refactor: fix clippy warnings

src/config.rs

@@ -1,6 +1,7 @@
 use std::env;
 
 use std::path::PathBuf;
+use std::str::FromStr;
 use time::ext::NumericalDuration;
 use time::Duration;
 use tokio::fs;
@@ -25,7 +26,7 @@ pub struct NoAuthLimits {
     pub large_file_size: u64,
 }
 
-pub async fn get_config() -> Config {
+pub async fn from_env() -> Config {
     let max_file_size = env::var("UPLOAD_MAX_BYTES")
         .ok()
         .and_then(|variable| variable.parse().ok())
@@ -68,15 +69,15 @@ pub async fn get_config() -> Config {
 fn get_no_auth_limits() -> Option<NoAuthLimits> {
     match (
         env::var("AUTH_PASSWORD").ok(),
-        env_number("NO_AUTH_MAX_TIME"),
-        env_number("NO_AUTH_LARGE_FILE_MAX_TIME"),
+        env_number::<i64>("NO_AUTH_MAX_TIME"),
+        env_number::<i64>("NO_AUTH_LARGE_FILE_MAX_TIME"),
         env_number("NO_AUTH_LARGE_FILE_SIZE"),
     ) {
         (Some(auth_password), Some(max_time), Some(large_file_max_time), Some(large_file_size)) => {
             Some(NoAuthLimits {
                 auth_password,
-                max_time: (max_time as i64).seconds(),
-                large_file_max_time: (large_file_max_time as i64).seconds(),
+                max_time: max_time.seconds(),
+                large_file_max_time: large_file_max_time.seconds(),
                 large_file_size,
             })
         }
@@ -87,6 +88,6 @@ fn get_no_auth_limits() -> Option<NoAuthLimits> {
     }
 }
 
-fn env_number(variable: &str) -> Option<u64> {
-    env::var(variable).ok().and_then(|n| n.parse::<u64>().ok())
+fn env_number<T: FromStr>(variable: &str) -> Option<T> {
+    env::var(variable).ok().and_then(|n| n.parse::<T>().ok())
 }

src/db.rs

@@ -2,7 +2,7 @@ use sqlx::postgres::{PgPool, PgPoolOptions};
 use std::env;
 use time::ext::NumericalStdDuration;
 
-pub async fn setup_db() -> PgPool {
+pub async fn setup() -> PgPool {
     let conn_url = &get_db_url();
     log::info!("Using Connection string {}", conn_url);
 

src/download.rs

@@ -42,8 +42,8 @@ pub async fn download(
 
     let mime = Mime::from_str(&content_type).unwrap_or(APPLICATION_OCTET_STREAM);
     let mut response = match get_view_type(&req, &mime, &path, delete).await {
-        ViewType::Raw => build_file_response(false, &file_name, path, mime, &req).await,
-        ViewType::Download => build_file_response(true, &file_name, path, mime, &req).await,
+        ViewType::Raw => build_file_response(false, &file_name, path, mime, &req),
+        ViewType::Download => build_file_response(true, &file_name, path, mime, &req),
         ViewType::Html => build_text_response(&path).await,
     }?;
 
@@ -141,7 +141,7 @@ async fn build_text_response(path: &Path) -> Result<HttpResponse, Error> {
         .body(html))
 }
 
-async fn build_file_response(
+fn build_file_response(
     download: bool,
     file_name: &str,
     path: PathBuf,
@@ -196,7 +196,7 @@ fn get_disposition_params(filename: &str) -> Vec<DispositionParam> {
             charset: Charset::Ext(String::from("UTF-8")),
             language_tag: None,
             value: filename.to_owned().into_bytes(),
-        }))
+        }));
     }
     parameters
 }
@@ -204,7 +204,8 @@ fn get_disposition_params(filename: &str) -> Vec<DispositionParam> {
 fn insert_cache_headers(response: &mut HttpResponse, valid_till: OffsetDateTime) {
     if response.status().is_success() {
         let valid_duration = valid_till - OffsetDateTime::now_utc();
-        let valid_cache_seconds = valid_duration.whole_seconds().clamp(0, u32::MAX as i64) as u32;
+        let valid_cache_seconds =
+            valid_duration.whole_seconds().clamp(0, i64::from(u32::MAX)) as u32;
         response.headers_mut().insert(
             CACHE_CONTROL,
             CacheControl(vec![

src/main.rs

@@ -37,8 +37,8 @@ async fn not_found() -> Result<HttpResponse, Error> {
 async fn main() -> std::io::Result<()> {
     env_logger::Builder::from_env(Env::default().default_filter_or("info,sqlx=warn")).init();
 
-    let pool: PgPool = db::setup_db().await;
-    let config = config::get_config().await;
+    let pool: PgPool = db::setup().await;
+    let config = config::from_env().await;
     let (sender, receiver) = channel(8);
 
     log::info!("omnomnom");

src/mime_relations.rs

@@ -15,16 +15,16 @@ lazy_static! {
 fn load_mime_aliases() -> HashMap<Mime, Mime> {
     tree_magic_db::aliases()
         .lines()
-        .flat_map(|line| line.split_once(' '))
-        .flat_map(|(alias, mime)| Some((Mime::from_str(alias).ok()?, Mime::from_str(mime).ok()?)))
+        .filter_map(|line| line.split_once(' '))
+        .filter_map(|(alias, mime)| Some((Mime::from_str(alias).ok()?, Mime::from_str(mime).ok()?)))
         .collect()
 }
 
 fn load_mime_parent_relations() -> Vec<(Mime, Mime)> {
     tree_magic_db::subclasses()
         .lines()
-        .flat_map(|line| line.split_once(' '))
-        .flat_map(|(child, parent)| {
+        .filter_map(|line| line.split_once(' '))
+        .filter_map(|(child, parent)| {
             Some((Mime::from_str(child).ok()?, Mime::from_str(parent).ok()?))
         })
         .collect()
@@ -34,11 +34,9 @@ fn load_mime_extensions() -> HashMap<Mime, &'static str> {
     include_str!("../mime.types")
         .lines()
         .filter(|line| !line.is_empty() && !line.starts_with('#'))
-        .map(|line| line.split_whitespace())
-        .flat_map(|mut elements| Some((Mime::from_str(elements.next()?).ok()?, elements.next()?)))
-        .flat_map(|(mime, extension)| {
-            Some((ALIASES.get(&mime).unwrap_or(&mime).clone(), extension))
-        })
+        .map(str::split_whitespace)
+        .filter_map(|mut elements| Some((Mime::from_str(elements.next()?).ok()?, elements.next()?)))
+        .map(|(mime, extension)| (ALIASES.get(&mime).cloned().unwrap_or(mime), extension))
         .collect()
 }
 

src/multipart.rs

@@ -32,16 +32,15 @@ pub(crate) async fn parse_multipart(
     let mut password = None;
     let mut size = 0;
 
-    while let Ok(Some(field)) = payload.try_next().await {
-        let name = get_field_name(&field)?;
-        let name = name.as_str();
-        match name {
+    while let Ok(Some(mut field)) = payload.try_next().await {
+        let name = get_field_name(&field)?.to_owned();
+        match name.as_str() {
             "keep_for" => {
-                keep_for_seconds = Some(parse_string(name, field).await?);
+                keep_for_seconds = Some(parse_string(&name, &mut field).await?);
             }
             "file" => {
                 let (mime, uploaded_name) = get_file_metadata(&field);
-                if uploaded_name == None || uploaded_name.as_deref() == Some("") {
+                if uploaded_name.is_none() || uploaded_name.as_deref() == Some("") {
                     continue;
                 }
                 original_name = uploaded_name;
@@ -62,10 +61,10 @@ pub(crate) async fn parse_multipart(
                 content_type = Some(get_content_type(&first_bytes));
             }
             "delete_on_download" => {
-                delete_on_download = parse_string(name, field).await? != "false";
+                delete_on_download = parse_string(&name, &mut field).await? != "false";
             }
             "password" => {
-                password = Some(parse_string(name, field).await?);
+                password = Some(parse_string(&name, &mut field).await?);
             }
             _ => {}
         };
@@ -77,8 +76,7 @@ pub(crate) async fn parse_multipart(
         .map(|k| k.parse())
         .transpose()
         .map_err(|e| error::ErrorBadRequest(format!("field keep_for is not a number: {e}")))?
-        .map(Duration::seconds)
-        .unwrap_or(DEFAULT_UPLOAD_DURATION);
+        .map_or(DEFAULT_UPLOAD_DURATION, Duration::seconds);
     let valid_till = OffsetDateTime::now_utc() + keep_for;
 
     let upload_config = UploadConfig {
@@ -88,7 +86,7 @@ pub(crate) async fn parse_multipart(
         delete_on_download,
     };
 
-    check_requirements(&upload_config, size, password, &keep_for, config)?;
+    check_requirements(&upload_config, size, &password, &keep_for, config)?;
 
     Ok(upload_config)
 }
@@ -96,7 +94,7 @@ pub(crate) async fn parse_multipart(
 fn check_requirements(
     upload_config: &UploadConfig,
     size: u64,
-    password: Option<String>,
+    password: &Option<String>,
     keep_for: &Duration,
     config: &config::Config,
 ) -> Result<(), error::Error> {
@@ -127,21 +125,23 @@ fn check_requirements(
     Ok(())
 }
 
-fn get_field_name(field: &Field) -> Result<String, error::Error> {
+fn get_field_name(field: &Field) -> Result<&str, error::Error> {
     Ok(field
         .content_disposition()
         .get_name()
-        .map(|s| s.to_owned())
         .ok_or(error::ParseError::Incomplete)?)
 }
 
-async fn parse_string(name: &str, field: actix_multipart::Field) -> Result<String, error::Error> {
+async fn parse_string(
+    name: &str,
+    field: &mut actix_multipart::Field,
+) -> Result<String, error::Error> {
     let data = read_content(field).await?;
     String::from_utf8(data)
         .map_err(|_| error::ErrorBadRequest(format!("could not parse field {name} as utf-8")))
 }
 
-async fn read_content(mut field: actix_multipart::Field) -> Result<Vec<u8>, error::Error> {
+async fn read_content(field: &mut actix_multipart::Field) -> Result<Vec<u8>, error::Error> {
     let mut data = Vec::new();
     while let Some(chunk) = field.try_next().await.map_err(error::ErrorBadRequest)? {
         data.extend(chunk);

src/template.rs

@@ -52,7 +52,7 @@ fn build_index_html(config: &Config) -> String {
             .replace("{max_size_snippet}", MAX_SIZE_SNIPPET_HTML.trim_end())
             .replace("{max_size}", &render_file_size(max_file_size));
     } else {
-        html = html.replace("{max_size_snippet}", "")
+        html = html.replace("{max_size_snippet}", "");
     };
     html
 }