URI percent-encoding and decoding
(scm uri) provides URI percent-encoding and decoding — the %XX escaping used in query strings, form bodies, and path segments.
(import (scm uri))
(percent-encode "a b/c") ;; => "a%20b%2Fc"
(percent-decode "a%20b") ;; => "a b"percent-encode leaves the RFC 3986 unreserved set (A–Z a–z 0–9 - _ . ~) untouched and UTF-8-encodes everything else before escaping. percent-decode reverses it, and by default also treats + as a space (the form-urlencoded convention); pass #f as a second argument to keep + literal.
2 bindings
Syntax: (percent-decode s [plus-as-space?]) Library: (scm uri) Description: Decodes percent-escaped UTF-8 in s. When plus-as-space? is true (the default), '+' is treated as space — appropriate for application/x-www-form-urlencoded bodies and query strings. Pass #f to preserve '+' literally (e.g. for URL path segments). Example: (percent-decode "a%20b") => "a b" (percent-decode "a+b") => "a b" (percent-decode "a+b" #f) => "a+b"
Syntax: (percent-encode s) Library: (scm uri) Description: Encodes string s as UTF-8 and percent-escapes every byte outside the RFC 3986 unreserved set (A-Z a-z 0-9 - _ . ~). Suitable for building query values and path segments. Example: (percent-encode "a b/c") => "a%20b%2Fc" (percent-encode "hello") => "hello"