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auditor add denomination client logic

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This commit is contained in:
Christian Grothoff 2020-11-25 22:02:37 +01:00
parent 19ca32693a
commit 7930103d30
No known key found for this signature in database
GPG Key ID: 939E6BE1E29FC3CC
2 changed files with 151 additions and 18 deletions
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1
src/lib/Makefile.am
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@ -21,6 +21,7 @@ libtalerexchange_la_LDFLAGS = \
-version-info 4:0:0 \
-no-undefined
libtalerexchange_la_SOURCES = \
exchange_api_auditor_add_denomination.c \
exchange_api_curl_defaults.c exchange_api_curl_defaults.h \
exchange_api_common.c \
exchange_api_handle.c exchange_api_handle.h \

168
src/lib/exchange_api_auditor_add_denomination.c
View File

@ -24,11 +24,10 @@
#include <gnunet/gnunet_curl_lib.h>
#include "taler_exchange_service.h"
#include "taler_signatures.h"
#include "taler_curl_lib.h"
#include "taler_json_lib.h"
/**
* @brief Handle for a POST /auditor/$AUDITOR_PUB/$H_DENOM_PUB request.
*/
struct TALER_EXCHANGE_AuditorAddDenominationHandle
{
@ -37,6 +36,11 @@ struct TALER_EXCHANGE_AuditorAddDenominationHandle
*/
char *url;
/**
* Minor context that holds body and headers.
*/
struct TALER_CURL_PostContext post_ctx;
/**
* Handle for the request.
*/
@ -60,17 +64,67 @@ struct TALER_EXCHANGE_AuditorAddDenominationHandle
/**
* Provide auditor signatures for a denomination to the exchange.
* Function called when we're done processing the
* HTTP POST /auditor/$AUDITOR_PUB/$H_DENOM_PUB request.
*
* @param ctx the context
* @param url HTTP base URL for the exchange
* @param h_denom_pub hash of the public key of the denomination
* @param auditor_pub public key of the auditor
* @param auditor_sig signature of the auditor
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
* @param cls the `struct TALER_EXCHANGE_AuditorAddDenominationHandle *`
* @param response_code HTTP response code, 0 on error
* @param response response body, NULL if not in JSON
*/
static void
handle_auditor_add_denomination_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_EXCHANGE_AuditorAddDenominationHandle *ah = cls;
const json_t *json = response;
struct TALER_EXCHANGE_HttpResponse hr = {
.http_status = (unsigned int) response_code,
.reply = json
};
ah->job = NULL;
switch (response_code)
{
case MHD_HTTP_NO_CONTENT:
break;
case MHD_HTTP_FORBIDDEN:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
break;
case MHD_HTTP_NOT_FOUND:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
break;
case MHD_HTTP_GONE:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
break;
case MHD_HTTP_PRECONDITION_FAILED:
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
break;
default:
/* unexpected response code */
GNUNET_break_op (0);
hr.ec = TALER_JSON_get_error_code (json);
hr.hint = TALER_JSON_get_error_hint (json);
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Unexpected response code %u/%d\n",
(unsigned int) response_code,
(int) hr.ec);
break;
}
if (NULL != ah->cb)
{
ah->cb (ah->cb_cls,
&hr);
ah->cb = NULL;
}
TALER_EXCHANGE_add_auditor_denomination_cancel (ah);
}
struct TALER_EXCHANGE_AuditorAddDenominationHandle *
TALER_EXCHANGE_add_auditor_denomination (
struct GNUNET_CURL_Context *ctx,
@ -79,14 +133,91 @@ TALER_EXCHANGE_add_auditor_denomination (
const struct TALER_AuditorPublicKeyP *auditor_pub,
const struct TALER_AuditorSignatureP *auditor_sig,
TALER_EXCHANGE_AuditorAddDenominationCallback cb,
void *cb_cls);
void *cb_cls)
{
struct TALER_EXCHANGE_AuditorAddDenominationHandle *ah;
CURL *eh;
json_t *body;
ah = GNUNET_new (struct TALER_EXCHANGE_AuditorAddDenominationHandle);
ah->cb = cb;
ah->cb_cls = cb_cls;
ah->ctx = ctx;
{
char apub_str[sizeof (*auditor_pub) * 2];
char denom_str[sizeof (*h_denom_pub) * 2];
char arg_str[sizeof (apub_str) + sizeof (denom_str) + 32];
char *end;
end = GNUNET_STRINGS_data_to_string (auditor_pub,
sizeof (*auditor_pub),
apub_str,
sizeof (apub_str));
*end = '\0';
end = GNUNET_STRINGS_data_to_string (h_denom_pub,
sizeof (*h_denom_pub),
denom_str,
sizeof (denom_str));
*end = '\0';
GNUNET_snprintf (arg_str,
sizeof (arg_str),
"auditors/%s/%s",
apub_str,
denom_str);
ah->url = TALER_url_join (url,
arg_str,
NULL);
}
if (NULL == ah->url)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not construct request URL.\n");
GNUNET_free (ah);
return NULL;
}
body = json_pack ("{s:o}",
"auditor_sig",
GNUNET_JSON_from_data_auto (auditor_sig));
if (NULL == body)
{
GNUNET_break (0);
GNUNET_free (ah->url);
GNUNET_free (ah);
return NULL;
}
eh = curl_easy_init ();
if (GNUNET_OK !=
TALER_curl_easy_post (&ah->post_ctx,
eh,
body))
{
GNUNET_break (0);
json_decref (body);
GNUNET_free (ah->url);
GNUNET_free (eh);
return NULL;
}
json_decref (body);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Requesting URL '%s'\n",
ah->url);
GNUNET_assert (CURLE_OK == curl_easy_setopt (eh,
CURLOPT_URL,
ah->url));
ah->job = GNUNET_CURL_job_add2 (ctx,
eh,
ah->post_ctx.headers,
&handle_auditor_add_denomination_finished,
ah);
if (NULL == ah->job)
{
TALER_EXCHANGE_add_auditor_denomination_cancel (ah);
return NULL;
}
return ah;
}
/**
* Cancel #TALER_EXCHANGE_add_auditor_denomination() operation.
*
* @param ah handle of the operation to cancel
*/
void
TALER_EXCHANGE_add_auditor_denomination_cancel (
struct TALER_EXCHANGE_AuditorAddDenominationHandle *ah)
@ -96,6 +227,7 @@ TALER_EXCHANGE_add_auditor_denomination_cancel (
GNUNET_CURL_job_cancel (ah->job);
ah->job = NULL;
}
TALER_curl_easy_post_finished (&ah->post_ctx);
GNUNET_free (ah->url);
GNUNET_free (ah);
}