issue-576: Fix SSL uploads corruption when using Unix curl passive mode#663
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Pandiyarajk wants to merge 1 commit into
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issue-576: Fix SSL uploads corruption when using Unix curl passive mode#663Pandiyarajk wants to merge 1 commit into
Pandiyarajk wants to merge 1 commit into
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…ve mode This commit addresses issue giampaolo#576 where Unix curl FTP uploads over SSL/TLS resulted in corrupted zip files. The root cause was premature SSL shutdown during active data transfers. **Problem:** When `OpenSSL.SSL.ZeroReturnError` occurred in `SSLConnection.recv()` during an active file transfer, the connection would immediately close via `super().handle_close()`, causing incomplete file writes and corruption. **Solution:** Modified `SSLConnection.recv()` to defer connection closure when a file transfer is in progress. If `file_obj` exists (indicating active transfer), the method returns `b''` instead of closing the connection immediately. **Changes:** - Modified `SSLConnection.recv()` to check for active file transfers before closing on `SSL.ZeroReturnError` - Added `TLS_DTPHandler.close()` override to ensure proper SSL shutdown - Cleaned up incorrect SSL buffer handling in `FTPHandler.on_file_received()` **Testing:** The fix prevents premature SSL shutdown during file transfers while maintaining proper connection cleanup after transfer completion. This resolves the specific corruption issue reported in giampaolo#576. Note: This addresses the SSL-specific corruption issue. Broader 0-byte transfer problems observed during testing are separate and require additional investigation.
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This commit addresses issue #576 where Unix curl FTP uploads over SSL/TLS resulted in corrupted zip files. The root cause was premature SSL shutdown during active data transfers.
Problem:
When
OpenSSL.SSL.ZeroReturnErroroccurred inSSLConnection.recv()during an active file transfer, the connection would immediately close viasuper().handle_close(), causing incomplete file writes and corruption.Solution:
Modified
SSLConnection.recv()to defer connection closure when a file transfer is in progress. Iffile_objexists (indicating active transfer), the method returnsb''instead of closing the connection immediately.Changes:
SSLConnection.recv()to check for active file transfers before closing onSSL.ZeroReturnErrorTLS_DTPHandler.close()override to ensure proper SSL shutdownFTPHandler.on_file_received()Testing:
The fix prevents premature SSL shutdown during file transfers while maintaining proper connection cleanup after transfer completion. This resolves the specific corruption issue reported in #576.
Note: This addresses the SSL-specific corruption issue. Broader 0-byte transfer problems observed during testing are separate and require additional investigation.