How to make http post. No libcurl?

RE: How to make http post. No libcurl?

Piter — Sat, 02 Dec 2023 17:48:07 GMT

I tried to use your http post code implementation but some errors occurred!

RE: How to make http post. No libcurl?

Vidar Berg — Tue, 24 Sep 2019 07:06:38 GMT

DennisNG, please create a new thread for the debugging issue and try to include relevant information about your setup. E.g., what jlink programmer you use, debug log, etc.

RE: How to make http post. No libcurl?

DennisNG — Mon, 23 Sep 2019 19:08:11 GMT

Thanks Hoang!

appreciate the help!

Dennis

RE: How to make http post. No libcurl?

Hoang — Mon, 23 Sep 2019 18:57:32 GMT

hi DennisNG

[quote userid="83332" url="~//nordic-q-a/46094/how-to-make-http-post-no-libcurl/211378"][/quote]

Your code works on Thingy:91 !.

I'm able to flash this in and I could see that its updating ur server! [Sorry for using it]

thats ok, I saw it. No problem for me.

About J-link Debugger problem, Vidar Berg will help you, I dont use it, so I dont know 😞

Good luck

Hoang Nguyen

RE: How to make http post. No libcurl?

DennisNG — Mon, 23 Sep 2019 18:39:46 GMT

Hi Hoang,

Your code works on Thingy:91 !.

I'm able to flash this in and I could see that its updating ur server! [Sorry for using it]

However, I'm having some issues trying to attach my J-link Debugger. It's always giving me a fault when I attach and run. I'm setting a break point in main but it never gets there.

I'm very new with Zephyr.. thanks for bearing with me.

Dennis

RE: How to make http post. No libcurl?

DennisNG — Mon, 23 Sep 2019 07:50:22 GMT

Thanks Hoang! I'll give it a shot.

RE: How to make http post. No libcurl?

Hoang — Mon, 23 Sep 2019 07:49:14 GMT

hi DennisNG

This is the one http post, I m using to run on the THINGY:91

devzone.nordicsemi.com/.../thingy_5F00_91_5F00_http_5F00_23sept.zip

run with ncs_master branch.

Hope it can help

BR,

Hoang Nguyen

RE: How to make http post. No libcurl?

Hoang — Mon, 23 Sep 2019 07:30:39 GMT

hi DennisNG

You want http post,is it right?

RE: How to make http post. No libcurl?

Vidar Berg — Mon, 23 Sep 2019 07:29:12 GMT

I haven't tested, but it should work as long as you build it for the thingy board.

RE: How to make http post. No libcurl?

DennisNG — Mon, 23 Sep 2019 07:26:51 GMT

HI, does this example work for thingy91 ?

RE: How to make http post. No libcurl?

Vidar Berg — Fri, 19 Jul 2019 09:31:17 GMT

Hi,

Please try the http_post sample attached below and see if you get the same result. I used NCS v.1.0.0 and http://ptsv2.com as a test server.

Received POST request:

Project:

devzone.nordicsemi.com/.../http_5F00_post.zip

I'd suggest that you create a new ticket for HTTPS as I don't have experience with it. Maybe this thread is helpful: https://devzone.nordicsemi.com/f/nordic-q-a/48202/https-sample/

RE: How to make http post. No libcurl?

Gwen Stouthuysen — Wed, 17 Jul 2019 14:29:49 GMT

Vidar,

I'm trying you approach that seams very logical to me but somehow my call does not reach the database.

I will have to cover up some aspects but I know that that side of the story is simply operational: the server is there and accepts POST REST calls of this organisation (SIGFOX is using this port to send my data to me)

I just want to avoid someone to start jamming my port for fun.

I did set up the connection parameters, using the right url and port 443.

Set up a template to generate the POST code:

#define POST_TEMPLATE "POST %s HTTP/1.1\r\nHost: %s\r\naccept-encoding: gzip, deflate \r\nConnection: keep-alive\r\nAccept: \*/\* \r\nContent-Type: application/json\r\nContent-length: %d\r\ncache-control: no-cache\r\n%s"

which results in:

POST /REST/MCS1608 HTTP/1.1
Host: xxxxx.xxx
accept-encoding: gzip, deflate
Connection: keep-alive
Accept: */*
Content-Type: application/json
Content-length: 79
cache-control: no-cache
{"device": "D2078B","timestamp":"1563365148","data":"a318e451a084f800f9004e0d"}

Next I created a function:

void app_http_post(void){
	struct sockaddr_in local_addr;
	struct addrinfo *res;
	local_addr.sin_family = AF_INET;
	local_addr.sin_port = htons(0);
	local_addr.sin_addr.s_addr = 0;

	printk("HTTP POST example\n\r");

	int err = getaddrinfo(HTTP_HOST, NULL, NULL, &res);

	printk("getaddrinfo err: %d\n\r", err);
	((struct sockaddr_in *)res->ai_addr)->sin_port = htons(HTTP_PORT);

    /*Prepare POST request*/
    char send_buf[500];
    snprintf(send_buf, 500, POST_TEMPLATE, HTTP_PATH, HTTP_HOST, strlen(TEST_STRING), TEST_STRING);
    int send_data_len = strlen(send_buf);

    printk("POST code:\n\r%s\n\n\r", send_buf);

    /*Open a Socket*/
    int client_fd = socket(AF_INET, SOCK_STREAM, 0);

	printk("client_fd: %d\n\r", client_fd);
	err = bind(client_fd, (struct sockaddr *)&local_addr,
		   sizeof(local_addr));
	printk("bind err: %d\n\r", err);

    /*Send post request*/
    int num_bytes = send(client_fd, send_buf, send_data_len, 0);

	printk("send err: %d\n\r", num_bytes);

	int tot_num_bytes = 0;

    do {
        num_bytes =	blocking_recv(client_fd, recv_buf, RECV_BUF_SIZE, 0);
	    tot_num_bytes += num_bytes;

	    if (num_bytes <= 0) {
		    break;
		}
	    printk("%s", recv_buf);
	  } while (num_bytes > 0);

	printk("\n\rFinished. Closing socket");
	freeaddrinfo(res);
	err = close(client_fd);
}

But I'm not sure whether all is OK as my POSTed information does not go through.

I get no answer from the server (I know when something is wrong the server still answers with a fault code)

send err: -1

I tried with httpbin.org and there the result was the same: no result.

with port 80 the result is the same, so I assume the problem is deeper than not being able to achieve an HTTPS call.

RE: How to make http post. No libcurl?

Vidar Berg — Mon, 15 Apr 2019 14:57:14 GMT

Hi,

I'm not sure if it's possible to port libcurl to nRF9160, but you can use the socket API to make HTTP requests. A colleague has made a HTTP example using the Socket API that's available here: https://github.com/Rallare/fw-nrfconnect-nrf/tree/nrf9160_samples/samples/nrf9160/http. This sample demonstrates how you can send a GET request. For POST requests you can use the following template along with snprintf/sprintf.

#define HTTP_HOST example.com
#define HTTP_PATH <post url>
#define TEST_STRING = "Hello from nrf91"

#define POST_TEMPLATE "POST %s? HTTP/1.1\r\n"\
		"Host: %s\r\n"\
		"Connection: keep-alive\r\n"\
		"Content-Type: text/plain\r\n"\
		"Content-length: %d\r\n\r\n"\
		"%s"

/*Prepare POST request*/
send_data_len = snprintf(send_buf,
				         500, /*total length should not exceed MTU size*/
				         POST_TEMPLATE, HTTP_PATH,
				         HTTP_HOST, strlen(TEST_STRING),
				         TEST_STRING);

/*Send post request*/
blocking_send(client_fd, send_buf, send_data_len, 0);

Edit: defined TEST_STRING

RE: How to make http post. No libcurl?

Hoang — Mon, 15 Apr 2019 10:50:40 GMT

Hi Moshe,

Can you share the code?

thanks,

hng