Microsoft Azure IoTHub client HTTP transport
Dependents: iothub_client_sample_http simplesample_http temp_sensor_anomaly
This library implements the HTTP transport for Microsoft Azure IoTHub client. The code is replicated from https://github.com/Azure/azure-iot-sdks
iothubtransporthttp.c
- Committer:
- AzureIoTClient
- Date:
- 2015-09-15
- Revision:
- 0:fa2b00dcd9d4
- Child:
- 1:2ba812f3d9b7
File content as of revision 0:fa2b00dcd9d4:
// Copyright (c) Microsoft. All rights reserved. // Licensed under the MIT license. See LICENSE file in the project root for full license information. #include <stdlib.h> #ifdef _CRTDBG_MAP_ALLOC #include <crtdbg.h> #endif #include "gballoc.h" #include <time.h> #include "iothub_client_private.h" #include "iothubtransporthttp.h" #include "httpapiexsas.h" #include "urlencode.h" #include "iot_logging.h" #include "httpapiex.h" #include "httpapiexsas.h" #include "strings.h" #include "base64.h" #include "doublylinkedlist.h" #include "httpheaders.h" #include "agenttime.h" #define IOTHUB_APP_PREFIX "iothub-app-" #define CONTENT_TYPE "Content-Type" #define APPLICATION_OCTET_STREAM "application/octet-stream" #define APPLICATION_VND_MICROSOFT_IOTHUB_JSON "application/vnd.microsoft.iothub.json" /*DEFAULT_GETMINIMUMPOLLINGTIME is the minimum time in seconds allowed between 2 consecutive GET issues to the service (GET=fetch notifications)*/ /*the default is 25 minutes*/ #define DEFAULT_GETMINIMUMPOLLINGTIME ((unsigned int)25*60) /*forward declaration*/ static int appendMapToJSON(STRING_HANDLE existing, const char* const* keys, const char* const* values, size_t count); /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_069: [This function shall return a pointer to a structure of type TRANSPORT_PROVIDER having the following values for its fields:] */ static TRANSPORT_PROVIDER thisTransportProvider = { IoTHubTransportHttp_SetOption, /*pfIoTHubTransport_SetOption IoTHubTransport_SetOption; */ IoTHubTransportHttp_Create, /*pfIoTHubTransport_Create IoTHubTransport_Create; */ IoTHubTransportHttp_Destroy, /*pfIoTHubTransport_Destroy IoTHubTransport_Destroy; */ IoTHubTransportHttp_Subscribe, /*pfIoTHubTransport_Subscribe IoTHubTransport_Subscribe; */ IoTHubTransportHttp_Unsubscribe, /*pfIoTHubTransport_Unsubscribe IoTHubTransport_Unsubscribe; */ IoTHubTransportHttp_DoWork, /*pfIoTHubTransport_DoWork IoTHubTransport_DoWork; */ IoTHubTransportHttp_GetSendStatus /* pfIoTHubTransport_GetSendStatus IoTHubTransport_GetSendStatus */ }; const void* IoTHubTransportHttp_ProvideTransportInterface(void) { return &thisTransportProvider; } typedef struct HTTPTRANSPORT_HANDLE_DATA_TAG { STRING_HANDLE eventHTTPrelativePath; STRING_HANDLE notificationHTTPrelativePath; HTTP_HEADERS_HANDLE eventHTTPrequestHeaders; STRING_HANDLE hostName; HTTPAPIEX_HANDLE httpApiExHandle; HTTP_HEADERS_HANDLE notificationHTTPrequestHeaders; STRING_HANDLE abandonHTTPrelativePathBegin; HTTPAPIEX_SAS_HANDLE sasObject; bool DoWork_PullNotification; bool doBatchedTransfers; bool isFirstPoll; unsigned int getMinimumPollingTime; time_t lastPollTime; PDLIST_ENTRY waitingToSend; DLIST_ENTRY eventConfirmations; /*holds items for event confirmations*/ }HTTPTRANSPORT_HANDLE_DATA; /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_003: [Otherwise IoTHubTransportHttp_Create shall create an immutable string (further called "event HTTP relative path") from the following pieces: "/devices/" + URL_ENCODED(config->upperConfig->deviceId) + "/messages/events?api-version=2015-08-15-preview".]*/ static void destroy_eventHTTPrelativePath(HTTPTRANSPORT_HANDLE_DATA* handleData) { STRING_delete(handleData->eventHTTPrelativePath); handleData->eventHTTPrelativePath = NULL; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_003: [Otherwise IoTHubTransportHttp_Create shall create an immutable string (further called "event HTTP relative path") from the following pieces: "/devices/" + URL_ENCODED(config->upperConfig->deviceId) + "/messages/events?api-version=2015-08-15-preview".]*/ static bool create_eventHTTPrelativePath(HTTPTRANSPORT_HANDLE_DATA* handleData, const IOTHUBTRANSPORT_CONFIG* config) { bool result; STRING_HANDLE urlEncodedDeviceId = NULL; handleData->eventHTTPrelativePath = STRING_construct("/devices/"); if (handleData->eventHTTPrelativePath == NULL) { result = false; } else if (!( ((urlEncodedDeviceId = URL_EncodeString(config->upperConfig->deviceId)) != NULL) && (STRING_concat_with_STRING(handleData->eventHTTPrelativePath, urlEncodedDeviceId) == 0) && (STRING_concat(handleData->eventHTTPrelativePath, EVENT_ENDPOINT API_VERSION) == 0) )) { destroy_eventHTTPrelativePath(handleData); result = false; } else { result = true; } STRING_delete(urlEncodedDeviceId); return result; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_034: [Otherwise, IoTHubTransportHttp_Create shall create an immutable string (further called "notification HTTP relative path") from the following pieces: "/devices/" + URL_ENCODED(config->upperConfig->deviceId) + "/messages/devicebound?api-version=2015-08-15-preview".]*/ static void destroy_notificationHTTPrelativePath(HTTPTRANSPORT_HANDLE_DATA* handleData) { STRING_delete(handleData->notificationHTTPrelativePath); handleData->notificationHTTPrelativePath = NULL; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_034: [Otherwise, IoTHubTransportHttp_Create shall create an immutable string (further called "notification HTTP relative path") from the following pieces: "/devices/" + URL_ENCODED(config->upperConfig->deviceId) + "/messages/devicebound?api-version=2015-08-15-preview".]*/ static bool create_notificationHTTPrelativePath(HTTPTRANSPORT_HANDLE_DATA* handleData, const IOTHUBTRANSPORT_CONFIG* config) { bool result; handleData->notificationHTTPrelativePath = STRING_construct("/devices/"); if (handleData->notificationHTTPrelativePath == NULL) { result = false; } else { STRING_HANDLE urlEncodedDeviceId = NULL; if (!( ((urlEncodedDeviceId = URL_EncodeString(config->upperConfig->deviceId)) != NULL) && (STRING_concat_with_STRING(handleData->notificationHTTPrelativePath, urlEncodedDeviceId) == 0) && (STRING_concat(handleData->notificationHTTPrelativePath, NOTIFICATION_ENDPOINT_HTTP API_VERSION) == 0) )) { result = false; destroy_notificationHTTPrelativePath(handleData); } else { result = true; } STRING_delete(urlEncodedDeviceId); } return result; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_005: [Otherwise, IoTHubTransportHttp_Create shall create a set of HTTP headers (further on called "event HTTP request headers") consisting of the following fixed field names and values: "iothub-to":"/devices/" + URL_ENCODED(config->upperConfig->deviceId) + "/messages/events"; "Authorization":" " "Content-Type":"application/vnd.microsoft.iothub.json" "Accept":"application/json" "Connection":"Keep-Alive"]*/ static void destroy_eventHTTPrequestHeaders(HTTPTRANSPORT_HANDLE_DATA* handleData) { HTTPHeaders_Free(handleData->eventHTTPrequestHeaders); handleData->eventHTTPrequestHeaders = NULL; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_005: [Otherwise, IoTHubTransportHttp_Create shall create a set of HTTP headers (further on called "event HTTP request headers") consisting of the following fixed field names and values: "iothub-to":"/devices/" + URL_ENCODED(config->upperConfig->deviceId) + "/messages/events"; "Authorization":" " "Content-Type":"application/vnd.microsoft.iothub.json" "Accept":"application/json" "Connection":"Keep-Alive"]*/ static bool create_eventHTTPrequestHeaders(HTTPTRANSPORT_HANDLE_DATA* handleData, const IOTHUBTRANSPORT_CONFIG* config) { bool result; handleData->eventHTTPrequestHeaders = HTTPHeaders_Alloc(); if (handleData->eventHTTPrequestHeaders == NULL) { result = false; } else { STRING_HANDLE temp = STRING_construct("/devices/"); if (temp == NULL) { result = false; destroy_eventHTTPrequestHeaders(handleData); } else { STRING_HANDLE urlEncodedDeviceId = NULL; if (!( ((urlEncodedDeviceId = URL_EncodeString(config->upperConfig->deviceId)) != NULL) && (STRING_concat_with_STRING(temp, urlEncodedDeviceId) == 0) && (STRING_concat(temp, EVENT_ENDPOINT) == 0) )) { result = false; destroy_eventHTTPrequestHeaders(handleData); } else { if (!( (HTTPHeaders_AddHeaderNameValuePair(handleData->eventHTTPrequestHeaders, "iothub-to", STRING_c_str(temp)) == HTTP_HEADERS_OK) && (HTTPHeaders_AddHeaderNameValuePair(handleData->eventHTTPrequestHeaders, "Authorization", " ") == HTTP_HEADERS_OK) && (HTTPHeaders_AddHeaderNameValuePair(handleData->eventHTTPrequestHeaders, "Accept", "application/json") == HTTP_HEADERS_OK) && (HTTPHeaders_AddHeaderNameValuePair(handleData->eventHTTPrequestHeaders, "Connection", "Keep-Alive") == HTTP_HEADERS_OK) )) { result = false; destroy_eventHTTPrequestHeaders(handleData); } else { result = true; } } STRING_delete(temp); STRING_delete(urlEncodedDeviceId); } } return result; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_007: [Otherwise, IoTHubTransportHttp_Create shall create an immutable string (further called hostname) containing config->upperConfig->iotHubName + config->upperConfig->iotHubSuffix.]*/ static void destroy_hostName(HTTPTRANSPORT_HANDLE_DATA* handleData) { STRING_delete(handleData->hostName); handleData->hostName = NULL; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_007: [Otherwise, IoTHubTransportHttp_Create shall create an immutable string (further called hostname) containing config->upperConfig->iotHubName + config->upperConfig->iotHubSuffix.]*/ static bool create_hostName(HTTPTRANSPORT_HANDLE_DATA* handleData, const IOTHUBTRANSPORT_CONFIG* config) { bool result; handleData->hostName = STRING_construct(config->upperConfig->iotHubName); if (handleData->hostName == NULL) { result = false; } else { if ((STRING_concat(handleData->hostName, ".") != 0) || (STRING_concat(handleData->hostName, config->upperConfig->iotHubSuffix) != 0)) { destroy_hostName(handleData); result = false; } else { result = true; } } return result; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_009: [Otherwise, IoTHubTransportHttp_Create shall create a HTTPAPIEX_HANDLE by a call to HTTPAPIEX_Create passing for hostName the hostname so far constructed by IoTHubTransportHttp_Create.]*/ static void destroy_httpApiExHandle(HTTPTRANSPORT_HANDLE_DATA* handleData) { HTTPAPIEX_Destroy(handleData->httpApiExHandle); handleData->httpApiExHandle = NULL; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_007: [Otherwise, IoTHubTransportHttp_Create shall create an immutable string (further called hostname) containing config->upperConfig->iotHubName + config->upperConfig->iotHubSuffix.]*/ static bool create_httpApiExHandle(HTTPTRANSPORT_HANDLE_DATA* handleData, const IOTHUBTRANSPORT_CONFIG* config) { bool result; (void)config; handleData->httpApiExHandle = HTTPAPIEX_Create(STRING_c_str(handleData->hostName)); if (handleData->httpApiExHandle == NULL) { result = false; } else { result = true; } return result; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_059: [Otherwise, IoTHubTransportHttp_Create shall create a set of HTTP headers (further on called "notification HTTP request headers") consisting of the following fixed field names and values: "Authorization": " "]*/ static void destroy_notificationHTTPrequestHeaders(HTTPTRANSPORT_HANDLE_DATA* handleData) { HTTPHeaders_Free(handleData->notificationHTTPrequestHeaders); handleData->notificationHTTPrequestHeaders = NULL; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_059: [Otherwise, IoTHubTransportHttp_Create shall create a set of HTTP headers (further on called "notification HTTP request headers") consisting of the following fixed field names and values: "Authorization": " "]*/ static bool create_notificationHTTPrequestHeaders(HTTPTRANSPORT_HANDLE_DATA* handleData, const IOTHUBTRANSPORT_CONFIG* config) { bool result; (void)config; handleData->notificationHTTPrequestHeaders = HTTPHeaders_Alloc(); if (handleData->notificationHTTPrequestHeaders == NULL) { result = false; } else { if (HTTPHeaders_AddHeaderNameValuePair(handleData->notificationHTTPrequestHeaders, "Authorization", " ") != HTTP_HEADERS_OK) { destroy_notificationHTTPrequestHeaders(handleData); result = false; } else { result = true; } } return result; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_061: [Otherwise, IoTHubTransportHttp_Create shall create a STRING containing: "/devices/" + URL_ENCODED(device id) +"/messages/deviceBound/" called abandonHTTPrelativePathBegin.] */ static void destroy_abandonHTTPrelativePathBegin(HTTPTRANSPORT_HANDLE_DATA* handleData) { STRING_delete(handleData->abandonHTTPrelativePathBegin); handleData->abandonHTTPrelativePathBegin = NULL; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_061: [Otherwise, IoTHubTransportHttp_Create shall create a STRING containing: "/devices/" + URL_ENCODED(device id) +"/messages/deviceBound/" called abandonHTTPrelativePathBegin.] */ static bool create_abandonHTTPrelativePathBegin(HTTPTRANSPORT_HANDLE_DATA* handleData, const IOTHUBTRANSPORT_CONFIG* config) { bool result; handleData->abandonHTTPrelativePathBegin = STRING_construct("/devices/"); if (handleData->abandonHTTPrelativePathBegin == NULL) { result = false; } else { STRING_HANDLE urlEncodedDeviceId = NULL; if (!( ((urlEncodedDeviceId = URL_EncodeString(config->upperConfig->deviceId)) != NULL) && (STRING_concat_with_STRING(handleData->abandonHTTPrelativePathBegin, urlEncodedDeviceId) == 0) && (STRING_concat(handleData->abandonHTTPrelativePathBegin, NOTIFICATION_ENDPOINT_HTTP_ETAG) == 0) )) { LogError("unable to STRING_concat\r\n"); STRING_delete(handleData->abandonHTTPrelativePathBegin); result = false; } else { result = true; } STRING_delete(urlEncodedDeviceId); } return result; } static void destroy_SASObject(HTTPTRANSPORT_HANDLE_DATA* handleData) { HTTPAPIEX_SAS_Destroy(handleData->sasObject); handleData->sasObject = NULL; } static bool create_deviceSASObject(HTTPTRANSPORT_HANDLE_DATA* handleData, const IOTHUBTRANSPORT_CONFIG* config) { STRING_HANDLE keyName; bool result; /*Codes_SRS_IOTHUBTRANSPORTTHTTP_06_001: [IoTHubTransportHttp_Create shall invoke URL_EncodeString with an argument of device id.]*/ keyName = URL_EncodeString(config->upperConfig->deviceId); if (keyName == NULL) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_06_002: [If the encode fails then IoTHubTransportHttp_Create shall fail and return NULL.]*/ result = false; } else { STRING_HANDLE uriResource; /*Codes_SRS_IOTHUBTRANSPORTTHTTP_06_003: [IoTHubTransportHttp_Create shall invoke STRING_clone using the previously created hostname.]*/ uriResource = STRING_clone(handleData->hostName); /*Codes_SRS_IOTHUBTRANSPORTTHTTP_06_004: [If the clone fails then IoTHubTransportHttp_Create shall fail and return NULL.]*/ if (uriResource != NULL) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_06_005: [IoTHubTransportHttp_Create shall invoke STRING_concat with arguments uriResource and the string "/devices/".]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_06_006: [If the concat fails then IoTHubTransportHttp_Create shall fail and return NULL.]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_06_007: [IoTHubTransportHttp_Create shall invoke STRING_concat_with_STRING with arguments uriResource and keyName.]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_06_008: [If the STRING_concat_with_STRING fails then IoTHubTransportHttp_Create shall fail and return NULL.]*/ if ((STRING_concat(uriResource, "/devices/") == 0) && (STRING_concat_with_STRING(uriResource, keyName) == 0)) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_06_009: [IoTHubTransportHttp_Create shall invoke STRING_construct with an argument of config->upperConfig->deviceKey.]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_06_010: [If the STRING_construct fails then IoTHubTransportHttp_Create shall fail and return NULL.]*/ STRING_HANDLE key = STRING_construct(config->upperConfig->deviceKey); if (key != NULL) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_06_013: [The keyName is shortened to zero length, if that fails then IoTHubTransportHttp_Create shall fail and return NULL.]*/ if (STRING_empty(keyName) != 0) { LogError("Unable to form the device key name for the SAS\r\n"); result = false; } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_06_011: [IoTHubTransportHttp_Create shall invoke HTTPAPIEX_SAS_Create with arguments key, uriResource, and zero length keyName.]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_06_012: [If the HTTPAPIEX_SAS_Create fails then IoTHubTransportHttp_Create shall fail and return NULL.]*/ handleData->sasObject = HTTPAPIEX_SAS_Create(key, uriResource, keyName); result = (handleData->sasObject != NULL) ? (true) : (false); } STRING_delete(key); } else { result = false; } } else { result = false; } STRING_delete(uriResource); } else { result = false; } STRING_delete(keyName); } return result; } TRANSPORT_HANDLE IoTHubTransportHttp_Create(const IOTHUBTRANSPORT_CONFIG* config) { HTTPTRANSPORT_HANDLE_DATA* result; /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_001: [If parameter config is NULL then IoTHubTransportHttp_Create shall fail and return NULL.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_002: [IoTHubTransportHttp_Create shall fail and return NULL if any fields of the config structure are NULL.] */ if (config == NULL) { LogError("invalid arg (configuration is missing)\r\n"); result = NULL; } else if (config->upperConfig == NULL) { LogError("invalid arg (upperConfig is NULL)\r\n"); result = NULL; } else if (config->waitingToSend == NULL) { LogError("invalid arg (waitingToSend is NULL)\r\n"); result = NULL; } else if (config->upperConfig->protocol == NULL) { LogError("invalid arg (protocol is NULL)\r\n"); result = NULL; } else if (config->upperConfig->deviceId == NULL) { LogError("invalid arg (deviceId is NULL)\r\n"); result = NULL; } else if (config->upperConfig->iotHubName == NULL) { LogError("invalid arg (iotHubName is NULL)\r\n"); result = NULL; } else if (config->upperConfig->iotHubSuffix == NULL) { LogError("invalid arg (iotHubSuffix is NULL)\r\n"); result = NULL; } else if (config->upperConfig->deviceKey == NULL) { LogError("invalid arg (deviceKey is NULL)\r\n"); result = NULL; } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_003: [Otherwise IoTHubTransportHttp_Create shall create an immutable string (further called "event HTTP relative path") from the following pieces: "/devices/" + URL_ENCODED(config->upperConfig->deviceId) + "/messages/events?api-version=2015-08-15-preview".]*/ result = (HTTPTRANSPORT_HANDLE_DATA*)malloc(sizeof(HTTPTRANSPORT_HANDLE_DATA)); if (result == NULL) { LogError("unable to malloc\r\n"); } else { bool was_eventHTTPrelativePath_ok = create_eventHTTPrelativePath(result, config); bool was_notificationHTTPrelativePath_ok = was_eventHTTPrelativePath_ok && create_notificationHTTPrelativePath(result, config); bool was_eventHTTPrequestHeaders_ok = was_notificationHTTPrelativePath_ok && create_eventHTTPrequestHeaders(result, config); bool was_hostName_ok = was_eventHTTPrequestHeaders_ok && create_hostName(result, config); bool was_httpApiExHandle_ok = was_hostName_ok && create_httpApiExHandle(result, config); bool was_notificationHTTPrequestHeaders_ok = was_httpApiExHandle_ok && create_notificationHTTPrequestHeaders(result, config); bool was_abandonHTTPrelativePathBegin_ok = was_notificationHTTPrequestHeaders_ok && create_abandonHTTPrelativePathBegin(result, config); bool was_sasObject_ok = was_abandonHTTPrelativePathBegin_ok && create_deviceSASObject(result, config); /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_011: [Otherwise, IoTHubTransportHttp_Create shall set a flag called "DoWork_PullNotification" to false, succeed and return a non-NULL value.]*/ if (was_sasObject_ok) { result->DoWork_PullNotification = false; result->doBatchedTransfers = false; result->isFirstPoll = true; result->getMinimumPollingTime = DEFAULT_GETMINIMUMPOLLINGTIME; result->waitingToSend = config->waitingToSend; DList_InitializeListHead(&(result->eventConfirmations)); } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_004: [If creating the string fail for any reason then IoTHubTransportHttp_Create shall fail and return NULL.] */ if (was_eventHTTPrelativePath_ok) destroy_eventHTTPrelativePath(result); /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_035: [If creating the notification HTTP relative path fails, then IoTHubTransportHttp_Create shall fail and return NULL.] */ if (was_notificationHTTPrelativePath_ok) destroy_notificationHTTPrelativePath(result); /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_006: [If creating the event HTTP request headers fails, then IoTHubTransportHttp_Create shall fail and return NULL.] */ if (was_eventHTTPrequestHeaders_ok) destroy_eventHTTPrequestHeaders(result); /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_008: [If creating the hostname fails then IoTHubTransportHttp_Create shall fail and return NULL.] */ if (was_hostName_ok) destroy_hostName(result); /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_010: [If creating the HTTPAPIEX_HANDLE fails then IoTHubTransportHttp_Create shall fail and return NULL.] */ if (was_httpApiExHandle_ok) destroy_httpApiExHandle(result); /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_060: [If creating notification HTTP request headers then IoTHubTransportHttp_Create shall fail and return NULL.]*/ if (was_notificationHTTPrequestHeaders_ok) destroy_notificationHTTPrequestHeaders(result); /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_062: [If creating the abandonHTTPrelativePathBegin fails then IoTHubTransportHttp_Create shall fail and return NULL] */ if (was_abandonHTTPrelativePathBegin_ok) destroy_abandonHTTPrelativePathBegin(result); free(result); result = NULL; } } } return result; } void IoTHubTransportHttp_Destroy(TRANSPORT_HANDLE handle) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_012: [IoTHubTransportHttp_Destroy shall do nothing if parameter handle is NULL.]*/ if (handle != NULL) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_013: [Otherwise IoTHubTransportHttp_Destroy shall free all the resources currently in use.] */ destroy_eventHTTPrelativePath(handle); destroy_notificationHTTPrelativePath(handle); destroy_eventHTTPrequestHeaders(handle); destroy_hostName(handle); destroy_httpApiExHandle(handle); destroy_notificationHTTPrequestHeaders(handle); destroy_abandonHTTPrelativePathBegin(handle); destroy_SASObject(handle); free(handle); } } int IoTHubTransportHttp_Subscribe(TRANSPORT_HANDLE handle) { int result; /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_014: [If parameter handle is NULL then IoTHubTransportHttp_Subscribe shall fail and return a non-zero value.] */ if (handle == NULL) { LogError("invalid arg passed to IoTHubTransportHttp_Subscribe\r\n"); result = __LINE__; } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_056: [Otherwise, IoTHubTransportHttp_Subscribe shall set the flag called DoWork_PullNotifications to true and succeed.] */ HTTPTRANSPORT_HANDLE_DATA* handleData = (HTTPTRANSPORT_HANDLE_DATA*)handle; handleData->DoWork_PullNotification = true; result = 0; } return result; } void IoTHubTransportHttp_Unsubscribe(TRANSPORT_HANDLE handle) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_016: [If parameter handle is NULL then IoTHubTransportHttp_Unsubscribe shall do nothing.] */ if (handle != NULL) { HTTPTRANSPORT_HANDLE_DATA* handleData = (HTTPTRANSPORT_HANDLE_DATA*)handle; /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_058: [Otherwise it shall set the flag DoWork_PullNotification to false.] */ handleData->DoWork_PullNotification = false; } } /*produces a representation of the properties, if they exist*/ /*if they do not exist, produces ""*/ static int concat_Properties(STRING_HANDLE existing, MAP_HANDLE map) { int result; const char*const* keys; const char*const* values; size_t count; if (Map_GetInternals(map, &keys, &values, &count) != MAP_OK) { result = __LINE__; LogError("error while Map_GetInternals\r\n"); } else { if (count == 0) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_076: [If IoTHubMessage does not have properties, then "properties":{...} shall be missing from the payload*/ /*no properties - do nothing with existing*/ result = 0; } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_075: [If IoTHubMessage has properties, then they shall be serialized at the same level as "body" using the following pattern: "properties":{"iothub-app-name1":"value1","iothub-app-name2":"value2*/ if (STRING_concat(existing, ",\"properties\":") != 0) { /*go ahead and return it*/ result = __LINE__; LogError("failed STRING_concat\r\n"); } else if (appendMapToJSON(existing, keys, values, count) != 0) { result = __LINE__; LogError("unable to append the properties\r\n"); } else { /*all is fine*/ result = 0; } } } return result; } /*produces a JSON representation of the map : {"a": "value_of_a","b":"value_of_b"}*/ static int appendMapToJSON(STRING_HANDLE existing, const char* const* keys, const char* const* values, size_t count) /*under consideration: move to MAP module when it has more than 1 user*/ { int result; if (STRING_concat(existing, "{") != 0) { /*go on and return it*/ result = __LINE__; LogError("STRING_construct failed\r\n"); } else { size_t i; for (i = 0; i < count; i++) { if (!( (STRING_concat(existing, (i == 0) ? "\"" IOTHUB_APP_PREFIX : ",\"" IOTHUB_APP_PREFIX) == 0) && (STRING_concat(existing, keys[i]) == 0) && (STRING_concat(existing, "\":\"") == 0) && (STRING_concat(existing, values[i]) == 0) && (STRING_concat(existing, "\"") == 0) )) { LogError("unable to STRING_concat\r\n"); break; } } if (i < count) { result = __LINE__; /*error, let it go through*/ } else if (STRING_concat(existing, "}") != 0) { result = __LINE__; LogError("unable to STRING_concat\r\n"); } else { /*all is fine*/ result = 0; } } return result; } /*makes the following string:{"body":"base64 encoding of the message content"[,"properties":{"a":"valueOfA"}]}*/ /*return NULL if there was a failure, or a non-NULL STRING_HANDLE that contains the intended data*/ static STRING_HANDLE make1EventJSONitem(PDLIST_ENTRY item) { STRING_HANDLE result; /*temp wants to contain :{"body":"base64 encoding of the message content"[,"properties":{"a":"valueOfA"}]}*/ IOTHUB_MESSAGE_LIST* message = containingRecord(item, IOTHUB_MESSAGE_LIST, entry); IOTHUBMESSAGE_CONTENT_TYPE contentType = IoTHubMessage_GetContentType(message->messageHandle); switch (contentType) { case IOTHUBMESSAGE_BYTEARRAY: { result = STRING_construct("{\"body\":\""); if (result == NULL) { LogError("unable to STRING_construct\r\n"); } else { const unsigned char* source; size_t size; if (IoTHubMessage_GetByteArray(message->messageHandle, &source, &size) != IOTHUB_MESSAGE_OK) { LogError("unable to get the data for the message.\r\n"); STRING_delete(result); result = NULL; } else { STRING_HANDLE encoded = Base64_Encode_Bytes(source, size); if (encoded == NULL) { LogError("unable to Base64_Encode_Bytes.\r\n"); STRING_delete(result); result = NULL; } else { if (!( (STRING_concat_with_STRING(result, encoded) == 0) && (STRING_concat(result, "\"") == 0) && /*\" because closing value*/ (concat_Properties(result, IoTHubMessage_Properties(message->messageHandle)) == 0) && (STRING_concat(result, "},") == 0) /*the last comma shall be replaced by a ']' by DaCr's suggestion (which is awesome enough to receive credits in the source code)*/ )) { STRING_delete(result); result = NULL; LogError("unable to STRING_concat_with_STRING.\r\n"); } else { /*all is fine... */ } STRING_delete(encoded); } } } break; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_113: [If a messages to be send has type IOTHUBMESSAGE_STRING, then its serialization shall be {"body":"JSON encoding of the string", "base64Encoded":false}] */ case IOTHUBMESSAGE_STRING: { result = STRING_construct("{\"body\":"); if (result == NULL) { LogError("unable to STRING_construct\r\n"); } else { const char* source = IoTHubMessage_GetString(message->messageHandle); if (source == NULL) { LogError("unable to IoTHubMessage_GetString\r\n"); STRING_delete(result); result = NULL; } else { STRING_HANDLE asJson = STRING_new_JSON(source); if (asJson == NULL) { LogError("unable to STRING_new_JSON\r\n"); STRING_delete(result); result = NULL; } else { if (!( (STRING_concat_with_STRING(result, asJson) == 0) && (STRING_concat(result, ",\"base64Encoded\":false") == 0) && (concat_Properties(result, IoTHubMessage_Properties(message->messageHandle)) == 0) && (STRING_concat(result, "},") == 0) /*the last comma shall be replaced by a ']' by DaCr's suggestion (which is awesome enough to receive credits in the source code)*/ )) { LogError("unable to STRING_concat_with_STRING"); STRING_delete(result); result = NULL; } else { /*result has the intended content*/ } STRING_delete(asJson); } } } break; } default: { LogError("an unknown message type was encountered (%d)\r\n", contentType); result = NULL; /*unknown message type*/ break; } } return result; } #define MAKE_PAYLOAD_RESULT_VALUES \ MAKE_PAYLOAD_OK, /*returned when there is a payload to be later send by HTTP*/ \ MAKE_PAYLOAD_NO_ITEMS, /*returned when there are no items to be send*/ \ MAKE_PAYLOAD_ERROR, /*returned when there were errors*/ \ MAKE_PAYLOAD_FIRST_ITEM_DOES_NOT_FIT /*returned when the first item doesn't fit*/ DEFINE_ENUM(MAKE_PAYLOAD_RESULT, MAKE_PAYLOAD_RESULT_VALUES); /*this function assembles several {"body":"base64 encoding of the message content"," base64Encoded": true} into 1 payload*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_070: [IoTHubTransportHttp_DoWork shall build the following string:[{"body":"base64 encoding of the message1 content"},{"body":"base64 encoding of the message2 content"}...]]*/ static MAKE_PAYLOAD_RESULT makePayload(HTTPTRANSPORT_HANDLE_DATA* handleData, STRING_HANDLE* payload) { MAKE_PAYLOAD_RESULT result; *payload = STRING_construct("["); if (*payload == NULL) { LogError("unable to STRING_construct\r\n"); result = MAKE_PAYLOAD_ERROR; } else { bool isFirst = true; PDLIST_ENTRY actual; /*either all the items enter the list or only some*/ result = MAKE_PAYLOAD_OK; /*optimistically initializing it*/ bool keepGoing = true; /*keepGoing gets sometimes to false from within the loop*/ while (keepGoing && ((actual = handleData->waitingToSend->Flink) != handleData->waitingToSend)) { STRING_HANDLE temp = make1EventJSONitem(actual); if (isFirst) { isFirst = false; /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_073: [If there is no valid payload, IoTHubTransportHttp_DoWork shall advance to the next activity.]*/ if (temp == NULL) /*first item failed to create, nothing to send*/ { result = MAKE_PAYLOAD_ERROR; STRING_delete(*payload); *payload = NULL; keepGoing = false; } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_071: [If the oldest message in waitingToSend causes the message to exceed 256K bytes then it shall be removed from waitingToSend, and IoTHubClient_LL_SendComplete shall be called. Parameter PDLIST_ENTRY completed shall point to a list containing only the oldest item, and parameter IOTHUB_BATCHSTATE result shall be set to IOTHUB_BATCHSTATE_FAILED.] */ if (STRING_length(temp) >= 256 * 1024) { PDLIST_ENTRY head = DList_RemoveHeadList(handleData->waitingToSend); /*actually this is the same as "actual", but now it is removed*/ DList_InsertTailList(&(handleData->eventConfirmations), head); result = MAKE_PAYLOAD_FIRST_ITEM_DOES_NOT_FIT; STRING_delete(*payload); *payload = NULL; keepGoing = false; } else { if (STRING_concat_with_STRING(*payload, temp) != 0) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_073: [If there is no valid payload, IoTHubTransportHttp_DoWork shall advance to the next activity.]*/ result = MAKE_PAYLOAD_ERROR; STRING_delete(*payload); *payload = NULL; keepGoing = false; } else { /*first item was put nicely in the payload*/ PDLIST_ENTRY head = DList_RemoveHeadList(handleData->waitingToSend); /*actually this is the same as "actual", but now it is removed*/ DList_InsertTailList(&(handleData->eventConfirmations), head); } } STRING_delete(temp); } } else { /*there is at least 1 item already in the payload*/ if (temp == NULL) { /*there are multiple payloads encoded, the last one had an internal error, just go with those - closing the payload happens "after the loop"*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_072: [If at any point during construction of the string there are errors, IoTHubTransportHttp_DoWork shall use the so far constructed string as payload.]*/ result = MAKE_PAYLOAD_OK; keepGoing = false; } else { if (STRING_length(*payload) + STRING_length(temp) > 256 * 1024) { /*this item doesn't make it to the payload, but the payload is valid so far*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_072: [If at any point during construction of the string there are errors, IoTHubTransportHttp_DoWork shall use the so far constructed string as payload.]*/ result = MAKE_PAYLOAD_OK; keepGoing = false; } else if (STRING_concat_with_STRING(*payload, temp) != 0) { /*should still send what there is so far...*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_072: [If at any point during construction of the string there are errors, IoTHubTransportHttp_DoWork shall use the so far constructed string as payload.]*/ result = MAKE_PAYLOAD_OK; keepGoing = false; } else { /*cool, the payload made it there, let's continue... */ PDLIST_ENTRY head = DList_RemoveHeadList(handleData->waitingToSend); /*actually this is the same as "actual", but now it is removed*/ DList_InsertTailList(&(handleData->eventConfirmations), head); } STRING_delete(temp); } } } /*closing the payload*/ if (result == MAKE_PAYLOAD_OK) { ((char*)STRING_c_str(*payload))[STRING_length(*payload) - 1] = ']'; /*TODO - do this in STRING_HANDLE*/ } else { /*no need to close anything*/ } } return result; } static void reversePutListBackIn(PDLIST_ENTRY source, PDLIST_ENTRY destination) { /*this function takes a list, and inserts it in another list. When done in the context of this file, it reverses the effects of a not-able-to-send situation*/ PDLIST_ENTRY afterHead; while ((afterHead = DList_RemoveHeadList(source)) != source) { DList_InsertHeadList(destination, afterHead); } } static void DoEvent(TRANSPORT_HANDLE handle, IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle) { HTTPTRANSPORT_HANDLE_DATA* handleData = (HTTPTRANSPORT_HANDLE_DATA*)handle; if (DList_IsListEmpty(handleData->waitingToSend)) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_019: [If the list is empty then IoTHubTransportHttp_DoWork shall proceed to the following action.] */ } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_101: [If option SetBatching is true then _Dowork shall send batched event message as specced below.] */ if (handleData->doBatchedTransfers) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_102: [Request HTTP headers shall have the value of "Content-Type" created or updated to "application/vnd.microsoft.iothub.json" by a call to HTTPHeaders_ReplaceHeaderNameValuePair.] */ if (HTTPHeaders_ReplaceHeaderNameValuePair(handleData->eventHTTPrequestHeaders, CONTENT_TYPE, APPLICATION_VND_MICROSOFT_IOTHUB_JSON) != HTTP_HEADERS_OK) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_103: [If updating Content-Type fails for any reason, then _DoWork shall advance to the next action.] */ LogError("unable to HTTPHeaders_ReplaceHeaderNameValuePair\r\n"); } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_018: [It shall inspect the "waitingToSend" DLIST passed in config structure.] */ STRING_HANDLE payload; switch (makePayload(handleData, &payload)) { case MAKE_PAYLOAD_OK: { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_031: [Once a final payload has been obtained, IoTHubTransportHttp_DoWork shall call HTTPAPIEX_SAS_ExecuteRequest passing the following parameters:] */ BUFFER_HANDLE temp = BUFFER_new(); if (temp == NULL) { LogError("unable to BUFFER_new\r\n"); /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_073: [If there is no valid payload, IoTHubTransportHttp_DoWork shall advance to the next activity.]*/ reversePutListBackIn(&(handleData->eventConfirmations), handleData->waitingToSend); } else { if (BUFFER_build(temp, (const unsigned char*)STRING_c_str(payload), STRING_length(payload)) != 0) { LogError("unable to BUFFER_build\r\n"); //items go back to waitingToSend /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_073: [If there is no valid payload, IoTHubTransportHttp_DoWork shall advance to the next activity.]*/ reversePutListBackIn(&(handleData->eventConfirmations), handleData->waitingToSend); } else { unsigned int statusCode; HTTPAPIEX_RESULT r; if ((r = HTTPAPIEX_SAS_ExecuteRequest( handleData->sasObject, handleData->httpApiExHandle, HTTPAPI_REQUEST_POST, STRING_c_str(handleData->eventHTTPrelativePath), handleData->eventHTTPrequestHeaders, temp, &statusCode, NULL, NULL )) != HTTPAPIEX_OK) { LogError("unable to HTTPAPIEX_ExecuteRequest\r\n"); //items go back to waitingToSend /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_065: [if HTTPAPIEX_SAS_ExecuteRequest fails or the http status code >=300 then IoTHubTransportHttp_DoWork shall not do any other action (it is assumed at the next _DoWork it shall be retried).] */ reversePutListBackIn(&(handleData->eventConfirmations), handleData->waitingToSend); } else { if (statusCode < 300) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_067: [If HTTPAPIEX_SAS_ExecuteRequest does not fail and http status code <300 then IoTHubTransportHttp_DoWork shall call IoTHubClient_LL_SendComplete. Parameter PDLIST_ENTRY completed shall point to a list containing all the items batched, and parameter IOTHUB_BATCHSTATE result shall be set to IOTHUB_BATCHSTATE_SUCESS. The batched items shall be removed from waitingToSend.] */ IoTHubClient_LL_SendComplete(iotHubClientHandle, &(handleData->eventConfirmations), IOTHUB_BATCHSTATE_SUCCESS); } else { //items go back to waitingToSend /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_065: [if HTTPAPIEX_SAS_ExecuteRequest fails or the http status code >=300 then IoTHubTransportHttp_DoWork shall not do any other action (it is assumed at the next _DoWork it shall be retried).] */ LogError("unexpected HTTP status code (%u)\r\n", statusCode); reversePutListBackIn(&(handleData->eventConfirmations), handleData->waitingToSend); } } } BUFFER_delete(temp); } STRING_delete(payload); break; } case MAKE_PAYLOAD_FIRST_ITEM_DOES_NOT_FIT: { IoTHubClient_LL_SendComplete(iotHubClientHandle, &(handleData->eventConfirmations), IOTHUB_BATCHSTATE_FAILED); /*takes care of emptying the list too*/ break; } case MAKE_PAYLOAD_ERROR: { LogError("unrecoverable errors while building a batch message\r\n"); break; } case MAKE_PAYLOAD_NO_ITEMS: { /*do nothing*/ break; } default: { LogError("internal error: switch's default branch reached when never intended\r\n"); break; } } } } else { const unsigned char* messageContent; size_t messageSize; IOTHUB_MESSAGE_LIST* message = containingRecord(handleData->waitingToSend->Flink, IOTHUB_MESSAGE_LIST, entry); IOTHUBMESSAGE_CONTENT_TYPE contentType = IoTHubMessage_GetContentType(message->messageHandle); if (!( ((contentType == IOTHUBMESSAGE_BYTEARRAY) && (IoTHubMessage_GetByteArray(message->messageHandle, &messageContent, &messageSize)==IOTHUB_MESSAGE_OK)) || ((contentType == IOTHUBMESSAGE_STRING) && ( messageContent = (const unsigned char*)IoTHubMessage_GetString(message->messageHandle), (messageSize = (messageContent == NULL)?0:strlen((const char*)messageContent)), messageContent!=NULL) ) )) { LogError("unable to get the message content\r\n"); /*go on...*/ } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_109: [If the oldest message in waitingToSend causes the message to exceed 256K bytes then it shall be removed from waitingToSend, and IoTHubClient_LL_SendComplete shall be called. Parameter PDLIST_ENTRY completed shall point to a list containing only the oldest item, and parameter IOTHUB_BATCHSTATE result shall be set to IOTHUB_BATCHSTATE_FAILED.] */ if (messageSize >= 256 * 1024) { PDLIST_ENTRY head = DList_RemoveHeadList(handleData->waitingToSend); /*actually this is the same as "actual", but now it is removed*/ DList_InsertTailList(&(handleData->eventConfirmations), head); IoTHubClient_LL_SendComplete(iotHubClientHandle, &(handleData->eventConfirmations), IOTHUB_BATCHSTATE_FAILED); /*takes care of emptying the list too*/ } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_104: [If option SetBatching is false then _Dowork shall send individual event message as specced below.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_105: [A clone of the event HTTP request headers shall be created.]*/ HTTP_HEADERS_HANDLE clonedEventHTTPrequestHeaders = HTTPHeaders_Clone(handleData->eventHTTPrequestHeaders); if (clonedEventHTTPrequestHeaders == NULL) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_108: [If any HTTP header operation fails, _DoWork shall advance to the next action.] */ LogError("HTTPHeaders_Clone failed\r\n"); } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_106: [The cloned HTTP headers shall have the HTTP header "Content-Type" set to "application/octet-stream".] */ if (HTTPHeaders_ReplaceHeaderNameValuePair(clonedEventHTTPrequestHeaders, CONTENT_TYPE, APPLICATION_OCTET_STREAM) != HTTP_HEADERS_OK) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_108: [If any HTTP header operation fails, _DoWork shall advance to the next action.] */ LogError("HTTPHeaders_ReplaceHeaderNameValuePair failed\r\n"); } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_107: [Every message property "property":"value" shall be added to the HTTP headers as an individual header "iothub-app-property":"value".] */ MAP_HANDLE map = IoTHubMessage_Properties(message->messageHandle); const char*const* keys; const char*const* values; size_t count; if (Map_GetInternals(map, &keys, &values, &count) != MAP_OK) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_108: [If any HTTP header operation fails, _DoWork shall advance to the next action.] */ LogError("unable to Map_GetInternals\r\n"); } else { size_t i; bool goOn = true; for (i = 0; (i < count) && goOn; i++) { STRING_HANDLE temp = STRING_construct(IOTHUB_APP_PREFIX); if (temp == NULL) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_108: [If any HTTP header operation fails, _DoWork shall advance to the next action.] */ LogError("unable to STRING_construct\r\n"); goOn = false; } else { if (STRING_concat(temp, keys[i]) != 0) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_108: [If any HTTP header operation fails, _DoWork shall advance to the next action.] */ LogError("unable to STRING_concat\r\n"); goOn = false; } else { if (HTTPHeaders_ReplaceHeaderNameValuePair(clonedEventHTTPrequestHeaders, STRING_c_str(temp), values[i]) != HTTP_HEADERS_OK) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_108: [If any HTTP header operation fails, _DoWork shall advance to the next action.] */ LogError("unable to HTTPHeaders_ReplaceHeaderNameValuePair\r\n"); goOn = false; } } STRING_delete(temp); } } if (!goOn) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_108: [If any HTTP header operation fails, _DoWork shall advance to the next action.] */ } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_110: [IoTHubTransportHttp_DoWork shall call HTTPAPIEX_SAS_ExecuteRequest passing the following parameters] */ BUFFER_HANDLE toBeSend = BUFFER_new(); if (toBeSend == NULL) { LogError("unable to BUFFER_new\r\n"); } else { if (BUFFER_build(toBeSend, messageContent, messageSize) != 0) { LogError("unable to BUFFER_build\r\n"); } else { unsigned int statusCode; HTTPAPIEX_RESULT r; if ((r = HTTPAPIEX_SAS_ExecuteRequest( handleData->sasObject, handleData->httpApiExHandle, HTTPAPI_REQUEST_POST, STRING_c_str(handleData->eventHTTPrelativePath), clonedEventHTTPrequestHeaders, toBeSend, &statusCode, NULL, NULL )) != HTTPAPIEX_OK) { LogError("unable to HTTPAPIEX_ExecuteRequest\r\n"); } else { if (statusCode < 300) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_112: [If HTTPAPIEX_SAS_ExecuteRequest does not fail and http status code <300 then IoTHubTransportHttp_DoWork shall call IoTHubClient_LL_SendComplete. Parameter PDLIST_ENTRY completed shall point to a list the item send, and parameter IOTHUB_BATCHSTATE result shall be set to IOTHUB_BATCHSTATE_SUCCESS. The item shall be removed from waitingToSend.] */ PDLIST_ENTRY justSent = DList_RemoveHeadList(handleData->waitingToSend); /*actually this is the same as "actual", but now it is removed*/ DList_InsertTailList(&(handleData->eventConfirmations), justSent); IoTHubClient_LL_SendComplete(iotHubClientHandle, &(handleData->eventConfirmations), IOTHUB_BATCHSTATE_SUCCESS); /*takes care of emptying the list too*/ } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_111: [If HTTPAPIEX_SAS_ExecuteRequest fails or the http status code >=300 then IoTHubTransportHttp_DoWork shall not do any other action (it is assumed at the next _DoWork it shall be retried).] */ LogError("unexpected HTTP status code (%u)\r\n", statusCode); } } } BUFFER_delete(toBeSend); } } } } HTTPHeaders_Free(clonedEventHTTPrequestHeaders); } } } } } } #define ACTION_VALUES \ ABANDON, \ REJECT, \ ACCEPT DEFINE_ENUM(ACTION, ACTION_VALUES); static void abandonOrAcceptMessage(HTTPTRANSPORT_HANDLE_DATA* handleData, const char* ETag, ACTION action) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_050: [_DoWork shall call HTTPAPIEX_SAS_ExecuteRequest with the following parameters: -requestType: POST -relativePath: abandon relative path begin (as created by _Create) + value of ETag + "/abandon?api-version=2015-08-15-preview" - requestHttpHeadersHandle: an HTTP headers instance containing the following Authorization: " " If-Match: value of ETag - requestContent: NULL - statusCode: a pointer to unsigned int which might be examined for logging - responseHeadearsHandle: NULL - responseContent: NULL]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_051: [_DoWork shall call HTTPAPIEX_SAS_ExecuteRequest with the following parameters: -requestType: DELETE -relativePath: abandon relative path begin + value of ETag + "?api-version=2015-08-15-preview" - requestHttpHeadersHandle: an HTTP headers instance containing the following Authorization: " " If-Match: value of ETag - requestContent: NULL - statusCode: a pointer to unsigned int which might be used by logging - responseHeadearsHandle: NULL - responseContent: NULL]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_077: [_DoWork shall call HTTPAPIEX_SAS_ExecuteRequest with the following parameters: -requestType: DELETE -relativePath: abandon relative path begin + value of ETag +"?api-version=2015-08-15-preview" + "&reject" - requestHttpHeadersHandle: an HTTP headers instance containing the following Authorization: " " If-Match: value of ETag - requestContent: NULL - statusCode: a pointer to unsigned int which might be used by logging - responseHeadearsHandle: NULL - responseContent: NULL]*/ STRING_HANDLE fullAbandonRelativePath = STRING_clone(handleData->abandonHTTPrelativePathBegin); if (fullAbandonRelativePath == NULL) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_052: [Abandoning the message is considered successful if the HTTPAPIEX_SAS_ExecuteRequest doesn't fail and the statusCode is 204.]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_054: [Accepting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_078: [Rejecting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ LogError("unable to STRING_clone\r\n"); } else { STRING_HANDLE ETagUnquoted = STRING_construct_n(ETag + 1, strlen(ETag) - 2); /*skip first character which is '"' and the last one (which is also '"')*/ if (ETagUnquoted == NULL) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_052: [Abandoning the message is considered successful if the HTTPAPIEX_SAS_ExecuteRequest doesn't fail and the statusCode is 204.]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_054: [Accepting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_078: [Rejecting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ LogError("unable to STRING_construct_n\r\n"); } else { if (!( (STRING_concat_with_STRING(fullAbandonRelativePath, ETagUnquoted) == 0) && (STRING_concat(fullAbandonRelativePath, (action == ABANDON) ? "/abandon" API_VERSION : ((action == REJECT) ? API_VERSION "&reject" : API_VERSION)) == 0) )) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_052: [Abandoning the message is considered successful if the HTTPAPIEX_SAS_ExecuteRequest doesn't fail and the statusCode is 204.]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_054: [Accepting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_078: [Rejecting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ LogError("unable to STRING_concat\r\n"); } else { HTTP_HEADERS_HANDLE abandonRequestHttpHeaders = HTTPHeaders_Alloc(); if (abandonRequestHttpHeaders == NULL) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_052: [Abandoning the message is considered successful if the HTTPAPIEX_SAS_ExecuteRequest doesn't fail and the statusCode is 204.]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_054: [Accepting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_078: [Rejecting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ LogError("unable to HTTPHeaders_Alloc\r\n"); } else { if (!( (HTTPHeaders_AddHeaderNameValuePair(abandonRequestHttpHeaders, "Authorization", " ") == HTTP_HEADERS_OK) && (HTTPHeaders_AddHeaderNameValuePair(abandonRequestHttpHeaders, "If-Match", ETag) == HTTP_HEADERS_OK) )) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_052: [Abandoning the message is considered successful if the HTTPAPIEX_SAS_ExecuteRequest doesn't fail and the statusCode is 204.]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_054: [Accepting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_078: [Rejecting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ LogError("unable to HTTPHeaders_AddHeaderNameValuePair\r\n"); } else { unsigned int statusCode; if (HTTPAPIEX_SAS_ExecuteRequest( handleData->sasObject, handleData->httpApiExHandle, (action == ABANDON) ? HTTPAPI_REQUEST_POST : HTTPAPI_REQUEST_DELETE, /*-requestType: POST */ STRING_c_str(fullAbandonRelativePath), /*-relativePath: abandon relative path begin (as created by _Create) + value of ETag + "/abandon?api-version=2015-08-15-preview" */ abandonRequestHttpHeaders, /*- requestHttpHeadersHandle: an HTTP headers instance containing the following */ NULL, /*- requestContent: NULL */ &statusCode, /*- statusCode: a pointer to unsigned int which might be examined for logging */ NULL, /*- responseHeadearsHandle: NULL */ NULL /*- responseContent: NULL] */ ) != HTTPAPIEX_OK) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_052: [Abandoning the message is considered successful if the HTTPAPIEX_SAS_ExecuteRequest doesn't fail and the statusCode is 204.]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_054: [Accepting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_078: [Rejecting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ LogError("unable to HTTPAPIEX_ExecuteRequest\r\n"); } else { if (statusCode != 204) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_052: [Abandoning the message is considered successful if the HTTPAPIEX_SAS_ExecuteRequest doesn't fail and the statusCode is 204.]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_054: [Accepting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_078: [Rejecting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ LogError("unexpected status code returned %u (was expecting 204)\r\n", statusCode); } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_052: [Abandoning the message is considered successful if the HTTPAPIEX_SAS_ExecuteRequest doesn't fail and the statusCode is 204.]*/ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_054: [Accepting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_078: [Rejecting a message is successful when HTTPAPIEX_SAS_ExecuteRequest completes successfully and the status code is 204.] */ /*all is fine*/ } } } HTTPHeaders_Free(abandonRequestHttpHeaders); } } STRING_delete(ETagUnquoted); } STRING_delete(fullAbandonRelativePath); } } static void DoNotifications(TRANSPORT_HANDLE handle, IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle) { HTTPTRANSPORT_HANDLE_DATA* handleData = (HTTPTRANSPORT_HANDLE_DATA*)handle; /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_057: [If flag DoWork_PullNotification is set to false then _DoWork shall advance to the next action.] */ if (handleData->DoWork_PullNotification) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_116: [After client creation, the first GET shall be allowed no matter what the value of GetMinimumPollingTime.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_117: [If time is not available then all calls shall be treated as if they are the first one.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_115: [A GET request that happens earlier than GetMinimumPollingTime shall be ignored.] */ time_t timeNow = get_time(NULL); bool isPollingAllowed = handleData->isFirstPoll || (timeNow == (time_t)(-1)) || (get_difftime(timeNow, handleData->lastPollTime) > handleData->getMinimumPollingTime); if (isPollingAllowed) { HTTP_HEADERS_HANDLE responseHTTPHeaders = HTTPHeaders_Alloc(); if (responseHTTPHeaders == NULL) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_037: [If the call to HTTPAPIEX_SAS_ExecuteRequest did not executed successfully or building any part of the prerequisites of the call fails, then _DoWork shall advance to the next action in this description.] */ LogError("unable to HTTPHeaders_Alloc\r\n"); } else { BUFFER_HANDLE responseContent = BUFFER_new(); if (responseContent == NULL) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_037: [If the call to HTTPAPIEX_SAS_ExecuteRequest did not executed successfully or building any part of the prerequisites of the call fails, then _DoWork shall advance to the next action in this description.] */ LogError("unable to BUFFER_new\r\n"); } else { unsigned int statusCode; /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_036: [Otherwise, IoTHubTransportHttp_DoWork shall call HTTPAPIEX_SAS_ExecuteRequest passing the following parameters requestType: GET relativePath: the notification HTTP relative path requestHttpHeadersHandle: notification HTTP request headers created by _Create requestContent: NULL statusCode: a pointer to unsigned int which shall be later examined responseHeadearsHandle: a new instance of HTTP headers responseContent: a new instance of buffer] */ if (HTTPAPIEX_SAS_ExecuteRequest( handleData->sasObject, handleData->httpApiExHandle, HTTPAPI_REQUEST_GET, /*requestType: GET*/ STRING_c_str(handleData->notificationHTTPrelativePath), /*relativePath: the notification HTTP relative path*/ handleData->notificationHTTPrequestHeaders, /*requestHttpHeadersHandle: notification HTTP request headers created by _Create*/ NULL, /*requestContent: NULL*/ &statusCode, /*statusCode: a pointer to unsigned int which shall be later examined*/ responseHTTPHeaders, /*responseHeadearsHandle: a new instance of HTTP headers*/ responseContent /*responseContent: a new instance of buffer*/ ) != HTTPAPIEX_OK) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_037: [If the call to HTTPAPIEX_SAS_ExecuteRequest did not executed successfully or building any part of the prerequisites of the call fails, then _DoWork shall advance to the next action in this description.] */ LogError("unable to HTTPAPIEX_ExecuteRequest\r\n"); } else { /*HTTP dialogue was succesfull*/ if (timeNow == (time_t)(-1)) { handleData->isFirstPoll = true; } else { handleData->isFirstPoll = false; handleData->lastPollTime = timeNow; } if (statusCode == 204) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_038: [If the HTTPAPIEX_SAS_ExecuteRequest executed successfully then status code shall be examined. Any status code different than 200 causes _DoWork to advance to the next action.] */ /*this is an expected status code, means "no commands", but logging that creates panic*/ /*do nothing, advance to next action*/ } else if (statusCode != 200) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_038: [If the HTTPAPIEX_SAS_ExecuteRequest executed successfully then status code shall be examined. Any status code different than 200 causes _DoWork to advance to the next action.] */ LogError("expected status code was 200, but actually was received %u... moving on\r\n", statusCode); } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_039: [If status code is 200, then _DoWork shall make a copy of the value of the "ETag" http header.]*/ const char* etagValue = HTTPHeaders_FindHeaderValue(responseHTTPHeaders, "ETag"); if (etagValue == NULL) { LogError("unable to find a received header called \"E-Tag\"\r\n"); } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_040: [If no such header is found or is invalid, then _DoWork shall advance to the next action.]*/ size_t etagsize = strlen(etagValue); if ( (etagsize < 2) || (etagValue[0] != '"') || (etagValue[etagsize - 1] != '"') ) { LogError("ETag is not a valid quoted string\r\n"); } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_041: [_DoWork shall assemble an IOTHUBMESSAGE_HANDLE from the received HTTP content (using the responseContent buffer).] */ IOTHUB_MESSAGE_HANDLE receivedMessage = IoTHubMessage_CreateFromByteArray(BUFFER_u_char(responseContent), BUFFER_length(responseContent)); if (receivedMessage == NULL) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_042: [If assembling the message fails in any way, then _DoWork shall "abandon" the message.]*/ LogError("unable to IoTHubMessage_CreateFromByteArray, trying to abandon the message... \r\n"); abandonOrAcceptMessage(handle, etagValue, ABANDON); } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_087: [All the HTTP headers of the form iothub-app-name:somecontent shall be transformed in message properties {name, somecontent}.]*/ size_t nHeaders; if (HTTPHeaders_GetHeaderCount(responseHTTPHeaders, &nHeaders) != HTTP_HEADERS_OK) { LogError("unable to get the count of HTTP headers\r\n"); abandonOrAcceptMessage(handle, etagValue, ABANDON); } else { size_t i; MAP_HANDLE properties = (nHeaders > 0) ? IoTHubMessage_Properties(receivedMessage) : NULL; for (i = 0; i < nHeaders; i++) { char* completeHeader; if (HTTPHeaders_GetHeader(responseHTTPHeaders, i, &completeHeader) != HTTP_HEADERS_OK) { break; } else { if (strncmp(IOTHUB_APP_PREFIX, completeHeader, strlen(IOTHUB_APP_PREFIX)) == 0) { /*looks like a property headers*/ /*there's a guaranteed ':' in the completeHeader, by HTTP_HEADERS module*/ char* whereIsColon = strchr(completeHeader, ':'); *whereIsColon = '\0'; /*cut it down*/ if (Map_AddOrUpdate(properties, completeHeader + strlen(IOTHUB_APP_PREFIX), whereIsColon + 2) != MAP_OK) /*whereIsColon+1 is a space because HTTPEHADERS outputs a ": " between name and value*/ { free(completeHeader); break; } } free(completeHeader); } } if (i < nHeaders) { abandonOrAcceptMessage(handle, etagValue, ABANDON); } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_043: [Otherwise, _DoWork shall call IoTHubClient_LL_NotificationCallback with parameters handle = iotHubClientHandle and notificationMessage = newly created message.]*/ IOTHUBMESSAGE_DISPOSITION_RESULT notificationResult = IoTHubClient_LL_NotificationCallback(iotHubClientHandle, receivedMessage); if (notificationResult == IOTHUBMESSAGE_ACCEPTED) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_044: [If IoTHubClient_LL_NotificationCallback returns IOTHUBMESSAGE_ACCEPTED then _DoWork shall "accept" the message.]*/ abandonOrAcceptMessage(handle, etagValue, ACCEPT); } else if (notificationResult == IOTHUBMESSAGE_REJECTED) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_074: [If IoTHubClient_LL_NotificationCallback returns IOTHUBMESSAGE_REJECTED then _DoWork shall "reject" the message.]*/ abandonOrAcceptMessage(handle, etagValue, REJECT); } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_079: [If IoTHubClient_LL_NotificationCallback returns IOTHUBMESSAGE_ABANDONED then _DoWork shall "abandon" the message.] */ abandonOrAcceptMessage(handle, etagValue, ABANDON); } } } IoTHubMessage_Destroy(receivedMessage); } } } } } BUFFER_delete(responseContent); } HTTPHeaders_Free(responseHTTPHeaders); } } else { /*isPollingAllowed is false... */ /*do nothing "shall be ignored*/ } } } void IoTHubTransportHttp_DoWork(TRANSPORT_HANDLE handle, IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_017: [If parameter handle is NULL or parameter iotHubClientHandle then IoTHubTransportHttp_DoWork shall immeditely return.]*/ if ((handle != NULL) && (iotHubClientHandle != NULL)) { DoEvent(handle, iotHubClientHandle); DoNotifications(handle, iotHubClientHandle); } } IOTHUB_CLIENT_RESULT IoTHubTransportHttp_GetSendStatus(TRANSPORT_HANDLE handle, IOTHUB_CLIENT_STATUS *iotHubClientStatus) { IOTHUB_CLIENT_RESULT result; /* Codes_SRS_IOTHUBTRANSPORTTHTTP_09_001: [IoTHubTransportHttp_GetSendStatus shall return IOTHUB_CLIENT_INVALID_ARG if called with NULL parameter] */ if (handle == NULL) { result = IOTHUB_CLIENT_INVALID_ARG; LogError("Invalid handle to IoTHubClient HTTP transport instance.\r\n"); } else if (iotHubClientStatus == NULL) { result = IOTHUB_CLIENT_INVALID_ARG; LogError("Invalid pointer to output parameter IOTHUB_CLIENT_STATUS.\r\n"); } else { HTTPTRANSPORT_HANDLE_DATA* handleData = (HTTPTRANSPORT_HANDLE_DATA*)handle; /* Codes_SRS_IOTHUBTRANSPORTTHTTP_09_002: [IoTHubTransportHttp_GetSendStatus shall return IOTHUB_CLIENT_OK and status IOTHUB_CLIENT_SEND_STATUS_IDLE if there are currently no event items to be sent or being sent] */ if (!DList_IsListEmpty(handleData->waitingToSend)) { *iotHubClientStatus = IOTHUB_CLIENT_SEND_STATUS_BUSY; } /* Codes_SRS_IOTHUBTRANSPORTTHTTP_09_003: [IoTHubTransportHttp_GetSendStatus shall return IOTHUB_CLIENT_OK and status IOTHUB_CLIENT_SEND_STATUS_BUSY if there are currently event items to be sent or being sent] */ else { *iotHubClientStatus = IOTHUB_CLIENT_SEND_STATUS_IDLE; } result = IOTHUB_CLIENT_OK; } return result; } IOTHUB_CLIENT_RESULT IoTHubTransportHttp_SetOption(TRANSPORT_HANDLE handle, const char* option, const void* value) { IOTHUB_CLIENT_RESULT result; /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_080: [If handle parameter is NULL then IoTHubTransportHttp_SetOption shall return IOTHUB_CLIENT_INVALID_ARG.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_081: [If option parameter is NULL then IoTHubTransportHttp_SetOption shall return IOTHUB_CLIENT_INVALID_ARG.] */ /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_082: [If value parameter is NULL then IoTHubTransportHttp_SetOption shall return IOTHUB_CLIENT_INVALID_ARG.] */ if ( (handle == NULL) || (option == NULL) || (value == NULL) ) { result = IOTHUB_CLIENT_INVALID_ARG; LogError("invalid parameter (NULL) passed to IoTHubTransportHttp_SetOption\r\n"); } else { HTTPTRANSPORT_HANDLE_DATA* handleData = (HTTPTRANSPORT_HANDLE_DATA*)handle; /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_097: ["SetBatching"] */ if (strcmp("SetBatching", option) == 0) { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_083: [If optionName is an option handled by IoTHubTransportHttp then it shall be set.] */ handleData->doBatchedTransfers = *(bool*)value; result = IOTHUB_CLIENT_OK; } /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_114: ["GetMinimumPollingTime"] */ else if (strcmp("GetMinimumPollingTime", option) == 0) { handleData->getMinimumPollingTime = *(unsigned int*)value; result = IOTHUB_CLIENT_OK; } else { /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_084: [Otherwise, IoTHubTransport_Http shall call HTTPAPIEX_SetOption with the same parameters and return the translated code.] */ HTTPAPIEX_RESULT HTTPAPIEX_result = HTTPAPIEX_SetOption(handleData->httpApiExHandle, option, value); /*Codes_SRS_IOTHUBTRANSPORTTHTTP_02_086: [The following table translates HTTPAPIEX return codes to IOTHUB_CLIENT_RESULT return codes:] */ if (HTTPAPIEX_result == HTTPAPIEX_OK) { result = IOTHUB_CLIENT_OK; } else if (HTTPAPIEX_result == HTTPAPIEX_INVALID_ARG) { result = IOTHUB_CLIENT_INVALID_ARG; LogError("HTTPAPIEX_SetOption failed\r\n"); } else { result = IOTHUB_CLIENT_ERROR; LogError("HTTPAPIEX_SetOption failed\r\n"); } } } return result; }