Post 带卷曲的数据，没有 Content-Type header
Post data with curl with no Content-Type header
如果我这样做
curl -v --data "hello" example.com
curl 发送
POST / HTTP/1.1
Host: example.com
User-Agent: curl/7.77.0
Accept: */*
Content-Length: 5
Content-Type: application/x-www-form-urlencoded
hello
我知道我可以通过 -X 'Content-Type: something/else 来更改 Content-Type header 的值，但是有没有办法在不设置 header 的情况下发送数据完全没有？
要告诉 curl 根本不发送 header，请使用 -H 传递没有值的 header，如下所示（引号不是绝对必要的）：
curl --data hello -H 'Content-Type:' example.com
这将发送此请求：
POST / HTTP/1.1
Host: example.com
User-Agent: curl/7.77.0
Accept: */*
Content-Length: 5
hello
来自curl man page for the -H flag：
Remove an internal header by giving a replacement without content on the right side of the colon, as in: -H "Host:". If you send the custom header with no-value then its header must be terminated with a semicolon, such as -H "X-Custom-Header;" to send "X-Custom-Header:".
如果我这样做
curl -v --data "hello" example.com
curl 发送
POST / HTTP/1.1
Host: example.com
User-Agent: curl/7.77.0
Accept: */*
Content-Length: 5
Content-Type: application/x-www-form-urlencoded
hello
我知道我可以通过 -X 'Content-Type: something/else 来更改 Content-Type header 的值，但是有没有办法在不设置 header 的情况下发送数据完全没有？
要告诉 curl 根本不发送 header，请使用 -H 传递没有值的 header，如下所示（引号不是绝对必要的）：
curl --data hello -H 'Content-Type:' example.com
这将发送此请求：
POST / HTTP/1.1
Host: example.com
User-Agent: curl/7.77.0
Accept: */*
Content-Length: 5
hello
来自curl man page for the -H flag：
Remove an internal header by giving a replacement without content on the right side of the colon, as in:
-H "Host:". If you send the custom header with no-value then its header must be terminated with a semicolon, such as-H "X-Custom-Header;"to send "X-Custom-Header:".