Hacker News: dhuan_

New comment by dhuan_ in "Ask HN: What are you working on? (May 2026)"

dhuan_ — Sun, 10 May 2026 23:11:37 +0000

I have been working on two opensource tools:

https://dhuan.github.io/mock/latest/examples.html Command line utility that lets you build APIs with just one command.

https://github.com/dhuan/dop JSON/YAML manipulation with AWK style approach.

New comment by dhuan_ in "Lute: A Standalone Runtime for Luau"

dhuan_ — Sat, 25 Apr 2026 22:00:19 +0000

well done! wouldn't it nice if something like this existed in Lua as well (or maybe it does and I haven't seen it yet)?

I've built a data transforming tool powered by Lua[1] and would definitely like to benefit from an general purpose api/library like Lute.

1: https://github.com/dhuan/dop

New comment by dhuan_ in "Ask HN: What Are You Working On? (April 2026)"

dhuan_ — Sun, 12 Apr 2026 23:21:01 +0000

I have been working on two opensource tools:

https://dhuan.github.io/mock/latest/examples.html

^Command line utility that lets you build APIs with just one command.

https://github.com/dhuan/dop

^JSON/YAML manipulation with AWK style approach.

New comment by dhuan_ in "Ask HN: What are you building that's not AI related?"

dhuan_ — Thu, 09 Apr 2026 09:02:40 +0000

I have been working on two opensource tools:

https://dhuan.github.io/mock/latest/examples.html

^Command line utility that lets you build APIs with just one command.

https://github.com/dhuan/dop

^JSON/YAML manipulation with AWK style approach.

New comment by dhuan_ in "Ask HN: What dev tools do you rely on that nobody talks about?"

dhuan_ — Wed, 01 Apr 2026 19:44:21 +0000

For me it has to be mock. With it I can create and automate APIs easily.

https://dhuan.github.io/mock/latest/examples.html

Show HN: Dop, Awk-like processing for JSON/YAML/TOML with Lua

dhuan_ — Fri, 27 Mar 2026 19:20:17 +0000

dop reads JSON, YAML, or TOML from stdin, walks the structure field by field, and lets you transform values with Lua. It can also query nested paths and convert between formats.

It weights just 800kb and you don't need Lua installed in your pc.

A few examples:

echo '{"list":[1,2,3]}' | dop -e ' if type(VALUE) == "number" then set(VALUE * 2) end ' # => {"list":[2,4,6]}

echo '{"data":{"some_list":[1,2,3]}}' | dop -q data.some_list # => [1,2,3]

What I wanted was: - something simpler to reason about for non-trivial transforms - one tool for JSON/YAML/TOML - embedded scripting without needing Lua installed separately

Repo: https://github.com/dhuan/dop

Any feedback is welcome.

Comments URL: https://news.ycombinator.com/item?id=47547070

Points: 2

# Comments: 1

New comment by dhuan_ in "A Faster Alternative to Jq"

dhuan_ — Fri, 27 Mar 2026 19:18:06 +0000

I agree, even trivial tasks require us to go back to jq's manual to learn how to write their language.

this and other reasons is why I built: https://github.com/dhuan/dop

New comment by dhuan_ in "Ask HN: What Are You Working On? (March 2026)"

dhuan_ — Mon, 09 Mar 2026 00:49:11 +0000

mock, an API creation and testing utility. Any feedback is welcome.

https://dhuan.github.io/mock/latest/examples.html

New comment by dhuan_ in "Ask HN: What are you working on? (January 2026)"

dhuan_ — Sun, 11 Jan 2026 23:42:17 +0000

mock, an API creation and testing utility. Any feedback is welcome!

https://dhuan.github.io/mock/latest/examples.html

New comment by dhuan_ in "Charles Proxy"

dhuan_ — Sat, 20 Dec 2025 11:36:50 +0000

I’ve found tools like Charles really useful for understanding what’s happening on the wire. When I need something more repeatable (tests, offline work), I usually reach for a mock server instead. I ended up building a small one for my own use and later open-sourced it:

https://dhuan.github.io/mock/latest/examples.html

New comment by dhuan_ in "Ask HN: What Are You Working On? (December 2025)"

dhuan_ — Sun, 14 Dec 2025 21:19:01 +0000

mock, an API creation and testing utility. Any feedback is welcome!

https://dhuan.github.io/mock/latest/examples.html

New comment by dhuan_ in "An overly aggressive mock can work fine, but break much later"

dhuan_ — Mon, 17 Nov 2025 08:45:47 +0000

Great article. In addition, updating your mocking code can often be time-consuming. To try to make this easier, I built mock[1], which streamlines the process of setting up mock services for testing.

https://dhuan.github.io/mock/latest/examples.html

New comment by dhuan_ in "Ask HN: What Are You Working On? (Nov 2025)"

dhuan_ — Mon, 10 Nov 2025 13:00:45 +0000

mock, an API creation and testing utility. Any feedback is welcome!

https://dhuan.github.io/mock/latest/examples.html

New comment by dhuan_ in "Show HN: Command line YouTube downloader,a universal media solution for everyone"

dhuan_ — Sat, 08 Nov 2025 21:08:08 +0000

It's also possible create an HTTP service that acts as a wrapper to yt-dlp with just a few lines of shell, I created this example in the following link:

https://dhuan.github.io/mock/latest/examples.html#youtube-do...

New comment by dhuan_ in "Mock – An API creation and testing utility: Examples"

dhuan_ — Sun, 02 Nov 2025 15:31:23 +0000

Swagger is a tool for API design and documentation.

Mock on the other hand is an actual API creation utility with which you can define endpoints, execute some logic for each endpoint and then return some data to the client. There are other similar features which are covered in the user guide.

Mock is not: - A tool for API Specs or documentation - A GUI tool.

I admit explaining the usefulness of this tool is not the easiest thing.

Any feedback is welcome!

New comment by dhuan_ in "Mock – An API creation and testing utility: Examples"

dhuan_ — Sun, 02 Nov 2025 14:55:45 +0000

I think you intended to post here: https://news.ycombinator.com/item?id=45789474

New comment by dhuan_ in "Mock – An API creation and testing utility: Examples"

dhuan_ — Sun, 02 Nov 2025 13:23:01 +0000

Hi! Not yet, unless you use it with containers.

New comment by dhuan_ in "Mock – An API creation and testing utility: Examples"

dhuan_ — Sun, 02 Nov 2025 13:16:49 +0000

Hi, thanks for the feedback! I hope it's useful to you.

New comment by dhuan_ in "Mock – An API creation and testing utility: Examples"

dhuan_ — Sun, 02 Nov 2025 13:14:53 +0000

Hi, thanks for the feedback!

That's true, it's not a very unique name. I started building it, but only months later I thought of making it public. And then never thought of renaming it.

New comment by dhuan_ in "Mock – An API creation and testing utility: Examples"

dhuan_ — Sun, 02 Nov 2025 13:09:58 +0000

Hi thanks for the feedback checking out the project.

> What's the main motivation for creating this tool?

Similar tools exist out there for sure, but they are either complex (more than I wish they'd be) or somehow require you to use a specific programming languages. Mock lets you accomplish this without telling you which language you should use.

Also if you're using mock inside CI pipelines, it also helps the fact that you can just download a executable tool that does not require you the java platform or any other dependency.

> How hard/easy is it to make responses dynamic, i.e. to use something from the request data like query/path param or a body to execute function instead of hardcoding the response

With mock you can use shell scripts as "request handlers". With that said, capturing a query param or a JSON field from the request body is as simple as:

> $ USER_NAME=$(mock get-payload user.name)

> $ SOME_QUERY_STRING_PARAM=$(mock get-query foo)

You can see more of this topic here: https://dhuan.github.io/mock/shell_scripts.html

> I feel like every programming language have similar tool already - WireMock for Java etc. Why should people switch?

True. If people are happy with these tools and needing to use java (or any other lang the tool pulls you into), then there's not much reason to switch.