AN2675

IAP using HTTP

17/24

The HTML code to include in the web page in order to request a file from a user is as fol-

lows:

<FORM action="_URL_" METHOD=POST ENCTYPE="multipart/form-data">

<h2>Select a file to upload : </h2>

<INPUT type=”file”

name=”userfile”><BR><BR>

<INPUT type=”submit” value="Send File" name=”button”>

</FORM>

That will give the form below:

Figure 12.

Upload File Form

Selecting the “Browse” button would cause the browser to enter into a file selection mode

appropriate for the platform.

When the user completes the form, and selects the SUBMIT element, the browser should

send the form data and the content of the selected files.

3.4

IAP method

With this method, the file upload user interface uses an HTML form.

The client, in this case a PC that contains the binary file of the new firmware, must connect

to the STR912 board, which include an embedded Web server, and ask for the directory

containing the file to be uploaded.

The client first asks for the home page that contains a file upload form by sending a GET

Request. Then it submits the file to upload.

The communication between the HTTP server, in this case the IAP application, and the

HTTP client, a PC, is shown in Figure 13.

NO