408 Request Timeout

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状态
规范
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响应状态码 408 Request Timeout r表示服务器想要将没有在使用的连接关闭。一些服务器会在空闲连接上发送此信息，即便是在客户端没有发送任何请求的情况下。

服务器应该在此类响应中将 Connection 首部的值设置为 "close"，因为 408 意味着服务器已经决定将连接关闭，而不是继续等待。

这类响应出现的比较频繁，源于一些浏览器——例如 Chrome, Firefox 27+, 或者 IE9 等——使用 HTTP 协议中的预连接机制来加速上网体验。同时应该注意到，某些服务器会直接关闭连接，而不发送此类消息。

状态

408 Request Timeout

规范

Specification	Title
RFC 7231, section 6.5.7: 408 Request Timeout	Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content

文档标签和贡献者

另见

HTTP
Guides:
Resources and URIs
1. Identifying resources on the Web
2. Data URIs
3. Introduction to MIME Types
4. Complete list of MIME Types
5. Choosing between www and non-www URLs
Basics of HTTP
1. Overview of HTTP
2. Evolution of HTTP
3. HTTP Messages
4. A typical HTTP session
5. Connection management in HTTP/1.x
HTTP security
1. Content Security Policy (CSP)
2. HTTP Public Key Pinning (HPKP)
3. HTTP Strict Transport Security (HSTS)
4. Cookie security
5. X-Content-Type-Options
6. X-Frame-Options
7. X-XSS-Protection
8. Mozilla web security guidelines
9. Mozilla Observatory
HTTP access control (CORS)
HTTP authentication
HTTP caching
HTTP compression
HTTP conditional requests
HTTP content negotiation
HTTP cookies
HTTP range requests
HTTP redirects
HTTP specifications
References:
HTTP headers
1. Accept
2. Accept-Charset
3. Accept-Encoding
4. Accept-Language
5. Accept-Ranges
6. Access-Control-Allow-Credentials
7. Access-Control-Allow-Headers
8. Access-Control-Allow-Methods
9. Access-Control-Allow-Origin
10. Access-Control-Expose-Headers
11. Access-Control-Max-Age
12. Access-Control-Request-Headers
13. Access-Control-Request-Method
14. Age
15. Allow
16. Authorization
17. Cache-Control
18. Connection
19. Content-Disposition
20. Content-Encoding
21. Content-Language
22. Content-Length
23. Content-Location
24. Content-Range
25. Content-Security-Policy
26. Content-Security-Policy-Report-Only [我来译!]
27. Content-Type
28. Cookie
29. Cookie2
30. DNT
31. Date
32. ETag
33. Expect
34. Expires
35. Forwarded
36. From
37. Host
38. If-Match
39. If-Modified-Since
40. If-None-Match
41. If-Range
42. If-Unmodified-Since
43. Keep-Alive
44. Large-Allocation [我来译!]
45. Last-Modified
46. Location
47. Origin
48. Pragma
49. Proxy-Authenticate
50. Proxy-Authorization
51. Public-Key-Pins
52. Public-Key-Pins-Report-Only [我来译!]
53. Range
54. Referer
55. Referrer-Policy
56. Retry-After
57. Server
58. Set-Cookie
59. Set-Cookie2
60. SourceMap [我来译!]
61. HTTP Strict Transport Security
62. TE
63. Tk [我来译!]
64. Trailer
65. Transfer-Encoding
66. Upgrade-Insecure-Requests
67. User-Agent
68. Vary
69. Via
70. WWW-Authenticate
71. Warning
72. X-Content-Type-Options
73. DNS 预读取
74. X-Forwarded-For
75. X-Forwarded-Host
76. X-Forwarded-Proto
77. X-Frame-Options 响应头
78. X-XSS-Protection
HTTP request methods
1. CONNECT
2. DELETE
3. GET
4. HEAD
5. OPTIONS
6. PATCH
7. POST
8. PUT
HTTP response status codes
1. 100 Continue
2. 101 Switching Protocol
3. 200 OK
4. 201 Created
5. 202 Accepted
6. 203 Non-Authoritative Information
7. 204 No Content
8. 205 Reset Content
9. 206 Partial Content
10. 300 Multiple Choices
11. 301 Moved Permanently
12. 302 Found
13. 303 See Other
14. 304 Not Modified
15. 307 Temporary Redirect
16. 308 Permanent Redirect
17. 400 Bad Request
18. 401 Unauthorized
19. 403 Forbidden
20. 404 Not Found
21. 405 Method Not Allowed
22. 406 Not Acceptable
23. 407 Proxy Authentication Required
24. 408 Request Timeout
25. 409 Conflict
26. 410 Gone
27. 411 Length Required
28. 412 Precondition Failed（先决条件失败）
29. 413 Payload Too Large
30. 414 URI Too Long [我来译!]
31. 415 Unsupported Media Type [我来译!]
32. 416 Range Not Satisfiable
33. 417 Expectation Failed
34. 426 Upgrade Required [我来译!]
35. 428 Precondition Required
36. 429 Too Many Requests
37. 431 Request Header Fields Too Large [我来译!]
38. 451 Unavailable For Legal Reasons [我来译!]
39. 500 内部服务器错误
40. 501 Not Implemented
41. 502 Bad Gateway [我来译!]
42. 503 Service Unavailable [我来译!]
43. 504 Gateway Timeout [我来译!]
44. 505 HTTP Version Not Supported [我来译!]
45. 511 Network Authentication Required [我来译!]
CSP directives
1. CSP: base-uri [我来译!]
2. CSP: block-all-mixed-content [我来译!]
3. CSP: child-src [我来译!]
4. CSP: connect-src [我来译!]
5. CSP: default-src [我来译!]
6. CSP: font-src [我来译!]
7. CSP: form-action [我来译!]
8. CSP: frame-ancestors [我来译!]
9. CSP: frame-src [我来译!]
10. CSP: img-src [我来译!]
11. CSP: manifest-src [我来译!]
12. CSP: media-src [我来译!]
13. CSP: object-src [我来译!]
14. CSP: plugin-types [我来译!]
15. CSP: referrer [我来译!]
16. CSP: report-uri [我来译!]
17. CSP: require-sri-for [我来译!]
18. CSP: sandbox [我来译!]
19. CSP: script-src [我来译!]
20. CSP: style-src [我来译!]
21. CSP: upgrade-insecure-requests [我来译!]
22. CSP: worker-src [我来译!]

408 Request Timeout

状态

规范

相关内容

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