B4X

Download a Zip from a URL and OpenBd. (No .zip file is created)

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Demonstrates how to download a .zip from a URL, opens the Zip, and gets the contents of a file. No file is ever written. B4X

Dim success As Boolean = False

'  This example requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

Dim http As ChilkatHttp
http.Initialize("http")

Dim bd As ChilkatBinData
bd.Initialize

'  This URL is valid and can be tested...
success = http.QuickGetBd("https://chilkatdownload.com/example_data/hamlet.zip", bd)
If http.LastMethodSuccess = False Then
    Log(http.LastErrorText)
    Return
End If


Dim zip As ChilkatZip
zip.Initialize("zip")

'  Open the zip from the bytes contained in bd.
success = zip.OpenBd(bd)
If success = False Then
    Log(zip.LastErrorText)
    Return
End If


'  Get the entry for the file we want..
Dim entry As ChilkatZipEntry
entry.Initialize("entry")
success = zip.EntryOf("hamlet.xml", entry)
If success = False Then
    Log(zip.LastErrorText)
    Return
End If


'  Convert all line endings to CRLF (if needed)
Dim lineEndingBehavior As Int = 2
Dim xmlStr As String = entry.UnzipToString(lineEndingBehavior, "utf-8")
If entry.LastMethodSuccess = False Then
    Log(entry.LastErrorText)
    Return
End If


'  The XML in this case is about 274K, so let's just examine the last 20 lines...
Dim sb As ChilkatStringBuilder
sb.Initialize
sb.Append(xmlStr)

Log(sb.LastNLines(20, True))