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(CkPython) eBay -- Download Data using FileTransferService

Demonstrates how to download a data file using the eBay File Transfer API.

Note: This example requires Chilkat v9.5.0.67 or later.

Chilkat Python Downloads

Python Module for Windows, Linux, Alpine Linux,
MAC OS X, Solaris, FreeBSD, OpenBSD,
Raspberry Pi and other single board computers

import sys
import chilkat

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

# Use a previously obtained access token.  The token should look something like this:
# "AgAAAA**AQA ..."
accessToken = "EBAY_ACCESS_TOKEN"

http = chilkat.CkHttp()

req = chilkat.CkHttpRequest()

req.put_HttpVerb("POST")
req.put_Path("/FileTransferService")
req.put_ContentType("application/xml")

# Build the XML body for the request.
xml = chilkat.CkXml()
xml.put_Tag("downloadFileRequest")
xml.AddAttribute("xmlns","http://www.ebay.com/marketplace/services")
xml.UpdateChildContent("taskReferenceId","50013004806")
xml.UpdateChildContent("fileReferenceId","50015579016")

req.LoadBodyFromString(xml.getXml(),"utf-8")

# The XML body looks like this:

# 	<?xml version="1.0" encoding="UTF-8"?>
# 	<downloadFileRequest xmlns="http://www.ebay.com/marketplace/services">
# 	<taskReferenceId>50013004806</taskReferenceId>
# 	<fileReferenceId>50015579016</fileReferenceId>
# 	</downloadFileRequest>

req.AddHeader("X-EBAY-SOA-OPERATION-NAME","downloadFile")
req.AddHeader("X-EBAY-SOA-SECURITY-TOKEN",accessToken)

# resp is a CkHttpResponse
resp = http.SynchronousRequest("storage.sandbox.ebay.com",443,True,req)
if (http.get_LastMethodSuccess() != True):
    print(http.lastErrorText())
    sys.exit()

statusCode = resp.get_StatusCode()
print("Response status code = " + str(statusCode))

responseBody = chilkat.CkBinData()
resp.GetBodyBd(responseBody)

# We can save the response body to a file for examination if we get an unanticipated response.  
# (It's binary, so it won't open well in a text editor.)
responseBody.WriteFile("qa_output/response.mime")

if (statusCode != 200):
    print("Failed.")
    sys.exit()

# The response body looks like this:

# 	--MIMEBoundaryurn_uuid_2B668636C1E17A4D4114925305818684241
# 	Content-Type: application/xop+xml; charset=utf-8; type="text/xml"
# 	Content-Transfer-Encoding: binary
# 	Content-ID: <0.urn:uuid:2B668636C1E17A4D4114925305818684242>
# 
# 	<?xml version='1.0' encoding='UTF-8'?>
# 	<downloadFileResponse xmlns="http://www.ebay.com/marketplace/services">
# 	<ack>Success</ack>
# 	<version>1.1.0</version>
# 	<timestamp>2017-04-18T15:49:41.868Z</timestamp>
# 	<fileAttachment>
# 	    <Size>587</Size>
# 	    <Data>
#                 <xop:Include xmlns:xop="http://www.w3.org/2004/08/xop/include" href="cid:urn:uuid:A37C3C73E994C267F11492530585522"/>
# 	    </Data>
# 	</fileAttachment>
# 	</downloadFileResponse>
# 	--MIMEBoundaryurn_uuid_2B668636C1E17A4D4114925305818684241
# 	Content-Type: application/zip
# 	Content-Transfer-Encoding: binary
# 	Content-ID: <urn:uuid:A37C3C73E994C267F11492530585522>
# 
# 	<the binary bytes of the zip start here...>
# 

# Load the binary response into a MIME object.
mime = chilkat.CkMime()
success = mime.LoadMimeBd(responseBody)
if (success != True):
    print(mime.lastErrorText())
    sys.exit()

# Make sure we have 2 sub-parts.  The 1st sub-part is the XML response, the 2nd sub-part
# is the zip containing the data.

# Note: The 2nd sub-part can be a "zip" or "gzip".  These are two different file formats.
# A zip is indicated with a Content-Type header equal to "application/zip",
# whereas a gzip is indicated with a Content-Type header equal to "application/x-gzip"
if (mime.get_NumParts() != 2):
    print("Expected the MIME to have 2 parts.")
    print("NumParts = " + str(mime.get_NumParts()))
    print("Failed.")
    sys.exit()

# Get the XML from the 1st MIME sub-part.
# part0 is a CkMime
part0 = mime.GetPart(0)
downloadResponseXml = part0.getBodyDecoded()
xmlResp = chilkat.CkXml()
xmlResp.LoadXml(downloadResponseXml)
print("Download Response XML:")
print(xmlResp.getXml())

print("----")

# Now get the zip from the second part (index=1), unzip, and examine..
# part1 is a CkMime
part1 = mime.GetPart(1)
zipData = chilkat.CkBinData()
# This example requires Chilkat v9.5.0.67 or later.
# The GetBodyBd method was added in v9.5.0.67.
part1.GetBodyBd(zipData)

# Check to see if we have a zip or gzip.
sbContentType = chilkat.CkStringBuilder()
sbContentType.Append(part1.contentType())

xmlFromZip = chilkat.CkXml()

if (sbContentType.Contains("gzip",False) == True):
    # This is a gzip compressed file.
    gzip = chilkat.CkGzip()

    # in-place uncompress the data.
    # Note: The UncompressBd method was added in Chilkat v9.5.0.67
    success = gzip.UncompressBd(zipData)
    if (success != True):
        print(gzip.lastErrorText())
        sys.exit()

    xmlFromZip.LoadXml(zipData.getString("utf-8"))

else:
    # This is a zip archive.

    # Load the body into a Zip object.
    zip = chilkat.CkZip()
    success = zip.OpenBd(zipData)
    if (success != True):
        print(zip.lastErrorText())
        sys.exit()

    # Save the .zip to a file (so we can examine it for debugging if something is not as expected)
    zipData.WriteFile("qa_output/ebay_data.zip")

    # The zip should contain a single XML file.
    if (zip.get_NumEntries() != 1):
        print("Expected the .zip to have 1 entry.")
        print("NumEntries = " + str(zip.get_NumEntries()))
        print("Failed.")
        sys.exit()

    # entry is a CkZipEntry
    entry = zip.GetEntryByIndex(0)

    xmlFromZip.LoadXml(entry.unzipToString(0,"utf-8"))

print("XML contained in the zip:")
print(xmlFromZip.getXml())
print("----")

print("Success.")

 

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