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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/1952/">https://reviewboard.asterisk.org/r/1952/</a>
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<p style="margin-top: 0;">On May 30th, 2012, 11:35 a.m., <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1952/diff/1/?file=28385#file28385line117" style="color: black; font-weight: bold; text-decoration: underline;">/res/res_http_websocket.c</a>
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(Diff revision 1)
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_websocket_add_protocol(const char *name, ast_websocket_callback callback)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> struct websocket_protocol tmp = { .name = (char*)name, }, *protocol;</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> ao2_lock(protocols);</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> /* Ensure a second protocol handler is not registered for the same protocol */</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> if ((protocol = ao2_find(protocols, &tmp, OBJ_POINTER))) {</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> ao2_ref(protocol, -1);</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> ao2_unlock(protocols);</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> return -1;</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> }</pre></td>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This certainly isn't something you have to do, but there is an OBJ_KEY attribute you can pass to ao2_find() that allows you to just pass the name of the protocol in instead of having to create a temporary websocket_protocol on the stack. You would have to adjust the hash and comparison functions to accommodate the use of OBJ_KEY if you went this route.</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Changed.</pre>
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<p style="margin-top: 0;">On May 30th, 2012, 11:35 a.m., <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1952/diff/1/?file=28385#file28385line119" style="color: black; font-weight: bold; text-decoration: underline;">/res/res_http_websocket.c</a>
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(Diff revision 1)
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_websocket_add_protocol(const char *name, ast_websocket_callback callback)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> ao2_lock(protocols);</pre></td>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This locking seems unnecessary. ao2_find will lock the container while trying to find the desired protocol, and ao2_link() will lock the container while the protocol is added to the container.
If this locking is required for some other reason, then pass the OBJ_NOLOCK flags to ao2_find and ao2_link.</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">It ensures that between the time of trying to find out if the sub-protocol is already registered and registering it that no other module registers the same sub-protocol. Will it ever happen? Doubtful but better to be safe than sorry.</pre>
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<p style="margin-top: 0;">On May 30th, 2012, 11:35 a.m., <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1952/diff/1/?file=28385#file28385line150" style="color: black; font-weight: bold; text-decoration: underline;">/res/res_http_websocket.c</a>
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(Diff revision 1)
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_websocket_add_protocol(const char *name, ast_websocket_callback callback)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_websocket_remove_protocol(const char *name, ast_websocket_callback callback)</pre></td>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I don't understand the inclusion of "callback" as a parameter to this function. Does this mean that it's acceptable to have multiple protocols with the same name but different callbacks registered? If that's the case, then the comparison callback for the container needs to always take into consideration the callback parameter.</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">It's a sanity check essentially to ensure other modules don't try to register your sub-protocol.</pre>
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<p style="margin-top: 0;">On May 30th, 2012, 11:35 a.m., <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1952/diff/1/?file=28385#file28385line227" style="color: black; font-weight: bold; text-decoration: underline;">/res/res_http_websocket.c</a>
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_websocket_add_protocol(const char *name, ast_websocket_callback callback)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> if (bytes > MAXIMUM_RECONSTRUCTION_CEILING) {</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> bytes = MAXIMUM_RECONSTRUCTION_CEILING;</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> }</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> session->reconstruct = bytes;</pre></td>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">session->reconstruct = MIN(bytes, MAXIMUM_RECONSTRUCTION_CEILING);</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Fixed.</pre>
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<p>- Joshua</p>
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<p>On May 29th, 2012, 1:25 p.m., Joshua Colp wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Joshua Colp.</div>
<p style="color: grey;"><i>Updated May 29, 2012, 1:25 p.m.</i></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This adds support for WebSocket protocols 7, 8, and 13. These are the most recent protocols. Sending and receiving text/binary frames is supported along with the various operation codes. An API is provided which makes it easy to implement different sub-protocols. Frame reconstruction is supported for situations where desirable (if multiple frames are received they will be reconstructed into a single one) but this can be disabled in situations where streaming is wanted.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Tested using Google Chrome Canary to confirm connection is established and data can be sent and received.
Tested using websocket.py to confirm connection is established and data can be sent and received.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/trunk/include/asterisk/http_websocket.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/include/asterisk/utils.h <span style="color: grey">(360141)</span></li>
<li>/trunk/main/utils.c <span style="color: grey">(360141)</span></li>
<li>/trunk/res/res_http_websocket.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/res/res_http_websocket.exports.in <span style="color: grey">(PRE-CREATION)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/1952/diff/" style="margin-left: 3em;">View Diff</a></p>
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