create-session-script.js

const AWS = require('aws-sdk');
AWS.config.update({
    'region': 'ap-northeast-1'
});

const dynamo = new AWS.DynamoDB.DocumentClient();

exports.handler = (event, context, callback) => {
    const l = 8;
    const c = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

    const cl = c.length;
    let r = "";
    for(let i=0; i<l; i++){
      r += c[Math.floor(Math.random()*cl)];
    }
    
    const data = {
        TableName: 'セッションID一覧テーブル',
        Item: {
            設定したキー: r
        }
    }
    
    dynamo.put(data, function(err, data) {
        let result = {result: true, session_id: r};
        if(err) {
            result = {result: false, error: JSON.stringify(err, null, 2)}
        }
        
        callback(null, result)
    });
};