37 lines
1.1 KiB
Rust
37 lines
1.1 KiB
Rust
const INPUT1: &str = "http%3A%2F%2Ffoo%20bar%2F";
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const INPUT2: &str = "google.com/search?q=%60Abdu%27l-Bah%C3%A1";
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fn append_frag(text: &mut String, frag: &mut String) {
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if !frag.is_empty() {
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let encoded = frag.chars()
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.collect::<Vec<char>>()
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.chunks(2)
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.map(|ch| {
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u8::from_str_radix(&ch.iter().collect::<String>(), 16).unwrap()
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}).collect::<Vec<u8>>();
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text.push_str(&std::str::from_utf8(&encoded).unwrap());
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frag.clear();
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}
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}
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fn decode(text: &str) -> String {
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let mut output = String::new();
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let mut encoded_ch = String::new();
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let mut iter = text.chars();
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while let Some(ch) = iter.next() {
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if ch == '%' {
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encoded_ch.push_str(&format!("{}{}", iter.next().unwrap(), iter.next().unwrap()));
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} else {
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append_frag(&mut output, &mut encoded_ch);
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output.push(ch);
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}
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}
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append_frag(&mut output, &mut encoded_ch);
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output
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}
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fn main() {
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println!("{}", decode(INPUT1));
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println!("{}", decode(INPUT2));
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}
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