OK, the trick is to set the attribute enctype="multipart/form-data" on the form whenever your form contains a file upload item. Using the third parameter you can detect if this is the case. This is typical of using file-upload fields in web programming and independent of the formlets. It's also covered in the Happstack tutorial [1] and in the HTML form spec [2]. Good luck, -chris [1] http://tutorial.happstack.com/tutorial/file-uploads [2] http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4 On 23 sep 2009, at 15:35, Colin Adams wrote:

I'm not sure, but the other components of the form work (before I added the file bit, that is), so they will all be using the same method.

I'm using a generic form-handling function named withForm that I got from one of the examples - this code appears to ignore the third component of the tuple.

Note that I don't really understand all of this yet.

2009/9/23 Chris Eidhof <chris@eidhof.nl>:

...

Hey Colin,

The code looks OK to me. Are you sure you are setting the right method for your form? It's the third component of the tuple returned by the runFormState.

Thanks,

-chris

On 22 sep 2009, at 08:56, Colin Adams wrote:

...

I'm writing a form that involves picking a file to upload, and so uses Text.XHtml.Strict.Formlets.file. The form displays OK, but when I click the Browse button, and select a file from the dialog (no matter what the file type), and then click on the Submit button, I get an error:

"fval[2] is not a file"

I haven't added any validation yet.

The generated html looks ok to me:

<input type="file" name="fval[2]" id="fval[2]">

This is on my laptop running Mac OSX. I can't test it on Linux until I get home at the weekend, so I don't know if I've made a silly error in my coding, but it is very simple:

imageInputForm = F.plug (\xhtml -> X.p << (X.label << "Image file:") +++ xhtml) F.file

Are there any known problems with the file formlet? Might it be OSX specific? -- Colin Adams Preston, Lancashire, ENGLAND _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

-- Colin Adams Preston, Lancashire, ENGLAND