| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2004-2008 Richard Kettlewell |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 18 | * USA |
| 19 | */ |
| 20 | |
| 21 | #include <config.h> |
| 22 | #include "types.h" |
| 23 | |
| 24 | #include "actions.h" |
| 25 | #include "lookups.h" |
| 26 | |
| 27 | /** @brief Login cookie */ |
| 28 | char *login_cookie; |
| 29 | |
| 30 | /* 'playing' and 'manage' just add a Refresh: header */ |
| 31 | static void act_playing(void) { |
| 32 | long refresh = config->refresh; |
| 33 | long length; |
| 34 | time_t now, fin; |
| 35 | char *url; |
| 36 | |
| 37 | lookups(DC_PLAYING|DC_QUEUE|DC_ENABLED|DC_RANDOM_ENABLED); |
| 38 | if(playing |
| 39 | && playing->state == playing_started /* i.e. not paused */ |
| 40 | && !disorder_length(client, playing->track, &length) |
| 41 | && length |
| 42 | && playing->sofar >= 0) { |
| 43 | /* Try to put the next refresh at the start of the next track. */ |
| 44 | time(&now); |
| 45 | fin = now + length - playing->sofar + config->gap; |
| 46 | if(now + refresh > fin) |
| 47 | refresh = fin - now; |
| 48 | } |
| 49 | if(queue && queue->state == playing_isscratch) { |
| 50 | /* next track is a scratch, don't leave more than the inter-track gap */ |
| 51 | if(refresh > config->gap) |
| 52 | refresh = config->gap; |
| 53 | } |
| 54 | if(!playing |
| 55 | && ((queue |
| 56 | && queue->state != playing_random) |
| 57 | || random_enabled) |
| 58 | && enabled) { |
| 59 | /* no track playing but playing is enabled and there is something coming |
| 60 | * up, must be in a gap */ |
| 61 | if(refresh > config->gap) |
| 62 | refresh = config->gap; |
| 63 | } |
| 64 | if((action = cgi_get("action"))) |
| 65 | url = cgi_makeurl(config->url, "action", action, (char *)0); |
| 66 | else |
| 67 | url = config->url; |
| 68 | if(printf("Content-Type: text/html\n" |
| 69 | "Refresh: %ld;url=%s\n" |
| 70 | /* TODO cookie */ |
| 71 | "\n", |
| 72 | refresh, url) < 0) |
| 73 | fatal(errno, "error writing to stdout"); |
| 74 | disorder_cgi_expand(action ? action : "playing"); |
| 75 | } |
| 76 | |
| 77 | /** @brief Table of actions */ |
| 78 | static const struct action { |
| 79 | /** @brief Action name */ |
| 80 | const char *name; |
| 81 | /** @brief Action handler */ |
| 82 | void (*handler)(void); |
| 83 | } actions[] = { |
| 84 | { "confirm", act_confirm }, |
| 85 | { "disable", act_disable }, |
| 86 | { "edituser", act_edituser }, |
| 87 | { "enable", act_enable }, |
| 88 | { "login", act_login }, |
| 89 | { "logout", act_logout }, |
| 90 | { "manage", act_playing }, |
| 91 | { "move", act_move }, |
| 92 | { "pause", act_pause }, |
| 93 | { "play", act_play }, |
| 94 | { "playing", act_playing }, |
| 95 | { "prefs", act_prefs }, |
| 96 | { "random-disable", act_random_disable }, |
| 97 | { "random-enable", act_random_enable }, |
| 98 | { "register", act_register }, |
| 99 | { "reminder", act_reminder }, |
| 100 | { "remove", act_remove }, |
| 101 | { "resume", act_resume }, |
| 102 | { "scratch", act_scratch }, |
| 103 | { "volume", act_volume }, |
| 104 | }; |
| 105 | |
| 106 | /** @brief Expand a template |
| 107 | * @param name Base name of template, or NULL to consult CGI args |
| 108 | */ |
| 109 | void disorder_cgi_expand(const char *name) { |
| 110 | const char *p; |
| 111 | |
| 112 | /* For unknown actions check that they aren't evil */ |
| 113 | for(p = name; *p && isalnum((unsigned char)*p); ++p) |
| 114 | ; |
| 115 | if(*p) |
| 116 | fatal(0, "invalid action name '%s'", action); |
| 117 | byte_xasprintf((char **)&p, "%s.tmpl", action); |
| 118 | if(mx_expand_file(p, sink_stdio(stdout), 0) == -1 |
| 119 | || fflush(stdout) < 0) |
| 120 | fatal(errno, "error writing to stdout"); |
| 121 | } |
| 122 | |
| 123 | /** @brief Execute a web action |
| 124 | * @param action Action to perform, or NULL to consult CGI args |
| 125 | * |
| 126 | * If no recognized action is specified then 'playing' is assumed. |
| 127 | */ |
| 128 | void disorder_cgi_action(const char *action) { |
| 129 | int n; |
| 130 | char *s; |
| 131 | |
| 132 | /* Consult CGI args if caller had no view */ |
| 133 | if(!action) |
| 134 | action = cgi_get("action"); |
| 135 | /* Pick a default if nobody cares at all */ |
| 136 | if(!action) { |
| 137 | /* We allow URLs which are just c=... in order to keep confirmation URLs, |
| 138 | * which are user-facing, as short as possible. Actually we could lose the |
| 139 | * c= for this... */ |
| 140 | if(cgi_get("c")) |
| 141 | action = "confirm"; |
| 142 | else |
| 143 | action = "playing"; |
| 144 | } |
| 145 | if((n = TABLE_FIND(actions, struct action, name, action)) >= 0) |
| 146 | /* Its a known action */ |
| 147 | actions[n].handler(); |
| 148 | else { |
| 149 | /* Just expand the template */ |
| 150 | if(printf("Content-Type: text/html\n" |
| 151 | /* TODO cookie */ |
| 152 | "\n") < 0) |
| 153 | fatal(errno, "error writing to stdout"); |
| 154 | disorder_cgi_expand(action); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | /** @brief Generate an error page */ |
| 159 | void disorder_cgi_error(const char *msg, ...) { |
| 160 | va_list ap; |
| 161 | |
| 162 | va_start(ap, msg); |
| 163 | byte_xvasprintf(&error_string, msg, ap); |
| 164 | va_end(ap); |
| 165 | disorder_cgi_expand("error"); |
| 166 | } |
| 167 | |
| 168 | /** @brief Log in as the current user or guest if none */ |
| 169 | void disorder_cgi_login(dcgi_state *ds, struct sink *output) { |
| 170 | /* Junk old data */ |
| 171 | disorder_macros_reset(); |
| 172 | /* Reconnect */ |
| 173 | if(disorder_connect_cookie(client, login_cookie)) { |
| 174 | disorder_cgi_error("Cannot connect to server"); |
| 175 | exit(0); |
| 176 | } |
| 177 | /* If there was a cookie but it went bad, we forget it */ |
| 178 | if(login_cookie && !strcmp(disorder_user(>client), "guest")) |
| 179 | login_cookie = 0; |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | Local Variables: |
| 184 | c-basic-offset:2 |
| 185 | comment-column:40 |
| 186 | fill-column:79 |
| 187 | indent-tabs-mode:nil |
| 188 | End: |
| 189 | */ |