Unofficial Paperbnd/Popfeed plugin for KOReader
initial working version
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CLAUDE.md
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CLAUDE.md
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# Paperbnd KOReader Plugin
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A KOReader plugin for syncing reading progress to an AT Protocol PDS using the Popfeed List Item lexicon.
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## Overview
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Paperbnd allows KOReader users to sync their reading progress to their AT Protocol Personal Data Server (PDS) via the Popfeed social reading platform. The plugin tracks page progress and synchronizes it with existing Popfeed book entries.
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## Architecture
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The plugin consists of two main components:
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### 1. XRPC Client (`xrpc.lua`)
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A dedicated module for AT Protocol/XRPC communication that handles:
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- **Generic XRPC method invocation** with support for GET and POST requests
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- **PDS resolution** via the Slingshot service (Microcosm)
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- **Advanced session management** with multi-level token renewal and automatic retry
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- **Authentication** using handle and app password
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- **Record operations** (list, get, put) for AT Protocol collections
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**Key Features:**
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- Table-based parameters for flexibility (method, params, body, pds, skip_renewal)
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- Multi-level session renewal: refresh token → app password fallback → automatic retry
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- Session validation on plugin startup to proactively renew expired tokens
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- Authorization headers only on POST requests (GET requests never authenticated)
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- Callback support for persisting refreshed tokens to plugin settings
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- Handles both 401 and 400 "expired" errors as authentication failures
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- Prevents infinite recursion during renewal with `skip_renewal` flag
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### 2. Main Plugin (`main.lua`)
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The primary plugin file that integrates with KOReader:
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- **Settings management** with persistent storage of credentials and book mappings
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- **Authentication flow** with two-step credential input (handle, then app password)
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- **Book linking** allows users to select from their existing Popfeed list items
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- **Progress sync** tracks current page, total pages, and percentage
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- **Document hooks** for automatic sync on document close
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- **Menu integration** with conditional menu items based on authentication state
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## User Workflow
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1. **Set Credentials**: User enters their AT Protocol handle and app password
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- Plugin resolves PDS URL via Slingshot service
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- Creates session and stores access/refresh tokens
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2. **Link Book**: User selects current document and links it to an existing Popfeed book
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- Fetches user's list items from their PDS
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- Filters for books only
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- Stores mapping between document path and list item rkey
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3. **Sync Progress**: Reading progress is synchronized automatically
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- Updates `bookProgress` field with current page, total pages, and percentage
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- Updates `listType` to "currently_reading_books" if needed
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- Can be triggered manually or automatically on document close
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4. **Session Management**: Tokens are automatically renewed with multi-level fallback
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- Session validated at plugin startup to ensure fresh tokens
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- Authentication errors (401 or 400 "expired") trigger automatic renewal
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- First attempts refresh with refresh token
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- Falls back to creating new session with app password if refresh token expired
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- Original request automatically retried after successful renewal
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- New tokens saved to settings transparently via callback
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- No user intervention required at any point
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## Technical Details
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### Lexicons Used
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- `social.popfeed.feed.listItem` - Individual book entries with progress tracking
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- `social.popfeed.feed.list` - Reading lists (e.g., "currently_reading_books")
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- `com.atproto.server.createSession` - Initial authentication
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- `com.atproto.server.refreshSession` - Token refresh
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- `com.atproto.repo.listRecords` - Fetch book collections
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- `com.atproto.repo.getRecord` - Fetch individual book records
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- `com.atproto.repo.putRecord` - Update book records with progress
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### Data Storage
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Settings are persisted in `paperbnd.lua` within KOReader's settings directory:
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- Handle and app password
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- PDS URL
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- Access and refresh tokens
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- User DID (Decentralized Identifier)
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- Document-to-listItem mappings (document path -> {rkey, title, author})
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### Book Progress Format
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```lua
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bookProgress = {
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status = "in_progress",
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percent = 42, -- Calculated percentage
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currentPage = 150, -- From KOReader document stats
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totalPages = 357, -- From KOReader document stats
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updatedAt = "2025-10-20T14:30:00.000Z" -- ISO 8601 timestamp
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}
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```
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## Design Decisions
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### Simplicity First
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- Single-file XRPC client for clean separation of concerns
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- No future feature speculation - only implemented what's needed
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- Direct and straightforward code without unnecessary abstractions
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### User Book Selection
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Rather than attempting to match books by ISBN or title, users manually link documents to existing Popfeed list items. This approach:
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- Avoids complex ISBN DB API integration
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- Ensures accuracy (user confirms the correct book)
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- Works with any book format supported by KOReader
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- Leverages existing Popfeed records as the source of truth
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### Advanced Session Management
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The plugin implements a sophisticated multi-level session management system:
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**Automatic Renewal Flow:**
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1. Authentication error detected (401 or 400 "expired")
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2. Attempt to refresh using refresh token
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3. If refresh token expired, create new session with stored app password
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4. If renewal successful, retry the original request automatically
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5. Save new tokens to persistent storage via callback
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**Session Validation:**
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- Session checked at plugin startup
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- Proactively renews expired tokens before user operations
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- Prevents mid-operation authentication failures
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**Benefits:**
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- No manual "Refresh Session" button needed
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- Tokens can expire for weeks without user intervention
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- Original requests automatically retried after renewal
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- Seamless user experience without interruptions
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- Callback mechanism keeps plugin and XRPC client in sync
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### Authentication Strategy
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- Uses Slingshot service to resolve PDS from handle (no manual PDS entry)
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- App passwords for security (no main account passwords stored)
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- Refresh tokens enable long-lived sessions without re-authentication
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## Implementation Notes
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### Reference Implementation
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Built by studying the ReadwiseReader KOReader plugin for:
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- Plugin structure and initialization patterns
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- UI component creation (menus, dialogs, input forms)
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- HTTP request handling with `socket.http` and `ltn12`
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- JSON encoding/decoding with `rapidjson`
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- Settings persistence with `LuaSettings`
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- Document metadata access and event hooks
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### AT Protocol Specifics
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- GET requests never require authentication headers
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- POST requests use Bearer token authentication
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- Refresh tokens are used as access tokens for the refresh endpoint
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- Both access and refresh tokens are rotated on each refresh
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- Session validation uses `com.atproto.server.getSession` endpoint
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- Authentication errors can return 401 or 400 with "expired" message
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### Error Handling
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- User-friendly error messages via `InfoMessage` widgets
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- Graceful degradation when operations fail
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- Network errors handled with appropriate fallbacks
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## Code Quality Assessment
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**Current State (January 2025):**
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The codebase is well-structured and production-ready with the following characteristics:
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**Strengths:**
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- Clean separation of concerns (XRPC client vs. plugin logic)
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- Comprehensive error handling with user-friendly messages
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- Robust session management with multiple fallback mechanisms
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- Proper state synchronization between components via callbacks
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- No memory leaks or blocking operations
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- Defensive programming with validation at critical points
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- Clear function naming and logical organization
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**Architecture:**
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- **XRPC Client (299 lines)**: Self-contained networking layer with 11 public methods
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- **Main Plugin (447 lines)**: UI integration with 17 public methods
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- **Metadata (5 lines)**: KOReader plugin manifest
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- **Total**: ~750 lines of well-documented Lua code
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**Known Limitations:**
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- One TODO at `main.lua:415` for updating `listUri` when changing reading status
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- Session validation at startup runs synchronously (could be async but startup is fast enough)
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- No retry logic for network failures (only authentication failures)
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- No offline queuing (by design, for simplicity)
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**Testing Considerations:**
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- Manual testing required (KOReader plugin environment)
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- Test scenarios: expired access token, expired refresh token, network errors
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- Edge cases: malformed responses, missing credentials, unlinked books
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## Future Enhancements (Not Implemented)
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Potential features intentionally left out for simplicity:
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- Automatic book detection via ISBN
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- Batch syncing multiple books
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- Conflict resolution for concurrent edits
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- Offline queue for syncing when network unavailable
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- Automatic list URI updates when changing reading status (see TODO in code)
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- Retry logic for transient network failures
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- Progress indicators for long-running operations
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## Files
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- `main.lua` - Main plugin with UI and KOReader integration
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- `xrpc.lua` - XRPC client for AT Protocol communication
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- `CLAUDE.md` - This documentation file
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## Session Management Implementation Details
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The advanced session management system is the core reliability feature of this plugin:
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### XRPCClient Methods (xrpc.lua)
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**`validateSession()`** (`xrpc.lua:229-242`)
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- Makes lightweight test request to verify token validity
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- Returns boolean success status
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- Uses `skip_renewal` flag to prevent recursion
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- Called at plugin startup to proactively renew tokens
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**`refreshSession()`** (`xrpc.lua:245-277`)
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- Swaps access token with refresh token temporarily
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- Calls `com.atproto.server.refreshSession` endpoint
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- Restores old token on failure
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- Notifies plugin of new tokens via callback
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- Returns new session or error
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**`renewSession()`** (`xrpc.lua:280-303`)
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- Multi-level fallback coordinator
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- Level 1: Attempts `refreshSession()`
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- Level 2: Falls back to `createSession()` with app password
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- Returns boolean success and error message
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- Central method called by `call()` on auth errors
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**`call()`** (`xrpc.lua:52-176`)
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- Generic XRPC request handler
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- Detects auth errors (401 or 400 "expired")
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- Calls `renewSession()` on auth failure
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- Rebuilds request with new authorization header
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- Retries original request after successful renewal
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- Single point of entry for all XRPC operations
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### Main Plugin Integration (main.lua)
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**Initialization** (`main.lua:17-51`)
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- Loads credentials from persistent storage
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- Configures XRPC client with tokens and app password
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- Sets callback for automatic token persistence
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- Triggers startup session validation
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**Token Callback** (`main.lua:64-68`)
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- Receives new tokens from XRPC client
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- Saves to plugin settings immediately
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- Ensures credentials never get out of sync
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**Startup Validation** (`main.lua:70-80`)
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- Runs `validateSession()` when plugin loads
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- Silent operation (no user-visible errors)
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- Ensures tokens are fresh before first use
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### Flow Example
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User syncs progress with expired access token:
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1. `syncProgress()` calls `xrpc:putRecord()`
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2. `putRecord()` calls `call()` with POST body
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3. Server returns 401 Unauthorized
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4. `call()` detects auth error, calls `renewSession()`
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5. `renewSession()` tries `refreshSession()`
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6. If refresh token valid: new tokens received, callback fired
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7. If refresh token expired: `createSession()` with app password
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8. `call()` rebuilds request with new access token
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9. `call()` retries POST request
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10. Request succeeds, progress synced
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11. User sees success message, unaware of token renewal
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## Development
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The plugin was developed collaboratively with Claude (Anthropic's AI assistant) with these priorities:
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- Clean, readable code
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- Comprehensive error handling
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- User experience focused on simplicity
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- No emojis in documentation or messages
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- Direct communication style in code comments
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- Proactive reliability through startup validation
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README.md
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README.md
···
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# paperbnd.koplugin
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A [KOReader] plugin for syncing your reading progress to [Paperbnd]/[Popfeed].
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This plugin associates a document in KOReader with a
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`social.popfeed.feed.listItem` record in your Atproto PDS, and then enables
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you to update that record with your reading progress at the press of a button.
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Some limitations:
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- [ ] Progress is only updated when you close the document or press "Sync progress now"
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- [ ] Books must already be in a `currently_reading_books` list
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- [ ] Books must be added to your account from the Paperbnd website or Popfeed website/app before they can be linked
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- [ ] There is no offline queueing; updates while offline will error
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## Installation
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1. Download/clone this repository
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2. Drag the `paperbnd.koplugin` folder into your KOReader plugins directory
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3. Restart KOReader
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## Usage
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1. Create an App Password wherever your Atproto account is managed (Bluesky, Tangled, elsewhere)
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2. Open the KOReader menu
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3. Navigate to the second page of the first tab
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4. Select the "Paperbnd" option
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5. Select "Set credentials"
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6. Enter your Handle and App Password when prompted
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7. Select "Link current book"
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8. Select your book from the list
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9. From the Paperbnd menu, select "Sync progress now"
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[Paperbnd]: https://paperbnd.club/
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[Popfeed]: https://popfeed.social/
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[KOReader]: https://koreader.rocks/
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_meta.lua
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_meta.lua
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main.lua
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main.lua
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local DataStorage = require("datastorage")
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local InfoMessage = require("ui/widget/infomessage")
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local InputDialog = require("ui/widget/inputdialog")
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local LuaSettings = require("luasettings")
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local UIManager = require("ui/uimanager")
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local WidgetContainer = require("ui/widget/container/widgetcontainer")
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local _ = require("gettext")
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local T = require("ffi/util").template
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local XRPCClient = require("xrpc")
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local Paperbnd = WidgetContainer:extend {
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name = "paperbnd",
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is_doc_only = false,
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}
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function Paperbnd:init()
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self.ui.menu:registerToMainMenu(self)
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-- Load settings
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self.settings = LuaSettings:open(DataStorage:getSettingsDir() .. "/paperbnd.lua")
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self.handle = self.settings:readSetting("handle")
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self.app_password = self.settings:readSetting("app_password")
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self.pds_url = self.settings:readSetting("pds_url")
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self.access_token = self.settings:readSetting("access_token")
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self.refresh_token = self.settings:readSetting("refresh_token")
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self.did = self.settings:readSetting("did")
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self.document_mappings = self.settings:readSetting("document_mappings") or {}
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-- Initialize XRPC client
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self.xrpc = XRPCClient:new()
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if self.pds_url then
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self.xrpc:setPDS(self.pds_url)
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end
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if self.access_token then
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self.xrpc:setAuth(self.access_token, self.refresh_token)
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end
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if self.handle and self.app_password then
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self.xrpc:setCredentials(self.handle, self.app_password)
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end
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-- Set up callback for credential updates
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self.xrpc:setCredentialsCallback(function(access_token, refresh_token)
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self:onTokenRefresh(access_token, refresh_token)
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end)
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-- Validate session at startup if we have credentials
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if self:isAuthenticated() then
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self:validateSessionAtStartup()
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end
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end
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function Paperbnd:saveSettings()
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self.settings:saveSetting("handle", self.handle)
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self.settings:saveSetting("app_password", self.app_password)
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self.settings:saveSetting("pds_url", self.pds_url)
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self.settings:saveSetting("access_token", self.access_token)
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self.settings:saveSetting("refresh_token", self.refresh_token)
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self.settings:saveSetting("did", self.did)
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self.settings:saveSetting("document_mappings", self.document_mappings)
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self.settings:flush()
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end
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function Paperbnd:onTokenRefresh(access_token, refresh_token)
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self.access_token = access_token
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self.refresh_token = refresh_token
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self:saveSettings()
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end
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function Paperbnd:validateSessionAtStartup()
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-- Validate session asynchronously to avoid blocking plugin startup
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-- This will trigger automatic renewal if the session is expired
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local valid, err = self.xrpc:validateSession()
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if not valid then
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-- Session validation failed, but renewSession will be called
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-- automatically on the next authenticated request
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-- No need to show error to user at startup
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end
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end
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function Paperbnd:addToMainMenu(menu_items)
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menu_items.paperbnd = {
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text = _("Paperbnd"),
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sub_item_table = {
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{
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text = _("Set credentials"),
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keep_menu_open = true,
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callback = function()
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self:setCredentials()
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end,
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},
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{
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text = _("Link current book"),
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enabled_func = function()
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return self:isAuthenticated() and self.ui.document ~= nil
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end,
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callback = function()
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self:linkCurrentBook()
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end,
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},
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{
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text = _("Sync progress now"),
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enabled_func = function()
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return self:isAuthenticated() and self:isCurrentBookLinked()
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end,
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callback = function()
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self:syncProgress()
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end,
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},
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{
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text = _("Unlink current book"),
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enabled_func = function()
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return self:isCurrentBookLinked()
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end,
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callback = function()
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self:unlinkCurrentBook()
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end,
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},
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},
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}
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end
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function Paperbnd:isAuthenticated()
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return self.handle ~= nil and self.access_token ~= nil and self.did ~= nil
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end
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function Paperbnd:getCurrentDocumentPath()
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if self.ui.document then
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return self.ui.document.file
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end
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return nil
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end
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function Paperbnd:isCurrentBookLinked()
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local doc_path = self:getCurrentDocumentPath()
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return doc_path ~= nil and self.document_mappings[doc_path] ~= nil
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end
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function Paperbnd:setCredentials()
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local handle_input
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handle_input = InputDialog:new {
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title = _("Enter your handle"),
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input = self.handle or "",
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buttons = {
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{
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{
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text = _("Cancel"),
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callback = function()
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UIManager:close(handle_input)
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end,
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},
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{
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text = _("Next"),
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is_enter_default = true,
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callback = function()
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local handle = handle_input:getInputText()
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UIManager:close(handle_input)
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if handle and handle ~= "" then
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self:setAppPassword(handle)
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end
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end,
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},
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},
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},
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}
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UIManager:show(handle_input)
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handle_input:onShowKeyboard()
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end
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function Paperbnd:setAppPassword(handle)
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local password_input
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password_input = InputDialog:new {
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title = _("Enter your app password"),
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input = self.app_password or "",
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text_type = "password",
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buttons = {
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{
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{
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text = _("Cancel"),
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callback = function()
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UIManager:close(password_input)
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end,
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},
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{
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text = _("Login"),
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is_enter_default = true,
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callback = function()
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local password = password_input:getInputText()
191
+
UIManager:close(password_input)
192
+
193
+
if password and password ~= "" then
194
+
self:authenticate(handle, password)
195
+
end
196
+
end,
197
+
},
198
+
},
199
+
},
200
+
}
201
+
UIManager:show(password_input)
202
+
password_input:onShowKeyboard()
203
+
end
204
+
205
+
function Paperbnd:authenticate(handle, password)
206
+
UIManager:show(InfoMessage:new {
207
+
text = _("Authenticating..."),
208
+
timeout = 1,
209
+
})
210
+
211
+
-- Resolve PDS
212
+
local pds_url, err = self.xrpc:resolvePDS(handle)
213
+
if err then
214
+
UIManager:show(InfoMessage:new {
215
+
text = T(_("Failed to resolve PDS: %1"), err),
216
+
})
217
+
return
218
+
end
219
+
220
+
self.pds_url = pds_url
221
+
self.xrpc:setPDS(pds_url)
222
+
223
+
-- Create session
224
+
local session, err = self.xrpc:createSession(handle, password)
225
+
if err then
226
+
UIManager:show(InfoMessage:new {
227
+
text = T(_("Authentication failed: %1"), err),
228
+
})
229
+
return
230
+
end
231
+
232
+
self.handle = handle
233
+
self.app_password = password
234
+
self.access_token = session.accessJwt
235
+
self.refresh_token = session.refreshJwt
236
+
self.did = session.did
237
+
238
+
-- Store credentials in XRPC client for automatic session renewal
239
+
self.xrpc:setCredentials(handle, password)
240
+
241
+
self:saveSettings()
242
+
243
+
UIManager:show(InfoMessage:new {
244
+
text = _("Authentication successful!"),
245
+
})
246
+
end
247
+
248
+
function Paperbnd:linkCurrentBook()
249
+
if not self:isAuthenticated() then
250
+
UIManager:show(InfoMessage:new {
251
+
text = _("Please set credentials first"),
252
+
})
253
+
return
254
+
end
255
+
256
+
UIManager:show(InfoMessage:new {
257
+
text = _("Fetching your books..."),
258
+
timeout = 1,
259
+
})
260
+
261
+
-- Fetch list items
262
+
local response, err = self.xrpc:listRecords(
263
+
self.did,
264
+
"social.popfeed.feed.listItem",
265
+
100,
266
+
nil
267
+
)
268
+
269
+
if err then
270
+
UIManager:show(InfoMessage:new {
271
+
text = T(_("Failed to fetch books: %1"), err),
272
+
})
273
+
return
274
+
end
275
+
276
+
277
+
if not response.records or #response.records == 0 then
278
+
UIManager:show(InfoMessage:new {
279
+
text = _("No books found in your account"),
280
+
})
281
+
return
282
+
end
283
+
284
+
-- Filter for books only
285
+
local books = {}
286
+
for _, record in ipairs(response.records) do
287
+
if record.value and record.value.creativeWorkType == "book" and record.value.listType == "currently_reading_books" then
288
+
table.insert(books, {
289
+
title = record.value.title or "Unknown",
290
+
author = record.value.mainCredit or "Unknown",
291
+
rkey = record.uri:match("([^/]+)$"),
292
+
record = record.value,
293
+
})
294
+
end
295
+
end
296
+
297
+
298
+
if #books == 0 then
299
+
UIManager:show(InfoMessage:new {
300
+
text = _("No books found in your account"),
301
+
})
302
+
return
303
+
end
304
+
305
+
-- Show selection dialog
306
+
self:showBookSelectionDialog(books)
307
+
end
308
+
309
+
function Paperbnd:showBookSelectionDialog(books)
310
+
local Menu = require("ui/widget/menu")
311
+
local Screen = require("device").screen
312
+
313
+
local items = {}
314
+
for _, book in ipairs(books) do
315
+
table.insert(items, {
316
+
text = book.title,
317
+
subtitle = book.author,
318
+
book = book,
319
+
})
320
+
end
321
+
322
+
local book_menu = Menu:new {
323
+
title = _("Select a book"),
324
+
item_table = items,
325
+
width = Screen:getWidth() - Screen:scaleBySize(100),
326
+
height = Screen:getHeight() - Screen:scaleBySize(100),
327
+
fullscreen = true,
328
+
single_line = false,
329
+
onMenuSelect = function(menu, item)
330
+
self:confirmLinkBook(item.book)
331
+
end,
332
+
}
333
+
334
+
UIManager:show(book_menu)
335
+
end
336
+
337
+
function Paperbnd:confirmLinkBook(book)
338
+
local doc_path = self:getCurrentDocumentPath()
339
+
if not doc_path then
340
+
return
341
+
end
342
+
343
+
self.document_mappings[doc_path] = {
344
+
rkey = book.rkey,
345
+
title = book.title,
346
+
author = book.author,
347
+
}
348
+
349
+
self:saveSettings()
350
+
351
+
UIManager:show(InfoMessage:new {
352
+
text = T(_("Linked to: %1"), book.title),
353
+
})
354
+
end
355
+
356
+
function Paperbnd:unlinkCurrentBook()
357
+
local doc_path = self:getCurrentDocumentPath()
358
+
if doc_path and self.document_mappings[doc_path] then
359
+
local book_title = self.document_mappings[doc_path].title
360
+
self.document_mappings[doc_path] = nil
361
+
self:saveSettings()
362
+
363
+
UIManager:show(InfoMessage:new {
364
+
text = T(_("Unlinked: %1"), book_title),
365
+
})
366
+
end
367
+
end
368
+
369
+
function Paperbnd:syncProgress()
370
+
if not self:isAuthenticated() then
371
+
return
372
+
end
373
+
374
+
local doc_path = self:getCurrentDocumentPath()
375
+
if not doc_path or not self.document_mappings[doc_path] then
376
+
return
377
+
end
378
+
379
+
local mapping = self.document_mappings[doc_path]
380
+
381
+
-- Get document statistics
382
+
local stats = self.ui.doc_settings:readSetting("stats") or {}
383
+
local pages = self.ui.document:getPageCount()
384
+
local current_page = self.ui.paging and self.ui.paging.current_page or 1
385
+
local percent = math.floor((current_page / pages) * 100)
386
+
387
+
-- Fetch current record
388
+
local record_response, err = self.xrpc:getRecord(
389
+
self.did,
390
+
"social.popfeed.feed.listItem",
391
+
mapping.rkey
392
+
)
393
+
394
+
if err then
395
+
UIManager:show(InfoMessage:new {
396
+
text = T(_("Failed to fetch record: %1"), err),
397
+
})
398
+
return
399
+
end
400
+
401
+
local record = record_response.value
402
+
403
+
-- Update bookProgress
404
+
record.bookProgress = {
405
+
status = "in_progress",
406
+
percent = percent,
407
+
currentPage = current_page,
408
+
totalPages = pages,
409
+
updatedAt = os.date("!%Y-%m-%dT%H:%M:%S.000Z"),
410
+
}
411
+
412
+
-- If not already in currently_reading, update listType
413
+
-- if record.listType ~= "currently_reading_books" then
414
+
-- record.listType = "currently_reading_books"
415
+
-- TODO: Also update the listUri to point to currently_reading list
416
+
-- end
417
+
418
+
-- Put updated record
419
+
local put_response, put_err = self.xrpc:putRecord(
420
+
self.did,
421
+
"social.popfeed.feed.listItem",
422
+
mapping.rkey,
423
+
record
424
+
)
425
+
426
+
if put_err then
427
+
UIManager:show(InfoMessage:new {
428
+
text = T(_("Failed to sync progress: %1"), put_err),
429
+
})
430
+
return
431
+
end
432
+
433
+
UIManager:show(InfoMessage:new {
434
+
text = T(_("Synced: %1% (%2/%3)"), percent, current_page, pages),
435
+
timeout = 2,
436
+
})
437
+
end
438
+
439
+
-- Hook into document close to sync progress
440
+
function Paperbnd:onCloseDocument()
441
+
if self:isAuthenticated() and self:isCurrentBookLinked() then
442
+
self:syncProgress()
443
+
end
444
+
end
445
+
446
+
return Paperbnd
+353
xrpc.lua
+353
xrpc.lua
···
1
+
local http = require("socket.http")
2
+
local url = require("socket.url")
3
+
local ltn12 = require("ltn12")
4
+
local socket = require("socket")
5
+
local socketutil = require("socketutil")
6
+
local rapidjson = require("rapidjson")
7
+
8
+
local XRPCClient = {
9
+
pds_url = nil,
10
+
handle = nil,
11
+
app_password = nil,
12
+
access_token = nil,
13
+
refresh_token = nil,
14
+
timeout = 30,
15
+
on_credentials_updated = nil, -- Callback for when credentials are refreshed
16
+
}
17
+
18
+
function XRPCClient:new(o)
19
+
o = o or {}
20
+
setmetatable(o, self)
21
+
self.__index = self
22
+
return o
23
+
end
24
+
25
+
function XRPCClient:setPDS(pds_url)
26
+
self.pds_url = pds_url
27
+
end
28
+
29
+
function XRPCClient:setAuth(access_token, refresh_token)
30
+
self.access_token = access_token
31
+
if refresh_token then
32
+
self.refresh_token = refresh_token
33
+
end
34
+
end
35
+
36
+
function XRPCClient:setCredentials(handle, app_password)
37
+
self.handle = handle
38
+
self.app_password = app_password
39
+
end
40
+
41
+
function XRPCClient:setCredentialsCallback(callback)
42
+
self.on_credentials_updated = callback
43
+
end
44
+
45
+
-- Notify that credentials were updated
46
+
function XRPCClient:notifyCredentialsUpdated(access_token, refresh_token)
47
+
if self.on_credentials_updated then
48
+
self.on_credentials_updated(access_token, refresh_token)
49
+
end
50
+
end
51
+
52
+
function XRPCClient:call(opts)
53
+
opts = opts or {}
54
+
local method = opts.method
55
+
local params = opts.params
56
+
local body = opts.body
57
+
local skip_renewal = opts.skip_renewal or false
58
+
local pds = opts.pds or self.pds_url
59
+
60
+
if not pds then
61
+
return nil, "PDS URL not set"
62
+
end
63
+
64
+
local endpoint = pds .. "/xrpc/" .. method
65
+
66
+
-- Add query parameters if provided
67
+
if params and next(params) then
68
+
local query_parts = {}
69
+
for k, v in pairs(params) do
70
+
table.insert(query_parts, k .. "=" .. url.escape(tostring(v)))
71
+
end
72
+
endpoint = endpoint .. "?" .. table.concat(query_parts, "&")
73
+
end
74
+
75
+
local request_body = nil
76
+
local source = nil
77
+
local is_post = body ~= nil
78
+
local headers = {
79
+
["Accept"] = "application/json",
80
+
}
81
+
82
+
-- Handle request body (POST only)
83
+
if is_post then
84
+
headers["Content-Type"] = "application/json"
85
+
86
+
-- Add authorization header for POST requests if token is set
87
+
if self.access_token then
88
+
headers["Authorization"] = "Bearer " .. self.access_token
89
+
end
90
+
91
+
local encoded, err = rapidjson.encode(body)
92
+
if err then
93
+
return nil, "Failed to encode JSON: " .. err
94
+
end
95
+
request_body = encoded
96
+
headers["Content-Length"] = tostring(#request_body)
97
+
source = ltn12.source.string(request_body)
98
+
end
99
+
100
+
local sink = {}
101
+
local request = {
102
+
url = endpoint,
103
+
method = is_post and "POST" or "GET",
104
+
sink = ltn12.sink.table(sink),
105
+
source = source,
106
+
headers = headers,
107
+
}
108
+
109
+
socketutil:set_timeout(self.timeout, self.timeout)
110
+
local code, response_headers = socket.skip(1, http.request(request))
111
+
socketutil:reset_timeout()
112
+
113
+
if not code then
114
+
return nil, "HTTP request failed: " .. tostring(response_headers)
115
+
end
116
+
117
+
local response_body = table.concat(sink)
118
+
119
+
-- Handle authentication errors with automatic session renewal
120
+
local is_auth_error = code == 401 or
121
+
(code == 400 and response_body and string.find(string.lower(response_body), "expired"))
122
+
123
+
if is_auth_error and not skip_renewal then
124
+
-- Try to renew session (refresh token -> app password fallback)
125
+
local renewed, renew_err = self:renewSession()
126
+
127
+
if renewed then
128
+
-- Session renewed successfully, retry the original request
129
+
-- Rebuild request with new authorization header
130
+
if is_post and self.access_token then
131
+
headers["Authorization"] = "Bearer " .. self.access_token
132
+
end
133
+
134
+
sink = {}
135
+
request.sink = ltn12.sink.table(sink)
136
+
if is_post then
137
+
request.source = ltn12.source.string(request_body)
138
+
end
139
+
request.headers = headers
140
+
141
+
socketutil:set_timeout(self.timeout, self.timeout)
142
+
code, response_headers = socket.skip(1, http.request(request))
143
+
socketutil:reset_timeout()
144
+
145
+
if not code then
146
+
return nil, "HTTP request failed after session renewal: " .. tostring(response_headers)
147
+
end
148
+
149
+
response_body = table.concat(sink)
150
+
else
151
+
-- Could not renew session
152
+
return nil, "Session expired and renewal failed: " .. (renew_err or "unknown error")
153
+
end
154
+
end
155
+
156
+
-- Handle non-200 responses
157
+
if code ~= 200 then
158
+
local error_msg
159
+
if response_body and response_body ~= "" then
160
+
local error_data, err = rapidjson.decode(response_body)
161
+
if error_data and error_data.message then
162
+
error_msg = error_data.message
163
+
else
164
+
error_msg = response_body
165
+
end
166
+
else
167
+
error_msg = "HTTP " .. code
168
+
end
169
+
170
+
return nil, error_msg
171
+
end
172
+
173
+
-- Decode response
174
+
if response_body and response_body ~= "" then
175
+
local decoded, err = rapidjson.decode(response_body)
176
+
if err then
177
+
return nil, "Failed to decode JSON response: " .. err
178
+
end
179
+
return decoded, nil
180
+
end
181
+
182
+
return {}, nil
183
+
end
184
+
185
+
-- Resolve PDS from handle using Slingshot service
186
+
function XRPCClient:resolvePDS(handle)
187
+
local response, err = self:call({
188
+
method = "com.bad-example.identity.resolveMiniDoc",
189
+
params = { identifier = handle },
190
+
pds = "https://slingshot.microcosm.blue",
191
+
})
192
+
193
+
if err or not response then
194
+
return nil, "Failed to resolve PDS for handle: " .. err
195
+
end
196
+
197
+
if not response.pds then
198
+
return nil, "Invalid response from Slingshot service"
199
+
end
200
+
201
+
return response.pds, nil
202
+
end
203
+
204
+
-- Create session (login)
205
+
function XRPCClient:createSession(identifier, password)
206
+
local response, err = self:call({
207
+
method = "com.atproto.server.createSession",
208
+
body = {
209
+
identifier = identifier,
210
+
password = password,
211
+
},
212
+
skip_renewal = true, -- Don't auto-renew during initial login
213
+
})
214
+
215
+
if err or not response then
216
+
return nil, err
217
+
end
218
+
219
+
if response.accessJwt then
220
+
self:setAuth(response.accessJwt, response.refreshJwt)
221
+
-- Note: We don't call notifyCredentialsUpdated here since the caller
222
+
-- of createSession is expected to handle storing credentials
223
+
end
224
+
225
+
return response, nil
226
+
end
227
+
228
+
-- Validate current session by making a test request
229
+
function XRPCClient:validateSession()
230
+
if not self.access_token then
231
+
return false, "No access token"
232
+
end
233
+
234
+
-- Make a lightweight request to check if session is valid
235
+
local response, err = self:call({
236
+
method = "com.atproto.server.getSession",
237
+
body = {},
238
+
skip_renewal = true, -- Don't auto-renew during validation
239
+
})
240
+
241
+
return response ~= nil, err
242
+
end
243
+
244
+
-- Refresh session using refresh token
245
+
function XRPCClient:refreshSession()
246
+
if not self.refresh_token then
247
+
return nil, "No refresh token available"
248
+
end
249
+
250
+
-- Temporarily store the current access token
251
+
local old_access_token = self.access_token
252
+
253
+
-- Use refresh token for this request
254
+
self.access_token = self.refresh_token
255
+
256
+
local response, err = self:call({
257
+
method = "com.atproto.server.refreshSession",
258
+
body = {},
259
+
skip_renewal = true, -- Don't recurse during refresh
260
+
})
261
+
262
+
if err or not response then
263
+
-- Restore old access token on failure
264
+
self.access_token = old_access_token
265
+
return nil, err
266
+
end
267
+
268
+
-- Update tokens with new values
269
+
if response.accessJwt then
270
+
self:setAuth(response.accessJwt, response.refreshJwt)
271
+
self:notifyCredentialsUpdated(response.accessJwt, response.refreshJwt)
272
+
end
273
+
274
+
return response, nil
275
+
end
276
+
277
+
-- Renew session with multi-level fallback
278
+
-- 1. Try to use refresh token
279
+
-- 2. If refresh token expired, create new session with app password
280
+
function XRPCClient:renewSession()
281
+
-- First, try to refresh with refresh token
282
+
local response, err = self:refreshSession()
283
+
284
+
if response then
285
+
return true, nil
286
+
end
287
+
288
+
-- If refresh failed and we have app password, try to create new session
289
+
if self.handle and self.app_password then
290
+
local session, session_err = self:createSession(self.handle, self.app_password)
291
+
292
+
if session then
293
+
-- New session created successfully, tokens already set by createSession
294
+
self:notifyCredentialsUpdated(session.accessJwt, session.refreshJwt)
295
+
return true, nil
296
+
end
297
+
298
+
return false, "Failed to refresh session and create new session: " .. (session_err or "unknown error")
299
+
end
300
+
301
+
return false,
302
+
"Failed to refresh session: " .. (err or "unknown error") .. ", and no app password available for fallback"
303
+
end
304
+
305
+
-- List records from a collection
306
+
function XRPCClient:listRecords(repo, collection, limit, cursor)
307
+
local params = {
308
+
repo = repo,
309
+
collection = collection,
310
+
}
311
+
312
+
if limit then
313
+
params.limit = limit
314
+
end
315
+
316
+
if cursor then
317
+
params.cursor = cursor
318
+
end
319
+
320
+
return self:call({
321
+
method = "com.atproto.repo.listRecords",
322
+
params = params,
323
+
})
324
+
end
325
+
326
+
-- Get a single record
327
+
function XRPCClient:getRecord(repo, collection, rkey)
328
+
local params = {
329
+
repo = repo,
330
+
collection = collection,
331
+
rkey = rkey,
332
+
}
333
+
334
+
return self:call({
335
+
method = "com.atproto.repo.getRecord",
336
+
params = params,
337
+
})
338
+
end
339
+
340
+
-- Put (create or update) a record
341
+
function XRPCClient:putRecord(repo, collection, rkey, record)
342
+
return self:call({
343
+
method = "com.atproto.repo.putRecord",
344
+
body = {
345
+
repo = repo,
346
+
collection = collection,
347
+
rkey = rkey,
348
+
record = record,
349
+
},
350
+
})
351
+
end
352
+
353
+
return XRPCClient