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Since it is easy in R, I am using rvest package to parse HTML to extract informations from website.
I am wondering what's my User-Agent (if there is any) during the request, since User-Agent is assigned to the internet browser or is there a way to set it somehow?
My code that open session and extract informations from HTML is below:
library(rvest)
se <- html_session( "http://www.wp.pl" ) %>%
html_nodes("[data-st-area=Glonews-mozaika] li:nth-child(7) a") %>%
html_attr( name = "href" )
549
Besides a browser, a user agent could be a bot scraping webpages, a download manager, or another app accessing the Web. Along with each request they make to the server, browsers include a self-identifying User-Agent HTTP header called a user agent (UA) string.
rvest helps you scrape (or harvest) data from web pages. It is designed to work with magrittr to make it easy to express common web scraping tasks, inspired by libraries like beautiful soup and RoboBrowser.
In general, web scraping in R (or in any other language) boils down to the following three steps: Get the HTML for the web page that you want to scrape. Decide what part of the page you want to read and find out what HTML/CSS you need to select it. Select the HTML and analyze it in the way you need.
I used https://httpbin.org/user-agent to find out:
library(rvest)
se <- html_session( "https://httpbin.org/user-agent" )
se$response$request$options$useragent
Answer:
[1] "libcurl/7.37.1 r-curl/0.9.1 httr/1.0.0"
See this bug report for a way to override it.
60
I found this somewhere in a tutorial, it looks like an easier faster way to do it:
uastring <- "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36"
session <- html_session("https://www.linkedin.com/job/", user_agent(uastring))
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