Tcl
Send GMail using REST API

Demonstrates how to send an email using the GMail REST API.
Chilkat Tcl Downloads

Tcl

load ./chilkat.dll

set success 0

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

# Use the Chilkat Email API to create or load an email.
set email [new_CkEmail]

# The From name/address don't need to be specified. 
# GMail will automatically use your Gmail address if the following 2 lines are omitted.
CkEmail_put_FromName $email "My Name"
CkEmail_put_FromAddress $email "my_account_name@gmail.com"

CkEmail_AddTo $email "John Smith" "somebody@somewhere.com"
# To add more recipients, make additional calls to AddTo or AddCC, one per recipient...

CkEmail_put_Subject $email "This is a test GMail email created using Chilkat."
CkEmail_put_Charset $email "utf-8"
CkEmail_AddPlainTextAlternativeBody $email "This is a test"

# Create an HTML email body with an embedded image.
set cid [CkEmail_addRelatedFile $email "qa_data/jpg/starfish.jpg"]
set sbHtml [new_CkStringBuilder]

CkStringBuilder_Append $sbHtml "<html><body>This is a <b>test</b><br><img src=\"cid:STARFISH_CID\"/></body></html>"
set numReplacements [CkStringBuilder_Replace $sbHtml "STARFISH_CID" $cid]

CkEmail_AddHtmlAlternativeBody $email [CkStringBuilder_getAsString $sbHtml]

# OK.. we now have an HTML email with an embedded JPG image
# We'll need to get the full MIME of the email encoded to a base64url string.
set sbMime [new_CkStringBuilder]

CkEmail_GetMimeSb $email $sbMime
CkStringBuilder_Encode $sbMime "base64url" "utf-8"

# The body of the HTTP request will be JSON..
set json [new_CkJsonObject]

CkJsonObject_UpdateSb $json "raw" $sbMime

# Send the email...
set http [new_CkHttp]

CkHttp_put_AuthToken $http "GMAIL-ACCESS-TOKEN"

set url "https://www.googleapis.com/gmail/v1/users/me/messages/send"
set resp [new_CkHttpResponse]

set success [CkHttp_HttpJson $http "POST" $url $json "application/json" $resp]
if {$success == 0} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkEmail $email
    delete_CkStringBuilder $sbHtml
    delete_CkStringBuilder $sbMime
    delete_CkJsonObject $json
    delete_CkHttp $http
    delete_CkHttpResponse $resp
    exit
}

# A status code of 200 indicates success.
puts "Response status code: [CkHttpResponse_get_StatusCode $resp]"
puts "Response body:"
puts [CkHttpResponse_bodyStr $resp]

# The response body contains JSON.
# Use the online tool at Generate JSON Parsing Code
# to generate JSON parsing code.

# A sample successful JSON response:

# {
#  "id": "166f0d4ac39e50bf",
#  "threadId": "166f0d4ac39e50bf",
#  "labelIds": [
#   "SENT"
#  ]
# }

delete_CkEmail $email
delete_CkStringBuilder $sbHtml
delete_CkStringBuilder $sbMime
delete_CkJsonObject $json
delete_CkHttp $http
delete_CkHttpResponse $resp