.forgejo/workflows/ci.yml

@@ -1,25 +0,0 @@
-name: Rust CI
-
-on:
-  push:
-    branches: [master]
-  pull_request:
-    branches: [master]
-
-jobs:
-  rust_ci:
-    name: Rust CI
-    runs-on: debian
-    steps:
-      - uses: actions/checkout@v4
-      - uses: https://codeberg.org/TheAwiteb/rust-action@v1.75
-      - name: Check MSRV
-        run: cargo +1.75 build
-      - name: Build the source code
-        run: cargo build
-      - name: Check the code format
-        run: cargo fmt -- --check
-      - name: Run cargo-check
-        run: cargo check
-      - name: Run cargo-clippy
-        run: cargo clippy -- -D warnings

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: "TheAwiteb"

.github/workflows/auto_close_pr.yml

@@ -1,34 +0,0 @@
-name: Auto close PR
-
-on:
-  pull_request:
-    types: [opened, reopened]
-
-jobs:
-  close_pr:
-    name: Auto close PR
-    runs-on: ubuntu-latest
-    steps:
-      - name: Send close comment
-        run: |
-          curl -L \
-          -X POST \
-          -H "Accept: application/vnd.github+json" \
-          -H "Authorization: Bearer $PAT" \
-          -H "X-GitHub-Api-Version: 2022-11-28" \
-          https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.number }}/comments \
-          -d '{"body":"${{ env.BODY }}"}'
-        env:
-          PAT: ${{ secrets.PAT }}
-          BODY: This repository is mirror only and you cannot create a pull request for it. Please open your PR in https://git.4rs.nl/awiteb/salvo-captcha
-      - name: Close the PR
-        run: |
-          curl -L \
-          -X PATCH \
-          -H "Accept: application/vnd.github+json" \
-          -H "Authorization: Bearer $PAT" \
-          -H "X-GitHub-Api-Version: 2022-11-28" \
-          https://api.github.com/repos/${{ github.repository }}/pulls/${{ github.event.number }} \
-          -d '{"state":"closed"}'
-        env:
-          PAT: ${{ secrets.PAT }}

.github/workflows/cd.yml

@@ -0,0 +1,35 @@
+name: CD
+
+on:
+  push:
+    tags:
+      - v[0-9]+.[0-9]+.[0-9]+
+
+jobs:
+  release:
+    if: startsWith(github.ref, 'refs/tags/')
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Build Changelog 🏗
+        id: changelog
+        uses: mikepenz/release-changelog-builder-action@v4.0.0
+        with:
+          configuration: "./.github/config/changelog-builder-action.json"
+        env:
+          GITHUB_TOKEN: ${{ secrets.PAT }}
+
+      - name: Create Release 🖋
+        uses: softprops/action-gh-release@v1
+        with:
+          prerelease: ${{ contains(github.ref, 'rc') || contains(github.ref, 'pre') }}
+          body: ${{steps.changelog.outputs.changelog}}
+        env:
+          GITHUB_TOKEN: ${{ secrets.PAT }}
+
+      - name: Publish to crates.io 🚀
+        uses: katyo/publish-crates@v2
+        with:
+          token: ${{ secrets.PAT }}
+          registry-token: ${{ secrets.CARGO_REGISTRY_TOKEN }}

.github/workflows/ci.yml

@@ -0,0 +1,44 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  build:
+    name: Rust build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@stable
+      - run: cargo build --workspace --all-features --all-targets
+  rustfmt:
+    name: Rust format
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@stable
+      - run: cargo fmt -- --check
+  check:
+    name: Rust check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@stable
+      - run: cargo check --workspace --all-features --all-targets
+  clippy:
+    name: Rust clippy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@stable
+      - run: cargo clippy --workspace --all-features -- -D warnings
+  test:
+    name: Rust test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@stable
+      - run: cargo test --workspace --all-features

Cargo.toml

@@ -14,21 +14,19 @@ categories = ["web-programming", "network-programming"]
 
 
 [dependencies]
-cacache = { version = "13", default-features = false, features = ["tokio-runtime", "mmap"], optional = true }
+async-trait = "0.1.77"
+cacache = { version = "12.0.0", default-features = false, features = ["tokio-runtime", "mmap"], optional = true }
 captcha = { version = "0.0.9", default-features = false }
-log = "0.4"
+easy-ext = "1.0.1"
-salvo_core = { version = ">= 0.65, < 0.69", default-features = false }
+log = "0.4.20"
-uuid = { version = "1.7", features = ["v4"], optional = true }
+salvo_core = "^ 0.65"
+uuid = { version = "1.7.0", features = ["v4"], optional = true }
 
 [features]
 cacache-storage = ["dep:cacache", "dep:uuid"]
 
 [dev-dependencies]
-tempfile = "3.9"
+tempfile = ">= 3.9"
-tokio = { version = "1.35", features = ["macros", "rt-multi-thread"] }
+tokio = { version = ">= 1.35", features = ["macros", "rt-multi-thread"] }
-base64 = "0.21"
+base64 = ">= 0.21"
-salvo = { version = ">= 0.65, < 0.69", default-features = false, features = ["server", "http1","http2", "affix"] }
+salvo = { version = ">= 0.65", features = ["affix"] }
-
-[[example]]
-name = "simple_login"
-required-features = ["cacache-storage"]

README.md

@@ -8,8 +8,7 @@ A captcha middleware for [salvo](salvo.rs) framework. It uses [`captcha`](https:
 
 </div>
 
-## Add to your project
+### Add to your project
-
 First, add the following to your `Cargo.toml`:
 
 ```toml
@@ -23,41 +22,36 @@ Or use [cargo-add](https://doc.rust-lang.org/cargo/commands/cargo-add.html) to a
 $ cargo add salvo-captcha
 ```
 
-## Usage
+### Usage
-
 See the [examples](examples) directory for a complete example.
 
-## Storage
 
-The storage of the captcha is handled by a [`CaptchaStore`] trait. You can implement your own storage or use the [`cacache-rs`] by enabling the `cacache-storage` feature.
+### Storage
+The storage of the captcha is handled by a [`CaptchaStore`] trait. You can implement your own storage or use the `cacache-rs` by enabling the `cacache-storage` feature.
 
 ```toml
 [dependencies]
 salvo-captcha = { version = "0.1", features = ["cacache-storage"] }
 ```
 
-## Captcha name and difficulty
+### Captcha name and difficulty
+In this table you can see the different between the difficulties and the name of the captcha.
 
-In this table, you can see the difference between the difficulties and the name of the captcha.
+| Name | Difficulty | Image |
-
+|------|------------|-------|
-|  Name  |                 Easy                 |                Medium                |                 Hard                 |
+| `Amelia` | Easy | ![Simple](https://i.suar.me/1JaxG/s) |
-| :----: | :----------------------------------: | :----------------------------------: | :----------------------------------: |
+| `Amelia` | Medium | ![Simple](https://i.suar.me/l7zBl/s) |
-| Amelia | ![Simple](https://i.suar.me/1JaxG/s) | ![Simple](https://i.suar.me/l7zBl/s) | ![Simple](https://i.suar.me/qXAlx/s) |
+| `Amelia` | Hard | ![Simple](https://i.suar.me/qXAlx/s) |
-|  Lucy  | ![Simple](https://i.suar.me/edwBG/s) | ![Simple](https://i.suar.me/NJmg0/s) | ![Simple](https://i.suar.me/OJK7M/s) |
+| `Lucy` | Easy | ![Simple](https://i.suar.me/edwBG/s) |
-|  Mila  | ![Simple](https://i.suar.me/dO78z/s) | ![Simple](https://i.suar.me/PXBwK/s) | ![Simple](https://i.suar.me/8edgE/s) |
+| `Lucy` | Medium | ![Simple](https://i.suar.me/NJmg0/s) |
-
+| `Lucy` | Hard | ![Simple](https://i.suar.me/OJK7M/s) |
-## Mirrors
+| `Mila` | Easy | ![Simple](https://i.suar.me/dO78z/s) |
-
+| `Mila` | Medium | ![Simple](https://i.suar.me/PXBwK/s) |
-- Github (https://github.com/TheAwiteb/salvo-captcha)
+| `Mila` | Hard | ![Simple](https://i.suar.me/8edgE/s) |
-- Codeberg (https://codeberg.org/awiteb/salvo-captcha)
-
-### Main Repository
-
-- My Git (https://git.4rs.nl/awiteb/salvo-captcha)
-
-## License
 
+### License
 This project is licensed under the MIT license for more details see [LICENSE](LICENSE) or http://opensource.org/licenses/MIT.
 
+
 [`CaptchaStore`]: https://docs.rs/salvo_captcha/0.1.0/salvo_captcha/trait.CaptchaStore.html
-[`cacache-rs`]: https://github.com/zkat/cacache-rs
+[cacache-rs]: https://github.com/zkat/cacache-rs

examples/simple_login.rs

@@ -3,6 +3,15 @@
 // You can see a video of this example here:
 //
 // Run the example with `cargo run --example simple_login --features cacache-storage`
+//
+// Or set up a crate for it, with the following `Cargo.toml`:
+// ```toml
+// [dependencies]
+// base64 = ">= 0.21"
+// salvo = { version = ">= 0.65", features = ["affix"] }
+// salvo-captcha = { version = ">= 0.1", features = ["cacache-storage"] }
+// tokio = { version = ">= 1.35", features = ["macros", "rt-multi-thread", "time"] }
+// ```
 
 use std::{sync::Arc, time::Duration};
 
@@ -10,6 +19,9 @@ use base64::{engine::GeneralPurpose, Engine};
 use salvo::prelude::*;
 use salvo_captcha::*;
 
+// The type of the captcha
+type MyCaptcha = Captcha<CacacheStorage, CaptchaFormFinder<String, String>>;
+
 // To convert the image to base64, to show it in the browser
 const BASE_64_ENGINE: GeneralPurpose = GeneralPurpose::new(
     &base64::alphabet::STANDARD,
@@ -17,7 +29,7 @@ const BASE_64_ENGINE: GeneralPurpose = GeneralPurpose::new(
 );
 
 #[handler]
-async fn index(res: &mut Response, depot: &mut Depot) {
+async fn index(_req: &mut Request, res: &mut Response, depot: &mut Depot) {
     // Get the captcha from the depot
     let captcha_storage = depot.obtain::<Arc<CacacheStorage>>().unwrap();
 
@@ -39,7 +51,7 @@ async fn index(res: &mut Response, depot: &mut Depot) {
 #[handler]
 async fn auth(req: &mut Request, res: &mut Response, depot: &mut Depot) {
     // Get the captcha state from the depot, where we can know if the captcha is passed
-    let captcha_state = depot.get_captcha_state();
+    let captcha_state = depot.get_captcha_state().unwrap();
     // Not important, just for demo
     let Some(username) = req.form::<String>("username").await else {
         res.status_code(StatusCode::BAD_REQUEST);
@@ -64,7 +76,7 @@ async fn auth(req: &mut Request, res: &mut Response, depot: &mut Depot) {
 
 #[tokio::main]
 async fn main() {
-    let captcha_middleware = Captcha::new(
+    let captcha_middleware = MyCaptcha::new(
         CacacheStorage::new("./captcha-cache"),
         CaptchaFormFinder::new(),
     )
@@ -103,7 +115,6 @@ async fn main() {
         );
 
     let acceptor = TcpListener::new(("127.0.0.1", 5800)).bind().await;
-    println!("Starting server on http://127.0.0.1:5800");
     Server::new(acceptor).serve(router).await;
     captcha_cleaner.await.ok();
 }

src/captcha_gen.rs

@@ -1,14 +1,3 @@
-// Copyright (c) 2024, Awiteb <a@4rs.nl>
-//     A captcha middleware for Salvo framework.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
 use crate::{CaptchaDifficulty, CaptchaName, CaptchaStorage};
 
 /// Captcha generator, used to generate a new captcha image. This trait are implemented for all [`CaptchaStorage`].
@@ -22,7 +11,7 @@ pub trait CaptchaGenerator: CaptchaStorage {
         &self,
         name: CaptchaName,
         difficulty: CaptchaDifficulty,
-    ) -> impl std::future::Future<Output = Result<Option<(String, Vec<u8>)>, Self::Error>> + Send
+    ) -> impl std::future::Future<Output = Result<Option<(Self::Token, Vec<u8>)>, Self::Error>> + Send
     {
         async {
             let Some((captcha_answer, captcha_image)) =
@@ -31,7 +20,7 @@ pub trait CaptchaGenerator: CaptchaStorage {
                 return Ok(None);
             };
 
-            let token = self.store_answer(captcha_answer).await?;
+            let token = self.store_answer(captcha_answer.into()).await?;
             Ok(Some((token, captcha_image)))
         }
     }

src/finder.rs

@@ -9,37 +9,49 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 
+use std::marker::PhantomData;
+
 use salvo_core::http::header::HeaderName;
 use salvo_core::http::Request;
 
 /// Trait to find the captcha token and answer from the request.
 pub trait CaptchaFinder: Send + Sync {
+    /// The token type
+    type Token: TryFrom<String> + Sync + Send;
+    /// The answer type
+    type Answer: TryFrom<String> + Sync + Send;
+
+    /// The token error type
+    type TError: std::fmt::Debug + Send;
+    /// The answer error type
+    type AError: std::fmt::Debug + Send;
+
     /// Find the captcha token from the request.
     ///
-    /// ### Returns
+    /// Return [`None`] if the request does not contain a captcha token. An error is returned if the token is invalid format.
-    /// - None: If the token is not found
-    /// - Some(None): If the token is found but is invalid (e.g. not a valid string)
-    /// - Some(Some(token)): If the token is found
     fn find_token(
         &self,
         req: &mut Request,
-    ) -> impl std::future::Future<Output = Option<Option<String>>> + std::marker::Send;
+    ) -> impl std::future::Future<Output = Result<Option<Self::Token>, Self::TError>> + std::marker::Send;
 
     /// Find the captcha answer from the request.
     ///
-    /// ### Returns
+    /// Return [`None`] if the request does not contain a captcha answer. An error is returned if the answer is invalid format.
-    /// - None: If the answer is not found
-    /// - Some(None): If the answer is found but is invalid (e.g. not a valid string)
-    /// - Some(Some(answer)): If the answer is found
     fn find_answer(
         &self,
         req: &mut Request,
-    ) -> impl std::future::Future<Output = Option<Option<String>>> + std::marker::Send;
+    ) -> impl std::future::Future<Output = Result<Option<Self::Answer>, Self::AError>> + std::marker::Send;
 }
 
 /// Find the captcha token and answer from the header
 #[derive(Debug)]
-pub struct CaptchaHeaderFinder {
+pub struct CaptchaHeaderFinder<T, A>
+where
+    T: TryFrom<String> + Sync + Send,
+    A: TryFrom<String> + Sync + Send,
+{
+    phantom: PhantomData<(T, A)>,
+
     /// The header name of the captcha token
     ///
     /// Default: "x-captcha-token"
@@ -53,7 +65,13 @@ pub struct CaptchaHeaderFinder {
 
 /// Find the captcha token and answer from the form
 #[derive(Debug)]
-pub struct CaptchaFormFinder {
+pub struct CaptchaFormFinder<T, A>
+where
+    T: TryFrom<String> + Sync + Send,
+    A: TryFrom<String> + Sync + Send,
+{
+    phantom: PhantomData<(T, A)>,
+
     /// The form name of the captcha token
     ///
     /// Default: "captcha_token"
@@ -65,7 +83,11 @@ pub struct CaptchaFormFinder {
     pub answer_name: String,
 }
 
-impl CaptchaHeaderFinder {
+impl<T, A> CaptchaHeaderFinder<T, A>
+where
+    T: TryFrom<String> + Sync + Send,
+    A: TryFrom<String> + Sync + Send,
+{
     /// Create a new CaptchaHeaderFinder
     pub fn new() -> Self {
         Self::default()
@@ -84,7 +106,11 @@ impl CaptchaHeaderFinder {
     }
 }
 
-impl CaptchaFormFinder {
+impl<T, A> CaptchaFormFinder<T, A>
+where
+    T: TryFrom<String> + Sync + Send,
+    A: TryFrom<String> + Sync + Send,
+{
     /// Create a new CaptchaFormFinder
     pub fn new() -> Self {
         Self::default()
@@ -103,57 +129,99 @@ impl CaptchaFormFinder {
     }
 }
 
-impl Default for CaptchaHeaderFinder {
+impl<T, A> Default for CaptchaHeaderFinder<T, A>
+where
+    T: TryFrom<String> + Sync + Send,
+    A: TryFrom<String> + Sync + Send,
+{
     /// Create a default CaptchaHeaderFinder with:
     /// - token_header: "x-captcha-token"
     /// - answer_header: "x-captcha-answer"
     fn default() -> Self {
         Self {
+            phantom: PhantomData,
             token_header: HeaderName::from_static("x-captcha-token"),
             answer_header: HeaderName::from_static("x-captcha-answer"),
         }
     }
 }
 
-impl Default for CaptchaFormFinder {
+impl<T, A> Default for CaptchaFormFinder<T, A>
+where
+    T: TryFrom<String> + Sync + Send,
+    A: TryFrom<String> + Sync + Send,
+{
     /// Create a default CaptchaFormFinder with:
     /// - token_name: "captcha_token"
     /// - answer_name: "captcha_answer"
     fn default() -> Self {
         Self {
+            phantom: PhantomData,
             token_name: "captcha_token".to_string(),
             answer_name: "captcha_answer".to_string(),
         }
     }
 }
 
-impl CaptchaFinder for CaptchaHeaderFinder {
+impl<T, A> CaptchaFinder for CaptchaHeaderFinder<T, A>
-    async fn find_token(&self, req: &mut Request) -> Option<Option<String>> {
+where
+    T: TryFrom<String> + Sync + Send,
+    A: TryFrom<String> + Sync + Send,
+    <T as TryFrom<String>>::Error: Send,
+    <T as TryFrom<String>>::Error: std::fmt::Debug,
+    <A as TryFrom<String>>::Error: Send,
+    <A as TryFrom<String>>::Error: std::fmt::Debug,
+{
+    type Token = T;
+    type Answer = A;
+
+    type TError = <T as TryFrom<String>>::Error;
+    type AError = <A as TryFrom<String>>::Error;
+
+    async fn find_token(&self, req: &mut Request) -> Result<Option<Self::Token>, Self::TError> {
         req.headers()
             .get(&self.token_header)
-            .map(|t| t.to_str().map(ToString::to_string).ok())
+            .and_then(|t| t.to_str().ok())
+            .map(|t| Self::Token::try_from(t.to_string()))
+            .transpose()
     }
 
-    async fn find_answer(&self, req: &mut Request) -> Option<Option<String>> {
+    async fn find_answer(&self, req: &mut Request) -> Result<Option<Self::Answer>, Self::AError> {
         req.headers()
             .get(&self.answer_header)
-            .map(|a| a.to_str().map(ToString::to_string).ok())
+            .and_then(|a| a.to_str().ok())
+            .map(|a| Self::Answer::try_from(a.to_string()))
+            .transpose()
     }
 }
 
-impl CaptchaFinder for CaptchaFormFinder {
+impl<T, A> CaptchaFinder for CaptchaFormFinder<T, A>
-    async fn find_token(&self, req: &mut Request) -> Option<Option<String>> {
+where
-        req.form_data()
+    T: TryFrom<String> + Sync + Send,
+    A: TryFrom<String> + Sync + Send,
+    <T as TryFrom<String>>::Error: Send,
+    <T as TryFrom<String>>::Error: std::fmt::Debug,
+    <A as TryFrom<String>>::Error: Send,
+    <A as TryFrom<String>>::Error: std::fmt::Debug,
+{
+    type Token = T;
+    type Answer = A;
+
+    type TError = <T as TryFrom<String>>::Error;
+    type AError = <A as TryFrom<String>>::Error;
+
+    async fn find_token(&self, req: &mut Request) -> Result<Option<Self::Token>, Self::TError> {
+        req.form::<String>(&self.token_name)
             .await
-            .map(|form| form.fields.get(&self.token_name).cloned())
+            .map(|t| Self::Token::try_from(t.to_string()))
-            .ok()
+            .transpose()
     }
 
-    async fn find_answer(&self, req: &mut Request) -> Option<Option<String>> {
+    async fn find_answer(&self, req: &mut Request) -> Result<Option<Self::Answer>, Self::AError> {
-        req.form_data()
+        req.form::<String>(&self.answer_name)
             .await
-            .map(|form| form.fields.get(&self.answer_name).cloned())
+            .map(|a| Self::Answer::try_from(a.to_string()))
-            .ok()
+            .transpose()
     }
 }
 
@@ -166,129 +234,77 @@ mod tests {
 
     #[tokio::test]
     async fn test_captcha_header_finder() {
-        let finder = CaptchaHeaderFinder::new();
+        let finder = CaptchaHeaderFinder::<String, String>::new();
         let mut req = Request::default();
         let headers = req.headers_mut();
-
+        let token = uuid::Uuid::new_v4();
         headers.insert(
             HeaderName::from_static("x-captcha-token"),
-            HeaderValue::from_str("token").unwrap(),
+            HeaderValue::from_str(&token.to_string()).unwrap(),
         );
         headers.insert(
             HeaderName::from_static("x-captcha-answer"),
             HeaderValue::from_static("answer"),
         );
-
         assert_eq!(
             finder.find_token(&mut req).await,
-            Some(Some("token".to_owned()))
+            Ok(Some(token.to_string()))
         );
-        assert_eq!(
+        assert!(matches!(
             finder.find_answer(&mut req).await,
-            Some(Some("answer".to_owned()))
+            Ok(Some(a)) if a == *"answer"
-        );
+        ));
     }
 
     #[tokio::test]
     async fn test_captcha_header_finder_customized() {
-        let finder = CaptchaHeaderFinder::new()
+        let finder = CaptchaHeaderFinder::<String, String>::new()
             .token_header(HeaderName::from_static("token"))
             .answer_header(HeaderName::from_static("answer"));
-
         let mut req = Request::default();
         let headers = req.headers_mut();
-
+        let token = uuid::Uuid::new_v4();
         headers.insert(
             HeaderName::from_static("token"),
-            HeaderValue::from_str("token").unwrap(),
+            HeaderValue::from_str(&token.to_string()).unwrap(),
         );
         headers.insert(
             HeaderName::from_static("answer"),
             HeaderValue::from_static("answer"),
         );
-
         assert_eq!(
             finder.find_token(&mut req).await,
-            Some(Some("token".to_owned()))
+            Ok(Some(token.to_string()))
         );
-        assert_eq!(
+        assert!(matches!(
             finder.find_answer(&mut req).await,
-            Some(Some("answer".to_owned()))
+            Ok(Some(a)) if a == *"answer"
-        );
+        ));
     }
 
     #[tokio::test]
     async fn test_captcha_header_finder_none() {
-        let finder = CaptchaHeaderFinder::new();
+        let finder = CaptchaHeaderFinder::<String, String>::new();
         let mut req = Request::default();
 
-        assert_eq!(finder.find_token(&mut req).await, Some(None));
+        assert_eq!(finder.find_token(&mut req).await, Ok(None));
-        assert_eq!(finder.find_answer(&mut req).await, Some(None));
+        assert_eq!(finder.find_answer(&mut req).await, Ok(None));
     }
 
     #[tokio::test]
     async fn test_captcha_header_finder_customized_none() {
-        let finder = CaptchaHeaderFinder::new()
+        let finder = CaptchaHeaderFinder::<String, String>::new()
             .token_header(HeaderName::from_static("token"))
             .answer_header(HeaderName::from_static("answer"));
         let mut req = Request::default();
-        let headers = req.headers_mut();
 
-        headers.insert(
+        assert_eq!(finder.find_token(&mut req).await, Ok(None));
-            HeaderName::from_static("token"),
+        assert_eq!(finder.find_answer(&mut req).await, Ok(None));
-            HeaderValue::from_str("token").unwrap(),
-        );
-        headers.insert(
-            HeaderName::from_static("answer"),
-            HeaderValue::from_static("answer"),
-        );
-
-        assert_eq!(
-            finder.find_token(&mut req).await,
-            Some(Some("token".to_owned()))
-        );
-        assert_eq!(
-            finder.find_answer(&mut req).await,
-            Some(Some("answer".to_owned()))
-        );
-
-        assert_eq!(finder.find_token(&mut req).await, Some(None));
-        assert_eq!(finder.find_answer(&mut req).await, Some(None));
-    }
-
-    #[tokio::test]
-    async fn test_captcha_header_finder_invalid_string() {
-        let finder = CaptchaHeaderFinder::new()
-            .token_header(HeaderName::from_static("token"))
-            .answer_header(HeaderName::from_static("answer"));
-        let mut req = Request::default();
-        let headers = req.headers_mut();
-
-        headers.insert(
-            HeaderName::from_static("token"),
-            HeaderValue::from_str("مرحبا").unwrap(),
-        );
-        headers.insert(
-            HeaderName::from_static("answer"),
-            HeaderValue::from_static("مرحبا"),
-        );
-
-        assert_eq!(
-            finder.find_token(&mut req).await,
-            Some(Some("token".to_owned()))
-        );
-        assert_eq!(
-            finder.find_answer(&mut req).await,
-            Some(Some("answer".to_owned()))
-        );
-
-        assert_eq!(finder.find_token(&mut req).await, None);
-        assert_eq!(finder.find_answer(&mut req).await, None);
     }
 
     #[tokio::test]
     async fn test_captcha_form_finder() {
-        let finder = CaptchaFormFinder::new();
+        let finder = CaptchaFormFinder::<String, String>::new();
         let mut req = Request::default();
         *req.body_mut() = ReqBody::Once("captcha_token=token&captcha_answer=answer".into());
         let headers = req.headers_mut();
@@ -299,17 +315,17 @@ mod tests {
 
         assert_eq!(
             finder.find_token(&mut req).await,
-            Some(Some("token".to_owned()))
+            Ok(Some("token".to_string()))
         );
-        assert_eq!(
+        assert!(matches!(
             finder.find_answer(&mut req).await,
-            Some(Some("answer".to_owned()))
+            Ok(Some(a)) if a == *"answer"
-        );
+        ));
     }
 
     #[tokio::test]
     async fn test_captcha_form_finder_customized() {
-        let finder = CaptchaFormFinder::new()
+        let finder = CaptchaFormFinder::<String, String>::new()
             .token_name("token".to_string())
             .answer_name("answer".to_string());
         let mut req = Request::default();
@@ -322,17 +338,17 @@ mod tests {
 
         assert_eq!(
             finder.find_token(&mut req).await,
-            Some(Some("token".to_owned()))
+            Ok(Some("token".to_string()))
         );
-        assert_eq!(
+        assert!(matches!(
             finder.find_answer(&mut req).await,
-            Some(Some("answer".to_owned()))
+            Ok(Some(a)) if a == *"answer"
-        );
+        ));
     }
 
     #[tokio::test]
     async fn test_captcha_form_finder_none() {
-        let finder = CaptchaFormFinder::new();
+        let finder = CaptchaFormFinder::<String, String>::new();
         let mut req = Request::default();
         *req.body_mut() = ReqBody::Once("".into());
         let headers = req.headers_mut();
@@ -341,13 +357,13 @@ mod tests {
             HeaderValue::from_str(&ContentType::form_url_encoded().to_string()).unwrap(),
         );
 
-        assert_eq!(finder.find_token(&mut req).await, Some(None));
+        assert_eq!(finder.find_token(&mut req).await, Ok(None));
-        assert_eq!(finder.find_answer(&mut req).await, Some(None));
+        assert_eq!(finder.find_answer(&mut req).await, Ok(None));
     }
 
     #[tokio::test]
     async fn test_captcha_form_finder_customized_none() {
-        let finder = CaptchaFormFinder::new()
+        let finder = CaptchaFormFinder::<String, String>::new()
             .token_name("token".to_string())
             .answer_name("answer".to_string());
         let mut req = Request::default();
@@ -358,13 +374,13 @@ mod tests {
             HeaderValue::from_str(&ContentType::form_url_encoded().to_string()).unwrap(),
         );
 
-        assert_eq!(finder.find_token(&mut req).await, Some(None));
+        assert_eq!(finder.find_token(&mut req).await, Ok(None));
-        assert_eq!(finder.find_answer(&mut req).await, Some(None));
+        assert_eq!(finder.find_answer(&mut req).await, Ok(None));
     }
 
     #[tokio::test]
     async fn test_captcha_form_finder_invalid() {
-        let finder = CaptchaFormFinder::new();
+        let finder = CaptchaFormFinder::<String, String>::new();
         let mut req = Request::default();
         *req.body_mut() = ReqBody::Once("captcha_token=token&captcha_answer=answer".into());
         let headers = req.headers_mut();
@@ -373,7 +389,7 @@ mod tests {
             HeaderValue::from_str(&ContentType::json().to_string()).unwrap(),
         );
 
-        assert_eq!(finder.find_token(&mut req).await, Some(None));
+        assert_eq!(finder.find_token(&mut req).await, Ok(None));
-        assert_eq!(finder.find_answer(&mut req).await, Some(None));
+        assert_eq!(finder.find_answer(&mut req).await, Ok(None));
     }
 }

src/lib.rs

@@ -36,7 +36,7 @@ pub const CAPTCHA_STATE_KEY: &str = "::salvo_captcha::captcha_state";
 pub struct Captcha<S, F>
 where
     S: CaptchaStorage,
-    F: CaptchaFinder,
+    F: CaptchaFinder<Token = S::Token, Answer = S::Answer>,
 {
     /// The captcha finder, used to find the captcha token and answer from the request.
     finder: F,
@@ -47,20 +47,20 @@ where
 }
 
 /// The captcha states of the request
-#[derive(Default, Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum CaptchaState {
-    /// The captcha check is skipped. This depends on the skipper.
-    #[default]
-    Skipped,
     /// The captcha is checked and passed. If the captcha is passed, it will be cleared from the storage.
     Passed,
+    /// The captcha check is skipped. This depends on the skipper.
+    Skipped,
     /// Can't find the captcha token in the request
     TokenNotFound,
     /// Can't find the captcha answer in the request
     AnswerNotFound,
-    /// Can't find the captcha token in the storage or the token is wrong (not valid string)
+    /// The captcha token is wrong, can't find the captcha in the storage.
+    /// Maybe the captcha token entered by the user is wrong, or the captcha is expired, because the storage has been cleared.
     WrongToken,
-    /// Can't find the captcha answer in the storage or the answer is wrong (not valid string)
+    /// The captcha answer is wrong. This will not clear the captcha from the storage.
     WrongAnswer,
     /// Storage error
     StorageError,
@@ -69,13 +69,13 @@ pub enum CaptchaState {
 impl<S, F> Captcha<S, F>
 where
     S: CaptchaStorage,
-    F: CaptchaFinder,
+    F: CaptchaFinder<Token = S::Token, Answer = S::Answer>,
 {
     /// Create a new Captcha
-    pub fn new(storage: S, finder: F) -> Self {
+    pub fn new(storage: impl Into<S>, finder: impl Into<F>) -> Self {
         Self {
-            finder,
+            finder: finder.into(),
-            storage,
+            storage: storage.into(),
             skipper: Box::new(none_skipper),
         }
     }
@@ -94,22 +94,19 @@ where
 
 /// The captcha extension of the depot.
 /// Used to get the captcha info from the depot.
-pub trait CaptchaDepotExt {
+#[easy_ext::ext(CaptchaDepotExt)]
+impl Depot {
     /// Get the captcha state from the depot
-    fn get_captcha_state(&self) -> CaptchaState;
+    pub fn get_captcha_state(&self) -> Option<&CaptchaState> {
-}
+        self.get(CAPTCHA_STATE_KEY).ok()
-
-impl CaptchaDepotExt for Depot {
-    fn get_captcha_state(&self) -> CaptchaState {
-        self.get(CAPTCHA_STATE_KEY).cloned().unwrap_or_default()
     }
 }
 
-#[salvo_core::async_trait]
+#[async_trait::async_trait]
 impl<S, F> Handler for Captcha<S, F>
 where
     S: CaptchaStorage,
-    F: CaptchaFinder + 'static, // why?
+    F: CaptchaFinder<Token = S::Token, Answer = S::Answer> + 'static,
 {
     async fn handle(
         &self,
@@ -125,28 +122,28 @@ where
         }
 
         let token = match self.finder.find_token(req).await {
-            Some(Some(token)) => token,
+            Ok(Some(token)) => token,
-            Some(None) => {
+            Ok(None) => {
                 log::info!("Captcha token is not found in request");
                 depot.insert(CAPTCHA_STATE_KEY, CaptchaState::TokenNotFound);
                 return;
             }
-            None => {
+            Err(err) => {
-                log::error!("Invalid token found in request");
+                log::error!("Failed to find captcha token from request: {err:?}");
                 depot.insert(CAPTCHA_STATE_KEY, CaptchaState::WrongToken);
                 return;
             }
         };
 
         let answer = match self.finder.find_answer(req).await {
-            Some(Some(answer)) => answer,
+            Ok(Some(answer)) => answer,
-            Some(None) => {
+            Ok(None) => {
                 log::info!("Captcha answer is not found in request");
                 depot.insert(CAPTCHA_STATE_KEY, CaptchaState::AnswerNotFound);
                 return;
             }
-            None => {
+            Err(err) => {
-                log::error!("Invalid answer found in request");
+                log::error!("Failed to find captcha answer from request: {err:?}");
                 depot.insert(CAPTCHA_STATE_KEY, CaptchaState::WrongAnswer);
                 return;
             }

src/storage.rs

@@ -26,20 +26,24 @@ pub trait CaptchaStorage: Send + Sync + 'static
 where
     Self: Clone + std::fmt::Debug,
 {
+    /// The token type
+    type Token: TryFrom<String> + std::fmt::Display + Send + Sync;
+    /// The answer type
+    type Answer: std::cmp::PartialEq + From<String> + Send + Sync;
     /// The error type of the storage.
     type Error: std::fmt::Display + std::fmt::Debug + Send;
 
     /// Store the captcha token and answer.
     fn store_answer(
         &self,
-        answer: String,
+        answer: Self::Answer,
-    ) -> impl std::future::Future<Output = Result<String, Self::Error>> + Send;
+    ) -> impl std::future::Future<Output = Result<Self::Token, Self::Error>> + Send;
 
     /// Returns the answer of the captcha token. This method will return None if the token is not exist.
     fn get_answer(
         &self,
-        token: &str,
+        token: &Self::Token,
-    ) -> impl std::future::Future<Output = Result<Option<String>, Self::Error>> + Send;
+    ) -> impl std::future::Future<Output = Result<Option<Self::Answer>, Self::Error>> + Send;
 
     /// Clear the expired captcha.
     fn clear_expired(
@@ -50,7 +54,7 @@ where
     /// Clear the captcha by token.
     fn clear_by_token(
         &self,
-        token: &str,
+        token: &Self::Token,
     ) -> impl std::future::Future<Output = Result<(), Self::Error>> + Send;
 }
 
@@ -82,17 +86,19 @@ impl CacacheStorage {
 #[cfg(feature = "cacache-storage")]
 impl CaptchaStorage for CacacheStorage {
     type Error = cacache::Error;
+    type Token = String;
+    type Answer = String;
 
-    async fn store_answer(&self, answer: String) -> Result<String, Self::Error> {
+    async fn store_answer(&self, answer: Self::Answer) -> Result<Self::Token, Self::Error> {
         let token = uuid::Uuid::new_v4();
         log::info!("Storing captcha answer to cacache for token: {token}");
         cacache::write(&self.cache_dir, token.to_string(), answer.as_bytes()).await?;
         Ok(token.to_string())
     }
 
-    async fn get_answer(&self, token: &str) -> Result<Option<String>, Self::Error> {
+    async fn get_answer(&self, token: &Self::Token) -> Result<Option<Self::Answer>, Self::Error> {
         log::info!("Getting captcha answer from cacache for token: {token}");
-        match cacache::read(&self.cache_dir, token).await {
+        match cacache::read(&self.cache_dir, token.to_string()).await {
             Ok(answer) => {
                 log::info!("Captcha answer is exist in cacache for token: {token}");
                 Ok(Some(
@@ -114,7 +120,7 @@ impl CaptchaStorage for CacacheStorage {
     async fn clear_expired(&self, expired_after: Duration) -> Result<(), Self::Error> {
         let now = SystemTime::now()
             .duration_since(std::time::UNIX_EPOCH)
-            .expect("SystemTime before UNIX EPOCH!")
+            .expect("SystemTime must be later than UNIX_EPOCH")
             .as_millis();
         let expired_after = expired_after.as_millis();
 
@@ -137,10 +143,10 @@ impl CaptchaStorage for CacacheStorage {
         Ok(())
     }
 
-    async fn clear_by_token(&self, token: &str) -> Result<(), Self::Error> {
+    async fn clear_by_token(&self, token: &Self::Token) -> Result<(), Self::Error> {
         log::info!("Clearing captcha token from cacache: {token}");
         let remove_opts = cacache::RemoveOpts::new().remove_fully(true);
-        remove_opts.remove(&self.cache_dir, token).await
+        remove_opts.remove(&self.cache_dir, token.to_string()).await
     }
 }
 
@@ -149,18 +155,20 @@ where
     T: CaptchaStorage,
 {
     type Error = T::Error;
+    type Token = T::Token;
+    type Answer = T::Answer;
 
     fn store_answer(
         &self,
-        answer: String,
+        answer: Self::Answer,
-    ) -> impl std::future::Future<Output = Result<String, Self::Error>> + Send {
+    ) -> impl std::future::Future<Output = Result<Self::Token, Self::Error>> + Send {
         self.as_ref().store_answer(answer)
     }
 
     fn get_answer(
         &self,
-        token: &str,
+        token: &Self::Token,
-    ) -> impl std::future::Future<Output = Result<Option<String>, Self::Error>> + Send {
+    ) -> impl std::future::Future<Output = Result<Option<Self::Answer>, Self::Error>> + Send {
         self.as_ref().get_answer(token)
     }
 
@@ -173,18 +181,18 @@ where
 
     fn clear_by_token(
         &self,
-        token: &str,
+        token: &Self::Token,
     ) -> impl std::future::Future<Output = Result<(), Self::Error>> + Send {
         self.as_ref().clear_by_token(token)
     }
 }
 
 #[cfg(test)]
-#[cfg(feature = "cacache-storage")]
 mod tests {
     use super::*;
 
     #[tokio::test]
+    #[cfg(feature = "cacache-storage")]
     async fn cacache_store_captcha() {
         let storage = CacacheStorage::new(
             tempfile::tempdir()
@@ -207,6 +215,7 @@ mod tests {
     }
 
     #[tokio::test]
+    #[cfg(feature = "cacache-storage")]
     async fn cacache_clear_expired() {
         let storage = CacacheStorage::new(
             tempfile::tempdir()
@@ -231,6 +240,7 @@ mod tests {
     }
 
     #[tokio::test]
+    #[cfg(feature = "cacache-storage")]
     async fn cacache_clear_by_token() {
         let storage = CacacheStorage::new(
             tempfile::tempdir()
@@ -255,6 +265,7 @@ mod tests {
     }
 
     #[tokio::test]
+    #[cfg(feature = "cacache-storage")]
     async fn cacache_is_token_exist() {
         let storage = CacacheStorage::new(
             tempfile::tempdir()
@@ -273,13 +284,14 @@ mod tests {
             .expect("failed to check if token is exist")
             .is_some());
         assert!(storage
-            .get_answer("token")
+            .get_answer(&"token".to_owned())
             .await
             .expect("failed to check if token is exist")
             .is_none());
     }
 
     #[tokio::test]
+    #[cfg(feature = "cacache-storage")]
     async fn cacache_get_answer() {
         let storage = CacacheStorage::new(
             tempfile::tempdir()
@@ -300,13 +312,14 @@ mod tests {
             Some("answer".to_owned())
         );
         assert!(storage
-            .get_answer("token")
+            .get_answer(&"token".to_owned())
             .await
             .expect("failed to get captcha answer")
             .is_none());
     }
 
     #[tokio::test]
+    #[cfg(feature = "cacache-storage")]
     async fn cacache_cache_dir() {
         let cache_dir = tempfile::tempdir()
             .expect("failed to create temp file")
@@ -317,6 +330,7 @@ mod tests {
     }
 
     #[tokio::test]
+    #[cfg(feature = "cacache-storage")]
     async fn cacache_clear_expired_with_expired_after() {
         let storage = CacacheStorage::new(
             tempfile::tempdir()