Lighttpd

mod_uploadprogress needs two more parameters: js-prefix and js-suffix.

js-prefix contains text to be prepended to J-SON output, and js-suffix -- to be appended to the J-SON output.

Motivation: to upload files to the host other then host from which HTML page was loaded.

Say, we have page http://server-a/page.html. And we want to upload files to the http://server-b/upload.cgi

XMLHttpRequest does not allow requests to other hosts, so we cannot ask server-b for upload progress using XMLHttpRequest.

However, any external script can be executed from server-b by creating tag "script" using DHTML.

So if http://server-b/uploader.cgi?X-Progress-ID=abcdabcdabcdabcdabcdabcdabcdabcd contained something like

passUploadProgress(<json-data>)

for example

passUploadProgress(new Object({ 'state' : 'starting' }))

we can fetch upload progress.

(passUploadProgress function can be defined somewhere in page.html)

So we need of configuration options:

upload-progress.js-prefix = "passUploadProgress(" 
upload-progress.js-suffix = ")"