function that find lyrics in chartlyrics API

find_lyrics.R

library(httr)
library(RCurl)
library(XML)

df <- data.frame(artist = c('Led Zeppellin', 'Adele'), song = c('Rock´n roll', 'Hello'), stringsAsFactors = F)

make.querrye <- function(xx) {
  names_ok <- gsub(" ", "&", xx)
  names_ok2 <- paste("\'", names_ok, "\'", sep = '')
 querrye <- paste("http://api.chartlyrics.com/apiv1.asmx/SearchLyricDirect?artist=", names_ok[1],"&song=",  names_ok[2], sep='')
 data <- GET(querrye)
 aa <- content(data, "text")   
 doc <- htmlParse(aa, asText=TRUE)  
 plain.text <- xpathSApply(doc, "//lyric//text()[not(ancestor::script)][not(ancestor::style)][not(ancestor::noscript)][not(ancestor::form)]", xmlValue)  
 if (length(plain.text)==0) {
   plain.text2 <- 'Lyrics not found'
 } else {
   plain.text2 <- iconv(plain.text, from = "UTF-8", to = "latin1", sub = NA, mark = TRUE, toRaw = FALSE)  
 }
 return(plain.text2)
 }


names <- c(df$artist[1], df$song[1])
make.querrye(names) #- it works

names <- c(df$artist[2], df$song[2])
make.querrye(names) #- it also works