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| author |   hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 03:10:21 -0500 |
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| committer | hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 03:10:21 -0500 |
| commit | c0b7206652b2852bc574694e7ba07ba1c2acdc00 (patch) | |
| tree | 5cb95cb0e19e03610525903df46279df2c3b7eb1 /rubbos/app/apache2/manual/platform/ebcdic.html.en | |
| parent | b6d3d6e668b793220f2d3af1bc3e828553dc3fe6 (diff) | |
delete app
Change-Id: Id4c572809969ebe89e946e88063eaed262cff3f2
Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
Diffstat (limited to 'rubbos/app/apache2/manual/platform/ebcdic.html.en')
| -rw-r--r-- | rubbos/app/apache2/manual/platform/ebcdic.html.en | 584 |
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diff --git a/rubbos/app/apache2/manual/platform/ebcdic.html.en b/rubbos/app/apache2/manual/platform/ebcdic.html.en deleted file mode 100644 index 9fd5da46..00000000 --- a/rubbos/app/apache2/manual/platform/ebcdic.html.en +++ /dev/null @@ -1,584 +0,0 @@ -<?xml version="1.0" encoding="ISO-8859-1"?> -<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> -<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!-- - XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - This file is generated from xml source: DO NOT EDIT - XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - --> -<title>The Apache EBCDIC Port - Apache HTTP Server</title> -<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> -<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> -<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /> -<link href="../images/favicon.ico" rel="shortcut icon" /></head> -<body id="manual-page"><div id="page-header"> -<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p> -<p class="apache">Apache HTTP Server Version 2.0</p> -<img alt="" src="../images/feather.gif" /></div> -<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> -<div id="path"> -<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.0</a> > <a href="./">Platform Specific Notes</a></div><div id="page-content"><div id="preamble"><h1>The Apache EBCDIC Port</h1> -<div class="toplang"> -<p><span>Available Languages: </span><a href="../en/platform/ebcdic.html" title="English"> en </a> | -<a href="../ko/platform/ebcdic.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p> -</div> - - - <div class="warning"><strong>Warning:</strong> This document - has not been updated to take into account changes made in - the 2.0 version of the Apache HTTP Server. Some of the - information may still be relevant, but please use it with care. - </div> - - </div> -<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#overview">Overview of the Apache EBCDIC Port</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#design">Design Goals</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#technical">Technical Solution</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#porting">Porting Notes</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#document">Document Storage Notes</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#modules">Apache Modules' Status</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#third-party">Third Party Modules' Status</a></li> -</ul></div> -<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="overview" id="overview">Overview of the Apache EBCDIC Port</a></h2> - - - - <p>Version 1.3 of the Apache HTTP Server is the first version - which includes a port to a (non-ASCII) mainframe machine which - uses the EBCDIC character set as its native codeset.</p> - - <p>(It is the SIEMENS family of mainframes running the <a href="http://www.siemens.de/servers/bs2osd/osdbc_us.htm">BS2000/OSD - operating system</a>. This mainframe OS nowadays features a - SVR4-derived POSIX subsystem).</p> - - <p>The port was started initially to</p> - - <ul> - <li>prove the feasibility of porting <a href="http://dev.apache.org/">the Apache HTTP server</a> to - this platform</li> - - <li>find a "worthy and capable" successor for the venerable - <a href="http://www.w3.org/Daemon/">CERN-3.0</a> daemon - (which was ported a couple of years ago), and to</li> - - <li>prove that Apache's preforking process model can on this - platform easily outperform the accept-fork-serve model used - by CERN by a factor of 5 or more.</li> - </ul> - - <p>This document serves as a rationale to describe some of the - design decisions of the port to this machine.</p> - - </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="design" id="design">Design Goals</a></h2> - - - - <p>One objective of the EBCDIC port was to maintain enough - backwards compatibility with the (EBCDIC) CERN server to make - the transition to the new server attractive and easy. This - required the addition of a configurable method to define - whether a HTML document was stored in ASCII (the only format - accepted by the old server) or in EBCDIC (the native document - format in the POSIX subsystem, and therefore the only realistic - format in which the other POSIX tools like <code>grep</code> or - <code>sed</code> could operate on the documents). The current - solution to this is a "pseudo-MIME-format" which is intercepted - and interpreted by the Apache server (see below). Future versions - might solve the problem by defining an "ebcdic-handler" for all - documents which must be converted.</p> - - </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="technical" id="technical">Technical Solution</a></h2> - - - - <p>Since all Apache input and output is based upon the BUFF - data type and its methods, the easiest solution was to add the - conversion to the BUFF handling routines. The conversion must - be settable at any time, so a BUFF flag was added which defines - whether a BUFF object has currently enabled conversion or not. - This flag is modified at several points in the HTTP - protocol:</p> - - <ul> - <li><strong>set</strong> before a request is received - (because the request and the request header lines are always - in ASCII format)</li> - - <li><strong>set/unset</strong> when the request body is - received - depending on the content type of the request body - (because the request body may contain ASCII text or a binary - file)</li> - - <li><strong>set</strong> before a reply header is sent - (because the response header lines are always in ASCII - format)</li> - - <li><strong>set/unset</strong> when the response body is sent - - depending on the content type of the response body (because - the response body may contain text or a binary file)</li> - </ul> - - </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="porting" id="porting">Porting Notes</a></h2> - - - - <ol> - <li> - <p>The relevant changes in the source are <code>#ifdef</code>'ed - into two categories:</p> - - <dl> - <dt><code><strong>#ifdef - CHARSET_EBCDIC</strong></code></dt> - - <dd> - <p>Code which is needed for any EBCDIC based machine. - This includes character translations, differences in - contiguity of the two character sets, flags which - indicate which part of the HTTP protocol has to be - converted and which part doesn't <em>etc.</em></p> - </dd> - - <dt><code><strong>#ifdef _OSD_POSIX</strong></code></dt> - - <dd> - <p>Code which is needed for the SIEMENS BS2000/OSD - mainframe platform only. This deals with include file - differences and socket implementation topics which are - only required on the BS2000/OSD platform.</p> - </dd> - </dl> - </li> - - <li> - <p>The possibility to translate between ASCII and EBCDIC at - the socket level (on BS2000 POSIX, there is a socket option - which supports this) was intentionally <em>not</em> chosen, - because the byte stream at the HTTP protocol level consists - of a mixture of protocol related strings and non-protocol - related raw file data. HTTP protocol strings are always - encoded in ASCII (the <code>GET</code> request, any Header: lines, - the chunking information <em>etc.</em>) whereas the file transfer - parts (<em>i.e.</em>, GIF images, CGI output <em>etc.</em>) - should usually be just "passed through" by the server. This - separation between "protocol string" and "raw data" is - reflected in the server code by functions like <code>bgets()</code> - or <code>rvputs()</code> for strings, and functions like - <code>bwrite()</code> for binary data. A global translation - of everything would therefore be inadequate.</p> - - <p>(In the case of text files of course, provisions must be - made so that EBCDIC documents are always served in - ASCII)</p> - </li> - - <li> - <p>This port therefore features a built-in protocol level - conversion for the server-internal strings (which the - compiler translated to EBCDIC strings) and thus for all - server-generated documents. The hard coded ASCII escapes - <code>\012</code> and <code>\015</code> which are ubiquitous - in the server code are an exception: they are already the binary - encoding of the ASCII <code>\n</code> and <code>\r</code> and - must not be converted to ASCII a second time. - This exception is only relevant for server-generated strings; - and <em>external</em> EBCDIC documents are not expected to - contain ASCII newline characters.</p> - </li> - - <li> - <p>By examining the call hierarchy for the BUFF management - routines, I added an "ebcdic/ascii conversion layer" which - would be crossed on every puts/write/get/gets, and a - conversion flag which allowed enabling/disabling the - conversions on-the-fly. Usually, a document crosses this - layer twice from its origin source (a file or CGI output) to - its destination (the requesting client): <code>file -> - Apache</code>, and <code>Apache -> client</code>.</p> - - <p>The server can now read the header lines of a CGI-script - output in EBCDIC format, and then find out that the remainder - of the script's output is in ASCII (like in the case of the - output of a WWW Counter program: the document body contains a - GIF image). All header processing is done in the native - EBCDIC format; the server then determines, based on the type - of document being served, whether the document body (except - for the chunking information, of course) is in ASCII already - or must be converted from EBCDIC.</p> - </li> - - <li> - <p>For Text documents (MIME types text/plain, text/html - <em>etc.</em>), an implicit translation to ASCII can be - used, or (if the users prefer to store some documents in - raw ASCII form for faster serving, or because the files - reside on a NFS-mounted directory tree) can be served - without conversion.</p> - - <p><strong>Example:</strong></p> - - <p>to serve files with the suffix <code>.ahtml</code> as a - raw ASCII <code>text/html</code> document without implicit - conversion (and suffix <code>.ascii</code> as ASCII - <code>text/plain</code>), use the directives:</p> - - <div class="example"><p><code> - AddType text/x-ascii-html .ahtml <br /> - AddType text/x-ascii-plain .ascii - </code></p></div> - - <p>Similarly, any <code>text/foo</code> MIME type can be - served as "raw ASCII" by configuring a MIME type - "<code>text/x-ascii-foo</code>" for it using - <code>AddType</code>.</p> - </li> - - <li> - <p>Non-text documents are always served "binary" without - conversion. This seems to be the most sensible choice for, - .<em>e.g.</em>, GIF/ZIP/AU file types. This of course - requires the user to copy them to the mainframe host using - the "<code>rcp -b</code>" binary switch.</p> - </li> - - <li> - <p>Server parsed files are always assumed to be in native - (<em>i.e.</em>, EBCDIC) format as used on the machine, and - are converted after processing.</p> - </li> - - <li> - <p>For CGI output, the CGI script determines whether a - conversion is needed or not: by setting the appropriate - Content-Type, text files can be converted, or GIF output can - be passed through unmodified. An example for the latter case - is the wwwcount program which we ported as well.</p> - </li> - - </ol> - - </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="document" id="document">Document Storage Notes</a></h2> - - - - <h3><a name="binary" id="binary">Binary Files</a></h3> - - - - <p>All files with a <code>Content-Type:</code> which does not - start with <code>text/</code> are regarded as <em>binary - files</em> by the server and are not subject to any conversion. - Examples for binary files are GIF images, gzip-compressed files - and the like.</p> - - <p>When exchanging binary files between the mainframe host and - a Unix machine or Windows PC, be sure to use the ftp "binary" - (<code>TYPE I</code>) command, or use the - <code>rcp -b</code> command from the mainframe host (the - <code>-b</code> switch is not supported in unix - <code>rcp</code>'s).</p> - - - - <h3><a name="text" id="text">Text Documents</a></h3> - - - - <p>The default assumption of the server is that Text Files - (<em>i.e.</em>, all files whose <code>Content-Type:</code> - starts with <code>text/</code>) are stored in the native - character set of the host, EBCDIC.</p> - - - - <h3><a name="ssi" id="ssi">Server Side Included Documents</a></h3> - - - - <p>SSI documents must currently be stored in EBCDIC only. - No provision is made to convert it from ASCII before - processing.</p> - - - - </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="modules" id="modules">Apache Modules' Status</a></h2> - - - - <table class="bordered"> - <tr> - <th>Module</th> - <th>Status</th> - <th>Notes</th> - </tr> - - <tr> - <td><code class="module"><a href="../mod/core.html">core</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_access.html">mod_access</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_actions.html">mod_actions</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_alias.html">mod_alias</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_asis.html">mod_asis</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_auth.html">mod_auth</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_auth_anon.html">mod_auth_anon</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_auth_dbm.html">mod_auth_dbm</a></code></td> - <td class="centered">?</td> - <td>with own <code>libdb.a</code></td> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_autoindex.html">mod_autoindex</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_cern_meta.html">mod_cern_meta</a></code></td> - <td class="centered">?</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code>mod_digest</code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_dir.html">mod_dir</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_so.html">mod_so</a></code></td> - <td class="centered">-</td> - <td>no shared libs</td> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_env.html">mod_env</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_example.html">mod_example</a></code></td> - <td class="centered">-</td> - <td>(test bed only)</td> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_expires.html">mod_expires</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_headers.html">mod_headers</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_imap.html">mod_imap</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_include.html">mod_include</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_info.html">mod_info</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code>mod_log_agent</code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_log_config.html">mod_log_config</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code>mod_log_referer</code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_mime.html">mod_mime</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_mime_magic.html">mod_mime_magic</a></code></td> - <td class="centered">?</td> - <td>not ported yet</td> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_negotiation.html">mod_negotiation</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code></td> - <td class="centered">+</td> - <td>untested</td> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_setenvif.html">mod_setenvif</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_speling.html">mod_speling</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_status.html">mod_status</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_unique_id.html">mod_unique_id</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_userdir.html">mod_userdir</a></code></td> - <td class="centered">+</td> - <td /> - </tr> - - <tr> - <td><code class="module"><a href="../mod/mod_usertrack.html">mod_usertrack</a></code></td> - <td class="centered">?</td> - <td>untested</td> - </tr> - </table> - - </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="third-party" id="third-party">Third Party Modules' Status</a></h2> - - - - <table class="bordered"> - <tr> - <th>Module</th> - <th>Status</th> - <th>Notes</th> - </tr> - - <tr> - <td><code><a href="http://java.apache.org/">mod_jserv</a> - </code></td> - <td class="centered">-</td> - <td>JAVA still being ported.</td> - </tr> - - <tr> - <td><code><a href="http://www.php.net/">mod_php3</a></code></td> - <td class="centered">+</td> - <td><code>mod_php3</code> runs fine, with LDAP and GD - and FreeType libraries.</td> - </tr> - - <tr> - <td><code><a href="http://hpwww.ec-lyon.fr/~vincent/apache/mod_put.html">mod_put</a></code></td> - <td class="centered">?</td> - <td>untested</td> - </tr> - - <tr> - <td><code><a href="ftp://hachiman.vidya.com/pub/apache/">mod_session</a></code></td> - <td class="centered">-</td> - <td>untested</td> - </tr> - </table> - - </div></div> -<div class="bottomlang"> -<p><span>Available Languages: </span><a href="../en/platform/ebcdic.html" title="English"> en </a> | -<a href="../ko/platform/ebcdic.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p> -</div><div id="footer"> -<p class="apache">Copyright 2009 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p> -<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div> -</body></html>
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