Regular Expressions 101

Explanation
Pro

amazonawsthe literal text amazonaws (case sensitive)

.any character (except for line terminators)

comthe literal text com (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 1([^\?]+)

Negated Character Class[^\?]+

+matches at least one character outside the set below:

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Detailed match information will be displayed here automatically.

25 tokens

amazonaws.com\/([^\?]+)

http://some-website.s3.amazonaws.com/lovecraft-05.epub?AWSAccessKeyId=KJHFHGFDSXF&Expires=3568732&Signature=%3JHF%3KUHF%2Bnuvnu%5LHF%3D

http://some-website.s3.amazonaws.com/lovecraft-05.epub?AWSAccessKeyId=KJHFHGFDSXF&Expires=3568732&Signature=%3JHF%3KUHF%2Bnuvnu%5LHF%3D