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playlist/{asx,rss,xspf}: use Expat instead of GLib to parse XML

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This commit is contained in:
Max Kellermann 2014-01-09 11:57:47 +01:00
parent dab052e53d
commit dd82370a80
8 changed files with 223 additions and 259 deletions
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13
Makefile.am
View File

@ -1016,11 +1016,13 @@ libplaylist_plugins_a_SOURCES = \
src/playlist/EmbeddedCuePlaylistPlugin.hxx \
src/PlaylistRegistry.cxx src/PlaylistRegistry.hxx
libplaylist_plugins_a_CPPFLAGS = $(AM_CPPFLAGS) \
$(EXPAT_CFLAGS) \
$(YAJL_CFLAGS) \
$(patsubst -I%/FLAC,-I%,$(FLAC_CFLAGS))
PLAYLIST_LIBS = \
libplaylist_plugins.a \
$(EXPAT_LIBS) \
$(FLAC_LIBS)
if ENABLE_DESPOTIFY
@ -1036,10 +1038,9 @@ libplaylist_plugins_a_SOURCES += \
PLAYLIST_LIBS += $(YAJL_LIBS)
endif
if HAVE_GLIB
if HAVE_EXPAT
libplaylist_plugins_a_SOURCES += \
src/playlist/PlsPlaylistPlugin.cxx \
src/playlist/PlsPlaylistPlugin.hxx \
src/Expat.cxx src/Expat.hxx \
src/playlist/XspfPlaylistPlugin.cxx \
src/playlist/XspfPlaylistPlugin.hxx \
src/playlist/AsxPlaylistPlugin.cxx \
@ -1048,6 +1049,12 @@ libplaylist_plugins_a_SOURCES += \
src/playlist/RssPlaylistPlugin.hxx
endif
if HAVE_GLIB
libplaylist_plugins_a_SOURCES += \
src/playlist/PlsPlaylistPlugin.cxx \
src/playlist/PlsPlaylistPlugin.hxx
endif
#
# Filter plugins
#

14
configure.ac
View File

@ -229,6 +229,11 @@ AC_ARG_ENABLE(libmpdclient,
[enable support for the MPD client]),,
enable_libmpdclient=auto)
AC_ARG_ENABLE(expat,
AS_HELP_STRING([--enable-expat],
[enable the expat XML parser]),,
enable_expat=auto)
AC_ARG_ENABLE(adplug,
AS_HELP_STRING([--enable-adplug],
[enable the AdPlug decoder plugin (default: auto)]),,
@ -639,6 +644,15 @@ fi
AM_CONDITIONAL(HAVE_LIBMPDCLIENT, test x$enable_libmpdclient = xyes)
dnl -------------------------------- expat --------------------------------
MPD_AUTO_PKG(expat, EXPAT, [expat],
[expat XML parser], [expat not found])
if test x$enable_expat = xyes; then
AC_DEFINE(HAVE_EXPAT, 1, [Define to use the expat XML parser])
fi
AM_CONDITIONAL(HAVE_EXPAT, test x$enable_expat = xyes)
dnl --------------------------------- inotify ---------------------------------
AC_CHECK_FUNCS(inotify_init inotify_init1)

76
src/Expat.cxx Normal file
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@ -0,0 +1,76 @@
/*
* Copyright (C) 2003-2014 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 "config.h"
#include "Expat.hxx"
#include "InputStream.hxx"
#include "util/ASCII.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
#include <string.h>
static constexpr Domain expat_domain("expat");
void
ExpatParser::SetError(Error &error)
{
XML_Error code = XML_GetErrorCode(parser);
error.Format(expat_domain, int(code), "XML parser failed: %s",
XML_ErrorString(code));
}
bool
ExpatParser::Parse(InputStream &is, Error &error)
{
assert(is.ready);
while (true) {
char buffer[4096];
size_t nbytes = is.LockRead(buffer, sizeof(buffer), error);
if (nbytes == 0)
break;
if (XML_Parse(parser, buffer, nbytes, false) != XML_STATUS_OK) {
SetError(error);
return false;
}
}
if (error.IsDefined())
return false;
if (XML_Parse(parser, "", 0, true) != XML_STATUS_OK) {
SetError(error);
return false;
}
return true;
}
const char *
ExpatParser::GetAttributeCase(const XML_Char **atts,
const char *name)
{
for (unsigned i = 0; atts[i] != nullptr; ++i)
if (StringEqualsCaseASCII(atts[i], name))
return atts[i] + strlen(name) + 1;
return nullptr;
}

63
src/Expat.hxx Normal file
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@ -0,0 +1,63 @@
/*
* Copyright (C) 2003-2014 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.
*/
#ifndef MPD_EXPAT_HXX
#define MPD_EXPAT_HXX
#include "check.h"
#include "Compiler.h"
#include <expat.h>
struct InputStream;
class Error;
class ExpatParser final {
const XML_Parser parser;
public:
ExpatParser(void *userData)
:parser(XML_ParserCreate(nullptr)) {
XML_SetUserData(parser, userData);
}
~ExpatParser() {
XML_ParserFree(parser);
}
void SetElementHandler(XML_StartElementHandler start,
XML_EndElementHandler end) {
XML_SetElementHandler(parser, start, end);
}
void SetCharacterDataHandler(XML_CharacterDataHandler charhndl) {
XML_SetCharacterDataHandler(parser, charhndl);
}
bool Parse(InputStream &is, Error &error);
gcc_pure
static const char *GetAttributeCase(const XML_Char **atts,
const char *name);
private:
void SetError(Error &error);
};
#endif

4
src/PlaylistRegistry.cxx
View File

@ -46,10 +46,12 @@
const struct playlist_plugin *const playlist_plugins[] = {
&extm3u_playlist_plugin,
&m3u_playlist_plugin,
&xspf_playlist_plugin,
&pls_playlist_plugin,
#ifdef HAVE_EXPAT
&xspf_playlist_plugin,
&asx_playlist_plugin,
&rss_playlist_plugin,
#endif
#ifdef ENABLE_DESPOTIFY
&despotify_playlist_plugin,
#endif

112
src/playlist/AsxPlaylistPlugin.cxx
View File

@ -21,20 +21,13 @@
#include "AsxPlaylistPlugin.hxx"
#include "PlaylistPlugin.hxx"
#include "MemorySongEnumerator.hxx"
#include "InputStream.hxx"
#include "Song.hxx"
#include "tag/TagBuilder.hxx"
#include "util/ASCII.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
#include "Expat.hxx"
#include "Log.hxx"
#include <glib.h>
#include <string.h>
static constexpr Domain asx_domain("asx");
/**
* This is the state object for the GLib XML parser.
*/
@ -71,23 +64,9 @@ struct AsxParser {
};
static const gchar *
get_attribute(const gchar **attribute_names, const gchar **attribute_values,
const gchar *name)
{
for (unsigned i = 0; attribute_names[i] != nullptr; ++i)
if (StringEqualsCaseASCII(attribute_names[i], name))
return attribute_values[i];
return nullptr;
}
static void
asx_start_element(gcc_unused GMarkupParseContext *context,
const gchar *element_name,
const gchar **attribute_names,
const gchar **attribute_values,
gpointer user_data, gcc_unused GError **error)
static void XMLCALL
asx_start_element(void *user_data, const XML_Char *element_name,
const XML_Char **atts)
{
AsxParser *parser = (AsxParser *)user_data;
@ -103,9 +82,8 @@ asx_start_element(gcc_unused GMarkupParseContext *context,
case AsxParser::ENTRY:
if (StringEqualsCaseASCII(element_name, "ref")) {
const gchar *href = get_attribute(attribute_names,
attribute_values,
"href");
const char *href =
ExpatParser::GetAttributeCase(atts, "href");
if (href != nullptr)
parser->location = href;
} else if (StringEqualsCaseASCII(element_name, "author"))
@ -119,10 +97,8 @@ asx_start_element(gcc_unused GMarkupParseContext *context,
}
}
static void
asx_end_element(gcc_unused GMarkupParseContext *context,
const gchar *element_name,
gpointer user_data, gcc_unused GError **error)
static void XMLCALL
asx_end_element(void *user_data, const XML_Char *element_name)
{
AsxParser *parser = (AsxParser *)user_data;
@ -144,10 +120,8 @@ asx_end_element(gcc_unused GMarkupParseContext *context,
}
}
static void
asx_text(gcc_unused GMarkupParseContext *context,
const gchar *text, gsize text_len,
gpointer user_data, gcc_unused GError **error)
static void XMLCALL
asx_char_data(void *user_data, const XML_Char *s, int len)
{
AsxParser *parser = (AsxParser *)user_data;
@ -156,23 +130,13 @@ asx_text(gcc_unused GMarkupParseContext *context,
break;
case AsxParser::ENTRY:
if (parser->tag_type != TAG_NUM_OF_ITEM_TYPES) {
parser->tag_builder.AddItem(parser->tag_type,
text, text_len);
}
if (parser->tag_type != TAG_NUM_OF_ITEM_TYPES)
parser->tag_builder.AddItem(parser->tag_type, s, len);
break;
}
}
static const GMarkupParser asx_parser = {
asx_start_element,
asx_end_element,
asx_text,
nullptr,
nullptr,
};
/*
* The playlist object
*
@ -182,57 +146,21 @@ static SongEnumerator *
asx_open_stream(InputStream &is)
{
AsxParser parser;
bool success;
Error error2;
GError *error = nullptr;
/* parse the ASX XML file */
{
ExpatParser expat(&parser);
expat.SetElementHandler(asx_start_element, asx_end_element);
expat.SetCharacterDataHandler(asx_char_data);
GMarkupParseContext *context =
g_markup_parse_context_new(&asx_parser,
G_MARKUP_TREAT_CDATA_AS_TEXT,
&parser, nullptr);
while (true) {
char buffer[1024];
size_t nbytes = is.LockRead(buffer, sizeof(buffer), error2);
if (nbytes == 0) {
if (error2.IsDefined()) {
g_markup_parse_context_free(context);
LogError(error2);
Error error;
if (!expat.Parse(is, error)) {
LogError(error);
return nullptr;
}
break;
}
success = g_markup_parse_context_parse(context, buffer, nbytes,
&error);
if (!success) {
FormatErrno(asx_domain,
"XML parser failed: %s", error->message);
g_error_free(error);
g_markup_parse_context_free(context);
return nullptr;
}
}
success = g_markup_parse_context_end_parse(context, &error);
if (!success) {
FormatErrno(asx_domain,
"XML parser failed: %s", error->message);
g_error_free(error);
g_markup_parse_context_free(context);
return nullptr;
}
parser.songs.reverse();
MemorySongEnumerator *playlist =
new MemorySongEnumerator(std::move(parser.songs));
g_markup_parse_context_free(context);
return playlist;
return new MemorySongEnumerator(std::move(parser.songs));
}
static const char *const asx_suffixes[] = {

110
src/playlist/RssPlaylistPlugin.cxx
View File

@ -21,20 +21,13 @@
#include "RssPlaylistPlugin.hxx"
#include "PlaylistPlugin.hxx"
#include "MemorySongEnumerator.hxx"
#include "InputStream.hxx"
#include "Song.hxx"
#include "tag/TagBuilder.hxx"
#include "util/ASCII.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
#include "Expat.hxx"
#include "Log.hxx"
#include <glib.h>
#include <string.h>
static constexpr Domain rss_domain("rss");
/**
* This is the state object for the GLib XML parser.
*/
@ -71,23 +64,9 @@ struct RssParser {
:state(ROOT) {}
};
static const gchar *
get_attribute(const gchar **attribute_names, const gchar **attribute_values,
const gchar *name)
{
for (unsigned i = 0; attribute_names[i] != nullptr; ++i)
if (StringEqualsCaseASCII(attribute_names[i], name))
return attribute_values[i];
return nullptr;
}
static void
rss_start_element(gcc_unused GMarkupParseContext *context,
const gchar *element_name,
const gchar **attribute_names,
const gchar **attribute_values,
gpointer user_data, gcc_unused GError **error)
static void XMLCALL
rss_start_element(void *user_data, const XML_Char *element_name,
const XML_Char **atts)
{
RssParser *parser = (RssParser *)user_data;
@ -103,9 +82,8 @@ rss_start_element(gcc_unused GMarkupParseContext *context,
case RssParser::ITEM:
if (StringEqualsCaseASCII(element_name, "enclosure")) {
const gchar *href = get_attribute(attribute_names,
attribute_values,
"url");
const char *href =
ExpatParser::GetAttributeCase(atts, "url");
if (href != nullptr)
parser->location = href;
} else if (StringEqualsCaseASCII(element_name, "title"))
@ -117,10 +95,8 @@ rss_start_element(gcc_unused GMarkupParseContext *context,
}
}
static void
rss_end_element(gcc_unused GMarkupParseContext *context,
const gchar *element_name,
gpointer user_data, gcc_unused GError **error)
static void XMLCALL
rss_end_element(void *user_data, const XML_Char *element_name)
{
RssParser *parser = (RssParser *)user_data;
@ -142,10 +118,8 @@ rss_end_element(gcc_unused GMarkupParseContext *context,
}
}
static void
rss_text(gcc_unused GMarkupParseContext *context,
const gchar *text, gsize text_len,
gpointer user_data, gcc_unused GError **error)
static void XMLCALL
rss_char_data(void *user_data, const XML_Char *s, int len)
{
RssParser *parser = (RssParser *)user_data;
@ -155,21 +129,12 @@ rss_text(gcc_unused GMarkupParseContext *context,
case RssParser::ITEM:
if (parser->tag_type != TAG_NUM_OF_ITEM_TYPES)
parser->tag_builder.AddItem(parser->tag_type,
text, text_len);
parser->tag_builder.AddItem(parser->tag_type, s, len);
break;
}
}
static const GMarkupParser rss_parser = {
rss_start_element,
rss_end_element,
rss_text,
nullptr,
nullptr,
};
/*
* The playlist object
*
@ -179,58 +144,21 @@ static SongEnumerator *
rss_open_stream(InputStream &is)
{
RssParser parser;
GMarkupParseContext *context;
char buffer[1024];
size_t nbytes;
bool success;
Error error2;
GError *error = nullptr;
/* parse the RSS XML file */
{
ExpatParser expat(&parser);
expat.SetElementHandler(rss_start_element, rss_end_element);
expat.SetCharacterDataHandler(rss_char_data);
context = g_markup_parse_context_new(&rss_parser,
G_MARKUP_TREAT_CDATA_AS_TEXT,
&parser, nullptr);
while (true) {
nbytes = is.LockRead(buffer, sizeof(buffer), error2);
if (nbytes == 0) {
if (error2.IsDefined()) {
g_markup_parse_context_free(context);
LogError(error2);
Error error;
if (!expat.Parse(is, error)) {
LogError(error);
return nullptr;
}
break;
}
success = g_markup_parse_context_parse(context, buffer, nbytes,
&error);
if (!success) {
FormatError(rss_domain,
"XML parser failed: %s", error->message);
g_error_free(error);
g_markup_parse_context_free(context);
return nullptr;
}
}
success = g_markup_parse_context_end_parse(context, &error);
if (!success) {
FormatError(rss_domain,
"XML parser failed: %s", error->message);
g_error_free(error);
g_markup_parse_context_free(context);
return nullptr;
}
parser.songs.reverse();
MemorySongEnumerator *playlist =
new MemorySongEnumerator(std::move(parser.songs));
g_markup_parse_context_free(context);
return playlist;
return new MemorySongEnumerator(std::move(parser.songs));
}
static const char *const rss_suffixes[] = {

90
src/playlist/XspfPlaylistPlugin.cxx
View File

@ -26,10 +26,9 @@
#include "tag/TagBuilder.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
#include "Expat.hxx"
#include "Log.hxx"
#include <glib.h>
#include <string.h>
static constexpr Domain xspf_domain("xspf");
@ -70,12 +69,9 @@ struct XspfParser {
:state(ROOT) {}
};
static void
xspf_start_element(gcc_unused GMarkupParseContext *context,
const gchar *element_name,
gcc_unused const gchar **attribute_names,
gcc_unused const gchar **attribute_values,
gpointer user_data, gcc_unused GError **error)
static void XMLCALL
xspf_start_element(void *user_data, const XML_Char *element_name,
gcc_unused const XML_Char **atts)
{
XspfParser *parser = (XspfParser *)user_data;
@ -124,10 +120,8 @@ xspf_start_element(gcc_unused GMarkupParseContext *context,
}
}
static void
xspf_end_element(gcc_unused GMarkupParseContext *context,
const gchar *element_name,
gpointer user_data, gcc_unused GError **error)
static void XMLCALL
xspf_end_element(void *user_data, const XML_Char *element_name)
{
XspfParser *parser = (XspfParser *)user_data;
@ -165,10 +159,8 @@ xspf_end_element(gcc_unused GMarkupParseContext *context,
}
}
static void
xspf_text(gcc_unused GMarkupParseContext *context,
const gchar *text, gsize text_len,
gpointer user_data, gcc_unused GError **error)
static void XMLCALL
xspf_char_data(void *user_data, const XML_Char *s, int len)
{
XspfParser *parser = (XspfParser *)user_data;
@ -181,26 +173,17 @@ xspf_text(gcc_unused GMarkupParseContext *context,
case XspfParser::TRACK:
if (!parser->location.empty() &&
parser->tag_type != TAG_NUM_OF_ITEM_TYPES)
parser->tag_builder.AddItem(parser->tag_type,
text, text_len);
parser->tag_builder.AddItem(parser->tag_type, s, len);
break;
case XspfParser::LOCATION:
parser->location.assign(text, text_len);
parser->location.assign(s, len);
break;
}
}
static const GMarkupParser xspf_parser = {
xspf_start_element,
xspf_end_element,
xspf_text,
nullptr,
nullptr,
};
/*
* The playlist object
*
@ -210,58 +193,21 @@ static SongEnumerator *
xspf_open_stream(InputStream &is)
{
XspfParser parser;
GMarkupParseContext *context;
char buffer[1024];
size_t nbytes;
bool success;
Error error2;
GError *error = nullptr;
/* parse the XSPF XML file */
{
ExpatParser expat(&parser);
expat.SetElementHandler(xspf_start_element, xspf_end_element);
expat.SetCharacterDataHandler(xspf_char_data);
context = g_markup_parse_context_new(&xspf_parser,
G_MARKUP_TREAT_CDATA_AS_TEXT,
&parser, nullptr);
while (true) {
nbytes = is.LockRead(buffer, sizeof(buffer), error2);
if (nbytes == 0) {
if (error2.IsDefined()) {
g_markup_parse_context_free(context);
LogError(error2);
Error error;
if (!expat.Parse(is, error)) {
LogError(error);
return nullptr;
}
break;
}
success = g_markup_parse_context_parse(context, buffer, nbytes,
&error);
if (!success) {
FormatError(xspf_domain,
"XML parser failed: %s", error->message);
g_error_free(error);
g_markup_parse_context_free(context);
return nullptr;
}
}
success = g_markup_parse_context_end_parse(context, &error);
if (!success) {
FormatError(xspf_domain,
"XML parser failed: %s", error->message);
g_error_free(error);
g_markup_parse_context_free(context);
return nullptr;
}
parser.songs.reverse();
MemorySongEnumerator *playlist =
new MemorySongEnumerator(std::move(parser.songs));
g_markup_parse_context_free(context);
return playlist;
return new MemorySongEnumerator(std::move(parser.songs));
}
static const char *const xspf_suffixes[] = {