Скачать или смотреть How to Write Data from a Loop to a JSON File in Bash

Learn how to create a Bash script that fetches certificate expiration data and writes it in `JSON` format to a file.
---
This video is based on the question https://stackoverflow.com/q/77281480/ asked by the user 'ElRamos' ( https://stackoverflow.com/u/22727708/ ) and on the answer https://stackoverflow.com/a/77281802/ provided by the user 'pmf' ( https://stackoverflow.com/u/2158479/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How can I write the data received after the loop to a json file?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Write Data from a Loop to a JSON File in Bash

Creating a script that gathers information about certificates and formats it into JSON can seem daunting. If you're wrestling with how to write the data received after a loop into a JSON file, you're not alone. This guide will guide you through the steps needed to accomplish this task effectively. By the end, you'll have a clear understanding of how to generate a list of certificates that will expire in the coming month and save it in JSON format.

Problem Overview

Suppose you need to monitor certificates and receive data that outlines their expiration dates and serial numbers. You want to take this information, which you retrieve from an API using curl, and format it into a JSON object that looks like this:

[[See Video to Reveal this Text or Code Snippet]]

Solution Outline

To solve this problem, we will break it down into clear, manageable steps:

Fetch the List of Certificate Keys: Use curl to get the key list.

Iterate Over the Keys: Loop through each certificate key to fetch the corresponding expiration data.

Format Data into JSON: Structure the final output as a JSON object.

Output the Result: Save or display the JSON data.

Step 1: Fetch the List of Certificate Keys

Start by fetching the list of certificate keys from the server. You will use the curl command along with jq to extract the keys.

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Iterate Over the Keys

Now, loop over the certificate keys you just fetched. Inside the loop, you'll make another API call to retrieve the expiry date and serial number for each certificate.

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Format Data into JSON

With all certificate data collected, you can now format it into JSON. jq will help you wrap the list into a well-structured JSON object.

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Output the Result

Finally, print the resulting JSON or redirect it to a file as required.

[[See Video to Reveal this Text or Code Snippet]]

Final Script

Putting it all together, your complete Bash script will look as follows:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By following these steps, you can easily create a Bash script to fetch certificate expiration data and format it into JSON. With the right commands and structure, you can not only read this important data but also save it in a standardized format for future use! Happy scripting!