[taler-exchange] branch master updated: implement first new client API

[gnunet]

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grothoff pushed a commit to branch master
in repository exchange.

The following commit(s) were added to refs/heads/master by this push:
     new fd91a6ad implement first new client API
fd91a6ad is described below

commit fd91a6adede7af1f477f8858a7109351d9899417
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Wed Nov 25 21:19:13 2020 +0100

    implement first new client API
---
 src/include/taler_exchange_service.h               |  40 -----
 src/lib/Makefile.am                                |   1 +
 src/lib/exchange_api_auditor_add_denomination.c    |  42 ++++-
 src/lib/exchange_api_management_auditor_disable.c  |  40 ++++-
 src/lib/exchange_api_management_auditor_enable.c   |  40 ++++-
 src/lib/exchange_api_management_get_keys.c         |  40 ++++-
 src/lib/exchange_api_management_post_keys.c        |  40 ++++-
 ...change_api_management_revoke_denomination_key.c |  40 ++++-
 .../exchange_api_management_revoke_signing_key.c   | 188 ++++++++++++++++++---
 src/lib/exchange_api_management_wire_disable.c     |  40 ++++-
 src/lib/exchange_api_management_wire_enable.c      |  40 ++++-
 11 files changed, 475 insertions(+), 76 deletions(-)

diff --git a/src/include/taler_exchange_service.h 
b/src/include/taler_exchange_service.h
index b3235e32..fa1cfde4 100644
--- a/src/include/taler_exchange_service.h
+++ b/src/include/taler_exchange_service.h
@@ -2039,46 +2039,6 @@ struct TALER_EXCHANGE_FutureKeys
 };
 
 
-/**
- * General information about the HTTP response we obtained
- * from the exchange for a request.
- */
-struct TALER_EXCHANGE_HttpResponse
-{
-
-  /**
-   * The complete JSON reply. NULL if we failed to parse the
-   * reply (too big, invalid JSON).
-   */
-  const json_t *reply;
-
-  /**
-   * Set to the human-readable 'hint' that is optionally
-   * provided by the exchange together with errors. NULL
-   * if no hint was provided or if there was no error.
-   */
-  const char *hint;
-
-  /**
-   * HTTP status code for the response.  0 if the
-   * HTTP request failed and we did not get any answer, or
-   * if the answer was invalid and we set @a ec to a
-   * client-side error code.
-   */
-  unsigned int http_status;
-
-  /**
-   * Taler error code.  #TALER_EC_NONE if everything was
-   * OK.  Usually set to the "code" field of an error
-   * response, but may be set to values created at the
-   * client side, for example when the response was
-   * not in JSON format or was otherwise ill-formed.
-   */
-  enum TALER_ErrorCode ec;
-
-};
-
-
 /**
  * Function called with information about future keys.
  *
diff --git a/src/lib/Makefile.am b/src/lib/Makefile.am
index 830ecf65..4c447c18 100644
--- a/src/lib/Makefile.am
+++ b/src/lib/Makefile.am
@@ -27,6 +27,7 @@ libtalerexchange_la_SOURCES = \
   exchange_api_deposit.c \
   exchange_api_deposits_get.c \
   exchange_api_link.c \
+  exchange_api_management_revoke_signing_key.c \
   exchange_api_melt.c \
   exchange_api_recoup.c \
   exchange_api_refresh_common.c exchange_api_refresh_common.h \
diff --git a/src/lib/exchange_api_auditor_add_denomination.c 
b/src/lib/exchange_api_auditor_add_denomination.c
index a4d85f8f..ce18c3d5 100644
--- a/src/lib/exchange_api_auditor_add_denomination.c
+++ b/src/lib/exchange_api_auditor_add_denomination.c
@@ -29,7 +29,34 @@
 /**
  * @brief Handle for a POST /auditor/$AUDITOR_PUB/$H_DENOM_PUB request.
  */
-struct TALER_EXCHANGE_AuditorAddDenominationHandle;
+struct TALER_EXCHANGE_AuditorAddDenominationHandle
+{
+
+  /**
+   * The url for this request.
+   */
+  char *url;
+
+  /**
+   * Handle for the request.
+   */
+  struct GNUNET_CURL_Job *job;
+
+  /**
+   * Function to call with the result.
+   */
+  TALER_EXCHANGE_AuditorAddDenominationCallback cb;
+
+  /**
+   * Closure for @a cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Reference to the execution context.
+   */
+  struct GNUNET_CURL_Context *ctx;
+};
 
 
 /**
@@ -58,8 +85,17 @@ TALER_EXCHANGE_add_auditor_denomination (
 /**
  * Cancel #TALER_EXCHANGE_add_auditor_denomination() operation.
  *
- * @param gh handle of the operation to cancel
+ * @param ah handle of the operation to cancel
  */
 void
 TALER_EXCHANGE_add_auditor_denomination_cancel (
-  struct TALER_EXCHANGE_AuditorAddDenominationHandle *ah);
+  struct TALER_EXCHANGE_AuditorAddDenominationHandle *ah)
+{
+  if (NULL != ah->job)
+  {
+    GNUNET_CURL_job_cancel (ah->job);
+    ah->job = NULL;
+  }
+  GNUNET_free (ah->url);
+  GNUNET_free (ah);
+}
diff --git a/src/lib/exchange_api_management_auditor_disable.c 
b/src/lib/exchange_api_management_auditor_disable.c
index 1744179e..8cd4e322 100644
--- a/src/lib/exchange_api_management_auditor_disable.c
+++ b/src/lib/exchange_api_management_auditor_disable.c
@@ -28,7 +28,34 @@
 /**
  * @brief Handle for a POST /management/auditors/disable request.
  */
-struct TALER_EXCHANGE_ManagementAuditorDisableHandle;
+struct TALER_EXCHANGE_ManagementAuditorDisableHandle
+{
+
+  /**
+   * The url for this request.
+   */
+  char *url;
+
+  /**
+   * Handle for the request.
+   */
+  struct GNUNET_CURL_Job *job;
+
+  /**
+   * Function to call with the result.
+   */
+  TALER_EXCHANGE_ManagementAuditorDisableCallback cb;
+
+  /**
+   * Closure for @a cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Reference to the execution context.
+   */
+  struct GNUNET_CURL_Context *ctx;
+};
 
 
 /**
@@ -63,4 +90,13 @@ TALER_EXCHANGE_management_disable_auditor (
  */
 void
 TALER_EXCHANGE_management_disable_auditor_cancel (
-  struct TALER_EXCHANGE_ManagementAuditorDisableHandle *ah);
+  struct TALER_EXCHANGE_ManagementAuditorDisableHandle *ah)
+{
+  if (NULL != ah->job)
+  {
+    GNUNET_CURL_job_cancel (ah->job);
+    ah->job = NULL;
+  }
+  GNUNET_free (ah->url);
+  GNUNET_free (ah);
+}
diff --git a/src/lib/exchange_api_management_auditor_enable.c 
b/src/lib/exchange_api_management_auditor_enable.c
index 954b678b..98eea9a8 100644
--- a/src/lib/exchange_api_management_auditor_enable.c
+++ b/src/lib/exchange_api_management_auditor_enable.c
@@ -29,7 +29,34 @@
 /**
  * @brief Handle for a POST /management/auditors request.
  */
-struct TALER_EXCHANGE_ManagementAuditorEnableHandle;
+struct TALER_EXCHANGE_ManagementAuditorEnableHandle
+{
+
+  /**
+   * The url for this request.
+   */
+  char *url;
+
+  /**
+   * Handle for the request.
+   */
+  struct GNUNET_CURL_Job *job;
+
+  /**
+   * Function to call with the result.
+   */
+  TALER_EXCHANGE_ManagementAuditorEnableCallback cb;
+
+  /**
+   * Closure for @a cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Reference to the execution context.
+   */
+  struct GNUNET_CURL_Context *ctx;
+};
 
 
 /**
@@ -64,4 +91,13 @@ TALER_EXCHANGE_management_enable_auditor (
  */
 void
 TALER_EXCHANGE_management_enable_auditor_cancel (
-  struct TALER_EXCHANGE_ManagementAuditorEnableHandle *ah);
+  struct TALER_EXCHANGE_ManagementAuditorEnableHandle *ah)
+{
+  if (NULL != ah->job)
+  {
+    GNUNET_CURL_job_cancel (ah->job);
+    ah->job = NULL;
+  }
+  GNUNET_free (ah->url);
+  GNUNET_free (ah);
+}
diff --git a/src/lib/exchange_api_management_get_keys.c 
b/src/lib/exchange_api_management_get_keys.c
index 46a10710..36259314 100644
--- a/src/lib/exchange_api_management_get_keys.c
+++ b/src/lib/exchange_api_management_get_keys.c
@@ -29,7 +29,34 @@
 /**
  * @brief Handle for a GET /management/keys request.
  */
-struct TALER_EXCHANGE_ManagementGetKeysHandle;
+struct TALER_EXCHANGE_ManagementGetKeysHandle
+{
+
+  /**
+   * The url for this request.
+   */
+  char *url;
+
+  /**
+   * Handle for the request.
+   */
+  struct GNUNET_CURL_Job *job;
+
+  /**
+   * Function to call with the result.
+   */
+  TALER_EXCHANGE_ManagementGetKeysCallback cb;
+
+  /**
+   * Closure for @a cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Reference to the execution context.
+   */
+  struct GNUNET_CURL_Context *ctx;
+};
 
 
 /**
@@ -56,4 +83,13 @@ TALER_EXCHANGE_get_management_keys (struct 
GNUNET_CURL_Context *ctx,
  */
 void
 TALER_EXCHANGE_get_management_keys_cancel (
-  struct TALER_EXCHANGE_ManagementGetKeysHandle *gh);
+  struct TALER_EXCHANGE_ManagementGetKeysHandle *gh)
+{
+  if (NULL != gh->job)
+  {
+    GNUNET_CURL_job_cancel (gh->job);
+    gh->job = NULL;
+  }
+  GNUNET_free (gh->url);
+  GNUNET_free (gh);
+}
diff --git a/src/lib/exchange_api_management_post_keys.c 
b/src/lib/exchange_api_management_post_keys.c
index fe8131b1..7cbf27b3 100644
--- a/src/lib/exchange_api_management_post_keys.c
+++ b/src/lib/exchange_api_management_post_keys.c
@@ -29,7 +29,34 @@
 /**
  * @brief Handle for a POST /management/keys request.
  */
-struct TALER_EXCHANGE_ManagementPostKeysHandle;
+struct TALER_EXCHANGE_ManagementPostKeysHandle
+{
+
+  /**
+   * The url for this request.
+   */
+  char *url;
+
+  /**
+   * Handle for the request.
+   */
+  struct GNUNET_CURL_Job *job;
+
+  /**
+   * Function to call with the result.
+   */
+  TALER_EXCHANGE_ManagementGetKeysCallback cb;
+
+  /**
+   * Closure for @a cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Reference to the execution context.
+   */
+  struct GNUNET_CURL_Context *ctx;
+};
 
 
 /**
@@ -57,4 +84,13 @@ TALER_EXCHANGE_post_management_keys (
  */
 void
 TALER_EXCHANGE_post_management_keys_cancel (
-  struct TALER_EXCHANGE_ManagementPostKeysHandle *ph);
+  struct TALER_EXCHANGE_ManagementPostKeysHandle *ph)
+{
+  if (NULL != ph->job)
+  {
+    GNUNET_CURL_job_cancel (ph->job);
+    ph->job = NULL;
+  }
+  GNUNET_free (ph->url);
+  GNUNET_free (ph);
+}
diff --git a/src/lib/exchange_api_management_revoke_denomination_key.c 
b/src/lib/exchange_api_management_revoke_denomination_key.c
index 8eb3a05e..8a7404e5 100644
--- a/src/lib/exchange_api_management_revoke_denomination_key.c
+++ b/src/lib/exchange_api_management_revoke_denomination_key.c
@@ -29,7 +29,34 @@
 /**
  * @brief Handle for a POST /management/denominations/$H_DENOM_PUB/revoke 
request.
  */
-struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle;
+struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle
+{
+
+  /**
+   * The url for this request.
+   */
+  char *url;
+
+  /**
+   * Handle for the request.
+   */
+  struct GNUNET_CURL_Job *job;
+
+  /**
+   * Function to call with the result.
+   */
+  TALER_EXCHANGE_ManagementRevokeDenominationKeyCallback cb;
+
+  /**
+   * Closure for @a cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Reference to the execution context.
+   */
+  struct GNUNET_CURL_Context *ctx;
+};
 
 
 /**
@@ -60,4 +87,13 @@ TALER_EXCHANGE_management_revoke_denomination_key (
  */
 void
 TALER_EXCHANGE_management_revoke_denomination_key_cancel (
-  struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle *rh);
+  struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle *rh)
+{
+  if (NULL != rh->job)
+  {
+    GNUNET_CURL_job_cancel (rh->job);
+    rh->job = NULL;
+  }
+  GNUNET_free (rh->url);
+  GNUNET_free (rh);
+}
diff --git a/src/lib/exchange_api_management_revoke_signing_key.c 
b/src/lib/exchange_api_management_revoke_signing_key.c
index cebc8e32..3e8b7f63 100644
--- a/src/lib/exchange_api_management_revoke_signing_key.c
+++ b/src/lib/exchange_api_management_revoke_signing_key.c
@@ -24,25 +24,95 @@
 #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 /management/signkeys/$H_DENOM_PUB/revoke request.
- */
-struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle;
+struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle
+{
+
+  /**
+   * The url for this request.
+   */
+  char *url;
+
+  /**
+   * Minor context that holds body and headers.
+   */
+  struct TALER_CURL_PostContext post_ctx;
+
+  /**
+   * Handle for the request.
+   */
+  struct GNUNET_CURL_Job *job;
+
+  /**
+   * Function to call with the result.
+   */
+  TALER_EXCHANGE_ManagementRevokeSigningKeyCallback cb;
+
+  /**
+   * Closure for @a cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Reference to the execution context.
+   */
+  struct GNUNET_CURL_Context *ctx;
+};
 
 
 /**
- * Inform the exchange that a signing key was revoked.
+ * Function called when we're done processing the
+ * HTTP /management/signkeys/%s/revoke request.
  *
- * @param ctx the context
- * @param url HTTP base URL for the exchange
- * @param exchange_pub the public signing key that was revoked
- * @param master_sig signature affirming the revocation
- * @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_ManagementRevokeSigningKeyHandle *`
+ * @param response_code HTTP response code, 0 on error
+ * @param response response body, NULL if not in JSON
  */
+static void
+handle_revoke_signing_finished (void *cls,
+                                long response_code,
+                                const void *response)
+{
+  struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh = cls;
+  const json_t *json = response;
+  struct TALER_EXCHANGE_HttpResponse hr = {
+    .http_status = (unsigned int) response_code,
+    .reply = json
+  };
+
+  rh->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;
+  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 != rh->cb)
+  {
+    rh->cb (rh->cb_cls,
+            &hr);
+    rh->cb = NULL;
+  }
+  TALER_EXCHANGE_management_revoke_signing_key_cancel (rh);
+}
+
+
 struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *
 TALER_EXCHANGE_management_revoke_signing_key (
   struct GNUNET_CURL_Context *ctx,
@@ -50,14 +120,94 @@ TALER_EXCHANGE_management_revoke_signing_key (
   const struct TALER_ExchangePublicKeyP *exchange_pub,
   const struct TALER_MasterSignatureP *master_sig,
   TALER_EXCHANGE_ManagementRevokeSigningKeyCallback cb,
-  void *cb_cls);
+  void *cb_cls)
+{
+  struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh;
+  CURL *eh;
+  json_t *body;
+
+  rh = GNUNET_new (struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle);
+  rh->cb = cb;
+  rh->cb_cls = cb_cls;
+  rh->ctx = ctx;
+  {
+    char epub_str[sizeof (*exchange_pub) * 2];
+    char arg_str[sizeof (epub_str) + 64];
+    char *end;
+
+    end = GNUNET_STRINGS_data_to_string (exchange_pub,
+                                         sizeof (*exchange_pub),
+                                         epub_str,
+                                         sizeof (epub_str));
+    *end = '\0';
+    GNUNET_snprintf (arg_str,
+                     sizeof (arg_str),
+                     "management/signkeys/%s/revoke",
+                     epub_str);
+    rh->url = TALER_url_join (url,
+                              arg_str,
+                              NULL);
+  }
+  if (NULL == rh->url)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Could not construct request URL.\n");
+    GNUNET_free (rh);
+    return NULL;
+  }
+  body = json_pack ("{s:o}",
+                    "master_sig",
+                    GNUNET_JSON_from_data_auto (master_sig));
+  if (NULL == body)
+  {
+    GNUNET_break (0);
+    GNUNET_free (rh->url);
+    GNUNET_free (rh);
+    return NULL;
+  }
+  eh = curl_easy_init ();
+  if (GNUNET_OK !=
+      TALER_curl_easy_post (&rh->post_ctx,
+                            eh,
+                            body))
+  {
+    GNUNET_break (0);
+    json_decref (body);
+    GNUNET_free (rh->url);
+    GNUNET_free (eh);
+    return NULL;
+  }
+  json_decref (body);
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Requesting URL '%s'\n",
+              rh->url);
+  GNUNET_assert (CURLE_OK == curl_easy_setopt (eh,
+                                               CURLOPT_URL,
+                                               rh->url));
+  rh->job = GNUNET_CURL_job_add2 (ctx,
+                                  eh,
+                                  rh->post_ctx.headers,
+                                  &handle_revoke_signing_finished,
+                                  rh);
+  if (NULL == rh->job)
+  {
+    TALER_EXCHANGE_management_revoke_signing_key_cancel (rh);
+    return NULL;
+  }
+  return rh;
+}
 
 
-/**
- * Cancel #TALER_EXCHANGE_management_revoke_signing_key() operation.
- *
- * @param rh handle of the operation to cancel
- */
 void
 TALER_EXCHANGE_management_revoke_signing_key_cancel (
-  struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh);
+  struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh)
+{
+  if (NULL != rh->job)
+  {
+    GNUNET_CURL_job_cancel (rh->job);
+    rh->job = NULL;
+  }
+  TALER_curl_easy_post_finished (&rh->post_ctx);
+  GNUNET_free (rh->url);
+  GNUNET_free (rh);
+}
diff --git a/src/lib/exchange_api_management_wire_disable.c 
b/src/lib/exchange_api_management_wire_disable.c
index c51b350e..05d4832f 100644
--- a/src/lib/exchange_api_management_wire_disable.c
+++ b/src/lib/exchange_api_management_wire_disable.c
@@ -29,7 +29,34 @@
 /**
  * @brief Handle for a POST /management/wire/disable request.
  */
-struct TALER_EXCHANGE_ManagementWireDisableHandle;
+struct TALER_EXCHANGE_ManagementWireDisableHandle
+{
+
+  /**
+   * The url for this request.
+   */
+  char *url;
+
+  /**
+   * Handle for the request.
+   */
+  struct GNUNET_CURL_Job *job;
+
+  /**
+   * Function to call with the result.
+   */
+  TALER_EXCHANGE_ManagementWireDisableCallback cb;
+
+  /**
+   * Closure for @a cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Reference to the execution context.
+   */
+  struct GNUNET_CURL_Context *ctx;
+};
 
 
 /**
@@ -62,4 +89,13 @@ TALER_EXCHANGE_management_disable_wire (
  */
 void
 TALER_EXCHANGE_management_disable_wire_cancel (
-  struct TALER_EXCHANGE_ManagementWireDisableHandle *wh);
+  struct TALER_EXCHANGE_ManagementWireDisableHandle *wh)
+{
+  if (NULL != wh->job)
+  {
+    GNUNET_CURL_job_cancel (wh->job);
+    wh->job = NULL;
+  }
+  GNUNET_free (wh->url);
+  GNUNET_free (wh);
+}
diff --git a/src/lib/exchange_api_management_wire_enable.c 
b/src/lib/exchange_api_management_wire_enable.c
index a6ed1cdb..12a7dfd8 100644
--- a/src/lib/exchange_api_management_wire_enable.c
+++ b/src/lib/exchange_api_management_wire_enable.c
@@ -27,7 +27,34 @@
 /**
  * @brief Handle for a POST /management/wire request.
  */
-struct TALER_EXCHANGE_ManagementWireEnableHandle;
+struct TALER_EXCHANGE_ManagementWireEnableHandle
+{
+
+  /**
+   * The url for this request.
+   */
+  char *url;
+
+  /**
+   * Handle for the request.
+   */
+  struct GNUNET_CURL_Job *job;
+
+  /**
+   * Function to call with the result.
+   */
+  TALER_EXCHANGE_ManagementWireEnableCallback cb;
+
+  /**
+   * Closure for @a cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Reference to the execution context.
+   */
+  struct GNUNET_CURL_Context *ctx;
+};
 
 
 /**
@@ -62,4 +89,13 @@ TALER_EXCHANGE_management_enable_wire (
  */
 void
 TALER_EXCHANGE_management_enable_wire_cancel (
-  struct TALER_EXCHANGE_ManagementWireEnableHandle *wh);
+  struct TALER_EXCHANGE_ManagementWireEnableHandle *wh)
+{
+  if (NULL != wh->job)
+  {
+    GNUNET_CURL_job_cancel (wh->job);
+    wh->job = NULL;
+  }
+  GNUNET_free (wh->url);
+  GNUNET_free (wh);
+}

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