static IOTHUB_REGISTRYMANAGER_RESULT sendHttpRequestCRUD()

in iothub_service_client/src/iothub_registrymanager.c [1149:1264]
111 lines of code
22 McCabe index (conditional complexity)

static IOTHUB_REGISTRYMANAGER_RESULT sendHttpRequestCRUD(IOTHUB_REGISTRYMANAGER_HANDLE registryManagerHandle, IOTHUB_REQUEST_MODE iotHubRequestMode, const char* deviceName, const char* moduleId, BUFFER_HANDLE deviceJsonBuffer, size_t numberOfDevices, BUFFER_HANDLE responseBuffer)
{
    IOTHUB_REGISTRYMANAGER_RESULT result;

    STRING_HANDLE uriResource = NULL;
    STRING_HANDLE accessKey = NULL;
    STRING_HANDLE keyName = NULL;
    HTTPAPIEX_SAS_HANDLE httpExApiSasHandle = NULL;
    HTTPAPIEX_HANDLE httpExApiHandle = NULL;
    HTTP_HEADERS_HANDLE httpHeader = NULL;

    if ((uriResource = createUriPath(registryManagerHandle)) == NULL)
    {
        LogError("STRING_construct failed for uriResource");
        result = IOTHUB_REGISTRYMANAGER_ERROR;
    }
    else if ((accessKey = STRING_construct(registryManagerHandle->sharedAccessKey)) == NULL)
    {
        LogError("STRING_construct failed for accessKey");
        result = IOTHUB_REGISTRYMANAGER_ERROR;
    }
    else if ((registryManagerHandle->keyName != NULL) && ((keyName = STRING_construct(registryManagerHandle->keyName)) == NULL))
    {
        LogError("STRING_construct failed for keyName");
        result = IOTHUB_REGISTRYMANAGER_ERROR;
    }
    else if ((httpHeader = createHttpHeader(iotHubRequestMode)) == NULL)
    {
        LogError("HttpHeader creation failed");
        result = IOTHUB_REGISTRYMANAGER_HTTPAPI_ERROR;
    }
    else if ((httpExApiSasHandle = HTTPAPIEX_SAS_Create(accessKey, uriResource, keyName)) == NULL)
    {
        LogError("HTTPAPIEX_SAS_Create failed");
        result = IOTHUB_REGISTRYMANAGER_HTTPAPI_ERROR;
    }
    else if ((httpExApiHandle = HTTPAPIEX_Create(registryManagerHandle->hostname)) == NULL)
    {
        LogError("HTTPAPIEX_Create failed");
        result = IOTHUB_REGISTRYMANAGER_HTTPAPI_ERROR;
    }
    else
    {
        HTTPAPI_REQUEST_TYPE httpApiRequestType = HTTPAPI_REQUEST_GET;
        char relativePath[256];
        unsigned int statusCode;
        unsigned char is_error = 0;

        if ((iotHubRequestMode == IOTHUB_REQUEST_CREATE) || (iotHubRequestMode == IOTHUB_REQUEST_UPDATE))
        {
            httpApiRequestType = HTTPAPI_REQUEST_PUT;
        }
        else if (iotHubRequestMode == IOTHUB_REQUEST_DELETE)
        {
            httpApiRequestType = HTTPAPI_REQUEST_DELETE;
        }
        else if ((iotHubRequestMode == IOTHUB_REQUEST_GET) || (iotHubRequestMode == IOTHUB_REQUEST_GET_DEVICE_LIST) || (iotHubRequestMode == IOTHUB_REQUEST_GET_STATISTICS))
        {
            httpApiRequestType = HTTPAPI_REQUEST_GET;
        }
        else
        {
            is_error = 1;
        }

        if (is_error)
        {
            LogError("Invalid request type");
            result = IOTHUB_REGISTRYMANAGER_HTTPAPI_ERROR;
        }
        else
        {
            if (createRelativePath(iotHubRequestMode, deviceName, moduleId, numberOfDevices, relativePath) != IOTHUB_REGISTRYMANAGER_OK)
            {
                LogError("Failure creating relative path");
                result = IOTHUB_REGISTRYMANAGER_ERROR;
            }
            else if (HTTPAPIEX_SAS_ExecuteRequest(httpExApiSasHandle, httpExApiHandle, httpApiRequestType, relativePath, httpHeader, deviceJsonBuffer, &statusCode, NULL, responseBuffer) != HTTPAPIEX_OK)
            {
                LogError("HTTPAPIEX_SAS_ExecuteRequest failed. Host:%s", registryManagerHandle->hostname);
                result = IOTHUB_REGISTRYMANAGER_HTTPAPI_ERROR;
            }
            else
            {
                if (statusCode > 300)
                {
                    if ((iotHubRequestMode == IOTHUB_REQUEST_CREATE) && (statusCode == 409))
                    {
                        result = IOTHUB_REGISTRYMANAGER_DEVICE_EXIST;
                    }
                    else if ((iotHubRequestMode == IOTHUB_REQUEST_GET) && (statusCode == 404))
                    {
                        result = IOTHUB_REGISTRYMANAGER_DEVICE_NOT_EXIST;
                    }
                    else
                    {
                        LogError("Http Failure status code %d.", statusCode);
                        result = IOTHUB_REGISTRYMANAGER_HTTP_STATUS_ERROR;
                    }
                }
                else
                {
                    result = IOTHUB_REGISTRYMANAGER_OK;
                }
            }
        }
    }

    HTTPHeaders_Free(httpHeader);
    HTTPAPIEX_Destroy(httpExApiHandle);
    HTTPAPIEX_SAS_Destroy(httpExApiSasHandle);
    STRING_delete(keyName);
    STRING_delete(accessKey);
    STRING_delete(uriResource);
    return result;
}