scrape_urls: scrape_urls: Scraping Urls from the Internet Archive

In archiveRetriever: Retrieve Archived Web Pages from the 'Internet Archive'

scrape_urls: Scraping Urls from the Internet Archive

Description

scrape_urls scrapes Urls of mementos and lower-level web pages stored in the Internet Archive using XPaths as default

Usage

scrape_urls(
  Urls,
  Paths,
  collapse = TRUE,
  startnum = 1,
  attachto = NULL,
  CSS = FALSE,
  archiveDate = FALSE,
  ignoreErrors = FALSE,
  stopatempty = TRUE,
  emptylim = 10,
  encoding = "UTF-8",
  lengthwarning = TRUE
)

Arguments

Urls	A character vector of the memento of the Internet Archive
Paths	A named character vector of the content to be scraped from the memento. Takes XPath expressions as default.
collapse	Collapse matching html nodes
startnum	Specify the starting number for scraping the Urls. Important when scraping breaks during process.
attachto	Scraper attaches new content to existing object in working memory. Object should stem from same scraping process.
CSS	Use CSS selectors as input for the Paths
archiveDate	Retrieve the archiving date
ignoreErrors	Ignore errors for some Urls and proceed scraping
stopatempty	Stop if scraping does not succeed
emptylim	Specify the number of Urls not being scraped until break-off
encoding	Specify a default encoding for the homepage. Default is 'UTF-8'
lengthwarning	Warning function for large number of URLs appears. Set FALSE to disable default warning.

Value

This function scrapes the content of mementos or lower-level web pages from the Internet Archive. It returns a tibble including Urls and the scraped content. However, a memento being stored in the Internet Archive does not guarantee that the information from the homepage can be actually scraped. As the Internet Archive is an internet resource, it is always possible that a request fails due to connectivity problems. One easy and obvious solution is to re-try the function.

Examples

## Not run: 
scrape_urls(
Urls = "https://web.archive.org/web/20201001000859/https://www.nytimes.com/section/politics",
Paths = c(title = "//article/div/h2//text()", teaser = "//article/div/p/text()"),
collapse = FALSE, archiveDate = TRUE)


## End(Not run)

archiveRetriever documentation built on Dec. 28, 2022, 2:54 a.m.