Add a new SPFileHandle class to support gzip compression and writing on a background thread, and integrate for SQL import:

 - Implement streaming reading of gzip-compressed files for SQL import
 - Support exporting SQL dumps into a gzip-compressed file
 - SPFileHandle supports the most-used subset of NSFileHandle commands for easy integration
 - Integrate zlib 1.2.4 for improved gzip streaming performance (and support for custom buffer sizes and file offset positions)
This implements Issue #571 .

1 files changed, 2 insertions, 1 deletions

diff --git a/Source/SPConstants.m b/Source/SPConstants.m
index f0d12e51..da9e6b10 100644
--- a/Source/SPConstants.m
+++ b/Source/SPConstants.m
@@ -137,7 +137,7 @@ NSString *SPFavoritesSortedInReverse             = @"FavoritesSortedInReverse";
 NSString *SPPrintWarningRowLimit                 = @"PrintWarningRowLimit";
 NSString *SPDisplayServerVersionInWindowTitle    = @"DisplayServerVersionInWindowTitle";
 
-// Import
+// Import and export
 NSString *SPCSVImportFieldEnclosedBy             = @"CSVImportFieldEnclosedBy";
 NSString *SPCSVImportFieldEscapeCharacter        = @"CSVImportFieldEscapeCharacter";
 NSString *SPCSVImportFieldTerminator             = @"CSVImportFieldTerminator";
@@ -145,6 +145,7 @@ NSString *SPCSVImportFirstLineIsHeader           = @"CSVImportFirstLineIsHeader"
 NSString *SPCSVImportLineTerminator              = @"CSVImportLineTerminator";
 NSString *SPCSVFieldImportMappingAlignment       = @"CSVFieldImportMappingAlignment";
 NSString *SPImportClipboardTempFileNamePrefix    = @"/tmp/_SP_ClipBoard_Import_File_";
+NSString *SPSQLExportUseCompression              = @"SQLExportUseCompression";
 
 // Misc 
 NSString *SPContentFilters                       = @"ContentFilters";