LastfmService::Result LastfmService::fetch(Args &args)
{
Result result;
std::string url = baseURL;
url += methodName();
for (Args::const_iterator it = args.begin(); it != args.end(); ++it)
{
url += "&";
url += it->first;
url += "=";
url += Curl::escape(it->second);
}
std::string data;
CURLcode code = Curl::perform(data, url);
if (code != CURLE_OK)
{
result.second = curl_easy_strerror(code);
return result;
}
if (actionFailed(data))
{
StripHtmlTags(data);
result.second = data;
return result;
}
if (!parse(data))
{
// if relevant part of data was not found and one of arguments
// was language, try to fetch it again without that parameter.
// otherwise just report failure.
Args::iterator lang = args.find("lang");
if (lang != args.end())
{
args.erase(lang);
return fetch(args);
}
else
{
// parse should change data to error msg, if it fails
result.second = data;
return result;
}
}
result.first = true;
result.second = data;
return result;
}
void ForkedBroker::init(const Args& userArgs) {
using qpid::ErrnoException;
port = 0;
int pipeFds[2];
if(::pipe(pipeFds) < 0) throw ErrnoException("Can't create pipe");
// Ignore the SIGCHLD signal generated by an exitting child
// We will clean up any exitting children in the waitpid above
// This should really be neater (like only once not per fork)
struct ::sigaction sa;
sa.sa_handler = ignore_signal;
::sigemptyset(&sa.sa_mask);
::sigaddset(&sa.sa_mask, SIGCHLD);
sa.sa_flags = SA_NOCLDSTOP | SA_RESTART;
::sigaction(SIGCHLD, &sa, 0);
pid = ::fork();
if (pid < 0) throw ErrnoException("Fork failed");
if (pid) { // parent
::close(pipeFds[1]);
FILE* f = ::fdopen(pipeFds[0], "r");
if (!f) throw ErrnoException("fopen failed");
if (::fscanf(f, "%d", &port) != 1) {
if (ferror(f)) throw ErrnoException("Error reading port number from child.");
else throw qpid::Exception("EOF reading port number from child.");
}
::fclose(f);
running = true;
}
else { // child
::close(pipeFds[0]);
int fd = ::dup2(pipeFds[1], 1); // pipe stdout to the parent.
if (fd < 0) throw ErrnoException("dup2 failed");
const char* prog = ::getenv("QPIDD_EXEC");
if (!prog) prog = "../qpidd"; // This only works from within svn checkout
Args args(userArgs);
args.push_back("--port=0");
// Keep quiet except for errors.
if (!::getenv("QPID_TRACE") && !::getenv("QPID_LOG_ENABLE")
&& find_if(userArgs.begin(), userArgs.end(), isLogOption) == userArgs.end())
args.push_back("--log-enable=error+");
std::vector<const char*> argv(args.size());
std::transform(args.begin(), args.end(), argv.begin(), boost::bind(&std::string::c_str, _1));
argv.push_back(0);
QPID_LOG(debug, "ForkedBroker exec " << prog << ": " << args);
execv(prog, const_cast<char* const*>(&argv[0]));
QPID_LOG(critical, "execv failed to start broker: prog=\"" << prog << "\"; args=\"" << args << "\"; errno=" << errno << " (" << std::strerror(errno) << ")");
::exit(1);
}
}
std::string ArgsParser::selectStatement( const Args& selection ) const
{
std::vector<bool> found( margs.size(), false );
for ( Args::const_iterator o = selection.begin();
o != selection.end(); ++o )
{
for ( uint i = 0; i < margs.size(); ++i )
{
if ( (*o)->inherits( margs[i].type ) && !found[i] )
{
// object o is of a type that we're looking for
found[i] = true;
break;
}
}
}
for ( uint i = 0; i < margs.size(); ++i )
{
if ( !found[i] )
return margs[i].selectstat;
}
kdDebug() << k_funcinfo << "no proper select statement found :(" << endl;
return 0;
}
ArgsParser::spec ArgsParser::findSpec( const ObjectImp* obj, const Args& parents ) const
{
spec ret;
ret.type = 0;
std::vector<bool> found( margs.size(), false );
for ( Args::const_iterator o = parents.begin();
o != parents.end(); ++o )
{
for ( uint i = 0; i < margs.size(); ++i )
{
if ( (*o)->inherits( margs[i].type ) && !found[i] )
{
// object o is of a type that we're looking for
found[i] = true;
if ( *o == obj ) return margs[i];
// i know that "goto's are *evil*", but they're very useful
// and completely harmless if you use them as better "break;"
// statements.. trust me ;)
goto matched;
};
};
matched:
;
};
kdDebug() << k_funcinfo << "no proper spec found :(" << endl;
return ret;
}
void FlagImpl<std::string>::Parse( Args & args )
{
for( Args::iterator arg = args.begin(); arg != args.end(); ++arg )
{
if( !arg->compare( GetFlag() ))
{
if( IsAlreadySet() ) // если флаг задан( уже встречалс¤ среди переданных аргументов )
throw exception::ErrBadArgs();
Args::iterator flag = arg; // первый аргумент - флаг
Args::iterator opt = ++arg; // следущий за ним аргумент - опци¤
if( opt == args.end() )
throw exception::ErrBadArgs();
SetVal( *opt );
SetIsAlreadySet(); // выставл¤ем признак того, что данный флаг уже задан( защита от дублировани¤ )
// удал¤ем из списка аргументов считанные флаг и опцию
args.erase( flag );
args.erase( opt );
break;
}
}
}
void ForkedBroker::init(const Args& userArgs) {
using qpid::ErrnoException;
port = 0;
int pipeFds[2];
if(::pipe(pipeFds) < 0) throw ErrnoException("Can't create pipe");
pid = ::fork();
if (pid < 0) throw ErrnoException("Fork failed");
if (pid) { // parent
::close(pipeFds[1]);
FILE* f = ::fdopen(pipeFds[0], "r");
if (!f) throw ErrnoException("fopen failed");
if (::fscanf(f, "%d", &port) != 1) {
if (ferror(f)) throw ErrnoException("Error reading port number from child.");
else throw qpid::Exception("EOF reading port number from child.");
}
::close(pipeFds[0]);
}
else { // child
::close(pipeFds[0]);
int fd = ::dup2(pipeFds[1], 1); // pipe stdout to the parent.
if (fd < 0) throw ErrnoException("dup2 failed");
const char* prog = ::getenv("QPIDD_EXEC");
if (!prog) prog = "../qpidd"; // This only works from within svn checkout
Args args(userArgs);
args.push_back("--port=0");
// Keep quiet except for errors.
if (!::getenv("QPID_TRACE") && !::getenv("QPID_LOG_ENABLE")
&& find_if(userArgs.begin(), userArgs.end(), isLogOption) == userArgs.end())
args.push_back("--log-enable=error+");
std::vector<const char*> argv(args.size());
std::transform(args.begin(), args.end(), argv.begin(), boost::bind(&std::string::c_str, _1));
argv.push_back(0);
QPID_LOG(debug, "ForkedBroker exec " << prog << ": " << args);
execv(prog, const_cast<char* const*>(&argv[0]));
QPID_LOG(critical, "execv failed to start broker: prog=\"" << prog << "\"; args=\"" << args << "\"; errno=" << errno << " (" << std::strerror(errno) << ")");
::exit(1);
}
}
void FlagImpl<bool>::Parse( Args & args )
{
for( Args::iterator arg = args.begin(); arg != args.end(); ++arg )
{
if( !arg->compare( GetFlag() ))
{
if( IsAlreadySet() ) // если флаг задан( уже встречалс¤ среди переданных аргументов )
throw exception::ErrBadArgs();
// аргумент, ¤вл¤ющийс¤ булевым флагом, не предполагает следующей за ним опции
SetVal( true );
SetIsAlreadySet(); // выставл¤ем признак того, что данный флаг уже задан( защита от дублировани¤ )
// удал¤ем из списка аргументов считанный флаг
args.erase( arg );
break;
}
}
}
//static
ProcessHandlePtr Process::launch(const std::string& command, const Args& args,
const EnvMap& envVariables,
const std::string& sWorkDir)
{
if (!sWorkDir.empty())
{
File f(sWorkDir);
if (!f.createDirectories())
{
FIRTEX_THROW(SystemException, "Cannot create work "
"directory for: [%s]", command.c_str());
}
}
int pid = fork();
if (pid < 0)
{
FIRTEX_THROW(SystemException, "Cannot fork process for: [%s]",
command.c_str());
}
//fill arguments
char** argv = new char*[args.size() + 2];
int i = 0;
argv[i++] = const_cast<char*>(command.c_str());
for (Args::const_iterator it = args.begin(); it != args.end(); ++it)
{
argv[i++] = const_cast<char*>(it->c_str());
}
argv[i] = NULL;
if (pid == 0) //the child process
{
for (EnvMap::const_iterator it = envVariables.begin();
it != envVariables.end(); ++it)
{
Environment::set(it->first, it->second);
}
if (!sWorkDir.empty())
{
if (chdir(sWorkDir.c_str()) == -1)
{
FIRTEX_THROW(RuntimeException, "chdir(%s) FAILED",
sWorkDir.c_str());
}
}
// close all open file descriptors other than stdin, stdout, stderr
for (int i = 3; i < getdtablesize(); ++i)
{
close(i);
}
stringstream ss;
ss << "." << getpid();
Path path(sWorkDir);
path.makeDirectory();
path.setFileName(STDOUT_FILE_NAME + ss.str());
if (freopen(path.toString().c_str(), "w+", stdout) == NULL)
{
FX_LOG(ERROR, "Reopen [%s] FAILED", path.toString().c_str());
}
path.setFileName(STDERR_FILE_NAME + ss.str());
if (freopen(path.toString().c_str(), "w+", stderr) == NULL)
{
FX_LOG(ERROR, "Reopen [%s] FAILED", path.toString().c_str());
}
execvp(command.c_str(), argv);
fprintf(stderr, "command: [%s] execvp FAILED, error code: %d(%s)",
command.c_str(), errno, strerror(errno));
fflush(stderr);
_exit(72);
}
else
{
delete[] argv;
//parent process
return ProcessHandlePtr(new ProcessHandle(pid));
}
//never get here
return ProcessHandlePtr();
}
bool ArtistInfo::checkArgs(const Args &args)
{
return args.find("artist") != args.end();
}