Web scraping a table: Error using rvest and splash - r

Question

I am trying to scrape a table from this link (https://www.sac-isc.gc.ca/eng/1620925418298/1620925434679). I have tried two approaches so far:
Using rvest though I couldn't find HTML nodes on the page for the table
Using splash, assuming the page is being loaded dynamically
Neither of the approaches seem to be working for me. After hours of trying and reading posts/blogs, etc, I can't seem to figure out what I'm missing. Can someone please point me to the right direction or atleast tell me what I'm doing wrong? Thanks!
Scraping using rvest:
library(rvest)
loadedTable <- read_html("https://www.sac-isc.gc.ca/eng/1620925418298/1620925434679") %>%
html_nodes("table") %>%
html_table() %>%
as.tbl()
Error:
Error in matrix(unlist(values), ncol = width, byrow = TRUE) :
'data' must be of a vector type, was 'NULL'
Scraping using splashr:
library(splashr)
library(reticulate)
install_splash()
splash("localhost") %>% splash_active()
sp <- start_splash()
pg <- render_html(url = 'https://www.sac-isc.gc.ca/eng/1620925418298/1620925434679')
stop_splash(sp)
loadedTable1 <- pg %>%
html_node('table') %>%
html_table()
loadedTable1
Error:
Did not find required python module 'docker'
Error in curl::curl_fetch_memory(url, handle = handle) :
Failed to connect to localhost port 8050: Connection refused
Error in stop_splash(sp) : object 'sp' not found
Error in html_element(...) : object 'pg' not found
Error: object 'loadedTable1' not found

Answer 1

It is pulled dynamically from another URI. There is some work to do to write a process to extract just what you see on the page, or whatever you actually want to see, as there is a lot of info brought back, including all the more detail.
The unix timestamp on the end is largely about prevent cached results being served. You can generate that and sprintf it into the rest of the url.
library(jsonlite)
data <- jsonlite::read_json('https://www.sac-isc.gc.ca/DAM/DAM-ISC-SAC/DAM-WTR/STAGING/texte-text/lTDWA_map_data_1572010201618_eng.txt?date=1622135739812')
To access all info about First Nation Kapawe'no, for example, you would do the following:
print(data$data[82])