As defined in RFC2616, http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3, there are three valid formats:

  • Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123

  • Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036

  • Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() format

parse_http_date(x, failure = structure(NA_real_, class = "Date"))

http_date(x)

Arguments

x

For parse_http_date, a character vector of strings to parse. All elements must be of the same type.

For http_date, a POSIXt vector.

failure

What to return on failure?

Value

A POSIXct object if succesful, otherwise failure

Examples

parse_http_date("Sun, 06 Nov 1994 08:49:37 GMT")
#> [1] "1994-11-06 08:49:37 GMT"
parse_http_date("Sunday, 06-Nov-94 08:49:37 GMT")
#> [1] "1994-11-06 08:49:37 GMT"
parse_http_date("Sun Nov 6 08:49:37 1994")
#> [1] "1994-11-06 08:49:37 GMT"
http_date(Sys.time())
#> [1] "Mon, 17 Dec 2018 20:44:48 GMT"