verbose function

Give verbose output.

A verbose connection provides much more information about the flow of information between the client and server.

verbose(data_out = TRUE, data_in = FALSE, info = FALSE, ssl = FALSE)

Arguments

• data_out: Show data sent to the server.
• data_in: Show data recieved from the server.
• info: Show informational text from curl. This is mainly useful for debugging https and auth problems, so is disabled by default.
• ssl: Show even data sent/recieved over SSL connections?

Prefixes

verbose() uses the following prefixes to distinguish between different components of the http messages:

• * informative curl messages
• -\> headers sent (out)
• \>\> data sent (out)
• *\> ssl data sent (out)
• \<- headers received (in)
• \<\< data received (in)
• \<* ssl data received (in)

Examples

## Not run:

GET("http://httpbin.org", verbose())
GET("http://httpbin.org", verbose(info = TRUE))

f <- function() {
  GET("http://httpbin.org")
}
with_verbose(f())
with_verbose(f(), info = TRUE)

# verbose() makes it easy to see exactly what POST requests send
POST_verbose <- function(body, ...) {
  POST("https://httpbin.org/post", body = body, verbose(), ...)
  invisible()
}
POST_verbose(list(x = "a", y = "b"))
POST_verbose(list(x = "a", y = "b"), encode = "form")
POST_verbose(FALSE)
POST_verbose(NULL)
POST_verbose("")
POST_verbose("xyz")
## End(Not run)

See Also

with_verbose() makes it easier to use verbose mode even when the requests are buried inside another function call.

Other config: add_headers(), authenticate(), config(), set_cookies(), timeout(), use_proxy(), user_agent()