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(PowerBuilder) 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.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
integer li_Success
oleobject loo_Http
oleobject loo_Req
oleobject loo_Resp
oleobject loo_RespBody
oleobject loo_Mime
integer li_NumParts
oleobject loo_Part0
string ls_XmlStr
oleobject loo_Part1
oleobject loo_ZipData

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

loo_Http = create oleobject
li_rc = loo_Http.ConnectToNewObject("Chilkat_9_5_0.Http")
if li_rc < 0 then
    destroy loo_Http
    MessageBox("Error","Connecting to COM object failed")
    return
end if

loo_Req = create oleobject
li_rc = loo_Req.ConnectToNewObject("Chilkat_9_5_0.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.
loo_Resp = loo_Http.SynchronousRequest("www.somedomain.com",443,1,loo_Req)
if loo_Http.LastMethodSuccess <> 1 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    destroy loo_Req
    return
end if

// Get the response body (which is expected to be binary)
loo_RespBody = create oleobject
li_rc = loo_RespBody.ConnectToNewObject("Chilkat_9_5_0.BinData")

loo_Resp.GetBodyBd(loo_RespBody)
destroy loo_Resp

// 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.
loo_Mime = create oleobject
li_rc = loo_Mime.ConnectToNewObject("Chilkat_9_5_0.Mime")

li_Success = loo_Mime.LoadMimeBd(loo_RespBody)
if li_Success <> 1 then
    Write-Debug loo_Mime.LastErrorText
    destroy loo_Http
    destroy loo_Req
    destroy loo_RespBody
    destroy loo_Mime
    return
end if

li_NumParts = loo_Mime.NumParts
if li_NumParts < 2 then
    Write-Debug "Expected multipart MIME with at least 2 sub-parts."
    destroy loo_Http
    destroy loo_Req
    destroy loo_RespBody
    destroy loo_Mime
    return
end if

// Get the 1st sub-part, which is the XML.
loo_Part0 = loo_Mime.GetPart(0)
// Should be OK because we checked NumParts above..
ls_XmlStr = loo_Part0.GetBodyDecoded()
Write-Debug ls_XmlStr
Write-Debug "----"
destroy loo_Part0

// Save the 2nd part to a file.  (It is a .zip file in our test case..)
loo_Part1 = loo_Mime.GetPart(1)
li_Success = loo_Part1.SaveBody("qa_output/attachedZip.zip")

// Alternatively, we could extract the binary data to a BinData and use elsewhere..
loo_ZipData = create oleobject
li_rc = loo_ZipData.ConnectToNewObject("Chilkat_9_5_0.BinData")

li_Success = loo_Part1.GetBodyBd(loo_ZipData)
li_Success = loo_ZipData.WriteFile("qa_output/attachedZip_again.zip")
destroy loo_Part1

Write-Debug "OK."


destroy loo_Http
destroy loo_Req
destroy loo_RespBody
destroy loo_Mime
destroy loo_ZipData

 

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