2015-11-06 21:39:33 +01:00
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---
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set: 5
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code: 503
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title: Service Unavailable
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2015-11-07 06:05:36 +01:00
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references:
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"Rails HTTP Status Symbol": ":service_unavailable"
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2016-01-27 23:08:33 +01:00
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"Go HTTP Status Constant": "http.StatusServiceUnavailable"
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2015-11-06 21:39:33 +01:00
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---
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2015-11-09 02:54:09 +01:00
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The server is currently unable to handle the request due to a temporary overload
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or scheduled maintenance, which will likely be alleviated after some delay.
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2015-11-07 06:48:31 +01:00
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2015-11-09 02:54:09 +01:00
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The server MAY send a Retry-After header field<sup>[1](#ref-1)</sup> to suggest
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an appropriate amount of time for the client to wait before retrying the
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2015-11-07 06:48:31 +01:00
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request.
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2015-11-07 06:05:36 +01:00
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Note: The existence of the 503 status code does not imply that a server has to
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use it when becoming overloaded. Some servers might simply refuse the
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connection.
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2015-11-09 02:54:09 +01:00
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---
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* <span id="ref-1"><sup>1</sup> Retry-After [RFC7231 Section 7.1.3][2]</span>
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* Source: [RFC7231 Section 6.6.4][1]
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2015-11-07 06:05:36 +01:00
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[1]: <http://tools.ietf.org/html/rfc7231#section-6.6.4>
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2016-01-27 23:08:33 +01:00
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[2]: <http://tools.ietf.org/html/rfc7231#section-7.1.3>
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