Dump hex-encoding of images.

src/main.rs

@@ -1,30 +1,39 @@
+use pretty_hex::PrettyHex;
 use serde::Deserialize;
 
 #[tokio::main]
 async fn main() {
-    let url = get_cat_image_url().await.unwrap();
-    println!("The image is at {}", url);
+    let image_bytes = get_cat_image_bytes().await.unwrap();
+    // only dump the first 200 bytes so our terminal survives the onslaught. This will panic if the
+    // image has fewer than 200 bytes.
+    println!("{:?}", &image_bytes[..200].hex_dump());
 }
 
-async fn get_cat_image_url() -> color_eyre::Result<String> {
-    let api_url = "https://api.thecatapi.com/v1/images/search";
-    let res = reqwest::get(api_url).await?;
-    if !res.status().is_success() {
-        return Err(color_eyre::eyre::eyre!(
-            "The Cat API returned HTTP {}",
-            res.status()
-        ));
-    }
-
+async fn get_cat_image_bytes() -> color_eyre::Result<Vec<u8>> {
     #[derive(Deserialize)]
     struct CatImage {
         url: String,
     }
 
-    let mut images: Vec<CatImage> = res.json().await?;
-    if let Some(image) = images.pop() {
-        Ok(image.url)
-    } else {
-        Err(color_eyre::eyre::eyre!("The Cat API returned no images"))
-    }
+    let api_url = "https://api.thecatapi.com/v1/images/search";
+    let client = reqwest::Client::default();
+
+    let image = client
+        .get(api_url)
+        .send()
+        .await?
+        .error_for_status()?
+        .json::<Vec<CatImage>>()
+        .await?
+        .pop()
+        .ok_or_else(|| color_eyre::eyre::eyre!("The Cat API returned no images"))?;
+
+    Ok(client
+        .get(image.url)
+        .send()
+        .await?
+        .error_for_status()?
+        .bytes()
+        .await?
+        .to_vec())
 }