Need to access Google Custom search api through R

问题

How do I use R to do a Google Custom search? I have the custom search engine id and the api key. I currently try to do this:

getURL("https://www.googleapis.com/customsearch/v1?key=API_KEY&cx=ENGINE_ID&q=searchterm")

and I get the following error:

Error in function (type, msg, asError = TRUE) : SSL certificate problem: unable to get local issuer certificate

Though I am able to get the results in json when I do a get request in the browser. Any clue on whats happening?

回答1:

httr package worked!!

library(httr)
query="https://www.googleapis.com/customsearch/v1?key=API_KEY&cx=ENGINE_ID&q=SEARCH_TERM"
content(GET(query))

回答2:

set ssl.verifypeer=TRUE in getURL

getURL("https://www.googleapis.com/customsearch/v1?key=API_KEY&cx=ENGINE_ID&q=searchterm", ssl.verifypeer=TRUE)

来源：https://stackoverflow.com/questions/30246787/need-to-access-google-custom-search-api-through-r