Cloudflare Workers KV

Key-Value store

bindings綁定Worker與KV命名空間的通訊

在wrangler.toml中綁定

code:wrangler.toml

name = "worker"

kv_namespaces = [

{ binding = "TODO", id = "06779da6940b431db6e566b4846d64db", preview_id="06779da6940b431db6e566b484a6a769a7a" }

]

使用env.NAMESPACE.get(key);取得key對應的值

code:javascript

export default {

async fetch(request, env, ctx) {

// Get the value for the "to-do:123" key

// NOTE: Relies on the TODO KV binding that maps to the "My Tasks" namespace.

let value = await env.TODO.get("to-do:123");

// Return the value, as is, for the Response

return new Response(value);

};

本地開發時，為了避免影響到上限環境的資料，可改為使用wrangler dev --remote

會改為使用wrangler.toml中以preview_id綁定的KV

wrangler

npx wrangler kv:namespace create TEST_KV

copy ID and paste to wrangler.toml

code:wrangler.toml

kv_namespaces

binding = "TEST_KV"

id = "ID_HERE"

code:index.ts

// 名稱和 binding 相同

const app = new Hono<{

Bindings: { TEST_KV: KVNamespace }

}>();

app.get("/counter", async (c) => {

const key = c.req.query()"key" || "defaultKey";

const count = Number(await c.env.TEST_KV.get(key));

const count = !isNaN(value) ? value + 1 : 1;

// 存入 KV

await c.env.TEST_KV.put(key, String(count));

return c.text(String(count));

});

export default app;

kv.get(key)取值、kv.put(key, value)存值