Java 模拟 HTTP Get Post 请求实现论坛自动回帖

设计思路

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。

本文链接 http://www.alijava.com/simulate-bbs/ 转载请注明出处

  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

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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 

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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

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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

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