form_data - Linux
Overview
form_data is a lightweight command-line utility designed to parse and extract data from HTML forms. It provides a user-friendly interface for working with form data, making it easy to obtain and manipulate information such as input field values, checkboxes, and drop-down menus.
Syntax
form_data [options] <HTML document>
Options/Flags
- -f, –field-values: Extract all input field values from the form.
- -c, –checkboxes: Extract the checked status and values of all checkboxes.
- -d, –dropdowns: Extract the selected options from all drop-down menus.
- –no-empty: Ignore empty input fields.
- -o, –output-file: Write the extracted data to the specified file.
Examples
Extract all input field values:
form_data -f form.html
Extract checked checkboxes and their values:
form_data -c form.html
Extract selected options from drop-down menus and write to a file:
form_data -d form.html --output-file options.txt
Common Issues
Missing arguments: Ensure that you provide the path to the HTML document you want to parse.
Invalid HTML: The HTML document should be well-formed and accessible.
Integration
With grep: Filter the extracted data based on specific criteria.
form_data form.html | grep "username"
With jq: Parse JSON output for advanced data manipulation.
form_data form.html --output-file data.json | jq '.fields'
Related Commands
- html2text: Extract plaintext from HTML documents.
- wkhtmltopdf: Convert HTML to PDF.
- HTML Parser Libraries