static void put_playlist(sp_playlist *playlist,
struct evhttp_request *request,
void *userdata) {
// TODO(liesen): playlist there so that signatures of all handler methods are
// the same, but do they have to be?
assert(playlist == NULL);
sp_session *session = userdata;
json_error_t loads_error;
json_t *playlist_json = read_request_body_json(request, &loads_error);
if (playlist_json == NULL) {
send_error(request, HTTP_BADREQUEST,
loads_error.text ? loads_error.text : "Unable to parse JSON");
return;
}
// Parse playlist
if (!json_is_object(playlist_json)) {
send_error(request, HTTP_BADREQUEST, "Invalid playlist object");
return;
}
// Get title
json_t *title_json = json_object_get(playlist_json, "title");
if (title_json == NULL) {
json_decref(playlist_json);
send_error(request, HTTP_BADREQUEST,
"Invalid playlist: title is missing");
return;
}
if (!json_is_string(title_json)) {
json_decref(playlist_json);
send_error(request, HTTP_BADREQUEST,
"Invalid playlist: title is not a string");
return;
}
char title[kMaxPlaylistTitleLength];
strncpy(title, json_string_value(title_json), kMaxPlaylistTitleLength);
json_decref(playlist_json);
// Add new playlist
sp_playlistcontainer *pc = sp_session_playlistcontainer(session);
playlist = sp_playlistcontainer_add_new_playlist(pc, title);
if (playlist == NULL) {
send_error(request, HTTP_ERROR, "Unable to create playlist");
} else {
register_playlist_callbacks(playlist, request, &get_playlist,
&playlist_state_changed_callbacks, NULL);
}
}
static void get_playlist_subscribers(sp_playlist *playlist,
struct evhttp_request *request,
void *userdata) {
assert(sp_playlist_is_loaded(playlist));
sp_session *session = userdata;
register_playlist_callbacks(playlist, request,
&get_playlist_subscribers_callback,
&playlist_subscribers_changed_callbacks,
userdata);
sp_playlist_update_subscribers(session, playlist);
}
static void handle_user_request(struct evhttp_request *request,
char *action,
const char *canonical_username,
sp_session *session) {
if (action == NULL) {
evhttp_send_error(request, HTTP_BADREQUEST, "Bad Request");
return;
}
int http_method = evhttp_request_get_command(request);
switch (http_method) {
case EVHTTP_REQ_GET:
if (strncmp(action, "playlists", 9) == 0) {
sp_playlistcontainer *pc = sp_session_publishedcontainer_for_user_create(
session, canonical_username);
if (sp_playlistcontainer_is_loaded(pc)) {
get_user_playlists(pc, request, session);
} else {
register_playlistcontainer_callbacks(pc, request,
&get_user_playlists,
&playlistcontainer_loaded_callbacks,
session);
}
} else if (strncmp(action, "starred", 7) == 0) {
sp_playlist *playlist = sp_session_starred_for_user_create(session,
canonical_username);
if (sp_playlist_is_loaded(playlist)) {
get_playlist(playlist, request, session);
} else {
register_playlist_callbacks(playlist, request, &get_playlist,
&playlist_state_changed_callbacks,
session);
}
}
break;
case EVHTTP_REQ_PUT:
case EVHTTP_REQ_POST:
if (strncmp(action, "inbox", 5) == 0) {
put_user_inbox(canonical_username, request, session);
}
break;
default:
evhttp_send_error(request, HTTP_BADREQUEST, "Bad Request");
break;
}
}
static void put_playlist_remove_tracks(sp_playlist *playlist,
struct evhttp_request *request,
void *userdata) {
// sp_session *session = userdata;
const char *uri = evhttp_request_get_uri(request);
struct evkeyvalq query_fields;
evhttp_parse_query(uri, &query_fields);
// Parse index
const char *index_field = evhttp_find_header(&query_fields, "index");
int index;
if (index_field == NULL ||
sscanf(index_field, "%d", &index) <= 0 ||
index < 0) {
send_error(request, HTTP_BADREQUEST,
"Bad parameter: index must be numeric");
return;
}
const char *count_field = evhttp_find_header(&query_fields, "count");
int count;
if (count_field == NULL ||
sscanf(count_field, "%d", &count) <= 0 ||
count < 1) {
send_error(request, HTTP_BADREQUEST,
"Bad parameter: count must be numeric and positive");
return;
}
int *tracks = calloc(count, sizeof(int));
for (int i = 0; i < count; i++)
tracks[i] = index + i;
struct playlist_handler *handler = register_playlist_callbacks(
playlist, request, &get_playlist,
&playlist_update_in_progress_callbacks, NULL);
sp_error remove_tracks_error = sp_playlist_remove_tracks(playlist, tracks,
count);
if (remove_tracks_error != SP_ERROR_OK) {
sp_playlist_remove_callbacks(playlist, handler->playlist_callbacks, handler);
free(handler);
send_error_sp(request, HTTP_BADREQUEST, remove_tracks_error);
}
free(tracks);
}
// Request dispatcher
static void handle_request(struct evhttp_request *request,
void *userdata) {
evhttp_connection_set_timeout(request->evcon, 1);
evhttp_add_header(evhttp_request_get_output_headers(request),
"Server", "[email protected]/spotify-api-server");
// Check request method
int http_method = evhttp_request_get_command(request);
switch (http_method) {
case EVHTTP_REQ_GET:
case EVHTTP_REQ_PUT:
case EVHTTP_REQ_POST:
break;
default:
evhttp_send_error(request, HTTP_NOTIMPL, "Not Implemented");
return;
}
struct state *state = userdata;
sp_session *session = state->session;
char *uri = evhttp_decode_uri(evhttp_request_get_uri(request));
char *entity = strtok(uri, "/");
if (entity == NULL) {
evhttp_send_error(request, HTTP_BADREQUEST, "Bad Request");
free(uri);
return;
}
// Handle requests to /user/<user_name>/inbox
if (strncmp(entity, "user", 4) == 0) {
char *username = strtok(NULL, "/");
if (username == NULL) {
evhttp_send_error(request, HTTP_BADREQUEST, "Bad Request");
free(uri);
return;
}
char *action = strtok(NULL, "/");
handle_user_request(request, action, username, session);
free(uri);
return;
}
// Handle requests to /playlist/<playlist_uri>/<action>
if (strncmp(entity, "playlist", 8) != 0) {
evhttp_send_error(request, HTTP_BADREQUEST, "Bad Request");
free(uri);
return;
}
char *playlist_uri = strtok(NULL, "/");
if (playlist_uri == NULL) {
switch (http_method) {
case EVHTTP_REQ_PUT:
case EVHTTP_REQ_POST:
put_playlist(NULL, request, session);
break;
default:
send_error(request, HTTP_BADREQUEST, "Bad Request");
break;
}
free(uri);
return;
}
sp_link *playlist_link = sp_link_create_from_string(playlist_uri);
if (playlist_link == NULL) {
send_error(request, HTTP_NOTFOUND, "Playlist link not found");
free(uri);
return;
}
if (sp_link_type(playlist_link) != SP_LINKTYPE_PLAYLIST) {
sp_link_release(playlist_link);
send_error(request, HTTP_BADREQUEST, "Not a playlist link");
free(uri);
return;
}
sp_playlist *playlist = sp_playlist_create(session, playlist_link);
sp_link_release(playlist_link);
if (playlist == NULL) {
send_error(request, HTTP_NOTFOUND, "Playlist not found");
free(uri);
return;
}
sp_playlist_add_ref(playlist);
// Dispatch request
char *action = strtok(NULL, "/");
// Default request handler
handle_playlist_fn request_callback = ¬_implemented;
void *callback_userdata = session;
switch (http_method) {
case EVHTTP_REQ_GET:
{
if (action == NULL) {
// Send entire playlist
request_callback = &get_playlist;
} else if (strncmp(action, "collaborative", 13) == 0) {
request_callback = &get_playlist_collaborative;
} else if (strncmp(action, "subscribers", 11) == 0) {
request_callback = &get_playlist_subscribers;
}
}
break;
case EVHTTP_REQ_PUT:
case EVHTTP_REQ_POST:
{
if (strncmp(action, "add", 3) == 0) {
request_callback = &put_playlist_add_tracks;
} else if (strncmp(action, "remove", 6) == 0) {
request_callback = &put_playlist_remove_tracks;
} else if (strncmp(action, "patch", 5) == 0) {
callback_userdata = state;
request_callback = &put_playlist_patch;
}
}
break;
}
if (sp_playlist_is_loaded(playlist)) {
request_callback(playlist, request, callback_userdata);
} else {
// Wait for playlist to load
register_playlist_callbacks(playlist, request, request_callback,
&playlist_state_changed_callbacks,
callback_userdata);
}
free(uri);
}
static void put_playlist_patch(sp_playlist *playlist,
struct evhttp_request *request,
void *userdata) {
struct state *state = userdata;
struct evbuffer *buf = evhttp_request_get_input_buffer(request);
size_t buflen = evbuffer_get_length(buf);
if (buflen == 0) {
send_error(request, HTTP_BADREQUEST, "No body");
return;
}
// Read request body
json_error_t loads_error;
json_t *json = read_request_body_json(request, &loads_error);
if (json == NULL) {
send_error(request, HTTP_BADREQUEST,
loads_error.text ? loads_error.text : "Unable to parse JSON");
return;
}
if (!json_is_array(json)) {
json_decref(json);
send_error(request, HTTP_BADREQUEST, "Not valid JSON array");
return;
}
// Handle empty array
int num_tracks = json_array_size(json);
if (num_tracks == 0) {
send_reply(request, HTTP_OK, "OK", NULL);
return;
}
sp_track **tracks = calloc(num_tracks, sizeof (sp_track *));
int num_valid_tracks = 0;
for (int i = 0; i < num_tracks; i++) {
json_t *item = json_array_get(json, i);
if (!json_is_string(item)) {
json_decref(item);
continue;
}
char *uri = strdup(json_string_value(item));
sp_link *track_link = sp_link_create_from_string(uri);
free(uri);
if (track_link == NULL)
continue;
if (sp_link_type(track_link) != SP_LINKTYPE_TRACK) {
sp_link_release(track_link);
continue;
}
sp_track *track = sp_link_as_track(track_link);
if (track == NULL)
continue;
tracks[num_valid_tracks++] = track;
}
json_decref(json);
// Bail if no tracks could be read from input
if (num_valid_tracks == 0) {
send_error(request, HTTP_BADREQUEST, "No valid tracks");
free(tracks);
return;
}
tracks = realloc(tracks, num_valid_tracks * sizeof (sp_track *));
// Apply diff
apr_pool_t *pool = state->pool;
svn_diff_t *diff;
svn_error_t *diff_error = diff_playlist_tracks(&diff, playlist, tracks,
num_valid_tracks, pool);
if (diff_error != SVN_NO_ERROR) {
free(tracks);
svn_handle_error2(diff_error, stderr, false, "Diff");
send_error(request, HTTP_BADREQUEST, "Search failed");
return;
}
svn_error_t *apply_error = diff_playlist_tracks_apply(diff, playlist, tracks,
num_valid_tracks,
state->session);
if (apply_error != SVN_NO_ERROR) {
free(tracks);
svn_handle_error2(apply_error, stderr, false, "Updating playlist");
send_error(request, HTTP_BADREQUEST, "Could not apply diff");
return;
}
if (!sp_playlist_has_pending_changes(playlist)) {
free(tracks);
get_playlist(playlist, request, NULL);
return;
}
free(tracks);
register_playlist_callbacks(playlist, request, &get_playlist,
&playlist_update_in_progress_callbacks, NULL);
}
static void put_playlist_add_tracks(sp_playlist *playlist,
struct evhttp_request *request,
void *userdata) {
sp_session *session = userdata;
const char *uri = evhttp_request_get_uri(request);
struct evkeyvalq query_fields;
evhttp_parse_query(uri, &query_fields);
// Parse index
const char *index_field = evhttp_find_header(&query_fields, "index");
int index;
if (index_field == NULL || sscanf(index_field, "%d", &index) <= 0) {
index = sp_playlist_num_tracks(playlist);
}
// Parse JSON
json_error_t loads_error;
json_t *json = read_request_body_json(request, &loads_error);
if (json == NULL) {
send_error(request, HTTP_BADREQUEST,
loads_error.text ? loads_error.text : "Unable to parse JSON");
return;
}
if (!json_is_array(json)) {
json_decref(json);
send_error(request, HTTP_BADREQUEST, "Not valid JSON array");
return;
}
// Handle empty array
int num_tracks = json_array_size(json);
if (num_tracks == 0) {
send_reply(request, HTTP_OK, "OK", NULL);
return;
}
sp_track **tracks = calloc(num_tracks, sizeof (sp_track *));
int num_valid_tracks = json_to_tracks(json, tracks, num_tracks);
json_decref(json);
// Bail if no tracks could be read from input
if (num_valid_tracks == 0) {
send_error(request, HTTP_BADREQUEST, "No valid tracks");
free(tracks);
return;
}
struct playlist_handler *handler = register_playlist_callbacks(
playlist, request, &get_playlist,
&playlist_update_in_progress_callbacks, NULL);
sp_error add_tracks_error = sp_playlist_add_tracks(playlist, tracks,
num_valid_tracks,
index, session);
if (add_tracks_error != SP_ERROR_OK) {
sp_playlist_remove_callbacks(playlist, handler->playlist_callbacks,
handler);
free(handler);
send_error_sp(request, HTTP_BADREQUEST, add_tracks_error);
}
free(tracks);
}
