# This script demonstrates how to send form data from the client browser
# back up to the server using an XMLHttpRequest with
# application/x-www-form-urlencoded content.
#
package require wapp
# The default page paints a form to be submitted.
# The default content-security-policy of Wapp restricts the use
# of in-line javascript, so the script content must be returned by
# a separate resource.
#
proc wapp-default {} {
wapp-trim {
<h1>Example Of Sending application/x-www-form-urlencoded Using AJAX</h1>
<form id="nameForm">
<table border="0">
<tr><td align="right"><label for="firstName">First name:</label> </td>
<td><input type="text" id="firstName" width="20">
<tr><td align="right"><label for="lastName">Last name:</label> </td>
<td><input type="text" id="lastName" width="20">
<tr><td align="right"><label for="age">Age:</label> </td>
<td><input type="text" id="age" width="6">
<tr><td><td><input type="submit" value="Send">
</table>
</form>
<script src='%url([wapp-param SCRIPT_NAME]/script.js)'></script>
}
}
# This is the javascript that takes control of the form and causes form
# submissions to be send using XMLHttpRequest with urlencoded content.
#
proc wapp-page-script.js {} {
wapp-mimetype text/javascript
wapp-cache-control max-age=3600
wapp-trim {
document.getElementById("nameForm").onsubmit = function(){
function val(id){
return encodeURIComponent(document.getElementById(id).value)
}
var jx = "firstname="+val("firstName")+
"&lastname="+val("lastName")+
"&age="+val("age");
var xhttp = new XMLHttpRequest();
xhttp.open("POST", "%string([wapp-param SCRIPT_NAME])/acceptajax", true);
xhttp.setRequestHeader("Content-Type",
"application/x-www-form-urlencoded");
xhttp.send(jx);
return false
}
}
}
# This page accepts a form submission and prints it on standard output.
# A real server would do something useful with the data.
#
proc wapp-page-acceptajax {} {
puts "Accept Callback"
puts "mimetype: [list [wapp-param CONTENT_TYPE]]"
puts "content: [list [wapp-param CONTENT]]"
foreach var [lsort [wapp-param-list]] {
if {![regexp {^[a-z]} $var]} continue
puts "$var = [list [wapp-param $var]]"
}
}
wapp-start $argv