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/*
* fPls - playlist handler for fIcy
* Copyright(c) 2004-2017 of wave++ (Yuri D'Elia) <wavexx@thregr.org>
* Distributed under GNU LGPL without ANY warranty.
*/
// local headers
#include "fIcy.hh"
#include "msg.hh"
#include "htfollow.hh"
#include "plsparse.hh"
#include "tmparse.hh"
#include "authparse.hh"
using std::string;
using std::list;
using std::map;
// system headers
#include <fstream>
using std::ifstream;
#include <sstream>
using std::istringstream;
#include <iostream>
using std::cout;
#include <memory>
using std::auto_ptr;
#include <stdexcept>
using std::runtime_error;
// c system headers
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
#include <time.h>
#include <errno.h>
#include <fcntl.h>
/*
* Parameters handling
*/
class Params
{
public:
explicit
Params(int argc, char* argv[]);
~Params() throw()
{
if(fIcyParams)
delete[] fIcyParams;
}
const char* uri;
const char** fIcyParams;
size_t urlPos;
size_t timePos;
size_t maxRetries;
long maxLoops;
time_t waitSecs;
time_t maxTime;
time_t idleTime;
size_t maxFollow;
char* daemonize;
char* auth;
Http::Auth authData;
bool help;
};
Params::Params(int argc, char* argv[])
{
// defaults
prg = argv[0];
maxRetries = fIcy::maxRetries;
maxLoops = fIcy::maxLoops;
waitSecs = fIcy::waitSecs;
maxTime = 0;
maxFollow = fIcy::maxFollow;
idleTime = 0;
verbose = help = false;
daemonize = NULL;
auth = NULL;
// locals
const char* path = "fIcy";
const char* maxFollowBuf = NULL;
const char* idleTimeBuf = NULL;
int arg;
// let's again put a bit of SHAME... those FSC**BEEP GNU extensions.
// WHY _NOT_ BEING POSIXLY_CORRECT BY DEFAULT EH? oooh, "features"! I see.
while((arg = getopt(argc, argv, "+P:R:L:T:M:l:d:a:vhi:")) != -1)
switch(arg)
{
case 'P':
path = optarg;
break;
case 'R':
maxRetries = strtoul(optarg, NULL, 0);
break;
case 'L':
maxLoops = strtol(optarg, NULL, 0);
break;
case 'T':
waitSecs = tmParse(optarg);
break;
case 'M':
maxTime = tmParse(optarg);
break;
case 'l':
maxFollowBuf = optarg;
maxFollow = strtol(optarg, NULL, 0);
break;
case 'd':
daemonize = optarg;
break;
case 'h':
help = true;
break;
case 'a':
auth = optarg;
break;
case 'v':
verbose = true;
break;
case 'i':
idleTimeBuf = optarg;
idleTime = tmParse(optarg);
break;
}
// fetch authentication tokens immediately to avoid further requests
if(auth)
authParse(authData, auth);
// playlist
argc -= optind;
uri = argv[optind++];
// fIcy parameters
if(--argc >= 0)
{
fIcyParams = new const char*[argc + 13];
fIcyParams[0] = path;
arg = 1;
// parameters we allow to override
if(auth)
{
fIcyParams[arg++] = "-a";
fIcyParams[arg++] = auth;
}
if(maxFollowBuf)
{
fIcyParams[arg++] = "-l";
fIcyParams[arg++] = maxFollowBuf;
}
if(idleTimeBuf)
{
fIcyParams[arg++] = "-i";
fIcyParams[arg++] = idleTimeBuf;
}
// forward other parameters
for(int i = 1; i <= argc; ++i)
fIcyParams[arg++] = argv[optind++];
// imposed parameters
fIcyParams[arg++] = "-M";
timePos = arg++;
if(daemonize)
fIcyParams[arg++] = "-d";
fIcyParams[arg++] = "--";
urlPos = arg++;
fIcyParams[arg++] = NULL;
}
else
fIcyParams = NULL;
}
void
show_help()
{
cout << prg << fIcy::fPlsHelp << prg << " v" << fIcy::version <<
" is\n" << fIcy::copyright;
}
void
load_file(string& out, const char* file)
{
ifstream in(file);
if(!in)
throw runtime_error(string("cannot open ") + file);
// load the file
char buf[fIcy::bufSz];
do
{
in.read(buf, sizeof(buf));
out.append(buf, in.gcount());
}
while(in);
if(!in.eof())
throw runtime_error(string("errors while reading from ") + file);
}
void
load_url(string& out, const URL& url, const Params& params)
{
// setup headers
Http::Header qHeaders;
qHeaders.push_back(fIcy::userAgent);
if(params.auth)
qHeaders.push_back(params.authData.basicHeader());
// connection
map<string, string> pReply;
auto_ptr<Socket> s(htFollow(pReply, url, qHeaders,
params.maxFollow, params.idleTime,
params.maxRetries, params.waitSecs));
// load the file
char buf[fIcy::bufSz];
size_t ret;
while((ret = s->read(buf, sizeof(buf))) > 0)
out.append(buf, ret);
}
void
load_list(string& buf, const char* uri, const Params& params)
{
URL url(uri);
if(url.proto == Http::Proto::proto)
load_url(buf, url, params);
else if(!url.proto.size())
{
msg("loading playlist from %s", uri);
load_file(buf, uri);
}
else
throw runtime_error(string("unknown protocol ") + url.proto);
}
// exec fIcy and return the exit code
int
exec_fIcy(Params& params, const time_t maxTime, const char* stream)
{
const char** args = params.fIcyParams;
char buf[16];
snprintf(buf, sizeof(buf), "%lu", maxTime);
args[params.timePos] = buf;
args[params.urlPos] = stream;
int ret;
switch(fork())
{
case -1:
err("cannot fork");
return Exit::args;
case 0:
execvp(args[0], const_cast<char**>(args));
err("cannot exec fIcy: %s", strerror(errno));
exit(Exit::args);
}
wait(&ret);
return (WIFEXITED(ret)? WEXITSTATUS(ret): Exit::args);
}
void
daemonize(const char* logFile)
{
int fd;
// ensure correctness before daemonization
if(logFile)
if((fd = open(logFile, O_WRONLY | O_APPEND | O_CREAT, 0666)) == -1)
throw runtime_error((string("cannot open log file ") + logFile).c_str());
// daemonize
#ifdef __sgi
if(_daemonize(0, fd, -1, -1) == -1)
#else
if(daemon(0, 0) == -1)
#endif
throw runtime_error("cannot daemonize process");
// fix stderr
if(logFile)
dup2(fd, STDERR_FILENO);
}
int
main(int argc, char* argv[]) try
{
// initialize
Params params(argc, argv);
if(!params.uri && !params.help)
{
err("bad parameters; see %s -h", prg);
return Exit::args;
}
if(params.help)
{
show_help();
return Exit::args;
}
time_t start(time(NULL));
time_t resTime(params.maxTime);
// fetch and parse the playlist
list<string> playlist;
{
string buf;
load_list(buf, params.uri, params);
istringstream stream(buf);
plsParse(playlist, stream);
}
msg("loaded %d elements", playlist.size());
// daemonize now if requested
if(params.daemonize)
daemonize(params.daemonize);
// main loop
for(size_t loop = 0; static_cast<long>(loop) != params.maxLoops; ++loop)
{
for(list<string>::const_iterator it = playlist.begin();
it != playlist.end(); ++it)
{
for(size_t retry = 0; retry != params.maxRetries; ++retry)
{
// sweet dreams on temporary failures
if(loop || retry || it != playlist.begin())
sleep(params.waitSecs);
// residual playing time
if(params.maxTime)
{
time_t d(time(NULL) - start);
if(d >= params.maxTime)
return Exit::success;
resTime = params.maxTime - d;
}
msg("stream %s: retry %d of loop %d", it->c_str(), retry + 1, loop + 1);
int ret = exec_fIcy(params, resTime, it->c_str());
if(ret == Exit::args)
return Exit::fail;
// check for success after maxTime
if(ret == Exit::success)
break;
}
}
}
return Exit::success;
}
catch(runtime_error& err)
{
::err("%s", err.what());
return Exit::fail;
}
catch(...)
{
err("unknown error, aborting");
abort();
}