> For the complete documentation index, see [llms.txt](https://gyx8899.gitbook.io/blog/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gyx8899.gitbook.io/blog/docs/http.md).

# HTTP: 小知识巧总结

## Response status codes

### 分组

* \[1--] *(服务器 - 发) 信息响应 - Informational responses (100–199),*
* \[2--] (客户端 - 收) 成功响应 - Successful responses (200–299),
* \[3--] *(服务器 - 发) 重定向 - Redirects (300–399),*
* \[4--] (客户端 - 收) 客户端错误 - Client errors (400–499),
* \[5--] *(服务器 - 发) 服务器错误 - Server errors (500–599).*

### 常见状态码

| code | key                   | info                                    |
| ---- | --------------------- | --------------------------------------- |
| 200  | OK                    | Get, Put 或 Post 请求响应成功                  |
| 201  | Created               | 标识一个新实例创建成功。请使用 Post 方法创建新实例并返回 201 状态码 |
| 304  | Not Modified          | 发现资源已经缓存到本地，浏览器会自动减少请求次数                |
| 400  | Bad Request           | 请求未被处理，因为服务器不能理解客户端想要什么                 |
| 401  | Unauthorized          | 因为请求缺少有效的凭据，应该使用有效的凭据重新发送请求             |
| 403  | Forbidden             | 服务器理解本次请求，但拒绝授权                         |
| 404  | Not Found             | 未找到请求的资源                                |
| 500  | Internal Server Error | 请求本身有效，但由于意外情况，服务器无法实现，服务器发生了故障         |

### 所有状态码

#### 1xx: 信息响应

| code | key                | info |
| ---- | ------------------ | ---- |
| 100  | Continue           |      |
| 101  | Switching Protocol |      |
| 102  | Processing         |      |
| 103  | Early Hints        | ...  |

#### 2xx: 成功响应

| code | key                           | info |
| ---- | ----------------------------- | ---- |
| 200  | OK                            |      |
| 201  | Created                       |      |
| 202  | Accept                        |      |
| 203  | Non-Authoritative Information |      |
| 204  | No Content                    |      |
| 205  | Reset Content                 |      |
| 206  | Partial Content               | ...  |

#### 3xx: 重定向

| code | key               | info |
| ---- | ----------------- | ---- |
| 300  | Multiple Choice   |      |
| 301  | Moved Permanently |      |
| 302  | Found             |      |
| 303  | See Other         |      |
| 304  | Not Modified      | ...  |

#### 4xx: 客户端错误

| code | key                             | info |
| ---- | ------------------------------- | ---- |
| 400  | Bad Request                     |      |
| 401  | Unauthorized                    |      |
| 402  | Payment Required                |      |
| 403  | Forbidden                       |      |
| 404  | Not Found                       |      |
| 405  | Method Not Allowed              |      |
| 406  | Not Acceptable                  |      |
| 407  | Proxy Authentication Required   |      |
| 408  | Request Timeout                 |      |
| 409  | Conflict                        |      |
| 410  | Gone                            |      |
| 411  | Length Required                 |      |
| ...  | ...                             |      |
| 431  | Request Header Fields Too Large |      |
| ...  | ...                             |      |
| 451  | Unavailable For Legal Reasons   | ...  |

#### 5xx: 服务器错误

| code | key                             | info |
| ---- | ------------------------------- | ---- |
| 500  | Internal Server Error           |      |
| 501  | Not Implemented                 |      |
| 502  | Bad Gateway                     |      |
| 503  | Service Unavailable             |      |
| 504  | Gateway Timeout                 |      |
| 505  | HTTP Version Not Supported      |      |
| 506  | Variant Also Negotiates         |      |
| 507  | Insufficient Storage            |      |
| 508  | Loop Detected                   |      |
| 510  | Not Extended                    |      |
| 511  | Network Authentication Required | ...  |

## 鉴权方式

* HTTP Basic Authentication
* session-cookie
* token
* OAuth

## 参考

[HTTP 响应代码 - HTTP | MDN](https://developer.mozilla.org/zh-CN/docs/Web/HTTP/Status)