potados99/index.js

## index.js
const fs = require('fs').promises;
const path = require('path');
const { randomUUID } = require('crypto');

async function getDataSource(channelName) {
  const channelNameSanitized = channelName.replace(/\//g, '').replace(/\./g, '').trim();
  if (!channelNameSanitized) {
    throw new Error(`Invalid channel name: [${channelName}]`);
  }

  const filePath = path.join('/mnt/storage/channels/', `${channelNameSanitized}.json`);

  // 파일이 없으면 생성합니다.
  try {
    await fs.access(filePath);
  } catch (e) {
    await fs.writeFile(filePath, '[]');
  }

  return filePath;
}

async function getBackupDataSource() {
  const filePath = path.join('/mnt/storage/', `combined.json`);

  // 파일이 없으면 생성합니다.
  try {
    await fs.access(filePath);
  } catch (e) {
    await fs.writeFile(filePath, '[]');
  }

  return filePath;
}

async function getStorage(dataSource) {
  const file = dataSource;

  return {
    getAllMessages: async function() {
      const fileContents = await fs.readFile(file);

      return JSON.parse(fileContents);
    },

    getMessage: async function(messageId) {
      const allMessages = await this.getAllMessages();

      if (['last', 'latest'].includes(messageId.toLowerCase())) {
        // 가장 마지막(최근) 것을 줍니다.
        return allMessages.pop();
      }

      return allMessages.filter(message => message.id === messageId).pop();
    },

    addMessage: async function({channelName, timeEpoch, userAgent, sourceIp, content}) {
      const allMessages = await this.getAllMessages();
      const newMessage = {
        id: randomUUID(),
        channel: channelName,
        timestamp: timeEpoch,
        date: new Date(timeEpoch).toLocaleString('ko-KR', {timeZone: 'Asia/Seoul'}),
        userAgent,
        sourceIp,
        body: content
      };

      allMessages.push(newMessage);

      await fs.writeFile(file, JSON.stringify(allMessages, null, 4));
    },

    deleteAllMessages: async function() {
      await fs.writeFile(file, '[]');
    }
  };
}

async function getChannelNameAndMessageId(pathParameters) {
  if (pathParameters == null) {
    // 최상위 경로(/)로 들어오면 pathParameters가 없습니다.
    return {
      channelName: 'default',
      messageId: undefined
    };
  }

  const {channel, message} = pathParameters;

  return {
    channelName: channel,
    messageId: message
  };
}

async function getRoute(event) {
  const {
    pathParameters,
    queryStringParameters,
    isBase64Encoded,
    body,
    requestContext: {timeEpoch, http: {method, userAgent, sourceIp}}
  } = event;

  const {channelName, messageId} = await getChannelNameAndMessageId(pathParameters);

  const storage = await getStorage(await getDataSource(channelName));
  const backupStorage = await getStorage(await getBackupDataSource());

  const routes = {
    get: async function() {
      const isCurl = userAgent.includes('curl');
      const isApiCall = queryStringParameters?.response?.toLowerCase() === 'api';
      const messages = messageId == null ? await storage.getAllMessages() : await storage.getMessage(messageId);

      if (messages == null) {
        return {
          statusCode: 404,
          body: 'Message not found.'
        };
      }

      if (isCurl || isApiCall) {
        // 커맨드라인에서 curl로 들어온 요청이거나,
        // response 파라미터가 api인 요청인 경우,
        // application/json으로 내려줍니다.
        return {
          statusCode: 200,
          headders: {
            'Content-Type': 'application/json'
          },
          body: JSON.stringify(messages, null, 4)
        };
      } else {
        // 아닌 경우, 웹 브라우저로 간주하고 text/html로 내려줍니다.
        return {
          statusCode: 200,
          headers: {
            'Content-Type': 'text/html'
          },
          body: `
          <html lang='ko'>
            <head>
              <meta charset='utf-8'>
              <meta name='viewport' content='width=device-width,initial-scale=1'>
              <title>감자도스 수집기</title>
            </head>
            <body>
              <h2>${channelName}</h2>

              <pre style='white-space: pre-wrap;'>${JSON.stringify(messages, null, 4)}</pre>

              <form onSubmit="fetch('/${channelName}', {method: 'POST', body: document.getElementById('form_content').value}).then(() => window.location.reload()); return false;">
                <input type='text' id='form_content'>
                <input type='submit' value='등록'>
              </form>
              <form onSubmit="fetch('/${channelName}', {method: 'DELETE'}).then(() => window.location.reload()); return false;">
                <input type='submit' value='초기화' style='background: red;'>
              </form>

            </body>
          </html>`
        };
      }
    },

    post: async function() {
      const content = isBase64Encoded ? Buffer.from(body, 'base64').toString('utf8') : body;

      await storage.addMessage({
        channelName, timeEpoch, userAgent, sourceIp, content
      });

      await backupStorage.addMessage({
        channelName, timeEpoch, userAgent, sourceIp, content
      });

      return {
        statusCode: 200,
        body: '굿\n'
      };
    },

    delete: async function() {
      await storage.deleteAllMessages();

      return {
        statusCode: 200,
        body: '굿\n'
      };
    }
  };

  const handler = routes[method.toLowerCase()];
  if (handler == null) {
    throw new Error(`Unknown method: [${method}]`);
  }

  return handler;
}

exports.handler = async (event) => {
  const route = await getRoute(event);

  return route();
};
	const fs = require('fs').promises;
	const path = require('path');
	const { randomUUID } = require('crypto');

	async function getDataSource(channelName) {
	const channelNameSanitized = channelName.replace(/\//g, '').replace(/\./g, '').trim();
	if (!channelNameSanitized) {
	throw new Error(`Invalid channel name: [${channelName}]`);
	}

	const filePath = path.join('/mnt/storage/channels/', `${channelNameSanitized}.json`);

	// 파일이 없으면 생성합니다.
	try {
	await fs.access(filePath);
	} catch (e) {
	await fs.writeFile(filePath, '[]');
	}

	return filePath;
	}

	async function getBackupDataSource() {
	const filePath = path.join('/mnt/storage/', `combined.json`);

	// 파일이 없으면 생성합니다.
	try {
	await fs.access(filePath);
	} catch (e) {
	await fs.writeFile(filePath, '[]');
	}

	return filePath;
	}

	async function getStorage(dataSource) {
	const file = dataSource;

	return {
	getAllMessages: async function() {
	const fileContents = await fs.readFile(file);

	return JSON.parse(fileContents);
	},

	getMessage: async function(messageId) {
	const allMessages = await this.getAllMessages();

	if (['last', 'latest'].includes(messageId.toLowerCase())) {
	// 가장 마지막(최근) 것을 줍니다.
	return allMessages.pop();
	}

	return allMessages.filter(message => message.id === messageId).pop();
	},

	addMessage: async function({channelName, timeEpoch, userAgent, sourceIp, content}) {
	const allMessages = await this.getAllMessages();
	const newMessage = {
	id: randomUUID(),
	channel: channelName,
	timestamp: timeEpoch,
	date: new Date(timeEpoch).toLocaleString('ko-KR', {timeZone: 'Asia/Seoul'}),
	userAgent,
	sourceIp,
	body: content
	};

	allMessages.push(newMessage);

	await fs.writeFile(file, JSON.stringify(allMessages, null, 4));
	},

	deleteAllMessages: async function() {
	await fs.writeFile(file, '[]');
	}
	};
	}

	async function getChannelNameAndMessageId(pathParameters) {
	if (pathParameters == null) {
	// 최상위 경로(/)로 들어오면 pathParameters가 없습니다.
	return {
	channelName: 'default',
	messageId: undefined
	};
	}

	const {channel, message} = pathParameters;

	return {
	channelName: channel,
	messageId: message
	};
	}

	async function getRoute(event) {
	const {
	pathParameters,
	queryStringParameters,
	isBase64Encoded,
	body,
	requestContext: {timeEpoch, http: {method, userAgent, sourceIp}}
	} = event;

	const {channelName, messageId} = await getChannelNameAndMessageId(pathParameters);

	const storage = await getStorage(await getDataSource(channelName));
	const backupStorage = await getStorage(await getBackupDataSource());

	const routes = {
	get: async function() {
	const isCurl = userAgent.includes('curl');
	const isApiCall = queryStringParameters?.response?.toLowerCase() === 'api';
	const messages = messageId == null ? await storage.getAllMessages() : await storage.getMessage(messageId);

	if (messages == null) {
	return {
	statusCode: 404,
	body: 'Message not found.'
	};
	}

	if (isCurl \|\| isApiCall) {
	// 커맨드라인에서 curl로 들어온 요청이거나,
	// response 파라미터가 api인 요청인 경우,
	// application/json으로 내려줍니다.
	return {
	statusCode: 200,
	headders: {
	'Content-Type': 'application/json'
	},
	body: JSON.stringify(messages, null, 4)
	};
	} else {
	// 아닌 경우, 웹 브라우저로 간주하고 text/html로 내려줍니다.
	return {
	statusCode: 200,
	headers: {
	'Content-Type': 'text/html'
	},
	body: `
	<html lang='ko'>
	<head>
	<meta charset='utf-8'>
	<meta name='viewport' content='width=device-width,initial-scale=1'>
	<title>감자도스 수집기</title>
	</head>
	<body>
	<h2>${channelName}</h2>

	<pre style='white-space: pre-wrap;'>${JSON.stringify(messages, null, 4)}</pre>

	<form onSubmit="fetch('/${channelName}', {method: 'POST', body: document.getElementById('form_content').value}).then(() => window.location.reload()); return false;">
	<input type='text' id='form_content'>
	<input type='submit' value='등록'>
	</form>
	<form onSubmit="fetch('/${channelName}', {method: 'DELETE'}).then(() => window.location.reload()); return false;">
	<input type='submit' value='초기화' style='background: red;'>
	</form>

	</body>
	</html>`
	};
	}
	},

	post: async function() {
	const content = isBase64Encoded ? Buffer.from(body, 'base64').toString('utf8') : body;

	await storage.addMessage({
	channelName, timeEpoch, userAgent, sourceIp, content
	});

	await backupStorage.addMessage({
	channelName, timeEpoch, userAgent, sourceIp, content
	});

	return {
	statusCode: 200,
	body: '굿\n'
	};
	},

	delete: async function() {
	await storage.deleteAllMessages();

	return {
	statusCode: 200,
	body: '굿\n'
	};
	}
	};

	const handler = routes[method.toLowerCase()];
	if (handler == null) {
	throw new Error(`Unknown method: [${method}]`);
	}

	return handler;
	}

	exports.handler = async (event) => {
	const route = await getRoute(event);

	return route();
	};