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/*
This file is part of TALER
(C) 2014 GNUnet e.V.
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with
TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file taler-mint-httpd_responses.c
* @brief API for generating the various replies of the mint; these
* functions are called TALER_MINT_reply_ and they generate
* and queue MHD response objects for a given connection.
* @author Florian Dold
* @author Benedikt Mueller
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler-mint-httpd_responses.h"
/**
* Send JSON object as response. Decreases the reference count of the
* JSON object.
*
* @param connection the MHD connection
* @param json the json object
* @param response_code the http response code
* @return MHD result code
*/
int
TALER_MINT_reply_json (struct MHD_Connection *connection,
json_t *json,
unsigned int response_code)
{
struct MHD_Response *resp;
char *json_str;
int ret;
json_str = json_dumps (json, JSON_INDENT(2));
json_decref (json);
resp = MHD_create_response_from_buffer (strlen (json_str), json_str,
MHD_RESPMEM_MUST_FREE);
if (NULL == resp)
return MHD_NO;
(void) MHD_add_response_header (resp,
MHD_HTTP_HEADER_CONTENT_TYPE,
"application/json");
ret = MHD_queue_response (connection, response_code, resp);
MHD_destroy_response (resp);
return ret;
}
/**
* Function to call to handle the request by building a JSON
* reply from a format string and varargs.
*
* @param connection the MHD connection to handle
* @param response_code HTTP response code to use
* @param fmt format string for pack
* @param ... varargs
* @return MHD result code
*/
int
TALER_MINT_reply_json_pack (struct MHD_Connection *connection,
unsigned int response_code,
const char *fmt,
...)
{
json_t *json;
va_list argp;
va_start (argp, fmt);
json = json_vpack_ex (NULL, 0, fmt, argp);
va_end (argp);
if (NULL == json)
return MHD_NO;
return TALER_MINT_reply_json (connection,
json,
response_code);
}
/**
* Send a response indicating an invalid argument.
*
* @param connection the MHD connection to use
* @param param_name the parameter that is invalid
* @return a MHD result code
*/
int
TALER_MINT_reply_arg_invalid (struct MHD_Connection *connection,
const char *param_name)
{
json_t *json;
json = json_pack ("{ s:s, s:s }",
"error",
"invalid parameter",
"parameter",
param_name);
return TALER_MINT_reply_json (connection,
json,
MHD_HTTP_BAD_REQUEST);
}
/**
* Send a response indicating a missing argument.
*
* @param connection the MHD connection to use
* @param param_name the parameter that is missing
* @return a MHD result code
*/
int
TALER_MINT_reply_arg_missing (struct MHD_Connection *connection,
const char *param_name)
{
json_t *json;
json = json_pack ("{ s:s, s:s }",
"error",
"missing parameter",
"parameter",
param_name);
return TALER_MINT_reply_json (connection,
json,
MHD_HTTP_BAD_REQUEST);
}
/**
* Send a response indicating an internal error.
*
* @param connection the MHD connection to use
* @param hint hint about the internal error's nature
* @return a MHD result code
*/
int
TALER_MINT_reply_internal_error (struct MHD_Connection *connection,
const char *hint)
{
json_t *json;
json = json_pack ("{ s:s, s:s }",
"error",
"internal error",
"hint",
hint);
return TALER_MINT_reply_json (connection,
json,
MHD_HTTP_BAD_REQUEST);
}
/**
* Send a response indicating that the request was too big.
*
* @param connection the MHD connection to use
* @return a MHD result code
*/
int
TALER_MINT_reply_request_too_large (struct MHD_Connection *connection)
{
struct MHD_Response *resp;
int ret;
resp = MHD_create_response_from_buffer (0,
NULL,
MHD_RESPMEM_PERSISTENT);
if (NULL == resp)
return MHD_NO;
ret = MHD_queue_response (connection,
MHD_HTTP_REQUEST_ENTITY_TOO_LARGE,
resp);
MHD_destroy_response (resp);
return ret;
}
/**
* Send a response indicating that the JSON was malformed.
*
* @param connection the MHD connection to use
* @return a MHD result code
*/
int
TALER_MINT_reply_invalid_json (struct MHD_Connection *connection)
{
return TALER_MINT_reply_json_pack (connection,
MHD_HTTP_BAD_REQUEST,
"{s:s}",
"error",
"invalid json");
}
/* end of taler-mint-httpd_responses.c */
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