id stringlengths 16 145 | text stringlengths 1 179k | title stringclasses 1
value |
|---|---|---|
Mmdn_HTTP/HTTP_response_status_15_0.txt | * Skip to main content
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Mmdn_HTTP/HTTP_headers_30_4.txt | [ ` 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/Headers/X-Forwarded-For) Non-standard
134. [ ` X-Forwarded-Host ` ](/e... | |
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Mmdn_HTTP/HTTP_headers_31_5.txt | 9. [ ` 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/... | |
Mmdn_HTTP/Permissions_Policy_directives_20_6.txt | -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/Permissions_Policy_directives_22_1.txt | ct-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.mozill... | |
Mmdn_HTTP/HTTP_headers_8_0.txt | * Skip to main content
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Mmdn_HTTP/HTTP_response_status_22_2.txt | ly ` ](/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. [ ` Cross-Origin-Embedd... | |
Mmdn_HTTP/Permissions_Policy_directives_29_4.txt | tent-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/HTTP/Headers/X-Forwarded-Host) Non-standard
13... | |
Mmdn_HTTP/Permissions_Policy_directives_35_9.txt | oducts/mdn-plus)
* [ Report an issue ](/en-US/docs/MDN/Community/Issues)
## Our communities
* [ MDN Community ](/en-US/community)
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## Developers
* [ Web Technologies ](/en-US/docs/Web)
* [ Learn Web Development ](/en-US/d... | |
Mmdn_HTTP/HTTP_request_methods_1_5.txt | 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/HTTP_response_status_18_0.txt | * Skip to main content
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Mmdn_HTTP/CSP_directives_15_5.txt | 18)
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-US/... | |
Mmdn_HTTP/HTTP_request_methods_6_4.txt | th ` ](/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-Pr... | |
Mmdn_HTTP/HTTP_response_status_28_8.txt | mples
Switching protocols might be used with [ WebSockets ](/en-
US/docs/Web/API/WebSockets_API) .
http
HTTP/1.1 101 Switching Protocols
Upgrade: websocket
Connection: Upgrade
## Specifications
Specification
---
[ HTTP Semantics
# status.101 ](https://httpwg.org/specs/rfc9110.ht... | |
Mmdn_HTTP/CSP_directives_16_2.txt | t-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)
35. [ ` Co... | |
Mmdn_HTTP/HTTP_request_methods_6_8.txt | -US/docs/Web/HTTP/Methods/PUT) ; which is always
idempotent. The word "idempotent" means that any number of repeated, identical
requests will leave the resource in the same state. For example if an auto-
incrementing counter field is an integral part of the resource, then a [ ` PUT
` ](/en-US/docs/Web/HTTP/Methods/PUT)... | |
Mmdn_HTTP/CSP_directives_12_1.txt | ol_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-Type-Options)
4. [ X-Frame-Op... | |
Mmdn_HTTP/HTTP_request_methods_3_9.txt | 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 Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .
*[
... | |
Mmdn_HTTP/HTTP_headers_12_4.txt | 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-Cont... | |
Mmdn_HTTP/HTTP_headers_25_5.txt | 37. [ ` 415 Unsupported Media Type ` ](/en-US/docs/Web/HTTP/Status/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 Requ... | |
Mmdn_HTTP/HTTP_response_status_2_5.txt | )
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-US/do... | |
Mmdn_HTTP/HTTP_headers_17_7.txt | ution-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/fullscreen)
14. [ Permissi... | |
Mmdn_HTTP/HTTP_headers_7_3.txt | P/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-Sch... | |
Mmdn_HTTP/HTTP_headers_13_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_17_10.txt | ncestors)
## Help improve MDN
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](https://github.com/mdn/content/blob/main/CONTRIBUTING.md "This will take you
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Mmdn_HTTP/HTTP_response_status_46_0.txt | * Skip to main content
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Mmdn_HTTP/HTTP_response_status_27_2.txt | t-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/docs/Web/HTTP/Headers/Content-S... | |
Mmdn_HTTP/HTTP_response_status_56_5.txt | 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)
48. [ ` 429 Too Many... | |
Mmdn_HTTP/Permissions_Policy_directives_19_9.txt | 98â 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 before using.
*... | |
Mmdn_HTTP/HTTP_response_status_4_1.txt | tion_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-C... | |
Mmdn_HTTP/HTTP_headers_11_13.txt | in the future.
*[
Experimental
]: Experimental. Expect behavior to change in the future.
*[
Deprecated
]: Deprecated. Not for use in new websites.
*[
Non-standard
... | |
Mmdn_HTTP/HTTP_response_status_52_8.txt | IBUTING.md "This will take you
to our contribution guidelines on GitHub.") .
This page was last modified on Apr 10, 2023 by [ MDN contributors ](/en-
US/docs/Web/HTTP/Status/422/contributors.txt) .
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Mmdn_HTTP/HTTP_response_status_25_4.txt | 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-Forwarded-Fo... | |
Mmdn_HTTP/List_of_HTTP_header_fields_5_0.txt | ## Size limits [ [ edit
](/w/index.php?title=List_of_HTTP_header_fields&action=edit§ion=4 "Edit
section: Size limits") ]
The standard imposes no limits to the size of each header field name or value,
or to the number of fields. However, most servers, clients, and proxy software
impose some limits for practical ... | |
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Mmdn_HTTP/HTTP_headers_10_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-Type... | |
Mmdn_HTTP/HTTP_headers_19_7.txt | -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/Permissions-Policy/gamepad) Experi... | |
Mmdn_HTTP/Permissions_Policy_directives_20_9.txt | a 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 Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_co... | |
Mmdn_HTTP/Permissions_Policy_directives_15_1.txt | 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/HTTP/Headers/X-XSS-Protection)
6. [ Mozilla web security guidelines ](https:/... | |
Mmdn_HTTP/CSP_directives_12_9.txt | /en-US/docs/Web/HTTP/Headers/Content-Security-Policy/report-to)
## Help improve MDN
Was this page helpful to you?
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[ Learn how to contribute
](https://github.com/mdn/content/blob/main/CONTRIBUTING.md "This will take you
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This page was last modified on Mar 6, 20... | |
Mmdn_HTTP/HTTP_headers_11_5.txt | 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 Unprocessable Content ` ](/en-US/docs/Web/HTTP/Status/422)
4... | |
Mmdn_HTTP/CSP_directives_14_1.txt | 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 Transport Security (HSTS) ](/en-US/docs/Web/HTTP/Headers/Strict... | |
Mmdn_HTTP/Permissions_Policy_directives_0_1.txt | )
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/HTTP/Head... | |
Mmdn_HTTP/HTTP_headers_24_9.txt | //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 Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .
*[
... | |
Mmdn_HTTP/HTTP_response_status_5_5.txt | cs/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 T... | |
Mmdn_HTTP/Permissions_Policy_directives_14_5.txt | 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 Earl... | |
Mmdn_HTTP/Permissions_Policy_directives_11_4.txt | h-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
136. [... | |
Mmdn_HTTP/Permissions_Policy_directives_23_0.txt | * Skip to main content
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Mmdn_HTTP/HTTP_response_status_14_2.txt | 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/docs/Web/HTTP/Headers/Content-Security-Policy-Repo... | |
Mmdn_HTTP/CSP_directives_9_8.txt | yle-src) ).
CSP version | 3
---|---
Directive type | [ Fetch directive ](/en-US/docs/Glossary/Fetch_directive)
[ ` 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 [ ` style-src ` ](/en-US/docs/W... | |
Mmdn_HTTP/HTTP_response_status_27_7.txt | ia ](/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/HTT... | |
Mmdn_HTTP/Permissions_Policy_directives_33_1.txt | 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/Headers/X-Frame-Options)
5. [ X-XS... | |
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Mmdn_HTTP/HTTP_headers_30_9.txt | legal/terms/mozilla)
* [ Community Participation Guidelines ](https://www.mozilla.org/about/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 2... | |
Mmdn_HTTP/HTTP_request_methods_6_2.txt | 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-Security-Policy-Rep... | |
Mmdn_HTTP/CSP_directives_12_6.txt | aders/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/Headers/Conten... | |
Mmdn_HTTP/Permissions_Policy_directives_24_8.txt | is granted to use the feature. See [ `
Permissions-Policy ` > Syntax ](/en-US/docs/Web/HTTP/Headers/Permissions-
Policy#syntax) for more details.
## Default policy
The default allowlist for ` camera ` is ` self ` .
## Specifications
Specification
---
[ Media Capture and Streams
# permissions-policy-integr... | |
Mmdn_HTTP/HTTP_response_status_39_1.txt | S/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/Permissions_Policy_directives_12_3.txt | 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/HTTP/Headers/... | |
Mmdn_HTTP/HTTP_response_status_22_3.txt | e) 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-Transparency) Experimental
89. [ ` Sec-CH-UA ` ](/en-US/docs/Web/HTTP/Head... | |
Mmdn_HTTP/HTTP_response_status_12_3.txt | refers-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-Transparency) Experimental
89. [ ` Sec-CH-UA ` ](/en-US/... | |
Mmdn_HTTP/HTTP_headers_25_0.txt | * Skip to main content
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Mmdn_HTTP/HTTP_response_status_38_7.txt | cy: 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 ](/e... | |
Mmdn_HTTP/CSP_directives_20_8.txt | ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/connect-src)
* [ ` font-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/font-src)
* [ ` frame-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/frame-src)
* [ ` img-src ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/img-src)
... | |
Mmdn_HTTP/Permissions_Policy_directives_32_7.txt | 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 ](/en-US/docs/Web/HTT... | |
Mmdn_HTTP/HTTP_headers_30_3.txt | s/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-Prefers-Reduced-Motion) Experimental
88. [ ` Sec-... | |
Mmdn_HTTP/HTTP_response_status_29_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_request_methods_0_3.txt | 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-Prefers-Co... | |
Mmdn_HTTP/HTTP_headers_4_0.txt | * Skip to main content
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Mmdn_HTTP/HTTP_headers_28_1.txt | 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) ](/en-US/d... | |
Mmdn_HTTP/HTTP_response_status_42_4.txt | . [ ` 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/HTTP/Headers/X-Forwarded-Host) Non-standard
135. [ ` X-Forwarded-Proto `... | |
Mmdn_HTTP/HTTP_response_status_20_3.txt | ders/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/We... | |
Mmdn_HTTP/HTTP_headers_3_9.txt | F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F369b8ec2c87b6c5b01d1527fddb6810ded3be782%0A*+Document+last+modified%3A+2023-12-16T06%3A56%3A50.000Z%0A%0A%3C%2Fdetails%3E
"This will take you to GitHub to file a new issue.")
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Your blueprint for a better internet.
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Mmdn_HTTP/Permissions_Policy_directives_6_9.txt | -standard
]: Non-standard. Check cross-browser support before using.
*[
Deprecated
]: Deprecated. Not for use in new websites.
*[
Experimental
]: Experi... | |
Mmdn_HTTP/List_of_HTTP_header_fields_9_0.txt | ## See also [ [ edit
](/w/index.php?title=List_of_HTTP_header_fields&action=edit§ion=13 "Edit
section: See also") ]
* [ HTTP header injection ](/wiki/HTTP_header_injection "HTTP header injection")
* [ HTTP ETag ](/wiki/HTTP_ETag "HTTP ETag")
* [ List of HTTP status codes ](/wiki/List_of_HTTP_status_codes ... | |
Mmdn_HTTP/CSP_directives_22_0.txt | * Skip to main content
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Mmdn_HTTP/CSP_directives_4_8.txt |
This directive is not supported in the [ ` <meta> ` ](/en-
US/docs/Web/HTML/Element/meta) element or by the [ ` Content-Security-policy-
Report-Only ` ](/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-
Only) header field.
## Syntax
http
Content-Security-Policy: sandbox;
Content-... | |
Mmdn_HTTP/CSP_directives_12_5.txt | d 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-US/docs/Web/HTTP/Status/425)
... | |
Mmdn_HTTP/HTTP_response_status_17_2.txt | [ ` 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/docs/Web/HTTP/Header... | |
Mmdn_HTTP/Permissions_Policy_directives_19_5.txt | /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/Status/429)
49. [ ` 431 Request... | |
Mmdn_HTTP/HTTP_response_status_7_0.txt | * Skip to main content
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Mmdn_HTTP/Permissions_Policy_directives_10_2.txt | 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)
37. [ ` Cookie ` ](/en-US/docs/Web/HTTP/Head... | |
Mmdn_HTTP/HTTP_headers_5_3.txt | -After)
83. [ ` RTT ` ](/en-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... | |
Mmdn_HTTP/List_of_HTTP_header_fields_2_0.txt | ## General format [ [ edit
](/w/index.php?title=List_of_HTTP_header_fields&action=edit§ion=1 "Edit
section: General format") ]
In HTTP version 1.x, header fields are transmitted after the request line (in
case of a request HTTP message) or the response line (in case of a response
HTTP message), which is the fir... | |
Mmdn_HTTP/HTTP_request_methods_4_5.txt | ctation 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/HTTP/Status... | |
Mmdn_HTTP/CSP_directives_1_2.txt | TTP/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/Web/HTTP... | |
Mmdn_HTTP/HTTP_headers_16_0.txt | * Skip to main content
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* [ Overview / Web Technology Web technology reference for developers ](/en-US/docs/Web)
* [ HTML Structure of content on the web ](/en-US/do... | |
Mmdn_HTTP/Header_Field_Definitions_4_0.txt | ### 14.4 Accept-Language
The Accept-Language request-header field is similar to Accept, but restricts
the set of natural languages that are preferred as a response to the request.
Language tags are defined in section [ 3.10 ](rfc2616-sec3.html#sec3.10) .
Accept-Language = "Accept-Language" ":"
... | |
Mmdn_HTTP/CSP_directives_21_4.txt | ](/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/Web/HTTP/Headers... | |
Mmdn_HTTP/HTTP_response_status_57_3.txt | -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-Prefers-Reduced-Motion)... | |
Mmdn_HTTP/HTTP_headers_4_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/ex... | |
Mmdn_HTTP/HTTP_headers_32_3.txt | perimental
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-UA) Experimental
90. [ ` Sec-CH-UA-Arch ` ](/en-US/docs/Web/HTTP/Headers/Sec-CH-UA-Arch) Experimental
91... | |
Mmdn_HTTP/HTTP_response_status_46_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-Transpor... | |
Mmdn_HTTP/HTTP_headers_33_6.txt | 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/Headers/Content-Security-Policy/trusted-typ... | |
Mmdn_HTTP/Permissions_Policy_directives_8_6.txt | TTP/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/Headers... | |
Mmdn_HTTP/CSP_directives_4_6.txt | cript-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_8_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/HTTP_response_status_30_0.txt | * Skip to main content
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