Diff: iothub_client_sample_http.c

Revision:

18:e3e29fc771c9

Child:

20:52f8298d7256

diff -r 944d5ed46429 -r e3e29fc771c9 iothub_client_sample_http.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/iothub_client_sample_http.c	Thu Oct 22 18:33:42 2015 -0700
@@ -0,0 +1,174 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+#include <stdio.h>
+#include <stdlib.h>
+
+/* This sample uses the _LL APIs of iothub_client for example purposes.
+   That does not mean that HTTP only works with the _LL APIs.
+   Simply changing the using the convenience layer (functions not having _LL)
+   and removing calls to _DoWork will yield the same results. */
+
+#include "iothub_client_ll.h"
+#include "iothub_message.h"
+#include "crt_abstractions.h"
+#include "iothubtransporthttp.h"
+
+#ifdef MBED_BUILD_TIMESTAMP
+#include "certs.h"
+#endif // MBED_BUILD_TIMESTAMP
+
+static const char* connectionString = "[device connection string]";
+static int callbackCounter;
+
+DEFINE_ENUM_STRINGS(IOTHUB_CLIENT_CONFIRMATION_RESULT, IOTHUB_CLIENT_CONFIRMATION_RESULT_VALUES);
+
+typedef struct EVENT_INSTANCE_TAG
+{
+    IOTHUB_MESSAGE_HANDLE messageHandle;
+    int messageTrackingId;  // For tracking the messages within the user callback.
+} EVENT_INSTANCE;
+
+static IOTHUBMESSAGE_DISPOSITION_RESULT ReceiveMessageCallback(IOTHUB_MESSAGE_HANDLE message, void* userContextCallback)
+{
+    int* counter = (int*)userContextCallback;
+    const char* buffer;
+    size_t size;
+    if (IoTHubMessage_GetByteArray(message, (const unsigned char**)&buffer, &size) != IOTHUB_MESSAGE_OK)
+    {
+        printf("unable to retrieve the message data\r\n");
+    }
+    else
+    {
+        (void)printf("Received Message [%d] with Data: <<<%.*s>>> & Size=%d\r\n", *counter, (int)size, buffer, (int)size);
+    }
+
+    // Retrieve properties from the message
+    MAP_HANDLE mapProperties = IoTHubMessage_Properties(message);
+    if (mapProperties != NULL)
+    {
+        const char*const* keys;
+        const char*const* values;
+        size_t propertyCount = 0;
+        if (Map_GetInternals(mapProperties, &keys, &values, &propertyCount) == MAP_OK)
+        {
+            if (propertyCount > 0)
+            {
+                printf("Message Properties:\r\n");
+                for (size_t index = 0; index < propertyCount; index++)
+                {
+                    printf("\tKey: %s Value: %s\r\n", keys[index], values[index]);
+                }
+                printf("\r\n");
+            }
+        }
+    }
+
+    /* Some device specific action code goes here... */
+    (*counter)++;
+    return IOTHUBMESSAGE_ACCEPTED;
+}
+
+static void SendConfirmationCallback(IOTHUB_CLIENT_CONFIRMATION_RESULT result, void* userContextCallback)
+{
+    EVENT_INSTANCE* eventInstance = (EVENT_INSTANCE*)userContextCallback;
+    (void)printf("Confirmation[%d] received for message tracking id = %d with result = %s\r\n", callbackCounter, eventInstance->messageTrackingId, ENUM_TO_STRING(IOTHUB_CLIENT_CONFIRMATION_RESULT, result));
+    /* Some device specific action code goes here... */
+    callbackCounter++;
+    IoTHubMessage_Destroy(eventInstance->messageHandle);
+}
+
+static char msgText[1024];
+static char propText[1024];
+#define MESSAGE_COUNT 5
+
+void iothub_client_sample_http_run(void)
+{
+    IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle;
+
+    EVENT_INSTANCE messages[MESSAGE_COUNT];
+
+    srand((unsigned int)time(NULL));
+    double avgWindSpeed = 10.0;
+
+    callbackCounter = 0;
+    int receiveContext = 0;
+
+    (void)printf("Starting the IoTHub client sample HTTP...\r\n");
+
+    if ((iotHubClientHandle = IoTHubClient_LL_CreateFromConnectionString(connectionString, HTTP_Protocol)) == NULL)
+    {
+        (void)printf("ERROR: iotHubClientHandle is NULL!\r\n");
+    }
+    else
+    {
+        unsigned int timeout = 241000;
+        if (IoTHubClient_LL_SetOption(iotHubClientHandle, "timeout", &timeout) != IOTHUB_CLIENT_OK)
+        {
+            printf("failure to set option \"timeout\"\r\n");
+        }
+
+        unsigned int minimumPollingTime = 9; /*because it can poll "after 9 seconds" polls will happen effectively at ~10 seconds*/
+        if (IoTHubClient_LL_SetOption(iotHubClientHandle, "MinimumPollingTime", &minimumPollingTime) != IOTHUB_CLIENT_OK)
+        {
+            printf("failure to set option \"MinimumPollingTime\"\r\n");
+        }
+
+#ifdef MBED_BUILD_TIMESTAMP
+        // For mbed add the certificate information
+        if (IoTHubClient_LL_SetOption(iotHubClientHandle, "TrustedCerts", certificates) != IOTHUB_CLIENT_OK)
+        {
+            printf("failure to set option \"TrustedCerts\"\r\n");
+        }
+#endif // MBED_BUILD_TIMESTAMP
+
+        /* Setting Message call back, so we can receive Commands. */
+        if (IoTHubClient_LL_SetMessageCallback(iotHubClientHandle, ReceiveMessageCallback, &receiveContext) != IOTHUB_CLIENT_OK)
+        {
+            (void)printf("ERROR: IoTHubClient_LL_SetMessageCallback..........FAILED!\r\n");
+        }
+        else
+        {
+            (void)printf("IoTHubClient_LL_SetMessageCallback...successful.\r\n");
+
+            /* Now that we are ready to receive commands, let's send some messages */
+            for (int i = 0; i < MESSAGE_COUNT; i++)
+            {
+                sprintf_s(msgText, sizeof(msgText), "{\"deviceId\": \"myFirstDevice\",\"windSpeed\": %.2f}", avgWindSpeed + (rand() % 4 + 2));
+                if ((messages[i].messageHandle = IoTHubMessage_CreateFromByteArray((const unsigned char*)msgText, strlen(msgText))) == NULL)
+                {
+                    (void)printf("ERROR: iotHubMessageHandle is NULL!\r\n");
+                }
+                else
+                {
+                    messages[i].messageTrackingId = i;
+
+                    MAP_HANDLE propMap = IoTHubMessage_Properties(messages[i].messageHandle);
+                    sprintf_s(propText, sizeof(propText), "PropMsg_%d", i);
+                    if (Map_AddOrUpdate(propMap, "PropName", propText) != MAP_OK)
+                    {
+                        (void)printf("ERROR: Map_AddOrUpdate Failed!\r\n");
+                    }
+
+                    if (IoTHubClient_LL_SendEventAsync(iotHubClientHandle, messages[i].messageHandle, SendConfirmationCallback, &messages[i]) != IOTHUB_CLIENT_OK)
+                    {
+                        (void)printf("ERROR: IoTHubClient_LL_SendEventAsync..........FAILED!\r\n");
+                    }
+                    else
+                    {
+                        (void)printf("IoTHubClient_LL_SendEventAsync accepted message [%d] for transmission to IoT Hub.\r\n", i);
+                    }
+                    
+                }
+            }
+        }
+
+        /* Wait for Commands. */
+        while (1)
+        {
+            IoTHubClient_LL_DoWork(iotHubClientHandle);
+        }
+
+        IoTHubClient_LL_Destroy(iotHubClientHandle);
+    }
+}