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Add Filter API to validate filters and process events.

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This commit is contained in:
Jordan Bancino 2023-06-18 02:53:06 +00:00
parent f9e1250d47
commit 861d4146c0
4 changed files with 224 additions and 11 deletions
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2
TODO.txt
View file

@ -34,6 +34,8 @@ Milestone: v0.4.0
[ ] Refactor MatrixErrorCreate() to take a custom message.
This will make debugging a lot easier.
[ ] Make sure admin registration token is printed to log, not stdout.
Unless they are the same, of course.
Milestone: v0.5.0
-----------------

112
src/Filter.c Normal file
View file

@ -0,0 +1,112 @@
/*
* Copyright (C) 2022-2023 Jordan Bancino <@jordan:bancino.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <Routes.h>
#include <string.h>
#include <HashMap.h>
#include <Memory.h>
#include <User.h>
#include <Json.h>
#include <Str.h>
static HashMap *
ValidateRoomFilter(HashMap *json)
{
return NULL;
}
static HashMap *
ValidateEventFields(Array *fields)
{
return NULL;
}
static HashMap *
ValidateEventFormat(char *fmt)
{
return NULL;
}
static HashMap *
ValidateEventFilter(HashMap *json)
{
JsonValue *val;
val = HashMapGet(json, "limit");
if (val)
{
if (JsonValueType(val) == JSON_INTEGER)
{
long limit = JsonValueAsInteger(val);
if (limit <= 0 || limit > 100)
{
return MatrixErrorCreate(M_BAD_JSON);
}
}
else
{
return MatrixErrorCreate(M_BAD_JSON);
}
}
return NULL;
}
HashMap *
FilterValidate(HashMap *json)
{
JsonValue *val;
HashMap *response = NULL;
#define VALIDATE(key, type, func, param) \
val = HashMapGet(json, key); \
if (val) \
{ \
if (JsonValueType(val) == type) \
{ \
response = func(param); \
if (response) \
{ \
goto finish; \
} \
} \
else \
{ \
return MatrixErrorCreate(M_BAD_JSON); \
} \
}
VALIDATE("account_data", JSON_OBJECT, ValidateEventFilter, JsonValueAsObject(val));
VALIDATE("event_fields", JSON_ARRAY, ValidateEventFields, JsonValueAsArray(val));
VALIDATE("event_format", JSON_STRING, ValidateEventFormat, JsonValueAsString(val));
VALIDATE("presence", JSON_OBJECT, ValidateEventFilter, JsonValueAsObject(val));
VALIDATE("room", JSON_OBJECT, ValidateRoomFilter, JsonValueAsObject(val));
#undef VALIDATE
finish:
return response;
}

65
src/Routes/RouteFilter.c
View file

@ -23,14 +23,17 @@
*/
#include <Routes.h>
#include <string.h>
#include <HashMap.h>
#include <Memory.h>
#include <User.h>
#include <Json.h>
#include <Str.h>
#include <User.h>
#include <Filter.h>
#include <string.h>
static char *
GetServerName(Db *db)
{
@ -55,6 +58,7 @@ ROUTE_IMPL(RouteFilter, path, argp)
RouteArgs *args = argp;
Db *db = args->matrixArgs->db;
HashMap *request = NULL;
HashMap *response = NULL;
User *user = NULL;
@ -101,13 +105,6 @@ ROUTE_IMPL(RouteFilter, path, argp)
goto finish;
}
if (!StrEquals(id->localpart, UserGetName(user)))
{
HttpResponseStatus(args->context, HTTP_UNAUTHORIZED);
response = MatrixErrorCreate(M_INVALID_PARAM);
goto finish;
}
user = UserAuthenticate(db, token);
if (!user)
{
@ -116,6 +113,13 @@ ROUTE_IMPL(RouteFilter, path, argp)
goto finish;
}
if (!StrEquals(id->localpart, UserGetName(user)))
{
HttpResponseStatus(args->context, HTTP_UNAUTHORIZED);
response = MatrixErrorCreate(M_INVALID_PARAM);
goto finish;
}
if (ArraySize(path) == 2 && HttpRequestMethodGet(args->context) == HTTP_GET)
{
DbRef *ref = DbLock(db, 3, "filters", UserGetName(user), ArrayGet(path, 1));
@ -132,8 +136,46 @@ ROUTE_IMPL(RouteFilter, path, argp)
}
else if (ArraySize(path) == 1 && HttpRequestMethodGet(args->context) == HTTP_POST)
{
/* TODO */
response = MatrixErrorCreate(M_UNKNOWN);
DbRef *ref;
char *filterId;
request = JsonDecode(HttpServerStream(args->context));
if (!request)
{
HttpResponseStatus(args->context, HTTP_BAD_REQUEST);
response = MatrixErrorCreate(M_NOT_JSON);
goto finish;
}
response = FilterValidate(request);
if (response)
{
goto finish;
}
filterId = StrRandom(12);
if (!filterId)
{
HttpResponseStatus(args->context, HTTP_INTERNAL_SERVER_ERROR);
response = MatrixErrorCreate(M_UNKNOWN);
goto finish;
}
ref = DbCreate(db, 3, "filters", UserGetName(user), filterId);
if (!ref)
{
Free(filterId);
HttpResponseStatus(args->context, HTTP_INTERNAL_SERVER_ERROR);
response = MatrixErrorCreate(M_UNKNOWN);
goto finish;
}
DbJsonSet(ref, request);
DbUnlock(db, ref);
response = HashMapCreate();
HashMapSet(response, "filter_id", JsonValueString(filterId));
Free(filterId);
}
else
{
@ -145,5 +187,6 @@ finish:
Free(serverName);
UserIdFree(id);
UserUnlock(user);
JsonFree(request);
return response;
}

56
src/include/Filter.h Normal file
View file

@ -0,0 +1,56 @@
/*
* Copyright (C) 2022-2023 Jordan Bancino <@jordan:bancino.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef TELODENDRIA_FILTER_H
#define TELODENDRIA_FILTER_H
/***
* @Nm Filter
* @Nd Validate JSON filters and apply them to events.
* @Dd June 17 2023
*
* The Matrix Client-Server API defines a mechanism for defining
* filters and applying them to certain endpoints. This API allows
* those filters to be validated and applied to events.
*/
/**
* Validate a JSON filter as provided by a client. This function
* takes in a filter and returns a JSON response if a validation
* error occurs. If an error occurs, the response should be returned
* to the client. If no error occurs, then NULL will be returned and
* the caller may proceed with the assumption that the filter is
* valid.
*/
extern HashMap *
FilterValidate(HashMap *);
/**
* Apply the given JSON filter to the given event, returning a
* new event JSON with the filter applied, or NULL if the event
* is excluded totally by the rules of the filter.
*/
extern HashMap *
FilterEvent(HashMap *, HashMap *);
#endif /* TELODENDRIA_FILTER_H */