r - Follow links in a loop with rvest -


i'm trying learn rvest package, documentation , examples on web either basic or complex. not find how use follow_link function in loop browse number of pages. perhaps did not understand logic @ all...

here simplified example of attempt:

library(rvest)  url <-   "https://www.wikidata.org/w/index.php?title=special:whatlinkshere/q5&limit=500"  s <- html_session(url)  liste <- list() (i in 1:2) {   data <-     s %>%     read_html() %>%     html_nodes("#mw-whatlinkshere-list li")    result <- c(liste, data)    s <- s %>%      follow_link(xpath = "//a[text()='next 500']/@href")  }

i've tried avoid jump_link, : it's better, i'm not sure best , fastest solution :

liste <- c() while (!is.na(url)) {   data <-     url %>%     read_html() %>%     html_nodes("#mw-whatlinkshere-list li")     liste <- c(liste, data)    url <- url %>%      read_html() %>%      html_node(xpath = "//a[text()='next 500']") %>%      html_attr("href") %>%      paste0("https://www.wikidata.org", .)     print(url)   }

any advice welcome , appreciated.


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