ne_get_response_header, ne_response_header_iterate — functions to access response headers
#include <ne_request.h>
| const char *ne_get_response_header( | ne_request *request, | 
| const char *name ); | 
| void *ne_response_header_iterate( | ne_request *request, | 
| void *cursor, | |
| const char **name, | |
| const char **value ); | 
To retrieve the value of a response header field, the
    ne_get_response_header function can be used,
    and is given the name of the header to return.
To iterate over all the response headers returned, the
    ne_response_header_iterate function can be
    used.  This function takes a cursor
    parameter which should be NULL to retrieve the first header. The
    function stores the name and value of the next header header in
    the name and value
    parameters, and returns a new cursor pointer which can be passed
    to ne_response_header_iterate to retrieve the
    next header.
ne_get_response_header returns a
    string, or NULL if no header with that name was given.  If used
    during request processing, the return value pointer is valid only
    until the next call to ne_begin_request, or
    else, until the request object is destroyed.
Likewise, the cursor, names, and values returned by
    ne_response_header_iterate are only valid
    until the next call to ne_begin_request or
    until the request object is destroyed.
The following code will output the value of the
    Last-Modified header for a resource:
ne_request *req = ne_request_create(sess, "GET", "/foo.txt");
if (ne_request_dispatch(req) == NE_OK) {
    const char *mtime = ne_get_response_header(req, "Last-Modified");
    if (mtime) {
        printf("/foo.txt has last-modified value %s\n", mtime);
    }
}
ne_request_destroy(req);