Add workaround for anchor links (#367)

Bug in libcurl 8.11.1 and lower: curl/curl#15836

R/parser.R

@@ -67,6 +67,12 @@ curl_parse_url <- function(url, baseurl = NULL, decode = TRUE, params = TRUE){
   stopifnot(is.character(url))
   stopifnot(length(url) == 1)
   baseurl < as.character(baseurl)
+
+  # Workaround for #366
+  if(length(baseurl) && substr(url, 1, 1) == '#'){
+    url <- sub('(#.*)?$', url, baseurl)
+  }
+
   result <- .Call(R_parse_url, url, baseurl)
   if(inherits(result, 'ada')){
     result <- normalize_ada(result)

tests/testthat/test-parser.R

@@ -13,11 +13,13 @@ test_that("Basic URL parser",{
 })
 
 test_that("Relative links need a baseurl",{
-  base <- 'https://jerry:secret@google.com:888/foo/bar#nothing'
+  base <- 'https://jerry:secret@google.com:888/foo/bar?x=1#nothing'
   out1 <- curl_parse_url("/test1", base) #NB: curl does but ADA does not have nice error messages
   out2 <- curl_parse_url("./test2", base)
+  out3 <- curl_parse_url("#bla", base)
   expect_equal(out1$url, "https://jerry:secret@google.com:888/test1")
   expect_equal(out2$url, "https://jerry:secret@google.com:888/foo/test2")
+  expect_equal(out3$url, "https://jerry:secret@google.com:888/foo/bar?x=1#bla")
   expect_error(curl_parse_url("/test1"))
   expect_error(curl_parse_url("./test2"))
 })
@@ -49,4 +51,3 @@ test_that("Decoding parameters", {
   out <- curl_parse_url('https://www.test.com/bla?tv=tom%26jerry&math=1%2B1+%3D+2&empty')
   expect_equal(out$params, c(tv = "tom&jerry", math = "1+1 = 2", empty = ""))
 })
-