httpstatuses/contents/codes/431.md

---
set: 4
code: 431
title: Request Header Fields Too Large
references:
    "Symfony HTTP Status Constant": "Response::HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE"
---

The server is unwilling to process the request because its header fields are too large. The request MAY be resubmitted after reducing the size of the request header fields.

It can be used both when the set of request header fields in total is too large, and when a single header field is at fault.  In the latter case, the response representation SHOULD specify which header field was too large.

For example:

```
HTTP/1.1 431 Request Header Fields Too Large
Content-Type: text/html

<html>
  <head>
    <title>Request Header Fields Too Large</title>
  </head>
  <body>
    <h1>Request Header Fields Too Large</h1>
    <p>The "Example" header was too large.</p>
  </body>
</html>
```

Responses with the 431 status code MUST NOT be stored by a cache.

---

* Source: [RFC6585 Section 5][1]

[1]: <http://tools.ietf.org/html/rfc6585#section-5>
Adds missing status code files 2015-11-06 22:55:41 +01:00			`---`
			`set: 4`
			`code: 431`
			`title: Request Header Fields Too Large`
Add Symfony HTTP Status Constant references (#48) 2016-04-19 15:19:17 +02:00			`references:`
			`"Symfony HTTP Status Constant": "Response::HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE"`
Adds missing status code files 2015-11-06 22:55:41 +01:00			`---`

Remove markdown line limit (#52) * Removes line length limit from Status Code Markdown This will make the data easier to use when we develop the API, it needs to be consistent, arbitrary new lines (especially in text format) will be a major issue, so some sort of workaround would have to be implemented, easier to simply fix the source files. * Removes line length limit from misc. Markdown files 2016-04-23 02:12:07 +02:00			`The server is unwilling to process the request because its header fields are too large. The request MAY be resubmitted after reducing the size of the request header fields.`
Adds 4xx Client Error class status codes descriptions from latest standards 2015-11-07 05:34:40 +01:00
Remove markdown line limit (#52) * Removes line length limit from Status Code Markdown This will make the data easier to use when we develop the API, it needs to be consistent, arbitrary new lines (especially in text format) will be a major issue, so some sort of workaround would have to be implemented, easier to simply fix the source files. * Removes line length limit from misc. Markdown files 2016-04-23 02:12:07 +02:00			`It can be used both when the set of request header fields in total is too large, and when a single header field is at fault. In the latter case, the response representation SHOULD specify which header field was too large.`
Adds 4xx Client Error class status codes descriptions from latest standards 2015-11-07 05:34:40 +01:00
			`For example:`

			```
			`HTTP/1.1 431 Request Header Fields Too Large`
			`Content-Type: text/html`

			`<html>`
			`<head>`
Fixes indentation in HTML examples 2015-11-09 20:01:11 +01:00			`<title>Request Header Fields Too Large</title>`
Adds 4xx Client Error class status codes descriptions from latest standards 2015-11-07 05:34:40 +01:00			`</head>`
			`<body>`
Fixes indentation in HTML examples 2015-11-09 20:01:11 +01:00			`<h1>Request Header Fields Too Large</h1>`
			`<p>The "Example" header was too large.</p>`
Adds 4xx Client Error class status codes descriptions from latest standards 2015-11-07 05:34:40 +01:00			`</body>`
			`</html>`
			```

			`Responses with the 431 status code MUST NOT be stored by a cache.`

Improves 4xx class status codes with referencing 2015-11-09 02:44:05 +01:00			`---`

			`* Source: [RFC6585 Section 5][1]`
Adds 4xx Client Error class status codes descriptions from latest standards 2015-11-07 05:34:40 +01:00
Add Symfony HTTP Status Constant references (#48) 2016-04-19 15:19:17 +02:00			`[1]: <http://tools.ietf.org/html/rfc6585#section-5>`