aboutsummaryrefslogtreecommitdiff
path: root/src/lib/testing_api_cmd_auditor_exchanges.c
blob: e8dbc2b5e54f7a147ccca9d039d89fb7b737a229 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
/*
  This file is part of TALER
  Copyright (C) 2018 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/testing_api_cmd_auditor_exchanges.c
 * @brief command for testing /exchanges of the auditor
 * @author Christian Grothoff
 */
#include "platform.h"
#include "taler_json_lib.h"
#include <gnunet/gnunet_curl_lib.h>
#include "taler_auditor_service.h"
#include "taler_testing_lib.h"
#include "taler_signatures.h"
#include "backoff.h"


/**
 * State for a "deposit confirmation" CMD.
 */
struct ExchangesState
{

  /**
   * Exchanges handle while operation is running.
   */
  struct TALER_AUDITOR_ListExchangesHandle *leh;

  /**
   * Auditor connection.
   */
  struct TALER_AUDITOR_Handle *auditor;

  /**
   * Interpreter state.
   */
  struct TALER_TESTING_Interpreter *is;

  /**
   * Task scheduled to try later.
   */
  struct GNUNET_SCHEDULER_Task *retry_task;

  /**
   * How long do we wait until we retry?
   */
  struct GNUNET_TIME_Relative backoff;

  /**
   * Expected HTTP response code.
   */
  unsigned int expected_response_code;

  /**
   * URL of the exchange expected to be included in the response.
   */
  const char *exchange_url;

  /**
   * Should we retry on (transient) failures?
   */
  int do_retry;

};


/**
 * Run the command.
 *
 * @param cls closure.
 * @param cmd the command to execute.
 * @param is the interpreter state.
 */
static void
exchanges_run (void *cls,
               const struct TALER_TESTING_Command *cmd,
               struct TALER_TESTING_Interpreter *is);


/**
 * Task scheduled to re-try #exchanges_run.
 *
 * @param cls a `struct ExchangesState`
 */
static void
do_retry (void *cls)
{
  struct ExchangesState *es = cls;

  es->retry_task = NULL;
  exchanges_run (es,
                 NULL,
                 es->is);
}


/**
 * Callback to analyze the /exchanges response.
 *
 * @param cls closure.
 * @param http_status HTTP response code.
 * @param ec taler-specific error code.
 * @param obj raw response from the auditor.
 */
static void
exchanges_cb (void *cls,
              unsigned int http_status,
              enum TALER_ErrorCode ec,
              unsigned int num_exchanges,
              const struct TALER_AUDITOR_ExchangeInfo *ei,
              const json_t *raw_response)
{
  struct ExchangesState *es = cls;

  es->leh = NULL;
  if (es->expected_response_code != http_status)
  {
    if (GNUNET_YES == es->do_retry)
    {
      if ( (0 == http_status) ||
           (TALER_EC_DB_COMMIT_FAILED_ON_RETRY == ec) ||
           (MHD_HTTP_INTERNAL_SERVER_ERROR == http_status) )
      {
        GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                    "Retrying list exchanges failed with %u/%d\n",
                    http_status,
                    (int) ec);
        /* on DB conflicts, do not use backoff */
        if (TALER_EC_DB_COMMIT_FAILED_ON_RETRY == ec)
          es->backoff = GNUNET_TIME_UNIT_ZERO;
        else
          es->backoff = EXCHANGE_LIB_BACKOFF (es->backoff);
        es->retry_task = GNUNET_SCHEDULER_add_delayed (es->backoff,
                                                       &do_retry,
                                                       es);
        return;
      }
    }
    GNUNET_log
      (GNUNET_ERROR_TYPE_ERROR,
      "Unexpected response code %u to command %s in %s:%u\n",
      http_status,
      es->is->commands[es->is->ip].label,
      __FILE__,
      __LINE__);
    json_dumpf (raw_response, stderr, 0);
    TALER_TESTING_interpreter_fail (es->is);
    return;
  }
  if (NULL != es->exchange_url)
  {
    unsigned int found = GNUNET_NO;

    for (unsigned int i = 0;
         i<num_exchanges;
         i++)
      if (0 == strcmp (es->exchange_url,
                       ei[i].exchange_url))
        found = GNUNET_YES;
    if (GNUNET_NO == found)
    {
      TALER_LOG_ERROR
        ("Exchange '%s' doesn't exist at this auditor\n",
        es->exchange_url);
      TALER_TESTING_interpreter_fail (es->is);
      return;
    }

    TALER_LOG_DEBUG ("Exchange '%s' exists at this auditor!\n",
                     es->exchange_url);
  }
  TALER_TESTING_interpreter_next (es->is);
}


/**
 * Run the command.
 *
 * @param cls closure.
 * @param cmd the command to execute.
 * @param is the interpreter state.
 */
static void
exchanges_run (void *cls,
               const struct TALER_TESTING_Command *cmd,
               struct TALER_TESTING_Interpreter *is)
{
  struct ExchangesState *es = cls;

  es->is = is;
  es->leh = TALER_AUDITOR_list_exchanges
              (is->auditor,
              &exchanges_cb,
              es);

  if (NULL == es->leh)
  {
    GNUNET_break (0);
    TALER_TESTING_interpreter_fail (is);
    return;
  }
  return;
}


/**
 * Free the state of a "exchanges" CMD, and possibly cancel a
 * pending operation thereof.
 *
 * @param cls closure, a `struct ExchangesState`
 * @param cmd the command which is being cleaned up.
 */
static void
exchanges_cleanup (void *cls,
                   const struct TALER_TESTING_Command *cmd)
{
  struct ExchangesState *es = cls;

  if (NULL != es->leh)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                "Command %u (%s) did not complete\n",
                es->is->ip,
                cmd->label);
    TALER_AUDITOR_list_exchanges_cancel (es->leh);
    es->leh = NULL;
  }
  if (NULL != es->retry_task)
  {
    GNUNET_SCHEDULER_cancel (es->retry_task);
    es->retry_task = NULL;
  }
  GNUNET_free (es);
}


/**
 * Offer internal data to other commands.
 *
 * @param cls closure.
 * @param ret[out] set to the wanted data.
 * @param trait name of the trait.
 * @param index index number of the traits to be returned.
 *
 * @return #GNUNET_OK on success
 */
static int
exchanges_traits (void *cls,
                  const void **ret,
                  const char *trait,
                  unsigned int index)
{
  /* Must define this function because some callbacks
   * look for certain traits on _all_ the commands. */
  return GNUNET_SYSERR;
}


/**
 * Create a "list exchanges" command.
 *
 * @param label command label.
 * @param auditor auditor connection.
 * @param expected_response_code expected HTTP response code.
 * @return the command.
 */
struct TALER_TESTING_Command
TALER_TESTING_cmd_exchanges
  (const char *label,
  struct TALER_AUDITOR_Handle *auditor,
  unsigned int expected_response_code)
{
  struct TALER_TESTING_Command cmd = {0}; /* need explicit zeroing..*/
  struct ExchangesState *es;

  es = GNUNET_new (struct ExchangesState);
  es->auditor = auditor;
  es->expected_response_code = expected_response_code;

  cmd.cls = es;
  cmd.label = label;
  cmd.run = &exchanges_run;
  cmd.cleanup = &exchanges_cleanup;
  cmd.traits = &exchanges_traits;

  return cmd;
}


/**
 * Create a "list exchanges" command and check whether
 * a particular exchange belongs to the returned bundle.
 *
 * @param label command label.
 * @param auditor auditor connection.
 * @param expected_response_code expected HTTP response code.
 * @param exchange_url URL of the exchange supposed to
 *  be included in the response.
 * @return the command.
 */
struct TALER_TESTING_Command
TALER_TESTING_cmd_exchanges_with_url
  (const char *label,
  unsigned int expected_response_code,
  const char *exchange_url)
{
  struct TALER_TESTING_Command cmd = {0}; /* need explicit zeroing..*/
  struct ExchangesState *es;

  es = GNUNET_new (struct ExchangesState);
  es->expected_response_code = expected_response_code;
  es->exchange_url = exchange_url;

  cmd.cls = es;
  cmd.label = label;
  cmd.run = &exchanges_run;
  cmd.cleanup = &exchanges_cleanup;
  cmd.traits = &exchanges_traits;

  return cmd;
}


/**
 * Modify an exchanges command to enable retries when we get
 * transient errors from the auditor.
 *
 * @param cmd a deposit confirmation command
 * @return the command with retries enabled
 */
struct TALER_TESTING_Command
TALER_TESTING_cmd_exchanges_with_retry (struct TALER_TESTING_Command cmd)
{
  struct ExchangesState *es;

  GNUNET_assert (&exchanges_run == cmd.run);
  es = cmd.cls;
  es->do_retry = GNUNET_YES;
  return cmd;
}


/* end of testing_auditor_api_cmd_exchanges.c */