(Ruby) 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 Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

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

http = Chilkat::CkHttp.new()

req = Chilkat::CkHttpRequest.new()

# ...
# 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.
# resp is a CkHttpResponse
resp = http.SynchronousRequest("www.somedomain.com",443,true,req)
if (http.get_LastMethodSuccess() != true)
    print http.lastErrorText() + "\n";
    exit
end

# Get the response body (which is expected to be binary)
respBody = Chilkat::CkBinData.new()
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.
mime = Chilkat::CkMime.new()
success = mime.LoadMimeBd(respBody)
if (success != true)
    print mime.lastErrorText() + "\n";
    exit
end

numParts = mime.get_NumParts()
if (numParts < 2)
    print "Expected multipart MIME with at least 2 sub-parts." + "\n";
    exit
end

# Get the 1st sub-part, which is the XML.
# part0 is a CkMime
part0 = mime.GetPart(0)
# Should be OK because we checked NumParts above..
xmlStr = part0.getBodyDecoded()
print xmlStr + "\n";
print "----" + "\n";

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

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

print "OK." + "\n";