RTOS/EK-TM4C129EXL: TI-RTOS HTTPS POST SAMPLE

Hi Deepak,

This is the code you would use to make a POST:

// Make HTTP 1.1 POST request
//
// Send request to the server:
//
// POST /index.html HTTP/1.1
HTTPCli_sendRequest(&cli, HTTPStd_POST, "/index.html", true);

// Send additional fields (optional)
//
// Content-Length: <length>
// <blank line>
HTTPCli_sendField(&cli, HTTPStd_FIELD_NAME_CONTENT_LENGTH, len, true);

// Send request body
//
// <data>
HTTPCli_sendRequestBody(&cli, data, strlen(data));

You may be able to test with this server:
https://docs.postman-echo.com/?version=latest#1eb1cf9d-2be7-4060-f554-73cd13940174

Hope that helps,
Gerardo

Hi Gerardo,

I have modified the code as you said and coppied the cert from the "https://postman-echo.com" but i'm getting a send failed error.

Here's the code that I have implemented 

#define HOSTNAME "https://postman-echo.com"
#define REQUEST_URI "/"
#define CONTENT_TYPE "application/json"
#define Authorization "Basic"
#define USER_AGENT "HTTPCli (ARM; TI-RTOS)"

Void httpsPostTask(UArg arg0, UArg arg1)
{

bool moreFlag = false;
char data[64];
int ret;
int len;
char CONTENT_LENGTH[3];
struct sockaddr_in addr;

TLS_Params tlsParams;
TLS_Handle tls;

//Data to be sent
strcpy(data, "{\"val\": 10}");

len = strlen(data);
sprintf(CONTENT_LENGTH, "%d", len);

System_printf("\nData: %s\n", data);
System_printf("len(int): %d\n", len);
System_printf("CONTENT_LENGTH: %s\n", CONTENT_LENGTH);

HTTPCli_Params params;
HTTPCli_Struct cli;
HTTPCli_Field fields[5] = {
{ HTTPStd_FIELD_NAME_HOST, HOSTNAME },
{ HTTPStd_FIELD_NAME_AUTHORIZATION, Authorization },
{ HTTPStd_FIELD_NAME_CONTENT_TYPE, CONTENT_TYPE },
{ NULL, NULL }
};

startNTP();

System_printf("Sending a HTTPS GET request to '%s'\n", HOSTNAME);
System_flush();

TLS_Params_init(&tlsParams);
tlsParams.ca = ca;
tlsParams.calen = calen;

tls = TLS_create(TLS_METHOD_CLIENT_TLSV1_2, &tlsParams, NULL);
if (!tls) {
printError("httpsTask: TLS create failed", -1);
}

GPIOPinWrite(GPIO_PORTH_BASE, GPIO_PIN_2, 0);
GPIOPinWrite(GPIO_PORTH_BASE, GPIO_PIN_3, GPIO_PIN_3);

HTTPCli_construct(&cli);

HTTPCli_setRequestFields(&cli, fields);

ret = HTTPCli_initSockAddr((struct sockaddr *)&addr, HOSTNAME, 0);
if (ret < 0) {
printError("httpsTask: address resolution failed", ret);
}

HTTPCli_Params_init(&params);
params.tls = tls;

ret = HTTPCli_connect(&cli, (struct sockaddr *)&addr, 0, &params);
if (ret < 0) {
printError("httpsTask: connect failed", ret);
}

ret = HTTPCli_sendRequest(&cli, HTTPStd_POST, REQUEST_URI, true);
if (ret < 0) {
printError("httpsTask: send failed", ret);
}
else
{
System_printf("sendRequest successful\n");
}

ret = HTTPCli_sendField(&cli, HTTPStd_FIELD_NAME_CONTENT_LENGTH, CONTENT_LENGTH, false);
ret = HTTPCli_sendField(&cli, HTTPStd_FIELD_NAME_CONTENT_TYPE, CONTENT_TYPE, true);

if (ret < 0) {
printError("httpTask: send failed", ret);
}
else {
System_printf("sendField successful\n");
}

ret = HTTPCli_sendRequestBody(&cli, data, strlen(data));
if (ret < 0) {
printError("httpTask: Variable data couldn't be sent", ret);
}
else {
System_printf("Data sent successfully\n");
}

ret = HTTPCli_getResponseStatus(&cli);
if (ret != HTTPStd_OK) {
printError("httpsTask: cannot get status", ret);
}

System_printf("HTTP Response Status Code: %d\n", ret);

ret = HTTPCli_getResponseField(&cli, data, sizeof(data), &moreFlag);
if (ret != HTTPCli_FIELD_ID_END) {
printError("httpsTask: response field processing failed", ret);
}

len = 0;
do {
ret = HTTPCli_readResponseBody(&cli, data, sizeof(data), &moreFlag);
if (ret < 0) {
printError("httpsTask: response body processing failed", ret);
}

len += ret;
} while (moreFlag);

System_printf("Recieved %d bytes of payload\n", len);
System_flush();

HTTPCli_disconnect(&cli);
HTTPCli_destruct(&cli);

TLS_delete(&tls);

}

Do I need to make some other change for this to work?

Regards,

Deepak

Hi Deepak,

Try posting to the /post URI by modifying the following

#define REQUEST_URI "/post"

If that still doesn't work can you tell me which of the HTTPCli calls is not working and what its return status is?

BR,
Gerardo

Hi Gerardo,

I did. Still the same result. My HTTPS GET code is also not working which makes me feel like its an certificate issue. Can you send me the root certificate for postman if you have?

Regards,

Deepak

Hi Deepak,

Update your certificate to the one found here:

https://www.amazontrust.com/repository/AmazonRootCA1.pem

Thanks,
Gerardo