashMap<String, String>();
 mapData.put("mod", "post");
 mapData.put("action", "reply");
 mapData.put("replysubmit", "yes");
 mapData.put("infloat", "yes");
 mapData.put("handlekey", "fastpost");
 mapData.put("inajax", "1");
 mapData.put("message", "友情帮顶了");
 mapData.put("formhash", "86ec5d81");
 try {
 for (Map.Entry<String, String> mapEnt : mapData.entrySet()) {
  path.append("&");
  path.append(mapEnt.getKey() + "=");
  path.append(URLEncoder.encode(mapEnt.getValue(), "UTF-8"));
 }
 URL url = new URL(path.toString());
 HttpURLConnection con = (HttpURLConnection) url.openConnection();
 con.setRequestMethod("POST");
 con.setRequestProperty("Content-Type",
  "application/x-www-form-urlencoded");
 con.setRequestProperty("Content-Length",
  String.valueOf(path.length()));
 con.setRequestProperty(
  "User-Agent",
  "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.104 Safari/537.36");
 con.setRequestProperty("Cookie", yourCookeie);
 con.setDoOutput(true);
 OutputStream outStr = con.getOutputStream();
 outStr.write(path.toString().getBytes());
 if (con.getResponseCode() == 200) {
  InputStream inputStr = con.getInputStream();
  String info = new String(StreamTool.read(inputStr), "UTF-8");
  System.out.println("在id=" + id + "成功发帖！");
  try {
  Thread.sleep(20 * 1000);
  } catch (InterruptedException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  }
 }
 } catch (UnsupportedEncodingException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 } catch (MalformedURLException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 } catch (IOException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 } catch (Exception e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
}

还有一个工具方法，将输入流转化为字节

class StreamTool {
 public static byte[] read(InputStream inputStr) throws Exception {
 ByteArrayOutputStream outStr = new ByteArrayOutputStream();
 // TODO Auto-generated method stub
 byte[] buffer = new byte[1024];
 int len = 0;
 while ((len = inputStr.read(buffer)) != -1) {
  outStr.write(buffer, 0, len);
 }
 inputStr.close();
 return outStr.toByteArray();
 }
}

效果图：