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### $Request->FileUpload( $field_name )

    if( my $file = $Request->FileUpload('avatar_pic') ) {
      # Handle the uploaded file:
      $file->SaveAs( "/var/media/$Session->{user_id}/avatar/" . $file->FileName );
    }

See also the [ASP4::FileUpload](http://search.cpan.org/perldoc?ASP4::FileUpload) documentation.

## $Response

An instance of [ASP4::Response](http://search.cpan.org/perldoc?ASP4::Response), the `$Response` object gives shortcuts for dealing
with the outgoing reply from the server back to the client.

Examples:

### $Response->Write( $string )

The following example prints the string `Hello, World!` to the browser:

    $Response->Write("Hello, World!");

Or, within an ASP script, `<%= "Hello, World" %>`

### $Response->Redirect( $url )

    $Response->Redirect( "/new/url/?foo=bar" );

### $Response->SetCookie( %args )

Setting cookies works as follows:

    $Response->SetCookie(
      name  => "cookie-name",
      value => "the-value",
      

    # The rest of these arguments are optional:
    

    # Expires: (If you don't specify the "expires" argument, the cookie will
    # be deleted when the browser is closed.
    expires => "3D",  # 3 days
    expires => "3H",  # or 3 hours
    expires => "3M",  # or 3 minutes
    

    # Domain: (defaults to $ENV{HTTP_HOST})
    domain  => ".example.com",    # works for *.example.com
    domain  => "www.example.com", # will ONLY work for www.example.com
    

      # Path:
      path    => "/some/folder/"    # will ONLY work within /some/folder/ on your website
    );

### $Response->Include( $path, %args )

ASP4's `$Response` object offers 3 different include methods.

    <!-- Normal SSI-style Include -->
    <!-- #include virtual="/includes/page.asp" -->

If you want to supply arguments to the included ASP script you can use `$Response->Include($path, \%args)`

    # Add the output of C</includes/page.asp> to the current output buffer:
    my %args = ( foo => "bar" );
    $Response->Include( $Server->MapPath("/includes/page.asp"), \%args );

`\%args` is optional.

Within the included ASP script, `\%args` is accessible like this:

    <%
      my ($self, $context, $args) = @_;
    %>

### $Response->TrapInclude( $path, %args )

Or if you need to capture the result of executing an ASP script and use it within
a variable, use `$Response->TrapInclude($path, \%args)`

    # Capture the output of C</includes/page.asp>:
    my %args = ( foo => "bar" );
    my $html = $Response->TrapInclude( $Server->MapPath("/includes/page.asp"), \%args );

`\%args` is optional.

Within the included ASP script, `\%args` is accessible like this:

    <%
      my ($self, $context, $args) = @_;
    %>

## $Session

The `$Session` object is an instance of a subclass of [ASP4::SessionStateManager](http://search.cpan.org/perldoc?ASP4::SessionStateManager)
(depending on your website's configuration).

The `$Session` object is a simple blessed hashref and should be used like a hashref.

Examples:

### Set a session variable

    $Session->{foo} = "bar";

    $Session->{thing} = {
      banana  => "yellow",
      cherry  => "red",
      peach   => "pink,
    };

### Get a session variable

    my $foo = $Session->{foo};

### $Session->save()

Called automatically at the end of every successful request, causes any changes
to the `$Session` to be saved to the database.

README.markdown  view on Meta::CPAN

    

    # password2:
    if( length($Form->{password2}) ) {
      if( length($Form->{password}) ) {
        unless( $Form->{password} eq $Form->{password2} ) {
          $errors->{password2} = "Passwords don't match";
        }
      }
    }
    else {
      $errors->{password2} = "Required";
    }
    

    # Bail out of we already have errors:
    return $errors if keys %$errors;
    

    # See if the user already exists:
    if( App::db::user->count_search( email => $Form->{email} ) ) {
      $errors->{email} = "Already in use";
    }
    

      # Errors or not?:
      keys %$errors ? return $errors : return;
    }
    

    1;# return true:

File: `htdocs/profile.asp`

    <%@ Page UseMasterPage="/masters/global.asp" %>
    

    <asp:Content PlaceHolderID="meta_title">My Profile</asp:Content>
    

    <asp:Content PlaceHolderID="headline">My Profile</asp:Content>
    

    <asp:Content PlaceHolderID="main_content">
    <%
      if( my $msg = $Session->{msg} ) {
    %>
      <div class="message"><%= $msg %></div>
    <%
      }# end if()
    %>
    

    <%
      # Get our $user:
      use App::db::user;
      my $user = App::db::user->retrieve( $Session->{user_id} );
    %>
    

    <div style="float: left; width: 40%; border-right: solid 1px #000;">
      <h3>Incoming Messages</h3>
    <%
      foreach my $msg ( $user->messages_in(undef, { order_by => "created_on ASC"} ) ) {
    %>
      <div class="msg">
        <span class="from"><%= $msg->sender->email %></span> says:<br/>
        <div class="body"><%= $Server->HTMLEncode( $msg->body ) %></div>
        <span class="date"><%= $msg->created_on %></span>
      </div>
    <%
      }# end foreach()
    %>
    </div>
    

    <div style="float: right; width: 40%; border: dotted 1px #000;">
      <h3>Send New Message</h3>
      <form id="send_form" method="post" action="/handlers/app.send">
        <p>
          <label>Recipient:</label>
          <select name="to_user_id">
    <%
      my @users = App::db::user->search_where({
        user_id => {'!=' => $user->id }
      }, {
        order_by => "email"
      });
      foreach my $user ( @users ) {
    %>
            <option value="<%= $user->id %>"><%= $Server->HTMLEncode( $user->email ) %></option>
    <%
      }# end foreach()
    %>
          </select>
        </p>
        <p>
          <label>Subject:</label>
          <input type="text" name="subject" maxlength="100" />
        </p>
        <p>
          <label>Message:</label><br/>
          <textarea name="body"></textarea>
        </p>
        <p>
          <input type="submit" value="Send Message" />
        </p>
      </form>
    </div>
    </asp:Content>

The form submits to `/handlers/app.send` which maps to `handlers/app/send.pm`

File: `handlers/app/send.pm`

    package app::send;
    

    use strict;
    use warnings 'all';
    use base 'ASP4::FormHandler';
    use vars __PACKAGE__->VARS;
    use App::db::user;
    use App::db::message;
    

    sub run {
      my ($self, $context) = @_;
      

    # Create the message:
    my $msg = eval {
      App::db::message->do_transaction(sub {
        my $msg = App::db::message->create(
          from_user_id  => $Session->{user_id},
          to_user_id    => $Form->{to_user_id},
          subject       => $Form->{subject},