* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
+/** @file server/actions.c
+ * @brief DisOrder web actions
+ *
+ * Actions are anything that the web interface does beyond passive template
+ * expansion and inspection of state recieved from the server. This means
+ * playing tracks, editing prefs etc but also setting extra headers e.g. to
+ * auto-refresh the playing list.
+ */
+
+#include "disorder-cgi.h"
+
+/** @brief Redirect to some other action or URL */
+static void redirect(const char *url) {
+ /* By default use the 'back' argument */
+ if(!url)
+ url = cgi_get("back");
+ if(url) {
+ if(!strncmp(url, "http", 4))
+ /* If the target is not a full URL assume it's the action */
+ url = cgi_makeurl(config->url, "action", url, (char *)0);
+ } else {
+ /* If back= is not set just go back to the front page */
+ url = config->url;
+ }
+ if(printf("Location: %s\n"
+ "%s\n"
+ "\n", url, dcgi_cookie_header()) < 0)
+ fatal(errno, "error writing to stdout");
+}
-#include <config.h>
-#include "types.h"
+/* 'playing' and 'manage' just add a Refresh: header */
+static void act_playing(void) {
+ long refresh = config->refresh;
+ long length;
+ time_t now, fin;
+ char *url;
+ const char *action;
-/** @brief Login cookie */
-char *login_cookie;
+ dcgi_lookup(DCGI_PLAYING|DCGI_QUEUE|DCGI_ENABLED|DCGI_RANDOM_ENABLED);
+ if(dcgi_playing
+ && dcgi_playing->state == playing_started /* i.e. not paused */
+ && !disorder_length(dcgi_client, dcgi_playing->track, &length)
+ && length
+ && dcgi_playing->sofar >= 0) {
+ /* Try to put the next refresh at the start of the next track. */
+ time(&now);
+ fin = now + length - dcgi_playing->sofar + config->gap;
+ if(now + refresh > fin)
+ refresh = fin - now;
+ }
+ if(dcgi_queue && dcgi_queue->state == playing_isscratch) {
+ /* next track is a scratch, don't leave more than the inter-track gap */
+ if(refresh > config->gap)
+ refresh = config->gap;
+ }
+ if(!dcgi_playing
+ && ((dcgi_queue
+ && dcgi_queue->state != playing_random)
+ || dcgi_random_enabled)
+ && dcgi_enabled) {
+ /* no track playing but playing is enabled and there is something coming
+ * up, must be in a gap */
+ if(refresh > config->gap)
+ refresh = config->gap;
+ }
+ if((action = cgi_get("action")))
+ url = cgi_makeurl(config->url, "action", action, (char *)0);
+ else
+ url = config->url;
+ if(printf("Content-Type: text/html\n"
+ "Refresh: %ld;url=%s\n"
+ "%s\n"
+ "\n",
+ refresh, url, dcgi_cookie_header()) < 0)
+ fatal(errno, "error writing to stdout");
+ dcgi_expand("playing");
+}
+
+static void act_disable(void) {
+ if(dcgi_client)
+ disorder_disable(dcgi_client);
+ redirect(0);
+}
+
+static void act_enable(void) {
+ if(dcgi_client)
+ disorder_enable(dcgi_client);
+ redirect(0);
+}
+
+static void act_random_disable(void) {
+ if(dcgi_client)
+ disorder_random_disable(dcgi_client);
+ redirect(0);
+}
+
+static void act_random_enable(void) {
+ if(dcgi_client)
+ disorder_random_enable(dcgi_client);
+ redirect(0);
+}
+
+static void act_pause(void) {
+ if(dcgi_client)
+ disorder_pause(dcgi_client);
+ redirect(0);
+}
+
+static void act_resume(void) {
+ if(dcgi_client)
+ disorder_resume(dcgi_client);
+ redirect(0);
+}
+
+static void act_remove(void) {
+ const char *id;
+ struct queue_entry *q;
+
+ if(dcgi_client) {
+ if(!(id = cgi_get("id")))
+ error(0, "missing 'id' argument");
+ else if(!(q = dcgi_findtrack(id)))
+ error(0, "unknown queue id %s", id);
+ else switch(q->state) {
+ case playing_isscratch:
+ case playing_failed:
+ case playing_no_player:
+ case playing_ok:
+ case playing_quitting:
+ case playing_scratched:
+ error(0, "does not make sense to scratch %s", id);
+ break;
+ case playing_paused: /* started but paused */
+ case playing_started: /* started to play */
+ disorder_scratch(dcgi_client, id);
+ break;
+ case playing_random: /* unplayed randomly chosen track */
+ case playing_unplayed: /* haven't played this track yet */
+ disorder_remove(dcgi_client, id);
+ break;
+ }
+ }
+ redirect(0);
+}
+
+static void act_move(void) {
+ const char *id, *delta;
+ struct queue_entry *q;
+
+ if(dcgi_client) {
+ if(!(id = cgi_get("id")))
+ error(0, "missing 'id' argument");
+ else if(!(delta = cgi_get("delta")))
+ error(0, "missing 'delta' argument");
+ else if(!(q = dcgi_findtrack(id)))
+ error(0, "unknown queue id %s", id);
+ else switch(q->state) {
+ case playing_random: /* unplayed randomly chosen track */
+ case playing_unplayed: /* haven't played this track yet */
+ disorder_move(dcgi_client, id, atol(delta));
+ break;
+ default:
+ error(0, "does not make sense to scratch %s", id);
+ break;
+ }
+ }
+ redirect(0);
+}
+
+static void act_play(void) {
+ const char *track, *dir;
+ char **tracks;
+ int ntracks, n;
+ struct dcgi_entry *e;
+
+ if(dcgi_client) {
+ if((track = cgi_get("file"))) {
+ disorder_play(dcgi_client, track);
+ } else if((dir = cgi_get("dir"))) {
+ if(disorder_files(dcgi_client, dir, 0, &tracks, &ntracks))
+ ntracks = 0;
+ e = xmalloc(ntracks * sizeof (struct dcgi_entry));
+ for(n = 0; n < ntracks; ++n) {
+ e[n].track = tracks[n];
+ e[n].sort = trackname_transform("track", tracks[n], "sort");
+ e[n].display = trackname_transform("track", tracks[n], "display");
+ }
+ qsort(e, ntracks, sizeof (struct dcgi_entry), dcgi_compare_entry);
+ for(n = 0; n < ntracks; ++n)
+ disorder_play(dcgi_client, e[n].track);
+ }
+ }
+ redirect(0);
+}
+
+static int clamp(int n, int min, int max) {
+ if(n < min)
+ return min;
+ if(n > max)
+ return max;
+ return n;
+}
+
+static void act_volume(void) {
+ const char *l, *r, *d;
+ int nd;
+
+ if(dcgi_client) {
+ if((d = cgi_get("delta"))) {
+ dcgi_lookup(DCGI_VOLUME);
+ nd = clamp(atoi(d), -255, 255);
+ disorder_set_volume(dcgi_client,
+ clamp(dcgi_volume_left + nd, 0, 255),
+ clamp(dcgi_volume_right + nd, 0, 255));
+ } else if((l = cgi_get("left")) && (r = cgi_get("right")))
+ disorder_set_volume(dcgi_client, atoi(l), atoi(r));
+ }
+ redirect(0);
+}
/** @brief Table of actions */
static const struct action {
/** @brief Action handler */
void (*handler)(void);
} actions[] = {
- { "confirm", act_confirm },
{ "disable", act_disable },
- { "edituser", act_edituser },
{ "enable", act_enable },
- { "login", act_login },
- { "logout", act_logout },
- { "manage", act_manage },
+ { "manage", act_playing },
{ "move", act_move },
{ "pause", act_pause },
{ "play", act_play },
{ "playing", act_playing },
- { "prefs", act_prefs },
- { "random-disable", act_random_disable },
- { "random-enable", act_random_enable },
- { "register", act_register },
- { "reminder", act_reminder },
+ { "randomdisable", act_random_disable },
+ { "randomenable", act_random_enable },
{ "remove", act_remove },
{ "resume", act_resume },
- { "scratch", act_scratch },
{ "volume", act_volume },
};
+/** @brief Check that an action name is valid
+ * @param name Action
+ * @return 1 if valid, 0 if not
+ */
+static int dcgi_valid_action(const char *name) {
+ int c;
+
+ /* First character must be letter or digit (this also requires there to _be_
+ * a first character) */
+ if(!isalnum((unsigned char)*name))
+ return 0;
+ /* Only letters, digits, '.' and '-' allowed */
+ while((c = (unsigned char)*name++)) {
+ if(!(isalnum(c)
+ || c == '.'
+ || c == '_'))
+ return 0;
+ }
+ return 1;
+}
+
/** @brief Expand a template
* @param name Base name of template, or NULL to consult CGI args
*/
-void disorder_cgi_expand(const char *name) {
- const char *p;
-
+void dcgi_expand(const char *name) {
+ const char *p, *found;
+
+ /* Parse macros first */
+ if((found = mx_find("macros.tmpl")))
+ mx_expand_file(found, sink_discard(), 0);
/* For unknown actions check that they aren't evil */
- for(p = name; *p && isalnum((unsigned char)*p); ++p)
- ;
- if(*p)
- fatal(0, "invalid action name '%s'", action);
- byte_xasprintf((char **)&p, "%s.tmpl", action);
- if(mx_expand_file(p, sink_stdio(stdout), 0) == -1
+ if(!dcgi_valid_action(name))
+ fatal(0, "invalid action name '%s'", name);
+ byte_xasprintf((char **)&p, "%s.tmpl", name);
+ if(!(found = mx_find(p)))
+ fatal(errno, "cannot find %s", p);
+ if(mx_expand_file(found, sink_stdio("stdout", stdout), 0) == -1
|| fflush(stdout) < 0)
fatal(errno, "error writing to stdout");
}
*
* If no recognized action is specified then 'playing' is assumed.
*/
-void disorder_cgi_action(const char *action) {
+void dcgi_action(const char *action) {
int n;
- char *s;
/* Consult CGI args if caller had no view */
if(!action)
action = "confirm";
else
action = "playing";
+ /* Make sure 'action' is always set */
+ cgi_set("action", action);
}
if((n = TABLE_FIND(actions, struct action, name, action)) >= 0)
/* Its a known action */
actions[n].handler();
- else
+ else {
/* Just expand the template */
- disorder_cgi_expand(action);
+ if(printf("Content-Type: text/html\n"
+ "%s\n"
+ "\n", dcgi_cookie_header()) < 0)
+ fatal(errno, "error writing to stdout");
+ dcgi_expand(action);
+ }
}
/** @brief Generate an error page */
-void disorder_cgi_error(const char *msg, ...) {
- va_list ap;
-
- va_start(ap, msg);
- byte_xvasprintf(&error_string, msg, ap);
- va_end(ap);
- disorder_cgi_expand("error");
-}
-
-/** @brief Log in as the current user or guest if none */
-void disorder_cgi_login(dcgi_state *ds, struct sink *output) {
- /* Junk old data */
- disorder_macros_reset();
- /* Reconnect */
- if(disorder_connect_cookie(client, login_cookie)) {
- disorder_cgi_error("Cannot connect to server");
- exit(0);
- }
- /* If there was a cookie but it went bad, we forget it */
- if(login_cookie && !strcmp(disorder_user(>client), "guest"))
- login_cookie = 0;
+void dcgi_error(const char *key) {
+ dcgi_error_string = xstrdup(key);
+ dcgi_expand("error");
}
/*
~mdw / disorder / blobdiff