From 8d4746aea1659d7e6c7412841f2c4058721a694d Mon Sep 17 00:00:00 2001
From: sengho0606 <htungseng@gmail.com>
Date: Fri, 10 Nov 2023 22:39:32 +0800
Subject: [PATCH] feat: worker fetch example

---
 Cargo.lock                     |  13 +-
 examples/fetcher/.gitignore    |   4 +
 examples/fetcher/Cargo.lock    | 884 +++++++++++++++++++++++++++++++++
 examples/fetcher/Cargo.toml    |  16 +
 examples/fetcher/README.md     |   3 +
 examples/fetcher/src/lib.rs    |  21 +
 examples/fetcher/wrangler.toml |   6 +
 7 files changed, 945 insertions(+), 2 deletions(-)
 create mode 100644 examples/fetcher/.gitignore
 create mode 100644 examples/fetcher/Cargo.lock
 create mode 100644 examples/fetcher/Cargo.toml
 create mode 100644 examples/fetcher/README.md
 create mode 100644 examples/fetcher/src/lib.rs
 create mode 100644 examples/fetcher/wrangler.toml

diff --git a/Cargo.lock b/Cargo.lock
index 006c7630..21d00d0e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -298,6 +298,15 @@ dependencies = [
  "instant",
 ]
 
+[[package]]
+name = "fetcher-on-workers"
+version = "0.0.1"
+dependencies = [
+ "serde",
+ "serde_json",
+ "worker",
+]
+
 [[package]]
 name = "filetime"
 version = "0.2.21"
@@ -1336,9 +1345,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.96"
+version = "1.0.108"
 source = "registry+https://github.com/rust-lang/crates.io-index"
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+checksum = "3d1c7e3eac408d115102c4c24ad393e0821bb3a5df4d506a80f85f7a742a526b"
 dependencies = [
  "itoa",
  "ryu",
diff --git a/examples/fetcher/.gitignore b/examples/fetcher/.gitignore
new file mode 100644
index 00000000..7708da3d
--- /dev/null
+++ b/examples/fetcher/.gitignore
@@ -0,0 +1,4 @@
+/target
+/build
+/node_modules
+/pkg
diff --git a/examples/fetcher/Cargo.lock b/examples/fetcher/Cargo.lock
new file mode 100644
index 00000000..794dcaf0
--- /dev/null
+++ b/examples/fetcher/Cargo.lock
@@ -0,0 +1,884 @@
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diff --git a/examples/fetcher/Cargo.toml b/examples/fetcher/Cargo.toml
new file mode 100644
index 00000000..99a3a6a7
--- /dev/null
+++ b/examples/fetcher/Cargo.toml
@@ -0,0 +1,16 @@
+[package]
+name = "fetcher-on-workers"
+version = "0.0.1"
+edition = "2021"
+
+# https://github.com/rustwasm/wasm-pack/issues/1247
+[package.metadata.wasm-pack.profile.release]
+wasm-opt = false
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+worker = { workspace = true }
+serde = "1.0.188"
+serde_json = "1.0.108"
diff --git a/examples/fetcher/README.md b/examples/fetcher/README.md
new file mode 100644
index 00000000..7cdce549
--- /dev/null
+++ b/examples/fetcher/README.md
@@ -0,0 +1,3 @@
+# `fetcher` on Cloudflare Workers
+
+Demonstration of fetching external API on Cloudflare Workers using `worker::Fetch`.
diff --git a/examples/fetcher/src/lib.rs b/examples/fetcher/src/lib.rs
new file mode 100644
index 00000000..bb7d8af8
--- /dev/null
+++ b/examples/fetcher/src/lib.rs
@@ -0,0 +1,21 @@
+use worker::{event, Context, Env, Fetch, Request, Response, Result, RouteContext, Router, Url};
+
+const ENDPOINT: &str = "https://pokeapi.co/api/v2/pokemon";
+
+async fn fetch_pokemon(url_string: &str) -> Result<Response> {
+    // construct a new Url
+    let url = Url::parse(url_string)?;
+    Fetch::Url(url).send().await
+}
+
+async fn handle_single(_: Request, ctx: RouteContext<()>) -> Result<Response> {
+    Ok(fetch_pokemon(&format!("{ENDPOINT}/{}", ctx.param("name").unwrap())).await?)
+}
+
+#[event(fetch)]
+pub async fn main(req: Request, env: Env, _ctx: Context) -> Result<Response> {
+    Router::new()
+        .get_async("/pokemon/:name", handle_single)
+        .run(req, env)
+        .await
+}
diff --git a/examples/fetcher/wrangler.toml b/examples/fetcher/wrangler.toml
new file mode 100644
index 00000000..2f93be0a
--- /dev/null
+++ b/examples/fetcher/wrangler.toml
@@ -0,0 +1,6 @@
+name = "fetcher-on-workers"
+main = "build/worker/shim.mjs"
+compatibility_date = "2023-03-22"
+
+[build]
+command = "cargo install --path ../../worker-build && worker-build --release"