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Document known client-server error codes

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Covers part of https://github.com/matrix-org/matrix-doc/issues/603 (updating all the endpoints is being done as a separate PR/commit). 

Reference: 74854a9719/synapse/api/errors.py (L30-L61)
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Travis Ralston 2018-08-30 23:05:51 -06:00
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specification/client_server_api.rst
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@ -102,12 +102,17 @@ error, but the keys ``error`` and ``errcode`` MUST always be present.
Some standard error codes are below:
The common error codes are:
:``M_FORBIDDEN``:
Forbidden access, e.g. joining a room without permission, failed login.
:``M_UNKNOWN_TOKEN``:
The access token specified was not recognised.
:``M_MISSING_TOKEN``:
No access token was specified for the request.
:``M_BAD_JSON``:
Request contained valid JSON, but it was malformed in some way, e.g. missing
required keys, invalid values for keys.
@ -122,7 +127,16 @@ Some standard error codes are below:
Too many requests have been sent in a short period of time. Wait a while then
try again.
Some requests have unique error codes:
:``M_UNKNOWN``:
An unknown error has occurred.
Other error codes the client might encounter are:
:``M_UNRECOGNIZED``:
The server did not understand the request.
:``M_UNAUTHORIZED``:
The request was not correctly authorized. Usually due to login failures.
:``M_USER_IN_USE``:
Encountered when trying to register a user ID which has been taken.
@ -145,6 +159,13 @@ Some requests have unique error codes:
:``M_THREEPID_NOT_FOUND``:
Sent when a threepid given to an API cannot be used because no record matching the threepid was found.
:``M_THREEPID_AUTH_FAILED``:
Authentication could not be performed on the third party identifier.
:``M_THREEPID_DENIED``:
The server does not permit this third party identifier. This may happen if the server only
permits, for example, email addresses from a particular domain.
:``M_SERVER_NOT_TRUSTED``:
The client's request used a third party server, eg. ID server, that this server does not trust.
@ -155,6 +176,38 @@ Some requests have unique error codes:
The client attempted to join a room that has a version the server does not support. Inspect the
``room_version`` property of the error response for the room's version.
:``M_BAD_STATE``:
The state change requested cannot be performed, such as attempting to unban
a user who is not banned.
:``M_GUEST_ACCESS_FORBIDDEN``:
The room or resource does not permit guests to access it.
:``M_CAPTCHA_NEEDED``:
A Captcha is required to complete the request.
:``M_CAPTCHA_INVALID``:
The Captcha provided did not match what was expected.
:``M_MISSING_PARAM``:
A required parameter was missing from the request.
:``M_INVALID_PARAM``:
A parameter that was specified has the wrong value. For example, the server
expected an integer and instead received a string.
:``M_TOO_LARGE``:
The request or entity was too large.
:``M_EXCLUSIVE``:
The resource being requested is reserved by an application service, or the
application service making the request has not created the resource.
.. TODO: More error codes (covered by other issues)
.. * M_CONSENT_NOT_GIVEN - GDPR: https://github.com/matrix-org/matrix-doc/issues/1512
.. * M_CANNOT_LEAVE_SERVER_NOTICE_ROOM - GDPR: https://github.com/matrix-org/matrix-doc/issues/1254
.. * M_RESOURCE_LIMIT_EXCEEDED - Limits: https://github.com/matrix-org/matrix-doc/issues/1504
.. _sect:txn_ids:
The client-server API typically uses ``HTTP PUT`` to submit requests with a