"response_type": "code",
              "state": state,
              "redirect_uri": callback_uri,
              "scope": "openid"}

    url = authorize_url + "?" + urllib.parse.urlencode(params)
    return url


@app.route('/oauth2/callback')
def callback():
    error = request.args.get('error', '')
    if error:
        return "Error: " + error

	Date    time.Time
	Expires time.Duration
}

// Parses signature version '4' query string of the following form.
//
//	querystring = X-Amz-Algorithm=algorithm
//	querystring += &X-Amz-Credential= urlencode(accessKey + '/' + credential_scope)
//	querystring += &X-Amz-Date=date
//	querystring += &X-Amz-Expires=timeout interval
//	querystring += &X-Amz-SignedHeaders=signed_headers
//	querystring += &X-Amz-Signature=signature

        return getPathPrefix(path) + name;
    }

    @Deprecated
    protected static String urlEncode(final String str) {
        if (str == null) {
            return StringUtil.EMPTY;
        }
        return URLEncoder.encode(str, Constants.UTF_8_CHARSET);
    }

    @Deprecated
    protected static String urlDecode(final String str) {
        if (str == null) {
            return StringUtil.EMPTY;
        }

        try {
            return URLEncoder.encode(s, enc);
        } catch (final UnsupportedEncodingException e) {
            throw new IORuntimeException(e);
        }
    }

    /**
     * 指定のエンコーディング方式で<code>application/x-www-form-urlencoded</code>文字列をデコードします。
     *
     * @param s
     *            <code>application/x-www-form-urlencoded</code>でエンコードされた文字列。

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.util;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

    assertUnescaped(e, 'z');
    assertUnescaped(e, 'A');
    assertUnescaped(e, 'Z');
    assertUnescaped(e, '0');
    assertUnescaped(e, '9');

    // Unreserved characters used in java.net.URLEncoder
    assertUnescaped(e, '-');
    assertUnescaped(e, '_');
    assertUnescaped(e, '.');
    assertUnescaped(e, '*');

    assertEscaping(e, "%00", '\u0000'); // nul
    assertEscaping(e, "%7F", '\u007f'); // del

## 🔃 "📨 🏑"

🌌 🕸 📨 (`<form></form>`) 📨 💽 💽 🛎 ⚙️ "🎁" 🔢 👈 📊, ⚫️ 🎏 ⚪️➡️ 🎻.

**FastAPI** 🔜 ⚒ 💭 ✍ 👈 📊 ⚪️➡️ ▶️️ 🥉 ↩️ 🎻.

!!! note "📡 ℹ"
    📊 ⚪️➡️ 📨 🛎 🗜 ⚙️ "📻 🆎" `application/x-www-form-urlencoded`.

    ✋️ 🕐❔ 📨 🔌 📁, ⚫️ 🗜 `multipart/form-data`. 👆 🔜 ✍ 🔃 🚚 📁 ⏭ 📃.

**FastAPI** will make sure to read that data from the right place instead of JSON.

!!! note "Technical Details"
    Data from forms is normally encoded using the "media type" `application/x-www-form-urlencoded`.

    But when the form includes files, it is encoded as `multipart/form-data`. You'll read about handling files in the next chapter.

!!! note "Technische Details"
    Daten aus Formularen werden normalerweise mit dem <abbr title='Media type – Medientyp, Typ des Mediums'>„media type“</abbr> `application/x-www-form-urlencoded` kodiert.

    Wenn das Formular stattdessen Dateien enthält, werden diese mit `multipart/form-data` kodiert. Im nächsten Kapitel erfahren Sie mehr über die Handhabung von Dateien.

    assertUnescaped(e, 'z');
    assertUnescaped(e, 'A');
    assertUnescaped(e, 'Z');
    assertUnescaped(e, '0');
    assertUnescaped(e, '9');

    // Unreserved characters used in java.net.URLEncoder
    assertUnescaped(e, '-');
    assertUnescaped(e, '_');
    assertUnescaped(e, '.');
    assertUnescaped(e, '*');

    assertEscaping(e, "%00", '\u0000'); // nul
    assertEscaping(e, "%7F", '\u007f'); // del