Get Media Management Metadata

This guide will walk you through the example of getting custom XMP data from a pdf file.

Before you begin

You should get your API key from your UniCloud account.

If this is your first time using UniPDF SDK, follow this guide to set up a local development environment.

Project setup

Clone the project repository

In your terminal, clone examples repository. It contains the Go code we will be using for this guide.

git clone

Navigate to the metadata folder in the unipdf-examples directory.

cd unipdf-examples/metadata

Configure environment variables

Replace the UNIDOC_LICENSE_API_KEY with your API credentials from your UniCloud account.





How it works

The following example code gets metadata from pdf file.

The import section imports necessary unipdf packages and other libraries. The init function loads UNIDOC_LICENSE_API_KEY from system environment and authenticates your request. The main function which gets the media management XMP metadata is defined in lines 24-111.

In lines 25-30 of the main function reads the input file from the command line arguments and sets to the the variable inputPath. The code in lines 33-37 measures the time taken to finish running the program. In lines 40-44 a new model.PdfReader is constructed using the given file path. Then the catalog metadata is retrieved in lines 47-50 using reader.GetCatalogMetadata(). The code in lines 53-56 gets the PdfObjectStream version of the metadata object.

In line 59 the XMP document is loaded using xmputil.LoadDocument(stream.Stream). Then media management metadata is extracted using xmpDoc.GetMediaManagement() in lines 65-69.

Finally in lines 72-111 various fields and information are printed.

Run the code

go run pdf_get_xmp_media_management_metadata.go <input.pdf>

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