Add function to generate random paths

Cargo.lock

@@ -878,7 +878,7 @@ dependencies = [
  "futures",
  "log",
  "parking_lot",
- "rand",
+ "rand 0.8.5",
  "redis-protocol",
  "semver",
  "socket2",
@@ -1008,7 +1008,19 @@ checksum = "a06fddc2749e0528d2813f95e050e87e52c8cbbae56223b9babf73b3e53b0cc6"
 dependencies = [
  "cfg-if",
  "libc",
- "wasi",
+ "wasi 0.11.0+wasi-snapshot-preview1",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26145e563e54f2cadc477553f1ec5ee650b00862f0a58bcd12cbdc5f0ea2d2f4"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "r-efi",
+ "wasi 0.14.2+wasi-0.2.4",
 ]
 
 [[package]]
@@ -1736,7 +1748,7 @@ dependencies = [
  "oco_ref",
  "or_poisoned",
  "paste",
- "rand",
+ "rand 0.8.5",
  "reactive_graph",
  "rustc-hash 2.1.0",
  "send_wrapper",
@@ -2014,6 +2026,7 @@ dependencies = [
  "once_cell",
  "openssl",
  "pbkdf2",
+ "rand 0.9.1",
  "reqwest",
  "serde",
  "server_fn",
@@ -2192,7 +2205,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2886843bf800fba2e3377cff24abf6379b4c4d5c6681eaf9ea5b0d15090450bd"
 dependencies = [
  "libc",
- "wasi",
+ "wasi 0.11.0+wasi-snapshot-preview1",
  "windows-sys",
 ]
 
@@ -2359,7 +2372,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "346f04948ba92c43e8469c1ee6736c7563d71012b17d40745260fe106aac2166"
 dependencies = [
  "base64ct",
- "rand_core",
+ "rand_core 0.6.4",
  "subtle",
 ]
 
@@ -2612,6 +2625,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "r-efi"
+version = "5.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74765f6d916ee2faa39bc8e68e4f3ed8949b48cccdac59983d287a7cb71ce9c5"
+
 [[package]]
 name = "r2d2"
 version = "0.8.10"
@@ -2630,8 +2649,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
 dependencies = [
  "libc",
- "rand_chacha",
+ "rand_chacha 0.3.1",
- "rand_core",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9fbfd9d094a40bf3ae768db9361049ace4c0e04a4fd6b359518bd7b73a73dd97"
+dependencies = [
+ "rand_chacha 0.9.0",
+ "rand_core 0.9.3",
 ]
 
 [[package]]
@@ -2641,7 +2670,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
 dependencies = [
  "ppv-lite86",
- "rand_core",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.9.3",
 ]
 
 [[package]]
@@ -2650,7 +2689,16 @@ version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.13",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99d9a13982dcf210057a8a78572b2217b667c3beacbf3a0d8b454f6f82837d38"
+dependencies = [
+ "getrandom 0.3.3",
 ]
 
 [[package]]
@@ -3571,7 +3619,7 @@ dependencies = [
  "futures",
  "http",
  "parking_lot",
- "rand",
+ "rand 0.8.5",
  "serde",
  "serde_json",
  "thiserror 1.0.63",
@@ -3771,7 +3819,7 @@ version = "1.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8c5f0a0af699448548ad1a2fbf920fb4bee257eae39953ba95cb84891a0446a"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.13",
 ]
 
 [[package]]
@@ -3811,6 +3859,15 @@ version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
+[[package]]
+name = "wasi"
+version = "0.14.2+wasi-0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9683f9a5a998d873c0d21fcbe3c083009670149a8fab228644b8bd36b2c48cb3"
+dependencies = [
+ "wit-bindgen-rt",
+]
+
 [[package]]
 name = "wasm-bindgen"
 version = "0.2.100"
@@ -4206,6 +4263,15 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "wit-bindgen-rt"
+version = "0.39.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f42320e61fe2cfd34354ecb597f86f413484a798ba44a8ca1165c58d42da6c1"
+dependencies = [
+ "bitflags 2.5.0",
+]
+
 [[package]]
 name = "write16"
 version = "1.0.0"

Cargo.toml

@@ -63,6 +63,7 @@ reqwest = { version = "0.12.9", default-features = false, optional = true }
 futures = { version = "0.3.25", default-features = false, optional = true }
 once_cell = { version = "1.20", default-features = false, optional = true }
 libretunes_macro = { git = "https://git.libretunes.xyz/LibreTunes/LibreTunes-Macro.git", branch = "main" }
+rand = { version = "0.9.1", optional = true }
 
 [features]
 hydrate = [
@@ -95,6 +96,7 @@ ssr = [
   "flexi_logger",
   "leptos-use/ssr",
   "image-convert",
+  "rand",
 ]
 reqwest_api = [
   "reqwest",

src/util/mod.rs

@@ -9,6 +9,7 @@ cfg_if! {
         pub mod auth_backend;
         pub mod redis;
         pub mod extract_field;
+        pub mod random_path;
     }
 }
 

src/util/random_path.rs

@@ -0,0 +1,36 @@
+/// Generates random paths for storing assets
+use rand::{rng, Rng};
+use std::ffi::OsStr;
+use std::path::PathBuf;
+
+/// Generate a random path for storing a new file
+/// The path will be in the format `base_path/XX/XXXXXXXXXX.extension`
+pub fn checked_random_path<P: Into<PathBuf>, E: AsRef<OsStr>>(
+    base_path: P,
+    extension: E,
+) -> PathBuf {
+    let base_path: PathBuf = base_path.into();
+    let mut rng = rng();
+
+    // Loop until we find a path that does not exist
+    // If the existance check fails, we assume the path does not exist
+    // since it is extremely unlikely to encounter a collision anyway
+    loop {
+        let random_bytes: [u8; 16] = rng.random();
+
+        let dir_part = format!("{:02x}", random_bytes[0]);
+        let file_part = random_bytes[1..]
+            .iter()
+            .map(|byte| format!("{byte:02x}"))
+            .collect::<String>();
+
+        let path = base_path
+            .join(dir_part)
+            .join(file_part)
+            .with_extension(&extension);
+
+        if !path.try_exists().unwrap_or(false) {
+            return path;
+        }
+    }
+}