Add additional header parameter for captureException method

[OmniRafa]

Hi all, I would like to add an additional header parameter for the outgoing request that the captureException method creates.
The problem is currently, the SentryServer is behind a securitywall . For the request to get through, it must contain a token. Every request to the server should contain this token. Is this possible?

[marandaneto]

@OmniRafa Right now this is not possible unless you make a custom transport.
You have to write and set your own transport into the options.transport variable.
This is probably easy if you duplicate most of the HttpTransport class.
Another option is that you add this capability to the SDK, by extending the SentryOptions, and HttpTransport classes, so HttpTransport#_buildHeaders tale into consideration an extra list of headers that come from the Client.
Are you willing to open a PR?
The Java SDK does something similar.

[OmniRafa]

Thank you very much for the detailed and helpful answer :) I will evaluate the effort with our customer and then we see how we will proceed. If we decide to go for the PR, I will post it here

[marandaneto]

Similar issue #975