Hook more events into presign functionality#1340

Merged

kyleknap merged 4 commits intoboto:developfrom kyleknap:presign-event

Jan 25, 2018

+171-21

Commits on Dec 18, 2017

Commits on Jan 16, 2018

Convert a comment from PR to code
kyleknap
committed

Commits on Jan 17, 2018

Ensure presignings do not get processed by stubber
kyleknap
committed