📦 Chat Nio Blob Service

File Service for Chat Nio

👉 More View: Github - Chat Nio Blob Service

Features

• ⚡ Out-of-the-Box: No External Dependencies Required & Support Vercel/Render One-Click Deployment
• ⭐ Multiple File Types: Support Text, Pdf, Docx, Excel, Image, Audio etc.
• 📦 Multiple Storage Options: Base64, Local, S3, Cloudflare R2, Min IO, Telegram CDN etc.
• 🔍 OCR Support: Extract Text from Image (Require Paddle OCR API)
• 🔊 Audio Support: Convert Audio to Text (Require Azure Speech to Text Service)

Supported File Types

• Text
• Image (require vision models)
• Audio (require Azure Speech to Text Service)
• Docx (not support .doc)
• Pdf
• Pptx (not support .ppt)
• Xlsx (support .xls)

API

POST /upload Upload a file

{
    "file": "[file]",
    "enable_ocr": false,
    "enable_vision": true,
    "save_all": false
}

Response

{
  "status": true,
  "type": "pdf",
  "content": "...",
  "error": ""
}

Environment Variables

1 🎨 General Config (Optional)

• PDF_MAX_IMAGES: Max Images Extracted from a PDF File (Default: 10)
  • 0: Never Extract Images
  • -1: Extract All Images
  • other: Extract Top N Images
  • Tips: The extracted images will be treated as a normal image file and directly processed.
• MAX_FILE_SIZE: Max Uploaded File Size MiB (Default: -1, No Limit)
  • Tips: Size limit is also depend on the server configuration (e.g. Nginx/Apache Config, Vercel Free Plan Limit 5MB Body Size)
• CORS_ALLOW_ORIGINS: CORS Allow Origins (Default: *)
  • e.g.: http://localhost:3000,https://example.com

2 🔊 Audio Config (Optional)

• AZURE_SPEECH_KEY: Azure Speech to Text Service Key (Required for Audio Support)
• AZURE_SPEECH_REGION: Azure Speech to Text Service Region (Required for Audio Support)

3 🖼 Storage Config (Optional)

[!NOTE] Storage Config Apply to Image Files And Save All Option Only.

1. ✨ No Storage (Default)

   • No Storage Required & No External Dependencies
   • Base64 Encoding/Decoding
   • Do Not Store Anything
   • Support Serverless Deployment Without Storage (e.g. Vercel)
   • No Direct URL Access (Base64 not support models like gpt-4-all)

2. 📁 Local Storage

   • Require Server Environment (e.g. VPS, Docker)
   • Support Direct URL Access
   • Payless Storage Cost
   • Config:
     • set env STORAGE_TYPE to local (e.g. STORAGE_TYPE=local)
     • set env LOCAL_STORAGE_DOMAIN to your deployment domain (e.g. LOCAL_STORAGE_DOMAIN=http://blob-service.onrender.com)
     • if you are using Docker, you need to mount volume /app/static to the host (e.g. -v /path/to/static:/app/static)

3. 🚀 AWS S3

   • Payment Storage Cost
   • Support Direct URL Access
   • China Mainland User Friendly
   • Config:
     • set env STORAGE_TYPE to s3 (e.g. STORAGE_TYPE=s3)
     • set env S3_ACCESS_KEY to your AWS Access Key ID
     • set env S3_SECRET_KEY to your AWS Secret Access Key
     • set env S3_BUCKET to your AWS S3 Bucket Name
     • set env S3_REGION to your AWS S3 Region

4. 🔔 Cloudflare R2

   • Free Storage Quota (10GB Storage & Zero Outbound Cost)
   • Support Direct URL Access
   • Config (S3 Compatible):
     • set env STORAGE_TYPE to s3 (e.g. STORAGE_TYPE=s3)
     • set env S3_ACCESS_KEY to your Cloudflare R2 Access Key ID
     • set env S3_SECRET_KEY to your Cloudflare R2 Secret Access Key
     • set env S3_BUCKET to your Cloudflare R2 Bucket Name
     • set env S3_DOMAIN to your Cloudflare R2 Domain Name (e.g. https://<account-id>.r2.cloudflarestorage.com)
     • set env S3_DIRECT_URL_DOMAIN to your Cloudflare R2 Public URL Access Domain Name (Open Public URL Access, e.g. https://pub-xxx.r2.dev)

5. 📦 Min IO

   • Self Hosted
   • Reliable & Flexible Storage
   • Config (S3 Compatible):
     • set env STORAGE_TYPE to s3 (e.g. STORAGE_TYPE=s3)
     • set env S3_SIGN_VERSION to s3v4 (e.g. S3_SIGN_VERSION=s3v4)
     • set env S3_ACCESS_KEY to your Min IO Access Key ID
     • set env S3_SECRET_KEY to your Min IO Secret Access Key
     • set env S3_BUCKET to your Min IO Bucket Name
     • set env S3_DOMAIN to your Min IO Domain Name (e.g. https://oss.example.com)
     • [Optional] If you are using CDN, you can set S3_DIRECT_URL_DOMAIN to your Min IO Public URL Access Domain Name (e.g. https://cdn-hk.example.com)

6. ❤ Telegram CDN

   • Free Storage (Rate Limit)
   • Support Direct URL Access (China Mainland User Unfriendly)
   • Limited File Type & Format
   • Config:
     • set env STORAGE_TYPE to tg (e.g. STORAGE_TYPE=tg)
     • set env TG_ENDPOINT to your TG-STATE Endpoint (e.g. TG_ENDPOINT=https://tgstate.vercel.app)
     • [Optional] if you are using password authentication, you can set TG_PASSWORD to your TG-STATE Password

4 🔍 OCR Config (Optional)

[!NOTE] OCR Support is based on 👉 PaddleOCR API (✔ Self Hosted ✔ Open Source)

• OCR_ENDPOINT Paddle OCR Endpoint
  • *e.g.: http://example.com:8000

Common Errors

• Cannot Use Save All Options Without Storage Config:
  • This error occurs when you enable save_all option without storage config. You need to set STORAGE_TYPE to local or other storage type to use this option.
• Trying to upload image with Vision disabled. Enable Vision or OCR to process image:
  • This error occurs when you disable enable_vision and enable_ocr at the same time. You need to enable at least one of them to process image files.
• .ppt files are not supported, only .pptx files are supported:
  • This error occurs when you upload a old version of Office PowerPoint file. You need to convert it to .pptx format to process it.
• .doc files are not supported, only .docx files are supported:
  • This error occurs when you upload a old version of Office Word file. You need to convert it to .docx format to process it.
• File Size Limit Exceeded:
  • This error occurs when you upload a file that exceeds the MAX_FILE_SIZE limit. You need to reduce the file size to upload it.