(Xojo Plugin) Parse Multipart Binary Http Response

This example demonstrates how to parse an HTTP response that is multipart and contains a binary file, such as a .zip or .pdf.

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

Dim success As Boolean
Dim http As New Chilkat.Http

Dim req As New Chilkat.HttpRequest

// ...
// Insert code here to construct some kind of HTTP request.
// this example is to show how to parse a particular kind of response.
// ...
// ...

// Send the request (whatever it may be in your case) to get the HTTP response object.
Dim resp As Chilkat.HttpResponse
resp = http.SynchronousRequest("www.somedomain.com",443,True,req)
If (http.LastMethodSuccess <> True) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

// Get the response body (which is expected to be binary)
Dim respBody As New Chilkat.BinData
success = resp.GetBodyBd(respBody)

// For this example, the response body contains something like this:

// ------=_Part_21302_2029949381.1547401515443
// Content-Type: application/xop+xml; charset=UTF-8; type="text/xml"
// Content-Transfer-Encoding: 8bit
// Content-ID: <rootpart@ws.jboss.org>
// 
// <env:Envelope xmlns:env='http://schemas.xmlsoap.org/soap/envelope/'><env:Header></env:Header><env:Body>...</env:Body></env:Envelope>
// ------=_Part_21302_2029949381.1547401515443
// Content-Type: application/octet-stream
// Content-Transfer-Encoding: binary
// Content-Id: <fileArchivio-7d302908-4d64-43d3-bf4e-79ce806d43b3@ws.jboss.org>
// 
// BINARY_CONTENT_HERE...
// 
// ------=_Part_21302_2029949381.1547401515443--
// 

// Load it into a Chilkat MIME object.
Dim mime As New Chilkat.Mime
success = mime.LoadMimeBd(respBody)
If (success <> True) Then
    System.DebugLog(mime.LastErrorText)
    Return
End If

Dim numParts As Int32
numParts = mime.NumParts
If (numParts < 2) Then
    System.DebugLog("Expected multipart MIME with at least 2 sub-parts.")
    Return
End If

// Get the 1st sub-part, which is the XML.
Dim part0 As Chilkat.Mime
part0 = mime.GetPart(0)
// Should be OK because we checked NumParts above..
Dim xmlStr As String
xmlStr = part0.GetBodyDecoded()
System.DebugLog(xmlStr)
System.DebugLog("----")

// Save the 2nd part to a file.  (It is a .zip file in our test case..)
Dim part1 As Chilkat.Mime
part1 = mime.GetPart(1)
success = part1.SaveBody("qa_output/attachedZip.zip")

// Alternatively, we could extract the binary data to a BinData and use elsewhere..
Dim zipData As New Chilkat.BinData
success = part1.GetBodyBd(zipData)
success = zipData.WriteFile("qa_output/attachedZip_again.zip")

System.DebugLog("OK.")