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A comment on Show HN: Jam API, turn any site into a JSON api using CSS selectors. Parent comment

Re:Show HN: Jam API, turn any site into a JSON api using CSS... by diggan on Thursday April 28, 2016 @06:26AM (#11587681)
If you're running the example on the website/in a browser, it's probably CORS stopping you.

Try using a backend language or just curl and it should be fine.

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Re:Show HN: Jam API, turn any site into a JSON api using CSS... by WA on Thursday April 28, 2016 @06:38AM (#11587734)
Well no, because my browser isn't doing the request. The underlying Node app (the Jam API) does it.

I found it: The API responds with an HTTP 500 error if you use CSS selectors that don't select anything or are simply invalid.

Probably makes sense to add some Exception handling right there.

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Re:Show HN: Jam API, turn any site into a JSON api using CSS... by gavino on Thursday April 28, 2016 @06:46AM (#11587777)
I had been trying to figure out what would be causing this issue, thanks for pointing it out, I've pushed a fix real quick that will respond whether JSON is invalid or a CSS selector wasn't found on the provided URL.
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