Created
April 15, 2013 16:39
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getLongURL.curl
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getLongURL.curl <- function(shorturl){ | |
# uses curl statement to get expanded url from t.co links (or any link) | |
# loop through until there's no location attribute... that's the long link. | |
newurl <- shorturl | |
url <- "" | |
while(url != newurl){ | |
data <- system(paste0("curl -I ", newurl), intern=T) | |
if(sum(grepl("location: ", tolower(data))) == 0){ | |
url <- newurl | |
}else{ | |
data <- subset(data, tolower(substring(data, 1, 9))=="location:") | |
stringurl <- substring(data[1], 11, nchar(data[1])-1) | |
# sometimes the location data isn't a url. | |
if(substring(stringurl, 1, 4)=="http"){ | |
newurl <- stringurl | |
}else{ | |
url <- newurl | |
} | |
} | |
} | |
return(newurl) | |
} |
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