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#include "PasswordReader.h"
#include <iostream>
#include <fstream>
#include <algorithm>
#include "FWCore/Utilities/interface/Exception.h"
using namespace std;
void PasswordReader::readPassword(const std::string& fileName, const std::string& user, std::string& password) {
ifstream f(fileName.c_str());
if (!f.good()) {
throw cms::Exception("File") << "Failed to open file " << fileName
<< " for reading condition "
"database password\n";
}
string line;
bool found = false;
int nstatements = 0; //number of lines other than empty and comment lines
while (f.good() && !found) {
size_t pos = 0;
getline(f, line);
trim(line, " \t");
if (line[0] == '#' || line.empty()) { //comment line
continue;
}
++nstatements;
string u = tokenize(line, ":/ \t", pos);
if (u == user) { //user found
password = tokenize(line, ":/ \t", pos);
found = true;
}
}
if (!found && nstatements == 1) { //login not found in the file
//let's check if file does not contain a single password, w/o login
f.clear();
f.seekg(0, ios::beg);
getline(f, line);
trim(line, " \t");
if (line.find_first_of(": \t") == string::npos) { //no login/password delimiter
//looks like a single password file
password = line;
found = true;
}
}
if (!found) {
throw cms::Exception("Database") << " Password for condition database user '" << user << "' not found in"
<< " password file " << fileName << "\n";
}
}
std::string PasswordReader::tokenize(const string& s, const string& delim, size_t& pos) const {
size_t pos0 = pos;
size_t len = s.size();
//eats delimeters at beginning of the string
while (pos0 < s.size() && find(delim.begin(), delim.end(), s[pos0]) != delim.end()) {
++pos0;
}
if (pos0 >= len || pos0 == string::npos)
return "";
pos = s.find_first_of(delim, pos0);
return s.substr(pos0, (pos > 0 ? pos : s.size()) - pos0);
}
std::string PasswordReader::trim(const std::string& s, const std::string& chars) const {
std::string::size_type pos0 = s.find_first_not_of(chars);
if (pos0 == std::string::npos) {
pos0 = 0;
}
string::size_type pos1 = s.find_last_not_of(chars) + 1;
if (pos1 == std::string::npos) {
pos1 = pos0;
}
return s.substr(pos0, pos1 - pos0);
}
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