HTTP in depth

https://developer.mozilla.org/en-US/docs/Web/HTTP

https://developer.mozilla.org/en-US/docs/Web/HTTP/Status

HTTP response status codes

Responses are grouped in five classes:

  1. Informational responses (100–199)
  2. Successful responses (200–299)
  3. Redirects (300–399)
  4. Client errors (400–499)
  5. Server errors (500–599)

常见 HTTP 状态吗

1xx?

200

301

302

304 重定向

403

404 请求的方法不存在

405 请求的方法不允许

500 服务端错误

502

504

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