Use Mutex instead of RwLock and prevent unneeded allocation on answer check
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0b9283a69b
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db0ad404a1
2 changed files with 39 additions and 24 deletions
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@ -1,58 +1,71 @@
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use std::sync::RwLock;
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use std::{ops::Deref, sync::Mutex};
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struct CaptchaSolutions {
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pub struct CaptchaSolutions {
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last_id: u16,
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solutions: Vec<Option<String>>,
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}
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impl CaptchaSolutions {
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fn get_sol(&self, id: u16) -> &Option<String> {
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fn get(&self, id: u16) -> &Option<String> {
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&self.solutions[id as usize]
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}
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fn set_sol(&mut self, id: u16, sol: Option<String>) {
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fn set(&mut self, id: u16, sol: Option<String>) {
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self.solutions[id as usize] = sol;
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}
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#[must_use = "The new id has to be stored for future verification of an answer!"]
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fn push(&mut self, sol: String) -> u16 {
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self.last_id = self.last_id.wrapping_add(1);
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self.set(self.last_id, Some(sol));
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self.last_id
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}
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}
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pub struct SharedCaptchaSolutions {
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inner: RwLock<CaptchaSolutions>,
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inner: Mutex<CaptchaSolutions>,
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}
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impl Default for SharedCaptchaSolutions {
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fn default() -> Self {
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let max_size = (u16::MAX as usize) + 1;
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let mut solutions = Vec::with_capacity(max_size);
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solutions.resize(max_size, None);
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let max_size = u16::MAX as usize + 1;
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Self {
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inner: RwLock::new(CaptchaSolutions {
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inner: Mutex::new(CaptchaSolutions {
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last_id: 0,
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solutions,
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solutions: vec![None; max_size],
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}),
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}
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}
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}
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impl Deref for SharedCaptchaSolutions {
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type Target = Mutex<CaptchaSolutions>;
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fn deref(&self) -> &Self::Target {
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&self.inner
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}
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}
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impl SharedCaptchaSolutions {
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pub fn store_sol(&self, sol: String) -> u16 {
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let mut captcha_solutions = self.inner.write().unwrap();
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#[must_use = "The new id has to be stored for future verification of an answer!"]
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pub fn store_solution(&self, sol: String) -> u16 {
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let mut sols = self.lock().unwrap();
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let new_id = captcha_solutions.last_id.wrapping_add(1);
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captcha_solutions.last_id = new_id;
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captcha_solutions.set_sol(new_id, Some(sol));
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new_id
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sols.push(sol)
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}
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pub fn check_answer(&self, id: u16, answer: &str) -> bool {
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if *self.inner.read().unwrap().get_sol(id) != Some(answer.trim().to_string()) {
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return false;
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let mut sols = self.lock().unwrap();
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if let Some(sol) = sols.get(id) {
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if sol == answer.trim() {
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sols.set(id, None);
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return true;
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}
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}
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self.inner.write().unwrap().set_sol(id, None);
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true
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false
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}
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}
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@ -43,7 +43,7 @@ pub async fn render_contact_form(params: IndexParams<'_>) -> Result<Response, er
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let solution = captcha.chars_as_string();
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let id = params.captcha_solutions.store_sol(solution);
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let id = params.captcha_solutions.store_solution(solution);
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let template = templates::ContactForm {
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base: templates::Base {
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@ -92,6 +92,7 @@ pub async fn submit(
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) -> Result<Response, errors::AppError> {
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if !captcha_solutions.check_answer(form.id, &form.captcha_answer) {
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info!("Wrong CAPTCHA");
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return failed_submission(
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Arc::clone(&config),
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captcha_solutions,
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@ -105,6 +106,7 @@ pub async fn submit(
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Ok(_) => (),
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Err(e) => {
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error!("{e:?}");
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return failed_submission(
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Arc::clone(&config),
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captcha_solutions,
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