Question

我刚刚开始使用ajax并遵循一些教程，我在尝试运行此html文件和链接的JavaScript文件时遇到此错误，

我知道浏览器无法发出文件请求//所以我启动了正在侦听端口8080并给出该文件地址的http-server。这是我的javascript文件中的代码：

它只是一个简单的ajax请求和响应模型

print

HTML文件：

function test() {
if (window.XMLHttpRequest) {
    //when request is made you wanna do it with XMLHttpRequest method!
    httpRequest = new XMLHttpRequest();
    console.log('xmlhhtprequest object was created')
} else if (window.ActiveXObject) {
    httpRequest = new ActiveXObject('Microsoft.XMLHTTP');
    console.log('activex object was created')
}

    //checking if request was successful
if (httpRequest.status === 200) {
        console.log('request was successful')
} else {
     console.log('request was unsuccesful')
}

//when response is recieved 
httpRequest.onreadystatechange = function () {
    //checking for response is recieved
    if (httpRequest.readystate === XMLHttpRequest.DONE) {
        document.getElementById('result').innerHTML 
 =    httpRequest.responseText;

    } else {
          console.log('Error Occured')
    }
}

//actually making request 
httpRequest.open('GET', 'http://192.168.43.227:8080/Desktop/
simpleserver/test.txt', true);

httpRequest.send();
}

Answer 1

由于其跨源访问错误，Chrome中提供的插件很少，无法提出跨域请求，最好是 Chrome CORS 插件。然后在命令行中使用以下命令禁用chrome中的跨域访问安全性。在命令提示符下运行以下命令。

start chrome --args --disable-web-security --user-data-dir

确保在运行此命令之前关闭所有chrome实例。成功运行后，您将在Chrome浏览器下看到黄色条带。

Ajax：请求的资源上没有“Access-Control-Allow-Origin”标头。因此不允许原点'null'访问

1 个答案: