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448
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1 /*
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2 * Copyright (c) 2000, Red Hat, Inc.
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; either version 2 of the License, or
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7 * (at your option) any later version.
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8 *
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9 * A copy of the GNU General Public License can be found at
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10 * http://www.gnu.org/
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11 *
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12 * Written by DJ Delorie <dj@cygnus.com>
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13 *
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14 */
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15
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16 /* This is the parent class for all the access methods known to setup
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17 (i.e. ways to download files from the internet or other sources */
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18
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19 class NetIO {
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20 protected:
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21 NetIO (char *url);
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22 void set_url (char *url);
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23
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24 public:
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25 /* if nonzero, this is the estimated total file size */
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26 int file_size;
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27 /* broken down url FYI */
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28 char *url;
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29 char *proto;
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30 char *host;
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31 int port;
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32 char *path;
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33 virtual ~NetIO ();
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34
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35 /* The user calls this function to create a suitable accessor for
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36 the given URL. It uses the network setup state in state.h. If
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37 anything fails, either the return values is NULL or the returned
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38 object is !ok() */
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39 static NetIO * open (char *url);
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40
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41 /* If !ok() that means the transfer isn't happening. */
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42 virtual int ok ();
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43
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44 /* Read `nbytes' bytes from the file. Returns zero when the file
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45 is complete. */
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46 virtual int read (char *buf, int nbytes);
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47
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48 /* Helper functions for http/ftp protocols. Both return nonzero for
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49 "cancel", zero for "ok". They set net_proxy_user, etc, in
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50 state.h */
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51 int get_auth ();
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52 int get_proxy_auth ();
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53 };
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