sendgrid

README

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This library allows you to quickly and easily use the Twilio SendGrid Web API v3 via Go.

Version 3.X.X of this library provides full support for all Twilio SendGrid Web API v3 endpoints, including the new v3 /mail/send.

This library represents the beginning of a new path for Twilio SendGrid. We want this library to be community driven and Twilio SendGrid led. We need your help to realize this goal. To help make sure we are building the right things in the right order, we ask that you create issues and pull requests or simply upvote or comment on existing issues or pull requests.

Please browse the rest of this README for further detail.

We appreciate your continued support, thank you!

Table of Contents

• Installation
• Quick Start
• Processing Inbound Email
• Usage
• Use Cases
• Announcements
• Roadmap
• How to Contribute
• Troubleshooting
• About
• License

Installation

Prerequisites

• Go version 1.6
• The Twilio SendGrid service, starting at the free level, to send up to 40,000 emails for the first 30 days, then send 100 emails/day free forever or check out our pricing.

Setup Environment Variables

Update the development environment with your SENDGRID_API_KEY, for example:

echo "export SENDGRID_API_KEY='YOUR_API_KEY'" > sendgrid.env
echo "sendgrid.env" >> .gitignore
source ./sendgrid.env

Install Package

go get github.com/sendgrid/sendgrid-go

Dependencies

• rest

Setup Environment Variables

Initial Setup

cp .env_sample .env

Environment Variable

Update the development environment with your SENDGRID_API_KEY, for example:

echo "export SENDGRID_API_KEY='YOUR_API_KEY'" > sendgrid.env
echo "sendgrid.env" >> .gitignore
source ./sendgrid.env

Quick Start

Hello Email

The following is the minimum needed code to send an email with the /mail/send Helper (here is a full example):

With Mail Helper Class

package main

import (
	"fmt"
	"log"
	"os"

	"github.com/sendgrid/sendgrid-go"
	"github.com/sendgrid/sendgrid-go/helpers/mail"
)

func main() {
	from := mail.NewEmail("Example User", "test@example.com")
	subject := "Sending with Twilio SendGrid is Fun"
	to := mail.NewEmail("Example User", "test@example.com")
	plainTextContent := "and easy to do anywhere, even with Go"
	htmlContent := "<strong>and easy to do anywhere, even with Go</strong>"
	message := mail.NewSingleEmail(from, subject, to, plainTextContent, htmlContent)
	client := sendgrid.NewSendClient(os.Getenv("SENDGRID_API_KEY"))
	response, err := client.Send(message)
	if err != nil {
		log.Println(err)
	} else {
		fmt.Println(response.StatusCode)
		fmt.Println(response.Body)
		fmt.Println(response.Headers)
	}
}

The NewEmail constructor creates a personalization object for you. Here is an example of how to add to it.

Without Mail Helper Class

The following is the minimum needed code to send an email without the /mail/send Helper (here is a full example):

package main

import (
	"fmt"
	"github.com/sendgrid/sendgrid-go"
	"log"
	"os"
)

func main() {
	request := sendgrid.GetRequest(os.Getenv("SENDGRID_API_KEY"), "/v3/mail/send", "https://api.sendgrid.com")
	request.Method = "POST"
	request.Body = []byte(` {
	"personalizations": [
		{
			"to": [
				{
					"email": "test@example.com"
				}
			],
			"subject": "Sending with Twilio SendGrid is Fun"
		}
	],
	"from": {
		"email": "test@example.com"
	},
	"content": [
		{
			"type": "text/plain",
			"value": "and easy to do anywhere, even with Go"
		}
	]
}`)
	response, err := sendgrid.API(request)
	if err != nil {
		log.Println(err)
	} else {
		fmt.Println(response.StatusCode)
		fmt.Println(response.Body)
		fmt.Println(response.Headers)
	}
}

General v3 Web API Usage

package main

import (
	"fmt"
	"github.com/sendgrid/sendgrid-go"
	"log"
	"os"
)

func main() {
	request := sendgrid.GetRequest(os.Getenv("SENDGRID_API_KEY"), "/v3/api_keys", "https://api.sendgrid.com")
	request.Method = "GET"

	response, err := sendgrid.API(request)
	if err != nil {
		log.Println(err)
	} else {
		fmt.Println(response.StatusCode)
		fmt.Println(response.Body)
		fmt.Println(response.Headers)
	}
}

Processing Inbound Email

Please see our helper for utilizing our Inbound Parse webhook.

Usage

• Twilio SendGrid Docs
• Library Usage Docs
• Example Code
• How-to: Migration from v2 to v3
• v3 Web API Mail Send Helper

Use Cases

Examples of common API use cases, such as how to send an email with a transactional template.

Announcements

Join an experienced and passionate team that focuses on making an impact. Opportunities abound to grow the product - and grow your career!

Please see our announcement regarding breaking changes. Your support is appreciated!

All updates to this library are documented in our CHANGELOG and releases. You may also subscribe to email release notifications for releases and breaking changes.

Roadmap

If you are interested in the future direction of this project, please take a look at our open issues and pull requests. We would love to hear your feedback.

How to Contribute

We encourage contribution to our libraries (you might even score some nifty swag), please see our CONTRIBUTING guide for details.

Quick links:

• Feature Request
• Bug Reports
• Sign the CLA to Create a Pull Request
• Improvements to the Codebase
• Review Pull Requests

Troubleshooting

Please see our troubleshooting guide for common library issues.

About

sendgrid-go is guided and supported by the Twilio SendGrid Developer Experience Team.

sendgrid-go is maintained and funded by Twilio SendGrid, Inc. The names and logos for sendgrid-go are trademarks of Twilio SendGrid, Inc.

License

The MIT License (MIT)

Documentation

Overview

Package sendgrid provides a simple interface to interact with the Twilio SendGrid API

Index

• Constants
• Variables
• func API(request rest.Request) (*rest.Response, error)
• func GetRequest(key, endpoint, host string) rest.Request
• func GetRequestSubuser(key, endpoint, host, subuser string) rest.Request
• func MakeRequest(request rest.Request) (*rest.Response, error)
• func MakeRequestAsync(request rest.Request) (chan *rest.Response, chan error)
• func MakeRequestRetry(request rest.Request) (*rest.Response, error)
• type Client
  • func NewSendClient(key string) *Client
  • func NewSendClientSubuser(key, subuser string) *Client
  • func (cl *Client) Send(email *mail.SGMailV3) (*rest.Response, error)

Constants

const (
	Version = "3.1.0"
)

Version is this client library's current version

Variables

var DefaultClient = rest.DefaultClient

DefaultClient is used if no custom HTTP client is defined

Functions

func API

func API(request rest.Request) (*rest.Response, error)

API sets up the request to the Twilio SendGrid API, this is main interface. Please use the MakeRequest or MakeRequestAsync functions instead. (deprecated)

func GetRequest

func GetRequest(key, endpoint, host string) rest.Request

GetRequest @return [Request] a default request object

func GetRequestSubuser

func GetRequestSubuser(key, endpoint, host, subuser string) rest.Request

GetRequestSubuser like GetRequest but with On-Behalf of Subuser @return [Request] a default request object

func MakeRequest

func MakeRequest(request rest.Request) (*rest.Response, error)

MakeRequest attempts a Twilio SendGrid request synchronously.

func MakeRequestAsync

func MakeRequestAsync(request rest.Request) (chan *rest.Response, chan error)

MakeRequestAsync attempts a request asynchronously in a new go routine. This function returns two channels: responses and errors. This function will retry in the case of a rate limit.

func MakeRequestRetry

func MakeRequestRetry(request rest.Request) (*rest.Response, error)

MakeRequestRetry a synchronous request, but retry in the event of a rate limited response.

Types

type Client

type Client struct {
	// rest.Request
	rest.Request
}

Client is the Twilio SendGrid Go client

func NewSendClient

func NewSendClient(key string) *Client

NewSendClient constructs a new Twilio SendGrid client given an API key

func NewSendClientSubuser

func NewSendClientSubuser(key, subuser string) *Client

GetRequestSubuser like NewSendClient but with On-Behalf of Subuser @return Client

func (*Client) Send

func (cl *Client) Send(email *mail.SGMailV3) (*rest.Response, error)

Send sends an email through Twilio SendGrid