feat: update file writing methods to use async I/O and improve dependency versions

Cargo.lock

@@ -303,7 +303,7 @@ dependencies = [
  "atomic",
  "pear",
  "serde",
- "toml",
+ "toml 0.8.23",
  "uncased",
  "version_check",
 ]
@@ -442,7 +442,7 @@ dependencies = [
  "serde",
  "serde_json",
  "tokio",
- "toml",
+ "toml 0.9.2",
  "url",
 ]
 
@@ -1259,6 +1259,15 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_spanned"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "40734c41988f7306bb04f0ecf60ec0f3f1caa34290e4e8ea471dcd3346483b83"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "serde_urlencoded"
 version = "0.7.1"
@@ -1461,11 +1470,26 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc1beb996b9d83529a9e75c17a1686767d148d70663143c7854d8b4a09ced362"
 dependencies = [
  "serde",
- "serde_spanned",
+ "serde_spanned 0.6.9",
- "toml_datetime",
+ "toml_datetime 0.6.11",
  "toml_edit",
 ]
 
+[[package]]
+name = "toml"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed0aee96c12fa71097902e0bb061a5e1ebd766a6636bb605ba401c45c1650eac"
+dependencies = [
+ "indexmap",
+ "serde",
+ "serde_spanned 1.0.0",
+ "toml_datetime 0.7.0",
+ "toml_parser",
+ "toml_writer",
+ "winnow",
+]
+
 [[package]]
 name = "toml_datetime"
 version = "0.6.11"
@@ -1475,6 +1499,15 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "toml_datetime"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bade1c3e902f58d73d3f294cd7f20391c1cb2fbcb643b73566bc773971df91e3"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "toml_edit"
 version = "0.22.27"
@@ -1483,18 +1516,33 @@ checksum = "41fe8c660ae4257887cf66394862d21dbca4a6ddd26f04a3560410406a2f819a"
 dependencies = [
  "indexmap",
  "serde",
- "serde_spanned",
+ "serde_spanned 0.6.9",
- "toml_datetime",
+ "toml_datetime 0.6.11",
  "toml_write",
  "winnow",
 ]
 
+[[package]]
+name = "toml_parser"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97200572db069e74c512a14117b296ba0a80a30123fbbb5aa1f4a348f639ca30"
+dependencies = [
+ "winnow",
+]
+
 [[package]]
 name = "toml_write"
 version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5d99f8c9a7727884afe522e9bd5edbfc91a3312b36a77b5fb8926e4c31a41801"
 
+[[package]]
+name = "toml_writer"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fcc842091f2def52017664b53082ecbbeb5c7731092bad69d2c63050401dfd64"
+
 [[package]]
 name = "tower"
 version = "0.5.2"

Cargo.toml

@@ -6,14 +6,19 @@ edition = "2024"
 [dependencies]
 anyhow = "1.0.98"
 backon = "1"
-clap = { version = "4.5.40", features = ["derive"] }
+clap = { version = "4", features = ["derive"] }
 futures = "0.3"
 regex = "1.11.1"
 reqwest = { version = "0.12.22", features = ["json"] }
 serde_json = "1.0.140"
-tokio = { version = "1.46", features = ["macros", "rt-multi-thread", "time"] }
+tokio = { version = "1.46", features = [
+    "macros",
+    "rt-multi-thread",
+    "time",
+    "fs",
+] }
 url = { version = "2.5.4", features = ["serde"] }
 async-stream = "0.3"
 figment = { version = "0.10.19", features = ["env", "toml"] }
 serde = { version = "1.0.219", features = ["derive"] }
-toml = "0.8"
+toml = "0.9"

src/adapters/output/local.rs

@@ -1,11 +1,15 @@
 use crate::types::ApiKey;
 use anyhow::Result;
 use std::{fs, io::Write};
+use tokio::io::{AsyncWriteExt, BufWriter};
 use toml::Value;
 
 // Write valid key to output file
-pub fn write_keys_txt_file(file: &mut fs::File, key: &ApiKey) -> Result<()> {
+pub async fn write_keys_txt_file(
-    writeln!(file, "{}", key.as_str())?;
+    file: &mut BufWriter<tokio::fs::File>,
+    key: &ApiKey,
+) -> Result<()> {
+    file.write_all(key.as_str().as_bytes()).await?;
     Ok(())
 }
 

src/validation.rs

@@ -2,8 +2,8 @@ use anyhow::Result;
 use async_stream::stream;
 use futures::{pin_mut, stream::StreamExt};
 use reqwest::Client;
-use std::{fs, time::Instant};
+use std::time::Instant;
-use tokio::sync::mpsc;
+use tokio::{fs, sync::mpsc};
 
 use crate::adapters::write_keys_txt_file;
 use crate::config::KeyCheckerConfig;
@@ -42,20 +42,19 @@ impl ValidationService {
 
         // Create stream to validate keys concurrently
         let valid_keys_stream = stream
-            .map(|key| {
+            .map(|key| validate_key_with_retry(self.client.to_owned(), self.config.api_host(), key))
-                validate_key_with_retry(self.client.to_owned(), self.config.api_host(), key)
-            })
             .buffer_unordered(self.config.concurrency())
             .filter_map(|r| async { r });
         pin_mut!(valid_keys_stream);
 
         // Open output file for writing valid keys
-        let mut output_file = fs::File::create(&self.config.output_path())?;
+        let output_file = fs::File::create(&self.config.output_path()).await?;
+        let mut buffer_writer = tokio::io::BufWriter::new(output_file);
 
         // Process validated keys and write to output file
         while let Some(valid_key) = valid_keys_stream.next().await {
             println!("Valid key found: {}", valid_key.as_str());
-            if let Err(e) = write_keys_txt_file(&mut output_file, &valid_key) {
+            if let Err(e) = write_keys_txt_file(&mut buffer_writer, &valid_key).await {
                 eprintln!("Failed to write key to output file: {}", e);
             }
         }