Taking Base64 Encoded PDF Data from Json Content, Decoding It, and Returning It to Be Displayed or Downloaded in Browser

Decoding PDF content encoded as base64 in service response with Groovy script and returning it to be displayed or downloadable in browser

Example Response Data

{"pdf":"<BASE64_ENCODED_DATA>"}

Displaying in Browser

import groovy.json.JsonSlurper
import java.util.Base64

def slurper = new JsonSlurper()
def parsedJson = slurper.parseText(responseBodyTextFromTargetAPI)
def pdfAsBase64 = parsedJson.data;

responseBodyTextToClient = new String(Base64.decoder.decode(pdfAsBase64), "UTF-8")
responseHeaderMapToClient.put("Content-Type", "application/pdf")
responseHeaderMapToClient.put("Content-Disposition", "inline")

Not every web browser may provide this display.

PDF Download Operation

import groovy.json.JsonSlurper
import java.util.Base64

def slurper = new JsonSlurper()
def parsedJson = slurper.parseText(responseBodyTextFromTargetAPI)
def pdfAsBase64 = parsedJson.data;

responseBodyTextToClient = new String(Base64.decoder.decode(pdfAsBase64), "UTF-8")
responseHeaderMapToClient.put("Content-Type", "application/pdf")
responseHeaderMapToClient.put("Content-Disposition", "attachment")

In both operations, it should be verified that the PDF content is reflected correctly. This script should be run on the response line (Response Policy).