= Go contact form

== About

Provides a simple, tiny webservice that serves a contact form and sends responses
via e-mail.

== Usage

The simplest way to use this is via docker:

    docker run -d csmith/contact-form -from form@server.com -to me@email.com .....

You should place this service behind an TLS-terminating proxy, and ensure it
is requested over a secure connection.

== Command line flags

----
  -crsf-key string
        CRSF key to use
  -from string
        address to send e-mail from
  -port int
        port to listen on for connections (default 8080)
  -smtp-host string
        SMTP server to connect to
  -smtp-pass string
        password to supply to the SMTP server
  -smtp-port int
        port to use when connecting to the SMTP server (default 25)
  -smtp-user string
        username to supply to the SMTP server
  -subject string
        e-mail subject (default "Contact form submission")
  -to string
        address to send e-mail to
----

_from_, _to_, _smtp-host_, _smtp-user_, and _smtp-pass_ are required; other options have vaguely sensible fallbacks.

== Templates

The form itself is loaded from `form.html` in the working directory; success and failure pages from `success.html`
and `failure.html` respectively. Each is loaded as a https://golang.org/pkg/html/template/[go html.template] and
can use the templating syntax described there.

The form must contain the `{{ .csrfField }}` template field, which will automatically insert the CSRF token for
the request.

== Licence

This software is licensed under the MIT licence. See the LICENCE.adoc file for the full text.