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1404是一个HTTP状态码，表示请求的资源无法找到。
1404是一个HTTP状态码，表示请求的资源无法找到，它通常出现在客户端尝试访问一个不存在的网页或资源时，HTTP状态码是由3位数字组成，其中第一位数字表示响应的类型，第二位和第三位数字表示具体的状态码。
| 状态码 | 描述 |
| 1 | 信息响应（Informational） |
| 2 | 成功（Successful） |
| 3 | 重定向（Redirection） |
| 4 | 客户端错误（Client Error） |
| 5 | 服务器错误（Server Error） |
| 1xx | 临时响应（Temporary Response） |
| 2xx | 成功（Successful） |
| 3xx | 重定向（Redirection） |
| 4xx | 客户端错误（Client Error） |
| 5xx | 服务器错误（Server Error） |
| 100 | Continue |
| 101 | Switching Protocols |
| 102 | Processing |
| 200 | OK |
| 201 | Created |
| 202 | Accepted |
| 203 | NonAuthoritative Information |
| 204 | No Content |
| 205 | Reset Content |
| 206 | Partial Content |
| 207 | MultiStatus |
| 208 | Already Reported |
| 226 | IM Used |
| 300 | Multiple Choices |
| 301 | Moved Permanently |
| 302 | Found |
| 303 | See Other |
| 304 | Not Modified |
| 305 | Use Proxy |
| 307 | Temporary Redirect |
| 308 | Permanent Redirect |
| 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 |
| 412 | Precondition Failed |
| 413 | Payload Too Large |
| 414 | URI Too Long |
| 415 | Unsupported Media Type |
| 416 | Range Not Satisfiable |
| 417 | Expectation Failed |
| 418 | I'm a teapot |
| 421 | Misdirected Request |
| 422 | Unprocessable Entity |
| 423 | Locked |
| 424 | Failed Dependency |
| 425 | Too Early |
| 426 | Upgrade Required |
| 428 | Precondition Required |
| 429 | Too Many Requests |
| 431 | Request Header Fields Too Large |
| 451 | Unavailable For Legal Reasons |
| 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 |
| 599 | Network Connect Timeout
