RCurl (version 1.3-1)

getCurlHandle: Create libcurl handles

Description

These functions create and duplicate curl handles for use in calls to the HTTP facilities provided by that low-level language and this R-level interface. A curl handle is an opaque data type that contains a reference to the internal C-level data structure of libcurl for performing HTTP requests.

The getCurlMutliHandle returns an object that can be used for concurrent, multiple requests. It is quite different from the regular curl handle and again, should be treated as an opaque data type.

Usage

getCurlHandle(..., .opts = NULL, .encoding = integer(), .defaults = getOption("RCurlOptions"))
dupCurlHandle(curl, ..., .opts = NULL, .encoding = integer())
getCurlMultiHandle()

Arguments

curl

the existing curl handle that is to be duplicated

...

a named list of curl options to set after the handle has been created.

.opts

a named list or CURLOptions object identifying the curl options for the handle. These and the ... arguments are used after the handle has been created.

.encoding

an integer or a string that explicitly identifies the encoding of the content that is returned by the HTTP server in its response to our query. The possible strings are UTF-8 or ISO-8859-1 and the integers

.defaults

a collection of default values taken from R's global/session options. This is a parameter so that one can override it if necessary.

Value

• An object of class CURLHandle which is simply a pointer to the memory for the C structure.

Details

These functions create C-level data structures.

References

Curl homepage http://curl.haxx.se

See Also

getURL curlPerform

Examples

options(RCurlOptions = list(verbose = TRUE,
                              followlocation = TRUE,
                              autoreferer = TRUE,
                              nosignal = TRUE))
  x = getURL("http://www.omegahat.org/RCurl")
    # here we override one of these.
  x = getURL("http://www.omegahat.org/RCurl", verbose = FALSE)