Created
October 15, 2017 18:20
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(Filename as text) => | |
let | |
// Unz-function from: https://querypower.com/2017/03/22/extracting-power-queries-in-m/ | |
Unz = (binaryZip,fileName) => | |
let | |
//shorthand | |
UInt32 = BinaryFormat.ByteOrder(BinaryFormat.UnsignedInteger32,ByteOrder.LittleEndian), | |
UInt16 = BinaryFormat.ByteOrder(BinaryFormat.UnsignedInteger16,ByteOrder.LittleEndian), | |
//ZIP file header fixed size structure | |
Header = BinaryFormat.Record([ | |
MiscHeader = BinaryFormat.Binary(14), | |
CompressedSize = UInt32, | |
UncompressedSize = UInt32, | |
FileNameLen = UInt16, | |
ExtraFieldLen = UInt16]), | |
//ZIP file header dynamic size structure | |
FileData = (h)=> BinaryFormat.Record([ | |
FileName = BinaryFormat.Text(h[FileNameLen]), | |
ExtraField = BinaryFormat.Text(h[ExtraFieldLen]), | |
UncompressedData = BinaryFormat.Transform( | |
BinaryFormat.Binary(h[CompressedSize]), | |
(x) => try | |
Binary.Buffer(Binary.Decompress(x, Compression.Deflate)) | |
otherwise null)]), | |
//Parsing the binary in search for PKZIP header signature | |
ZipIterator = BinaryFormat.Choice(UInt32, (signature) => if signature <> 0x04034B50 | |
then BinaryFormat.Record([FileName=null]) | |
else BinaryFormat.Choice(Header,(z)=>FileData(z))), | |
ZipFormat = BinaryFormat.List(ZipIterator), | |
out = List.Select(ZipFormat(binaryZip), each _[FileName]=fileName) | |
in | |
out{0}[UncompressedData], | |
Source = Unz(Unz(File.Contents(Filename),"DataMashup"),"Formulas/Section1.m"), | |
Custom1 = Lines.FromBinary(Source), | |
#"Converted to Table" = Table.FromList(Custom1, Splitter.SplitByNothing(), null, null, ExtraValues.Error) | |
in | |
#"Converted to Table" |
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