Deserialize JSON response.

Cargo.lock

@@ -37,6 +37,7 @@ name = "catscii"
 version = "0.1.0"
 dependencies = [
  "reqwest",
+ "serde",
  "tokio",
 ]
 
@@ -664,6 +665,20 @@ name = "serde"
 version = "1.0.163"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2113ab51b87a539ae008b5c6c02dc020ffa39afd2d83cffcb3f4eb2722cebec2"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.163"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8c805777e3930c8883389c602315a24224bcc738b63905ef87cd1420353ea93e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
 
 [[package]]
 name = "serde_json"

Cargo.toml

@@ -6,6 +6,7 @@ edition = "2018"
 
 [dependencies]
 reqwest = { version = "0.11", features = ["json"] }
+serde = { version = "1", features = ["derive"] }
 tokio = { version = "1", features = ["full"] }
 
 [dev-dependencies]

src/main.rs

@@ -1,9 +1,22 @@
+use serde::Deserialize;
+
 #[tokio::main]
 async fn main() {
     let res = reqwest::get("https://api.thecatapi.com/v1/images/search")
         .await
         .unwrap();
-    println!("Status: {}", res.status());
-    let body = res.text().await.unwrap();
-    println!("Body: {}", body);
+    if !res.status().is_success() {
+        panic!("Request failed with HTTP {}", res.status());
+    }
+
+    #[derive(Deserialize)]
+    struct CatImage {
+        url: String,
+    }
+
+    let images: Vec<CatImage> = res.json().await.unwrap();
+    let image = images
+        .first()
+        .expect("the cat API should return at least one image");
+    println!("The image is at {}", image.url);
 }