donau

donau_api_charity_post.c (6623B)

---

 /*
   This file is part of TALER
   Copyright (C) 2024 Taler Systems SA
 
   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 lib/donau_api_charity_post.c
  * @brief Implementation of the "handle" component of the donau's HTTP API
  * @author Lukas Matyja
  */
 #include <gnunet/gnunet_curl_lib.h>
 #include <taler/taler_json_lib.h>
 #include <taler/taler_curl_lib.h>
 #include "donau_service.h"
 #include "donau_api_curl_defaults.h"
 #include "donau_json_lib.h"
 
 
 /**
  * Handle for a POST /charities request.
  */
 struct DONAU_CharityPostHandle
 {
   /**
    * The url for the /charities request.
    */
   char *url;
 
   /**
    * Minor context that holds body and headers.
    */
   struct TALER_CURL_PostContext post_ctx;
 
   /**
    * Entry for this request with the `struct GNUNET_CURL_Context`.
    */
   struct GNUNET_CURL_Job *job;
 
   /**
    * Function to call with the result.
    */
   DONAU_PostCharityResponseCallback cb;
 
   /**
    * Closure to pass to @e cb.
    */
   void *cb_cls;
 
   /**
    * Reference to the execution context.
    */
   struct GNUNET_CURL_Context *ctx;
 
 };
 
 /**
  * Function called when we're done processing the
  * HTTP POST /charities request.
  *
  * @param cls the `struct KeysRequest`
  * @param response_code HTTP response code, 0 on error
  * @param resp_obj parsed JSON result, NULL on error
  */
 static void
 handle_charity_post_finished (void *cls,
                               long response_code,
                               const void *resp_obj)
 {
   struct DONAU_CharityPostHandle *cph = cls;
   const json_t *j = resp_obj;
 
   struct DONAU_PostCharityResponse pcresp = {
     .hr.reply = j,
     .hr.http_status = (unsigned int) response_code
   };
 
   cph->job = NULL;
   switch (response_code)
   {
   case MHD_HTTP_CREATED:
     {
       struct GNUNET_JSON_Specification spec[] = {
         GNUNET_JSON_spec_uint64 ("charity_id",
                                  &pcresp.details.ok.charity_id),
         GNUNET_JSON_spec_end ()
       };
 
       if (GNUNET_OK !=
           GNUNET_JSON_parse (j,
                              spec,
                              NULL,
                              NULL))
       {
         GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                     "Could not parse response from charity POST\n");
         GNUNET_break_op (0);
       }
     }
     break;
   case MHD_HTTP_FORBIDDEN:
     pcresp.hr.ec = TALER_JSON_get_error_code (j);
     pcresp.hr.hint = TALER_JSON_get_error_hint (j);
     break;
   case MHD_HTTP_NOT_FOUND:
     pcresp.hr.ec = TALER_JSON_get_error_code (j);
     pcresp.hr.hint = TALER_JSON_get_error_hint (j);
     break;
   case MHD_HTTP_CONFLICT:
     pcresp.hr.ec = TALER_JSON_get_error_code (j);
     pcresp.hr.hint = TALER_JSON_get_error_hint (j);
     break;
   default:
     /* unexpected response code */
     GNUNET_break_op (0);
     pcresp.hr.ec = TALER_JSON_get_error_code (j);
     pcresp.hr.hint = TALER_JSON_get_error_hint (j);
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Unexpected response code %u/%d for POST %s\n",
                 (unsigned int) response_code,
                 (int) pcresp.hr.ec,
                 cph->url);
     break;
   }
   if (NULL != cph->cb)
   {
     cph->cb (cph->cb_cls,
              &pcresp);
     cph->cb = NULL;
   }
   DONAU_charity_post_cancel (cph);
 }
 
 
 struct DONAU_CharityPostHandle *
 DONAU_charity_post (
   struct GNUNET_CURL_Context *ctx,
   const char *url,
   const char *charity_name,
   const char *charity_url,
   const struct TALER_Amount *max_per_year,
   const struct DONAU_CharityPublicKeyP *charity_pub,
   const struct DONAU_BearerToken *bearer,
   DONAU_PostCharityResponseCallback cb,
   void *cb_cls)
 {
   struct DONAU_CharityPostHandle *cph;
   CURL *eh;
   json_t *body;
 
   TALER_LOG_DEBUG ("Connecting to the donau (%s)\n",
                    url);
   cph = GNUNET_new (struct DONAU_CharityPostHandle);
   cph->url = GNUNET_strdup (url);
   cph->cb = cb;
   cph->cb_cls = cb_cls;
   cph->ctx = ctx;
   cph->url = TALER_url_join (url,
                              "charities",
                              NULL);
   if (NULL == cph->url)
   {
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Could not construct request URL.\n");
     GNUNET_free (cph);
     return NULL;
   }
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "POST a charity with URL `%s'.\n",
               cph->url);
   body = GNUNET_JSON_PACK (
     GNUNET_JSON_pack_data_auto ("charity_pub",
                                 charity_pub),
     GNUNET_JSON_pack_string ("charity_url",
                              charity_url),
     GNUNET_JSON_pack_string ("charity_name",
                              charity_name),
     TALER_JSON_pack_amount ("max_per_year",
                             max_per_year));
   eh = DONAU_curl_easy_get_ (cph->url);
   if ( (NULL == eh) ||
        (GNUNET_OK !=
         TALER_curl_easy_post (&cph->post_ctx,
                               eh,
                               body)) )
   {
     GNUNET_break (0);
     if (NULL != eh)
       curl_easy_cleanup (eh);
     json_decref (body);
     GNUNET_free (cph->url);
     return NULL;
   }
   json_decref (body);
   cph->job = GNUNET_CURL_job_add2 (ctx,
                                    eh,
                                    cph->post_ctx.headers,
                                    &handle_charity_post_finished,
                                    cph);
   GNUNET_assert (NULL != cph->job);
   if (NULL != bearer)
   {
     struct curl_slist *auth;
     char *hdr;
 
     GNUNET_asprintf (&hdr,
                      "%s: Bearer %s",
                      MHD_HTTP_HEADER_AUTHORIZATION,
                      bearer->token);
     auth = curl_slist_append (NULL,
                               hdr);
     GNUNET_free (hdr);
     GNUNET_CURL_extend_headers (cph->job,
                                 auth);
     curl_slist_free_all (auth);
   }
   return cph;
 }
 
 
 void
 DONAU_charity_post_cancel (
   struct DONAU_CharityPostHandle *cph)
 {
   if (NULL != cph->job)
   {
     GNUNET_CURL_job_cancel (cph->job);
     cph->job = NULL;
   }
   TALER_curl_easy_post_finished (&cph->post_ctx);
   GNUNET_free (cph->url);
   GNUNET_free (cph);
 }