Data enrichment part three: URL parser data enrichment

URL parser data enrichment is extracting various URL components to gain additional insights and context about the URL. This extracted information can be used for data analysis, marketing, SEO, and more.

URL parsing process

Here is step-by-step process for URL parser data enrichment :

1. Get the URL data that is needed to be parsed from a source or create one.
2. Send the URL data to an API like URL Parser API.
3. Get the parsed URL data.
4. Include metadata like conversion rate, date, and time.
5. Save the updated dataset in a data warehouse or lake using a data pipeline.

We use URL Parse API to extract the information about the URL. However, you can use any API you prefer.

tip

URL Parse API is free, with 1000 requests/hour limit, which can be increased on request.

By default the URL Parse API will return a JSON response like:

{
    "authority": "urlparse.com",
    "domain": "urlparse.com",
    "domain_label": "urlparse",
    "file": "/",
    "fragment": null,
    "host": "urlparse.com",
    "href": "https://urlparse.com/",
    "is_valid": true,
    "origin": "https://urlparse.com",
    "params": null,
    "path": "/",
    "port": null,
    "query": null,
    "request_url": "https://urlparse.com",
    "scheme": "https",
    "subdomains": null,
    "tld": "com"
}

Creating data enrichment pipeline

You can either follow the example in the linked Colab notebook or follow this documentation to create the URL-parser data enrichment pipeline.

A. Colab notebook

This Colab notebook outlines a three-part data enrichment process for a sample dataset:

• User-agent device data enrichment
• Currency conversion data enrichment
• URL-parser data enrichment

This document focuses on the URL-Parser Data Enrichment (Part Three). For a comprehensive understanding, you may explore all three enrichments sequentially in the notebook: Colab Notebook.

B. Create a pipeline

Alternatively, to create a data enrichment pipeline, you can start by creating the following directory structure:

url_parser_enrichment/
├── .dlt/
│   └── secrets.toml
└── url_enrichment_pipeline.py

1. Creating resource

dlt works on the principle of sources and resources.

This data resource yields data typical of what many web analytics and tracking tools can collect. However, the specifics of what data is collected and how it's used can vary significantly among different tracking services.

Let's examine a synthetic dataset created for this article. It includes:

• user_id: Web trackers typically assign unique ID to users for tracking their journeys and interactions over time.

• device_name: User device information helps in understanding the user base's device.

• page_refer: The referer URL is tracked to analyze traffic sources and user navigation behavior.

Here's the resource that yields the sample data as discussed above:

    import dlt

    @dlt.resource(write_disposition="append")
    def tracked_data():
        """
        A generator function that yields a series of dictionaries, each representing
        user tracking data.

        This function is decorated with `dlt.resource` to integrate into the DLT (Data
        Loading Tool) pipeline. The `write_disposition` parameter is set to "append" to
        ensure that data from this generator is appended to the existing data in the
        destination table.

        Yields:
            dict: A dictionary with keys 'user_id', 'device_name', and 'page_referer',
            representing the user's tracking data including their device and the page
            they were referred from.
        """

        # Sample data representing tracked user data
        sample_data = [
        {
                "user_id": 1,
                "device_name": "Sony Experia XZ",
                "page_referer": "https://b2venture.lightning.force.com/"
        },
            """
            Data for other users
            """
        ]

        # Yielding each user's data as a dictionary
        for user_data in sample_data:
            yield user_data

2. Create url_parser function

We use a free service called URL Parse API, to parse the urls. You don’t need to register to use this service neither get an API key.

1. Create a url_parser function as follows:

   # @dlt.transformer(data_from=tracked_data)
   def url_parser(record):
       """
       Send a URL to a parsing service and return the parsed data.
   
       This function sends a URL to a specified API endpoint for URL parsing.
   
       Parameters:
       url (str): The URL to be parsed.
   
       Returns:
       dict: Parsed URL data in JSON format if the request is successful.
       None: If the request fails (e.g., an invalid URL or server error).
       """
       # Define the API endpoint URL for the URL parsing service
       api_url = "https://api.urlparse.com/v1/query"
       url = record['page_referer']
       # Send a POST request to the API with the URL to be parsed
       response = requests.post(api_url, json={"url": url})
   
       # Check if the response from the API is successful (HTTP status code 200)
       if response.status_code == 200:
           # If successful, return the parsed data in JSON format
           return response.json()
       else:
           # If the request failed, print an error message with the status code and return None
           print(f"Request for {url} failed with status code: {response.status_code}")
           return None

3. Create your pipeline

1. In creating the pipeline, the url_parser can be used in the following ways:

   • Add map function
   • Transformer function

   The dlt library's transformer and add_map functions serve distinct purposes in data processing.

   Transformers are a form of dlt resource that takes input from other resources via data_from argument to enrich or transform the data. Click here.

   Conversely, add_map used to customize a resource applies transformations at an item level within a resource. It's useful for tasks like anonymizing individual data records. More on this can be found under Customize resources in the documentation.

2. Here, we create the pipeline and use the add_map functionality:

   # Create the pipeline
   pipeline = dlt.pipeline(
       pipeline_name="data_enrichment_three",
       destination="duckdb",
       dataset_name="user_device_enrichment",
   )
   
   # Run the pipeline with the transformed source
   load_info = pipeline.run(tracked_data.add_map(url_parser))
   
   print(load_info)
   info

   Please note that the same outcome can be achieved by using the transformer function. To do so, you need to add the transformer decorator at the top of the url_parser function. For pipeline.run, you can use the following code:

   # using fetch_average_price as a transformer function
   load_info = pipeline.run(
       tracked_data | url_parser,
       table_name="url_parser"
   )

   This will execute the url_parser function with the tracked data and return parsed URL.

Run the pipeline

1. Install necessary dependencies for the preferred destination, For example, duckdb:

   pip install dlt[duckdb]

2. Run the pipeline with the following command:

   python url_enrichment_pipeline.py

3. To ensure that everything loads as expected, use the command:

   dlt pipeline <pipeline_name> show

   For example, the "pipeline_name" for the above pipeline example is data_enrichment_three; you can use any custom name instead.