HTML POST data

Using Arduino Project Guidance
#1

Hello,

I trying to use the POSt function in a Webpage, how is the construction of the POST string .
i programmed , with help of a arduino cookbook 2d edition, page 523, the next 3 lines, see below

However, the program written on that page doesn’t work, it seems that the datafiltering is incorrect…But maybe it could also that , see my previous post on the forum, that the website request is twice executed…see link

client.println(“

Click buttons to turn pin 8 on off

”);
client.print("

<input type=‘hidden’ name=‘pinD8’");
client.println(" value=‘0’>");

i assume it is “POST pinD=0” or is it more then that??

Thnaks

#2

see my previous post on the forum, that the website request is twice executed..see link

And jurs explained to you why on that thread.

#3

Any way to override that or do i have to read the request twice into the arduino, before procssing the POST data into the arduino??

Kurt

#4

The web browser is making two requests. One for the page, and the other for the icon.

Technically, you must parse the request for the POST page and the Content-Length. Then, once you receive the blank line, read the Content-Length number of bytes after that. The POST data may come in a separate packet. Most of the time it will come in the same packet as the request.

#5

Hello,

Do you have somekind of example of how the request is build? So the first request end with a newline and also the second request and with a newline...
Do you have an example of the Post string build up?

For now, i just looked for the POST word and then.for the pinD word followed by = and its value.... It works, but is it the correct way to do it?

Thanks..

#6

Here is a thread that has the code in the first post.

#7