I am using Minizip API to zip and unzip file to and from my archive. I have a requirement to delete the zip entry from the zip as soon as i extract it.
if the zip archive has multiple zip entries , i am able to delete a particular zip entry soon as i extract it and then able to zip archive with the remaining zip entries. i am able to achieve this using a temp zip .
But when i have a single file inside the zip archive, i am only able to delete the zip after complete extraction....Can there be a optimize way for this situation where i can extract and delete the zip entry in chunks. there is no direct API's in minizip to delete, i am using raw write and read.
Thanks in advance,
JP
No, there is no way to delete part of a file in a ZIP archive, short of extracting the whole file and archiving the part you don't want. (Which doesn't make sense here, since you're already trying to extract the file!)
Related
I'm looking for a tool that can extract files by searching aggressively through a ZIP archive. The compressed files are preceded with LFHs but no CDHs are present. Unzip outputs an empty folder.
I found one called 'binwalk' but even though it finds the hidden files inside ZIP archives it seems not to know how to extract them.
Thank You in advance.
You can try sunzip. It reads the zip file as a stream, and will extract files as it encounters the local headers and compressed data.
Use the -r option to retain the files decompressed in the event of an error. You will be left with a temporary directory starting with _z containing the extracted files, but with temporary, random names.
I know this has been asked (in other question as well as) here, which are exactly my cases. I have downloaded (via ADF) a zip file to Azure Blob and I am trying to decompress it and move the files to another location within the Azure Blob container.
However having tried both of those approaches I only end up with a zipped file moved to another location without it being unzipped.
Trying to understand your question - Was your outcome a zip file or the folder name has .zip on it? It sounds crazy, let me explain in detail. In ADF decompressing the zip file using copy activity creates a folder(which has .zip on its name) which has actual file in it.
Example: Let's say you have sample.txt inside abc.zip
Blob sourcepath: container1/abc.zip [Here abc.zip is a compressed file]
Output path will be: container2/abc.zip/sample.txt [Here, abc.zip is the decompressed folder name]
This is achieved when the copy behaviour of sink is "none". Hope it helps :)
I know how to do this for one archive at a time, but I want to add files, to multiple archives, in the same folder, simultaneously; if that is possible. I understand that I can do this with a batch file... but I don't know how to write the script / text.
So... I have several zip files in one folder. I want to add a specific text file and a specific image file to each/all of those zips. I don't want any other modifications of the zip files.
Or... is there a way to set WinRAR so that specific files will be automatically added whenever an archive is created?
Thanks
import zipfile
z = zipfile.ZipFile('cal.zip', mode='a', compression=zipfile.ZIP_DEFLATED)
z.write('/your/file/path') # or, z.writestr('your-filename', 'file-content')
z.close()
I am creating a zip file with JSZip but I have a very specific requirement that I can't figure out how to do.
When this file is unzipped it needs to create a folder with two files inside it. Let's say foo.zip unzips to create a folder foo with files bar.mp4 and baz.png.
So far that's easy enough I can just go
let zip = new Zip()
let folder = zip.folder('foo')
folder.file(`bar.mp4`, videoData)
folder.file(`baz.png`, imageData)
// Save as foo.zip
But what I need to happen is if I rename foo.zip to horse.zip then the folder created should be called horse. If I use the above code then it will always be called foo. I know this is possible because I have several zip files that currently do this.
Edit: I'm not tied to JSZip here either. I'm happy to do this any way that's possible. Code will only be run on the server.
How would I add the contents of an entire directory to an already existing zip file using python? The directory to be added to the zip file will also include other folders as well and there will be duplicates in the zip file that will need to be overwritten. Any help would be appreciated. Thanks in advance!
P.S. If it is possible to zip the directory then combine both files that would also work.
Python's zipfile module allows you to manipular ZIP compressed archives. The ZipFile.namelist() method returns a list of files in an archive, and the ZipFile.write() method lets you add files to the archive.
z = zipfile.ZipFile('myfile.zip')
The os.walk method allows you to iterate over all the files contained in a directory tree.
for root, dirs, files in os.walk('mydir'):
for filename in files:
z.write(os.path.join(root, filename))
Replacing a file in an archive appears to be tricky; you can removed items by creating a temporary archive and then replacing the original when you're done as described in this question.
It might be easier just to call the zip command instead, but put these together and you should be able to get to where you want.