Use `write_file` util everywhere

Removed creating icon cache dir as it's done on startup

src/api/icons.rs

@@ -1,6 +1,6 @@
 use std::{
     collections::HashMap,
-    fs::{create_dir_all, remove_file, symlink_metadata, File},
+    fs::{remove_file, symlink_metadata, File},
     io::prelude::*,
     net::{IpAddr, ToSocketAddrs},
     sync::{Arc, RwLock},
@@ -14,7 +14,7 @@ use rocket::{http::ContentType, response::Content, Route};
 
 use crate::{
     error::Error,
-    util::{get_reqwest_client_builder, Cached},
+    util::{get_reqwest_client_builder, write_file, Cached},
     CONFIG,
 };
 
@@ -705,13 +705,8 @@ fn download_icon(domain: &str) -> Result<(Vec<u8>, Option<&str>), Error> {
 }
 
 fn save_icon(path: &str, icon: &[u8]) {
-    match File::create(path) {
-        Ok(mut f) => {
-            f.write_all(icon).expect("Error writing icon file");
-        }
-        Err(ref e) if e.kind() == std::io::ErrorKind::NotFound => {
-            create_dir_all(&CONFIG.icon_cache_folder()).expect("Error creating icon cache");
-        }
+    match write_file(path, icon) {
+        Ok(_) => (),
         Err(e) => {
             warn!("Icon save error: {:?}", e);
         }

src/config.rs

@@ -8,7 +8,7 @@ use reqwest::Url;
 use crate::{
     db::DbConnType,
     error::Error,
-    util::{get_env, get_env_bool},
+    util::{get_env, get_env_bool, write_file},
 };
 
 static CONFIG_FILE: Lazy<String> = Lazy::new(|| {
@@ -691,9 +691,7 @@ impl Config {
         }
 
         //Save to file
-        use std::{fs::File, io::Write};
-        let mut file = File::create(&*CONFIG_FILE)?;
-        file.write_all(config_str.as_bytes())?;
+        write_file(&CONFIG_FILE, config_str.as_bytes())?;
 
         Ok(())
     }