QueueTrigger Bindings for Sendgrid -Python - python-3.x

Question

Guided by this post I have written the following queuetrigger code intended to send emails when a message is queued.
import logging
import sendgrid
import azure.functions as func
import os
def main(msg: func.QueueMessage) -> None:
logging.info('Python queue trigger function processed a queue item: %s',
msg.get_body().decode('utf-8'))
data = {
"personalizations": [
{
"to": [
{
"email": "rrrrrrrr"
}
],
"subject": "Sending with SendGrid is Fun"
}
],
"from": {
"email": "ghyu"
},
"content": [
{
"type": "text/plain",
"value": "and easy to do anywhere, even with Python"
}
]
}
print('Sending email using SendGrid:', data)
with open(os.environ[_AZURE_FUNCTION_SENDGRID_OUTPUT_ENV_NAME], 'wb') as f:
json.dump(data,f)
function.json
{
"scriptFile": "__init__.py",
"bindings": [
{
"name": "msg",
"type": "queueTrigger",
"direction": "in",
"queueName": "outqueue1",
"connection": "storageaccountautom92bb_STORAGE"
},
{
"name": "outputMessage",
"type": "sendGrid",
"from": "ghyu",
"apiKey": "MY_SENDGRID_API_KEY",
"direction": "out"
}
],
"disabled": false
}
local.settings.json
{
"IsEncrypted": false,
"Values": {
"AzureWebJobsStorage": "hjk",
"FUNCTIONS_WORKER_RUNTIME": "python",
"storageaccountautom92bb_STORAGE": "hjk",
"MY_SENDGRID_API_KEY": "tyhuE",
"_AZURE_FUNCTION_SENDGRID_OUTPUT_ENV_NAME" : "GIS klop",
"_AZURE_FUNCTION_QUEUE_INPUT_ENV_NAME" : "msg"
}
}
Whereas the function responds to messages as they queue, it is not able to send emails. It throws an error;
the following parameters are declared in function.json but not in Python: {'outputMessage'}
How best can I resolve this?
Are the outward bindings correct?

Answer 1

Azure Function banned the port of send email, so we must use sendgrid to send email.(This is a third part tools but it was been integrated into azure functions binding, so we can directly use it.)
For example, if you want to send email from email A to email B.
First, go to the sendgrid website, create a sender and verify the email A:
After that, email A is ready to send emails by sendgrid.
Now we need to generate a SendGrid API key and copy and store the API key:(This will be filled in the Values section of local.settings.json as an environment variable to read.)
Then, you can use it to send emails:
host.json
{
"version": "2.0",
"logging": {
"applicationInsights": {
"samplingSettings": {
"isEnabled": true,
"excludedTypes": "Request"
}
}
},
"extensionBundle": {
"id": "Microsoft.Azure.Functions.ExtensionBundle",
"version": "[1.*, 3.1.0)"
}
}
local.settings.json
{
"IsEncrypted": false,
"Values": {
"AzureWebJobsStorage": "DefaultEndpointsProtocol=https;AccountName=0730bowmanwindow;AccountKey=xxxxxx;EndpointSuffix=core.windows.net",
"FUNCTIONS_WORKER_RUNTIME": "python",
"SendGrid_API_Key": "SG._-yYnhzER2SEbAvzOxSHnA.xxxxxx",
"0730bowmanwindow_STORAGE": "DefaultEndpointsProtocol=https;AccountName=0730bowmanwindow;AccountKey=xxxxxx;EndpointSuffix=core.windows.net"
}
}
function.json
{
"scriptFile": "__init__.py",
"bindings": [
{
"name": "msg",
"type": "queueTrigger",
"direction": "in",
"queueName": "myqueue",
"connection": "0730bowmanwindow_STORAGE"
},
{
"type": "sendGrid",
"name": "sendGridMessage",
"direction": "out",
"apiKey": "SendGrid_API_Key",
"from": "emailA#emailA.com"
}
]
}
__init__.py
import logging
import json
import azure.functions as func
def main(msg: func.QueueMessage, sendGridMessage: func.Out[str]) -> None:
logging.info('Python queue trigger function processed a queue item: %s',
msg.get_body().decode('utf-8'))
value = "Sent from Azure Functions"
message = {
"personalizations": [ {
"to": [{
"email": "emailB#emailB.com"
}]}],
"subject": "Azure Functions email with SendGrid",
"content": [{
"type": "text/plain",
"value": value }]
}
sendGridMessage.set(json.dumps(message))
After that, I send a message to 'myqueue', and emailB get the email:
By the way, this can only guarantee successful delivery, because some mailboxes refuse to accept mail sent through sendgrid. In this case, you will still get a 200 response, but the recipient will not receive the mail.(In this case, the recipient needs to go to the mailbox settings to lift the relevant restrictions.)