|
37 | 37 | #define TELEMETRY_BUFFER_SIZE 256 |
38 | 38 | #define PROPERTIES_BUFFER_SIZE 128 |
39 | 39 |
|
| 40 | +// define static strings for content type and -encoding on message property bag |
| 41 | +static const UCHAR content_type_property[] = "$.ct"; |
| 42 | +static const UCHAR content_encoding_property[] = "$.ce"; |
| 43 | +static const UCHAR content_type_json[] = "application%2Fjson"; |
| 44 | +static const UCHAR content_encoding_utf8[] = "utf-8"; |
| 45 | + |
40 | 46 | static UCHAR telemetry_buffer[TELEMETRY_BUFFER_SIZE]; |
41 | 47 | static UCHAR properties_buffer[PROPERTIES_BUFFER_SIZE]; |
42 | 48 |
|
@@ -666,6 +672,28 @@ UINT azure_iot_nx_client_publish_telemetry(AZURE_IOT_NX_CONTEXT* context_ptr, |
666 | 672 | return status; |
667 | 673 | } |
668 | 674 |
|
| 675 | + // set the ContentType property on the message to "application/json" (url-encoded) |
| 676 | + status = nx_azure_iot_hub_client_telemetry_property_add(packet_ptr, content_type_property, sizeof( content_type_property )-1, |
| 677 | + content_type_json, sizeof( content_type_json )-1, |
| 678 | + NX_WAIT_FOREVER); |
| 679 | + if (status != NX_AZURE_IOT_SUCCESS) |
| 680 | + { |
| 681 | + printf("Error: cannot set ContentType message property (0x%08X)\r\n", status); |
| 682 | + nx_azure_iot_hub_client_telemetry_message_delete(packet_ptr); |
| 683 | + return status; |
| 684 | + } |
| 685 | + |
| 686 | + // set the ContentEncoding property on the message to "utf-8" |
| 687 | + status = nx_azure_iot_hub_client_telemetry_property_add(packet_ptr, content_encoding_property, sizeof( content_encoding_property )-1, |
| 688 | + content_encoding_utf8, sizeof( content_encoding_utf8 )-1, |
| 689 | + NX_WAIT_FOREVER); |
| 690 | + if (status != NX_AZURE_IOT_SUCCESS) |
| 691 | + { |
| 692 | + printf("Error: Canot set ContentEncoding message property (0x%08X)\r\n", status); |
| 693 | + nx_azure_iot_hub_client_telemetry_message_delete(packet_ptr); |
| 694 | + return status; |
| 695 | + } |
| 696 | + |
669 | 697 | telemetry_length = nx_azure_iot_json_writer_get_bytes_used(&json_writer); |
670 | 698 | if ((status = nx_azure_iot_hub_client_telemetry_send( |
671 | 699 | &context_ptr->iothub_client, packet_ptr, telemetry_buffer, telemetry_length, NX_WAIT_FOREVER))) |
|
0 commit comments