qr code gen

Cargo.lock

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- "winapi",
-]
-
-[[package]]
-name = "winapi-x86_64-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

Cargo.toml

@@ -7,9 +7,10 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-ferris-says = "0.1.1"
-rand = "0.7.3"
-chrono = "0.4.11"
+#ferris-says = "0.1.1"
+#rand = "0.7.3"
+#chrono = "0.4.11"
 image = "0.23.1"
 qrcode = "0.12.0"
-leptess = "0.8.1"
+#leptess = "0.8.1"
+base64 = "0.12.0"

README.md

@@ -55,3 +55,64 @@ replace-with = 'ustc'
 [source.ustc]
 registry = "git://mirrors.ustc.edu.cn/crates.io-index"
 ```
+
+### 交叉编译
+
+以MAC OS X作为上位机为例
+
+**安装musl相关交叉编译工具链**
+
+> brew install FiloSottile/musl-cross/musl-cross
+
+要下载很多内容，耐心等待
+
+可以加 --with-arm --with-arm-hf --with-i486 等选择平台，默认是带 --with-x86_64，也可以通过 --without-x86_64 取消
+
+安装位置在 /usr/local/Cellar/musl-cross
+
+关于在mac下基于muslc交叉编译linux、win目标的rust（或涉及到cgo的golang）程序的官方文档见：
+[filippo.io](https://blog.filippo.io/easy-windows-and-linux-cross-compilers-for-macos/)
+
+**安装交叉编译目标环境rust包**
+
+查看已安装或支持的目标平台
+
+> rustup target list
+
+如果未安装想要的，通过类似如下命令安装
+
+> rustup target add x86_64-unknown-linux-musl
+
+或
+
+> rustup target add armv7-unknown-linux-musleabi
+
+等等
+
+编辑 ~/.cargo/config，追加与目标平台相应的配置，linker的程序名字到musl-cross安装目录bin子目录里找
+
+```
+[target.x86_64-unknown-linux-musl]
+linker = "x86_64-linux-musl-gcc"
+```
+
+或
+
+```
+[target.armv7-unknown-linux-musleabi]
+linker = "arm-linux-musleabi-ld"
+```
+
+等等
+
+export CROSS_COMPILE=x86_64-linux-musl-
+
+**交叉编译**
+
+执行编译命令时带上目标平台参数即可
+
+> cargo build --release --target=x86_64-unknown-linux-musl
+
+如遇 openssl 相关编译错误，参考：https://github.com/richfelker/musl-cross-make/issues/65
+
+CI工具中做rust交叉编译也可以考虑用现成的或自定义docker镜像，如： https://github.com/clux/muslrust

src/main.rs

@@ -17,9 +17,6 @@
 // use std::io::{stdout, BufWriter};
 // use ferris_says::say;
 
-use qrcode::QrCode;
-use image::Luma;
-
 fn main() {
     // let stdout = stdout();
     // let out = b"Hello fellow Rustaceans!";
@@ -35,13 +32,65 @@ fn main() {
     // println!();
     // test_next_id();
 
-    let code = QrCode::new(b"http://a.com").unwrap();
-    let image = code.render::<Luma<u8>>().build();
-    image.save("./tmp/qrcode.png").unwrap();
+    // QRCode
+    let arr_first = [
+        '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+        'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
+        'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
+    ];
+    let arr_domain = [
+        '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.', '-',
+        'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
+        'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
+    ];
+    for size in 2..47 { // 英文域名长度2到46个字符
+        for c in arr_first.iter() {
+            walk(format!("{}", c).as_str(), size - 1, &arr_domain)
+        }
+    }
+
+    // OCR
+    // let mut lt = leptess::LepTess::new(None, "chi_sim").unwrap();
+    // lt.set_image("./tmp/qrcode.png");
+    // println!("OCR result:{}", lt.get_utf8_text().unwrap());
+}
+
+fn walk(s: &str, level: i32, arr: &[char]) {
+    for c in arr.iter() {
+        let new_s = format!("{}{}", s, c);
+        if level == 0 {
+            let data_http = format!("http://{}.com", new_s);
+            qr_code_gen(data_http.as_str());
+
+            let data_https = format!("https://{}.com", new_s);
+            qr_code_gen(data_https.as_str());
+        } else {
+            walk(new_s.as_str(), level - 1, arr)
+        }
+    }
+}
+
+fn qr_code_gen(data: &str) {
+    //println!("QR code for {}", data);
+
+    let out_path = "./tmp";
+    let name = base64::encode(data);
+
+    let code_m = qrcode::QrCode::new(data).unwrap();
+    let image_m = code_m.render::<image::Luma<u8>>().build();
+    image_m.save(format!("{}/{}_M.png", out_path, name)).unwrap();
+
+    let code_l = qrcode::QrCode::with_error_correction_level(data, qrcode::EcLevel::L).unwrap();
+    let image_l = code_l.render::<image::Luma<u8>>().build();
+    image_l.save(format!("{}/{}_L.png", out_path, name)).unwrap();
+
+    let code_q = qrcode::QrCode::with_error_correction_level(data, qrcode::EcLevel::Q).unwrap();
+    let image_q = code_q.render::<image::Luma<u8>>().build();
+    image_q.save(format!("{}/{}_Q.png", out_path, name)).unwrap();
 
-    let mut lt = leptess::LepTess::new(None, "eng").unwrap();
-    lt.set_image("./tmp/qrcode.png");
-    println!("OCR result:{}", lt.get_utf8_text().unwrap());
+    let code_h = qrcode::QrCode::with_error_correction_level(data, qrcode::EcLevel::H).unwrap();
+    let image_h = code_h.render::<image::Luma<u8>>().build();
+    image_h.save(format!("{}/{}_H.png", out_path, name)).unwrap();
 }
 
 // fn test_next_id() {