mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-03 09:01:50 -05:00
776 lines
19 KiB
C
776 lines
19 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2005-2009 Lennart Poettering
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <pulse/util.h>
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#include <pulse/xmalloc.h>
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#include <pulse/timeval.h>
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#include <pulsecore/ioline.h>
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#include <pulsecore/thread-mq.h>
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#include <pulsecore/macro.h>
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#include <pulsecore/log.h>
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#include <pulsecore/namereg.h>
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#include <pulsecore/cli-text.h>
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#include <pulsecore/shared.h>
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#include <pulsecore/core-error.h>
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#include <pulsecore/mime-type.h>
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#include "protocol-http.h"
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/* Don't allow more than this many concurrent connections */
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#define MAX_CONNECTIONS 10
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#define URL_ROOT "/"
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#define URL_CSS "/style"
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#define URL_STATUS "/status"
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#define URL_LISTEN "/listen"
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#define URL_LISTEN_SOURCE "/listen/source/"
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#define MIME_HTML "text/html; charset=utf-8"
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#define MIME_TEXT "text/plain; charset=utf-8"
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#define MIME_CSS "text/css"
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#define HTML_HEADER(t) \
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"<?xml version=\"1.0\"?>\n" \
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"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n" \
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"<html xmlns=\"http://www.w3.org/1999/xhtml\">\n" \
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" <head>\n" \
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" <title>"t"</title>\n" \
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" <link rel=\"stylesheet\" type=\"text/css\" href=\"style\"/>\n" \
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" </head>\n" \
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" <body>\n"
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#define HTML_FOOTER \
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" </body>\n" \
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"</html>\n"
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#define RECORD_BUFFER_SECONDS (5)
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#define DEFAULT_SOURCE_LATENCY (300*PA_USEC_PER_MSEC)
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enum state {
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STATE_REQUEST_LINE,
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STATE_MIME_HEADER,
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STATE_DATA
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};
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struct connection {
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pa_http_protocol *protocol;
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pa_iochannel *io;
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pa_ioline *line;
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pa_memblockq *output_memblockq;
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pa_source_output *source_output;
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pa_client *client;
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enum state state;
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char *url;
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pa_module *module;
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};
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struct pa_http_protocol {
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PA_REFCNT_DECLARE;
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pa_core *core;
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pa_idxset *connections;
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pa_strlist *servers;
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};
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enum {
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SOURCE_OUTPUT_MESSAGE_POST_DATA = PA_SOURCE_OUTPUT_MESSAGE_MAX
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};
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/* Called from main context */
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static void connection_unlink(struct connection *c) {
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pa_assert(c);
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if (c->source_output) {
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pa_source_output_unlink(c->source_output);
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c->source_output->userdata = NULL;
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pa_source_output_unref(c->source_output);
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}
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if (c->client)
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pa_client_free(c->client);
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pa_xfree(c->url);
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if (c->line)
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pa_ioline_unref(c->line);
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if (c->io)
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pa_iochannel_free(c->io);
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if (c->output_memblockq)
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pa_memblockq_free(c->output_memblockq);
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pa_idxset_remove_by_data(c->protocol->connections, c, NULL);
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pa_xfree(c);
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}
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/* Called from main context */
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static int do_write(struct connection *c) {
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pa_memchunk chunk;
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ssize_t r;
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void *p;
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pa_assert(c);
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if (pa_memblockq_peek(c->output_memblockq, &chunk) < 0)
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return 0;
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pa_assert(chunk.memblock);
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pa_assert(chunk.length > 0);
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p = pa_memblock_acquire(chunk.memblock);
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r = pa_iochannel_write(c->io, (uint8_t*) p+chunk.index, chunk.length);
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pa_memblock_release(chunk.memblock);
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pa_memblock_unref(chunk.memblock);
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if (r < 0) {
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if (errno == EINTR || errno == EAGAIN)
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return 0;
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pa_log("write(): %s", pa_cstrerror(errno));
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return -1;
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}
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pa_memblockq_drop(c->output_memblockq, (size_t) r);
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return 0;
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}
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/* Called from main context */
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static void do_work(struct connection *c) {
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pa_assert(c);
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if (pa_iochannel_is_hungup(c->io))
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goto fail;
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if (pa_iochannel_is_writable(c->io))
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if (do_write(c) < 0)
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goto fail;
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return;
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fail:
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connection_unlink(c);
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}
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/* Called from thread context, except when it is not */
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static int source_output_process_msg(pa_msgobject *m, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
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pa_source_output *o = PA_SOURCE_OUTPUT(m);
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struct connection *c;
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pa_source_output_assert_ref(o);
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if (!(c = o->userdata))
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return -1;
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switch (code) {
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case SOURCE_OUTPUT_MESSAGE_POST_DATA:
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/* While this function is usually called from IO thread
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* context, this specific command is not! */
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pa_memblockq_push_align(c->output_memblockq, chunk);
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do_work(c);
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break;
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default:
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return pa_source_output_process_msg(m, code, userdata, offset, chunk);
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}
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return 0;
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}
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/* Called from thread context */
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static void source_output_push_cb(pa_source_output *o, const pa_memchunk *chunk) {
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struct connection *c;
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pa_source_output_assert_ref(o);
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pa_assert_se(c = o->userdata);
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pa_assert(chunk);
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pa_asyncmsgq_post(pa_thread_mq_get()->outq, PA_MSGOBJECT(o), SOURCE_OUTPUT_MESSAGE_POST_DATA, NULL, 0, chunk, NULL);
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}
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/* Called from main context */
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static void source_output_kill_cb(pa_source_output *o) {
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struct connection*c;
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pa_source_output_assert_ref(o);
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pa_assert_se(c = o->userdata);
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connection_unlink(c);
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}
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/* Called from main context */
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static pa_usec_t source_output_get_latency_cb(pa_source_output *o) {
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struct connection*c;
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pa_source_output_assert_ref(o);
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pa_assert_se(c = o->userdata);
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return pa_bytes_to_usec(pa_memblockq_get_length(c->output_memblockq), &c->source_output->sample_spec);
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}
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/*** client callbacks ***/
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static void client_kill_cb(pa_client *client) {
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struct connection*c;
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pa_assert(client);
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pa_assert_se(c = client->userdata);
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connection_unlink(c);
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}
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/*** pa_iochannel callbacks ***/
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static void io_callback(pa_iochannel*io, void *userdata) {
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struct connection *c = userdata;
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pa_assert(c);
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pa_assert(io);
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do_work(c);
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}
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static char *escape_html(const char *t) {
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pa_strbuf *sb;
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const char *p, *e;
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sb = pa_strbuf_new();
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for (e = p = t; *p; p++) {
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if (*p == '>' || *p == '<' || *p == '&') {
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if (p > e) {
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pa_strbuf_putsn(sb, e, p-e);
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e = p + 1;
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}
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if (*p == '>')
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pa_strbuf_puts(sb, ">");
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else if (*p == '<')
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pa_strbuf_puts(sb, "<");
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else
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pa_strbuf_puts(sb, "&");
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}
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}
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if (p > e)
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pa_strbuf_putsn(sb, e, p-e);
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return pa_strbuf_tostring_free(sb);
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}
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static void http_response(
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struct connection *c,
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int code,
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const char *msg,
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const char *mime) {
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char *s;
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pa_assert(c);
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pa_assert(msg);
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pa_assert(mime);
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s = pa_sprintf_malloc(
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"HTTP/1.0 %i %s\n"
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"Connection: close\n"
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"Content-Type: %s\n"
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"Cache-Control: no-cache\n"
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"Expires: 0\n"
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"Server: "PACKAGE_NAME"/"PACKAGE_VERSION"\n"
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"\n", code, msg, mime);
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pa_ioline_puts(c->line, s);
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pa_xfree(s);
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}
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static void html_response(
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struct connection *c,
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int code,
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const char *msg,
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const char *text) {
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char *s;
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pa_assert(c);
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http_response(c, code, msg, MIME_HTML);
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if (!text)
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text = msg;
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s = pa_sprintf_malloc(
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HTML_HEADER("%s")
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"%s"
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HTML_FOOTER,
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text, text);
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pa_ioline_puts(c->line, s);
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pa_xfree(s);
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pa_ioline_defer_close(c->line);
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}
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static void html_print_field(pa_ioline *line, const char *left, const char *right) {
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char *eleft, *eright;
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eleft = escape_html(left);
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eright = escape_html(right);
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pa_ioline_printf(line,
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"<tr><td><b>%s</b></td>"
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"<td>%s</td></tr>\n", eleft, eright);
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pa_xfree(eleft);
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pa_xfree(eright);
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}
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static void handle_root(struct connection *c) {
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char *t;
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pa_assert(c);
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http_response(c, 200, "OK", MIME_HTML);
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pa_ioline_puts(c->line,
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HTML_HEADER(PACKAGE_NAME" "PACKAGE_VERSION)
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"<h1>"PACKAGE_NAME" "PACKAGE_VERSION"</h1>\n"
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"<table>\n");
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t = pa_get_user_name_malloc();
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html_print_field(c->line, "User Name:", t);
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pa_xfree(t);
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t = pa_get_host_name_malloc();
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html_print_field(c->line, "Host name:", t);
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pa_xfree(t);
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t = pa_machine_id();
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html_print_field(c->line, "Machine ID:", t);
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pa_xfree(t);
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t = pa_uname_string();
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html_print_field(c->line, "System:", t);
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pa_xfree(t);
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t = pa_sprintf_malloc("%lu", (unsigned long) getpid());
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html_print_field(c->line, "Process ID:", t);
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pa_xfree(t);
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pa_ioline_puts(c->line,
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"</table>\n"
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"<p><a href=\"" URL_STATUS "\">Show an extensive server status report</a></p>\n"
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"<p><a href=\"" URL_LISTEN "\">Monitor sinks and sources</a></p>\n"
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HTML_FOOTER);
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pa_ioline_defer_close(c->line);
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}
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static void handle_css(struct connection *c) {
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pa_assert(c);
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http_response(c, 200, "OK", MIME_CSS);
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pa_ioline_puts(c->line,
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"body { color: black; background-color: white; }\n"
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"a:link, a:visited { color: #900000; }\n"
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"div.news-date { font-size: 80%; font-style: italic; }\n"
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"pre { background-color: #f0f0f0; padding: 0.4cm; }\n"
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".grey { color: #8f8f8f; font-size: 80%; }"
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"table { margin-left: 1cm; border:1px solid lightgrey; padding: 0.2cm; }\n"
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"td { padding-left:10px; padding-right:10px; }\n");
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pa_ioline_defer_close(c->line);
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}
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static void handle_status(struct connection *c) {
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char *r;
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pa_assert(c);
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http_response(c, 200, "OK", MIME_TEXT);
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r = pa_full_status_string(c->protocol->core);
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pa_ioline_puts(c->line, r);
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pa_xfree(r);
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pa_ioline_defer_close(c->line);
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}
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static void handle_listen(struct connection *c) {
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pa_source *source;
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pa_sink *sink;
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uint32_t idx;
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http_response(c, 200, "OK", MIME_HTML);
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pa_ioline_puts(c->line,
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HTML_HEADER("Listen")
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"<h2>Sinks</h2>\n"
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"<p>\n");
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PA_IDXSET_FOREACH(sink, c->protocol->core->sinks, idx) {
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char *t, *m;
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t = escape_html(pa_strna(pa_proplist_gets(sink->proplist, PA_PROP_DEVICE_DESCRIPTION)));
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m = pa_sample_spec_to_mime_type_mimefy(&sink->sample_spec, &sink->channel_map);
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pa_ioline_printf(c->line,
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"<a href=\"" URL_LISTEN_SOURCE "%s\" title=\"%s\">%s</a><br/>\n",
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sink->monitor_source->name, m, t);
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pa_xfree(t);
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pa_xfree(m);
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}
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pa_ioline_puts(c->line,
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"</p>\n"
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"<h2>Sources</h2>\n"
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"<p>\n");
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PA_IDXSET_FOREACH(source, c->protocol->core->sources, idx) {
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char *t, *m;
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if (source->monitor_of)
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continue;
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t = escape_html(pa_strna(pa_proplist_gets(source->proplist, PA_PROP_DEVICE_DESCRIPTION)));
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m = pa_sample_spec_to_mime_type_mimefy(&source->sample_spec, &source->channel_map);
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pa_ioline_printf(c->line,
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"<a href=\"" URL_LISTEN_SOURCE "%s\" title=\"%s\">%s</a><br/>\n",
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source->name, m, t);
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pa_xfree(m);
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pa_xfree(t);
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}
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pa_ioline_puts(c->line,
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"</p>\n"
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HTML_FOOTER);
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pa_ioline_defer_close(c->line);
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}
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static void line_drain_callback(pa_ioline *l, void *userdata) {
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struct connection *c;
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pa_assert(l);
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pa_assert_se(c = userdata);
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/* We don't need the line reader anymore, instead we need a real
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* binary io channel */
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pa_assert_se(c->io = pa_ioline_detach_iochannel(c->line));
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pa_iochannel_set_callback(c->io, io_callback, c);
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pa_iochannel_socket_set_sndbuf(c->io, pa_memblockq_get_length(c->output_memblockq));
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pa_ioline_unref(c->line);
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c->line = NULL;
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}
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static void handle_listen_prefix(struct connection *c, const char *source_name) {
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pa_source *source;
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pa_source_output_new_data data;
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pa_sample_spec ss;
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pa_channel_map cm;
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char *t;
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size_t l;
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pa_assert(c);
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pa_assert(source_name);
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pa_assert(c->line);
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pa_assert(!c->io);
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if (!(source = pa_namereg_get(c->protocol->core, source_name, PA_NAMEREG_SOURCE))) {
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html_response(c, 404, "Source not found", NULL);
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return;
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}
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ss = source->sample_spec;
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cm = source->channel_map;
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pa_sample_spec_mimefy(&ss, &cm);
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pa_source_output_new_data_init(&data);
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data.driver = __FILE__;
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data.module = c->module;
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data.client = c->client;
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data.source = source;
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pa_proplist_update(data.proplist, PA_UPDATE_MERGE, c->client->proplist);
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pa_source_output_new_data_set_sample_spec(&data, &ss);
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pa_source_output_new_data_set_channel_map(&data, &cm);
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pa_source_output_new(&c->source_output, c->protocol->core, &data, 0);
|
|
pa_source_output_new_data_done(&data);
|
|
|
|
if (!c->source_output) {
|
|
html_response(c, 403, "Cannot create source output", NULL);
|
|
return;
|
|
}
|
|
|
|
c->source_output->parent.process_msg = source_output_process_msg;
|
|
c->source_output->push = source_output_push_cb;
|
|
c->source_output->kill = source_output_kill_cb;
|
|
c->source_output->get_latency = source_output_get_latency_cb;
|
|
c->source_output->userdata = c;
|
|
|
|
pa_source_output_set_requested_latency(c->source_output, DEFAULT_SOURCE_LATENCY);
|
|
|
|
l = (size_t) (pa_bytes_per_second(&ss)*RECORD_BUFFER_SECONDS);
|
|
c->output_memblockq = pa_memblockq_new(
|
|
0,
|
|
l,
|
|
0,
|
|
pa_frame_size(&ss),
|
|
1,
|
|
0,
|
|
0,
|
|
NULL);
|
|
|
|
pa_source_output_put(c->source_output);
|
|
|
|
t = pa_sample_spec_to_mime_type(&ss, &cm);
|
|
http_response(c, 200, "OK", t);
|
|
pa_xfree(t);
|
|
|
|
pa_ioline_set_callback(c->line, NULL, NULL);
|
|
|
|
if (pa_ioline_is_drained(c->line))
|
|
line_drain_callback(c->line, c);
|
|
else
|
|
pa_ioline_set_drain_callback(c->line, line_drain_callback, c);
|
|
}
|
|
|
|
static void handle_url(struct connection *c) {
|
|
pa_assert(c);
|
|
|
|
pa_log_debug("Request for %s", c->url);
|
|
|
|
if (pa_streq(c->url, URL_ROOT))
|
|
handle_root(c);
|
|
else if (pa_streq(c->url, URL_CSS))
|
|
handle_css(c);
|
|
else if (pa_streq(c->url, URL_STATUS))
|
|
handle_status(c);
|
|
else if (pa_streq(c->url, URL_LISTEN))
|
|
handle_listen(c);
|
|
else if (pa_startswith(c->url, URL_LISTEN_SOURCE))
|
|
handle_listen_prefix(c, c->url + sizeof(URL_LISTEN_SOURCE)-1);
|
|
else
|
|
html_response(c, 404, "Not Found", NULL);
|
|
}
|
|
|
|
static void line_callback(pa_ioline *line, const char *s, void *userdata) {
|
|
struct connection *c = userdata;
|
|
pa_assert(line);
|
|
pa_assert(c);
|
|
|
|
if (!s) {
|
|
/* EOF */
|
|
connection_unlink(c);
|
|
return;
|
|
}
|
|
|
|
switch (c->state) {
|
|
case STATE_REQUEST_LINE: {
|
|
if (!pa_startswith(s, "GET "))
|
|
goto fail;
|
|
|
|
s +=4;
|
|
|
|
c->url = pa_xstrndup(s, strcspn(s, " \r\n\t?"));
|
|
c->state = STATE_MIME_HEADER;
|
|
break;
|
|
}
|
|
|
|
case STATE_MIME_HEADER: {
|
|
|
|
/* Ignore MIME headers */
|
|
if (strcspn(s, " \r\n") != 0)
|
|
break;
|
|
|
|
/* We're done */
|
|
c->state = STATE_DATA;
|
|
|
|
handle_url(c);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
;
|
|
}
|
|
|
|
return;
|
|
|
|
fail:
|
|
html_response(c, 500, "Internal Server Error", NULL);
|
|
}
|
|
|
|
void pa_http_protocol_connect(pa_http_protocol *p, pa_iochannel *io, pa_module *m) {
|
|
struct connection *c;
|
|
pa_client_new_data client_data;
|
|
char pname[128];
|
|
|
|
pa_assert(p);
|
|
pa_assert(io);
|
|
pa_assert(m);
|
|
|
|
if (pa_idxset_size(p->connections)+1 > MAX_CONNECTIONS) {
|
|
pa_log("Warning! Too many connections (%u), dropping incoming connection.", MAX_CONNECTIONS);
|
|
pa_iochannel_free(io);
|
|
return;
|
|
}
|
|
|
|
c = pa_xnew0(struct connection, 1);
|
|
c->protocol = p;
|
|
c->state = STATE_REQUEST_LINE;
|
|
c->module = m;
|
|
|
|
c->line = pa_ioline_new(io);
|
|
pa_ioline_set_callback(c->line, line_callback, c);
|
|
|
|
pa_client_new_data_init(&client_data);
|
|
client_data.module = c->module;
|
|
client_data.driver = __FILE__;
|
|
pa_iochannel_socket_peer_to_string(io, pname, sizeof(pname));
|
|
pa_proplist_setf(client_data.proplist, PA_PROP_APPLICATION_NAME, "HTTP client (%s)", pname);
|
|
pa_proplist_sets(client_data.proplist, "http-protocol.peer", pname);
|
|
c->client = pa_client_new(p->core, &client_data);
|
|
pa_client_new_data_done(&client_data);
|
|
|
|
if (!c->client)
|
|
goto fail;
|
|
|
|
c->client->kill = client_kill_cb;
|
|
c->client->userdata = c;
|
|
|
|
pa_idxset_put(p->connections, c, NULL);
|
|
|
|
return;
|
|
|
|
fail:
|
|
if (c)
|
|
connection_unlink(c);
|
|
}
|
|
|
|
void pa_http_protocol_disconnect(pa_http_protocol *p, pa_module *m) {
|
|
struct connection *c;
|
|
uint32_t idx;
|
|
|
|
pa_assert(p);
|
|
pa_assert(m);
|
|
|
|
PA_IDXSET_FOREACH(c, p->connections, idx)
|
|
if (c->module == m)
|
|
connection_unlink(c);
|
|
}
|
|
|
|
static pa_http_protocol* http_protocol_new(pa_core *c) {
|
|
pa_http_protocol *p;
|
|
|
|
pa_assert(c);
|
|
|
|
p = pa_xnew0(pa_http_protocol, 1);
|
|
PA_REFCNT_INIT(p);
|
|
p->core = c;
|
|
p->connections = pa_idxset_new(NULL, NULL);
|
|
|
|
pa_assert_se(pa_shared_set(c, "http-protocol", p) >= 0);
|
|
|
|
return p;
|
|
}
|
|
|
|
pa_http_protocol* pa_http_protocol_get(pa_core *c) {
|
|
pa_http_protocol *p;
|
|
|
|
if ((p = pa_shared_get(c, "http-protocol")))
|
|
return pa_http_protocol_ref(p);
|
|
|
|
return http_protocol_new(c);
|
|
}
|
|
|
|
pa_http_protocol* pa_http_protocol_ref(pa_http_protocol *p) {
|
|
pa_assert(p);
|
|
pa_assert(PA_REFCNT_VALUE(p) >= 1);
|
|
|
|
PA_REFCNT_INC(p);
|
|
|
|
return p;
|
|
}
|
|
|
|
void pa_http_protocol_unref(pa_http_protocol *p) {
|
|
struct connection *c;
|
|
|
|
pa_assert(p);
|
|
pa_assert(PA_REFCNT_VALUE(p) >= 1);
|
|
|
|
if (PA_REFCNT_DEC(p) > 0)
|
|
return;
|
|
|
|
while ((c = pa_idxset_first(p->connections, NULL)))
|
|
connection_unlink(c);
|
|
|
|
pa_idxset_free(p->connections, NULL, NULL);
|
|
|
|
pa_strlist_free(p->servers);
|
|
|
|
pa_assert_se(pa_shared_remove(p->core, "http-protocol") >= 0);
|
|
|
|
pa_xfree(p);
|
|
}
|
|
|
|
void pa_http_protocol_add_server_string(pa_http_protocol *p, const char *name) {
|
|
pa_assert(p);
|
|
pa_assert(PA_REFCNT_VALUE(p) >= 1);
|
|
pa_assert(name);
|
|
|
|
p->servers = pa_strlist_prepend(p->servers, name);
|
|
}
|
|
|
|
void pa_http_protocol_remove_server_string(pa_http_protocol *p, const char *name) {
|
|
pa_assert(p);
|
|
pa_assert(PA_REFCNT_VALUE(p) >= 1);
|
|
pa_assert(name);
|
|
|
|
p->servers = pa_strlist_remove(p->servers, name);
|
|
}
|
|
|
|
pa_strlist *pa_http_protocol_servers(pa_http_protocol *p) {
|
|
pa_assert(p);
|
|
pa_assert(PA_REFCNT_VALUE(p) >= 1);
|
|
|
|
return p->servers;
|
|
}
|