To address the problem of special characters use base64 encoding for variable values as this encoding results in a single printable string.
To address the limitation concerning the size of environment variables do not use them and think about ways how to directly append lines to the temporary file indicated by JS7_RETURN_VALUES.
Display feature availability
StartingFromRelease 2.2.0

Example

Let's assume two jobs to be executed in sequence:

The first job creates a lengthy e-email body in HTML format,

The second job sends e-mail and makes use of the HTML body. Find a number of possible implementations for the JS7 job script:

Code Block

language	bash
title	Example for Shell version using environment variables on Unix

#!/user/bin/env bash

mailBody="<html><body><b>hello</b> <i>world</i></body></html>"
mailBodyEncoded=$(echo $mailBody | base64)
echo "body=base64:$mailBodyEncoded" >> $JS7_RETURN_VALUES

Code Block

language	bash
title	Example for Shell version using files on Unix

#!/user/bin/env bash

echo "<html><body><b>hello</b> <i>world</i></body></html>" > /tmp/mail-body.html
echo "body=base64:$(cat /tmp/mail-body.html | base64)" >> $JS7_RETURN_VALUES

Code Block

language	bash
title	Example for PowerShell version on Unix

#!/usr/bin/env pwsh

$mailBody = "<html><body><b>hello</b> <i>world</i></body></html>"
$mailBodyEncoded = [System.Convert]::ToBase64String([System.Text.Encoding]::UTF8.GetBytes( $mailBody ))
"body=base64:$mailBodyEncoded" | Out-File $env:JS7_RETURN_VALUES -Append

Code Block

title	Example for PowerShell version on Windows (multi-line)

@@findstr/v "^@@f.*&" "%~f0"|pwsh.exe -&goto:eof

$mailBody = "<html><body><b>hello</b> <i>world</i></body></html>"
$mailBodyEncoded = [System.Convert]::ToBase64String([System.Text.Encoding]::UTF8.GetBytes( $mailBody ))
"body=base64:$mailBodyEncoded" | Out-File $env:JS7_RETURN_VALUES -Append

Code Block

title	Example for PowerShell version on Windows (single-line)

pwsh.exe -NoLogo -NonInteractive -Command "& { ""body=base64:$([System.Convert]::ToBase64String([System.Text.Encoding]::UTF8.GetBytes( '<html><body><b>hello</b> <i>world</i></body></html>' )) )"" | Out-File $env:JS7_RETURN_VALUES -Append }"

Explanation:

In fact the e-mail body is not too lengthy, however, it suggests that an e-mail body of arbitrary size would be imported by some template file as e.g. for PowerShell with $mailBody = Get-Content "mail-body.html"
- The above bash version with files and the PowerShell version both work with arbitrary length values.
Base64 encoding is available from a number of sources such as the base64 Unix utility or the .NET Core class.
The value of the body variable is prefixed with base64: to indicate the encoding.
The subsequent JS7 - JITL MailJob accepts the body variable, identifies the encoding and automatically decodes the argument value.

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