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authorChristian Grothoff <christian@grothoff.org>2015-07-01 00:18:01 +0200
committerChristian Grothoff <christian@grothoff.org>2015-07-01 00:18:01 +0200
commit01b2a257b1add6809ffa734b2fe6bc9ac87f5477 (patch)
tree8c7f730fc7351d334209e6a395b91fb1c9691409 /src
parentf948a10f712ebd6f52182dc4bf71deee1c45b35f (diff)
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implement C API for /admin/add/incoming
Diffstat (limited to 'src')
-rw-r--r--src/include/taler_mint_service.h88
-rw-r--r--src/mint-lib/Makefile.am1
-rw-r--r--src/mint-lib/mint_api_admin.c334
-rw-r--r--src/mint/taler-mint-httpd_admin.c152
-rw-r--r--src/mint/taler-mint-httpd_admin.h46
5 files changed, 609 insertions, 12 deletions
diff --git a/src/include/taler_mint_service.h b/src/include/taler_mint_service.h
index 0e79a5f73..6edd1e428 100644
--- a/src/include/taler_mint_service.h
+++ b/src/include/taler_mint_service.h
@@ -363,12 +363,13 @@ typedef void
/**
- * Submit a deposit permission to the mint and get the mint's response.
- * Note that while we return the response verbatim to the caller for
- * further processing, we do already verify that the response is
- * well-formed (i.e. that signatures included in the response are all
- * valid). If the mint's reply is not well-formed, we return an
- * HTTP status code of zero to @a cb.
+ * Submit a deposit permission to the mint and get the mint's
+ * response. This API is typically used by a merchant. Note that
+ * while we return the response verbatim to the caller for further
+ * processing, we do already verify that the response is well-formed
+ * (i.e. that signatures included in the response are all valid). If
+ * the mint's reply is not well-formed, we return an HTTP status code
+ * of zero to @a cb.
*
* We also verify that the @a coin_sig is valid for this deposit
* request, and that the @a ub_sig is a valid signature for @a
@@ -564,11 +565,12 @@ typedef void
/**
- * Withdraw a coin from the mint using a /withdraw/sign request. Note
- * that to ensure that no money is lost in case of hardware failures,
- * the caller must have committed (most of) the arguments to disk
- * before calling, and be ready to repeat the request with the same
- * arguments in case of failures.
+ * Withdraw a coin from the mint using a /withdraw/sign request. This
+ * API is typically used by a wallet. Note that to ensure that no
+ * money is lost in case of hardware failures, the caller must have
+ * committed (most of) the arguments to disk before calling, and be
+ * ready to repeat the request with the same arguments in case of
+ * failures.
*
* @param mint the mint handle; the mint must be ready to operate
* @param pk kind of coin to create
@@ -578,7 +580,7 @@ typedef void
* caller must have committed this value to disk before the call (with @a pk)
* @param res_cb the callback to call when the final result for this request is available
* @param res_cb_cls closure for the above callback
- * @return #GNUNET_OK on success, #GNUNET_SYSERR
+ * @return NULL
* if the inputs are invalid (i.e. denomination key not with this mint).
* In this case, the callback is not called.
*/
@@ -602,5 +604,67 @@ void
TALER_MINT_withdraw_sign_cancel (struct TALER_MINT_WithdrawSignHandle *sign);
+/* ********************* /admin/add/incoming *********************** */
+
+
+
+/**
+ * @brief A /admin/add/incoming Handle
+ */
+struct TALER_MINT_AdminAddIncomingHandle;
+
+
+/**
+ * Callbacks of this type are used to serve the result of submitting
+ * information about an incoming transaction to a mint.
+ *
+ * @param cls closure
+ * @param http_status HTTP response code, #MHD_HTTP_OK (200) for successful status request
+ * 0 if the mint's reply is bogus (fails to follow the protocol)
+ * @param full_response full response from the mint (for logging, in case of errors)
+ */
+typedef void
+(*TALER_MINT_AdminAddIncomingResultCallback) (void *cls,
+ unsigned int http_status,
+ json_t *full_response);
+
+
+/**
+ * Notify the mint that we have received an incoming transaction
+ * which fills a reserve. Note that this API is an administrative
+ * API and thus not accessible to typical mint clients, but only
+ * to the operators of the mint.
+ *
+ * @param mint the mint handle; the mint must be ready to operate
+ * @param reserve_pub public key of the reserve
+ * @param amount amount that was deposited
+ * @param execution_date when did we receive the amount
+ * @param wire wire details
+ * @param res_cb the callback to call when the final result for this request is available
+ * @param res_cb_cls closure for the above callback
+ * @return NULL
+ * if the inputs are invalid (i.e. invalid amount).
+ * In this case, the callback is not called.
+ */
+struct TALER_MINT_AdminAddIncomingHandle *
+TALER_MINT_admin_add_incoming (struct TALER_MINT_Handle *mint,
+ const struct TALER_ReservePublicKeyP *reserve_pub,
+ const struct TALER_Amount *amount,
+ const struct GNUNET_TIME_Absolute execution_date,
+ const json_t *wire,
+ TALER_MINT_AdminAddIncomingResultCallback res_cb,
+ void *res_cb_cls);
+
+
+/**
+ * Cancel an add incoming. This function cannot be used on a request
+ * handle if a response is already served for it.
+ *
+ * @param sign the admin add incoming request handle
+ */
+void
+TALER_MINT_admin_add_incoming_cancel (struct TALER_MINT_AdminAddIncomingHandle *aai);
+
+
#endif /* _TALER_MINT_SERVICE_H */
diff --git a/src/mint-lib/Makefile.am b/src/mint-lib/Makefile.am
index f365b3f1f..edd26a025 100644
--- a/src/mint-lib/Makefile.am
+++ b/src/mint-lib/Makefile.am
@@ -17,6 +17,7 @@ libtalermint_la_SOURCES = \
mint_api_context.c mint_api_context.h \
mint_api_json.c mint_api_json.h \
mint_api_handle.c mint_api_handle.h \
+ mint_api_admin.c \
mint_api_deposit.c \
mint_api_withdraw.c
diff --git a/src/mint-lib/mint_api_admin.c b/src/mint-lib/mint_api_admin.c
new file mode 100644
index 000000000..c058cdcfe
--- /dev/null
+++ b/src/mint-lib/mint_api_admin.c
@@ -0,0 +1,334 @@
+/*
+ This file is part of TALER
+ Copyright (C) 2014, 2015 Christian Grothoff (and other contributing authors)
+
+ 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, If not, see
+ <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file mint-lib/mint_api_admin.c
+ * @brief Implementation of the /admin/ requests of the mint's HTTP API
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <curl/curl.h>
+#include <jansson.h>
+#include <microhttpd.h> /* just for HTTP status codes */
+#include <gnunet/gnunet_util_lib.h>
+#include "taler_mint_service.h"
+#include "mint_api_json.h"
+#include "mint_api_context.h"
+#include "mint_api_handle.h"
+#include "taler_signatures.h"
+
+
+/**
+ * Print JSON parsing related error information
+ */
+#define JSON_WARN(error) \
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, \
+ "JSON parsing failed at %s:%u: %s (%s)", \
+ __FILE__, __LINE__, error.text, error.source)
+
+
+/**
+ * @brief An admin/add/incoming Handle
+ */
+struct TALER_MINT_AdminAddIncomingHandle
+{
+
+ /**
+ * The connection to mint this request handle will use
+ */
+ struct TALER_MINT_Handle *mint;
+
+ /**
+ * The url for this request.
+ */
+ char *url;
+
+ /**
+ * JSON encoding of the request to POST.
+ */
+ char *json_enc;
+
+ /**
+ * Handle for the request.
+ */
+ struct MAC_Job *job;
+
+ /**
+ * HTTP headers for the request.
+ */
+ struct curl_slist *headers;
+
+ /**
+ * Function to call with the result.
+ */
+ TALER_MINT_AdminAddIncomingResultCallback cb;
+
+ /**
+ * Closure for @a cb.
+ */
+ void *cb_cls;
+
+ /**
+ * Download buffer
+ */
+ void *buf;
+
+ /**
+ * The size of the download buffer
+ */
+ size_t buf_size;
+
+ /**
+ * Error code (based on libc errno) if we failed to download
+ * (i.e. response too large).
+ */
+ int eno;
+
+};
+
+
+/**
+ * Function called when we're done processing the
+ * HTTP /admin/add/incoming request.
+ *
+ * @param cls the `struct TALER_MINT_AdminAddIncomingHandle`
+ */
+static void
+handle_admin_add_incoming_finished (void *cls,
+ CURL *eh)
+{
+ struct TALER_MINT_AdminAddIncomingHandle *aai = cls;
+ long response_code;
+ json_error_t error;
+ json_t *json;
+
+ json = NULL;
+ if (0 == aai->eno)
+ {
+ json = json_loadb (aai->buf,
+ aai->buf_size,
+ JSON_REJECT_DUPLICATES | JSON_DISABLE_EOF_CHECK,
+ &error);
+ if (NULL == json)
+ {
+ JSON_WARN (error);
+ response_code = 0;
+ }
+ }
+ if (NULL != json)
+ {
+ if (CURLE_OK !=
+ curl_easy_getinfo (eh,
+ CURLINFO_RESPONSE_CODE,
+ &response_code))
+ {
+ /* unexpected error... */
+ GNUNET_break (0);
+ response_code = 0;
+ }
+ }
+ switch (response_code)
+ {
+ case 0:
+ break;
+ case MHD_HTTP_OK:
+ break;
+ case MHD_HTTP_BAD_REQUEST:
+ /* This should never happen, either us or the mint is buggy
+ (or API version conflict); just pass JSON reply to the application */
+ break;
+ case MHD_HTTP_FORBIDDEN:
+ /* Access denied */
+ break;
+ case MHD_HTTP_UNAUTHORIZED:
+ /* Nothing really to verify, mint says one of the signatures is
+ invalid; as we checked them, this should never happen, we
+ should pass the JSON reply to the application */
+ break;
+ case MHD_HTTP_NOT_FOUND:
+ /* Nothing really to verify, this should never
+ happen, we should pass the JSON reply to the application */
+ break;
+ case MHD_HTTP_INTERNAL_SERVER_ERROR:
+ /* Server had an internal issue; we should retry, but this API
+ leaves this to the application */
+ break;
+ default:
+ /* unexpected response code */
+ GNUNET_break (0);
+ response_code = 0;
+ break;
+ }
+ aai->cb (aai->cb_cls,
+ response_code,
+ json);
+ json_decref (json);
+ TALER_MINT_admin_add_incoming_cancel (aai);
+}
+
+
+/**
+ * Callback used when downloading the reply to a /admin/add/incoming
+ * request. Just appends all of the data to the `buf` in the `struct
+ * TALER_MINT_AdminAddIncomingHandle` for further processing. The size
+ * of the download is limited to #GNUNET_MAX_MALLOC_CHECKED, if the
+ * download exceeds this size, we abort with an error.
+ *
+ * @param bufptr data downloaded via HTTP
+ * @param size size of an item in @a bufptr
+ * @param nitems number of items in @a bufptr
+ * @param cls the `struct TALER_MINT_DepositHandle`
+ * @return number of bytes processed from @a bufptr
+ */
+static int
+admin_add_incoming_download_cb (char *bufptr,
+ size_t size,
+ size_t nitems,
+ void *cls)
+{
+ struct TALER_MINT_AdminAddIncomingHandle *aai = cls;
+ size_t msize;
+ void *buf;
+
+ if (0 == size * nitems)
+ {
+ /* Nothing (left) to do */
+ return 0;
+ }
+ msize = size * nitems;
+ if ( (msize + aai->buf_size) >= GNUNET_MAX_MALLOC_CHECKED)
+ {
+ aai->eno = ENOMEM;
+ return 0; /* signals an error to curl */
+ }
+ aai->buf = GNUNET_realloc (aai->buf,
+ aai->buf_size + msize);
+ buf = aai->buf + aai->buf_size;
+ memcpy (buf, bufptr, msize);
+ aai->buf_size += msize;
+ return msize;
+}
+
+
+/**
+ * Notify the mint that we have received an incoming transaction
+ * which fills a reserve. Note that this API is an administrative
+ * API and thus not accessible to typical mint clients, but only
+ * to the operators of the mint.
+ *
+ * @param mint the mint handle; the mint must be ready to operate
+ * @param reserve_pub public key of the reserve
+ * @param amount amount that was deposited
+ * @param execution_date when did we receive the amount
+ * @param wire wire details
+ * @param res_cb the callback to call when the final result for this request is available
+ * @param res_cb_cls closure for the above callback
+ * @return NULL
+ * if the inputs are invalid (i.e. invalid amount).
+ * In this case, the callback is not called.
+ */
+struct TALER_MINT_AdminAddIncomingHandle *
+TALER_MINT_admin_add_incoming (struct TALER_MINT_Handle *mint,
+ const struct TALER_ReservePublicKeyP *reserve_pub,
+ const struct TALER_Amount *amount,
+ const struct GNUNET_TIME_Absolute execution_date,
+ const json_t *wire,
+ TALER_MINT_AdminAddIncomingResultCallback res_cb,
+ void *res_cb_cls)
+{
+ struct TALER_MINT_AdminAddIncomingHandle *aai;
+ struct TALER_MINT_Context *ctx;
+ json_t *admin_obj;
+ CURL *eh;
+
+ if (GNUNET_YES !=
+ MAH_handle_is_ready (mint))
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ admin_obj = json_pack ("{s:o, s:o," /* reserve_pub/amount */
+ " s:o, s:o}", /* execution_Date/wire */
+ "reserve_pub", TALER_json_from_data (reserve_pub,
+ sizeof (*reserve_pub)),
+ "amount", TALER_json_from_amount (amount),
+ "execution_date", TALER_json_from_abs (execution_date),
+ "wire", wire);
+ aai = GNUNET_new (struct TALER_MINT_AdminAddIncomingHandle);
+ aai->mint = mint;
+ aai->cb = res_cb;
+ aai->cb_cls = res_cb_cls;
+ aai->url = MAH_path_to_url (mint, "/admin/add/incoming");
+
+ eh = curl_easy_init ();
+ GNUNET_assert (NULL != (aai->json_enc =
+ json_dumps (admin_obj,
+ JSON_COMPACT)));
+ json_decref (admin_obj);
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_URL,
+ aai->url));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_POSTFIELDS,
+ aai->json_enc));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_POSTFIELDSIZE,
+ strlen (aai->json_enc)));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_WRITEFUNCTION,
+ &admin_add_incoming_download_cb));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_WRITEDATA,
+ aai));
+ GNUNET_assert (NULL != (aai->headers =
+ curl_slist_append (aai->headers,
+ "Content-Type: application/json")));
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_HTTPHEADER,
+ aai->headers));
+ ctx = MAH_handle_to_context (mint);
+ aai->job = MAC_job_add (ctx,
+ eh,
+ &handle_admin_add_incoming_finished,
+ aai);
+ return aai;
+}
+
+
+/**
+ * Cancel an add incoming. This function cannot be used on a request
+ * handle if a response is already served for it.
+ *
+ * @param sign the admin add incoming request handle
+ */
+void
+TALER_MINT_admin_add_incoming_cancel (struct TALER_MINT_AdminAddIncomingHandle *aai)
+{
+ MAC_job_cancel (aai->job);
+ curl_slist_free_all (aai->headers);
+ GNUNET_free (aai->url);
+ GNUNET_free (aai->json_enc);
+ GNUNET_free (aai);
+}
+
+
+/* end of mint_api_admin.c */
diff --git a/src/mint/taler-mint-httpd_admin.c b/src/mint/taler-mint-httpd_admin.c
new file mode 100644
index 000000000..22ead53ee
--- /dev/null
+++ b/src/mint/taler-mint-httpd_admin.c
@@ -0,0 +1,152 @@
+/*
+ This file is part of TALER
+ Copyright (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_admin.c
+ * @brief Handle /admin/ requests
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <gnunet/gnunet_util_lib.h>
+#include <jansson.h>
+#include "taler-mint-httpd_admin.h"
+#include "taler-mint-httpd_parsing.h"
+#include "taler-mint-httpd_responses.h"
+
+
+/**
+ * Check permissions (we only allow access to /admin/ from loopback).
+ *
+ * @param connection connection to perform access check for
+ * @return #GNUNET_OK if permitted,
+ * #GNUNET_NO if denied and error was queued,
+ * #GNUNET_SYSERR if denied and we failed to report
+ */
+static int
+check_permissions (struct MHD_Connection *connection)
+{
+ const union MHD_ConnectionInfo *ci;
+ const struct sockaddr *addr;
+ int res;
+
+ ci = MHD_get_connection_info (connection,
+ MHD_CONNECTION_INFO_CLIENT_ADDRESS);
+ if (NULL == ci)
+ {
+ GNUNET_break (0);
+ res = TMH_RESPONSE_reply_internal_error (connection,
+ "Failed to verify client address");
+ return (MHD_YES == res) ? GNUNET_NO : GNUNET_SYSERR;
+ }
+ addr = ci->client_addr;
+ switch (addr->sa_family)
+ {
+ case AF_INET:
+ {
+ const struct sockaddr_in *sin = (const struct sockaddr_in *) addr;
+
+ if (INADDR_LOOPBACK != sin->sin_addr.s_addr)
+ {
+ res = TMH_RESPONSE_reply_permission_denied (connection,
+ "/admin/ only allowed via loopback");
+ return (MHD_YES == res) ? GNUNET_NO : GNUNET_SYSERR;
+ }
+ break;
+ }
+ case AF_INET6:
+ {
+ const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *) addr;
+
+ if (! IN6_IS_ADDR_LOOPBACK (&sin6->sin6_addr))
+ {
+ res = TMH_RESPONSE_reply_permission_denied (connection,
+ "/admin/ only allowed via loopback");
+ return (MHD_YES == res) ? GNUNET_NO : GNUNET_SYSERR;
+ }
+ break;
+ }
+ default:
+ GNUNET_break (0);
+ res = TMH_RESPONSE_reply_internal_error (connection,
+ "Unsupported AF");
+ return (MHD_YES == res) ? GNUNET_NO : GNUNET_SYSERR;
+ }
+ return GNUNET_OK;
+}
+
+
+
+/**
+ * Handle a "/admin/add/incoming" request. Parses the
+ * given "reserve_pub", "amount", "transaction" and "h_wire"
+ * details and adds the respective transaction to the database.
+ *
+ * @param rh context of the handler
+ * @param connection the MHD connection to handle
+ * @param[in,out] connection_cls the connection's closure (can be updated)
+ * @param upload_data upload data
+ * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
+ * @return MHD result code
+ */
+int
+TMH_ADMIN_handler_admin_add_incoming (struct TMH_RequestHandler *rh,
+ struct MHD_Connection *connection,
+ void **connection_cls,
+ const char *upload_data,
+ size_t *upload_data_size)
+{
+ struct TALER_ReservePublicKeyP reserve_pub;
+ struct TALER_Amount amount;
+ struct GNUNET_TIME_Absolute at;
+ json_t *wire;
+ json_t *root;
+ struct TMH_PARSE_FieldSpecification spec[] = {
+ TMH_PARSE_MEMBER_FIXED ("reserve_pub", &reserve_pub),
+ TMH_PARSE_MEMBER_AMOUNT ("amount", &amount),
+ TMH_PARSE_MEMBER_TIME_ABS ("execution_date", &at),
+ TMH_PARSE_MEMBER_OBJECT ("wire", &wire),
+ TMH_PARSE_MEMBER_END
+ };
+ int res;
+
+ res = check_permissions (connection);
+ if (GNUNET_OK != res)
+ return (GNUNET_OK == res) ? MHD_YES : MHD_NO;
+
+ res = TMH_PARSE_post_json (connection,
+ connection_cls,
+ upload_data,
+ upload_data_size,
+ &root);
+ if (GNUNET_SYSERR == res)
+ return MHD_NO;
+ if ( (GNUNET_NO == res) || (NULL == root) )
+ return MHD_YES;
+ res = TMH_PARSE_json_data (connection,
+ root,
+ spec);
+ json_decref (root);
+ if (GNUNET_OK != res)
+ return (GNUNET_SYSERR == res) ? MHD_NO : MHD_YES;
+ res = TMH_DB_execute_admin_add_incoming (connection,
+ &reserve_pub,
+ &amount,
+ at,
+ wire);
+ TMH_PARSE_release_data (spec);
+ return res;
+}
+
+/* end of taler-mint-httpd_admin.c */
diff --git a/src/mint/taler-mint-httpd_admin.h b/src/mint/taler-mint-httpd_admin.h
new file mode 100644
index 000000000..b8ca3ce59
--- /dev/null
+++ b/src/mint/taler-mint-httpd_admin.h
@@ -0,0 +1,46 @@
+/*
+ This file is part of TALER
+ Copyright (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_admin.h
+ * @brief Handle /admin/ requests
+ * @author Christian Grothoff
+ */
+#ifndef TALER_MINT_HTTPD_ADMIN_H
+#define TALER_MINT_HTTPD_ADMIN_H
+
+#include <microhttpd.h>
+#include "taler-mint-httpd.h"
+
+/**
+ * Handle a "/admin/add/incoming" request. Parses the
+ * given "reserve_pub", "amount", "transaction" and "h_wire"
+ * details and adds the respective transaction to the database.
+ *
+ * @param rh context of the handler
+ * @param connection the MHD connection to handle
+ * @param[in,out] connection_cls the connection's closure (can be updated)
+ * @param upload_data upload data
+ * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
+ * @return MHD result code
+ */
+int
+TMH_ADMIN_handler_admin_add_incoming (struct TMH_RequestHandler *rh,
+ struct MHD_Connection *connection,
+ void **connection_cls,
+ const char *upload_data,
+ size_t *upload_data_size);
+
+#endif