Extract URLs from large documents

To extract URLs from large documents, you can use regular expressions. Here’s a Python-based solution that efficiently extracts all URLs from any size of text:

python
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import re

def extract_urls(text):
    # Regex pattern to match most URLs
    url_pattern = r'(https?://[^s"'>]+)'
    urls = re.findall(url_pattern, text)
    return urls

# Example usage:
with open('your_large_document.txt', 'r', encoding='utf-8') as file:
    content = file.read()

urls = extract_urls(content)

# Print or process the list of URLs
for url in urls:
    print(url)

Explanation:

• https?://: Matches both http and https protocols.

• [^s"'>]+: Matches any characters until it hits whitespace or a common delimiter that may end a URL.

For Very Large Files:

To avoid memory issues with very large documents, read and process the file line by line:

python
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def extract_urls_line_by_line(file_path):
    url_pattern = re.compile(r'(https?://[^s"'>]+)')
    urls = []
    with open(file_path, 'r', encoding='utf-8') as file:
        for line in file:
            urls.extend(url_pattern.findall(line))
    return urls

Let me know if you want this implemented in a different programming language or used on specific document types like PDFs or Word files.