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#' Convert an 'httr' call to 'curl' command line
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#'
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#' @param complete_httr_verb_call wrap an `httr` `VERB` call with this function
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#' and it will return the text of a working `curl` command line
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#' @param use_web_service if `TRUE` (`FALSE` by default) this function will use
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#' `https://curl.se/h2c/` to process the headers.
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#' @export
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#' @examples \dontrun{
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#' h2c(
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#' httr::GET(
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#' url = "https://rud.is/",
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#' httr::user_agent(splashr::ua_apple_tv),
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#' query = list(
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#' a = "b",
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#' c = 1
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#' )
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#' )
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#' )
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#' }
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h2c <- function(complete_httr_verb_call, use_web_service = FALSE) {
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ƒ_call <- substitute(complete_httr_verb_call)
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capture.output(
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capture.output(
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httr::with_verbose(
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eval(ƒ_call)
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), type = "message") -> res
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) -> junk
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out <- tempfile()
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res[grepl("^->", res)] %>%
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sub("^-> ", "", .) %>%
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paste0(collapse = "\n") -> res
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if (use_web_service) {
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httr::POST(
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url = "https://curl.se/h2c/",
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httr::user_agent("curl/7.64.1"),
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httr::accept("*/*"),
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httr::content_type("application/x-www-form-urlencoded"),
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body = sprintf("http=%s", curl::curl_escape(res)),
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encode = "raw"
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) -> res1
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trimws(rawToChar(res1$content))
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} else {
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writeLines(res, out)
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perl <- find_perl()
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args <- system.file("bin", "h2c.pl", package = "httr2curl")
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processx::run(
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command = perl,
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args = args,
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stdin = out
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) -> res
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trimws(res$stdout)
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}
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}
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