/*** This file is part of PulseAudio. Copyright 2005-2006 Lennart Poettering PulseAudio is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. PulseAudio is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with PulseAudio; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. ***/ #ifdef HAVE_CONFIG_H #include #endif #include #include #include #include #include #include #include #include #include #include #include #include "protocol-http.h" /* Don't allow more than this many concurrent connections */ #define MAX_CONNECTIONS 10 #define internal_server_error(c) http_message((c), 500, "Internal Server Error", NULL) #define URL_ROOT "/" #define URL_CSS "/style" #define URL_STATUS "/status" struct connection { pa_http_protocol *protocol; pa_ioline *line; enum { REQUEST_LINE, MIME_HEADER, DATA } state; char *url; pa_module *module; }; struct pa_http_protocol { PA_REFCNT_DECLARE; pa_core *core; pa_idxset *connections; }; static void http_response(struct connection *c, int code, const char *msg, const char *mime) { char s[256]; pa_assert(c); pa_assert(msg); pa_assert(mime); pa_snprintf(s, sizeof(s), "HTTP/1.0 %i %s\n" "Connection: close\n" "Content-Type: %s\n" "Cache-Control: no-cache\n" "Expires: 0\n" "Server: "PACKAGE_NAME"/"PACKAGE_VERSION"\n" "\n", code, msg, mime); pa_ioline_puts(c->line, s); } static void http_message(struct connection *c, int code, const char *msg, const char *text) { char s[256]; pa_assert(c); http_response(c, code, msg, "text/html"); if (!text) text = msg; pa_snprintf(s, sizeof(s), "\n" "\n" "%s\n" "%s\n", text, text); pa_ioline_puts(c->line, s); pa_ioline_defer_close(c->line); } static void connection_unlink(struct connection *c) { pa_assert(c); if (c->url) pa_xfree(c->url); pa_idxset_remove_by_data(c->protocol->connections, c, NULL); pa_ioline_unref(c->line); pa_xfree(c); } 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 REQUEST_LINE: { if (memcmp(s, "GET ", 4)) goto fail; s +=4; c->url = pa_xstrndup(s, strcspn(s, " \r\n\t?")); c->state = MIME_HEADER; break; } case MIME_HEADER: { /* Ignore MIME headers */ if (strcspn(s, " \r\n") != 0) break; /* We're done */ c->state = DATA; pa_log_info("request for %s", c->url); if (!strcmp(c->url, URL_ROOT)) { char txt[256]; http_response(c, 200, "OK", "text/html"); pa_ioline_puts(c->line, "\n" "\n" ""PACKAGE_NAME" "PACKAGE_VERSION"\n" "\n"); pa_ioline_puts(c->line, "

"PACKAGE_NAME" "PACKAGE_VERSION"

\n" ""); #define PRINTF_FIELD(a,b) pa_ioline_printf(c->line, "\n",(a),(b)) PRINTF_FIELD("User Name:", pa_get_user_name(txt, sizeof(txt))); PRINTF_FIELD("Host name:", pa_get_host_name(txt, sizeof(txt))); PRINTF_FIELD("Default Sample Specification:", pa_sample_spec_snprint(txt, sizeof(txt), &c->protocol->core->default_sample_spec)); PRINTF_FIELD("Default Sink:", pa_namereg_get_default_sink_name(c->protocol->core)); PRINTF_FIELD("Default Source:", pa_namereg_get_default_source_name(c->protocol->core)); pa_ioline_puts(c->line, "

"); pa_ioline_puts(c->line, "

Click here for an extensive server status report.

"); pa_ioline_puts(c->line, "\n"); pa_ioline_defer_close(c->line); } else if (!strcmp(c->url, URL_CSS)) { http_response(c, 200, "OK", "text/css"); pa_ioline_puts(c->line, "body { color: black; background-color: white; margin: 0.5cm; }\n" "a:link, a:visited { color: #900000; }\n" "p { margin-left: 0.5cm; margin-right: 0.5cm; }\n" "h1 { color: #00009F; }\n" "h2 { color: #00009F; }\n" "ul { margin-left: .5cm; }\n" "ol { margin-left: .5cm; }\n" "pre { margin-left: .5cm; background-color: #f0f0f0; padding: 0.4cm;}\n" ".grey { color: #afafaf; }\n" "table { margin-left: 1cm; border:1px solid lightgrey; padding: 0.2cm; }\n" "td { padding-left:10px; padding-right:10px; }\n"); pa_ioline_defer_close(c->line); } else if (!strcmp(c->url, URL_STATUS)) { char *r; http_response(c, 200, "OK", "text/plain"); r = pa_full_status_string(c->protocol->core); pa_ioline_puts(c->line, r); pa_xfree(r); pa_ioline_defer_close(c->line); } else http_message(c, 404, "Not Found", NULL); break; } default: ; } return; fail: internal_server_error(c); } void pa_http_protocol_connect(pa_http_protocol *p, pa_iochannel *io, pa_module *m) { struct connection *c; 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_xnew(struct connection, 1); c->protocol = p; c->line = pa_ioline_new(io); c->state = REQUEST_LINE; c->url = NULL; c->module = m; pa_ioline_set_callback(c->line, line_callback, c); pa_idxset_put(p->connections, c, NULL); } void pa_http_protocol_disconnect(pa_http_protocol *p, pa_module *m) { struct connection *c; void *state = NULL; pa_assert(p); pa_assert(m); while ((c = pa_idxset_iterate(p->connections, &state, NULL))) 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_xnew(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_assert_se(pa_shared_remove(p->core, "http-protocol") >= 0); pa_xfree(p); }