Annotation of libwww/Library/src/HTInit.html, revision 2.49
2.6 timbl 1: <HTML>
2: <HEAD>
2.48 frystyk 3: <!-- Changed by: Henrik Frystyk Nielsen, 13-Jul-1996 -->
2.49 ! frystyk 4: <TITLE>W3C Sample Code Library libwww Default Initialization</TITLE>
2.6 timbl 5: </HEAD>
6: <BODY>
2.36 frystyk 7: <H1>
8: Default Initialization Methods
9: </H1>
2.11 frystyk 10: <PRE>
11: /*
2.16 frystyk 12: ** (c) COPYRIGHT MIT 1995.
2.11 frystyk 13: ** Please first read the full copyright statement in the file COPYRIGH.
14: */
15: </PRE>
2.36 frystyk 16: <P>
17: As mentioned in the <A HREF="../User/Architecture/">Library Architecture</A>,
18: libwww consists of a small core and a large set of hooks for adding
19: functionality. By itself, the core it not capable of performing any Web related
20: tasks like accessing a HTTP server or parsing a HTML document. All this
21: functionality must be registered by the application. This way, the core of
22: libwww is kept application independent and can be used as the basic building
23: block for any kind of Web application. The Library comes with a large set
24: of default functions, for example for accessing HTTP and FTP servers, parsing
25: <A HREF="http://info.internet.isi.edu:80/in-notes/rfc/files/rfc822.txt">RFC
26: 822</A> headers etc. This module helps the application programmer setting
27: up all this functionality, but it is important to note that none of it is
28: <I>required</I> in order to use the Library.
29: <P>
30: This module is implemented by <A HREF="HTInit.c">HTInit.c</A>, and it is
2.49 ! frystyk 31: a part of the <A HREF="http://www.w3.org/pub/WWW/Library/">W3C Sample Code
2.36 frystyk 32: Library</A>. You can also have a look at the other
33: <A HREF="WWWInit.html">Initialization modules</A>.
2.9 frystyk 34: <PRE>
2.13 frystyk 35: #ifndef HTINIT_H
36: #define HTINIT_H
2.27 frystyk 37: #include "WWWLib.h"
2.37 eric 38: #include "WWWApp.h"
2.9 frystyk 39: </PRE>
2.36 frystyk 40: <H2>
41: Default Transport Protocol Modules
42: </H2>
43: <P>
2.32 frystyk 44: Register the default set of transport protocols.
45: <PRE>
2.36 frystyk 46: #include "WWWTrans.h"
2.32 frystyk 47:
48: extern void HTTransportInit (void);
49: </PRE>
2.36 frystyk 50: <H2>
51: Default Protocol Modules
52: </H2>
53: <P>
54: Set up default bindings between access schemes and the set of protocol modules
2.48 frystyk 55: in the Library. The preemptive version registers all protocol modules to
56: use blocking sockets.
2.32 frystyk 57: <PRE>
58: #include "WWWHTTP.h"
59: #include "WWWFile.h"
60: #include "WWWFTP.h"
61: #include "WWWGophe.h"
62: #include "WWWTelnt.h"
63: #include "WWWNews.h"
64:
65: #ifdef HT_DIRECT_WAIS
66: #include "WWWWAIS.h"
67: #endif
68:
2.47 frystyk 69: #ifndef FTP_PORT
70: #define FTP_PORT 21
71: #endif
72: #ifndef NEWS_PORT
73: #define NEWS_PORT 119
74: #endif
75: #ifndef GOPHER_PORT
76: #define GOPHER_PORT 70
77: #endif
78: #ifndef WAIS_PORT
79: #define WAIS_PORT 666
80: #endif
81: #ifndef HTTP_PORT
82: #define HTTP_PORT 80
83: #endif
84:
2.41 frystyk 85: #define HTAccessInit HTProtocolInit
2.43 frystyk 86:
2.40 frystyk 87: extern void HTProtocolInit (void);
2.43 frystyk 88:
89: extern void HTProtocolPreemptiveInit (void);
2.32 frystyk 90: </PRE>
2.36 frystyk 91: <H2>
2.40 frystyk 92: <A NAME="MIME">Default MIME Parsers</A>
2.37 eric 93: </H2>
94: <P>
2.38 frystyk 95: The core doesn't have any built in MIME parsers, but many of the protocols
2.39 frystyk 96: need them. For instance, many elements of the library rely on the
2.42 frystyk 97: <CODE>Content-Length</CODE> being correctly set. <CODE>HTMIMEInit()</CODE>
98: provides the minimal functionality needed for library reliabilty.
2.40 frystyk 99: <PRE>
100: #include "WWWMIME.h"
101: #include "WWWApp.h"
102:
103: extern void HTMIMEInit (void);
2.37 eric 104: </PRE>
105: <H2>
2.36 frystyk 106: Default Event Manager
107: </H2>
108: <P>
2.39 frystyk 109: libwww core does not have any default event loop - it has to be added by
110: the application. However, it does come with an example implementation thta
111: may be used. This implementation is based on a <CODE>select</CODE> system
112: call using non-blocking and interleaved sockets.
2.35 frystyk 113: <PRE>
2.39 frystyk 114: #include "WWWApp.h"
2.35 frystyk 115: </PRE>
2.36 frystyk 116: <H2>
2.40 frystyk 117: <A NAME="Converter">Default Media Type Conversions</A>
2.36 frystyk 118: </H2>
119: <P>
120: The <EM>Converters</EM> are used to convert a media type to another media
121: type, or to present it on screen. This is a part of the stream stack algorithm.
122: The Presenters are also used in the stream stack, but are initialized separately.
2.38 frystyk 123: <PRE>#include "WWWMIME.h"
2.32 frystyk 124: #include "WWWHTML.h"
125: #include "WWWStream.h"
126: #include "WWWDir.h"
2.46 frystyk 127: #include "WWWCache.h"
2.23 frystyk 128:
2.21 frystyk 129: extern void HTConverterInit (HTList * conversions);
2.14 frystyk 130: </PRE>
2.36 frystyk 131: <H3>
132: Presenters
133: </H3>
134: <P>
135: The <EM>Presenters</EM> are used to present a media type to the use by calling
136: an external program, for example a post script viewer. This is a part of
137: the stream stack algorithm. The <I>Converters</I> are also used in the stream
138: stack, but are initialized separately. The <I>Presenters</I> use the same
139: include files as the <I>Converters</I>.
2.14 frystyk 140: <PRE>
2.21 frystyk 141: extern void HTPresenterInit (HTList * conversions);
2.14 frystyk 142: </PRE>
2.36 frystyk 143: <H3>
144: Converters and Presenters
145: </H3>
146: <P>
147: This function is only defined in order to preserve backward compatibility.
2.21 frystyk 148: <PRE>
149: extern void HTFormatInit (HTList * conversions);
2.9 frystyk 150: </PRE>
2.36 frystyk 151: <H2>
2.48 frystyk 152: Default Transfer Encodings
2.36 frystyk 153: </H2>
154: <P>
2.48 frystyk 155: Transfer encoders and decoders can handle encodings like <EM>chunked</EM>
2.36 frystyk 156: etc.
2.42 frystyk 157: <PRE>#include "<A HREF="WWWHTTP.html">WWWHTTP.h</A>"
2.9 frystyk 158:
2.48 frystyk 159: extern void HTTransferEncoderInit (HTList * encodings);
2.33 frystyk 160: </PRE>
2.36 frystyk 161: <H2>
2.48 frystyk 162: Default Content Encodings
163: </H2>
164: <P>
165: Content encoders and decoders can handle encodings like <EM>deflate</EM>
166: etc.
167: <PRE>#include "<A HREF="WWWZip.html">WWWZip.h</A>"
168:
169: extern void HTContentEncoderInit (HTList * encodings);
170: </PRE>
171: <H2>
2.42 frystyk 172: Default BEFORE and AFTER Filters
2.36 frystyk 173: </H2>
174: <P>
2.42 frystyk 175: This module provides a set of default <B>BEFORE</B> and <B>AFTER</B> filters
176: that can be registered by the <A HREF="HTNet.html">Net manager</A> to be
177: called before and after a request. All filters can be registered either to
178: be called <I>globally</I> (all requests) or <I>locally</I> (pr request basis).
179: <B>Not</B> done automaticly - may be done by application!
180: <H3>
181: BEFORE Filters
182: </H3>
183: <P>
184: The <I>BEFORE</I> filters handle <I>proxies</I>, <I>caches</I>, <I>rule
185: files</I> etc. The filters are called in the order by which the are registered
186: <PRE>#include "<A HREF="WWWApp.html">WWWApp.h</A>"
2.33 frystyk 187:
2.42 frystyk 188: extern void HTBeforeInit (void);
189: </PRE>
190: <H3>
191: AFTER Filters
192: </H3>
193: <P>
194: The <I>AFTER</I> filters handle error messages, logging, redirection,
195: authentication etc. The filters are called in the order by which the are
196: registered
197: <PRE>extern void HTAfterInit (void);
198: </PRE>
199: <H3>
200: BEFORE and AFTER Filters
201: </H3>
202: <P>
203: This is just a short cut for registrating both <I>BEFORE</I> and <I>AFTER</I>
204: at once
205: <PRE>extern void HTNetInit (void);
206: </PRE>
207: <H2>
208: Default Access Authentication Modules
209: </H2>
210: <P>
211: The <A HREF="HTAAUtil.html">Access Manager</A> which is implemented as a
212: <I>BEFORE</I> and an <I>AFTER</I> filter (automatically registered in
213: <CODE>HTNetInit()</CODE>) does not by default know of any access authentication
214: schemes. As everything else, this must be registered! This function does
215: the job and should be all you need.
216: <PRE>extern void HTAAInit (void);
2.27 frystyk 217: </PRE>
2.36 frystyk 218: <H2>
219: Default Message and Dialog Functions
220: </H2>
221: <P>
222: We register a set of alert messages Not done automaticly - may be done by
223: application!
2.42 frystyk 224: <PRE>#include "<A HREF="HTApp.html">WWWApp.h</A>"
2.27 frystyk 225:
226: extern void HTAlertInit (void);
227: </PRE>
2.40 frystyk 228: <H2>
229: Default Icons for Directory Listings
230: </H2>
231: <P>
2.42 frystyk 232: The <A HREF="WWWDir.html">WWWDir interface</A> contains support for including
233: references (URLs and <CODE>ALT</CODE> text tags) to icons in directory listings.
234: The icons are selected as a function of the media type and the content encoding
235: of the file in question. That is - you can set up icons for compressed files,
236: postscript files etc. There is also a small set of specific icons representing
237: directories etc.
2.40 frystyk 238: <PRE>#include "<A HREF="WWWFile.html">WWWFile.h</A>"
239:
240: extern void HTIconInit (const char * url_prefix);
241: </PRE>
2.27 frystyk 242: <PRE>
2.13 frystyk 243: #endif
2.9 frystyk 244: </PRE>
2.36 frystyk 245: <P>
246: <HR>
2.31 frystyk 247: <ADDRESS>
2.49 ! frystyk 248: @(#) $Id: HTInit.html,v 2.48 1997/01/26 08:13:48 frystyk Exp $
2.31 frystyk 249: </ADDRESS>
2.36 frystyk 250: </BODY></HTML>
Webmaster
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to HTInit.html CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Public] / libwww / Library / src