从 Java 套接字 InputStream 读取请求内容，总是在 header 之后挂起
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Reading request content from Java socket InputStream, always hangs after header
提问by Zugdud
I am trying to use core Java to read HTTP request data from an inputstream, using the following code:
我正在尝试使用核心 Java 从输入流中读取 HTTP 请求数据，使用以下代码：
BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null)
System.out.println(inputLine);
in.close();
I receive the header fine, but then the client just hangs forever because the server never finds "EOF" of the request. How do I handle this? I've seen this question asked quite a bit, and most solutions involve something like the above, however it's not working for me. I've tried using both curl and a web browser as the client, just sending a get request
我收到的标头很好，但是客户端永远挂起，因为服务器永远找不到请求的“EOF”。我该如何处理？我已经看到这个问题问了很多，大多数解决方案都涉及上述内容，但是它对我不起作用。我已经尝试使用 curl 和 Web 浏览器作为客户端，只是发送一个 get 请求
Thanks for any ideas
感谢您的任何想法
回答by Tom Holmes
An HTTP request ends with a blank line (optionally followed by request data such as form data or a file upload), not an EOF. You want something like this:
HTTP 请求以空行结束（可选地后跟请求数据，例如表单数据或文件上传），而不是 EOF。你想要这样的东西：
BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
String inputLine;
while (!(inputLine = in.readLine()).equals(""))
System.out.println(inputLine);
in.close();
回答by Vrakfall
In addition to the answer above (as I am not able to post comments yet), I'd like to add that some browsers like Opera (I guess it was what did it, or it was my ssl setup, I don't know) send an EOF. Even if not the case, you would like to prevent that in order for your server not to crash because of a NullPointerException.
除了上面的答案（因为我还不能发表评论），我想补充一些像 Opera 这样的浏览器（我猜是它做了什么，或者是我的 ssl 设置，我不知道) 发送 EOF。即使不是这种情况，您也希望防止这种情况发生，以便您的服务器不会因为 NullPointerException 而崩溃。
To avoid that, just add the null test to your condition, like this:
为避免这种情况，只需将空测试添加到您的条件中，如下所示：
while ((inputLine = in.readLine()) != null && !inputLine.equals(""));
