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/*
* Copyright 2003-2016 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.
*/
#define __STDC_FORMAT_MACROS /* for PRIu64 */
#include "config.h"
#include "FileCommands.hxx"
#include "Request.hxx"
#include "CommandError.hxx"
#include "protocol/Ack.hxx"
#include "client/Client.hxx"
#include "client/Response.hxx"
#include "util/CharUtil.hxx"
#include "util/UriUtil.hxx"
#include "util/Error.hxx"
#include "tag/TagHandler.hxx"
#include "tag/Generic.hxx"
#include "TagStream.hxx"
#include "TagFile.hxx"
#include "storage/StorageInterface.hxx"
#include "fs/AllocatedPath.hxx"
#include "fs/FileInfo.hxx"
#include "fs/DirectoryReader.hxx"
#include "LocateUri.hxx"
#include "TimePrint.hxx"
#include <assert.h>
#include <inttypes.h> /* for PRIu64 */
gcc_pure
static bool
SkipNameFS(PathTraitsFS::const_pointer_type name_fs)
{
return name_fs[0] == '.' &&
(name_fs[1] == 0 ||
(name_fs[1] == '.' && name_fs[2] == 0));
}
gcc_pure
static bool
skip_path(Path name_fs)
{
return name_fs.HasNewline();
}
#if defined(WIN32) && GCC_CHECK_VERSION(4,6)
/* PRIu64 causes bogus compiler warning */
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat"
#pragma GCC diagnostic ignored "-Wformat-extra-args"
#endif
CommandResult
handle_listfiles_local(Response &r, Path path_fs)
{
DirectoryReader reader(path_fs);
while (reader.ReadEntry()) {
const Path name_fs = reader.GetEntry();
if (SkipNameFS(name_fs.c_str()) || skip_path(name_fs))
continue;
std::string name_utf8 = name_fs.ToUTF8();
if (name_utf8.empty())
continue;
const AllocatedPath full_fs =
AllocatedPath::Build(path_fs, name_fs);
FileInfo fi;
if (!GetFileInfo(full_fs, fi, false))
continue;
if (fi.IsRegular())
r.Format("file: %s\n"
"size: %" PRIu64 "\n",
name_utf8.c_str(),
fi.GetSize());
else if (fi.IsDirectory())
r.Format("directory: %s\n", name_utf8.c_str());
else
continue;
time_print(r, "Last-Modified", fi.GetModificationTime());
}
return CommandResult::OK;
}
#if defined(WIN32) && GCC_CHECK_VERSION(4,6)
#pragma GCC diagnostic pop
#endif
gcc_pure
static bool
IsValidName(const char *p)
{
if (!IsAlphaASCII(*p))
return false;
while (*++p) {
const char ch = *p;
if (!IsAlphaASCII(ch) && ch != '_' && ch != '-')
return false;
}
return true;
}
gcc_pure
static bool
IsValidValue(const char *p)
{
while (*p) {
const char ch = *p++;
if ((unsigned char)ch < 0x20)
return false;
}
return true;
}
static void
print_pair(const char *key, const char *value, void *ctx)
{
auto &r = *(Response *)ctx;
if (IsValidName(key) && IsValidValue(value))
r.Format("%s: %s\n", key, value);
}
static constexpr TagHandler print_comment_handler = {
nullptr,
nullptr,
print_pair,
};
static CommandResult
read_stream_comments(Response &r, const char *uri)
{
if (!tag_stream_scan(uri, print_comment_handler, &r)) {
r.Error(ACK_ERROR_NO_EXIST, "Failed to load file");
return CommandResult::ERROR;
}
return CommandResult::OK;
}
static CommandResult
read_file_comments(Response &r, const Path path_fs)
{
if (!tag_file_scan(path_fs, print_comment_handler, &r)) {
r.Error(ACK_ERROR_NO_EXIST, "Failed to load file");
return CommandResult::ERROR;
}
ScanGenericTags(path_fs, print_comment_handler, &r);
return CommandResult::OK;
}
static CommandResult
read_db_comments(Client &client, Response &r, const char *uri)
{
#ifdef ENABLE_DATABASE
const Storage *storage = client.GetStorage();
if (storage == nullptr) {
#else
(void)client;
(void)uri;
#endif
r.Error(ACK_ERROR_NO_EXIST, "No database");
return CommandResult::ERROR;
#ifdef ENABLE_DATABASE
}
{
AllocatedPath path_fs = storage->MapFS(uri);
if (!path_fs.IsNull())
return read_file_comments(r, path_fs);
}
{
const std::string uri2 = storage->MapUTF8(uri);
if (uri_has_scheme(uri2.c_str()))
return read_stream_comments(r, uri2.c_str());
}
r.Error(ACK_ERROR_NO_EXIST, "No such file");
return CommandResult::ERROR;
#endif
}
CommandResult
handle_read_comments(Client &client, Request args, Response &r)
{
assert(args.size == 1);
const char *const uri = args.front();
const auto located_uri = LocateUri(uri, &client
#ifdef ENABLE_DATABASE
, nullptr
#endif
);
switch (located_uri.type) {
case LocatedUri::Type::ABSOLUTE:
return read_stream_comments(r, located_uri.canonical_uri);
case LocatedUri::Type::RELATIVE:
return read_db_comments(client, r, located_uri.canonical_uri);
case LocatedUri::Type::PATH:
return read_file_comments(r, located_uri.path);
}
gcc_unreachable();
}
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