id stringlengths 16 145 | text stringlengths 1 179k | title stringclasses 1
value |
|---|---|---|
Mmdn_HTTP/HTTP_headers_26_0.txt | * Skip to main content
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Mmdn_HTTP/HTTP_response_status_29_9.txt | ]: Non-standard. Check cross-browser support before using.
*[
Deprecated
]: Deprecated. Not for use in new websites.
*[
Experimental
]: Experimental. Expect behavior to c... | |
Mmdn_HTTP/HTTP_response_status_6_6.txt | /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/docs/Web/H... | |
Mmdn_HTTP/CSP_directives_26_7.txt | ypted-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-Policy/execution-while-out-of-viewp... | |
Mmdn_HTTP/HTTP_headers_9_5.txt | /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. [ ` 426 Upgrade ... | |
Mmdn_HTTP/HTTP_headers_28_0.txt | * Skip to main content
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Mmdn_HTTP/List_of_HTTP_header_fields_3_0.txt | ## Field names [ [ edit
](/w/index.php?title=List_of_HTTP_header_fields&action=edit§ion=2 "Edit
section: Field names") ]
A core set of fields is standardized by the [ Internet Engineering Task Force
](/wiki/Internet_Engineering_Task_Force "Internet Engineering Task Force")
(IETF) in [ RFC ](/wiki/RFC_\(identif... | |
Mmdn_HTTP/HTTP_response_status_38_6.txt | pt-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/style-src)
... | |
Mmdn_HTTP/HTTP_headers_5_4.txt | aders/Warning) Deprecated
129. [ ` Width ` ](/en-US/docs/Web/HTTP/Headers/Width) Non-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-Contro... | |
Mmdn_HTTP/HTTP_request_methods_7_4.txt | 129. [ ` Width ` ](/en-US/docs/Web/HTTP/Headers/Width) Non-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/He... | |
Mmdn_HTTP/HTTP_response_status_49_5.txt | ](/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)
48. [ ` 429 Too Many Requests ` ](/en-US/docs/Web/HTTP/Status/429)
49. [ ` 431 Request Header Fields Too Large ` ](/en-US/docs/Web/... | |
Mmdn_HTTP/CSP_directives_28_2.txt | ders/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)
36. [ `... | |
Mmdn_HTTP/Permissions_Policy_directives_13_7.txt | t-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-Policy: fullscreen ](/en-US/docs/... | |
Mmdn_HTTP/Permissions_Policy_directives_9_8.txt | -Policy ` > Syntax ](/en-US/docs/Web/HTTP/Headers/Permissions-
Policy#syntax) for more details.
## Default policy
The default allowlist for ` microphone ` is ` self ` .
## Specifications
Specification
---
[ Media Capture and Streams
# permissions-policy-integration ](https://w3c.github.io/mediacapture-
ma... | |
Mmdn_HTTP/HTTP_headers_0_7.txt | t-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-Policy: fullscreen ](/en-US/docs/W... | |
Mmdn_HTTP/HTTP_headers_5_10.txt | pecific preferences/settings
### Firefox preferences
You can configure the _default_ referrer policy in Firefox preferences. The
preference names are version specific:
* Firefox version 59 and later: ` network.http.referer.defaultPolicy ` (and ` network.http.referer.defaultPolicy.pbmode ` for private networks)
... | |
Mmdn_HTTP/CSP_directives_17_8.txt | : Matches all attempts to load from any subdomain of example.com. Also matches ` https ` resources.
* ` mail.example.com:443 ` : Matches all attempts to load from port 443 on mail.example.com.
* ` https://store.example.com ` : Matches all attempts to access store.example.com using ` https: ` .
* ` *.example.co... | |
Mmdn_HTTP/HTTP_headers_10_3.txt | /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-CH-Prefers-Reduced-Motion ` ](/... | |
Mmdn_HTTP/HTTP_response_status_53_9.txt | perimental
]: Experimental. Expect behavior to change in the future.
| |
Mmdn_HTTP/CSP_directives_11_1.txt | eb/HTTP/Session)
6. [ Connection management in HTTP/1.x ](/en-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 Transpo... | |
Mmdn_HTTP/HTTP_response_status_14_5.txt | /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 ` ](/en-... | |
Mmdn_HTTP/HTTP_response_status_60_4.txt | 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-Forwarded-For ` ](/en-US/... | |
Mmdn_HTTP/HTTP_headers_36_1.txt | A typical HTTP session ](/en-US/docs/Web/HTTP/Session)
6. [ Connection management in HTTP/1.x ](/en-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... | |
Mmdn_HTTP/HTTP_headers_6_6.txt | /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 ` ](/en-US/docs/Web/HT... | |
Mmdn_HTTP/Permissions_Policy_directives_10_0.txt | * Skip to main content
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Mmdn_HTTP/HTTP_headers_5_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-s... | |
Mmdn_HTTP/HTTP_headers_2_6.txt | cy/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-src... | |
Mmdn_HTTP/CSP_directives_12_0.txt | * Skip to main content
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Mmdn_HTTP/Permissions_Policy_directives_16_7.txt | ) 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-Policy/execution-while-out-of-viewport) Experi... | |
Mmdn_HTTP/Permissions_Policy_directives_27_9.txt | bout/governance/policies/participation/)
Visit [ Mozilla Corporationâs ](https://www.mozilla.org) not-for-profit
parent, the [ Mozilla Foundation ](https://foundation.mozilla.org/) .
Portions of this content are ©1998â 2024 by individual mozilla.org
contributors. Content available under [ a Creative Common... | |
Mmdn_HTTP/CSP_directives_1_6.txt | olicy/sandbox)
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-... | |
Mmdn_HTTP/CSP_directives_27_6.txt | ers/Content-Security-Policy/sandbox)
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-Secur... | |
Mmdn_HTTP/HTTP_request_methods_2_7.txt | crypted-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 ](/en-US/d... | |
Mmdn_HTTP/HTTP_response_status_24_5.txt | cs/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/HTTP/Status/423)
44. [ ` 424 Failed... | |
Mmdn_HTTP/CSP_directives_1_7.txt | ](/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/Permissions-Policy/exe... | |
Mmdn_HTTP/HTTP_headers_13_8.txt | field.
` Last-Modified ` is also used by [ crawlers ](/en-US/docs/Glossary/Crawler)
to adjust crawl frequency, by browsers in [ heuristic caching ](/en-
US/docs/Web/HTTP/Caching#heuristic_caching) , and by content management
systems (CMS) to display the time the content was last modified.
Header type | [ Represent... | |
Mmdn_HTTP/HTTP_response_status_28_1.txt | ion_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)
3. [ X-Co... | |
Mmdn_HTTP/CSP_directives_23_1.txt | rade_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-Type-Options)
4. [ X-Frame-Options ... | |
Mmdn_HTTP/Permissions_Policy_directives_23_3.txt | ` 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-Prefers-Reduced-Motion) Experimental
88. [ ` Sec-CH-Prefers-Reduced-Transparency ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-Prefer... | |
Mmdn_HTTP/HTTP_response_status_16_8.txt | 3.2 ](https://www.rfc-editor.org/rfc/rfc2324#section-2.3.2)
## Browser compatibility
BCD tables only load in the browser with JavaScript enabled. Enable
JavaScript to view data.
## See also
* [ Wikipedia: Hyper Text Coffee Pot Control Protocol ](https://en.wikipedia.org/wiki/Hyper_Text_Coffee_Pot_Control_... | |
Mmdn_HTTP/HTTP_response_status_56_7.txt | dered) 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-Policy: fullscreen ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/fullscreen)
14. [ Permissions-Policy: gamepad... | |
Mmdn_HTTP/HTTP_headers_12_8.txt | error.
The **` If-Unmodified-Since ` ** HTTP header is commonly used in the following
situations:
* In conjunction with non- [ safe ](/en-US/docs/Glossary/Safe/HTTP) methods, like [ ` POST ` ](/en-US/docs/Web/HTTP/Methods/POST) , this header can be used to implement an [ optimistic concurrency control ](https://en... | |
Mmdn_HTTP/HTTP_request_methods_1_7.txt | dia ](/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 ](/en-US/docs/Web/HT... | |
Mmdn_HTTP/CSP_directives_10_6.txt | /sandbox)
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)... | |
Mmdn_HTTP/HTTP_response_status_36_9.txt | before using.
*[
Deprecated
]: Deprecated. Not for use in new websites.
*[
Experimental
]: Experimental. Expect behavior to change in the future.
| |
Mmdn_HTTP/HTTP_response_status_17_6.txt | )
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/style-src)
27. [... | |
Mmdn_HTTP/HTTP_headers_24_1.txt | /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 control (CORS) ](/e... | |
Mmdn_HTTP/HTTP_response_status_60_0.txt | * Skip to main content
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* [ HTML Structure of content on the web ](/en-US/do... | |
Mmdn_HTTP/HTTP_response_status_19_7.txt | ndered) 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-Policy: fullscreen ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/fullscreen)
14. [ Permissions-Policy: gamepa... | |
Mmdn_HTTP/HTTP_response_status_17_7.txt | crypted-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 ](/en-US/d... | |
Mmdn_HTTP/HTTP_response_status_57_8.txt | ntics
# status.426 ](https://httpwg.org/specs/rfc9110.html#status.426)
## See also
* [ ` Upgrade ` ](/en-US/docs/Web/HTTP/Headers/Upgrade)
* [ ` 101 ` ](/en-US/docs/Web/HTTP/Status/101) ` Switching Protocols `
## Help improve MDN
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Mmdn_HTTP/Permissions_Policy_directives_32_1.txt | 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/HTTP/Headers/X-XSS-Protection)
6. [ Mozilla web security guidelines ](https://wiki.mo... | |
Mmdn_HTTP/HTTP_headers_32_7.txt | [ Permissions-Policy: fullscreen ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/fullscreen)
14. [ Permissions-Policy: gamepad ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/gamepad) Experimental
15. [ Permissions-Policy: geolocation ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/geolocation)
16. ... | |
Mmdn_HTTP/HTTP_response_status_50_4.txt | /en-US/docs/Web/HTTP/Headers/Width) Non-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-... | |
Mmdn_HTTP/HTTP_response_status_26_3.txt | /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) Expe... | |
Mmdn_HTTP/HTTP_response_status_44_6.txt | t-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/style-src)
... | |
Mmdn_HTTP/CSP_directives_29_0.txt | * Skip to main content
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[ 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/Permissions_Policy_directives_29_7.txt | rmissions-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-Policy: fullscreen ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/fullscree... | |
Mmdn_HTTP/Permissions_Policy_directives_0_6.txt | rs/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-src-attr)
28. [ ` CSP: style-src-elem ` ](/en-US/docs/Web/HTTP/Headers/Content-Sec... | |
Mmdn_HTTP/HTTP_headers_29_1.txt | /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-S... | |
Mmdn_HTTP/CSP_directives_23_0.txt | * Skip to main content
* Skip to search
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[ 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/CSP_directives_11_2.txt | cs/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/Content-Location)
33. [ ` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range)
34. [ ` Content-Security-Policy ` ](/en-US/docs/... | |
Mmdn_HTTP/HTTP_headers_18_7.txt | n ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/fullscreen)
14. [ Permissions-Policy: gamepad ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/gamepad) Experimental
15. [ Permissions-Policy: geolocation ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/geolocation)
16. [ Permissions-Policy: gyroscope ... | |
Mmdn_HTTP/CSP_directives_13_4.txt | s/Web/HTTP/Headers/Width) Non-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) N... | |
Mmdn_HTTP/HTTP_response_status_4_0.txt | * Skip to main content
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[ 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_7_3.txt | /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-Prefers-Color... | |
Mmdn_HTTP/HTTP_headers_27_7.txt | ssions-Policy: fullscreen ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/fullscreen)
14. [ Permissions-Policy: gamepad ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/gamepad) Experimental
15. [ Permissions-Policy: geolocation ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/geolocation)
16. [ Permis... | |
Mmdn_HTTP/HTTP_headers_0_9.txt | w to contribute
](https://github.com/mdn/content/blob/main/CONTRIBUTING.md "This will take you
to our contribution guidelines on GitHub.") .
This page was last modified on Aug 10, 2023 by [ MDN contributors ](/en-
US/docs/Web/HTTP/Headers/Clear-Site-Data/contributors.txt) .
[ View this page on GitHub
](https://git... | |
Mmdn_HTTP/CSP_directives_0_3.txt | s/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) Exp... | |
Mmdn_HTTP/HTTP_response_status_12_7.txt | s-Policy: execution-while-out-of-viewport ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/execution-while-out-of-viewport) Experimental
13. [ Permissions-Policy: fullscreen ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/fullscreen)
14. [ Permissions-Policy: gamepad ](/en-US/docs/Web/HTTP/Headers/Permissio... | |
Mmdn_HTTP/List_of_HTTP_header_fields_7_0.txt | ## Response fields [ [ edit
](/w/index.php?title=List_of_HTTP_header_fields&action=edit§ion=8 "Edit
section: Response fields") ]
### Standard response fields [ [ edit
](/w/index.php?title=List_of_HTTP_header_fields&action=edit§ion=9 "Edit
section: Standard response fields") ]
Field name | Description ... | |
Mmdn_HTTP/HTTP_response_status_19_4.txt | etch-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/HTTP/Headers/X-Forwarded-Host) Non-standard
135. [ ` X-Forwarded-Proto ` ](/en-US/docs/W... | |
Mmdn_HTTP/HTTP_response_status_28_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/Permissions_Policy_directives_25_7.txt | ecution-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-Policy: fullscreen... | |
Mmdn_HTTP/Permissions_Policy_directives_27_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) Experime... | |
Mmdn_HTTP/Permissions_Policy_directives_19_3.txt | ntal
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-Transparency) Experimental
89. [ ` Sec-CH-UA ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-... | |
Mmdn_HTTP/Permissions_Policy_directives_5_8.txt | * The [ ` Window.screen.isExtended ` ](/en-US/docs/Web/API/Screen/isExtended "Window.screen.isExtended") property will always return ` false ` .
## Syntax
http
Permissions-Policy: window-management=<allowlist>;
` <allowlist> `
A list of origins for which permission is granted to use th... | |
Mmdn_HTTP/CSP_directives_25_12.txt | browser support before using.
| |
Mmdn_HTTP/HTTP_headers_7_8.txt |
## Syntax
http
Accept-Ranges: <range-unit>
Accept-Ranges: none
## Directives
` <range-unit> `
Defines the range unit that the server supports. Though ` bytes ` is the only
range unit formally defined by [ RFC 7233
](https://datatracker.ietf.org/doc/html/rfc7233) , additional range... | |
Mmdn_HTTP/HTTP_response_status_13_5.txt | ](/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/docs/Web/HTTP/Status/424)
45... | |
Mmdn_HTTP/Header_Field_Definitions_2_0.txt | ### 14.2 Accept-Charset
The Accept-Charset request-header field can be used to indicate what character
sets are acceptable for the response. This field allows clients capable of
understanding more comprehensive or special- purpose character sets to signal
that capability to a server which is capable of representing ... | |
Mmdn_HTTP/CSP_directives_25_2.txt | ntent-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-Security-Policy-Report-Only ` ](/en-US... | |
Mmdn_HTTP/CSP_directives_18_7.txt | y/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-Policy/execution-while-out-of... | |
Mmdn_HTTP/HTTP_response_status_5_6.txt | SP: 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/style-src)
27. [ ` CSP: style-s... | |
Mmdn_HTTP/HTTP_request_methods_5_2.txt | eaders/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-Security-Policy-Report-Only `... | |
Mmdn_HTTP/HTTP_response_status_36_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_response_status_56_2.txt | urity-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)
37. [ ` Cookie ` ](/en-US/docs/Web/HTTP/Headers/Cookie)
38. [ ` Critical-CH ` ](/en-US/docs/Web/HTTP/Headers... | |
Mmdn_HTTP/HTTP_headers_12_9.txt |
"This will take you to GitHub to file a new issue.")
[ MDN logo ](/)
Your blueprint for a better internet.
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Mmdn_HTTP/Permissions_Policy_directives_25_6.txt | cript-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-src-attr)
28. [ ` CSP: style-src-elem... | |
Mmdn_HTTP/List_of_HTTP_header_fields_7_4.txt | } ] } `
Status | [ CGI ](/wiki/Common_Gateway_Interface "Common Gateway Interface") header field specifying the [ status ](/wiki/HTTP_status "HTTP status") of the HTTP response. Normal HTTP responses use a separate "Status-Line" instead, defined by RFC 9110. [65] | ` Status: 200 OK `
Timing-Allow-Origin |... | |
Mmdn_HTTP/HTTP_headers_4_9.txt | et the **legacy** X-Frame-Options
](https://helmetjs.github.io/#x-frame-options) header on old browsers.
**Warning:** It's recommended to use the [ ` Content-Security-Policy ` ](/en-
US/docs/Web/HTTP/Headers/Content-Security-Policy) HTTP header with the [ `
frame-ancestors ` ](/en-US/docs/Web/HTTP/Headers/Content-Secu... | |
Mmdn_HTTP/Permissions_Policy_directives_16_8.txt | ence/Global_Objects/Promise) returned by [ `
HTMLMediaElement.play() ` ](/en-US/docs/Web/API/HTMLMediaElement/play) will
reject with a [ ` DOMException ` ](/en-US/docs/Web/API/DOMException) . The [ `
autoplay ` ](/en-US/docs/Web/HTML/Element/audio#autoplay) attribute on [ `
<audio> ` ](/en-US/docs/Web/HTML/Element/audi... | |
Mmdn_HTTP/CSP_directives_1_9.txt | (formerly Twitter) ](https://twitter.com/mozdevnet)
* [ MDN on GitHub ](https://github.com/mdn/)
* [ MDN Blog RSS Feed ](/en-US/blog/rss.xml)
## MDN
* [ About ](/en-US/about)
* [ Blog ](/en-US/blog/)
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* [ Advertise with us ](/... | |
Mmdn_HTTP/HTTP_response_status_25_7.txt | 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 ](/en-US/docs/Web/HTTP/Head... | |
Mmdn_HTTP/HTTP_headers_22_5.txt | 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)
48. [ ` 429 Too Many Requests ` ](/en-US/docs/Web/HTTP/Stat... | |
Mmdn_HTTP/CSP_directives_15_9.txt | -Security-Policy%2Fscript-src-
attr%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-
us%2Fweb%2Fhttp%2Fheaders%2Fcontent-security-policy%2Fscript-src-
attr%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F0880a90f3811475d78bc4b2c344eb4146f25f66c%0A*... | |
Mmdn_HTTP/Permissions_Policy_directives_13_5.txt | ontent ` ](/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/HTTP/Status/426)
47. [ ` ... | |
Mmdn_HTTP/CSP_directives_19_6.txt | /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/He... | |
Mmdn_HTTP/HTTP_response_status_45_8.txt | idden ` ](/en-
US/docs/Web/HTTP/Status/403) status code, except that in situations resulting
in this status code, user authentication can allow access to the resource.
## Status
http
401 Unauthorized
## Example response
http
HTTP/1.1 401 Unauthorized
Date: Wed, 21 Oct 2015 0... | |
Mmdn_HTTP/Permissions_Policy_directives_10_3.txt | 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-Prefers-Reduced-Motion) Experimental
88. [ ` Sec-CH-Prefers-Reduced-Transparency ` ](/en-... |
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