basicHeaderGatherer {RCurl} | R Documentation

## Functions for processing the response header of a libcurl request

### Description

These two functions are used to collect the contents of the header of an HTTP response via the `headerfunction` option of a curl handle and then processing that text into both the name: value pairs and also the initial line of the response that provides the status of the request. `basicHeaderGatherer` is a simple special case of `basicTextGatherer` with the built-in post-processing step done by `parseHTTPHeader`.

### Usage

    basicHeaderGatherer(txt = character(), max = NA)
    parseHTTPHeader(lines)

### Arguments

`txt` | any initial text that we want included with the header. This is passed to `basicTextGatherer`. Generally it should not be specified unless there is a good reason.
`max` | This is passed directly to `basicTextGatherer`
`lines` | the text as a character vector from the response header that `parseHTTPHeader` will convert to a status and name-value pairs.

### Value

The return value is the same as `basicTextGatherer`, i.e. a list with `update`, `value` and `reset` function elements. The `value` element will invoke `parseHTTPHeader` on the contents read during the processing of the libcurl request and return that value.

### Author(s)

Duncan Temple Lang <duncan@wald.ucdavis.edu>

### References

Curl homepage http://curl.haxx.se

### See Also

`basicTextGatherer` `curlPerform` `curlSetOpt`

### Examples

      h = basicHeaderGatherer()
      getURI("http://www.omegahat.org/RCurl/index.html",
               headerfunction = h$update)
      names(h$value())
      h$value()

[Package RCurl version 0.92-0 Index]