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- <html><head><title>ArcWeb and the Internet</title>
- </head><body><h1><img src="#!arcweb">ArcWeb & the Internet</h1>
-
- ArcWeb handles the fetching via a
- variety of different methods. Since ArcWeb uses only the socket level
- interface provided by Acorn TCP/IP, it will also run over anything else
- which provides an identical SWI interface (chunk &41200).
-
- ArcWeb supports<ul>
- <li>HTTP (HyperText Transfer Protocol)
- <li>FTP (File Transfer Protocol)
- <li>SMTP (Simple Mail Transfer Protocol
- <li>NNTP (Network News Transfer Protocol)
- <li>Finger
- <li>Telnet
- <li>Gopher
- <li>WAIS
- </ul>although WAIS
- is achieved through the use of proxy
- services such as those available at wwwcache.hensa.ac.uk. ArcWeb talks
- HTTP to proxy servers which perform the interaction with the remote site and
- send back the result via the HTTP protocol. Non-documents (eg. WAIS
- menus) are returned as HTML documents generated by the proxy server. Proxy
- servers are useful things to run on firewall machines as it allows people
- inside the firewall to access the Web services.<p>
- Other facilities supported by <strong>ArcWeb</strong> include<ul>
-
- <li>Transparent handling of <em>Location</em> indicating that a document has
- moved. The redirection is detected whilst the original response is being
- read and the query replaced by a request for the new URL. Note that if a
- failure occurs whilst fetching the replacement URL, any errors reported will
- be reported as having come from the original document requested and not the
- resultant of the search. There is no limit to the number of
- <em>Location</em> directives that may be chained together, ArcWeb will
- continue following the trail until the answer is found
-
- </ul>
-
-
- <h3>Testing your Configuration</h3>
-
- You can test the configuration of the nameservers by using the dialogue
- boxes accessed via the <img src="#!arcweb" alt="ArcWeb icon bar icon">
- menu. You can look up hosts by name or by IP address. Enter the query
- in the writable icon and choose the lookup type in the radio icons, and
- then press RETURN or click on the Run Query button. The answers will
- be looked up and entered into the display icon below, with a menu to
- see all the answers.
-
- <hr> </body><address><a
- href="http://www.dsse.ecs.soton.ac.uk/">S.N.Brodie</a><br> Department of
- Electronics & Computer Science<br> University of
- Southampton</address></html>
-