Request adding http proxy support

[phrinx]

earlier version of the lib provided a way to set http client, so any users was able to configure http proxy. for some reason this support was removed in v3? https://github.com/sendgrid/sendgrid-java/pull/27/files#diff-e71bc6d543f1733c4a2bdbb11c154eecR44

providing a way to pass in http client instance would also help: https://github.com/sendgrid/sendgrid-java/blob/v2.2.2/src/main/java/com/sendgrid/SendGrid.java#L88

[thinkingserious]

Hi @phrinx,

This is now on our backlog to implement.

To help this issue rise up in our queue, it will need +1s or a pull request with a signed CLA.

Thanks!

[phrinx]

Thanks. This is critical for us as we integrated a production system with large amounts of traffic with v2 (using http proxy for security purposes) and are blocked to upgrade to v3 since this support was dropped. Please consider prioritizing...

[thinkingserious]

@phrinx,

We are not deprecating v2, so you are safe to continue using it until we make this upgrade.

[dmaicher]

I proposed a PR that should fix your issue: #158

That way you can do:

Client client = new Client(yourHttpClient);
SendGrid sendGrid = new SendGrid(apiKey, client);

[thinkingserious]

@phrinx,

Thanks to @dmaicher, we have a fix :)

https://github.com/sendgrid/sendgrid-java/releases/tag/v3.1.0