491 lines
25 KiB
HTML
491 lines
25 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<title>Copas - Coroutine Oriented Portable Asynchronous Services for Lua</title>
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<link rel="stylesheet" href="doc.css" type="text/css"/>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
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</head>
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<body>
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<div id="container">
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<div id="product">
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<div id="product_logo"><a href="http://www.keplerproject.org">
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<img alt="Copas logo" src="copas.png"/>
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</a></div>
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<div id="product_name"><big><strong>Copas</strong></big></div>
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<div id="product_description">Coroutine Oriented Portable Asynchronous Services for Lua</div>
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</div> <!-- id="product" -->
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<div id="main">
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<div id="navigation">
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<h1>Copas</h1>
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<ul>
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<li><strong>Home</strong>
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<ul>
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<li><a href="index.html#status">Status</a></li>
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<li><a href="index.html#download">Download</a></li>
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<li><a href="index.html#dependencies">Dependencies</a></li>
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<li><a href="index.html#history">History</a></li>
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<li><a href="index.html#credits">Credits</a></li>
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</ul>
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</li>
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<li><a href="manual.html">Manual</a>
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</li>
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<li><a href="reference.html">Reference</a></li>
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<li><a href="http://github.com/lunarmodules/copas/">Project</a>
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<ul>
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<li><a href="http://github.com/lunarmodules/copas/issues">Bug Tracker</a></li>
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</ul>
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</li>
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<li><a href="license.html">License</a></li>
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</ul>
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</div> <!-- id="navigation" -->
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<div id="content">
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<h2><a name="over"></a>Overview</h2>
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<p>
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Copas is a dispatcher based on coroutines that can be used for asynchroneous
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networking. For example TCP or UDP based servers. But it also features timers
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and client support for http(s), ftp and smtp requests.
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</p>
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<p>
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It uses <a href="http://www.cs.princeton.edu/~diego/professional/luasocket/">LuaSocket</a>
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as the interface with the TCP/IP stack and <a href="https://github.com/brunoos/luasec">LuaSec</a> for ssl
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support. For concurrent programming Copas provides timers, locks, semaphores, queues, and futures.
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</p>
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<p>
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A server or thread registered with Copas should provide a handler for requests and use
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Copas socket functions to send the response.
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Copas loops through requests and invokes the corresponding handlers.
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For a full implementation of a Copas HTTP server you can refer to
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<a href="http://keplerproject.github.io/xavante">Xavante</a> as an example.
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</p>
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<p>Copas is free software and uses the same <a href="license.html">license</a>
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as Lua 5.1 to 5.5</p>
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<h2><a name="status"></a>Status</h2>
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<p>Current version is 4.12.0 and was developed for Lua 5.1 to 5.5.</p>
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<h2><a name="download"></a>Download</h2>
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<p>
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Copas can be downloaded from its
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<a href="http://github.com/lunarmodules/copas">Github</a> page, in
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the "Downloads" tab.
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</p>
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<p>You can also install Copas using <a href="http://www.luarocks.org">LuaRocks</a>:</p>
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<pre class="example">
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luarocks install copas
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</pre>
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<h2><a name="dependencies"></a>Dependencies</h2>
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<p>Copas depends on LuaSocket (or LuaSystem), <a href="http://keplerproject.github.io/coxpcall/">Coxpcall</a>
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(only when using Lua 5.1), and (optionally) LuaSec.</p>
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<h2><a name="history"></a>History</h2>
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<dl class="history">
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<dt><strong>Copas 4.12.0</strong> [15/Aug/2026]</dt>
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<dd><ul>
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<li>Fix: a 0-byte <code>receive(0)</code> on a TCP/SSL socket was treated like a normal
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read and queued the caller on <code>select</code>, blocking until more data arrived even
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though nothing was needed. Per POSIX, a 0-byte read on a stream socket is a no-op; it now
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returns <code>""</code> immediately (#223).</li>
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<li>Fix: <code>copas.http</code> included the URL fragment in the request line sent to
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the origin server (and, in proxy mode, to the proxy). Fragments are client-side only and
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must never be transmitted on the wire; a fragment containing sensitive data (e.g. an OAuth
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callback token) was disclosed to the server and to proxy infrastructure/logs (#220).</li>
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<li>Fix: <code>sock:dohandshake()</code> returned <code>nil + err</code> on a handshake
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timeout instead of throwing like every other failure path. A
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timed-out handshake could leave a connection running without the intended TLS
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configuration instead of aborting it; it now throws consistently on a failure (#189).</li>
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<li>Fix: <code>copas.http</code> reused the SNI server name from the first request of a
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redirect chain for every subsequent hop, so a redirect to a different host still sent the
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original host's name in the TLS handshake instead of the new target's. This also applied
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to an explicitly caller-supplied SNI name, which is now cleared on redirect so it no longer
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follows the chain to unrelated hosts.</li>
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<li>Fix: <code>copas.http</code> sent a redirect target's literal IP address as the TLS
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SNI name when no hostname was available. IP literals are not valid SNI names per RFC 6066;
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the SNI extension is now omitted entirely for such requests instead of sending a bogus
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name.</li>
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<li>Fix: a recurring timer that cancelled and immediately re-armed itself from within
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its own callback leaked the old (cancelled) coroutine into the sleeping heap. The old
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coroutine would sit there for its full delay (#213).</li>
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<li>Fix: TLS <code>sslparams</code> tables that didn't contain the current
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<code>wrap</code>/<code>sni</code> keys (e.g. an empty table, or one with misspelled keys)
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were misidentified and silently ended up disabling TLS, producing a plaintext connection
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with no error. Such tables are now passed through to LuaSec, which validates and errors on
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them (#211).</li>
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<li>Fix: a socket read/write/connect timeout left a stale entry in that socket's wait queue.
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If the socket was reused afterwards (e.g. returned to a pool), a later real waiter could
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queue up behind the stale entry and never get woken. Only a single waiter per direction is
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now allowed; a conflicting second waiter gets an immediate "already in progress" error
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instead of being silently abandoned (#209).</li>
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<li>Fix: <code>timer:cancel()</code> could abandon an already in-flight callback instead of
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letting it complete (#207).</li>
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<li>Fix: several accounting bugs in <code>copas.semaphore</code>: <code>take()</code> and
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<code>give()</code> didn't validate their amount, so negative, NaN, or infinite values could
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corrupt or unbound the internal count; <code>destroy()</code> only released up to
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<code>max</code> queued waiters instead of all of them; and <code>get_wait()</code> counted
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waiters that had already been cancelled (#205).</li>
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<li>Added <code>semaphore:release_all()</code> to
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release every waiter past <code>max</code> (#205).</li>
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<li>Fix: <code>copas.future</code> completion was capped at 9999 waiters; the cap has been
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removed (#204).</li>
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<li>Fix: <code>copas.lock:get()</code> with a zero timeout that failed to acquire immediately
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still queued the caller, which then waited forever with nothing left to time it out (#202).</li>
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<li>Fix: <code>copas.lock</code> and <code>copas.semaphore</code> could deadlock or leak
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resources when a queued waiter was cancelled externally (e.g. via
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<code>copas.removethread()</code> or <code>future:cancel()</code>) before being resumed --
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<code>lock:release()</code> could hand ownership to a coroutine that would never run, and
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<code>semaphore:give()</code> could deduct resources for a waiter that would never consume
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them. <code>copas.wakeup()</code> now reports whether it actually woke a coroutine, so callers
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can skip stale entries instead (#200).</li>
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<li>Fix: <code>copas.http</code> silently fell back to plain HTTP when given a URL with an
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unknown/unrecognized scheme, instead of erroring (#195).</li>
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</ul></dd>
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<dt><strong>Copas 4.11.0</strong> [11/Jun/2026]</dt>
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<dd><ul>
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<li>Feat: added <code>copas.cancelall()</code>. It cancels pending work to force-exit the loop.
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Intended use is for testing, to force a loop exit, even if a test fails.</li>
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<li>Fix: when a socket timeout occurs, the registers weren't properly cleaned. This caused
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a memory leak. Fix by @haoxianhan in #186.</li>
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</ul></dd>
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<dt><strong>Copas 4.10.0</strong> [27/Mar/2026]</dt>
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<dd><ul>
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<li>Feat: added <code>copas.future</code> class. Wraps a thread in a future, allowing other
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threads to wait for its result via <code>future:get()</code> or poll with <code>future:try()</code>.
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Errors in the task are propagated to callers. Pending tasks can be cancelled with
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<code>future:cancel()</code>.</li>
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<li>Deps: bump LuaSocket to 3.x release.</li>
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</ul></dd>
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<dt><strong>Copas 4.9.0</strong> [11/Mar/2026]</dt>
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<dd><ul>
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<li>Feat: <code>copas.pause()</code> and <code>copas.pauseforever()</code> now return the
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actual time slept, in case they got woken up early, and to return a truthy success value.</li>
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<li>Fix: the <code>lock</code> and <code>semaphore</code> classes now use the proper coxpcall
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version of <code>coroutine.running</code> in case of Lua 5.1, which could cause rare race-conditions.</li>
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</ul></dd>
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<dt><strong>Copas 4.8.0</strong> [13/Mar/2025]</dt>
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<dd><ul>
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<li>Change: Copas no longer requires LuaSocket, if no sockets are needed, LuaSystem will be enough as a fallback.</li>
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<li>Feat: added <code>copas.gettime()</code>, which transparently maps to either LuaSockets or
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LuaSystems implementation, ensuring independence of the availability of either one of those.</li>
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<li>Feat: Controlled exit of the Copas loop. Adding <code>copas.exit()</code>, <code>copas.exiting()</code>, and
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<code>copas.waitforexit()</code>.</li>
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</ul></dd>
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<dt><strong>Copas 4.7.1</strong> [9/Mar/2024]</dt>
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<dd><ul>
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<li>Fix: <code>copas.removethread</code> would not remove a sleeping thread immediately (it would not execute, but
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would prevent the Copas loop from exiting until the timer expired).</li>
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<li>Fix: <code>queue:finish</code> will return after the last item has been handled, not just popped
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(if using workers).</li>
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</ul></dd>
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<dt><strong>Copas 4.7.0</strong> [15/Jan/2023]</dt>
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<dd><ul>
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<li>Fix: windows makefile didn't include all submodules.</li>
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<li>Fix: creating a new timer with a bad delay setting would throw a bad error message.</li>
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<li>Refactor: submodules are now part of copas (lazily loaded) and do not need to be required anymore</li>
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<li>Feat: runtime script added to directly run copas based code</li>
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<li>Fix: improved socket wrapper for lacking LuaSec methods (<code>setoption, getoption, getpeername, getsockname</code>)</li>
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<li>Feat: added LuaSec methods to wrapper (<code>getalpn, getsniname</code>)</li>
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</ul></dd>
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<dt><strong>Copas 4.6.0</strong> [30/Dec/2022]</dt>
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<dd><ul>
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<li>Added: for timeouts in copas, lock, semaphore, and queue, allow <code>math.huge</code>
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to specify no timeout/wait forever. Using <code>math.huge</code> over long timeouts will
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reduce pressure on the timer-wheel.</li>
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<li>Refactor: increase ringsize (timer-wheel) from 1 minute to 1 day to reduce timer-wheel pressure.</li>
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</ul></dd>
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<dt><strong>Copas 4.5.0</strong> [18/Dec/2022]</dt>
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<dd><ul>
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<li>Added: <code>copas.status</code> got an extra parameter to track more detailed stats.</li>
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<li>Fix: queue workers would not properly handle falsy items in the queue. The worker would
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exit instead of handle the item.</li>
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<li>Fix: a non-reentrant lock should block instead of returning an error when entered again.</li>
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<li>Fix: finishing a queue would not honour the timeout.</li>
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<li>Refactor: more manual cleanup instead of relying on weak-tables.</li>
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</ul></dd>
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<dt><strong>Copas 4.4.0</strong> [23/Oct/2022]</dt>
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<dd><ul>
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<li>Fix: an error in the timer callback would kill the timer.</li>
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<li>Added: <code>copas.geterrorhandler</code> to retrieve the active errorhandler.</li>
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<li>Added: option <code>errorhandler</code> for timer objects.</li>
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<li>Added: <code>copas.pause</code> and <code>copas.pauseforever</code> to replace <code>copas.sleep</code>. The latter
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method can accidentally sleep-forever if time arithmetic returns a negative result.</li>
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<li>Added: <code>copas.status</code> which returns an object with number of tasks/timers/sockets.</li>
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<li>Change: renamed <code>copas.setErrorHandler</code> to <code>copas.seterrorhandler</code>.</li>
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<li>Change: renamed <code>copas.useSocketTimeoutErrors</code> to <code>copas.usesockettimeouterrors</code>.</li>
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</ul></dd>
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<dt><strong>Copas 4.3.2</strong> [03/Oct/2022]</dt>
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<dd><ul>
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<li>Fix: error handler for timeouts. Underlying <a href="https://github.com/keplerproject/coxpcall/issues/18">
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bug is in coxpcall</a>, and hence this only applies to PuC Lua 5.1.</li>
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</ul></dd>
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<dt><strong>Copas 4.3.1</strong> [21/Sep/2022]</dt>
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<dd><ul>
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<li>Fix: with Lua 5.1 the timeouts would resume the wrapped (by coxpcall)
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coroutines, instead of the original ones. Causing errors to bubble up one
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level too many.
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</li>
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</ul></dd>
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<dt><strong>Copas 4.3.0</strong> [19/Sep/2022]</dt>
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<dd><ul>
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<li>Fix: when the loop is idle, do an occasional GC to clean out any lingering
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non-closed sockets. This could prevent the loop from exiting.</li>
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<li>Fix: in debug mode very large data is now truncated when displayed.</li>
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<li>Fix: the receive methods could starve other threads on high-throughput.</li>
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<li>Change: order of <code>copas.addnamedthread</code> args.</li>
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<li>Fix: <code>copas.receivepartial</code> could return early with no data received
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if the `prefix` parameter was specified.</li>
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<li>Change: renamed <code>copas.receivePartial</code> to <code>copas.receivepartial</code>.</li>
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<li>Added: <code>sock:receivepartial</code> to better process streaming TCP data.</li>
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<li>fix: <code>copas.receivepartial</code> is now documented.</li>
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<li>fix: <code>copas.http</code> was missing some error handling.</li>
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<li>fix: Copas timeouts when receiving/sending would not return partial results,
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or last bytes sent.</li>
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</ul></dd>
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<dt><strong>Copas 4.2.0</strong> [06/Sep/2022]</dt>
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<dd><ul>
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<li>Change: pick up datagram size from newer LuaSocket versions.</li>
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<li>Fix: non-recurring timer can now be armed again from its own handler.</li>
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<li>Added: calling on the module table now invokes the <code>copas.loop</code> method.</li>
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</ul></dd>
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<dt><strong>Copas 4.1.0</strong> [25/Aug/2022]</dt>
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<dd><ul>
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<li>Fix: handle errors thrown by the error handlers themselves.</li>
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<li>Deps: Bump timerwheel to 1.0 (no changes, just a small fix)</li>
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<li>Added: <code>copas.gettraceback</code>, previously internal to the default error handler,
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now exposed to make it easier to write proper error handlers</li>
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<li>Added: http-request now takes a timeout setting, previously it would always use the default value
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of 30 seconds.</li>
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<li>Added: the previously internal function for generating a TCP socket in the http-request module,
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is now exported as <code>http.getcreatefunc()</code>. This allows to capture the socket used by the
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request. When using streaming responses, for example with server-sent events, this can be used to modify
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the timeouts, or for closing the stream.</li>
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<li>Fix: empty queues were not destroyed properly and could prevent Copas from exiting</li>
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</ul></dd>
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<dt><strong>Copas 4.0.0</strong> [29/Jul/2022]</dt>
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<dd><ul>
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<li>[breaking] Change: removed the "limitset". Its functionality can easily be recreated with
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the new "queue" class, which is a better abstraction.</li>
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<li>[breaking] Change: threads added through <code>copas.addthread</code> or
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<code>copas.addnamedthread</code> will now be "scheduled", instead of immediately started.</li>
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<li>Fixed: yielding to the Copas scheduler from user-code now throws a proper error and
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no longer breaks the loop. Breaking the loop could also happen if a thread returned with
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at least 2 return values.</li>
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<li>Fixed: wrongly auto-closing sockets. Upon exiting a coroutine, sockets would be automatically
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closed. This should only be the case for accepted TCP connections on a TCP server socket. This caused issues
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for sockets shared between threads.<br />
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[breaking]: this changes behavior, auto-close is now determined when accepting the connection, and no longer when
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terminating the handler thread. This will only affect users that dynamically change <code>copas.autoclose</code>
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at runtime.</li>
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<li>Fixed: http requests would not set SNI defaults. Setting fields <code>protocol</code>,
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<code>options</code>, and <code>verify</code> directly on the http options table is now deprecated. Instead
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specify <code>sslparams</code>, similar to other SSL/TLS functions.</li>
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<li>Added: added <code>sempahore:destroy()</code></li>
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<li>Added: <code>copas.settimeouts</code>, to set separate timeouts for connect, send, receive</li>
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<li>Added: queue class, see module "copas.queue"</li>
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<li>Added: names for sockets and coroutines:
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<ul>
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<li><code>copas.addserver()</code> has a 4th argument; name, to name the server socket</li>
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<li><code>copas.addnamedthread()</code> is new and identical to <code>copas.addthread()</code>,
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but also accepts a name</li>
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<li><code>copas.setsocketname()</code>, <code>copas.getsocketname()</code>,
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<code>copas.setthreadname()</code>, <code>copas.getthreadname()</code> added to manage names</li>
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<li><code>copas.debug.start()</code> and <code>copas.debug.end()</code> to enable debug
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logging for the scheduler itself.</li>
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<li><code>copas.debug.socket()</code> to enable debug logging for socket methods (experimental).</li>
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</ul>
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</li>
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</ul></dd>
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<dt><strong>Copas 3.0.0</strong> [12/Nov/2021]</dt>
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<dd><ul>
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<li>[breaking] Change: <code>copas.addserver()</code> now uses the timeout value as a copas timeout,
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instead of a luasocket timeout. The client sockets for incoming connections will
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inherit the timeout from the server socket.</li>
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<li>Added: support for SNI on TLS connections #81 (@amyspark)</li>
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<li>Added: <code>copas.settimeout()</code> so Copas can manage its own timeouts instead of spinning forever (Patrick Barrett )</li>
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<li>Added: timer class, see module "copas.timer"</li>
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<li>Added: lock class, see module "copas.lock"</li>
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<li>Added: semaphore class, see module "copas.semaphore"</li>
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<li>Added: timeout interface <code>copas.timeout()</code></li>
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<li>Added: option to override the default errorhandler, and fixes to the handler</li>
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<li>Added: <code>copas.removethread()</code> added to be able to forcefully remove a previously added thread</li>
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<li>Added: <code>copas.loop()</code> now takes an optional initialization function</li>
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<li>Fixed: closing sockets from another thread would make the read/write ops hang #104</li>
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<li>Fixed: coxpcall dependency in limit.lua #63 (Francois Perrad)</li>
|
|
<li>Fixed: CI now generates the certificates for testing, on unix make can be used, on Windows generate them manually</li>
|
|
<li>Fixed: type in wrapped <code>udp:setpeername</code> was actually calling <code>udp:getpeername</code></li>
|
|
<li>Fixed: default error handler didn't print the stacktrace</li>
|
|
<li>Fixed: small memory leak when sleeping until woken</li>
|
|
<li>Fixed: do not wrap <code>udp:sendto()</code> method, since udp send doesn't block</li>
|
|
<li>Change: performance improvement in big limit-sets (Francisco Castro)</li>
|
|
<li>Change: update deprecated tls default to tls 1.2 in (copas.http)</li>
|
|
</ul></dd>
|
|
|
|
<dt><strong>Copas 2.0.2</strong> [2017]</dt>
|
|
<dd><ul>
|
|
<li>Added: <code>copas.running</code> flag</li>
|
|
<li>Fixed: fix for http request #53 (Peter Melnichenko)</li>
|
|
<li>Added: extra parameter <code>keep_open</code> for the <code>removeserver()</code> method (Hisham Muhammad)</li>
|
|
<li>Change: tweaked makefile with a <code>DESTDIR</code> variable (Richard Leitner)</li>
|
|
</ul></dd>
|
|
|
|
<dt><strong>Copas 2.0.1</strong> [2016]</dt>
|
|
<dd><ul>
|
|
<li>Added: support for Lua 5.3 (no code changes, just rockspec update)</li>
|
|
<li>Fixed: yield across c boundary error (by Peter Melnichenko)</li>
|
|
<li>Fixed: bug in wrappers for <code>setoption()</code> and <code>shutdown()</code> (reported by Rob Probin)</li>
|
|
</ul></dd>
|
|
|
|
<dt><strong>Copas 2.0.0</strong> [2015]</dt>
|
|
<dd><ul>
|
|
<li>Added: <code>removeserver()</code> function to remove servers from the scheduler (by Paul Kulchenko)</li>
|
|
<li>Added: client requests for http(s), ftp, and smtp (like LuaSocket/LuaSec, but async)</li>
|
|
<li>Added: transparent async support (handshake, and send/receive) for ssl using LuaSec</li>
|
|
<li>Added: <code>handler()</code> as a convenience for full copas and ssl wrapping</li>
|
|
<li>[breaking] Change: the loop now exits when there is nothing more to do</li>
|
|
<li>[breaking] Change: dummy first argument to new tasks removed</li>
|
|
<li>Fixed: completed the socket wrappers, missing functions were added</li>
|
|
<li>Fixed: connect issue, <code>step()</code> errorring out instead of returning <code>nil + error</code></li>
|
|
<li>Fixed: UDP sockets being auto closed</li>
|
|
<li>Fixed: the <code>receivePartial</code> function for http request support (by Paul Kulchenko)</li>
|
|
</ul></dd>
|
|
|
|
<dt><strong>Copas 1.2.1</strong> [2013]</dt>
|
|
<dd><ul>
|
|
<li>Fixed bad version constant</li>
|
|
<li>Fixed timer issue</li>
|
|
<li>updated documentation</li>
|
|
</ul></dd>
|
|
|
|
<dt><strong>Copas 1.2.0</strong> [2013]</dt>
|
|
<dd><ul>
|
|
<li>Support for Lua 5.2</li>
|
|
<li>UDP support</li>
|
|
<li>suspending threads</li>
|
|
<li>other minor updates</li>
|
|
</ul></dd>
|
|
|
|
<dt><strong>Copas 1.1.6</strong> [18/Mar/2010]</dt>
|
|
<dd><ul>
|
|
<li>Now checks to see if socket.http was required before copas
|
|
</li>
|
|
</ul></dd>
|
|
|
|
<dt><strong>Copas 1.1.5</strong> [07/Apr/2009]</dt>
|
|
<dd><ul>
|
|
<li>Fixed bug reported by Sam Roberts on the
|
|
Kepler list
|
|
(found due to Xavante locking up on some POST requests)
|
|
</li>
|
|
</ul></dd>
|
|
|
|
<dt><strong>Copas 1.1.4</strong> [10/Dec/2008]</dt>
|
|
<dd><ul>
|
|
<li>Fixed bug [#5372]
|
|
- copas.connect is semi-broken (found by Gary NG)</li>
|
|
</ul></dd>
|
|
|
|
<dt><strong>Copas 1.1.3</strong> [19/May/2008]</dt>
|
|
<dd><ul>
|
|
<li>Using <code>copcall</code> instead of <code>pcall</code> in <code>socket.protect</code>
|
|
(feature request [#5274] by Gary NG)</li>
|
|
</ul></dd>
|
|
|
|
<dt><strong>Copas 1.1.2</strong> [15/May/2008]</dt>
|
|
<dd><ul>
|
|
<li>Fixed Bug [#4249]
|
|
- bugs in copas.receive (found by Gary NG)</li>
|
|
</ul></dd>
|
|
|
|
<dt><strong>Copas 1.1.1</strong> [13/Aug/2007]</dt>
|
|
<dd>
|
|
<ul>
|
|
<li>Compatible with Lua 5.1</li>
|
|
<li>Refactored by Thomas Harning Jr. (for more details check
|
|
Bug 766)</li>
|
|
<li>Patch by Gary NG concerning the handling of stopped sockets</li>
|
|
</ul>
|
|
|
|
</dd>
|
|
|
|
<dt><strong>Copas 1.1</strong> [20/Sep/2006]</dt>
|
|
<dd><ul>
|
|
<li><a href="reference.html">copas.addthread()</a> added</li>
|
|
</ul></dd>
|
|
|
|
<dt><strong><a href="http://www.keplerproject.org/copas/1.0">Copas 1.0</a></strong> [17/May/2005]</dt>
|
|
<dd><ul>
|
|
<li><a href="reference.html">copas.step()</a> added</li>
|
|
</ul></dd>
|
|
|
|
<dt><strong>Copas 1.0 Beta</strong>[17/Feb/2005]</dt>
|
|
<dd><ul>
|
|
<li>First public version</li>
|
|
</ul></dd>
|
|
</dl>
|
|
|
|
<h2><a name="credits"></a>Credits</h2>
|
|
|
|
<p>Copas was designed and implemented by André Carregal and
|
|
Javier Guerra as part of the
|
|
<a href="http://www.keplerproject.org">Kepler Project</a> which
|
|
holds its copyright. Copas development had significative contributions from Diego Nehab,
|
|
Mike Pall, David Burgess, Leonardo Godinho, Thomas Harning Jr. and Gary NG.</p>
|
|
|
|
|
|
<h2><a name="contact"></a>Contact us</h2>
|
|
|
|
<p>For more information please
|
|
<a href="mailto:info-NO-SPAM-THANKS@keplerproject.org">contact us</a>.
|
|
Comments are welcome!</p>
|
|
|
|
<p>
|
|
You can also reach other Kepler developers and users on the Kepler Project
|
|
<a href="https://groups.google.com/forum/#!forum/kepler-project">mailing list</a>.
|
|
</p>
|
|
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