Azure IoT
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
Diff: iothubtransporthttp.c
- Revision:
- 0:fa2b00dcd9d4
- Child:
- 1:2ba812f3d9b7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/iothubtransporthttp.c Tue Sep 15 21:57:19 2015 -0700
@@ -0,0 +1,1604 @@
+// 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;
+}
