minify the output size

Cargo.lock

@@ -533,6 +533,7 @@ dependencies = [
  "image",
  "qrcode",
  "tokio",
+ "urlencoding",
  "warp",
 ]
 
@@ -1191,6 +1192,12 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "urlencoding"
+version = "2.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "daf8dba3b7eb870caf1ddeed7bc9d2a049f3cfdfae7cb521b087cc33ae4c49da"
+
 [[package]]
 name = "utf-8"
 version = "0.7.6"

Cargo.toml

@@ -9,6 +9,7 @@ edition = "2021"
 image = "0.23.0"
 qrcode = "0.12.0"
 tokio = { version = "1.33.0", features = ["full"] }
+urlencoding = "2.1.3"
 warp = "0.3.6"
 
 [profile.release]

src/main.rs

@@ -1,5 +1,6 @@
 use qrcode::QrCode;
 use image::{Luma, png::PngEncoder};
+use urlencoding::decode;
 
 use warp::{Filter, reply::Response};
 
@@ -14,9 +15,14 @@ async fn main() {
                     .and(
                         warp::get()
                     )
-                    .map(|x| {
+                    .map(|x: String| {
-                            let code = QrCode::new(x).unwrap();
+                            let text = decode(x.as_str()).unwrap().to_string();
-                            let img = code.render::<Luma<u8>>().build();
+                            let code = QrCode::with_error_correction_level(text, qrcode::EcLevel::M).unwrap();
+                            let img = code
+                                .render::<Luma<u8>>()
+                                .quiet_zone(false)
+                                .module_dimensions(1, 1)
+                                .build();
 
                             let mut out = Vec::<u8>::new();
                             let enc = PngEncoder::new(&mut out);