Refactor upload function and improve file handling

[cf-pages]

Solve issue: #178 #180 #182

Use tg channel/chat for storage

How to use?

First, you need to create a new telegram bot to obtain the token and a telegram channel to obtain Chat_ID

How to Obtain Bot_Token and Chat_ID for Telegram

If you don't have a Telegram account yet, please create one first. Then, follow these steps to get the Bot_Token and Chat_ID:

1. Get the Bot_Token

   • In Telegram, send the command /newbot to @BotFather, and follow the prompts to input your bot's name and username. Once successfully created, you will receive a Bot_Token, which is used to interact with the Telegram API.

2. Set the bot as a channel administrator

   • Create a new channel and, after entering the channel, go to channel settings. Add the bot you just created as a channel administrator, so it can send messages.

3. Get the Chat_ID

   • Use @GetTheirIDBot to get your channel ID. Send a message to this bot and follow the instructions to receive your Chat_ID (the ID of your channel).

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[!IMPORTANT]

由于原有的Telegraph API接口被官方关闭，需要将上传渠道切换至Telegram Channel，请按照文档中的部署要求设置TG_Bot_Token和TG_Chat_ID，否则将无法正常使用上传功能。

如何获取Telegram的Bot_Token和Chat_ID

如果您还没有Telegram账户，请先创建一个。接着，按照以下步骤操作以获取BOT_TOKEN和CHAT_ID：

1. 获取Bot_Token
   • 在Telegram中，向@BotFather发送命令/newbot，根据提示依次输入您的机器人名称和用户名。成功创建机器人后，您将会收到一个BOT_TOKEN，用于与Telegram API进行交互。

2. 设置机器人为频道管理员
   • 创建一个新的频道（Channel），进入该频道后，选择频道设置。将刚刚创建的机器人添加为频道管理员，这样机器人才能发送消息。

3. 获取Chat_ID

   • 通过@VersaToolsBot获取您的频道ID。向该机器人发送消息，按照指示操作，最后您将得到CHAT_ID（即频道的ID）。
   • 或者通过@GetTheirIDBot获取您的频道ID。向该机器人发送消息，按照指示操作，最后您将得到CHAT_ID（即频道的ID）。

   

最后去Cloudflare Pages后台设置相关的环境变量（注：修改环境变量后，需要重新部署才能生效）

环境变量	示例值	说明
TG_Bot_Token	123468:AAxxxGKrn5	从@BotFather获取的Telegram Bot Token。
TG_Chat_ID	-1234567	频道的ID，确保TG Bot是该频道或群组的管理员。

本地运行命令，需先按照Cloudflare官方文档安装wrangler

npx wrangler pages dev ./ --kv "img_url" --port 8080 --binding BASIC_USER=admin --binding BASIC_PASS=123 --binding TG_Chat_ID=[Your Chat ID] --binding TG_Bot_Token=[Your Telegram Bot token] --persist-to ./data

Reference: @x-dr/telegraph-Image @MarSeventh/CloudFlare-ImgBed