Merge pull request #4456 from telefonicaid/feature/4449_notification_…

…payload_in_logs

ADD notification payload in INFO log traces

CHANGES_NEXT_RELEASE

@@ -1,5 +1,6 @@
 - Add: servicePath field to builtin attributes (#2877)
 - Add: notification.mqtt.retain and notification.mqttCustom.retain flag for MQTT retain in notifications (#4388)
+- Add: notification payload in INFO log traces (#4449)
 - Fix: correctly detect JSON attribute and metadata value changes in subscription triggering logic (#4211, #4434, #643)
 - Fix: DateTime and geo:json types were not supported in custom notifications using ngsi patching (#4435)
 - Fix: logDeprecate not working correctly (`geo:json` wrongly considered as deprecated)

doc/manuals/admin/logs.md

@@ -170,13 +170,13 @@ time=2020-10-26T10:32:41.724Z | lvl=INFO | corr=93bdc5b4-1776-11eb-954d-000c29df
   different value for the correlator.
 
 ```
-time=2020-10-26T10:32:22.145Z | lvl=INFO | corr=87f708a8-1776-11eb-b327-000c29df7908; cbnotif=1 | trans=1603707992-318-00000000003 | from=0.0.0.0 | srv=s1| subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f914177334436ea590f6edb): POST localhost:1028/accumulate, response code: 200
+time=2020-10-26T10:32:22.145Z | lvl=INFO | corr=87f708a8-1776-11eb-b327-000c29df7908; cbnotif=1 | trans=1603707992-318-00000000003 | from=0.0.0.0 | srv=s1| subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f914177334436ea590f6edb): POST localhost:1028/accumulate, payload (123 bytes): {"subscriptionId":"5f914177334436ea590f6edb","data":[{"id":"E","type":"T","A":{"type":"Number","value":42,"metadata":{}}}]}, response code: 200
 ```
 
 * In the case of MQTT notifications the `msg` field of the above trace is slightly different:
 
 ```
-time=2020-10-26T10:32:22.145Z | lvl=INFO | corr=87f708a8-1776-11eb-b327-000c29df7908; cbnotif=1 | trans=1603707992-318-00000000003 | from=0.0.0.0 | srv=s1| subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoMqttNotification | msg=MQTT Notif delivered (subId: 60ffea6c1bca454f9a64c96c): broker: localhost:1883, topic: sub2
+time=2020-10-26T10:32:22.145Z | lvl=INFO | corr=87f708a8-1776-11eb-b327-000c29df7908; cbnotif=1 | trans=1603707992-318-00000000003 | from=0.0.0.0 | srv=s1| subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoMqttNotification | msg=MQTT Notif delivered (subId: 60ffea6c1bca454f9a64c96c): broker: localhost:1883, topic: sub2, payload (123 bytes): {"subscriptionId":"60ffea6c1bca454f9a64c96c","data":[{"id":"E","type":"T","A":{"type":"Number","value":42,"metadata":{}}}]}
 ```
 
 * For each forwarded request to a [Context Provider](../user/context_providers.md) (either queries or updates),
@@ -200,7 +200,7 @@ Some additional considerations:
   occurs. For instance:
 
 ```
-time=2020-10-26T10:32:22.145Z | lvl=INFO | corr=87f708a8-1776-11eb-b327-000c29df7908; cbnotif=1 | trans=1603707992-318-00000000003 | from=0.0.0.0 | srv=s1| subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f914177334436ea590f6edb): POST localhost:1028/accumulate, response code: Couldn't connect to server
+time=2020-10-26T10:32:22.145Z | lvl=INFO | corr=87f708a8-1776-11eb-b327-000c29df7908; cbnotif=1 | trans=1603707992-318-00000000003 | from=0.0.0.0 | srv=s1| subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f914177334436ea590f6edb): POST localhost:1028/accumulate, payload (123 bytes): {"subscriptionId":"5f914177334436ea590f6edb","data":[{"id":"E","type":"T","A":{"type":"Number","value":42,"metadata":{}}}]}, response code: Couldn't connect to server
 ```
 
 * When a client request triggers forwarding to Context Providers, a `Starting forwarding for <client request URL>`
@@ -346,56 +346,56 @@ contextBroker -fg -httpTimeout 10000 -logLevel INFO -notificationMode threadpool
 Successful sent (response code 200):
 
 ```
-time=2020-10-26T14:48:37.192Z | lvl=INFO | corr=54393a44-179a-11eb-bb87-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000006 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e174b14e7532482ac794): POST localhost:1028/accumulate, response code: 200
+time=2020-10-26T14:48:37.192Z | lvl=INFO | corr=54393a44-179a-11eb-bb87-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000006 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e174b14e7532482ac794): POST localhost:1028/accumulate, payload (123 bytes): {"subscriptionId":"5f96e174b14e7532482ac794","data":[{"id":"E","type":"T","A":{"type":"Number","value":42,"metadata":{}}}]}, response code: 200
 ```
 
 Notification endpoint response with 400 (a WARN trace is printed):
 
 ```
 time=2020-10-26T14:49:34.619Z | lvl=WARN | corr=7689f6ba-179a-11eb-ac4c-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000009 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=httpRequestSend.cpp[583]:httpRequestSend | msg=Notification (subId: 5f96e1fdb14e7532482ac795) response NOT OK, http code: 400
-time=2020-10-26T14:49:34.619Z | lvl=INFO | corr=7689f6ba-179a-11eb-ac4c-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000009 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e1fdb14e7532482ac795): POST localhost:1028/giveme400, response code: 400
+time=2020-10-26T14:49:34.619Z | lvl=INFO | corr=7689f6ba-179a-11eb-ac4c-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000009 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e1fdb14e7532482ac795): POST localhost:1028/giveme400, payload (123 bytes): {"subscriptionId":"5f96e1fdb14e7532482ac795","data":[{"id":"E","type":"T","A":{"type":"Number","value":42,"metadata":{}}}]}, response code: 400
 ```
 
 Notification endpoint response with 404 (a WARN trace is printed):
 
 ```
 time=2020-10-26T14:51:40.764Z | lvl=WARN | corr=c1b8e9c0-179a-11eb-9edc-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000012 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=httpRequestSend.cpp[583]:httpRequestSend | msg=Notification (subId: 5f96e27cb14e7532482ac796) response NOT OK, http code: 404
-time=2020-10-26T14:51:40.764Z | lvl=INFO | corr=c1b8e9c0-179a-11eb-9edc-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000012 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e27cb14e7532482ac796): POST localhost:1028/giveme404, response code: 404
+time=2020-10-26T14:51:40.764Z | lvl=INFO | corr=c1b8e9c0-179a-11eb-9edc-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000012 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e27cb14e7532482ac796): POST localhost:1028/giveme404, payload (123 bytes): {"subscriptionId":"5f96e27cb14e7532482ac796","data":[{"id":"E","type":"T","A":{"type":"Number","value":42,"metadata":{}}}]}, response code: 404
 ```
 
 Notification endpoint response with 500 (a WARN trace is printed)
 
 ```
 time=2020-10-26T14:53:04.246Z | lvl=WARN | corr=f37b5024-179a-11eb-9ce6-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000015 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=httpRequestSend.cpp[583]:httpRequestSend | msg=Notification (subId: 5f96e2cfb14e7532482ac797) response NOT OK, http code: 500
-time=2020-10-26T14:53:04.247Z | lvl=INFO | corr=f37b5024-179a-11eb-9ce6-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000015 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e2cfb14e7532482ac797): POST localhost:1028/giveme500, response code: 500
+time=2020-10-26T14:53:04.247Z | lvl=INFO | corr=f37b5024-179a-11eb-9ce6-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000015 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e2cfb14e7532482ac797): POST localhost:1028/giveme500, payload (123 bytes): {"subscriptionId":"5f96e2cfb14e7532482ac797","data":[{"id":"E","type":"T","A":{"type":"Number","value":42,"metadata":{}}}]}, response code: 500
 ```
 
 Endpoint not responding within 10 seconds timeout or some other connection error (alarm is raised in WARN level):
 
 ```
 time=2020-10-26T14:54:15.996Z | lvl=WARN | corr=184b8b80-179b-11eb-9c52-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000018 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=AlarmManager.cpp[328]:notificationError | msg=Raising alarm NotificationError localhost:1028/givemeDelay: notification failure for queue worker: Timeout was reached
-time=2020-10-26T14:54:15.996Z | lvl=INFO | corr=184b8b80-179b-11eb-9c52-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000018 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e30db14e7532482ac798): POST localhost:1028/givemeDelay, response code: Timeout was reached
+time=2020-10-26T14:54:15.996Z | lvl=INFO | corr=184b8b80-179b-11eb-9c52-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000018 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e30db14e7532482ac798): POST localhost:1028/givemeDelay, payload (123 bytes): {"subscriptionId":"5f96e30db14e7532482ac798","data":[{"id":"E","type":"T","A":{"type":"Number","value":42,"metadata":{}}}]}, response code: Timeout was reached
 ```
 
 Endpoint in not responding port, e.g. localhost:9999 (alarm is raised in WARN log level):
 
 ```
 time=2020-10-26T15:01:50.659Z | lvl=WARN | corr=2d3e4cfc-179c-11eb-b667-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000030 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=AlarmManager.cpp[328]:notificationError | msg=Raising alarm NotificationError localhost:9999/giveme: notification failure for queue worker: Couldn't connect to server
-time=2020-10-26T15:01:50.659Z | lvl=INFO | corr=2d3e4cfc-179c-11eb-b667-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000030 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e4deb14e7532482ac79c): POST localhost:9999/giveme, response code: Couldn't connect to server
+time=2020-10-26T15:01:50.659Z | lvl=INFO | corr=2d3e4cfc-179c-11eb-b667-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000030 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e4deb14e7532482ac79c): POST localhost:9999/giveme, payload (123 bytes): {"subscriptionId":"5f96e4deb14e7532482ac79c","data":[{"id":"E","type":"T","A":{"type":"Number","value":42,"metadata":{}}}]}, response code: Couldn't connect to server
 ```
 
 Endpoint in unresolvable name, e.g. foo.bar.bar.com (alarm is raised in WARN log level):
 
 ```
 time=2020-10-26T15:03:54.258Z | lvl=WARN | corr=769f8d8e-179c-11eb-960f-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000033 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=AlarmManager.cpp[328]:notificationError | msg=Raising alarm NotificationError foo.bar.bar.com:9999/giveme: notification failure for queue worker: Couldn't resolve host name
-time=2020-10-26T15:03:54.258Z | lvl=INFO | corr=769f8d8e-179c-11eb-960f-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000033 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e559b14e7532482ac79d): POST foo.bar.bar.com:9999/giveme, response code: Couldn't resolve host name
+time=2020-10-26T15:03:54.258Z | lvl=INFO | corr=769f8d8e-179c-11eb-960f-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000033 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e559b14e7532482ac79d): POST foo.bar.bar.com:9999/giveme, payload (123 bytes): {"subscriptionId":"5f96e559b14e7532482ac79d","data":[{"id":"E","type":"T","A":{"type":"Number","value":42,"metadata":{}}}]}, response code: Couldn't resolve host name
 ```
 
 Endpoint in unreachable IP, e.g. 12.34.56.87 (alarm is raised in WARN log level):
 
 ```
 time=2020-10-26T15:06:14.642Z | lvl=WARN | corr=c4a3192e-179c-11eb-ac8f-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000036 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=AlarmManager.cpp[328]:notificationError | msg=Raising alarm NotificationError 12.34.56.78:9999/giveme: notification failure for queue worker: Timeout was reached
-time=2020-10-26T15:06:14.642Z | lvl=INFO | corr=c4a3192e-179c-11eb-ac8f-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000036 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e5dbb14e7532482ac79e): POST 12.34.56.78:9999/giveme, response code: Timeout was reached
+time=2020-10-26T15:06:14.642Z | lvl=INFO | corr=c4a3192e-179c-11eb-ac8f-000c29df7908; cbnotif=1 | trans=1603722272-416-00000000036 | from=0.0.0.0 | srv=s1 | subsrv=/A | comp=Orion | op=logTracing.cpp[63]:logInfoHttpNotification | msg=Notif delivered (subId: 5f96e5dbb14e7532482ac79e): POST 12.34.56.78:9999/giveme, payload (123 bytes): {"subscriptionId":"5f96e5dbb14e7532482ac79e","data":[{"id":"E","type":"T","A":{"type":"Number","value":42,"metadata":{}}}]}, response code: Timeout was reached
 ```
 
 [Top](#top)

src/lib/common/logTracing.cpp

@@ -42,6 +42,28 @@ inline bool isNgsiV1Url(const char* url)
 
 
 
+/* ****************************************************************************
+*
+* truncatePayload -
+*
+* NOTE: this function allocated dynamic memory, be careful with memory leaks!
+*/
+static char* truncatePayload(const char* payload)
+{
+  // +5 due to "(...)"
+  // +1 due to '\0'
+  unsigned int truncatedPayloadLengh = logInfoPayloadMaxSize + 5 + 1;
+
+  char* truncatedPayload = (char*) malloc(logInfoPayloadMaxSize + 5 + 1);
+  strncpy(truncatedPayload, payload, logInfoPayloadMaxSize);
+  strncpy(truncatedPayload + logInfoPayloadMaxSize, "(...)", 5);
+  truncatedPayload[truncatedPayloadLengh - 1] = '\0';
+
+  return truncatedPayload;
+}
+
+
+
 /* ****************************************************************************
 *
 * logInfoNotification - rc as int
@@ -52,12 +74,13 @@ void logInfoHttpNotification
   const char*  endpoint,
   const char*  verb,
   const char*  resource,
+  const char*  payload,
   int          rc
 )
 {
   char buffer[STRING_SIZE_FOR_INT];
   snprintf(buffer, sizeof(buffer), "%d", rc);
-  logInfoHttpNotification(subId, endpoint, verb, resource, buffer);
+  logInfoHttpNotification(subId, endpoint, verb, resource, payload, buffer);
 }
 
 
@@ -72,10 +95,29 @@ void logInfoHttpNotification
   const char*  endpoint,
   const char*  verb,
   const char*  resource,
+  const char*  payload,
   const char*  rc
 )
 {
-  LM_I(("Notif delivered (subId: %s): %s %s%s, response code: %s", subId, verb, endpoint, resource, rc));
+  bool cleanAfterUse = false;
+  char* effectivePayload;
+
+  if (strlen(payload) > logInfoPayloadMaxSize)
+  {
+    effectivePayload = truncatePayload(payload);
+    cleanAfterUse = true;
+  }
+  else
+  {
+    effectivePayload = (char*) payload;
+  }
+
+  LM_I(("Notif delivered (subId: %s): %s %s%s, payload (%d bytes): %s, response code: %s", subId, verb, endpoint, resource, strlen(payload), effectivePayload, rc));
+
+  if (cleanAfterUse)
+  {
+    free(effectivePayload);
+  }
 }
 
 
@@ -88,10 +130,29 @@ void logInfoMqttNotification
 (
   const char*  subId,
   const char*  endpoint,
-  const char*  resource
+  const char*  resource,
+  const char*  payload
 )
 {
-  LM_I(("MQTT Notif delivered (subId: %s): broker: %s, topic: %s", subId, endpoint, resource));
+  bool cleanAfterUse = false;
+  char* effectivePayload;
+
+  if (strlen(payload) > logInfoPayloadMaxSize)
+  {
+    effectivePayload = truncatePayload(payload);
+    cleanAfterUse = true;
+  }
+  else
+  {
+    effectivePayload = (char*) payload;
+  }
+
+  LM_I(("MQTT Notif delivered (subId: %s): broker: %s, topic: %s, payload (%d bytes): %s", subId, endpoint, resource, strlen(payload), effectivePayload));
+
+  if (cleanAfterUse)
+  {
+    free(effectivePayload);
+  }
 }
 
 
@@ -117,28 +178,6 @@ void logInfoRequestWithoutPayload
 
 
 
-/* ****************************************************************************
-*
-* truncatePayload -
-*
-* NOTE: this function allocated dynamic memory, be careful with memory leaks!
-*/
-static char* truncatePayload(const char* payload)
-{
-  // +5 due to "(...)"
-  // +1 due to '\0'
-  unsigned int truncatedPayloadLengh = logInfoPayloadMaxSize + 5 + 1;
-
-  char* truncatedPayload = (char*) malloc(logInfoPayloadMaxSize + 5 + 1);
-  strncpy(truncatedPayload, payload, logInfoPayloadMaxSize);
-  strncpy(truncatedPayload + logInfoPayloadMaxSize, "(...)", 5);
-  truncatedPayload[truncatedPayloadLengh - 1] = '\0';
-
-  return truncatedPayload;
-}
-
-
-
 /* ****************************************************************************
 *
 * logInfoRequestWithPayload -

src/lib/common/logTracing.h

@@ -32,29 +32,31 @@
 
 /* ****************************************************************************
 *
-* logInfoNotification - rc as int
+* logInfoHttpNotification - rc as int
 */
 extern void logInfoHttpNotification
 (
   const char*  subId,
   const char*  endpoint,
   const char*  verb,
   const char*  resource,
+  const char*  payload,
   int          rc
 );
 
 
 
 /* ****************************************************************************
 *
-* logInfoNotification - rc as string
+* logInfoHttpNotification - rc as string
 */
 extern void logInfoHttpNotification
 (
   const char*  subId,
   const char*  endpoint,
   const char*  verb,
   const char*  resource,
+  const char*  payload,
   const char*  rc
 );
 
@@ -68,7 +70,8 @@ extern void logInfoMqttNotification
 (
   const char*  subId,
   const char*  endpoint,
-  const char*  resource
+  const char*  resource,
+  const char*  payload
 );
 
 

src/lib/ngsiNotify/doNotify.cpp

@@ -127,11 +127,11 @@ static void doNotifyHttp(SenderThreadParams* params, CURL* curl, SyncQOverflow<S
   // Add notificacion result summary in log INFO level
   if (statusCode != -1)
   {
-    logInfoHttpNotification(params->subscriptionId.c_str(), endpoint.c_str(), params->verb.c_str(), params->resource.c_str(), statusCode);
+    logInfoHttpNotification(params->subscriptionId.c_str(), endpoint.c_str(), params->verb.c_str(), params->resource.c_str(), params->content.c_str(), statusCode);
   }
   else
   {
-    logInfoHttpNotification(params->subscriptionId.c_str(), endpoint.c_str(), params->verb.c_str(), params->resource.c_str(), out.c_str());
+    logInfoHttpNotification(params->subscriptionId.c_str(), endpoint.c_str(), params->verb.c_str(), params->resource.c_str(), params->content.c_str(), out.c_str());
   }
 }
 
@@ -164,7 +164,7 @@ static void doNotifyMqtt(SenderThreadParams* params)
     // mqttOnPublishCallback is called (by the moment we are not doing nothing there, just printing in
     // DEBUG log level). Note however that even if mqttOnPublishCallback() is called there is no actual
     // guarantee if MQTT QoS is 0
-    logInfoMqttNotification(params->subscriptionId.c_str(), endpoint.c_str(), params->resource.c_str());
+    logInfoMqttNotification(params->subscriptionId.c_str(), endpoint.c_str(), params->resource.c_str(), params->content.c_str());
     subNotificationErrorStatus(params->tenant, params->subscriptionId, false, -1, "");
   }
   else

test/functionalTest/cases/0000_deprecated_checkings/log_deprecate_warning.test

@@ -31,7 +31,7 @@ brokerStart CB 0 IPV4 -logDeprecate
 
 #
 # 01. Query E1-T1
-# 02. GET /v1/contextEntities/E
+# 02. GET /v1/contextEntities/E/attributes/A
 # 03. Create entity using NGSIv1 metadata location
 # 04. Create entity using NGSIv1 and geo:point
 # 05. Create entity using NGSIv2 and geo:point