Drakma encodes spaces in URLs as pluses instead of "%20"s. It also leaves
the characters "$-_.!*'()" unencoded instead of the RFC3986 unencoded set:
"-_.~".
This is okay for tolerant servers but for other applications it is a bug.
For example, in OAuth it is necessary to conform to RFC3986 or the signature
will be incorrect for the request.
To make Drakma more RFC3986-compliant, replace these four lines in
util.lisp:
(find char "$-_.!*'()," :test #'char=))
(write-char char out))
((char= char #\Space)
(write-char #\+ out))
with these two:
(find char "-_.~" :test #'char=))
(write-char char out))
Best regards,
Red
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