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38 lines
1.4 KiB
Markdown
38 lines
1.4 KiB
Markdown
---
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set: 2
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code: 203
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title: Non-authoritative Information
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references:
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"Rails HTTP Status Symbol": ":non_authoritative_information"
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---
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The request was successful but the enclosed payload has been modified from that
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of the origin server's [200 OK](/200) response by a transforming
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proxy<sup>[1](#ref-1)</sup>.
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This status code allows the proxy to notify recipients when a transformation has
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been applied, since that knowledge might impact later decisions regarding the
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content. For example, future cache validation requests for the content might
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only be applicable along the same request path (through the same proxies).
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The 203 response is similar to the Warning code of 214 Transformation
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Applied<sup>[2](#ref-2)</sup>, which has the advantage of being applicable to
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responses with any status code.
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A 203 response is cacheable by default; i.e., unless otherwise indicated by the
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method definition or explicit cache controls<sup>[3](#ref-3)</sup>.
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---
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* <span id="ref-1"><sup>1</sup> Transformations
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[RFC7230 Section 5.7.2][2]</span>
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* <span id="ref-2"><sup>2</sup> Warning [RFC7234 Section 5.5][3]</span>
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* <span id="ref-3"><sup>3</sup> Calculating Heuristic Freshness
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[RFC7234 Section 4.2.2][4]</span>
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* Source: [RFC7231 Section 6.3.4][1]
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[1]: <http://tools.ietf.org/html/rfc7231#section-6.3.4>
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[2]: <http://tools.ietf.org/html/rfc7230#section-5.7.2>
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[3]: <http://tools.ietf.org/html/rfc7234#section-5.5>
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[4]: <http://tools.ietf.org/html/rfc7234#section-4.2.2>
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