Xbase++ Requires Chilkat v11.0.0+

Parse Multipart Binary Http Response

See more HTTP Examples

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

LOCAL nSuccess
LOCAL oHttp
LOCAL oReq
LOCAL oResp
LOCAL oRespBody
LOCAL oMime
LOCAL nNumParts
LOCAL oPart0
LOCAL cXmlStr
LOCAL oPart1
LOCAL oZipData

nSuccess := 0

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

oHttp := CreateObject("Chilkat.Http")
oReq := CreateObject("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.
oResp := CreateObject("Chilkat.HttpResponse")
nSuccess := oHttp:HttpSReq("www.somedomain.com", 443, 1, oReq, oResp)
IF (nSuccess == 0)
    ? oHttp:LastErrorText
    oHttp:destroy()
    oReq:destroy()
    oResp:destroy()
    RETURN
ENDIF

//  Get the response body (which is expected to be binary)
oRespBody := CreateObject("Chilkat.BinData")
oResp:GetBodyBd(oRespBody)

//  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.
oMime := CreateObject("Chilkat.Mime")
nSuccess := oMime:LoadMimeBd(oRespBody)
IF (nSuccess == 0)
    ? oMime:LastErrorText
    oHttp:destroy()
    oReq:destroy()
    oResp:destroy()
    oRespBody:destroy()
    oMime:destroy()
    RETURN
ENDIF

nNumParts := oMime:NumParts
IF (nNumParts < 2)
    ? "Expected multipart MIME with at least 2 sub-parts."
    oHttp:destroy()
    oReq:destroy()
    oResp:destroy()
    oRespBody:destroy()
    oMime:destroy()
    RETURN
ENDIF

//  Get the 1st sub-part, which is the XML.

oPart0 := CreateObject("Chilkat.Mime")
oMime:PartAt(0, oPart0)

//  Should be OK because we checked NumParts above..
cXmlStr := oPart0:GetBodyDecoded()
? cXmlStr
? "----"

//  Save the 2nd part to a file.  (It is a .zip file in our test case..)

oPart1 := CreateObject("Chilkat.Mime")
oMime:PartAt(1, oPart1)

nSuccess := oPart1:SaveBody("qa_output/attachedZip.zip")

//  Alternatively, we could extract the binary data to a BinData and use elsewhere..
oZipData := CreateObject("Chilkat.BinData")
nSuccess := oPart1:GetBodyBd(oZipData)
nSuccess := oZipData:WriteFile("qa_output/attachedZip_again.zip")

? "OK."

oHttp:destroy()
oReq:destroy()
oResp:destroy()
oRespBody:destroy()
oMime:destroy()
oPart0:destroy()
oPart1:destroy()
oZipData:destroy()