1 | // Copyright (c) Microsoft. All rights reserved.
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2 | // Licensed under the MIT license. See LICENSE file in the project root for full license information.
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3 |
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4 | #include <stdio.h>
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5 | #include <stdlib.h>
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6 |
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7 | /* This sample uses the _LL APIs of iothub_client for example purposes.
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8 | That does not mean that HTTP only works with the _LL APIs.
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9 | Simply changing the using the convenience layer (functions not having _LL)
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10 | and removing calls to _DoWork will yield the same results. */
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11 |
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12 | #include "azure_c_shared_utility/threadapi.h"
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13 | #include "azure_c_shared_utility/crt_abstractions.h"
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14 | #include "azure_c_shared_utility/platform.h"
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15 | #include "azure_c_shared_utility/shared_util_options.h"
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16 | #include "iothub_client_ll.h"
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17 | #include "iothub_message.h"
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18 | #include "iothubtransporthttp.h"
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19 | #include "iothubtransportmqtt_websockets.h"
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20 |
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21 | #ifdef _MSC_VER
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22 | extern int sprintf_s(char* dst, size_t dstSizeInBytes, const char* format, ...);
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23 | #endif // _MSC_VER
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24 |
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25 | #if 1//def MBED_BUILD_TIMESTAMP
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26 | #define SET_TRUSTED_CERT_IN_SAMPLES
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27 | #endif // MBED_BUILD_TIMESTAMP
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28 |
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29 | #ifdef SET_TRUSTED_CERT_IN_SAMPLES
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30 | #include "certs.h"
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31 | #endif // SET_TRUSTED_CERT_IN_SAMPLES
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32 |
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33 | /*String containing Hostname, Device Id & Device Key in the format: */
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34 | /* "HostName=<host_name>;DeviceId=<device_id>;SharedAccessKey=<device_key>" */
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35 | /* "HostName=<host_name>;DeviceId=<device_id>;SharedAccessSignature=<device_sas_token>" */
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36 | static const char* connectionString = "[device connection string]";
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37 |
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38 |
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39 | static int callbackCounter;
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40 | static bool g_continueRunning;
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41 | static char msgText[1024];
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42 | static char propText[1024];
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43 | #define MESSAGE_COUNT 5
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44 | #define DOWORK_LOOP_NUM 3
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45 |
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46 |
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47 | typedef struct EVENT_INSTANCE_TAG
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48 | {
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49 | IOTHUB_MESSAGE_HANDLE messageHandle;
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50 | size_t messageTrackingId; // For tracking the messages within the user callback.
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51 | } EVENT_INSTANCE;
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52 |
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53 | static IOTHUBMESSAGE_DISPOSITION_RESULT ReceiveMessageCallback(IOTHUB_MESSAGE_HANDLE message, void* userContextCallback)
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54 | {
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55 | int* counter = (int*)userContextCallback;
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56 | const char* buffer;
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57 | size_t size;
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58 | MAP_HANDLE mapProperties;
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59 | const char* messageId;
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60 | const char* correlationId;
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61 | const char* contentType;
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62 | const char* contentEncoding;
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63 |
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64 | // Message properties
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65 | if ((messageId = IoTHubMessage_GetMessageId(message)) == NULL)
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66 | {
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67 | messageId = "<null>";
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68 | }
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69 |
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70 | if ((correlationId = IoTHubMessage_GetCorrelationId(message)) == NULL)
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71 | {
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72 | correlationId = "<null>";
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73 | }
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74 |
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75 | if ((contentType = IoTHubMessage_GetContentTypeSystemProperty(message)) == NULL)
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76 | {
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77 | contentType = "<null>";
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78 | }
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79 |
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80 | if ((contentEncoding = IoTHubMessage_GetContentEncodingSystemProperty(message)) == NULL)
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81 | {
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82 | contentEncoding = "<null>";
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83 | }
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84 |
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85 | // Message content
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86 | if (IoTHubMessage_GetByteArray(message, (const unsigned char**)&buffer, &size) != IOTHUB_MESSAGE_OK)
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87 | {
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88 | printf("unable to retrieve the message data\r\n");
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89 | }
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90 | else
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91 | {
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92 | (void)printf("Received Message [%d]\r\n Message ID: %s\r\n Correlation ID: %s\r\n Content-Type: %s\r\n Content-Encoding: %s\r\n Data: <<<%.*s>>> & Size=%d\r\n",
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93 | *counter, messageId, correlationId, contentType, contentEncoding, (int)size, buffer, (int)size);
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94 | // If we receive the work 'quit' then we stop running
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95 | if (size == (strlen("quit") * sizeof(char)) && memcmp(buffer, "quit", size) == 0)
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96 | {
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97 | g_continueRunning = false;
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98 | }
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99 | }
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100 |
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101 | // Retrieve properties from the message
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102 | mapProperties = IoTHubMessage_Properties(message);
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103 | if (mapProperties != NULL)
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104 | {
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105 | const char*const* keys;
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106 | const char*const* values;
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107 | size_t propertyCount = 0;
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108 | if (Map_GetInternals(mapProperties, &keys, &values, &propertyCount) == MAP_OK)
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109 | {
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110 | if (propertyCount > 0)
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111 | {
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112 | size_t index;
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113 |
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114 | printf(" Message Properties:\r\n");
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115 | for (index = 0; index < propertyCount; index++)
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116 | {
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117 | (void)printf("\tKey: %s Value: %s\r\n", keys[index], values[index]);
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118 | }
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119 | (void)printf("\r\n");
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120 | }
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121 | }
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122 | }
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123 |
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124 | /* Some device specific action code goes here... */
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125 | (*counter)++;
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126 | return IOTHUBMESSAGE_ACCEPTED;
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127 | }
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128 |
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129 | static void SendConfirmationCallback(IOTHUB_CLIENT_CONFIRMATION_RESULT result, void* userContextCallback)
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130 | {
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131 | EVENT_INSTANCE* eventInstance = (EVENT_INSTANCE*)userContextCallback;
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132 |
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133 | (void)printf("Confirmation[%d] received for message tracking id = %zu with result = %s\r\n", callbackCounter, eventInstance->messageTrackingId, MU_ENUM_TO_STRING(IOTHUB_CLIENT_CONFIRMATION_RESULT, result));
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134 |
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135 | /* Some device specific action code goes here... */
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136 | callbackCounter++;
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137 | IoTHubMessage_Destroy(eventInstance->messageHandle);
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138 | }
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139 |
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140 | void iothub_client_run(void)
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141 | {
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142 | IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle;
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143 |
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144 | EVENT_INSTANCE messages[MESSAGE_COUNT];
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145 | double avgWindSpeed = 10.0;
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146 | double minTemperature = 20.0;
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147 | double minHumidity = 60.0;
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148 | int receiveContext = 0;
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149 |
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150 | g_continueRunning = true;
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151 |
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152 | srand((unsigned int)time(NULL));
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153 |
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154 | callbackCounter = 0;
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155 |
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156 | if (platform_init() != 0)
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157 | {
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158 | (void)printf("Failed to initialize the platform.\r\n");
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159 | }
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160 | else
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161 | {
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162 | #if 1
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163 | (void)printf("Starting the IoTHub client sample HTTP...\r\n");
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164 | IOTHUB_CLIENT_TRANSPORT_PROVIDER protocol = HTTP_Protocol;
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165 | #else
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166 | (void)printf("Starting the IoTHub client sample MQTT...\r\n");
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167 | IOTHUB_CLIENT_TRANSPORT_PROVIDER protocol = MQTT_WebSocket_Protocol;
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168 | #endif
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169 |
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170 | if ((iotHubClientHandle = IoTHubClient_LL_CreateFromConnectionString(connectionString, protocol)) == NULL)
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171 | {
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172 | (void)printf("ERROR: iotHubClientHandle is NULL!\r\n");
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173 | }
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174 | else
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175 | {
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176 | #if 0
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177 | HTTP_PROXY_OPTIONS proxy_options;
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178 | proxy_options.host_address = "proxy.example.com";
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179 | proxy_options.port = 8080;
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180 | proxy_options.username = NULL;
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181 | proxy_options.password = NULL;
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182 | if (IoTHubClient_LL_SetOption(iotHubClientHandle, OPTION_HTTP_PROXY, &proxy_options) != IOTHUB_CLIENT_OK)
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183 | {
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184 | printf("failure to set option \"HTTP Proxy\"\r\n");
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185 | }
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186 |
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187 | long curl_verbose = 1;
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188 | if (IoTHubClient_LL_SetOption(iotHubClientHandle, OPTION_CURL_VERBOSE, &curl_verbose) != IOTHUB_CLIENT_OK)
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189 | {
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190 | printf("failure to set option \"CURL Verbose\"\r\n");
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191 | }
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192 | #endif
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193 | unsigned int timeout = 241000;
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194 | // Because it can poll "after 9 seconds" polls will happen effectively // at ~10 seconds.
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195 | // Note that for scalabilty, the default value of minimumPollingTime
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196 | // is 25 minutes. For more information, see:
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197 | // https://azure.microsoft.com/documentation/articles/iot-hub-devguide/#messaging
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198 | unsigned int minimumPollingTime = 9;
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199 | if (IoTHubClient_LL_SetOption(iotHubClientHandle, "timeout", &timeout) != IOTHUB_CLIENT_OK)
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200 | {
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201 | printf("failure to set option \"timeout\"\r\n");
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202 | }
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203 |
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204 | if (IoTHubClient_LL_SetOption(iotHubClientHandle, "MinimumPollingTime", &minimumPollingTime) != IOTHUB_CLIENT_OK)
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205 | {
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206 | printf("failure to set option \"MinimumPollingTime\"\r\n");
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207 | }
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208 |
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209 | #ifdef SET_TRUSTED_CERT_IN_SAMPLES
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210 | // For mbed add the certificate information
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211 | if (IoTHubClient_LL_SetOption(iotHubClientHandle, OPTION_TRUSTED_CERT, certificates) != IOTHUB_CLIENT_OK)
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212 | {
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213 | printf("failure to set option \"TrustedCerts\"\r\n");
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214 | }
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215 | #endif // SET_TRUSTED_CERT_IN_SAMPLES
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216 | /* Setting Message call back, so we can receive Commands. */
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217 | if (IoTHubClient_LL_SetMessageCallback(iotHubClientHandle, ReceiveMessageCallback, &receiveContext) != IOTHUB_CLIENT_OK)
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218 | {
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219 | (void)printf("ERROR: IoTHubClient_LL_SetMessageCallback..........FAILED!\r\n");
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220 | }
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221 | else
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222 | {
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223 | (void)printf("IoTHubClient_LL_SetMessageCallback...successful.\r\n");
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224 |
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225 | /* Now that we are ready to receive commands, let's send some messages */
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226 | int iterator = 0;
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227 | double temperature = 0;
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228 | double humidity = 0;
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229 | do
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230 | {
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231 | //(void)printf("iterator: [%d], callbackCounter: [%d]. \r\n", iterator, callbackCounter);
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232 |
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233 | if (iterator < MESSAGE_COUNT && (iterator <= callbackCounter))
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234 | {
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235 | temperature = minTemperature + (rand() % 10);
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236 | humidity = minHumidity + (rand() % 20);
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237 | sprintf_s(msgText, sizeof(msgText), "{\"windSpeed\":%.2f,\"temperature\":%.2f,\"humidity\":%.2f}", avgWindSpeed + (rand() % 4 + 2), temperature, humidity);
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238 | if ((messages[iterator].messageHandle = IoTHubMessage_CreateFromByteArray((const unsigned char*)msgText, strlen(msgText))) == NULL)
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239 | {
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240 | (void)printf("ERROR: iotHubMessageHandle is NULL!\r\n");
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241 | }
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242 | else
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243 | {
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244 | MAP_HANDLE propMap;
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245 |
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246 | messages[iterator].messageTrackingId = iterator;
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247 |
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248 | propMap = IoTHubMessage_Properties(messages[iterator].messageHandle);
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249 | (void)sprintf_s(propText, sizeof(propText), temperature > 28 ? "true" : "false");
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250 | if (Map_AddOrUpdate(propMap, "temperatureAlert", propText) != MAP_OK)
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251 | {
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252 | (void)printf("ERROR: Map_AddOrUpdate Failed!\r\n");
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253 | }
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254 |
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255 | (void)IoTHubMessage_SetContentTypeSystemProperty(messages[iterator].messageHandle, "application/json");
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256 | (void)IoTHubMessage_SetContentEncodingSystemProperty(messages[iterator].messageHandle, "utf-8");
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257 |
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258 | if (IoTHubClient_LL_SendEventAsync(iotHubClientHandle, messages[iterator].messageHandle, SendConfirmationCallback, &messages[iterator]) != IOTHUB_CLIENT_OK)
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259 | {
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260 | (void)printf("ERROR: IoTHubClient_LL_SendEventAsync..........FAILED!\r\n");
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261 | }
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262 | else
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263 | {
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264 | (void)printf("IoTHubClient_LL_SendEventAsync accepted message [%d] for transmission to IoT Hub.\r\n", iterator);
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265 | }
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266 | }
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267 | }
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268 |
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269 | IoTHubClient_LL_DoWork(iotHubClientHandle);
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270 | ThreadAPI_Sleep(1);
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271 |
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272 | iterator++;
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273 |
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274 | if (callbackCounter >= MESSAGE_COUNT)
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275 | {
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276 | printf("exit\n");
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277 | break;
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278 | }
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279 | } while (g_continueRunning);
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280 |
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281 | (void)printf("iothub_client_sample_http has gotten quit message, call DoWork %d more time to complete final sending...\r\n", DOWORK_LOOP_NUM);
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282 | for (size_t index = 0; index < DOWORK_LOOP_NUM; index++)
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283 | {
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284 | IoTHubClient_LL_DoWork(iotHubClientHandle);
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285 | ThreadAPI_Sleep(1);
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286 | }
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287 | }
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288 | IoTHubClient_LL_Destroy(iotHubClientHandle);
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289 | }
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290 | platform_deinit();
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291 | }
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292 | }
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293 |
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294 | int iothub_client_main(int argc, char **argv)
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295 | {
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296 | iothub_client_run();
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297 | return 0;
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298 | }
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