project: write simple backend program for now

Author: ksauraj

.gitignore

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+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+*.test
+*.out
+
+# Output of the go coverage tool
+*.out
+
+# Config files containing secrets
+rclone.conf
+*.bak
+
+# Dependency directories
+vendor/
+
+# Environment files
+.env
+.env.local
+
+# Go workspace file
+go.work
+
+# Temporary files
+*.tmp
+
+# IDE specific files
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Vercel
+.vercel

LICENSE

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+MIT License
+
+Copyright (c) 2025 Sauraj Kumar Singh
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# OneDrive Upload API
+
+A serverless API service for uploading files to OneDrive with support for multiple remote configurations.
+
+## API Endpoint
+
+### POST /upload
+
+Upload a file to OneDrive.
+
+**Request Format:**
+- Content-Type: `multipart/form-data`
+
+**Form Fields:**
+- `file`: (required) The file to upload
+- `remote`: (required) Remote configuration to use (`hakimionedrive`, `oned`, or `saurajcf`)
+- `remoteFolder`: (optional) Folder path in OneDrive where the file should be uploaded
+- `remoteFileName`: (optional) Custom name for the uploaded file
+- `chunkSize`: (required) Upload chunk size in MB (2, 4, 8, or 16)
+
+**Success Response:**
+```json
+{
+    "status": "success",
+    "message": "File uploaded successfully",
+    "downloadURL": "https://your-index.vercel.app/path/to/file",
+    "fileSize": 1234567,
+    "fileName": "example.pdf"
+}
+```
+
+**Error Response:**
+```json
+{
+    "error": "Error message here",
+    "details": "Detailed error information"
+}
+```
+
+## Deployment
+
+### Prerequisites
+1. OneDrive API credentials in rclone.conf
+2. Vercel account and Vercel CLI installed
+
+### Deploy to Vercel
+
+1. Clone this repository
+```bash
+git clone https://github.com/ksauraj/ksau-oned-api.git
+cd ksau-oned-api
+```
+
+2. Add your rclone.conf file to the project root
+
+3. Deploy to Vercel
+```bash
+vercel
+```
+
+### Local Development
+
+1. Clone the repository and add your rclone.conf file
+
+2. Start the development server
+```bash
+go run main.go
+```
+
+The server will start on http://localhost:8080 with the following endpoint:
+- Upload endpoint: http://localhost:8080/upload
+
+## Configuration
+
+The API supports multiple OneDrive remotes which are configured in the code:
+
+```go
+var rootFolders = map[string]string{
+    "hakimionedrive": "Public",
+    "oned":           "",
+    "saurajcf":       "MY_BOMT_STUFFS",
+}
+
+var baseURLs = map[string]string{
+    "hakimionedrive": "https://onedrive-vercel-index-kohl-eight-30.vercel.app",
+    "oned":           "https://index.sauraj.eu.org",
+    "saurajcf":       "https://my-index-azure.vercel.app",
+}
+```
+
+## Error Handling and Logging
+
+The API includes comprehensive error handling and logging:
+- Request validation with detailed error messages
+- File size and type validation
+- Detailed logging of upload process
+- Proper cleanup of temporary files
+- Memory limits to prevent server overload
+
+## Security
+
+- The API uses CORS headers to allow requests from any origin
+- Request size limits and validations are in place
+- Proper cleanup of temporary files
+- Keep your rclone.conf secure and never commit it to version control
+
+## License
+
+See [LICENSE](LICENSE) file for details.