Content-Length
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
HTTP Content-Length 标头表示发送给接收方的消息体的大小（以字节为单位）。
| 标头类型 | 请求标头、响应标头、内容标头 |
|---|---|
| 禁止修改的标头 | 是 |
| 列入 CORS 白名单的响应标头 | 是 |
语法
http
Content-Length: <length>
指令
<length>-
以字节为单位的长度。
规范
| Specification |
|---|
| HTTP Semantics # field.content-length |
浏览器兼容性
BCD tables only load in the browser