added example of using mbedtls as a TLS provider

make authentication mode a parameter, default to Required

examples/mbedtls-req/main.rs

@@ -0,0 +1,72 @@
+use std::io::{self, Read};
+use std::sync::{Arc};
+use std::time::Duration;
+use std::{env, error, fmt, result};
+
+pub mod mbedtls_connector;
+
+use log::{error, info};
+use ureq;
+
+#[derive(Debug)]
+struct Oops(String);
+
+impl From<io::Error> for Oops {
+    fn from(e: io::Error) -> Oops {
+        Oops(e.to_string())
+    }
+}
+
+impl From<ureq::Error> for Oops {
+    fn from(e: ureq::Error) -> Oops {
+        Oops(e.to_string())
+    }
+}
+
+impl error::Error for Oops {}
+
+impl fmt::Display for Oops {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        self.0.fmt(f)
+    }
+}
+
+type Result<T> = result::Result<T, Oops>;
+
+fn get(agent: &ureq::Agent, url: &str) -> Result<Vec<u8>> {
+    let response = agent.get(url).call()?;
+    let mut reader = response.into_reader();
+    let mut bytes = vec![];
+    reader.read_to_end(&mut bytes)?;
+    Ok(bytes)
+}
+
+fn get_and_write(agent: &ureq::Agent, url: &str) {
+    info!("🕷️ {}", url);
+    match get(agent, url) {
+        Ok(_) => info!("Good: ✔️ {}\n", url),
+        Err(e) => error!("Bad: ⚠️ {} {}\n", url, e),
+    }
+}
+
+fn main() -> Result<()> {
+    let _args = env::args();
+    env_logger::init();
+
+    let agent = ureq::builder()
+        .tls_connector(Arc::new(mbedtls_connector::MbedTlsConnector::new(mbedtls::ssl::config::AuthMode::None)))
+        .timeout_connect(Duration::from_secs(5))
+        .timeout(Duration::from_secs(20))
+        .build();
+
+    get_and_write(&agent, "https://example.com/");
+
+    Ok(())
+}
+
+/*
+ * Local Variables:
+ * compile-command: "cargo build --example mbedtls-req --features=\"mbedtls\""
+ * mode: rust
+ * End:
+ */