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Freshの備忘録 Part1 ~ GETとPOSTメソッドの使い方 ~

Posted at

基本的な内容ですが、Freshを学んでいるときに地味に時間を要してしまったので、残しておきます。

内容

GETとPOSTでのデータの受け渡し方法について

■GETでのデータ受け渡し

データ送信用のページ

routes/get-send.tsx
import { Handlers, PageProps } from "$fresh/server.ts";

export default function GetSendPage() {
  return (
    <div>
      <form method="GET" action="/get-reception">
        <input type="text" name="userName" />
        <button type="submit">Submit</button>
      </form>
    </div>
  );
}

データ受信用のページ

routes/post-reception.tsx
import { Handlers, PageProps } from "$fresh/server.ts";

interface Data {
  userName: string;
}

export const handler: Handlers<Data> = {
  async GET(req, ctx) {
    const url = new URL(req.url);
    const userName = url.searchParams.get("userName") || "";
    return ctx.render({ userName });
  },
};

export default function PostReceptionPage({ data }: PageProps<Data | null>) {
  if (!data?.userName) {
    return <h1>そんなユーザーはいないでござる</h1>;
  }

  return (
    <div>
      <h1>{data.userName} です </h1>
    </div>
  );
}

■POSTでのデータ受け渡し

データ送信用のページ

routes/post-send.tsx
import { Handlers, PageProps } from "$fresh/server.ts";

export default function PostSendPage() {
  return (
    <div>
      <form method="POST" action="/post-reception">
        <input type="text" name="userName" />
        <button type="submit">Submit</button>
      </form>
    </div>
  );
}

データ受信用のページ

routes/post-reception.tsx
import { Handlers, PageProps } from "$fresh/server.ts";

interface Data {
  userName: string;
}

export const handler: Handlers<Data> = {
  async POST(req, ctx) {
    const formData = await req.formData();
    const userName = formData.get("userName")?.toString() || "";
    return ctx.render({ userName });
  },
};

export default function PostReceptionPage({ data }: PageProps<Data | null>) {
  if (!data?.userName) {
    return <h1>そんなユーザーはいないでござる</h1>;
  }

  return (
    <div>
      <h1>{data.userName} です </h1>
    </div>
  );
}

参考資料

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