From 4b1a9203c547c019fc5398082ae19a3f3d4c3efe Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:41:15 -0500 Subject: initial commit --- files/de/web/http/headers/user-agent/index.html | 139 ++++++++++++++++++++++++ 1 file changed, 139 insertions(+) create mode 100644 files/de/web/http/headers/user-agent/index.html (limited to 'files/de/web/http/headers/user-agent') diff --git a/files/de/web/http/headers/user-agent/index.html b/files/de/web/http/headers/user-agent/index.html new file mode 100644 index 0000000000..ceb6e8e533 --- /dev/null +++ b/files/de/web/http/headers/user-agent/index.html @@ -0,0 +1,139 @@ +--- +title: User-Agent +slug: Web/HTTP/Headers/User-Agent +tags: + - HTTP + - NeedsTranslation + - Reference + - TopicStub + - header +translation_of: Web/HTTP/Headers/User-Agent +--- +
{{HTTPSidebar}}
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The User-Agent request header contains a characteristic string that allows the network protocol peers to identify the application type, operating system, software vendor or software version of the requesting software user agent.

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Please read Browser detection using the user agent and why serving different Web pages or services to different browsers is usually a bad idea.

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Header type{{Glossary("Request header")}}
{{Glossary("Forbidden header name")}}no
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Syntax

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User-Agent: <product> / <product-version> <comment>
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+Common format for web browsers:
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+User-Agent: Mozilla/<version> (<system-information>) <platform> (<platform-details>) <extensions>
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Directives

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<product>
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A product identifier
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<product-version>
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A version number of the product.
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<comment>
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Zero or more comments containing sub product information, for example.
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+ +

Firefox UA string

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For more details on Firefox and Gecko based user agent strings, see the Firefox user agent string reference. The UA string of Firefox itself is broken down into four components:

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Mozilla/5.0 (platform; rv:geckoversion) Gecko/geckotrail Firefox/firefoxversion

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Examples

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Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0
+Mozilla/5.0 (Macintosh; Intel Mac OS X x.y; rv:42.0) Gecko/20100101 Firefox/42.0
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Chrome UA string

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The Chrome (or Chromium/blink-based engines) user agent string is similar to the Firefox format. For compatibility, it adds strings like "KHTML, like Gecko" and "Safari".

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Examples

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Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36
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Opera UA string

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The Opera browser is also based on the blink engine, which is why it almost looks the same, but adds "OPR/<version>".

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Examples

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Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.106 Safari/537.36 OPR/38.0.2220.41
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Safari UA string

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In this example, the user agent string is mobile safari version. It contains the word "Mobile".

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Examples

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Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_1 like Mac OS X) AppleWebKit/603.1.30 (KHTML, like Gecko) Version/10.0 Mobile/14E304 Safari/602.1
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Internet Explorer UA string

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Examples

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Mozilla/5.0 (compatible; MSIE 9.0; Windows Phone OS 7.5; Trident/5.0; IEMobile/9.0)
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Crawler and bot UA strings

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Examples

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Googlebot/2.1 (+http://www.google.com/bot.html)
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Specifications

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SpecificationTitle
{{RFC("7231", "User-Agent", "5.5.3")}}Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content
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Browser compatibility

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{{Compat("http.headers.User-Agent")}}

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See also

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