HTTP 头部信息是 HTTP 请求和响应中非常重要的部分，它包含了关于请求或响应的元数据。以下是一些常见的 HTTP 头部信息及其用途：

常见 HTTP 头部信息

  • Content-Type: 指示响应的内容类型，例如 text/html 或 application/json。
  • Content-Length: 响应体的长度，以字节为单位。
  • Connection: 控制是否保持连接，例如 keep-alive 表示保持连接。
  • Cache-Control: 控制缓存行为，例如 no-cache 表示不缓存。
  • Date: 响应日期和时间。

例子

假设我们有一个 API 端点 /api/guides/http-headers，以下是一个 GET 请求的示例：

GET /api/guides/http-headers HTTP/1.1
Host: example.com

图片示例

HTTP 头部信息

扩展阅读

想要了解更多关于 HTTP 头部信息的内容，可以阅读本站的HTTP 基础教程。

# HTTP Headers Guide

HTTP headers are an essential part of HTTP requests and responses, containing metadata about the request or response. Below are some common HTTP headers and their purposes:

### Common HTTP Headers

- **Content-Type**: Indicates the type of the response content, such as `text/html` or `application/json`.
- **Content-Length**: The length of the response body in bytes.
- **Connection**: Controls whether to keep the connection, such as `keep-alive` indicating to keep the connection.
- **Cache-Control**: Controls caching behavior, such as `no-cache` indicating not to cache.
- **Date**: The date and time of the response.

### Example

Suppose we have an API endpoint `/api/guides/http-headers`. Here is an example of a GET request:

```http
GET /api/guides/http-headers HTTP/1.1
Host: example.com

Image Example

HTTP Headers Information

Further Reading

For more information about HTTP headers, you can read our HTTP Basics Tutorial.