Handy little email interceptor, written in Go and using Mongo for storage (Currently only supporting Sendgrid V3 API)

Because having to setup an account and give out keys to send email while developing sucks!

When Developing most of the time all you need is:

• A way to test that emails are being sent from our app
• Tokens/urls they generate
• Validate both text and html is as expected
• Validate the email has been received
• Store emails locally
• Test the email component of our app

clone the repo and docker-compose up to have local mail and the mongo document store running.

Support is build in for the Sendgrid v3 Api and uses the models they provide.

All unknown data will be stored as unused.

Mocks the api endpoint used by Sendgrid, processes and stores data

Prints to stdout:

• all recipients for the received email
• email subject
• URL for user interaction if one has been received
• link to view text version
• link to view html version
• ID for the stored email

Example output from received request

2019/08/24 17:41:31 POST /v3/mail/send HTTP/1.1
Host: localhost:7893
Connection: close
Accept: application/json
Authorization: Bearer sometoken
Connection: close
Content-Length: 27121
Content-Type: application/json
User-Agent: sendgrid/5.2.3;nodejs

Recipients: [[email protected]] 
Subject: Welcome Aboard Bob
URL: http://localhost:8080/signup?verify=6c243fc6-4464-46d1-ac20-a6bf2a8d0edc
HTML: http://localhost:7893/v3/mail/html/id/5d60f133ef2c8961b458f589 
TXT: http://localhost:7893/v3/mail/text/id/5d60f133ef2c8961b458f589 
ID: 5d60f133ef2c8961b458f589

Returns all mail received and stored by the Sendgrid endpoint.

Example Stored email JSON representation

[
    {
        "_id": "5d60ecc4ef2c89508320ff21",
        "recipients": [
            "[email protected]"
        ],
        "subject": "Welcome Aboard Bob",
        "full": {
            ...
            ...
        },
        "createdAt": "2019-08-24T07:52:36.283Z"
    },
    {
        "_id": "5d60ee01ef2c895987da8f59",
        "recipients": [
            "[email protected]"
        ],
        "subject": "Welcome Aboard Bill",
        "full": {
            ...
            ...
        },
        "createdAt": "2019-08-24T07:57:53.490Z"
    }
]

Returns the html content of the email - useful for viewing html formatting of the email in the browser.

Example Retrieve html content of email

URL: http://localhost:7893/v3/mail/html/id/5d60f133ef2c8961b458f589

Returns the text content of the email - useful for checking the email content in the terminal

$ curl http://localhost:7893/v3/mail/text/id/5d60f133ef2c8961b458f589
Hi, 

Welcome Aboard Bob.

YOUR ACCOUNT
http://localhost:8080/signup?verify=6c243fc6-4464-46d1-ac20-a6bf2a8d0edc

Sent by GopherLand
-

Returns the URL if it exists for an email given an ID - useful for pulling links out of emails

$ curl http://localhost:7893/v3/mail/text/link/id/5d60f133ef2c8961b458f589
http://localhost:8080/signup?verify=6c243fc6-4464-46d1-ac20-a6bf2a8d0edc

Stores the data locally for development.

Uses Mongo and admin-mongo (<--buy a coffee) to view and edit stored emails in the browser.

Navigate to http://localhost:1234/app/localmail to view entries