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GitHub - sendgrid/sendgrid-go: The Official Twilio SendGrid Golang API Library
The Official Twilio SendGrid Golang API Library. Contribute to sendgrid/sendgrid-go development by creating an account on GitHub.
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GitHub - sendgrid/sendgrid-go: The Official Twilio SendGrid Golang API Library

GitHub - sendgrid/sendgrid-go: The Official Twilio SendGrid Golang API Library

Twilio SendGrid Logo

Test and Deploy GoDoc MIT licensed Twitter Follow GitHub contributors Open Source Helpers

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.

If you need help using SendGrid, please check the Twilio SendGrid Support Help Center.

Table of Contents

Installation

Supported Versions

This library supports the following Go implementations:

  • Go 1.14
  • Go 1.15
  • Go 1.16
  • Go 1.17
  • Go 1.18
  • Go 1.19

Prerequisites

  • 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

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", "[email protected]")
	subject := "Sending with Twilio SendGrid is Fun"
	to := mail.NewEmail("Example User", "[email protected]")
	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": "[email protected]"
				}
			],
			"subject": "Sending with Twilio SendGrid is Fun"
		}
	],
	"from": {
		"email": "[email protected]"
	},
	"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

Use Cases

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

Announcements

All updates to this library are documented in our CHANGELOG and releases.

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:

Troubleshooting

Please see our troubleshooting guide for common library issues.

About

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

Support

If you need help using SendGrid, please check the Twilio SendGrid Support Help Center.

License

The MIT License (MIT)

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