I am trying to process a API response, which is of type binary (please see screen shot of API response about how it looks). I want to perform validation of file contents post downloading/saving it to .docx file. Can any one point me in right direction on how we can achieve the same.
Great question. Handling binary responses in Postman, especially for files like .docx, should be straightforward once you get the hang of it 
Here’s a step-by-step guide to help you:
- Receiving Binary Responses:
- Ensure your request headers are set up to accept binary data (e.g.,
Accept: application/octet-stream). - Send the request and wait for the response. The response will look garbled or show up as unreadable text in Postman’s response viewer because it’s a binary representation of the
.docxfile.
- Saving the Binary Response:
- Once you’ve received the binary response, click on the “Save Response” button (or right-click in the response section).
- Choose “Save to a file”.
- Save the file with a
.docxextension to your desired location.
- Validating File Contents:
- Since
.docxfiles are essentially zipped XML files, you’ll need specialized libraries or tools to read and validate their contents programmatically. - If you just want to manually verify the contents, you can open the saved
.docxfile using Microsoft Word or a similar word processing software. - For automated validations, consider using libraries like mammoth.js (for JavaScript) or python-docx (for Python) in your test scripts outside of Postman.
Unfortunately, directly validating the contents of a .docx file within Postman’s scripting environment might be a challenge due to the complex nature of Word files. Most users validate such files outside Postman in a more robust development environment tailored to their needs.
Hope that helps! Let us know if you have any other questions.
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