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protocolinfo.cxx    164 lines (145 with data), 4.3 kB

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/* Copyright (C) 2016 J.F.Dockes
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "protocolinfo.hxx"
#include "libupnpp/log.hxx"
#include "libupnpp/upnpavutils.hxx"
#include "main.hxx"
#include "smallut.h"
#include "pathut.h"
#include "upmpdutils.hxx"
#include <string>
#include <stdlib.h>
#include <time.h>
#include <sys/stat.h>
using namespace std;
class Protocolinfo::Internal {
public:
string prototext;
unordered_set<string> supportedformats;
bool ok{false};
time_t mtime{0};
int64_t sz{0};
bool maybeUpdate();
};
static Protocolinfo *theProto;
Protocolinfo *Protocolinfo::the()
{
if (theProto == 0)
theProto = new Protocolinfo();
if (theProto && !theProto->ok()) {
delete theProto;
theProto = 0;
return 0;
}
return theProto;
}
Protocolinfo::Protocolinfo()
{
m = new Internal();
if (!m) {
LOGFAT("Protocolinfo: out of mem\n");
abort();
}
m->maybeUpdate();
}
bool Protocolinfo::ok()
{
return m && m->ok;
}
const string& Protocolinfo::gettext()
{
m->maybeUpdate();
return m->prototext;
}
const std::unordered_set<std::string>& Protocolinfo::getsupportedformats()
{
m->maybeUpdate();
return m->supportedformats;
}
/**
* Read protocol info file. This contains the connection manager
* protocol info data
*
* We strip white-space from beginning/ends of lines, and allow
* #-started comments (on a line alone only, comments after data not allowed).
*/
static bool read_protocolinfo(const string& fn, bool enableL16, string& out)
{
LOGDEB1("read_protocolinfo: fn " << fn << "\n");
out.clear();
ifstream input;
input.open(fn, ios::in);
if (!input.is_open()) {
LOGERR("read_protocolinfo: open failed: " << fn << "\n");
return false;
}
bool eof = false;
for (;;) {
string line;
getline(input, line);
if (!input.good()) {
if (input.bad()) {
LOGERR("read_protocolinfo: read error: " << fn << "\n");
return false;
}
// Must be eof ? But maybe we have a partial line which
// must be processed. This happens if the last line before
// eof ends with a backslash, or there is no final \n
eof = true;
}
trimstring(line, " \t\n\r,");
if (!line.empty()) {
if (enableL16 && line[0] == '@') {
line = regsub1("@ENABLEL16@", line, "");
} else {
line = regsub1("@ENABLEL16@", line, "#");
}
if (line[0] == '#')
continue;
out += line + ',';
}
if (eof)
break;
}
trimstring(out, ",");
LOGDEB0("read_protocolinfo data: [" << out << "]\n");
return true;
}
bool Protocolinfo::Internal::maybeUpdate()
{
string protofile(path_cat(g_datadir, "protocolinfo.txt"));
struct stat st;
if (::stat(protofile.c_str(), &st) != 0) {
LOGFAT("protocolinfo: stat() failed for " << protofile << endl);
return ok=false;
}
if (mtime == st.st_mtime && sz == st.st_size) {
return true;
}
if (!read_protocolinfo(protofile, g_enableL16, prototext)) {
LOGFAT("Failed reading protocol info from " << protofile << endl);
return ok=false;
}
vector<UPnPP::ProtocolinfoEntry> vpe;
parseProtocolInfo(prototext, vpe);
for (const auto& it : vpe) {
supportedformats.insert(it.contentFormat);
}
mtime = st.st_mtime;
sz = st.st_size;
return ok=true;
}