Uploading to exist-db (controller issue?) - exist-db

Question

All of the files are available at http://gist.github.com/tonyahowe -- page.html, app.xql, upload.html, and form1.html. The app:upload function in appxql is at line 378.
I am trying to add an upload feature to my application here (http://nic.cerosia.org) and have been able to get the upload to work without integrating it into the whole application. Once I integrate it, I get a 400 error message, included below. I think the problem might be a controller issue, but I'm not sure?
I have added a simple link from the index to upload.html page, as follows:
<div xmlns="http://www.w3.org/1999/xhtml" data-template="templates:surround" data-template-with="templates/page.html" data-template-at="main">
<form enctype="multipart/form-data" method="post" action="form1.html">
<fieldset>
<legend>Upload Document:</legend>
<input type="file" name="file"/>
<button id="f-btn-upload" name="f-btn-upload" value="true" type="submit" class="btn btn-danger">Upload</button>
</fieldset>
</form>
</div>
That sends the upload file to form1.html, which basically figures out what to do with different form actions (it works with the first two options):
<div xmlns="http://www.w3.org/1999/xhtml" data-template="templates:surround" data-template-with="templates/page.html" data-template-at="main">
<div/>
<!-- if a query search -->
<div data-template="templates:if-parameter-set" data-template-param="query">
<div data-template="templates:include" data-template-path="search.html" class="col-md-12"/>
</div>
<!-- if a coursepack search -->
<div data-template="templates:if-parameter-set" data-template-param="f-btn-coursepack">
<div data-template="templates:include" data-template-path="coursepack.html" class="col-md-12"/>
</div>
<!-- if an upload -->
<div data-template="templates:if-parameter-set" data-template-param="f-btn-upload">
<div data-template="templates:include" data-template-path="success.html" class="col-md-12"/>
<div data-template="app:upload"/>
</div>
</div>
The app:upload is here:
declare function app:upload($node as node(), $model as map(*), $type as xs:string?) {
let $collection := '/db/apps/NiC/inReview/'
let $filename := request:get-uploaded-file-name('file')
(: make sure you use the right user permissions that has write access to this collection :)
let $login := xmldb:login($collection, 'public', 'public')
let $store := xmldb:store($collection, $filename, request:get-uploaded-file-data('file'))
return
<results>
<message>File {$filename} has been stored at collection={$collection}.</message>
</results>
};
I keep getting an error that I think has something to do with the controller, but I'm not sure. Can anyone help me figure out where the problem is? It may also be a templating issue?
Here's the error:
HTTP ERROR 400
Problem accessing /exist/apps/NiC/works/form1.html. Reason:
SAX exception while parsing request: Content is not allowed in prolog.

Answer 1

I don't know for sure, but I wonder if it is an issue with the templating framework reading the data from the request body and then it not being available in your app:upload function.
I wonder if we could test this, perhaps instead of checking for f-btn-upload which will be in the body of the HTTP request, you could instead check for a query-string parameter. If you change your form in the upload.html page to be like this:
<form enctype="multipart/form-data" method="post" action="form1.html?do-upload=true">
and the switch in your form1.html to be like this:
<div data-template="templates:if-parameter-set" data-template-param="do-upload">
Does that help you at all?