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12
src/main.rs
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12
src/main.rs
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mod routes;
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mod states;
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use rocket_dyn_templates::Template;
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#[rocket::launch]
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fn rocket() -> _ {
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rocket::build()
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.mount("/", rocket::routes![routes::index, routes::submit])
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.manage(states::SharedCaptchaSolutions::new())
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.attach(Template::fairing())
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}
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56
src/routes.rs
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56
src/routes.rs
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use rocket::form::{Form, FromForm, Strict};
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use rocket::response::status::BadRequest;
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use rocket::{get, post, State};
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use rocket_dyn_templates::Template;
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use serde::Serialize;
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use crate::states;
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#[derive(Serialize)]
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struct FormContext {
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id: u16,
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captcha: String,
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}
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#[get("/")]
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pub fn index(
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captcha_solutions: &State<states::SharedCaptchaSolutions>,
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) -> Result<Template, BadRequest<()>> {
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let captcha = captcha::by_name(captcha::Difficulty::Easy, captcha::CaptchaName::Lucy);
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let captcha_base64 = match captcha.as_base64() {
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Some(s) => s,
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None => return Err(BadRequest(None)),
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};
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let id = captcha_solutions.store_solution(&captcha.chars_as_string());
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let form_context = FormContext {
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id,
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captcha: captcha_base64,
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};
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Ok(Template::render("form", &form_context))
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}
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#[derive(FromForm)]
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pub struct ContactForm {
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id: u16,
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name: String,
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email: String,
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telefon: String,
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message: String,
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captcha_answer: String,
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}
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#[post("/submit", data = "<form>")]
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pub fn submit(
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form: Form<Strict<ContactForm>>,
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captcha_solutions: &State<states::SharedCaptchaSolutions>,
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) -> Result<String, BadRequest<String>> {
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println!(
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"{}",
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captcha_solutions.check_answer(form.id, &form.captcha_answer)
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);
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Ok("Ihre Anfrage wurde übermittelt. Wir melden uns bald bei Ihnen zurück.".to_string())
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}
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49
src/states.rs
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49
src/states.rs
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use std::sync::{Arc, Mutex};
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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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pub struct SharedCaptchaSolutions {
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arc: Arc<Mutex<CaptchaSolutions>>,
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}
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impl SharedCaptchaSolutions {
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pub fn new() -> 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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Self {
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arc: Arc::new(Mutex::new(CaptchaSolutions {
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last_id: 0,
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solutions,
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})),
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}
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}
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pub fn store_solution(&self, solution: &str) -> u16 {
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let mut captcha_solutions = self.arc.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.solutions[new_id as usize] = Some(solution.to_string());
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new_id
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}
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pub fn check_answer(&self, id: u16, answer: &str) -> bool {
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let mut captcha_solutions = self.arc.lock().unwrap();
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let id = id as usize;
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if captcha_solutions.solutions[id] == Some(answer.trim().to_string()) {
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captcha_solutions.solutions[id] = None;
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return true;
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}
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false
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}
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}
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40
templates/form.html.tera
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40
templates/form.html.tera
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>Contact form</title>
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</head>
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<body>
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<h2>Kontakt-Formular</h2>
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<form action="/submit" method="post">
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<input type="hidden" name="id" value="{{ id }}" required>
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<div class="mb-3">
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<label for="name" class="form-label">Name</label>
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<input type="text" name="name" class="form-control" id="exampleInputEmail1" required>
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</div>
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<div class="mb-3">
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<label for="email" class="form-label">E-Mail</label>
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<input type="email" name="email" class="form-control" id="email" required>
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</div>
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<div class="mb-3">
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<label for="telefon" class="form-label">Telefon</label>
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<input type="number" name="telefon" class="form-control" id="telefon">
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</div>
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<div class="mb-3">
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<label for="message" class="form-label">Nachricht</label>
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<input type="text" name="message" class="form-control" id="message" required>
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</div>
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<div class="mb-3">
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<label for="captcha_answer" class="form-label">Code vom Bild daneben eingeben</label>
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<input type="text" name="captcha_answer" class="form-control" id="captcha_answer" required>
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</div>
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<button type="submit" class="btn btn-primary">Abschicken</button>
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</form>
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<img src="data:image/png;base64,{{ captcha }}">
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</body>
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</html>
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