In this guide, we’ll explore how to scrape images from websites using different methods. We'll also cover the most common image scraping challenges and how to overcome them. By the end of this article, you will be an image scraping master!
To get the file type of an URL we have 2 options - check the URL string for file suffix or perform a HEAD request:
import mimetypes # mimetypes module can analysize string for file extensions: mimetypes.guess_type("http://example.com/file.pdf") ('application/pdf', None) mimetypes.guess_type("http://example.com/song.mp3") ('audio/mpeg', None) mimetypes.guess_type("http://example.com/file-without-extension") (None, None) # for files without extension we can make head request which only downloads the metadata import httpx response = httpx.head("https://httpbin.dev/html").headers['Content-Type'] 'text/html; charset=utf-8' httpx.head("https://wiki.mozilla.org/images/3/37/Mozilla_MDN_Guide.pdf").headers['Content-Type'] 'application/pdf'
When web scraping and web crawling knowing content type before retrieving URL contents can save a lot of bandwidth and speed up the web scraping process. For example, when crawling we only want to follow HTML pages and avoid media files.