Javascript Fetch API:标头参数不起作用 [英] Javascript Fetch API: header params not working
问题描述
这是我的示例请求:
var header = new Headers({
'Platform-Version': 1,
'App-Version': 1,
'Platform': 'FrontEnd'
});
var myInit = {
method : 'GET',
headers: header,
mode : 'no-cors',
cache : 'default'
}
fetch('http://localhost:3000/api/front_end/v1/login', myInit)
.then(res => {
console.log(res.text())
})
当我调试时,我看到此请求已成功发送到服务器,但服务器未收到标头参数(在这种情况下是平台版本
, App-版本
和平台
)。请告诉我哪个部分配置错误。
When I debug, I see that this request is sent successfully to server, but server hasn't received header params (in this case is Platform-Version
, App-Version
and Platform
). Please tell me which part do I config wrong.
谢谢
推荐答案
您正确使用它,但您必须告诉您的后端服务允许自定义标头( X -
)。例如,在PHP中:
You are using it correctly, but you have to tell your backend service to allow custom headers (X-
). For example, in PHP:
header("Access-Control-Allow-Headers: X-Requested-With");
此外,您的自定义标头应以 X为前缀 -
。所以你应该:
Also, your custom headers should be prefixed with X-
. So you should have:
'X-Platform-Version': '1'
最后一件事,你的模式
需要 cors
。
And one last thing, your mode
needs to be cors
.
您可以看到使用以下代码发送标准标头。查看网络选项卡以查看标准请求标头。
You can see that standard headers are being sent with the following code. take a look at the network tab to see the standard request headers.
var header = new Headers();
// Your server does not currently allow this one
header.append('X-Platform-Version', 1);
// You will see this one in the log in the network tab
header.append("Content-Type", "text/plain");
var myInit = {
method: 'GET',
headers: header,
mode: 'cors',
cache: 'default'
}
fetch('http://localhost:3000/api/front_end/v1/login', myInit)
.then(res => {
console.log(res.text())
});
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