input/lastfm: removed obsolete last.fm input plugin

This has been replaced by the last.fm playlist plugin.  The input
plugin has never worked well, and was just a playground to experiment
with the last.fm radio protocol.

1 files changed, 0 insertions, 469 deletions

diff --git a/src/input/lastfm_input_plugin.c b/src/input/lastfm_input_plugin.c
deleted file mode 100644
index 71e4b1ad4..000000000
--- a/src/input/lastfm_input_plugin.c
+++ /dev/null
@@ -1,469 +0,0 @@
-/*
- * Copyright (C) 2003-2009 The Music Player Daemon Project
- * http://www.musicpd.org
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include "input/lastfm_input_plugin.h"
-#include "input_plugin.h"
-#include "tag.h"
-#include "conf.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN "input_lastfm"
-
-static struct lastfm_data {
-	char *user;
-	char *md5;
-} lastfm_data;
-
-struct lastfm_input {
-	/* our very own plugin wrapper */
-	struct input_plugin wrap_plugin;
-
-	/* pointer to input stream's plugin */
-	const struct input_plugin *plugin;
-
-	/* pointer to input stream's data */
-	void *data;
-
-	/* current track's tag */
-	struct tag *tag;
-};
-
-static bool
-lastfm_input_init(const struct config_param *param)
-{
-	const char *passwd = config_get_block_string(param, "password", NULL);
-	const char *user = config_get_block_string(param, "user", NULL);
-	if (passwd == NULL || user == NULL)
-		return false;
-
-	lastfm_data.user = g_uri_escape_string(user, NULL, false);
-
-	if (strlen(passwd) != 32)
-		lastfm_data.md5 = g_compute_checksum_for_string(G_CHECKSUM_MD5,
-						    passwd, strlen(passwd));
-	else
-		lastfm_data.md5 = g_strdup(passwd);
-
-	return true;
-}
-
-static void
-lastfm_input_finish(void)
-{
-	g_free(lastfm_data.user);
-	g_free(lastfm_data.md5);
-}
-
-/**
- * Simple data fetcher.
- * @param url path or url of data to fetch.
- * @return data fetched, or NULL on error. Must be freed with g_free.
- */
-static char *
-lastfm_get(const char *url)
-{
-	struct input_stream input_stream;
-	bool success;
-	int ret;
-	char buffer[4096];
-	size_t length = 0, nbytes;
-
-	success = input_stream_open(&input_stream, url);
-	if (!success)
-		return NULL;
-
-	while (!input_stream.ready) {
-		ret = input_stream_buffer(&input_stream);
-		if (ret < 0) {
-			input_stream_close(&input_stream);
-			return NULL;
-		}
-	}
-
-	do {
-		nbytes = input_stream_read(&input_stream, buffer + length,
-					   sizeof(buffer) - length);
-		if (nbytes == 0) {
-			if (input_stream_eof(&input_stream))
-				break;
-
-			/* I/O error */
-			input_stream_close(&input_stream);
-			return NULL;
-		}
-
-		length += nbytes;
-	} while (length < sizeof(buffer));
-
-	input_stream_close(&input_stream);
-	return g_strndup(buffer, length);
-}
-
-/**
- * Ini-style value fetcher.
- * @param response data through which to search.
- * @param name name of value to search for.
- * @return value for param name in param reponse or NULL on error. Free with g_free.
- */
-static char *
-lastfm_find(const char *response, const char *name)
-{
-	size_t name_length = strlen(name);
-
-	while (true) {
-		const char *eol = strchr(response, '\n');
-		if (eol == NULL)
-			return NULL;
-
-		if (strncmp(response, name, name_length) == 0 &&
-		    response[name_length] == '=') {
-			response += name_length + 1;
-			return g_strndup(response, eol - response);
-		}
-
-		response = eol + 1;
-	}
-}
-
-/**
- * Replace XML's five predefined entities with the equivalant characters.
- * glib doesn't seem to have code to do this, even in the xml parser.
- * We don't manage numerical character references such as &#nnnn; or &#xhhhh;.
- * @param value XML text to decode.
- * @return decoded string, which must be freed with g_free.
- * @todo make sure this is ok for utf-8.
- */
-static char *
-lastfm_xmldecode(const char *value)
-{
-	struct entity {
-		const char *text;
-		char repl;
-	} entities[] = {
-		{"&amp;",  '&'},
-		{"&quot;", '"'},
-		{"&apos;", '\''},
-		{"&gt;",   '>'},
-		{"&lt;",   '<'}
-	};
-	char *txt = g_strdup(value);
-	unsigned int i;
-
-	for (i = 0; i < sizeof(entities)/sizeof(entities[0]); ++i) {
-		char *p;
-		int slen = strlen(entities[i].text);
-		while ((p = strstr(txt, entities[i].text))) {
-			*p = entities[i].repl;
-			g_strlcpy(p + 1, p + slen, strlen(p) - slen);
-		}
-	}
-	return txt;
-}
-
-/**
- * Extract the text between xml start and end tags specified by param tag.
- * Caveat: This function does not handle nested tags properly.
- * @param response XML to extract text from.
- * @param tag name of tag of which text should be extracted from.
- * @return text between tags specified by param tag, NULL on error; Must be freed with g_free.
- */
-static char *
-lastfm_xmltag(const char *response, const char *tag)
-{
-	char *tn = g_strconcat("<", tag, ">", NULL);
-	char *p, *q;
-
-	if (!(p = strstr(response, tn))) {
-		g_free(tn);
-		return NULL;
-	}
-
-	p += strlen(tn);
-	g_free(tn);
-
-	tn = g_strconcat("</", tag, ">", NULL);
-
-	if (!(q = strstr(p, tn))) {
-		g_free(tn);
-		return NULL;
-	}
-
-	g_free(tn);
-
-	return g_strndup(p, q - p);
-}
-
-/**
- * Parses xspf track and generates mpd tag.
- * @return tag which must be freed with tag_free.
- */
-static struct tag *
-lastfm_read_tag(const char *response)
-{
-	struct tagalias {
-		enum tag_type type;
-		const char *xmltag;
-	} aliases[] = {
-		{TAG_ARTIST, "creator"},
-		{TAG_TITLE, "title"},
-		{TAG_ALBUM, "album"}
-	};
-	struct tag *tag = tag_new();
-	unsigned int i;
-	char *track_time = lastfm_xmltag(response, "duration");
-
-	if (track_time != NULL) {
-		int mtime = strtol(track_time, 0, 0);
-		g_free(track_time);
-
-		/* make sure to round up */
-		tag->time = ((mtime + 999) / 1000);
-	}
-	else
-		tag->time = 0;
-
-	for (i = 0; i < sizeof(aliases)/sizeof(aliases[0]); ++i) {
-		char *p, *value = lastfm_xmltag(response, aliases[i].xmltag);
-		if (value == NULL)
-			continue;
-
-		p = lastfm_xmldecode(value);
-		g_free(value);
-		value = p;
-
-		tag_add_item(tag, aliases[i].type, value);
-		g_free(value);
-	}
-	return tag;
-}
-
-static size_t
-lastfm_input_read_wrap(struct input_stream *is, void *ptr, size_t size)
-{
-	size_t ret;
-	struct lastfm_input *d = is->data;
-	is->data = d->data;
-	ret = (* d->plugin->read)(is, ptr, size);
-	is->data = d;
-	return ret;
-}
-
-static bool
-lastfm_input_eof_wrap(struct input_stream *is)
-{
-	bool ret;
-	struct lastfm_input *d = is->data;
-	is->data = d->data;
-	ret = (* d->plugin->eof)(is);
-	is->data = d;
-	return ret;
-}
-
-static bool
-lastfm_input_seek_wrap(struct input_stream *is, goffset offset, int whence)
-{
-	bool ret;
-	struct lastfm_input *d = is->data;
-	is->data = d->data;
-	ret = (* d->plugin->seek)(is, offset, whence);
-	is->data = d;
-	return ret;
-}
-
-static int
-lastfm_input_buffer_wrap(struct input_stream *is)
-{
-	int ret;
-	struct lastfm_input *d = is->data;
-	is->data = d->data;
-	ret = (* d->plugin->buffer)(is);
-	is->data = d;
-	return ret;
-}
-
-static struct tag *
-lastfm_input_tag(struct input_stream *is)
-{
-	struct lastfm_input *d = is->data;
-	struct tag *tag = d->tag;
-	d->tag = NULL;
-	return tag;
-}
-
-static void
-lastfm_input_close(struct input_stream *is)
-{
-	struct lastfm_input *d = is->data;
-
-	if (is->plugin->close) {
-		is->data = d->data;
-		is->plugin = d->plugin;
-		(* is->plugin->close)(is);
-	}
-
-	if (d->tag)
-		tag_free(d->tag);
-	g_free(d);
-}
-
-static bool
-lastfm_input_open(struct input_stream *is, const char *url)
-{
-	char *p, *q, *response, *track, *session, *stream_url;
-	bool success;
-
-	if (strncmp(url, "lastfm://", 9) != 0)
-		return false;
-
-	/* handshake */
-
-	p = g_strconcat("http://ws.audioscrobbler.com/radio/handshake.php?"
-			"version=1.1.1&platform=linux&"
-			"username=", lastfm_data.user, "&"
-			"passwordmd5=", lastfm_data.md5, "&"
-			"debug=0&partner=", NULL);
-
-	response = lastfm_get(p);
-	g_free(p);
-	if (response == NULL)
-		return false;
-
-	/* extract session id from response */
-
-	session = lastfm_find(response, "session");
-	stream_url = lastfm_find(response, "stream_url");
-	g_free(response);
-	if (session == NULL || stream_url == NULL) {
-		g_free(session);
-		g_free(stream_url);
-		return false;
-	}
-
-	q = g_uri_escape_string(session, NULL, false);
-	g_free(session);
-	session = q;
-
-	/* "adjust" last.fm radio */
-
-	if (strlen(url) > 9) {
-		char *escaped_url;
-
-		escaped_url = g_uri_escape_string(url, NULL, false);
-		p = g_strconcat("http://ws.audioscrobbler.com/radio/adjust.php?"
-				"session=", session, "&url=", escaped_url, "&debug=0",
-				NULL);
-		g_free(escaped_url);
-
-		response = lastfm_get(p);
-		g_free(response);
-		g_free(p);
-
-		if (response == NULL) {
-			g_free(session);
-			g_free(stream_url);
-			return false;
-		}
-	}
-
-	/* load the last.fm playlist */
-
-	p = g_strconcat("http://ws.audioscrobbler.com/radio/xspf.php?"
-			"sk=", session, "&discovery=0&desktop=1.5.1.31879",
-			NULL);
-	g_free(session);
-
-	response = lastfm_get(p);
-	g_free(p);
-
-	if (response == NULL) {
-		g_free(stream_url);
-		return false;
-	}
-
-	/* From here on, we only care about the first track, extract that
-	 *
-	 * Note: if you want to get information about the next track (needed
-	 *   for continuous playback) extract the other track info here too.
-	 */
-
-	g_free(stream_url);
-	track = lastfm_xmltag(response, "track");
-	g_free(response);
-
-	/* If there are no tracks in the tracklist, it's possible that the
-	 * station doesn't have enough content.
-	 */
-
-	if (track == NULL)
-		return false;
-
-	stream_url = lastfm_xmltag(track, "location");
-	if (stream_url == NULL) {
-		g_free(track);
-		return false;
-	}
-
-	/* now really open the last.fm radio stream */
-
-	success = input_stream_open(is, stream_url);
-	if (success) {
-		/* instantiate our transparent wrapper plugin
-		 * this is needed so that the backend knows what functions are
-		 * properly available.
-		 */
-
-		struct lastfm_input *d = g_new0(struct lastfm_input, 1);
-		d->wrap_plugin.name = "lastfm";
-		d->wrap_plugin.open = lastfm_input_open;
-		d->wrap_plugin.close = lastfm_input_close;
-		d->wrap_plugin.read = lastfm_input_read_wrap;
-		d->wrap_plugin.eof = lastfm_input_eof_wrap;
-		d->wrap_plugin.tag = lastfm_input_tag;
-		if (is->seekable)
-			d->wrap_plugin.seek = lastfm_input_seek_wrap;
-		if (is->plugin->buffer)
-			d->wrap_plugin.buffer = lastfm_input_buffer_wrap;
-
-		d->tag = lastfm_read_tag(track);
-		d->plugin = is->plugin;
-		d->data = is->data;
-
-		/* give the backend our wrapper plugin */
-
-		is->plugin = &d->wrap_plugin;
-		is->data = d;
-	}
-
-	g_free(stream_url);
-	g_free(track);
-
-	return success;
-}
-
-const struct input_plugin lastfm_input_plugin = {
-	.name = "lastfm",
-	.init = lastfm_input_init,
-	.finish = lastfm_input_finish,
-	.open = lastfm_input_open,
-	.close = lastfm_input_close,
-	.tag  = lastfm_input_tag,
-};