document how to pass in urls with ? / & marks

[abubelinha]

Original image url (from IIIF server):
https://merovingio.c2rmf.cnrs.fr/fcgi-bin/iipsrv.fcgi?FIF=PIA03883.pyr.tif&WID=800&CVT=jpeg

I guess this fails because there is a "?" in the original url?
https://images.weserv.nl/?url=merovingio.c2rmf.cnrs.fr/fcgi-bin/iipsrv.fcgi?FIF=PIA03883.pyr.tif&WID=800&CVT=jpeg

// 20220310130335
// https://images.weserv.nl/?url=merovingio.c2rmf.cnrs.fr/fcgi-bin/iipsrv.fcgi?FIF=PIA03883.pyr.tif&WID=800&CVT=jpeg

{
  "status": "error",
  "code": 404,
  "message": "Invalid or unsupported image format. Is it a valid image?"
}

[kleisauke]

Users are expected to URL-encode the given URL, or at least ? to %3F and & to %26, for example:
https://images.weserv.nl/?url=merovingio.c2rmf.cnrs.fr/fcgi-bin/iipsrv.fcgi%3FFIF=PIA03883.pyr.tif%26WID=800%26CVT=jpeg

[abubelinha]

Great!!
I was suspecting something like this, but I asked because I couldn't find it in the FAQ/docs. Now I see other similar issues (#220, #175, ...)

I suggest adding it to FAQs or as a note next to the main example in docs.

[kleisauke]

Indeed, we should probably note this in the docs.

[abubelinha]

I edited the title and reopen the issue as a reminder of adding this to docs.
Feel free to close it if you prefer.

[kleisauke]

Documentation has been updated to note this.
https://wsrv.nl/docs/introduction.html#how-it-works