File upload example

the form variables for a multipart/form-data form submission are very different from standard form variables. Since you will need access to all the raw data in the form, the "name" of the form variables includes all the mime information that is normally parsed out. Thus when you have an input field like <name="action" value="upload">, that is in a multipart form, the name of the form variable is something like this:

-Content-Disposition: form-data; name="action"- (as opposed to -action-).

The value, however, shows up as -upload-.

When inside a [raw][formvariables][/raw] loop, you usually would do something like this:

[raw][showif [url][name][/url]^[url]"action"[/url]][/raw].

Thus you cannot easily access a particular form variable without looping through all of them and looking for the name contained in the [raw][name][/raw] parameter.


<!--HAS_WEBDNA_TAGS-->

<html>
Upload an image:<br>
<form method="post" ENCTYPE="multipart/form-data" action="upload.tpl">
<input type="hidden" name="action" value="upload">
Select the file: <input type="file" name="thefile" value=""><br>
Name the file: <input name="thename" value=""><br>
<input type="submit" name="after" value="ok">
</form>
<br>
<br>

[text]thename=[/text]
[formvariables]
[showif [url][name][/url]^[url]"thename"[/url]]
[text]thename=[value][/text]
[/showif]
[/formvariables]

[hideif [thename]=]
Form Variables:<br>
<table border=1>
<tr><td>Index</td><td>Name</td></tr>
[formvariables]
<tr><td>[index]</td><td><pre>[name]</pre></td></tr>
[/formvariables]
</table>

<br>

[formvariables]
[showif [url][name][/url]^[url]"theFile"[/url]]
[writefile file=[thename]&secure=F][value][/writefile]
[/showif]
[/formvariables]

<a href="[thename]">see picture</a>
[/hideif]
</html>

DOWNLOAD WEBDNA NOW!

Top Articles:

F.A.Q

A compilation of some user's questions...

Tips and Tricks

A list of user-submitted tips ...

Download WebDNA Applications

WebDNA applications...

WebDNA reference

A list of all WebDNA instructions...

WebDNA Libraries

A list of available libraries for WebDNA...

WebDNA Modules

A list of the currently available modules...

Related Readings:

random password-generator code

Generate a random alpha-numeric string...

Extracting the first sentence out of a block of text

I need to extract the first sentence out of a block of text...

ImageMagick

Use ImageMagick to manipulate images when you upload them...

How to setup CODA to work with WebDNA?

This page will show graphically how to setup CODA as a WebDNA partner :-)...

reCAPTCHA code

reCAPTCHA helps prevent automated abuse of your site (such as comment spam or bogus registrations) by using a CAPTCHA to ensure that only humans perform certain actions...

How many working days?

This small script finds the number of working days between two dates...