commit d9bba7c0c69b3050e3c785b4fabb4865f89e71a8
Author: femsci <nya@femboy.science>
Date:   Wed Feb 14 17:51:35 2024 +0100

    ugly smol

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..1dfbde1
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "urlenc"
+version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..edc42df
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "urlenc"
+version = "0.1.0"
+edition = "2021"
+authors = ["femsci"]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f8228c3
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# urlenc
+
+A quick utility for URL percent encoding and decoding
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..f5064eb
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,101 @@
+use std::{
+    fs::File,
+    io::{BufRead, BufReader, Read},
+};
+
+fn main() {
+    let decode = std::env::args().any(|f| f == "-d");
+
+    let mut stream: Box<dyn BufRead> = match std::env::args().last() {
+        Some(x) => {
+            if x == "-" {
+                Box::new(BufReader::new(std::io::stdin()))
+            } else {
+                Box::new(BufReader::new(
+                    File::open(&x).expect(&format!("No file found: {}", &x)),
+                ))
+            }
+        }
+        None => {
+            eprintln!("No file provided!");
+            std::process::exit(1);
+        }
+    };
+
+    if decode {
+        url_decode_stream(&mut stream);
+    } else {
+        url_encode(&mut stream);
+    }
+}
+
+fn url_decode_stream(stream: &mut Box<dyn BufRead>) {
+    let mut str = String::new();
+    let mut buf = Vec::new();
+    let mut val_buf: [u8; 2] = [0; 2];
+
+    while stream.read_until(b'%', &mut buf).expect("Cannot read data") > 0 {
+        let string = String::from_utf8(buf.to_vec()).unwrap().replace('+', " ");
+
+        if !string.ends_with('%') {
+            str.push_str(&string);
+            break;
+        }
+
+        str.push_str(string.trim_end_matches('%'));
+
+        stream
+            .read_exact(&mut val_buf)
+            .expect("Cannot retrieve value");
+
+        let chr = get_char(val_buf[0], val_buf[1]);
+
+        str.push(chr);
+
+        buf.clear();
+    }
+
+    println!("{}", &str);
+}
+
+fn get_char(msc: u8, lsc: u8) -> char {
+    let extract_byte = |x: u8| {
+        let x_chr = (x as char).to_ascii_lowercase();
+
+        if x_chr.is_ascii_digit() {
+            (x_chr as u8) - b'0'
+        } else if x_chr.is_ascii_hexdigit() {
+            (x_chr as u8) - b'a' + 10
+        } else {
+            eprintln!("Invalid character for encoding found: {}", x_chr);
+            std::process::exit(2);
+        }
+    };
+
+    let msb = extract_byte(msc);
+    let lsb = extract_byte(lsc);
+
+    (msb * 16 + lsb) as char
+}
+
+fn get_percent(chr: char) -> String {
+    format!("%{:x}", chr as u8)
+}
+
+fn url_encode(stream: &mut Box<dyn BufRead>) {
+    let mut line = String::new();
+    while stream.read_line(&mut line).expect("Cannot read data") > 0 {
+        let encoded = line
+            .chars()
+            .map(|f| {
+                if f.is_alphanumeric() || ['-', '_', '.', '~'].contains(&f) {
+                    f.to_string()
+                } else {
+                    get_percent(f)
+                }
+            })
+            .collect::<String>();
+        print!("{}", &encoded);
+        line.clear();
+    }
+}