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Zipper
- !!NEWS FLASH!!
- 3068 Error with zZipFiles
- Error 10 Write Error on Zip File
- Finding Zip Uncompressed File Size
- Getting a List of Files in a Zip Archive
- How Update Works
- ItemExtract from a Zip or Unzip Return Value
- Junk Subdirs with Recurs Option
- List of Error Codes
- List of Files in Zip Archive
- Memory prob zipping Large No. of Files
- Multipart Archives
- Password Encryption
- Progress Bar while Zipping
- Recursive Zipping
- Sending Attachments and File Extension Getting Changed
- Timestamp Issues with zUnZipFiles
- UDF to List Files in Archive with t Option
- Unzipping Files without File Extensions
- Update and Freshen Options Overwrite All Files
- Zipper and UNC Paths
- Zipping and Unzipping Files Greater than 2GB
- Zippy vs WinZip with command line addon
- zUnZip Problem with non Ascii Characters
- zUnZipFile Slower Than Previous Version
- zUnZipFiles and Wildcards
- zUnZipFiles Problems with Extracting Specific File
- zZipFile Error 18
- zZipFiles with File List
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How the Update Option Works
Keywords: update infozip
Question:
First off, nice extender! However, I have some questions about usage. It appears as if you have implemented the fine InfoZip code, and also inherited some of its "limited features". I'm trying to convert some WB code that calls pkzip and zips some files/dir structure to the server. It uses the pkzip update feature to only copy changed/modified files (zips are somewhat large and users complain about the wait for a full zip). The new extender and the u option seem to work fine except - that if file1.txt is zipped and then later removed from the directory structure, the u option does not remove it from the zip file. InfoZip does the same thing.Answer:
Yes, our Zip extender is modelled after InfoZip's methodology.Pkzip works the same way as infozip does on an update, as does the Zip extender. So if a directory contains files f1.txt, f2.txt, and f3.txt, and were zipped to a file name test.zip. And then if you deleted f1.txt from the directory and ran the Zip extender with the update option, f1.txt will NOT be removed from the zip file. That's not how any of these zip utilities work, ourselves included.
Article ID: W12693
Filename: How Update Works.txt
File Created: 1999:04:15:16:48:58
Last Updated: 1999:04:15:16:48:58