java JQuery、ajax、端口号
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JQuery, ajax, port number
提问by user2301515
How to get a json from server http://localhost:2323if $.Ajax in jQuery doesn't work. The json is generated width java class:
http://localhost:2323如果 jQuery 中的 $.Ajax 不起作用，如何从服务器获取 json 。json是生成宽度的java类：
public class Main {
public static void main(String[] arr) {
new Main().start();
}
protected void start() {
for (;;) {
try {
Socket remote = new ServerSocket(2323).accept();//port number
BufferedReader in = new BufferedReader(new InputStreamReader(
remote.getInputStream()));
PrintWriter out = new PrintWriter(remote.getOutputStream());
String str = ".";
while (!str.equals(""))
str = in.readLine();
out.println("HTTP/1.0 200 OK");
out.println("Content-Type: text/html");
out.println("Server: Bot");
out.println("");
out.print("{\"a\":\"A\",\"b\":\"asdf\",\"c\":\"J\"}");
out.flush();
remote.close();
} catch (Exception e) {
System.out.println("Error: " + e);
}
}
}
}
that outputs {"a":"A","b":"asdf","c":"J"}. And jquery script is
输出 {"a":"A","b":"asdf","c":"J"}。而 jquery 脚本是
$(document).ready(function() {
$.ajax({
type: 'POST',
dataType: 'json',
url: 'http://localhost:2323',//the problem is here
async: false,
data: {},
success: function(data) {
alert(data.a+' '+data.b+' '+data.c);
}
});
});
if url is http://localhost, then it works, if i append an :portnumber, it doesn't work. How to read from an url:portnumber?
如果 url 是http://localhost，那么它就可以工作，如果我附加一个：端口号，它就不起作用。如何从 url:portnumber 读取？
Thanks
谢谢
回答by Arnthor
Specifying port in ajax calls won't work due to Same origin policy(http://en.wikipedia.org/wiki/Same_origin_policy). Which means that URL must have the same domain and port as the server, where script's hosted.
由于同源策略( http://en.wikipedia.org/wiki/Same_origin_policy)，在 ajax 调用中指定端口将不起作用。这意味着 URL 必须与托管脚本的服务器具有相同的域和端口。
Also, please note that this question was already asked, and is one of the first results when searching in google - Is it possible to specify a port in a ajax call
另外，请注意这个问题已经被问到，并且是在谷歌搜索时的第一个结果之一 -是否可以在 ajax 调用中指定端口
