使用JAVA套接字服务器读取AJAX发布内容

Question

I set up a JAVA socket server that is able to get everything from a html < form >. 我设置了一个JAVA套接字服务器，该服务器能够从html <form>获取所有内容。 But when it comes to AJAX post, the server can only get the POST event, but it cannot read the "data" inside AJAX post. 但是当涉及到AJAX发布时，服务器只能获取POST事件，但不能读取AJAX发布中的“数据”。 The following is the html code: 以下是html代码：

HTML HTML

<!DOCTYPE html>
<head>
<meta charset="utf-8" />
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js">
</script>

<script type="text/javascript">
$(document).ready(function() {
     $('#submit').click(function() {
//information to be sent to the server

info = $('#foo').val();
$.ajax({
  type: "POST",
  url: 'http://10.0.0.3:8888',
  data: ({foo: info}),
  //crossDomain: true,
  dataType: 'json'
});

return false;       
});

});
</script>

</head>
<body>

<label>Text</label>
<textarea id="foo"></textarea>

<button id="submit">Submit via Ajax</button>

</body>
</html>

I have no idea why this is happening, any suggestion? 我不知道为什么会这样，有什么建议吗？

Thank you 谢谢

--------------------------------------------------------------------------------------------- -------------------------------------------------- -------------------------------------------

Update 更新

Java Server Code Java服务器代码

    ServerSocket ss = new ServerSocket(8888);
    Socket s = ss.accept();

    BufferedReader in = new BufferedReader(new InputStreamReader(s.getInputStream()));

    String inputLine;
    while (!(inputLine = in.readLine()).equals(""))
        System.out.println(inputLine);

    PrintWriter pw = new PrintWriter(s.getOutputStream(),true);
    pw.println("aa");

    s.close();
    ss.close();

What I got at server is like: 我在服务器上得到的是：

POST / HTTP/1.1
Host: 10.109.3.184:8888
Connection: keep-alive
Content-Length: 58
Accept: */*
Origin: xxxxxxxxxxxxxxxxxx
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Referer: xxxxxxxxxxxxxxxxxx
Accept-Encoding: gzip,deflate,sdch
Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.6,en;q=0.4

The content does not appear... 内容没有出现...

Answer 1

POST data in HTTP request come as a request body, which is separated from head by empty line like this: HTTP请求中的POST数据作为请求正文出现，该请求正文以空行与head分开，如下所示：

POST / HTTP/1.1
Host: 10.0.1.1:80
Connection: keep-alive
Content-Length: 29
Content-Type: text/json

{"id":123,"name":"something"}

So your server code should (more or less ) ;-) look like this: 因此，您的服务器代码应该（ 或多或少 ）;-)如下所示：

BufferedReader in = new BufferedReader(new InputStreamReader(s.getInputStream()));

String line;
List<String> headers = new LinkedList<>();
StringBuilder body = null;
while ((line = in.readLine()) != null) {
    //- Here we test if we've reach the body part.
    if (line.isEmpty() && body == null) {
        body = new StringBuilder();
        continue;
    }
    if (body != null) {
        body.append(line).append('\n');
    }
    else {
        headers.add(line);
    }
}

System.out.println("--- Headers ---");
for (String h : headers) {
    System.out.println(h);
}
System.out.println("--- Body ---");
System.out.println(body != null ? body.toString() : "");

Please note, that this code is only for test purposes. 请注意，该代码仅用于测试目的。 You can not assume, that body is a text (at least you should verify Content-Type header) and you can safely read it into StringBuilder or if it is safe at all to load it in whole into memory (at least you should verify Content-Length header). 您不能假设该正文是文本（至少您应该验证Content-Type标头），并且可以安全地将其读取到StringBuilder中，或者可以完全将其整体加载到内存中（至少应该验证Content） -长度标头）。 Despite of those headers you should expect the worst and during reading perform some sanity checks. 尽管有这些标头，但您应该预料到最坏的情况，并且在阅读过程中会执行一些健全性检查。

使用JAVA套接字服务器读取AJAX发布内容

问题描述

1 个解决方案

解决方案1
1 已采纳 2014-02-07 06:15:25

使用JAVA套接字服务器读取AJAX发布内容

问题描述

1 个解决方案

解决方案1 1 已采纳 2014-02-07 06:15:25

解决方案1
1 已采纳 2014-02-07 06:15:25