The easiest way to send emails in Cobol!
Installing Cobol, is now as easy as installing open-cobol in brew:
$ brew install open-cobol
In our COBOL example, we are using Environment Variables. You can set your own Environment Variables but following this link:
http://stackoverflow.com/questions/7501678/set-environment-variables-on-mac-os-x-lion
Set some SendGrid Credentials. $SENDGRID_USERNAME && $SENDGRID_PASSWORD.
In Cobol, we get Environment Variables and put them into variables, like so:
ACCEPT SG-AUTH-USERNAME FROM ENVIRONMENT "SENDGRID_USERNAME".
ACCEPT SG-AUTH-PASSWORD FROM ENVIRONMENT "SENDGRID_PASSWORD".
To send the email; call the function in libsendgrid send_email from cobol, and pass in the arguments. For an example on how to call this in the context of a complete Cobol application, look at the sendgrid_demo.cbl file in the root of the repo.
CALL "send_email" USING SG-AUTH-USERNAME SG-AUTH-PASSWORD
SG-MAIL-TO SG-MAIL-FROM
SG-MAIL-SUBJECT SG-MAIL-BODY-TEXT.
Save the cobol source, and open terminal and navigate to the directory of the source code. Then call these functions:
$ cobc -c -static sendgrid_demo.cbl
$ cobc -x -o sendgrid_demo sendgrid_demo.o libsendgrid.o
This will now produce a executable binary called sendgrid_demo in the same folder as your source code. To execute it, just run:
$ ./sendgrid_demo
If your email was sent, the output should look like this:
$ ./sendgrid_demo
Creating POST Payload... Done.
Sending POST Payload to SendGrid WebApi... Done. Email Sent.