WebKit “拒绝设置不安全的标头‘内容长度’&qu

时间：2023-10-15

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问题描述

我正在尝试实现简单的 xhr 抽象，并在尝试为 POST 设置标头时收到此警告.我认为这可能与在单独的 js 文件中设置标题有关，因为当我在 .html 文件的 <script> 标记中设置它们时，它工作正常.POST 请求工作正常，但我收到此警告，我很好奇为什么.对于 content-length 和 connection 标头，我都会收到此警告，但仅限于 WebKit 浏览器(Chrome 5 beta 和 Safari 4).在 Firefox 中，我没有收到任何警告，Content-Length 标头设置为正确的值，但 Connection 设置为 keep-alive 而不是 close，这让我认为它也忽略了我的 setRequestHeader 调用并生成它自己的.我没有在 IE 中尝试过这段代码.这是标记和代码:

I am trying to implement simple xhr abstraction, and am getting this warning when trying to set the headers for a POST. I think it might have something to do with setting the headers in a separate js file, because when i set them in the <script> tag in the .html file, it worked fine. The POST request is working fine, but I get this warning, and am curious why. I get this warning for both content-length and connection headers, but only in WebKit browsers (Chrome 5 beta and Safari 4). In Firefox, I don't get any warnings, the Content-Length header is set to the correct value, but the Connection is set to keep-alive instead of close, which makes me think that it is also ignoring my setRequestHeader calls and generating it's own. I have not tried this code in IE. Here is the markup & code:

test.html:

<!DOCTYPE html>
<html>
    <head>
        <script src="jsfile.js"></script>
        <script>
            var request = new Xhr('POST', 'script.php', true, 'data=somedata',  function(data) { 
                console.log(data.text); 
            });
        </script>
    </head>
    <body>
    </body>
</html>

jsfile.js:

function Xhr(method, url, async, data, callback) {
    var x;
    if(window.XMLHttpRequest) {
        x = new XMLHttpRequest();

        x.open(method, url, async);

        x.onreadystatechange = function() {
            if(x.readyState === 4) {
                if(x.status === 200) {
                    var data = {
                        text: x.responseText,
                        xml: x.responseXML
                    };
                    callback.call(this, data);
                }
            }
        }

        if(method.toLowerCase() === "post") {
            x.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
            x.setRequestHeader("Content-Length", data.length);
            x.setRequestHeader("Connection", "close");
        }

        x.send(data);
    } else {
        // ... implement IE code here ...
    }
    return x;
}

WebKit “拒绝设置不安全的标头‘内容长度’&qu

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