[WIP] Ch. 17: rewrite the opening example

- Add `reqwest` and `scraper` dependencies to the `trpl` crate.

Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-members = ["packages/tools"]
+members = [ "listings/ch17-async-await/listing-scraper-01","packages/tools"]
 default-members = ["packages/tools"]
 resolver = "2"
 exclude = [

listings/ch17-async-await/listing-17-10/src/main.rs

@@ -22,11 +22,9 @@ fn main() {
         };
 
         let rx_fut = async {
-            // ANCHOR: loop
             while let Some(value) = rx.recv().await {
                 println!("received '{value}'");
             }
-            // ANCHOR_END: loop
         };
 
         trpl::join(tx_fut, rx_fut).await;

listings/ch17-async-await/listing-17-11/src/main.rs

@@ -31,4 +31,3 @@ fn main() {
         // ANCHOR_END: with-move
     });
 }
-// ANCHOR_END: all

listings/ch17-async-await/listing-scraper-01/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "listing-scraper-01"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+trpl = { path = "../../../packages/trpl" }

listings/ch17-async-await/listing-scraper-01/src/main.rs

@@ -0,0 +1,17 @@
+extern crate trpl; // required for mdbook test
+
+fn main() {
+    // TODO: we'll add this next!
+}
+
+// ANCHOR: all
+use trpl::Html;
+
+async fn page_title_for(url: &str) -> Option<String> {
+    let response = trpl::get(url).await;
+    let response_text = response.text().await;
+    Html::parse(&response_text)
+        .select_first("title")
+        .map(|title| title.inner_html())
+}
+// ANCHOR_END: all