id stringlengths 16 145 | text stringlengths 1 179k | title stringclasses 1
value |
|---|---|---|
Mmdn_HTTP/HTTP_response_status_28_3.txt | ders/RTT) Experimental
84. [ ` Save-Data ` ](/en-US/docs/Web/HTTP/Headers/Save-Data) Experimental
85. [ ` Sec-Browsing-Topics ` ](/en-US/docs/Web/HTTP/Headers/Sec-Browsing-Topics) Experimental Non-standard
86. [ ` Sec-CH-Prefers-Color-Scheme ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Color-Scheme) ... | |
Mmdn_HTTP/HTTP_response_status_39_0.txt | * Skip to main content
* Skip to search
* Skip to select language
[ MDN Web Docs ](/en-US/) Open main menu
* References [ References ](/en-US/docs/Web)
* [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web)
* [ HTML Structure of content on the web ](/en-US/do... | |
Mmdn_HTTP/HTTP_response_status_32_8.txt | Retry-After ` ](/en-US/docs/Web/HTTP/Headers/Retry-After)
* [ HTTP Status Code Definitions ](https://httpwg.org/specs/rfc9110.html#status.429)
* Python solution: [ How to avoid HTTP error 429 python ](https://stackoverflow.com/questions/22786068/how-to-avoid-http-error-429-too-many-requests-python)
## Help improv... | |
Mmdn_HTTP/HTTP_headers_37_9.txt |
Deprecated
]: Deprecated. Not for use in new websites.
*[
Experimental
]: Experimental. Expect behavior to change in the future.
| |
Mmdn_HTTP/HTTP_response_status_26_5.txt | 40. [ ` 418 I'm a teapot ` ](/en-US/docs/Web/HTTP/Status/418)
41. [ ` 421 Misdirected Request ` ](/en-US/docs/Web/HTTP/Status/421)
42. [ ` 422 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422)
43. [ ` 423 Locked ` ](/en-US/docs/Web/HTTP/Status/423)
44. [ ` 424 Failed Dependency ` ](/en-US/d... | |
Mmdn_HTTP/HTTP_headers_7_6.txt | ontent-Security-Policy/script-src)
24. [ ` CSP: script-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-attr)
25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem)
26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Sec... | |
Mmdn_HTTP/HTTP_response_status_6_2.txt | Content-Security-Policy-Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only)
36. [ ` Content-Type ` ](/en-US/docs/Web/HTTP/Headers/Content-Type)
37. [ ` Cookie ` ](/en-US/docs/Web/HTTP/Headers/Cookie)
38. [ ` Critical-CH ` ](/en-US/docs/Web/HTTP/Headers/Critical-CH) Experimental... | |
Mmdn_HTTP/HTTP_headers_23_1.txt | -Options ](/en-US/docs/Web/HTTP/Headers/X-Frame-Options)
5. [ X-XSS-Protection ](/en-US/docs/Web/HTTP/Headers/X-XSS-Protection)
6. [ Mozilla web security guidelines ](https://wiki.mozilla.org/Security/Guidelines/Web_Security)
7. [ Mozilla Observatory ](https://observatory.mozilla.org/)
6. [ HTTP access co... | |
Mmdn_HTTP/HTTP_headers_34_5.txt | us/415)
38. [ ` 416 Range Not Satisfiable ` ](/en-US/docs/Web/HTTP/Status/416)
39. [ ` 417 Expectation Failed ` ](/en-US/docs/Web/HTTP/Status/417)
40. [ ` 418 I'm a teapot ` ](/en-US/docs/Web/HTTP/Status/418)
41. [ ` 421 Misdirected Request ` ](/en-US/docs/Web/HTTP/Status/421)
42. [ ` 422 Unprocessa... | |
Mmdn_HTTP/Permissions_Policy_directives_8_2.txt | Security-Policy-Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only)
36. [ ` Content-Type ` ](/en-US/docs/Web/HTTP/Headers/Content-Type)
37. [ ` Cookie ` ](/en-US/docs/Web/HTTP/Headers/Cookie)
38. [ ` Critical-CH ` ](/en-US/docs/Web/HTTP/Headers/Critical-CH) Experimental
39... | |
Mmdn_HTTP/Header_Field_Definitions_22_1.txt | t as if the invalid Range header field did
not exist. (Normally, this means return a 200 response containing the full
entity).
If the server receives a request (other than one including an If- Range
request-header field) with an unsatisfiable Range request- header field (that
is, all of whose byte-range-spec values ha... | |
Mmdn_HTTP/HTTP_request_methods_3_5.txt | [ ` 417 Expectation Failed ` ](/en-US/docs/Web/HTTP/Status/417)
40. [ ` 418 I'm a teapot ` ](/en-US/docs/Web/HTTP/Status/418)
41. [ ` 421 Misdirected Request ` ](/en-US/docs/Web/HTTP/Status/421)
42. [ ` 422 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422)
43. [ ` 423 Locked ` ](/en-US/docs/Web... | |
Mmdn_HTTP/CSP_directives_10_9.txt | s)
## Our communities
* [ MDN Community ](/en-US/community)
* [ MDN Forum ](https://discourse.mozilla.org/c/mdn/236)
* [ MDN Chat ](/discord)
## Developers
* [ Web Technologies ](/en-US/docs/Web)
* [ Learn Web Development ](/en-US/docs/Learn)
* [ MDN Plus ](/en-US/plus)
* [ Hacks Blog ](https://hack... | |
Mmdn_HTTP/HTTP_response_status_35_6.txt | ent-Security-Policy/script-src)
24. [ ` CSP: script-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-attr)
25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem)
26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Securi... | |
Mmdn_HTTP/Permissions_Policy_directives_32_4.txt | /docs/Web/HTTP/Headers/X-DNS-Prefetch-Control) Non-standard
133. [ ` X-Forwarded-For ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-For) Non-standard
134. [ ` X-Forwarded-Host ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-Host) Non-standard
135. [ ` X-Forwarded-Proto ` ](/en-US/docs/Web/HTTP/Headers/X-Forwa... | |
Mmdn_HTTP/Header_Field_Definitions_10_0.txt | ### 14.9.1 What is Cacheable
By default, a response is cacheable if the requirements of the request method,
request header fields, and the response status indicate that it is cacheable.
Section [ 13.4 ](rfc2616-sec13.html#sec13.4) summarizes these defaults for
cacheability. The following Cache-Control response direc... | |
Mmdn_HTTP/HTTP_headers_5_2.txt | 31. [ ` Content-Length ` ](/en-US/docs/Web/HTTP/Headers/Content-Length)
32. [ ` Content-Location ` ](/en-US/docs/Web/HTTP/Headers/Content-Location)
33. [ ` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range)
34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy)... | |
Mmdn_HTTP/HTTP_response_status_32_5.txt | P/Status/418)
41. [ ` 421 Misdirected Request ` ](/en-US/docs/Web/HTTP/Status/421)
42. [ ` 422 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422)
43. [ ` 423 Locked ` ](/en-US/docs/Web/HTTP/Status/423)
44. [ ` 424 Failed Dependency ` ](/en-US/docs/Web/HTTP/Status/424)
45. [ ` 425 Too Early `... | |
Mmdn_HTTP/HTTP_response_status_31_3.txt | aders/Save-Data) Experimental
85. [ ` Sec-Browsing-Topics ` ](/en-US/docs/Web/HTTP/Headers/Sec-Browsing-Topics) Experimental Non-standard
86. [ ` Sec-CH-Prefers-Color-Scheme ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Color-Scheme) Experimental
87. [ ` Sec-CH-Prefers-Reduced-Motion ` ](/en-US/docs/W... | |
Mmdn_HTTP/HTTP_response_status_35_8.txt | e of bugged software out there. It is therefore recommended
to set the ` 302 ` code only as a response for [ ` GET ` ](/en-
US/docs/Web/HTTP/Methods/GET) or [ ` HEAD ` ](/en-
US/docs/Web/HTTP/Methods/HEAD) methods and to use [ ` 307 Temporary Redirect `
](/en-US/docs/Web/HTTP/Status/307) instead, as the method change i... | |
Mmdn_HTTP/HTTP_headers_17_5.txt | d ` ](/en-US/docs/Web/HTTP/Status/423)
44. [ ` 424 Failed Dependency ` ](/en-US/docs/Web/HTTP/Status/424)
45. [ ` 425 Too Early ` ](/en-US/docs/Web/HTTP/Status/425)
46. [ ` 426 Upgrade Required ` ](/en-US/docs/Web/HTTP/Status/426)
47. [ ` 428 Precondition Required ` ](/en-US/docs/Web/HTTP/Status/428)
... | |
Mmdn_HTTP/HTTP_headers_18_8.txt | ght choose to send fewer
resources.
**Note:** The [ ` Vary ` ](/en-US/docs/Web/HTTP/Headers/Vary) header is used
in responses to indicate that a different resource is sent for every different
value of the header (see [ HTTP Caching Vary ](/en-
US/docs/Web/HTTP/Caching#vary) ). Even if [ ` RTT ` ](/en-
US/docs/Web/HTTP... | |
Mmdn_HTTP/HTTP_response_status_55_4.txt | standard Deprecated
130. [ ` WWW-Authenticate ` ](/en-US/docs/Web/HTTP/Headers/WWW-Authenticate)
131. [ ` X-Content-Type-Options ` ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options)
132. [ ` X-DNS-Prefetch-Control ` ](/en-US/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control) Non-standard
133. [ ` X-Fo... | |
Mmdn_HTTP/CSP_directives_23_9.txt | sues)
## Our communities
* [ MDN Community ](/en-US/community)
* [ MDN Forum ](https://discourse.mozilla.org/c/mdn/236)
* [ MDN Chat ](/discord)
## Developers
* [ Web Technologies ](/en-US/docs/Web)
* [ Learn Web Development ](/en-US/docs/Learn)
* [ MDN Plus ](/en-US/plus)
* [ Hacks Blog ](https://h... | |
Mmdn_HTTP/HTTP_response_status_47_6.txt | Policy/script-src-attr)
25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem)
26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src)
27. [ ` CSP: style-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style... | |
Mmdn_HTTP/HTTP_response_status_53_5.txt | P/Status/417)
40. [ ` 418 I'm a teapot ` ](/en-US/docs/Web/HTTP/Status/418)
41. [ ` 421 Misdirected Request ` ](/en-US/docs/Web/HTTP/Status/421)
42. [ ` 422 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422)
43. [ ` 423 Locked ` ](/en-US/docs/Web/HTTP/Status/423)
44. [ ` 424 Failed Dependenc... | |
Mmdn_HTTP/Permissions_Policy_directives_16_1.txt | ism)
5. HTTP security
1. [ Content Security Policy (CSP) ](/en-US/docs/Web/HTTP/CSP)
2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security)
3. [ X-Content-Type-Options ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options)
4. [ X-Frame-Options ](/en-US/do... | |
Mmdn_HTTP/CSP_directives_22_2.txt | 33. [ ` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range)
34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy)
35. [ ` Content-Security-Policy-Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only)
36. [ ` Content-Type ` ](/en-US... | |
Mmdn_HTTP/CSP_directives_26_3.txt | tal
85. [ ` Sec-Browsing-Topics ` ](/en-US/docs/Web/HTTP/Headers/Sec-Browsing-Topics) Experimental Non-standard
86. [ ` Sec-CH-Prefers-Color-Scheme ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Color-Scheme) Experimental
87. [ ` Sec-CH-Prefers-Reduced-Motion ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Pre... | |
Mmdn_HTTP/Header_Field_Definitions_51_0.txt | ### 14.42 Upgrade
The Upgrade general-header allows the client to specify what additional
communication protocols it supports and would like to use if the server finds
it appropriate to switch protocols. The server MUST use the Upgrade header
field within a 101 (Switching Protocols) response to indicate which
protoc... | |
Mmdn_HTTP/Permissions_Policy_directives_7_3.txt | fers-Color-Scheme ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Color-Scheme) Experimental
87. [ ` Sec-CH-Prefers-Reduced-Motion ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Reduced-Motion) Experimental
88. [ ` Sec-CH-Prefers-Reduced-Transparency ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Reduced-Tr... | |
Mmdn_HTTP/HTTP_headers_15_6.txt | /Web/HTTP/Headers/Content-Security-Policy/style-src)
27. [ ` CSP: style-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src-attr)
28. [ ` CSP: style-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src-elem)
29. [ ` CSP: trusted-types ` ](/en-US/docs/Web/HTTP/H... | |
Mmdn_HTTP/HTTP_response_status_51_8.txt | Long
## Specifications
Specification
---
[ HTTP Semantics
# status.414 ](https://httpwg.org/specs/rfc9110.html#status.414)
## See also
* [ URI ](/en-US/docs/Glossary/URI)
## Help improve MDN
Was this page helpful to you?
Yes No
[ Learn how to contribute
](https://github.com/mdn/content/b... | |
Mmdn_HTTP/CSP_directives_27_7.txt | licy: document-domain ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/document-domain) Experimental
10. [ Permissions-Policy: encrypted-media ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/encrypted-media) Experimental
11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/... | |
Mmdn_HTTP/Permissions_Policy_directives_2_4.txt | pe-Options ` ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options)
132. [ ` X-DNS-Prefetch-Control ` ](/en-US/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control) Non-standard
133. [ ` X-Forwarded-For ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-For) Non-standard
134. [ ` X-Forwarded-Host ` ](/en-US/docs/Web/HT... | |
Mmdn_HTTP/Permissions_Policy_directives_25_4.txt | -Content-Type-Options ` ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options)
132. [ ` X-DNS-Prefetch-Control ` ](/en-US/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control) Non-standard
133. [ ` X-Forwarded-For ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-For) Non-standard
134. [ ` X-Forwarded-Host ` ](/en-US/... | |
Mmdn_HTTP/HTTP_headers_1_2.txt | andard Deprecated
29. [ ` Content-Encoding ` ](/en-US/docs/Web/HTTP/Headers/Content-Encoding)
30. [ ` Content-Language ` ](/en-US/docs/Web/HTTP/Headers/Content-Language)
31. [ ` Content-Length ` ](/en-US/docs/Web/HTTP/Headers/Content-Length)
32. [ ` Content-Location ` ](/en-US/docs/Web/HTTP/Headers/Co... | |
Mmdn_HTTP/HTTP_response_status_25_5.txt | /Web/HTTP/Status/418)
41. [ ` 421 Misdirected Request ` ](/en-US/docs/Web/HTTP/Status/421)
42. [ ` 422 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422)
43. [ ` 423 Locked ` ](/en-US/docs/Web/HTTP/Status/423)
44. [ ` 424 Failed Dependency ` ](/en-US/docs/Web/HTTP/Status/424)
45. [ ` 425 Too... | |
Mmdn_HTTP/HTTP_response_status_30_8.txt | hods/HEAD) .
If the server _does_ recognize the method, but intentionally does not support
it, the appropriate response is [ ` 405 Method Not Allowed ` ](/en-
US/docs/Web/HTTP/Status/405) .
**Note:**
* A 501 error is not something you can fix, but requires a fix by the web server you are trying to access.
* A 5... | |
Mmdn_HTTP/HTTP_request_methods_4_6.txt | script-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src)
24. [ ` CSP: script-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-attr)
25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem)
26. [ ` CSP: style-sr... | |
Mmdn_HTTP/HTTP_headers_14_6.txt | ocs/Web/HTTP/Headers/Content-Security-Policy/script-src-attr)
25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem)
26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src)
27. [ ` CSP: style-src-attr ` ](/en-US/docs/Web/HTTP... | |
Mmdn_HTTP/HTTP_headers_17_9.txt | ct behavior to change in the future.
| |
Mmdn_HTTP/HTTP_headers_32_5.txt | ` ](/en-US/docs/Web/HTTP/Status/426)
47. [ ` 428 Precondition Required ` ](/en-US/docs/Web/HTTP/Status/428)
48. [ ` 429 Too Many Requests ` ](/en-US/docs/Web/HTTP/Status/429)
49. [ ` 431 Request Header Fields Too Large ` ](/en-US/docs/Web/HTTP/Status/431)
50. [ ` 451 Unavailable For Legal Reasons ` ](/e... | |
Mmdn_HTTP/CSP_directives_19_8.txt | ies between implementations
and the behavior may change in the future.
The HTTP [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-
Security-Policy) (CSP) **` plugin-types ` ** directive restricts the set of
plugins that can be embedded into a document by limiting the types of
resources which can be ... | |
Mmdn_HTTP/HTTP_response_status_0_4.txt | -DNS-Prefetch-Control) Non-standard
133. [ ` X-Forwarded-For ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-For) Non-standard
134. [ ` X-Forwarded-Host ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-Host) Non-standard
135. [ ` X-Forwarded-Proto ` ](/en-US/docs/Web/HTTP/Headers/X-Forwarded-Proto) Non-standard... | |
Mmdn_HTTP/HTTP_response_status_29_8.txt |
HTTP/1.1 407 Proxy Authentication Required
Date: Wed, 21 Oct 2015 07:28:00 GMT
Proxy-Authenticate: Basic realm="Access to internal site"
## Specifications
Specification
---
[ HTTP Semantics
# status.407 ](https://www.rfc-editor.org/rfc/rfc9110#status.407)
## Browser compatibility... | |
Mmdn_HTTP/Permissions_Policy_directives_16_6.txt | ty-Policy/script-src-attr)
25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem)
26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src)
27. [ ` CSP: style-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/st... | |
Mmdn_HTTP/HTTP_request_methods_8_1.txt | US/docs/Web/HTTP/Connection_management_in_HTTP_1.x)
7. [ Protocol upgrade mechanism ](/en-US/docs/Web/HTTP/Protocol_upgrade_mechanism)
5. HTTP security
1. [ Content Security Policy (CSP) ](/en-US/docs/Web/HTTP/CSP)
2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport... | |
Mmdn_HTTP/HTTP_response_status_1_2.txt | HTTP/Headers/Content-Security-Policy-Report-Only)
36. [ ` Content-Type ` ](/en-US/docs/Web/HTTP/Headers/Content-Type)
37. [ ` Cookie ` ](/en-US/docs/Web/HTTP/Headers/Cookie)
38. [ ` Critical-CH ` ](/en-US/docs/Web/HTTP/Headers/Critical-CH) Experimental
39. [ ` Cross-Origin-Embedder-Policy ` ](/en-US/do... | |
Mmdn_HTTP/Permissions_Policy_directives_23_8.txt | he [ `
Promise ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise)
returned by ` navigator.credentials.create({publicKey}) ` will reject with a `
NotAllowedError ` [ ` DOMException ` ](/en-US/docs/Web/API/DOMException) . If
the method is called cross-origin. the [ ` Promise ` ](/en-
US/docs/Web/JavaScript/... | |
Mmdn_HTTP/CSP_directives_28_4.txt | enticate ` ](/en-US/docs/Web/HTTP/Headers/WWW-Authenticate)
131. [ ` X-Content-Type-Options ` ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options)
132. [ ` X-DNS-Prefetch-Control ` ](/en-US/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control) Non-standard
133. [ ` X-Forwarded-For ` ](/en-US/docs/Web/HTTP/Header... | |
Mmdn_HTTP/CSP_directives_11_9.txt | mdn/)
* [ MDN Blog RSS Feed ](/en-US/blog/rss.xml)
## MDN
* [ About ](/en-US/about)
* [ Blog ](/en-US/blog/)
* [ Careers ](https://www.mozilla.org/en-US/careers/listings/?team=ProdOps)
* [ Advertise with us ](/en-US/advertising)
## Support
* [ Product help ](https://support.mozilla.org/products/mdn-p... | |
Mmdn_HTTP/Permissions_Policy_directives_0_8.txt | avigator/getBattery "getBattery\(\)")
calls will return a [ ` Promise ` ](/en-
US/docs/Web/JavaScript/Reference/Global_Objects/Promise) that rejects with a [
` DOMException ` ](/en-US/docs/Web/API/DOMException) of type ` NotAllowedError
` .
## Syntax
http
Permissions-Policy: battery=<allowlist>;
... | |
Mmdn_HTTP/CSP_directives_3_8.txt | s between implementations
and the behavior may change in the future.
The HTTP [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-
Security-Policy) (CSP) **` prefetch-src ` ** directive specifies valid
resources that may be prefetched or prerendered.
CSP version | 3
---|---
Directive type | ... | |
Mmdn_HTTP/CSP_directives_13_9.txt | oduct help ](https://support.mozilla.org/products/mdn-plus)
* [ Report an issue ](/en-US/docs/MDN/Community/Issues)
## Our communities
* [ MDN Community ](/en-US/community)
* [ MDN Forum ](https://discourse.mozilla.org/c/mdn/236)
* [ MDN Chat ](/discord)
## Developers
* [ Web Technologies ](/en-US/docs/... | |
Mmdn_HTTP/HTTP_headers_16_1.txt | TTP security
1. [ Content Security Policy (CSP) ](/en-US/docs/Web/HTTP/CSP)
2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security)
3. [ X-Content-Type-Options ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options)
4. [ X-Frame-Options ](/en-US/docs/Web/HTTP... | |
Mmdn_HTTP/CSP_directives_13_8.txt | ective)
[ ` default-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/default-src) fallback | Yes. If this directive is absent, the user agent will look for the ` default-src ` directive.
## Syntax
One or more sources can be allowed for the ` child-src ` policy:
http
Content-Secur... | |
Mmdn_HTTP/HTTP_headers_33_0.txt | * Skip to main content
* Skip to search
* Skip to select language
[ MDN Web Docs ](/en-US/) Open main menu
* References [ References ](/en-US/docs/Web)
* [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web)
* [ HTML Structure of content on the web ](/en-US/do... | |
Mmdn_HTTP/HTTP_headers_28_5.txt | de Required ` ](/en-US/docs/Web/HTTP/Status/426)
47. [ ` 428 Precondition Required ` ](/en-US/docs/Web/HTTP/Status/428)
48. [ ` 429 Too Many Requests ` ](/en-US/docs/Web/HTTP/Status/429)
49. [ ` 431 Request Header Fields Too Large ` ](/en-US/docs/Web/HTTP/Status/431)
50. [ ` 451 Unavailable For Legal Re... | |
Mmdn_HTTP/HTTP_response_status_32_6.txt | ipt-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-attr)
25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem)
26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src)
27. [ ` CSP: style-src-attr... | |
Mmdn_HTTP/CSP_directives_3_9.txt | s://mozilla.social/@mdn)
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Mmdn_HTTP/CSP_directives_9_0.txt | * Skip to main content
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Mmdn_HTTP/CSP_directives_15_1.txt | ](/en-US/docs/Web/HTTP/Protocol_upgrade_mechanism)
5. HTTP security
1. [ Content Security Policy (CSP) ](/en-US/docs/Web/HTTP/CSP)
2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security)
3. [ X-Content-Type-Options ](/en-US/docs/Web/HTTP/Headers/X-Content-Typ... | |
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Mmdn_HTTP/Permissions_Policy_directives_30_2.txt | /docs/Web/HTTP/Headers/Content-Range)
34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy)
35. [ ` Content-Security-Policy-Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only)
36. [ ` Content-Type ` ](/en-US/docs/Web/HTTP/Headers/Content-Type... | |
Mmdn_HTTP/CSP_directives_8_0.txt | * Skip to main content
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Mmdn_HTTP/HTTP_response_status_9_7.txt | xperimental
11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental
12. [ Permissions-Policy: execution-while-out-of-viewport ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-out-of-viewport) Experimen... | |
Mmdn_HTTP/HTTP_headers_28_2.txt | /Web/HTTP/Headers/Content-Type)
37. [ ` Cookie ` ](/en-US/docs/Web/HTTP/Headers/Cookie)
38. [ ` Critical-CH ` ](/en-US/docs/Web/HTTP/Headers/Critical-CH) Experimental
39. [ ` Cross-Origin-Embedder-Policy ` ](/en-US/docs/Web/HTTP/Headers/Cross-Origin-Embedder-Policy)
40. [ ` Cross-Origin-Opener-Policy `... | |
Mmdn_HTTP/CSP_directives_4_7.txt | olicy: encrypted-media ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/encrypted-media) Experimental
11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental
12. [ Permissions-Policy: execution-while-out-of-viewport ]... | |
Mmdn_HTTP/HTTP_response_status_17_1.txt | 7. [ Protocol upgrade mechanism ](/en-US/docs/Web/HTTP/Protocol_upgrade_mechanism)
5. HTTP security
1. [ Content Security Policy (CSP) ](/en-US/docs/Web/HTTP/CSP)
2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security)
3. [ X-Content-Type-Options ](/en-US/doc... | |
Mmdn_HTTP/HTTP_response_status_24_3.txt | US/docs/Web/HTTP/Headers/RTT) Experimental
84. [ ` Save-Data ` ](/en-US/docs/Web/HTTP/Headers/Save-Data) Experimental
85. [ ` Sec-Browsing-Topics ` ](/en-US/docs/Web/HTTP/Headers/Sec-Browsing-Topics) Experimental Non-standard
86. [ ` Sec-CH-Prefers-Color-Scheme ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Pr... | |
Mmdn_HTTP/Permissions_Policy_directives_28_3.txt | -Color-Scheme ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Color-Scheme) Experimental
87. [ ` Sec-CH-Prefers-Reduced-Motion ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Reduced-Motion) Experimental
88. [ ` Sec-CH-Prefers-Reduced-Transparency ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Reduced-Transp... | |
Mmdn_HTTP/CSP_directives_13_0.txt | * Skip to main content
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Mmdn_HTTP/Permissions_Policy_directives_26_8.txt | eption) of
type ` SecurityError ` .
## Syntax
http
Permissions-Policy: local-fonts=<allowlist>;
` <allowlist> `
A list of origins for which permission is granted to use the feature. See [ `
Permissions-Policy ` > Syntax ](/en-US/docs/Web/HTTP/Headers/Permissions-
Policy#syntax) for more d... | |
Mmdn_HTTP/CSP_directives_8_5.txt | est ` ](/en-US/docs/Web/HTTP/Status/421)
42. [ ` 422 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422)
43. [ ` 423 Locked ` ](/en-US/docs/Web/HTTP/Status/423)
44. [ ` 424 Failed Dependency ` ](/en-US/docs/Web/HTTP/Status/424)
45. [ ` 425 Too Early ` ](/en-US/docs/Web/HTTP/Status/425)
46. [ ... | |
Mmdn_HTTP/Permissions_Policy_directives_26_9.txt | content are ©1998â 2024 by individual mozilla.org
contributors. Content available under [ a Creative Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .
*[
Non-standard
]: Non-standard. Check cross-browser support b... | |
Mmdn_HTTP/CSP_directives_29_6.txt | ocs/Web/HTTP/Headers/Content-Security-Policy/script-src-attr)
25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem)
26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src)
27. [ ` CSP: style-src-attr ` ](/en-US/docs/Web/HTTP... | |
Mmdn_HTTP/HTTP_response_status_46_2.txt | ` ](/en-US/docs/Web/HTTP/Headers/Content-Length)
32. [ ` Content-Location ` ](/en-US/docs/Web/HTTP/Headers/Content-Location)
33. [ ` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range)
34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy)
35. [ ` Content-Sec... | |
Mmdn_HTTP/CSP_directives_13_1.txt | gement_in_HTTP_1.x)
7. [ Protocol upgrade mechanism ](/en-US/docs/Web/HTTP/Protocol_upgrade_mechanism)
5. HTTP security
1. [ Content Security Policy (CSP) ](/en-US/docs/Web/HTTP/CSP)
2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security)
3. [ X-Content-Ty... | |
Mmdn_HTTP/HTTP_request_methods_3_6.txt | 23. [ ` CSP: script-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src)
24. [ ` CSP: script-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-attr)
25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem)
26. [ ` C... | |
Mmdn_HTTP/HTTP_response_status_16_3.txt | TP/Headers/RTT) Experimental
84. [ ` Save-Data ` ](/en-US/docs/Web/HTTP/Headers/Save-Data) Experimental
85. [ ` Sec-Browsing-Topics ` ](/en-US/docs/Web/HTTP/Headers/Sec-Browsing-Topics) Experimental Non-standard
86. [ ` Sec-CH-Prefers-Color-Scheme ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Color-Sc... | |
Mmdn_HTTP/CSP_directives_5_6.txt | olicy/script-src)
24. [ ` CSP: script-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-attr)
25. [ ` CSP: script-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src-elem)
26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/styl... | |
Mmdn_HTTP/HTTP_headers_8_7.txt | ons-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental
12. [ Permissions-Policy: execution-while-out-of-viewport ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-out-of-viewport) Experimental
13. [ Permissions-Poli... | |
Mmdn_HTTP/HTTP_headers_8_5.txt | 42. [ ` 422 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422)
43. [ ` 423 Locked ` ](/en-US/docs/Web/HTTP/Status/423)
44. [ ` 424 Failed Dependency ` ](/en-US/docs/Web/HTTP/Status/424)
45. [ ` 425 Too Early ` ](/en-US/docs/Web/HTTP/Status/425)
46. [ ` 426 Upgrade Required ` ](/en-US/docs/Web... | |
Mmdn_HTTP/HTTP_headers_11_7.txt | ocument-domain ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/document-domain) Experimental
10. [ Permissions-Policy: encrypted-media ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/encrypted-media) Experimental
11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permiss... | |
Mmdn_HTTP/CSP_directives_15_7.txt | HTTP/Headers/Permissions-Policy/encrypted-media) Experimental
11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental
12. [ Permissions-Policy: execution-while-out-of-viewport ](/en-US/docs/Web/HTTP/Headers/Permissions... | |
Mmdn_HTTP/HTTP_headers_5_8.txt | n-US/docs/Glossary/Response_header)
---|---
[ Forbidden header name ](/en-US/docs/Glossary/Forbidden_header_name) | no
## Syntax
http
Referrer-Policy: no-referrer
Referrer-Policy: no-referrer-when-downgrade
Referrer-Policy: origin
Referrer-Policy: origin-when-cross-origin
Ref... | |
Mmdn_HTTP/HTTP_response_status_20_2.txt | TTP/Headers/Content-Location)
33. [ ` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range)
34. [ ` Content-Security-Policy ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy)
35. [ ` Content-Security-Policy-Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only)
... | |
Mmdn_HTTP/HTTP_request_methods_2_3.txt | [ ` Save-Data ` ](/en-US/docs/Web/HTTP/Headers/Save-Data) Experimental
85. [ ` Sec-Browsing-Topics ` ](/en-US/docs/Web/HTTP/Headers/Sec-Browsing-Topics) Experimental Non-standard
86. [ ` Sec-CH-Prefers-Color-Scheme ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Color-Scheme) Experimental
87. [ ` Sec-C... | |
Mmdn_HTTP/HTTP_response_status_17_0.txt | * Skip to main content
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Mmdn_HTTP/HTTP_headers_11_0.txt | * Skip to main content
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Mmdn_HTTP/HTTP_response_status_39_9.txt | MDN Plus ](/en-US/plus)
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Mmdn_HTTP/Permissions_Policy_directives_28_0.txt | * Skip to main content
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Mmdn_HTTP/Permissions_Policy_directives_7_6.txt | em)
26. [ ` CSP: style-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src)
27. [ ` CSP: style-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src-attr)
28. [ ` CSP: style-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src-elem)
29. [ `... | |
Mmdn_HTTP/HTTP_request_methods_8_7.txt | -domain) Experimental
10. [ Permissions-Policy: encrypted-media ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/encrypted-media) Experimental
11. [ Permissions-Policy: execution-while-not-rendered ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-not-rendered) Experimental
12. [ Permiss... | |
Mmdn_HTTP/Permissions_Policy_directives_15_6.txt | ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src)
27. [ ` CSP: style-src-attr ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src-attr)
28. [ ` CSP: style-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/style-src-elem)
29. [ ` CSP: trusted-types ` ](/en-US/d... | |
Mmdn_HTTP/Permissions_Policy_directives_10_1.txt | b/HTTP/CSP)
2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security)
3. [ X-Content-Type-Options ](/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options)
4. [ X-Frame-Options ](/en-US/docs/Web/HTTP/Headers/X-Frame-Options)
5. [ X-XSS-Protection ](/en-US/docs/Web... | |
Mmdn_HTTP/HTTP_response_status_53_1.txt | /HTTP/Connection_management_in_HTTP_1.x)
7. [ Protocol upgrade mechanism ](/en-US/docs/Web/HTTP/Protocol_upgrade_mechanism)
5. HTTP security
1. [ Content Security Policy (CSP) ](/en-US/docs/Web/HTTP/CSP)
2. [ HTTP Strict Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security)
... | |
Mmdn_HTTP/List_of_HTTP_header_fields_6_0.txt | ## Request fields [ [ edit
](/w/index.php?title=List_of_HTTP_header_fields&action=edit§ion=5 "Edit
section: Request fields") ]
### Standard request fields [ [ edit
](/w/index.php?title=List_of_HTTP_header_fields&action=edit§ion=6 "Edit
section: Standard request fields") ]
Name | Description | Exampl... | |
Mmdn_HTTP/HTTP_headers_14_3.txt | ers/Save-Data) Experimental
85. [ ` Sec-Browsing-Topics ` ](/en-US/docs/Web/HTTP/Headers/Sec-Browsing-Topics) Experimental Non-standard
86. [ ` Sec-CH-Prefers-Color-Scheme ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefers-Color-Scheme) Experimental
87. [ ` Sec-CH-Prefers-Reduced-Motion ` ](/en-US/docs/Web... |
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