* 仕様書 [REFS[ - [25] [CITE@en[Secure Contexts]], [TIME[2020-03-30 22:34:37 +09:00]] - [26] [CITE@en[Secure Contexts]], [TIME[2020-03-30 22:34:37 +09:00]] ]REFS] * ドメイン [FIG(short list)[ [28] [CODE[localhost]] - [CODE[localhost]] - [CODE@en[[[localhost.localdomain]]]] - [CODE[localhost4]] - [CODE[localhost6]] - [CODE[localhost4.localdomain4]] - [CODE[localhost6.localdomain6]] - [CODE[docker.for.mac.localhost]] - [CODE[docker.for.win.localhost]] - [CODE[docker.for.lin.localhost]] ]FIG] * 名前解決規則 [27] [[潜在的に信頼できる起源]]の判定では[[名前解決規則]]の性質が結果に影響します。 [SRC[>>25, >>26]] * 関連 [23] [SEE[ [CODE[127.0.0.1]]、[CODE[::1]] ]] [SEE[ [[特別なドメイン名]] ]] * 歴史 [29] [CITE@en[[[RFC 2606]] - Reserved Top Level DNS Names]], [TIME[2021-03-28T07:19:55.000Z]], [TIME[2021-04-09T08:41:39.119Z]] [1] [CITE@en[RFC 6761 - Special-Use Domain Names]] ( ([TIME[2013-06-27 22:35:13 +09:00]] 版)) [2] かつては [CODE(URI)[file://localhost/]] と [CODE(URI)[file:///]] は同義とされていました。 [FIG(quote)[ [FIGCAPTION[ [3] [CITE@en[RFC 6761 - Special-Use Domain Names]] ([TIME[2015-03-24 01:45:33 +09:00]] 版) ]FIGCAPTION] > Name resolution APIs and libraries SHOULD recognize localhost names as special and SHOULD always return the IP loopback address for address queries and negative responses for all other query types. ]FIG] [4] この規定より事実上全てのシステムで [CODE[[[localhost]]]] は [CODE[[[127.0.0.1]]]] に[[名前解決]]されます。 [FIG(quote)[ [FIGCAPTION[ [5] [CITE@en[MySQL :: MySQL 5.7 Reference Manual :: 4.2.2 Connecting to the MySQL Server]] ([TIME[2015-11-04 19:13:52 +09:00]] 版) ]FIGCAPTION] > On Unix, MySQL programs treat the host name localhost specially, in a way that is likely different from what you expect compared to other network-based programs. For connections to localhost, MySQL programs attempt to connect to the local server by using a Unix socket file. This occurs even if a --port or -P option is given to specify a port number. To ensure that the client makes a TCP/IP connection to the local server, use --host or -h to specify a host name value of 127.0.0.1, or the IP address or name of the local server. You can also specify the connection protocol explicitly, even for localhost, by using the --protocol=TCP option. ]FIG] [6] [CITE@en['''['''secure-contexts''']''' `*.localhost` + DNS]] ( ([[Mike West]]著, [TIME[2016-05-03 19:22:56 +09:00]])) [7] [CITE@en-US[Support | Dell US]] ([[Dell US]]著, [TIME[2016-05-06 00:58:46 +09:00]]) [8] >>7 アクセスすると、なぜか [CODE[http://localhost:8884]] へのアクセスが発生します。 [[JSONP]] を呼び出そうとしているようです。 [TIME[2016-05-05T15:59:13.600Z]] [9] [CITE@en[Exclude 'localhost.' and '.localhost.'.]] ( ([[mikewest]]著, [TIME[2016-05-06 17:51:04 +09:00]])) [10] [CITE@en[Issue 224215 - chromium - Can't access a local webserver anymore - Monorail]] ( ([TIME[2016-06-16 19:30:09 +09:00]])) [FIG(quote)[ [FIGCAPTION[ [11] [CITE@en-US[Chrome incompatibilities - Mozilla | MDN]] ( ([TIME[2016-06-14 10:15:04 +09:00]])) ]FIGCAPTION] > content_security_policy > Firefox does not support: > "http://127.0.0.1" or "http://localhost" as script sources: they must be served over HTTPS. ]FIG] [12] [CITE@en[Rewrite algorithm to handle sandboxes inside 'http://127.0.0.1/']] ([[mikewest]]著, [TIME[2016-07-19 21:08:23 +09:00]]) [FIG(quote)[ [FIGCAPTION[ [13] [CITE[ARIB TR-B39]] ([TIME[2016-07-25 17:01:00 +09:00]]) ]FIGCAPTION] > ベース URL のスキーマ等については特に規定しないが、受信機は、放送及び通信で伝送され > るアプリケーションの両方において、6.1.3.6 に示した形式の URL で参照した場合に、放送 > で伝送されるアプリケーションデータへのアクセス(XMLHttpRequest による取得を含む。) > が可能となるベース URL を返す必要がある。また、少なくともアプリケーションが終了する > まではベース URL は不変でなければならない。 > - ベース URL の例:"http://localhost:/" ]FIG] [14] [CITE@en[`localhost` as Secure Context, take 2 (was Re: CfC: Transition "Secure Contexts" to CR; deadline August 2nd.)]] ([[Mike West]]著, [TIME[2016-09-28 21:24:00 +09:00]]) [15] [CITE@en[draft-west-let-localhost-be-localhost-02 - Let 'localhost' be localhost.]] ([TIME[2016-09-28 17:05:17 +09:00]]) [16] [CITE@en[Dropping the 'localhost' exclusion.]] ([[mikewest]]著, [TIME[2016-11-17 19:14:56 +09:00]]) [FIG(quote)[ [FIGCAPTION[ [17] [CITE@en[Webmention]] ([TIME[2017-01-11 04:06:01 +09:00]]) ]FIGCAPTION] > During the discovery step, if the sender discovers the endpoint is localhost or a loopback IP address (127.0.0.0/8), it should not send the Webmention to that endpoint. ]FIG] [FIG(quote)[ [FIGCAPTION[ [18] [CITE@en[Connecting to the Qlik Engine API ‒ Qlik Sense]] ([TIME[2017-05-25 23:17:34 +09:00]]) ]FIGCAPTION] > After you launch Qlik Sense Desktop and log in, you can connect to the Qlik Engine API using the following URI: > ws://localhost:4848/app/ ]FIG] [19] [CITE@en[Cover localhost names for searchlists.]] ([[mikewest]]著, [TIME[2016-11-19 01:06:03 +09:00]]) [20] [CITE['''['''DNSOP''']''' DNSOP Call for Adoption - draft-west-let-localhost-be-localhost]] ([TIME[2017-09-21 12:50:12 +09:00]]) [FIG(quote)[ [FIGCAPTION[ [21] [CITE@en[Networking features in Docker for Mac | Docker Documentation]] ([TIME[2017-12-29 00:22:26 +09:00]]) ]FIGCAPTION] > I WANT TO CONNECT FROM A CONTAINER TO A SERVICE ON THE HOST > The Mac has a changing IP address (or none if you have no network access). From 17.06 onwards our recommendation is to connect to the special Mac-only DNS name docker.for.mac.localhost which will resolve to the internal IP address used by the host. ]FIG] [FIG(quote)[ [FIGCAPTION[ [22] [CITE@ja[Microsoft Edge でローカルホストにアクセスできない問題を解決する - Browser]] ([TIME[2018-01-08 16:33:48 +09:00]]) ]FIGCAPTION] > 初期状態ではアドレスバーに http://localhost や IP を入力してもローカルホストへのアクセスはできません。 ]FIG] [FIG(quote)[ [FIGCAPTION[ [24] [CITE@en[Strava Developers]] ([TIME[2018-11-15 07:15:08 +09:00]]) ]FIGCAPTION] > redirect_uri > required string, in query URL to which the user will be redirected after authentication. Must be within the callback domain specified by the application. localhost and 127.0.0.1 are white-listed. ]FIG] [30] [CITE@ja[意外と多い localhost の DMCA 削除要請、Google は1回だけ削除していた | スラド YRO]] ([TIME[2021-08-12T01:15:47.000Z]]) [31] [CITE@ja[ローカルホストリソース・パーミッション | Brave Browser]], [TIME[2023-06-29T13:22:19.000Z]], [TIME[2023-07-05T07:53:23.421Z]] [32] [CITE@en[adblock-lists/brave-lists/localhost-permission-allow-list.txt at master · brave/adblock-lists · GitHub]], [TIME[2023-07-05T07:54:18.000Z]] [33] [CITE@en[171934 – Don't treat loopback addresses (127.0.0.0/8, ::1/128, localhost, .localhost) as mixed content]], [TIME[2023-07-05T08:00:19.000Z]] [34] [CITE@en[feat: *.localhost subdomain gateway support with http proxy by lidel · Pull Request #853 · ipfs/ipfs-companion · GitHub]], [TIME[2023-08-10T03:09:15.000Z]]