正式准备开写了

Cargo.toml

@@ -5,8 +5,20 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
-[dependencies]
-# https://docs.rs/fern/0.6.2/fern/
+[features]
+default = []
+db_log = ["db_logger"]
 
-[[fern]]
-version = "0.6.2"
+[dependencies]
+
+md-5 = "0.10.6"
+sha1 = "0.10.6"
+
+zstd = "0.13.0"
+
+log = "0.4.20"
+[dependencies.db_logger]
+version = "0.1"
+optional = true
+default-features = false
+features = ["postgres"]

src/log.rs

@@ -0,0 +1,4 @@
+
+pub fn init_logging() {
+    
+}

src/main.rs

@@ -1,5 +1,6 @@
-mod file;
+mod log;
+mod utils;
 
 fn main() {
-    println!("Hello, world!");
+
 }

src/utils.rs

@@ -0,0 +1,58 @@
+use std::path::PathBuf;
+use md5::{Md5, Digest};
+use sha1::{Sha1, Digest as Sha1Digest};
+
+/// import {join} from 'path'
+/// 
+/// export function hashToFilename(hash: string): string {
+///     // eslint-disable-next-line @typescript-eslint/no-magic-numbers
+///     return join(hash.substring(0, 2), hash)
+///   }
+pub fn hash_to_filename(hash: &str) -> PathBuf {
+    let mut path = PathBuf::new();
+    path.push(&hash[0..2]);
+    path.push(hash);
+    path
+}
+
+/// import {createHash, Hash} from 'crypto'
+/// 
+/// export function validateFile(buffer: Buffer, checkSum: string): boolean {
+///     let hash: Hash
+///     if (checkSum.length === 32) {
+///       hash = createHash('md5')
+///     } else {
+///       hash = createHash('sha1')
+///     }
+///     hash.update(buffer)
+///     return hash.digest('hex') === checkSum
+///   }
+pub fn validate_file(buffer: &[u8], check_sum: &str) -> bool {
+    match check_sum.len() {
+        32 => {
+            let mut hasher = Md5::new();
+            hasher.update(buffer);
+            let result = hasher.finalize();
+            let result_str = format!("{:x}", result);
+            result_str == check_sum
+        },
+        _ => {
+            let mut hasher = Sha1::new();
+            hasher.update(buffer);
+            let result = hasher.finalize();
+            let result_str = format!("{:x}", result);
+            result_str == check_sum
+        }
+    }
+}
+
+#[test]
+fn test_hash_to_filename() {
+    assert_eq!(hash_to_filename("1234567890abcdef"), PathBuf::from("12/1234567890abcdef"));
+}
+
+#[test]
+fn test_validate_file() {
+    assert_eq!(validate_file(b"hello", "5d41402abc4b2a76b9719d911017c592"), true);
+    assert_eq!(validate_file(b"hello", "5d41402abc4b2a76b9719d911017c593"), false);
+}