Node.js - Javascript - HTML - XMLHttpRequest 无法加载
基本上我在一个node.js和1个javascript/html下面发布了2个脚本
我正在将数据发布到我的node.js 文件，但我收到此错误，并且无法在我的html 页面上看到nodes.js 的结果。
XMLHttpRequest cannot load http://192.168.2.109:8111/?name=nknk. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://192.168.2.109:8111' is therefore not allowed access
这是我的 Node.js 文件:
var url = require('url');
var http = require('http');
var server = http.createServer(function (request, response) {
var queryData = url.parse(request.url, true).query;
response.writeHead(200, {"Content-Type": "text/plain"});
if (queryData.name) {
var basevalue = queryData.name;
var value = basevalue.split (":");
var exec = require('child_process').exec;
console.log(value[0]);
console.log(value[1]);
exec ("casperjs test.js " + value[0] + " " + value[1] + '\n',function(err, stdout, stderr) {
response.end(stdout);
});
} else {
response.end("Contact Admin - Not Working\n");
}
});
server.listen(1234);
这是我的 html/javascript:
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<html><head><title>Welcome To ....</title>
<script type="text/javascript">
function textareaToArray(t){
return t.value.split(/[\n\r]+/);
}
function showArray(msg){
for(i = 0; i < msg.length; i++) {
// something per item
var data = {}; //your own data
$.post("http://192.168.2.109:8111" + "?" + $.param({name: msg[i]}), data);
}
// the old code
document.getElementById("message").innerHTML = msg.join("
");
}
</script>
</head>
<body>
<h1> WELCOME TO .... </h1>
<form>
<textarea rows="10" cols="60" name="alpha"></textarea>
<br>
<input type="button" value="show array" onclick="showArray(textareaToArray(this.form.alpha ))">
</form>
<br>
<textarea id="message" rows="6" cols="60" name="message"></textarea>
</body></html>
有人可以帮我解决这个问题，以便我可以将结果返回到我的 html 而不会出现此错误
----edit
这是我正在尝试的代码，我仍然看不到来自node.js服务器的响应数据 我需要查看我的 Node 服务器运行的 exec 命令的响应我知道这需要大约 40 秒才能完成，但我仍然没有看到任何输出到 html 的内容
Node .js
var url = require('url')
var http = require('http')
var server = http.createServer(function (request, response) {
var queryData = url.parse(request.url, true).query;
response.writeHead(200, {"Content-Type": "text/plain"});
if (queryData.name) {
// user told us their name in the GET request, ex: http://host:8000/?name=Tom
var basevalue = queryData.name;
var value = basevalue.split (":");
console.log(value[0]);
console.log(value[1]);
var exec = require('child_process').exec;
exec ("casperjs test.js " + value[0] + " " + value[1] + '\n',function(err, stdout, stderr) {
response.end('_stdout(\'{"content": "blablabla"}\')');
});
} else {
response.end("Contact Admin - Not Working\n");
}
});
// Listen on port 8000, IP defaults to 127.0.0.1
server.listen(8999);
~
javascript html
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<html><head><title>Welcome To ....</title>
<script type="text/javascript">
function textareaToArray(t){
return t.value.split(/[\n\r]+/);
}
function showArray(msg){
for(i = 0; i < msg.length; i++) {
// something per item
// var data = {}; //your own data
//$.post("http://192.168.2.109:8121" + "?" + $.param({name: msg[i]}), data);
$.ajax({
url: 'http://192.168.2.109:8999' + '?' + $.param({name: msg[i]}),
dataType: "jsonp",
jsonpCallback: "_stdout",
cache: false,
timeout: 5000,
success: function(data) {
function doSomethingWithData(data) { $('#message').val(data.content); }
},
error: function(jqXHR, textStatus, errorThrown) {
handleError(data);
}
});
}
// the old code
document.getElementById("message").innerHTML = msg.join("
");
}
</script>
</head>
<body>
<h1> WELCOME TO .... </h1>
<form>
<textarea rows="10" cols="60" name="alpha"></textarea>
<br>
<input type="button" value="show array" onclick="showArray(textareaToArray(this.form.alpha ))">
</form>
<br>
<textarea id="message" rows="6" cols="60" name="message"></textarea>
</body></html>
最佳答案
显然，您的 Web 应用程序与您的 Nodejs 服务器没有托管在同一主机上，因此，您违反了 same origin policy .
您可以使用 JSONP:
var http = require('http');
http.createServer(function (req, res) {
console.log('request received');
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('_stdout(\'{"content": "blablabla"}\')');
}).listen(1234);
您的电话:
$.ajax({
url: 'http://192.168.2.109:8111' + '?' + $.param({name: msg[i]}),
dataType: "jsonp",
jsonpCallback: "_stdout",
cache: false,
timeout: 5000,
success: function(data) {
doSomethingWithData(data);
},
error: function(jqXHR, textStatus, errorThrown) {
handleError(data);
}
});
关于javascript - Node.js - JavaScript - HTML - XMLHttpRequest 无法加载，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21839156/