(Chilkat2-Python) Add File Attachments to a PDF

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Demonstrates how to attach files to a PDF. This is also known as embedding a file within a PDF.

Note: This example requires Chilkat v9.5.0.97 or greater.

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

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

pdf = chilkat2.Pdf()

# We'll be adding attachments to this PDF file..
# Note: We are loading the PDF file into memory.  The PDF file is not kept open at this point.
success = pdf.LoadFile("qa_data/pdf/helloWorld.pdf")
if (success == False):
    print(pdf.LastErrorText)
    sys.exit()

# Note: The ability to attach files to a PDF was added in Chilkat v9.5.0.97

# Build JSON to provide information about the files to be embedded in the PDF.
json = chilkat2.JsonObject()
json.EmitCompact = False

i = 0

# We can attach multiple files in one operation.

# Here we specify the local relative file path of the 1st file to be embedded.
json.I = i
json.UpdateString("files[i].description","Hello World")
json.UpdateString("files[i].localFilePath","qa_data/xml/helloWorld.xml")
i = i + 1

# Specify the 2nd file to be attached.
json.I = i
json.UpdateString("files[i].description","Image of starfish")
json.UpdateString("files[i].localFilePath","qa_data/jpg/starfish.jpg")
# You can explicitly specify the subType (i.e. MIME type) of the file.
# Otherwise Chilkat will use the default MIME type based on the filename extension.
# If no default MIME type exists, then "application/octet-stream" is used.
json.UpdateString("files[i].subType","image/jpeg")
i = i + 1

# You can alternatively provide the file data from base64 encoded data rather than from a local file.
json.I = i
json.UpdateString("files[i].description","Hello World from Data")
json.UpdateString("files[i].fileData","SGVsbG8gV29ybGQsIEhlbGxvIFdvcmxkLCBIZWxsbyBXb3JsZCwgSGVsbG8gV29ybGQsIEhlbGxvIFdvcmxk")
json.UpdateString("files[i].embeddedFilename","abc.txt")
i = i + 1

# By default, the filename used within the PDF is the filename part of the local file path.
# You can change it by specifying the embeddedFilename.
json.I = i
json.UpdateString("files[i].description","Invoice")
json.UpdateString("files[i].localFilePath","qa_data/xml/invoice.xml")
json.UpdateString("files[i].embeddedFilename","invoice_1234.xml")
json.UpdateString("files[i].subType","application/xml")

# The above JSON provides instructions for attaching 4 files to the PDF.
# Let's attach the files..
# It is perfectly acceptable to write over the PDF file that was loaded,
# but in this example we'll write the PDF with attachments to a new PDF file.
success = pdf.AddEmbeddedFiles(json,"qa_output/helloWorld_withAttachments.pdf")
if (success == False):
    print(pdf.LastErrorText)
    sys.exit()

# You can alternatively write the PDF file with attachments to a Chilkat BinData object..
bd = chilkat2.BinData()
success = pdf.AddEmbeddedFilesBd(json,bd)
if (success == False):
    print(pdf.LastErrorText)
    sys.exit()

# Then you can do what you want with the BinData, which contains the binary image of the PDF with attachments.

print("Success.")