Ruby
SendGrid HTML Email with Embedded Images

Demonstrates how to send an HTML email with embedded images using SendGrid.
Chilkat Ruby Downloads

Ruby
require 'chilkat'

success = false

# This requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code

req = Chilkat::CkHttpRequest.new()
http = Chilkat::CkHttp.new()

# First.. load a JPG file and build an HTML img tag with the JPG data inline encoded.
# Our HTML img tag will look like this:
# <img src="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEA3ADcAA..." alt="" style="border-width:0px;" />
bdJpg = Chilkat::CkBinData.new()
success = bdJpg.LoadFile("qa_data/jpg/starfish.jpg")
if (success == false)
    print "Failed to load JPG file." + "\n";
    exit
end

# Note: HTML containing embedded base64 image data may not be visible in all email clients.
# For example, GMail might not display the image, but viewing in Outlook might be OK.
sbHtml = Chilkat::CkStringBuilder.new()
sbHtml.Append("<html><body><b>This is a test<b><br /><img src=\"data:image/jpeg;base64,")
# Append the base64 image data to sbHtml.
bdJpg.GetEncodedSb("base64",sbHtml)
sbHtml.Append("\" alt=\"\" style=\"border-width:0px;\" /></body></html>")

json = Chilkat::CkJsonObject.new()
json.UpdateString("personalizations[0].to[0].email","matt@chilkat.io")
json.UpdateString("personalizations[0].to[0].name","Matt")
json.UpdateString("from.email","admin@chilkatsoft.com")
json.UpdateString("subject","Test HTML email with images")
json.UpdateString("content[0].type","text/html")
json.UpdateSb("content[0].value",sbHtml)

http.put_AuthToken("SENDGRID_API_KEY")

resp = Chilkat::CkHttpResponse.new()
success = http.HttpJson("POST","https://api.sendgrid.com/v3/mail/send",json,"application/json",resp)
if (success == false)
    print http.lastErrorText() + "\n";
    exit
end

print "response status code: " + resp.get_StatusCode().to_s() + "\n";
# Display the response.
# If successful, the response code is 202 and the response body string is empty.
# (The response body string may also be empty for error response codes.)
print resp.bodyStr() + "\n";