Add simple reverse proxy example

examples/proxy.rs

@@ -0,0 +1,31 @@
+// WARNING: Don't not use it in production!
+// This is just an example, so there is much more to a correct secure reverse proxy implementation.
+//
+// Example: HTTP GET to http://localhost:8080/http-rs/tide
+// $ curl "http://localhost:8080/http-rs/tide"
+// I'll show the Tide page at GitHub
+#[async_std::main]
+async fn main() -> Result<(), std::io::Error> {
+    tide::log::start();
+    let mut app = tide::new();
+    app.at("*").get(|req: tide::Request<()>| async move {
+        let url = "https://github.com"; // Change to your reverse proxy URL
+        let mut req_builder = surf::get(format!("{}{}", url, req.url().path()));
+        for (n, v) in req.iter().filter(|(n, _)| *n != "host") {
+            let v: String = v.iter().map(|s| s.as_str()).collect();
+            req_builder = req_builder.header(n, v);
+        }
+        let mut proxy_res = req_builder.send().await?;
+        let mut res = tide::http::Response::new(proxy_res.status());
+        proxy_res.iter().for_each(|(n, v)| {
+            res.append_header(n, v);
+        });
+        if let Some(mime) = proxy_res.content_type() {
+            res.set_content_type(mime);
+        }
+        res.set_body(proxy_res.take_body());
+        Ok(res)
+    });
+    app.listen("127.0.0.1:8080").await?;
+    Ok(())
+}