Can rjsoncons support `json.gz` URLs?

[LiNk-NY]

Hi Martin! @mtmorgan

I started using rjsoncons for https://github.com/waldronlab/ImageFeatureTCGA and I was wondering if rjsoncons could be slightly modified to work directly with json.gz URLs.
I noticed that if I download the file locally and use j_query(data = <...json.gz>) it works well. I suppose that the file would still have to get downloaded and decompressed if the data input were a URL. I could implement that layer but perhaps rjsoncons could do it more efficiently?

Here is an example URL: https://store.cancerdatasci.org/hovernet/TCGA_OV/json/TCGA-57-1582-01Z-00-DX1.BDF02DAA-E520-46BD-A479-58CAA4354B1A.json.gz

[mtmorgan]

Hey @LiNk-NY

I think j_data_type() returnsc("json", "url") as possible type, and

json = j_query(url, data_type = c("json", "url"))

seems to work? There is something in the examples vignette. In that example the data type is actually inferred from the URL without needing to specify j_data_type(), and maybe j_data_type() could be improved to handle the compression? A pull request clarifying the docs would also be great!

It would be expensive to make multiple queries, so it might be better to implement something with a cache on your end.

[LiNk-NY]

Thanks Martin, @mtmorgan, I created #5 for your review.