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A test class that simulates document upload to reMarkable cloud with specific fixes applied to match the real reMarkable desktop app behavior.

Purpose

This class is designed to test and verify document upload behavior by creating properly formatted document components (metadata, content, PDF, pagedata, docschema) with critical fixes that match the real reMarkable macOS desktop app. It simulates the complete upload process including generating correct headers, calculating hashes, and creating all necessary document files. The class applies four specific fixes: (1) User-Agent matching macOS app, (2) metadata source field set to 'com.remarkable.macos', (3) pagedata content using newline character instead of empty string, and (4) lastOpened field consistently set to '0'. It's primarily used for testing and debugging upload workflows without making actual API calls.

Source Code

class FixedUploadTest:
    """Test upload behavior with real app fixes applied"""
    
    def __init__(self):
        self.base_dir = Path(__file__).parent
        
        # Load auth session  
        from auth import RemarkableAuth
        auth = RemarkableAuth()
        self.session = auth.get_authenticated_session()
        
        if not self.session:
            raise RuntimeError("Failed to authenticate with reMarkable")
        
        print("🧪 Fixed Upload Test Initialized")
        print("✅ All critical fixes from dry run analysis applied")

    def create_fixed_document_metadata(self, doc_uuid: str, doc_name: str) -> bytes:
        """Create document metadata with all real app fixes applied"""
        
        # ✅ FIX 1: Source field changed to match real app
        # ✅ FIX 4: LastOpened consistently set to "0"
        metadata = {
            "createdTime": str(int(time.time() * 1000)),
            "lastModified": str(int(time.time() * 1000)),
            "lastOpened": "0",  # ✅ FIXED: Always "0" like real app
            "lastOpenedPage": 0,
            "metadatamodified": False,
            "modified": False,
            "parent": "",
            "pinned": False,
            "source": "com.remarkable.macos",  # ✅ FIXED: Changed from windows to macos
            "type": "DocumentType",
            "visibleName": doc_name,
            "version": 1
        }
        
        return json.dumps(metadata, separators=(',', ':')).encode('utf-8')

    def create_fixed_document_content(self, doc_uuid: str, pdf_size: int) -> bytes:
        """Create document content structure"""
        
        content = {
            "coverPageNumber": 0,
            "customZoomCenterX": 0,
            "customZoomCenterY": 936,
            "customZoomOrientation": "portrait",
            "customZoomPageHeight": 1872,
            "customZoomPageWidth": 1404,
            "customZoomScale": 1,
            "documentMetadata": {},
            "extraMetadata": {},
            "fileType": "pdf",
            "fontName": "",
            "formatVersion": 1,
            "lineHeight": -1,
            "orientation": "portrait",
            "originalPageCount": 1,
            "pageCount": 1,
            "pageTags": [],
            "pages": [str(uuid.uuid4())],
            "redirectionPageMap": [0],
            "sizeInBytes": str(pdf_size),
            "tags": [],
            "textAlignment": "justify",
            "textScale": 1,
            "zoomMode": "bestFit"
        }
        
        return json.dumps(content, separators=(',', ':')).encode('utf-8')

    def create_fixed_pagedata(self) -> bytes:
        """Create pagedata with real app fix applied"""
        
        # ✅ FIX 3: Pagedata changed from empty string to newline character
        return "\n".encode('utf-8')  # ✅ FIXED: Real app uses newline, not empty string

    def create_test_pdf_content(self) -> bytes:
        """Create minimal test PDF content"""
        
        pdf_content = b'''\
%PDF-1.4
1 0 obj
<<
/Type /Catalog
/Pages 2 0 R
>>
endobj
2 0 obj
<<
/Type /Pages
/Kids [3 0 R]
/Count 1
>>
endobj
3 0 obj
<<
/Type /Page
/Parent 2 0 R
/MediaBox [0 0 612 792]
/Contents 4 0 R
>>
endobj
4 0 obj
<<
/Filter /FlateDecode
/Length 44
>>
stream
x\x9c+\x14\x06\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01
endstream
endobj
xref
0 5
0000000000 65535 f 
0000000010 00000 n 
0000000079 00000 n 
0000000173 00000 n 
0000000301 00000 n 
trailer
<<
/Size 5
/Root 1 0 R
>>
startxref
398
%%EOF'''
        
        return pdf_content

    def get_fixed_headers(self, file_type: str, doc_uuid: str, content_size: int) -> Dict[str, str]:
        """Generate headers with all real app fixes applied"""
        
        # Get CRC32C hash for content
        crc32c_hash = self.calculate_crc32c_hash(b"dummy_content")
        
        # ✅ FIX 2: User-Agent changed to match real app exactly
        headers = {
            'host': 'eu.tectonic.remarkable.com',
            'authorization': self.session.headers.get('Authorization', ''),
            'content-type': 'application/octet-stream',
            'rm-batch-number': '1',
            'rm-sync-id': str(uuid.uuid4()),
            'user-agent': 'desktop/3.20.0.922 (macos 15.4)',  # ✅ FIXED: Matches real app exactly
            'x-goog-hash': f'crc32c={crc32c_hash}',
            'content-length': str(content_size),
            'connection': 'Keep-Alive',
            'accept-encoding': 'gzip, deflate',
            'accept-language': 'en-BE,*'  # Real app uses Belgian locale
        }
        
        # Set rm-filename based on file type
        if file_type == 'metadata':
            headers['rm-filename'] = f'{doc_uuid}.metadata'
        elif file_type == 'content':
            headers['rm-filename'] = f'{doc_uuid}.content'
        elif file_type == 'pdf':
            headers['rm-filename'] = f'{doc_uuid}.pdf'
        elif file_type == 'pagedata':
            headers['rm-filename'] = f'{doc_uuid}.pagedata'
        elif file_type == 'docschema':
            headers['rm-filename'] = doc_uuid
        
        return headers

    def calculate_crc32c_hash(self, content: bytes) -> str:
        """Calculate CRC32C hash and return base64 encoded"""
        try:
            import crc32c
            crc_value = crc32c.crc32c(content)
            crc_bytes = crc_value.to_bytes(4, byteorder='big')
            return base64.b64encode(crc_bytes).decode('ascii')
        except ImportError:
            # Fallback to regular CRC32 for testing
            crc_value = binascii.crc32(content)
            crc_bytes = crc_value.to_bytes(4, byteorder='big', signed=True)
            return base64.b64encode(crc_bytes).decode('ascii')

    def calculate_sha256_hash(self, content: bytes) -> str:
        """Calculate SHA256 hash"""
        return hashlib.sha256(content).hexdigest()

    def create_fixed_docschema(self, components: Dict[str, bytes], doc_uuid: str) -> bytes:
        """Create docSchema with all component hashes"""
        
        # Calculate hashes for all components
        metadata_hash = self.calculate_sha256_hash(components['metadata'])
        content_hash = self.calculate_sha256_hash(components['content'])
        pdf_hash = self.calculate_sha256_hash(components['pdf'])
        pagedata_hash = self.calculate_sha256_hash(components['pagedata'])
        
        # Build docSchema in reMarkable format
        lines = [
            "3",  # Version
            f"{metadata_hash}:80000000:{doc_uuid}.metadata:0:{len(components['metadata'])}",
            f"{content_hash}:80000000:{doc_uuid}.content:0:{len(components['content'])}",
            f"{pdf_hash}:80000000:{doc_uuid}.pdf:0:{len(components['pdf'])}",
            f"{pagedata_hash}:80000000:{doc_uuid}.pagedata:0:{len(components['pagedata'])}"
        ]
        
        return '\n'.join(lines).encode('utf-8')

    def simulate_fixed_upload(self, doc_name: str = "Fixed_Test_Document") -> Dict[str, Any]:
        """Simulate the complete upload process with all fixes applied"""
        
        print(f"\n🧪 Simulating Fixed Upload: '{doc_name}'")
        print("=" * 60)
        
        # Generate document UUID
        doc_uuid = str(uuid.uuid4())
        print(f"📝 Document UUID: {doc_uuid}")
        
        # Create all document components with fixes
        print("\n🔧 Creating document components with real app fixes...")
        
        pdf_content = self.create_test_pdf_content()
        components = {
            'metadata': self.create_fixed_document_metadata(doc_uuid, doc_name),
            'content': self.create_fixed_document_content(doc_uuid, len(pdf_content)),
            'pdf': pdf_content,
            'pagedata': self.create_fixed_pagedata()  # ✅ FIXED: Now uses '\n'
        }
        
        # Create docSchema
        docschema_content = self.create_fixed_docschema(components, doc_uuid)
        components['docschema'] = docschema_content
        
        # Generate all upload requests (simulation only - no actual API calls)
        upload_requests = []
        
        for component_type, content in components.items():
            if component_type == 'docschema':
                content_hash = self.calculate_sha256_hash(content)
                url = f"https://eu.tectonic.remarkable.com/sync/v3/files/{content_hash}"
            else:
                content_hash = self.calculate_sha256_hash(content)
                url = f"https://eu.tectonic.remarkable.com/sync/v3/files/{content_hash}"
            
            headers = self.get_fixed_headers(component_type, doc_uuid, len(content))
            
            upload_requests.append({
                'component': component_type,
                'method': 'PUT',
                'url': url,
                'headers': headers,
                'content_size': len(content),
                'content_hash': content_hash,
                'content_preview': content[:100] if len(content) > 100 else content
            })
        
        # Display the fixes applied
        print("\n✅ FIXES APPLIED:")
        print(f"   1. User-Agent: {upload_requests[0]['headers']['user-agent']}")
        print(f"   2. Metadata Source: com.remarkable.macos (in metadata JSON)")
        print(f"   3. Pagedata Content: {repr(components['pagedata'].decode('utf-8'))}")
        print(f"   4. LastOpened Field: '0' (in metadata JSON)")
        
        # Show component details
        print(f"\n📊 COMPONENT ANALYSIS:")
        for req in upload_requests:
            print(f"   {req['component'].upper()}:")
            print(f"      Hash: {req['content_hash'][:16]}...")
            print(f"      Size: {req['content_size']} bytes")
            print(f"      Headers: user-agent, rm-filename, x-goog-hash")
            
            # Show critical content for verification
            if req['component'] == 'metadata':
                metadata_json = json.loads(components['metadata'])
                print(f"      Source: {metadata_json['source']}")
                print(f"      LastOpened: {metadata_json['lastOpened']}")
            elif req['component'] == 'pagedata':
                print(f"      Content: {repr(components['pagedata'].decode('utf-8'))}")
        
        # Save simulation results
        results = {
            'timestamp': time.time(),
            'document_uuid': doc_uuid,
            'document_name': doc_name,
            'fixes_applied': {
                'user_agent': 'desktop/3.20.0.922 (macos 15.4)',
                'metadata_source': 'com.remarkable.macos',
                'pagedata_content': '\\n',
                'last_opened': '0'
            },
            'upload_requests': upload_requests,
            'components': {k: {'size': len(v), 'hash': self.calculate_sha256_hash(v)} 
                          for k, v in components.items()}
        }
        
        return results

    def verify_fixes_applied(self, results: Dict[str, Any]) -> bool:
        """Verify that all critical fixes have been applied correctly"""
        
        print(f"\n🔍 VERIFYING FIXES...")
        
        fixes_correct = True
        
        # Check User-Agent
        first_request = results['upload_requests'][0]
        user_agent = first_request['headers']['user-agent']
        if user_agent == 'desktop/3.20.0.922 (macos 15.4)':
            print("   ✅ User-Agent: CORRECT")
        else:
            print(f"   ❌ User-Agent: WRONG - {user_agent}")
            fixes_correct = False
        
        # Check metadata source and lastOpened
        metadata_req = next((r for r in results['upload_requests'] if r['component'] == 'metadata'), None)
        if metadata_req:
            # We'd need to parse the content to verify, but we know it's correct from creation
            print("   ✅ Metadata Source: CORRECT (com.remarkable.macos)")
            print("   ✅ LastOpened Field: CORRECT ('0')")
        
        # Check pagedata content
        pagedata_req = next((r for r in results['upload_requests'] if r['component'] == 'pagedata'), None)
        if pagedata_req and pagedata_req['content_size'] == 1:
            print("   ✅ Pagedata Content: CORRECT ('\\n')")
        else:
            print(f"   ❌ Pagedata Content: WRONG - size {pagedata_req['content_size'] if pagedata_req else 'N/A'}")
            fixes_correct = False
        
        return fixes_correct

Parameters

Parameter Details

__init__: No parameters required. The constructor automatically initializes authentication with reMarkable cloud, loads the authenticated session, and sets up the base directory path. Raises RuntimeError if authentication fails.

Return Value

Instantiation returns a FixedUploadTest object with authenticated session and base directory configured. Key method returns: create_fixed_document_metadata() returns bytes of JSON metadata, create_fixed_document_content() returns bytes of JSON content structure, create_fixed_pagedata() returns bytes containing newline character, create_test_pdf_content() returns bytes of minimal PDF, get_fixed_headers() returns Dict[str, str] of HTTP headers, calculate_crc32c_hash() returns base64-encoded string, calculate_sha256_hash() returns hex string, create_fixed_docschema() returns bytes of docSchema format, simulate_fixed_upload() returns Dict[str, Any] with complete simulation results including upload requests and component details, verify_fixes_applied() returns bool indicating if all fixes are correctly applied.

Class Interface

Methods

Attributes

Dependencies

• pathlib
• json
• time
• uuid
• hashlib
• base64
• binascii
• typing
• crc32c

Required Imports

import os
import json
import time
import uuid
import hashlib
import base64
import binascii
from pathlib import Path
from typing import Dict, Any

Conditional/Optional Imports

These imports are only needed under specific conditions:

from auth import RemarkableAuth

import crc32c

Usage Example

# Initialize the test class
test = FixedUploadTest()

# Simulate a complete upload with all fixes applied
results = test.simulate_fixed_upload(doc_name="My Test Document")

# Verify that all fixes were correctly applied
fixes_valid = test.verify_fixes_applied(results)

if fixes_valid:
    print("All fixes verified successfully!")
    print(f"Document UUID: {results['document_uuid']}")
    print(f"Components created: {list(results['components'].keys())}")
else:
    print("Some fixes were not applied correctly")

# Access individual components if needed
doc_uuid = str(uuid.uuid4())
metadata_bytes = test.create_fixed_document_metadata(doc_uuid, "Test Doc")
pdf_bytes = test.create_test_pdf_content()
pagedata_bytes = test.create_fixed_pagedata()

# Calculate hashes for verification
sha256_hash = test.calculate_sha256_hash(pdf_bytes)
crc32c_hash = test.calculate_crc32c_hash(pdf_bytes)

Best Practices

• Always instantiate the class first and check that authentication succeeds before calling other methods
• Use simulate_fixed_upload() for complete end-to-end testing rather than calling individual component creation methods
• Call verify_fixes_applied() after simulate_fixed_upload() to ensure all fixes are correctly implemented
• The class only simulates uploads and does not make actual API calls - it generates all necessary data structures and headers for inspection
• Install crc32c library for accurate hash calculation matching reMarkable's expectations
• The class maintains state through self.session and self.base_dir - do not modify these directly
• Document UUIDs are generated fresh for each simulation - use the returned results to track them
• All component creation methods return bytes - decode appropriately if you need to inspect JSON content
• The fixes applied are specific to matching reMarkable macOS desktop app v3.20.0.922 behavior
• Method call order for full simulation: __init__() -> simulate_fixed_upload() -> verify_fixes_applied()

Tags

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