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/*
This file is part of TALER
Copyright (C) 2015, 2016, 2017 GNUnet e.V.
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>
*/
/**
* @file bank-lib/bank_api_common.c
* @brief Common functions for the bank API
* @author Christian Grothoff
*/
#include "platform.h"
#include "bank_api_common.h"
/**
* Append HTTP key-value pair to curl header list.
*
* @param hdr list to append to, can be NULL
* @param key key to append
* @param value value to append
* @return new list, NULL on error
*/
static struct curl_slist *
append (struct curl_slist *hdr,
const char *key,
const char *value)
{
char *str;
struct curl_slist *ret;
GNUNET_asprintf (&str,
"%s: %s",
key,
value);
ret = curl_slist_append (hdr,
str);
GNUNET_free (str);
if (NULL == ret)
{
GNUNET_break (0);
curl_slist_free_all (hdr);
return NULL;
}
return ret;
}
/**
* Build authentication header from @a auth.
*
* @param auth authentication data to use.
*
* @return NULL on error, otherwise curl headers to use.
*/
struct curl_slist *
TALER_BANK_make_auth_header_
(const struct TALER_BANK_AuthenticationData *auth)
{
struct curl_slist *authh;
switch (auth->method)
{
case TALER_BANK_AUTH_NONE:
return NULL;
case TALER_BANK_AUTH_BASIC:
authh = append (NULL,
"X-Taler-Bank-Username",
auth->details.basic.username);
if (NULL == authh)
return NULL;
authh = append (authh,
"X-Taler-Bank-Password",
auth->details.basic.password);
return authh;
}
return NULL;
}
/**
* Obtain the URL to use for an API request.
*
* @param u base URL of the bank.
* @param path Taler API path (i.e. "/history").
*
* @return the full URL to use with cURL, must be
* freed by the caller.
*/
char *
TALER_BANK_path_to_url_ (const char *u,
const char *path)
{
char *url;
if ( ('/' == path[0]) &&
(0 < strlen (u)) &&
('/' == u[strlen (u) - 1]) )
path++; /* avoid generating URL with "//" from concat */
GNUNET_asprintf (&url,
"%s%s",
u,
path);
return url;
}
/**
* Parse error code given in @a json.
*
* @param json the json to parse.
*
* @return error code, or #TALER_EC_INVALID if not found.
*/
enum TALER_ErrorCode
TALER_BANK_parse_ec_ (const json_t *json)
{
uint32_t ec;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_uint32 ("ec",
&ec),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (json,
spec,
NULL, NULL))
{
GNUNET_break_op (0);
return TALER_EC_INVALID;
}
return (enum TALER_ErrorCode) ec;
}
/* end of bank_api_common.c */
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