HTTP从本地服务器请求数据
[英]HTTP Requesting data from a local server
问题描述
I'm running two Flask Apps on my local machine. 
我在本地计算机上运行两个Flask Apps。
1) My test client website (on port 5001) 1）我的测试客户网站（在端口5001上）
2) My API (on port 5000) 2）我的API（在端口5000上）
If I type 127.0.0.1:5000/search/ into my browser, I get the following: 如果在浏览器中键入127.0.0.1:5000/search/得到以下信息：
Test Hello World
If I type 127.0.0.1:5001 into my browser I get an ordinary web page containing the following HTML code (this all looks OK): 如果我在浏览器中键入127.0.0.1:5001我会得到一个包含以下HTML代码的普通网页（一切看起来都不错）：
<!DOCTYPE html>
<html>
<body>
<button type="button" onclick="loadDoc()">Request data</button>
<p id="demo">TEST</p>
<script>
function loadDoc() {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (xhttp.readyState == 4 && xhttp.status == 200) {
document.getElementById("demo").innerHTML = xhttp.responseText;
}
};
xhttp.open("GET", "127.0.0.1:5000/search/", true);
xhttp.send();
}
</script>
</body>
</html>
As you can see the HTTP request is sent to 127.0.0.1:5000/search/ which is tested and working in the browser and should return Test Hello World but unfortunately nothing happens. 如您所见，HTTP请求已发送到127.0.0.1:5000/search/ ，该请求已在浏览器中经过测试并且可以正常工作，并且应返回Test Hello World但不幸的是没有任何反应。
Basically, I click the "Request Data" button (see above), and absolutely nothing happens. 基本上，我单击“请求数据”按钮（请参见上文），并且绝对没有任何反应。
Any ideas why? 有什么想法吗？ I've been stuck on this for hours. 我已经坚持了几个小时。
2 个解决方案
解决方案1
2 已采纳 2016-05-31 15:34:59
For security reasons, browsers restrict cross-origin HTTP requests initiated from within scripts.
These resources may be helpful; 这些资源可能会有所帮助；
HTTP access control (CORS) HTTP访问控制（CORS）
Using CORS 使用CORS
解决方案2
0 2016-05-31 15:38:19
"127.0.0.1:5000/search/"
Your URL is missing its scheme. 您的网址缺少其方案。 You need to prefix that with http:// . 您需要在其前面加上http:// 。
If you open your browser's developer tools and look at the Network tab, you should see a 404 error listed there. 如果打开浏览器的开发人员工具并查看“网络”选项卡，则应该在其中看到404错误。
Once you fix that, it is likely that you'll have a Cross Origin error as described in this question 解决此问题后，很可能会出现如本问题所述的跨源错误
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