using POST for HTTPclient

Questions » using POST for HTTPclient

10 years, 8 months ago.

I have a basic HTML website

this is my <form> code

<form action="post.php" method="GET">
	Message: <input type="text" name="message" /> &nbsp; 
	
	<input type="submit" name="submit" value="send"> 
</form>

everything is working fine. Im able to Post on my form via web URL

http://192.168.1.54/test/post.php?message=message&submit=send

I want to do the same thing on mbed, and im currently using HTTPClient library, but i cant seem to get it work. below is my code.

char str[512];
char ret;
const char *DATA = "Test&submit=send";



 //POST data
    HTTPMap map;
    HTTPText inText(str, 512);
    map.put("message", DATA);
    printf("\nSending Post...\n");
    ret = http.post("http://192.168.1.54/test/post.php?", map, &inText);
    if (!ret)
    {
      printf("Executed POST successfully - read %d characters\n", strlen(str));
      printf("Result: %s\n", str);
    }
    else
    {
      printf("Error - ret = %d - HTTP return code = %d\n", str, http.getHTTPResponseCode());
    }

and im getting this on my debug

Sending Post...
Executed POST successfully - read 11 characters
Result: invalid // the reply i get from my webpage post.php

Hi,

Can you send me the full code to my mail ID

msarun003@gmail.com

Thanks in Advance :-)

posted by M.S. Arun 07 Mar 2015

1 Answer

10 years, 8 months ago.

i know this is kinda weird, answering my own question. but i manage to solve my own problem. to use HTTPClient POST on a website.

i really didnt have good background on programming, it was hard for me to use the official HTTPClient library and customize it on my specific need. [that] or maybe i just didnt know how to use it correctly. nevertheless, i ended up with this http://mbed.org/users/okini3939/code/TinyHTTP/

the most important part for me is to be able to include a content type in a HTTPpost, in which the above link provides.

/** send http request
 * @param method METHOD_GET or METHOD_POST
 * @param host http server
 * @param uri URI
 * @param head http header (CR+LF) (or NULL)
 * @param body POST body (or NULL)
 * @return http code, -1:failue
 */
int httpRequest (int method, Host *host, char *uri, char *head, char *body);

change the values specific to your requirements.

host.setName("192.168.1.54");
r = httpRequest(METHOD_POST, &host, "/mbedtest/post.php", "Content-Type: application/x-www-form-urlencoded\r\n", "message=input by a micro-controller &submit=send");

and here is my post.php

<?php
include_once("connect.php");

	if (isset($_POST['submit'])) {
		if ($_POST['message'] == "") {
			echo " no input, return";
			exit();
		}
		else {
			$message = $_POST['message'];
			mysql_query("insert into data (message) values ('$message')");
			header ('location:index.php');
			exit ();
		}
	}

	else {
		echo "invalid";
	}

?>

this is my backend MYSQL database. you can see the POST sent by mbed /media/uploads/menski/mbed.png now you can send HTTPpost on your website, or even use it to update facebook/twitter status via PHP SDK :)

Accepted Answer

Not weird at all, good you do it, that way others with the same issue who run into this question also know the answer!

Nothing more irritating than if you have a problem, and while googling for the answer you run into a forumpost of someone else with the same issue, who then mentions he solved it but didn't say how he solved it.

posted by Erik - 09 Aug 2013

Thanks Erik, been really studying about this for more than a week, and whenever i search something about this, google searches ends up on my post. lol. i also updated my answer to better explain my intentions and other details. :)

posted by kilo byte 09 Aug 2013

Thank a lot Kilo. And again thank you for sharing the solution. Best Regards.

posted by Felícito Manzano 16 Dec 2016

kilo byte

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10 years, 8 months ago.