System for meta information output options (timing, SSL info, …)

[jkbrzt]

Meta issue for designing a system for displaying additional information to requests and responses. The current philosophy is to only show the actual HTTP exchanges so that they can be easily copied to API docs, sent elsewhere using nc, etc. The only non-http output is error messages & the download progress bar. This new system will provide a solution for showing additional metadata in a systematic and backward-compatible way.

Relevant issues: #1011 #1007 #243 #329 #685

[cascadingstyletrees]

As someone who is constantly troubleshooting requests to APIs and CDN issues, seeing the SSL handshake(and even the SNI host), and certificate details are invaluable. The option to modify SNI host (like host headers), would be a unique feature that is hard to come by.

I would really appreciate more features of this type, HTTPIE is just so good, but like curl seems to output either too little or too much.