supremevast.blogg.se - File cant be extracted the unarchiver

File cant be extracted the unarchiver zip file#
File cant be extracted the unarchiver full#
File cant be extracted the unarchiver code#
File cant be extracted the unarchiver zip#

Here is the hex dump of the end of your zip file.Ġx02014b50 marks the beginning of the official copy of the central directory, as indicated by the last few bytes 0x00761ba9 (which point to the start of the directory)

File cant be extracted the unarchiver code#

You need to modify the M code to handle this different situation. That can be handled by the unzip tools (which use the central directory at the end), but your M code (which doesn't use the directory - it uses local file headers ) expects actual data there. That behavior is normally reserved for files over 4GB. Both the compressed file size and the uncompressed file size of the "Report 1.csv" file are zero in the local header. Your doesnotwork.zip file does not adhere to the "old" ZIP standard. Source = unzip("C:\downloads\doesnotwork.zip"), Name it unzip and and then call it like this get the raw data of the compressed fileīinary.Decompress(Raw(Source), Compression.Deflate)

Offset = 30+FirstDirectoryEntry(Source)+FirstDirectoryEntry(Source),Ĭompressed = FirstDirectoryEntry(Source)+1, UnCompressedFileSize=BinaryFormat.Binary(4),įileNameLen=BinaryFormat.ByteOrder(BinaryFormat.UnsignedInteger16, ByteOrder.LittleEndian),ĮxtrasLen=BinaryFormat.ByteOrder(BinaryFormat.UnsignedInteger16, ByteOrder.LittleEndian) MiscHeader=BinaryFormat.Binary(Start+20),įileSize=BinaryFormat.ByteOrder(BinaryFormat.UnsignedInteger32, ByteOrder.LittleEndian),

find the first entry in the directory and get the compressed file sizeįirstDirectoryEntry = BinaryFormat.Record([ Start=BinaryFormat.ByteOrder(BinaryFormat.UnsignedInteger32, ByteOrder.LittleEndian) Find the start of the central directory at the sixth to last byte Source = Binary.Buffer(File.Contents(ZIPFile)),

File cant be extracted the unarchiver zip file#

read the entire ZIP file into memory - we'll use it often so this is worth it

File cant be extracted the unarchiver full#

expects full path to the ZIP file, only extracts the first data file after getting its size from the central directory It ignores the local file entries and grabs the data from the central directory instead. Here is a version that should work with all of your ZIP files. Thanks in advance for anyone spending time looking into this, and if it's useful here are the query and custom function in excel I'm hoping this can shed some light on this problem & maybe generate a solution.

Here are the properties for the zip files themselves, again with the differences highlighted in yellow.

Here you can view the properties of the compressed CSV files inside their respective ZIPs ( works and doesnotwork), the differences are highlighted in yellow on the "doesnotwork" image.

The zip file without the problem has been named works.zip and the one which causes the error is doesnotwork.zip.

This indicates that the Power Query error is being triggered by either the method used to compress the CSV file or potentially the code for the custom function not handling all compression formats (?)

If I extract the CSV file from the zip, and manually create a new zip file containing the same CSV, then Power Query is able to successfully access the binary data using the same custom function created above in point #1.

The error mentioned above in point #2, only occurs when I am using ZIP files which havw been generated by SAP BI.

csv, Excel workbooks etc.) and try again " Please filter the list of files so it contains only supported types (Text.

When trying to access the binary data of the CSV file, Power Query throws the error " We didn’t recognize the format of your first file ().

Custom function to extract files from Zip, successfully created in line with Mark White's BI Blog.

So I am providing more detailed information into the zip file properties, in the hope that people much smarter than me, will be able to identify the root-cause of the problem. I know there has been several attempts to address this previously, but so far without resolution (as far as I am aware).