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diff --git a/_build/static/archives/extend/2014-September/000466.html b/_build/static/archives/extend/2014-September/000466.html new file mode 100644 index 00000000..94dd1886 --- /dev/null +++ b/_build/static/archives/extend/2014-September/000466.html @@ -0,0 +1,161 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<HTML> + <HEAD> + <TITLE> [99s-extend] Newbie, Cowboy + Websocket + Audio Recording + </TITLE> + <LINK REL="Index" HREF="index.html" > + <LINK REL="made" HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20Newbie%2C%20Cowboy%20%2B%20Websocket%20%2B%20Audio%20Recording&In-Reply-To=%3CCAKAMJXghRnTZ1CTPkTBapOgh7BnFLUnvL%2B%2BVVedyXuAzWT6HSQ%40mail.gmail.com%3E"> + <META NAME="robots" CONTENT="index,nofollow"> + <style type="text/css"> + pre { + white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ + } + </style> + <META http-equiv="Content-Type" content="text/html; charset=us-ascii"> + <LINK REL="Previous" HREF="000465.html"> + <LINK REL="Next" HREF="000467.html"> + </HEAD> + <BODY BGCOLOR="#ffffff"> + <H1>[99s-extend] Newbie, Cowboy + Websocket + Audio Recording</H1> + <B>Eduardo Gurgel</B> + <A HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20Newbie%2C%20Cowboy%20%2B%20Websocket%20%2B%20Audio%20Recording&In-Reply-To=%3CCAKAMJXghRnTZ1CTPkTBapOgh7BnFLUnvL%2B%2BVVedyXuAzWT6HSQ%40mail.gmail.com%3E" + TITLE="[99s-extend] Newbie, Cowboy + Websocket + Audio Recording">edgurgel at gmail.com + </A><BR> + <I>Tue Sep 30 00:53:26 CEST 2014</I> + <P><UL> + <LI>Previous message: <A HREF="000465.html">[99s-extend] Newbie, Cowboy + Websocket + Audio Recording +</A></li> + <LI>Next message: <A HREF="000467.html">[99s-extend] Newbie, Cowboy + Websocket + Audio Recording +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#466">[ date ]</a> + <a href="thread.html#466">[ thread ]</a> + <a href="subject.html#466">[ subject ]</a> + <a href="author.html#466">[ author ]</a> + </LI> + </UL> + <HR> +<!--beginarticle--> +<PRE>Looking on the output it says: + +*{reason,badarith} *on this line: + +RecorderPid ! {rec, _Frame/binary}, + +This may help you somehow. + +BTW, variables starting with _ are usually used to show unused variables +and stop warnings from the compiler. + +On 30 September 2014 05:52, Juan Matías <<A HREF="https://lists.ninenines.eu/listinfo/extend">jmrepetti at gmail.com</A>> wrote: + +><i> Hello list, I hope this is the right place to ask this. +</I>><i> +</I>><i> I'm learning Erlang, and I wanted to create a Cowboy app to record audio +</I>><i> from a web browser. +</I>><i> +</I>><i> Based on the websocket example in the Cowboy source code, I get the user +</I>><i> mic input and send this input to the websocket. +</I>><i> +</I>><i> I created a "recorder" module, which functionality is to save the data to +</I>><i> the a file. +</I>><i> +</I>><i> +</I>><i> *#rawe_handler.erl*-module(rawec_handler). +</I>><i> -behaviour(cowboy_websocket_handler). +</I>><i> ...... +</I>><i> init(_, _, _) -> +</I>><i> case whereis(recorder) of +</I>><i> undefined -> +</I>><i> RecorderPid = recorder:start(), +</I>><i> register(recorder, RecorderPid); +</I>><i> _ -> ok +</I>><i> end, +</I>><i> {upgrade, protocol, cowboy_websocket}. +</I>><i> ..... +</I>><i> websocket_handle(_Frame, Req, State) -> +</I>><i> RecorderPid = whereis(recorder), +</I>><i> RecorderPid ! {rec, _Frame/binary}, +</I>><i> {ok, Req, State}. +</I>><i> +</I>><i> *#recorder.erl* +</I>><i> -module(recorder). +</I>><i> +</I>><i> -export([start/0, recorder_fun/1]). +</I>><i> -compile([debug_info]). +</I>><i> +</I>><i> recorder_fun(IoDevice) -> +</I>><i> receive +</I>><i> {rec, Data} -> +</I>><i> ok = file:write(IoDevice, Data), +</I>><i> io:format(Data), +</I>><i> recorder_fun(IoDevice); +</I>><i> {stop, _} -> +</I>><i> %%Close file +</I>><i> file:close(IoDevice) +</I>><i> end. +</I>><i> +</I>><i> start() -> +</I>><i> {ok, IoDevice} = file:open("/tmp/test_binary.wav", [write, +</I>><i> binary]), +</I>><i> spawn(recorder, recorder_fun, [IoDevice]). +</I>><i> +</I>><i> +</I>><i> When I start the console, and allow the microphone on the browser, I see +</I>><i> this error on the console: +</I>><i> +</I>><i> =ERROR REPORT==== 29-Sep-2014::18:13:03 === +</I>><i> Ranch listener http had connection process started with +</I>><i> cowboy_protocol:start_link/4 at <0.178.0> exit with reason: +</I>><i> *{[{reason,badarith},{mfa,{rawec_handler,websocket_handle,3*}},{stacktrace,[{rawec_handler,websocket_handle,3,[{file,"src/rawec_handler.erl"},{line,35}]},{cowboy_websocket,handler_call,7,[{file,"src/cowboy_websocket.erl"},{line,588}]},{cowboy_protocol,execute,4,[{file,"src/cowboy_protocol.erl"},{line,435}]}]},{msg,{binary,<<0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0....(ETC, +</I>><i> DATA STREAM CONTINUES) +</I>><i> +</I>><i> Probably my approach to do this is totally wrong. I there any obvious +</I>><i> problem here? +</I>><i> Can someone point me to a right direction?. Maybe I should write directly +</I>><i> to a file in the *websocket_handle *funcion, but how can I keep a file +</I>><i> opened during the streaming? +</I>><i> +</I>><i> The github repo is here: <A HREF="https://github.com/jmrepetti/rawec">https://github.com/jmrepetti/rawec</A> with the +</I>><i> whole source code if you want to take a look. +</I>><i> +</I>><i> +</I>><i> Thanks in advance, +</I>><i> Matias. +</I>><i> +</I>><i> _______________________________________________ +</I>><i> Extend mailing list +</I>><i> <A HREF="https://lists.ninenines.eu/listinfo/extend">Extend at lists.ninenines.eu</A> +</I>><i> <A HREF="https://lists.ninenines.eu/listinfo/extend">https://lists.ninenines.eu/listinfo/extend</A> +</I>><i> +</I>><i> +</I> + +-- +Eduardo +-------------- next part -------------- +An HTML attachment was scrubbed... +URL: <<A HREF="http://lists.ninenines.eu/archives/extend/attachments/20140930/6d952ce6/attachment-0001.html">http://lists.ninenines.eu/archives/extend/attachments/20140930/6d952ce6/attachment-0001.html</A>> +</PRE> + + +<!--endarticle--> + <HR> + <P><UL> + <!--threads--> + <LI>Previous message: <A HREF="000465.html">[99s-extend] Newbie, Cowboy + Websocket + Audio Recording +</A></li> + <LI>Next message: <A HREF="000467.html">[99s-extend] Newbie, Cowboy + Websocket + Audio Recording +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#466">[ date ]</a> + <a href="thread.html#466">[ thread ]</a> + <a href="subject.html#466">[ subject ]</a> + <a href="author.html#466">[ author ]</a> + </LI> + </UL> + +<hr> +<a href="https://lists.ninenines.eu/listinfo/extend">More information about the Extend +mailing list</a><br> +</body></html> |