Fetch pages with a headless browser.
The recommended browser is PhantomJS, a fast webkit-based headless browser. It's easy to install with Homebrew::
?> brew install phantomjs
Then install the requirements::
?> pip install -r requirements.txt
Then run the fetch command in the bin directory::
?> ./spin fetch /path/to/product_detail.tsv --htdocs=/path/to/htdocs