add simple.rs example

Cargo.toml

@@ -20,6 +20,10 @@ tokio-rustls = { version = "0.26.0", default-features = false, features = ["ring
 url = "2.5.2"
 webpki-roots = "0.26.3"
 
+[[example]]
+name = "simple"
+path = "examples/simple.rs"
+
 [[example]]
 name = "main"
 path = "examples/main.rs"

examples/simple.rs

@@ -0,0 +1,54 @@
+use tokio_gemini::{
+    certs::{
+        fingerprint::{generate_fingerprint, Algorithm},
+        verifier::SelfsignedCertVerifier,
+    },
+    Client, LibError,
+};
+
+// Much simpler than examples/main.rs
+// Hardcoded URL, no cert check, always write to stdout
+//
+// cargo add tokio-gemini
+// cargo add tokio -F macros,rt-multi-thread
+//
+
+const URL: &str = "gemini://geminiprotocol.net/docs/protocol-specification.gmi";
+
+#[tokio::main]
+async fn main() -> Result<(), LibError> {
+    let client = Client::builder()
+        .with_selfsigned_cert_verifier(CertVerifier)
+        .build();
+
+    match client.request(URL).await?.ensure_ok() {
+        Ok(mut resp) => {
+            println!("{}", resp.text().await?);
+        }
+        Err(resp) => {
+            println!("{} {}", resp.status().num(), resp.message());
+        }
+    }
+
+    Ok(())
+}
+
+struct CertVerifier;
+
+impl SelfsignedCertVerifier for CertVerifier {
+    fn verify(
+        &self,
+        cert: &tokio_gemini::certs::verifier::CertificateDer,
+        host: &str,
+        _now: tokio_gemini::certs::verifier::UnixTime,
+    ) -> Result<bool, tokio_rustls::rustls::Error> {
+        // For real verification example with known_hosts file
+        // see examples/main.rs
+        eprintln!(
+            "Host = {}\nFingerprint = {}",
+            host,
+            generate_fingerprint(cert, Algorithm::Sha512),
+        );
+        Ok(true)
+    }
+}