发送带有标头和FormData的XMLHttpRequest [英] Send XMLHttpRequest with both Header and FormData
本文介绍了发送带有标头和FormData的XMLHttpRequest的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试发送带有标头的XMLHttpRequest并添加FormData.有没有一种(优雅的)方式我可以做这样的事情:
I am trying to send a XMLHttpRequest with a header and add a FormData. Is there an (elegant) way i can do something like this:
var formData = new FormData();
formData.append("file", file);
var xhr = new XMLHttpRequest();
xhr.open("POST", "/ajax_gateway.php?mod=fileupload", true);
xhr.setRequestHeader("Content-type","application/x-www-form-urlencoded")
xhr.send(formData, "token=add");
推荐答案
发送FormData
时不能指定Content-Type
头,因为浏览器会自动将该头设置为"multipart/form-data"
.您也可以设置其他标题,请尝试以下操作:
You cannot specify the Content-Type
header when sending FormData
because that header automatically gets set to "multipart/form-data"
by the browser. You can set other headers though, try this:
var formData = new FormData();
formData.append("file", file);
formData.append("mod", "fileupload");
formData.append("token", "add");
var xhr = new XMLHttpRequest();
xhr.open("POST", "/ajax_gateway.php");
xhr.setRequestHeader("X-Answer", "42");
xhr.send(formData);
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