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Info

message.getBody() is not available within the JavaScript Script Pre-Processing Task. Only header values can be extracted/set.

API

Notes

message.getAllHeaders()

Get all headers of a message.

message.getHeader(name)

Get value of a message header

Parameters

  • name the name of the header to get

message.setHeader(key, value)

Set the value of a message header

Parameters

  • key (String) the name of the header to set

  • value (String) the value of the header to set

print(str)

Adds output that is recorded during execution and shown in the processing report.

Parameters

  • str (String) the string to be recorded

setOutcome(outcome, reason)

Set the processing outcome of the script

Parameters

  • outcome (String) the outcome type available outcome values: DROP, IGNORE, FORWARD

  • reason (String) the reason for the outcome

assert

See below. https://nodejs.org/api/assert.html

RegExp

Regular expressions can be evaluated within the script. This is often used for searches within string values for matching content. See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp for more information.

Assertions

Textual Assertions

See https://nodejs.org/api/assert.html for full Assert API documentation.

Textual Assertions

Code Block
assert.equal('The actual value', 'An expected value', 'Helpful message');

...

Running the above Test Script example against any email will produce the following output :

...

If (if you do not with to provide a message you can simply omit it.)

Code Block
assert.equal('The actual value', 'An expected value');

...

Code Block
assert.equal(message.getHeader('subject'), 'test subject', 'The email subject was not as expected');

In the example email, the Subject is not the expected one, and therefore the following output will be produced:

...

Script examples

Adding an email address to your emails

Script:

Code Block
var to = message.getHeader('to');
var newTo = to + ', someone@example.com';
message.setHeader('to', newTo);

Example Email:

Code Block
MIME-Version: 1.0
Received: by 10.223.112.12 with HTTP; Sat, 18 Jun 2011 22:42:26 -0700 (PDT)
Date: Sun, 19 Jun 2011 17:42:26 +1200
Subject: CHANGE_SUBJECT!!!
From: andy@thepluginpeople.com
To: test@example.com
Content-Type: text/plain; charset=UTF-8

CHANGE BODY!!!

Test Script:

You can assert the test case after it is processed by your script, by using the following assert. You should see that the email will have two “to” addresses, the original email address and the one the script adds.

Code Block
assert.equal(message.getHeader('to'), 'test@example.com, someone@example.com', 'Example message');

Detecting a missing From address and adding it to the email

Script:

Code Block
var from = message.getHeader('from'); //Extracts the Value found within the From header
if (from == null) { //Checks if From address is missing
    message.setHeader('from', 'newaddress@example.com'); //Sets the From address
}

Test Script:

The following assert will check that the From address is now set correctly.

Code Block
assert.equal(message.getHeader('from'), 'newaddress@example.com', 'Example message');

Replacing the From address

This example shows how to manipulate the From address, to detect one domain and swap it out for another.

Script:

Code Block
var original = message.getHeader('from').toLowerCase(); //Extracts the Value found within the From header
if (original.endsWith('@thepluginpeople.com')) { //Checks if sender address is a specific address
    var name = original.split('@')[0];
    message.setHeader('from',name + '@replaced.com'); //Changes original from address to be the extracted name and email address
}

Example Email:

Code Block
MIME-Version: 1.0
Received: by 10.223.112.12 with HTTP; Sat, 18 Jun 2011 22:42:26 -0700 (PDT)
Date: Sun, 19 Jun 2011 17:42:26 +1200
Subject: CHANGE_SUBJECT!!!
From: ryan@thepluginpeople.com
To: test@example.com
Content-Type: text/plain; charset=UTF-8

CHANGE BODY!!!

Test Script:

Code Block
assert.equal(message.getHeader('from'), 'ryan@replaced.com', 'Example message');

Processing Report:

Here you can see the example mail processing report generated by JEMHC for our support project. A user would have been associated if it didn’t exist, in this case we’ve simply created a new portal user.

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Extracting an address from the name part and setting it as the From address

If you are receiving emails that are sent from a system address with a personal part that contains the actual sender address, the script below will extract the actual sender address from the original personal part and will set this value as the sender of the email, so that it can be processed correctly.

Example Script:

Code Block
var original = message.getHeader('from').toString(); //Extracts the Value found within the From header
if (original.includes('system@external.com')) { //Checks if sender address is a specific address
    var address = original.substring(original.indexOf('(') + 1, original.indexOf(')')).trim(); //Extracts the address from between the two brackets "("")"
    var personal = original.substring(original.indexOf('"') + 1, original.indexOf('(')).trim(); //Extracts the real senders personal part (Name)
    message.setHeader("from", '"' + personal + '" ' + '<' + address + '>'); //Changes original from address to be the extracted name and email address
}

Example Test Case:

Code Block
MIME-Version: 1.0
Received: by 10.223.112.12 with HTTP; Sat, 18 Jun 2011 22:42:26 -0700 (PDT)
Date: Sun, 19 Jun 2011 17:42:26 +1200
Subject: CHANGE_SUBJECT!!!
From: "ryan example (ryan@example.com)" <system@external.com>
To: test@test.com
Content-Type: text/plain; charset=UTF-8

CHANGE BODY!!!

Test Script:

Code Block
assert.equal(message.getHeader("from"), '"ryan example" <ryan@example.com>', 'Example message');

Processing Report:

Here you can see the example mail processing report generated by JEMHC for this Test Case. A user would have been associated if it didn’t exist, in this case we’ve simply created a new portal user with the correct email address and name.

...

Using Regex to extract a specific value from the subject and set as a new header value

If you want to retrieve specific text from the email subject then you can do so by searching the email subject with a Regular Expression that will extract the matching values. The below example will search the email subject for specific content and if found it will then set the value to the relevant email header.

Example Script:

Code Block
var pattern = new RegExp("example:\\s([0-9]+)").exec(message.getSubject());
if (pattern !== null)
{
    print("Matched Value: " + pattern[1]);
    message.setHeader('example', pattern[1]);
}

Example Test Case:

Code Block
MIME-Version: 1.0
Received: by 10.223.112.12 with HTTP; Sat, 18 Jun 2011 22:42:26 -0700 (PDT)
Date: Sun, 19 Jun 2011 17:42:26 +1200
Subject: CHANGE_SUBJECT!!! example: 10
From: "ryan example (ryan@example.com)" <system@external.com>
To: test@test.com
Content-Type: text/plain; charset=UTF-8

This is the email body

Test Script:

Code Block
assert.equal(message.getHeader("example"), '10', 'example header value not found');