cURL example of test http client

[Johan-Henry]

Good day

I have successfully implemented the HTTP/CoAP proxy application with the HTTP/TLS/IPv4 and CoAP/DTLS/IPv6 example as described in the README, however I would like to replace test_http_client with a standard cURL call. Will this be possible? I have made some progress and can successfully establish a https (tls) connection to the proxy from cURL by using the -k, --key, --cacert and --cert flags together with https://127.0.0.1:12437, however I am not sure where or how to specify the "POST coaps://[::1]:12436/resource" request string in cURL. Can you perhaps provide some guidence or an example?

Any help would be greatly appreciated. Regards

[Johan-Henry]

I solved the above with the cURL command: curl -k -v --key client_privkey.pem --cacert root_server_cert.pem --cert client_cert.pem -H 'Accept:' -X GET https://127.0.0.1:12437/coaps://[::1]:12436/resource

[PalmaITEM]

Hi @Johan-Henry, thanks for sharing your solution.

Unfortunately, when I tried it, I got this on the proxy:

Debug : [0] <0> 127.0.0.1 Received from HTTP client: GET /coaps://[::1]:12436/resource HTTP/1.1 Error : [0] <0> 127.0.0.1 Failed to convert HTTP message to CoAP message: Bad message Debug : [0] <0> 127.0.0.1 Sent to HTTP client: HTTP/1.1 400 Bad Request

Did you experience anything similar?

Thank you in advance

[PalmaITEM]

I don't know if there's a difference between our versions of curl but I had to slightly modify http_msg.c in order to remove the "extra" /.

*** orig_http_msg.c     2017-09-12 09:23:23.341351000 +0200
--- http_msg.c  2017-09-12 09:22:38.685351000 +0200
*************** static ssize_t http_msg_parse_start(http
*** 272,277 ****
--- 272,283 ----

      for (i = 0; i < HTTP_MSG_NUM_START; i++)
      {
+       /* Remove unnecessary '/' */
+         if(*next == '/')
+         {
+             next++;
+         }
+
          start = next;
          if (i < HTTP_MSG_NUM_START - 1)
          {

[Johan-Henry]

Hi, sorry for not getting back to you on your first question, but yes, I had to do the same modification. Quite a hack of a solution but it was sufficient for my testing.

[charlicruz]

Hi Joan, thank you very much for your comments. I would like to ask you a question. I have implemented FreCoAP on two PI cards of the latest model using the functions of test_CoAP_client and test_CoAP_client. I would like to know where I can change the size of the message that is sent from the client to the server. How could I also measure the transmission time: with a function to measure the execution time of the client and server codes? Thank you in advance