# Challenge Solver Integration Examples
## Complete Workflow Example
```rust
use acmex::{
ChallengeSolver, ChallengeSolverRegistry, Http01Solver, Dns01Solver,
ChallengeType, AcmeConfig, DirectoryManager, NonceManager, AccountManager, KeyPair,
};
use std::sync::Arc;
#[tokio::main]
async fn main() -> Result<()> {
// 1. Setup ACME client
let config = AcmeConfig::lets_encrypt_staging()
.with_contact(Contact::email("admin@example.com"));
let http_client = reqwest::Client::new();
let dir_mgr = DirectoryManager::new(&config.directory_url, http_client.clone());
let directory = dir_mgr.get().await?;
// 2. Create account
let key_pair = KeyPair::generate()?;
let nonce_mgr = NonceManager::new(&directory.new_nonce, http_client.clone());
let account_mgr = AccountManager::new(
&key_pair,
&nonce_mgr,
&dir_mgr,
&http_client,
)?;
let account = account_mgr.register(
vec![Contact::email("admin@example.com")],
true,
).await?;
// 3. Create order for domains
let order_req = NewOrderRequest::new(vec![
"example.com".to_string(),
"www.example.com".to_string(),
]);
// 4. Setup challenge solvers
let mut registry = ChallengeSolverRegistry::new();
registry.register(Http01Solver::default_addr());
registry.register(Dns01Solver::with_mock("example.com".to_string()));
// 5. For each authorization, solve challenge
// ... (Order creation and challenge handling)
Ok(())
}
```
## HTTP-01 Only Example
```rust
use acmex::{Http01Solver, ChallengeSolver};
use std::net::SocketAddr;
#[tokio::main]
async fn main() -> Result<()> {
let addr: SocketAddr = "0.0.0.0:80".parse()?;
let mut solver = Http01Solver::new(addr);
// Get challenge from ACME server...
let challenge = get_acme_challenge().await?;
let key_auth = compute_key_authorization(&challenge)?;
// Prepare: start HTTP server
solver.prepare(&challenge, &key_auth).await?;
println!("✅ HTTP server running on port 80");
// Present: tell ACME server we're ready
solver.present().await?;
println!("✅ Presented to ACME server");
// Wait for ACME validation (ACME server checks our HTTP endpoint)
tokio::time::sleep(Duration::from_secs(5)).await;
// Verify: check if we solved it
match solver.verify().await? {
true => println!("✅ Challenge verified"),
false => println!("❌ Challenge not verified"),
}
// Cleanup: stop HTTP server
solver.cleanup().await?;
println!("✅ Cleaned up");
Ok(())
}
```
## DNS-01 Only Example
```rust
use acmex::{Dns01Solver, ChallengeSolver, DnsProvider, MockDnsProvider};
#[tokio::main]
async fn main() -> Result<()> {
// Using mock provider for demo
let mut solver = Dns01Solver::with_mock("example.com".to_string());
let challenge = get_acme_challenge().await?;
let key_auth = compute_key_authorization(&challenge)?;
// Prepare: create DNS record
solver.prepare(&challenge, &key_auth).await?;
println!("✅ DNS TXT record created");
println!(" _acme-challenge.example.com = {}", key_auth);
// Present: tell ACME we're ready
solver.present().await?;
println!("✅ Presented to ACME server");
// Wait for DNS propagation
tokio::time::sleep(Duration::from_secs(10)).await;
// Verify
match solver.verify().await? {
true => println!("✅ Challenge verified"),
false => println!("❌ Challenge not verified"),
}
// Cleanup: delete DNS record
solver.cleanup().await?;
println!("✅ DNS record deleted");
Ok(())
}
```
## Multi-Domain HTTP-01 Challenge
```rust
use acmex::{Http01Solver, ChallengeSolver, NewOrderRequest};
#[tokio::main]
async fn main() -> Result<()> {
// Setup
let mut http_solver = Http01Solver::new("0.0.0.0:80".parse()?);
// Create order for multiple domains
let order_req = NewOrderRequest::new(vec![
"example.com".to_string(),
"www.example.com".to_string(),
"api.example.com".to_string(),
]);
// Get all authorizations
let authorizations = create_and_get_authorizations(&order_req).await?;
// For each authorization, create and present HTTP-01 challenge
for auth in &authorizations {
for challenge in &auth.challenges {
if challenge.challenge_type == "http-01" {
let key_auth = compute_key_authorization(challenge)?;
// Both domains can use same HTTP solver (router handles routing)
http_solver.prepare(challenge, &key_auth).await?;
http_solver.present().await?;
}
}
}
// Wait for ACME validation
wait_for_acme_validation().await?;
// Cleanup
http_solver.cleanup().await?;
// Continue with order finalization...
Ok(())
}
```
## Custom DNS Provider Example
```rust
use acmex::{Dns01Solver, DnsProvider};
use async_trait::async_trait;
use std::sync::Arc;
/// Your custom DNS provider implementation
struct MyCloudFlareProvider {
api_token: String,
zone_id: String,
}
#[async_trait]
impl DnsProvider for MyCloudFlareProvider {
async fn create_txt_record(&self, domain: &str, value: &str) -> Result<String> {
// Call CloudFlare API
let record_id = call_cloudflare_api(
&self.api_token,
&self.zone_id,
"POST",
&format!("record-name={}&record-type=TXT&value={}", domain, value),
)
.await?;
Ok(record_id)
}
async fn delete_txt_record(&self, domain: &str, record_id: &str) -> Result<()> {
// Call CloudFlare delete API
call_cloudflare_api(
&self.api_token,
&self.zone_id,
"DELETE",
&format!("record-id={}", record_id),
)
.await?;
Ok(())
}
async fn verify_record(&self, domain: &str, value: &str) -> Result<bool> {
// Query CloudFlare API to check if record exists
let exists = query_cloudflare_dns(&self.api_token, domain, value).await?;
Ok(exists)
}
}
#[tokio::main]
async fn main() -> Result<()> {
let provider = Arc::new(MyCloudFlareProvider {
api_token: "your-api-token".to_string(),
zone_id: "your-zone-id".to_string(),
});
let mut solver = Dns01Solver::new(provider, "example.com".to_string());
// Use as normal
let challenge = get_challenge().await?;
solver.prepare(&challenge, &key_auth).await?;
solver.present().await?;
solver.cleanup().await?;
Ok(())
}
```
## Retry and Error Handling
```rust
use acmex::ChallengeSolver;
use std::time::Duration;
#[tokio::main]
async fn main() -> Result<()> {
let mut solver = Http01Solver::new("0.0.0.0:80".parse()?);
// Prepare with retries
for attempt in 0..3 {
match solver.prepare(&challenge, &key_auth).await {
Ok(_) => {
println!("✅ Prepared on attempt {}", attempt + 1);
break;
}
Err(e) if attempt < 2 => {
eprintln!("⚠️ Prepare failed: {}, retrying...", e);
tokio::time::sleep(Duration::from_secs(2)).await;
}
Err(e) => return Err(e),
}
}
// Present
solver.present().await?;
// Verify with timeout
let verified = tokio::time::timeout(
Duration::from_secs(60),
solver.verify()
)
.await??;
if !verified {
eprintln!("❌ Challenge verification failed");
}
// Always cleanup
if let Err(e) = solver.cleanup().await {
eprintln!("⚠️ Cleanup failed: {}", e);
}
Ok(())
}
```
## Concurrent Challenges
```rust
use futures::future::join_all;
#[tokio::main]
async fn main() -> Result<()> {
let challenges = get_multiple_challenges().await?;
// Create solver for each challenge
let mut solvers = Vec::new();
for challenge in &challenges {
let mut solver = create_appropriate_solver(challenge)?;
solvers.push(solver);
}
// Prepare all in parallel
let prepare_tasks = solvers
.iter_mut()
.zip(&challenges)
.map(|(solver, challenge)| {
let key_auth = compute_key_authorization(challenge)?;
solver.prepare(challenge, &key_auth)
});
join_all(prepare_tasks).await
.into_iter()
.collect::<Result<Vec<_>>>()?;
println!("✅ All challenges prepared");
// Present all
let present_tasks = solvers.iter().map(|s| s.present());
join_all(present_tasks).await
.into_iter()
.collect::<Result<Vec<_>>>()?;
// Wait for validation
tokio::time::sleep(Duration::from_secs(5)).await;
// Cleanup all
let cleanup_tasks = solvers.iter_mut().map(|s| s.cleanup());
join_all(cleanup_tasks).await
.into_iter()
.collect::<Result<Vec<_>>>()?;
println!("✅ All challenges completed");
Ok(())
}
```
---
## Testing Examples
Run tests with:
```bash
cargo test --lib challenge::http01
cargo test --lib challenge::dns01
```
Test-specific usage:
```rust
#[cfg(test)]
mod tests {
use super::*;
#[tokio::test]
async fn test_http01_workflow() {
let mut solver = Http01Solver::new("127.0.0.1:9999".parse().unwrap());
let challenge = Challenge { /* ... */ };
let key_auth = "test-token.test-thumbprint";
solver.prepare(&challenge, key_auth).await.unwrap();
assert!(solver.verify().await.unwrap());
solver.cleanup().await.unwrap();
}
#[tokio::test]
async fn test_dns01_workflow() {
let mut solver = Dns01Solver::with_mock("example.com".to_string());
let challenge = Challenge { /* ... */ };
let key_auth = "test-token.test-thumbprint";
solver.prepare(&challenge, key_auth).await.unwrap();
assert!(solver.verify().await.unwrap());
solver.cleanup().await.unwrap();
}
}
```
---
**Version**: v0.2.0
**Last Updated**: 2026-02-07