void plugin_server::load_service_config(const std::string& config_name)
{
std::string config_file;
if (! plugin::find_config_file(config_file, config_name))
BOOST_THROW_EXCEPTION( error::file_not_found() << error::errinfo_file_name(config_name) );
// open the file for reading
std::ifstream config_stream;
config_stream.open(config_file.c_str(), std::ios::in);
if (! config_stream.is_open())
BOOST_THROW_EXCEPTION( error::open_file() << error::errinfo_file_name(config_name) );
// parse the contents of the file
http::auth_ptr my_auth_ptr;
enum ParseState {
PARSE_NEWLINE, PARSE_COMMAND, PARSE_RESOURCE, PARSE_VALUE, PARSE_COMMENT, PARSE_USERNAME
} parse_state = PARSE_NEWLINE;
std::string command_string;
std::string resource_string;
std::string username_string;
std::string value_string;
std::string option_name_string;
std::string option_value_string;
int c = config_stream.get(); // read the first character
while (config_stream) {
switch(parse_state) {
case PARSE_NEWLINE:
// parsing command portion (or beginning of line)
if (c == '#') {
// line is a comment
parse_state = PARSE_COMMENT;
} else if (isalpha(c)) {
// first char in command
parse_state = PARSE_COMMAND;
// ignore case for commands
command_string += tolower(c);
} else if (c != '\r' && c != '\n') { // check for blank lines
BOOST_THROW_EXCEPTION( error::bad_config() << error::errinfo_file_name(config_name) );
}
break;
case PARSE_COMMAND:
// parsing command portion (or beginning of line)
if (c == ' ' || c == '\t') {
// command finished -> check if valid
if (command_string=="path" || command_string=="auth" || command_string=="restrict") {
value_string.clear();
parse_state = PARSE_VALUE;
} else if (command_string=="service" || command_string=="option") {
resource_string.clear();
parse_state = PARSE_RESOURCE;
} else if (command_string=="user") {
username_string.clear();
parse_state = PARSE_USERNAME;
} else {
BOOST_THROW_EXCEPTION( error::bad_config() << error::errinfo_file_name(config_name) );
}
} else if (! isalpha(c)) {
// commands may only contain alpha chars
BOOST_THROW_EXCEPTION( error::bad_config() << error::errinfo_file_name(config_name) );
} else {
// ignore case for commands
command_string += tolower(c);
}
break;
case PARSE_RESOURCE:
// parsing resource portion (/hello)
if (c == ' ' || c == '\t') {
// check for leading whitespace
if (! resource_string.empty()) {
// resource finished
value_string.clear();
parse_state = PARSE_VALUE;
}
} else if (c == '\r' || c == '\n') {
// line truncated before value
BOOST_THROW_EXCEPTION( error::bad_config() << error::errinfo_file_name(config_name) );
} else {
// add char to resource
resource_string += c;
}
break;
case PARSE_USERNAME:
// parsing username for user command
if (c == ' ' || c == '\t') {
// check for leading whitespace
if (! username_string.empty()) {
// username finished
value_string.clear();
parse_state = PARSE_VALUE;
}
} else if (c == '\r' || c == '\n') {
// line truncated before value (missing username)
BOOST_THROW_EXCEPTION( error::bad_config() << error::errinfo_file_name(config_name) );
} else {
// add char to username
username_string += c;
}
break;
case PARSE_VALUE:
// parsing value portion
if (c == '\r' || c == '\n') {
// value is finished
if (value_string.empty()) {
// value must not be empty
BOOST_THROW_EXCEPTION( error::bad_config() << error::errinfo_file_name(config_name) );
} else if (command_string == "path") {
// finished path command
try { plugin::add_plugin_directory(value_string); }
catch (std::exception& e) {
PION_LOG_WARN(m_logger, boost::diagnostic_information(e));
}
} else if (command_string == "auth") {
// finished auth command
user_manager_ptr user_mgr(new user_manager);
if (value_string == "basic"){
my_auth_ptr.reset(new http::basic_auth(user_mgr));
}
else if (value_string == "cookie"){
my_auth_ptr.reset(new http::cookie_auth(user_mgr));
}
else {
// only basic and cookie authentications are supported
BOOST_THROW_EXCEPTION( error::bad_config() << error::errinfo_file_name(config_name) );
}
} else if (command_string == "restrict") {
// finished restrict command
if (! my_auth_ptr)
// Authentication type must be defined before restrict
BOOST_THROW_EXCEPTION( error::bad_config() << error::errinfo_file_name(config_name) );
else if (value_string.empty())
// No service defined for restrict parameter
BOOST_THROW_EXCEPTION( error::bad_config() << error::errinfo_file_name(config_name) );
my_auth_ptr->add_restrict(value_string);
} else if (command_string == "user") {
// finished user command
if (! my_auth_ptr)
// Authentication type must be defined before users
BOOST_THROW_EXCEPTION( error::bad_config() << error::errinfo_file_name(config_name) );
else if (value_string.empty())
// No password defined for user parameter
BOOST_THROW_EXCEPTION( error::bad_config() << error::errinfo_file_name(config_name) );
my_auth_ptr->add_user(username_string, value_string);
} else if (command_string == "service") {
// finished service command
load_service(resource_string, value_string);
} else if (command_string == "option") {
// finished option command
std::string::size_type pos = value_string.find('=');
if (pos == std::string::npos)
BOOST_THROW_EXCEPTION( error::bad_config() << error::errinfo_file_name(config_name) );
option_name_string = value_string.substr(0, pos);
option_value_string = value_string.substr(pos + 1);
set_service_option(resource_string, option_name_string,
option_value_string);
}
command_string.clear();
parse_state = PARSE_NEWLINE;
} else if (c == ' ' || c == '\t') {
// only skip leading whitespace (value may contain spaces, etc)
if (! value_string.empty())
value_string += c;
} else {
// add char to value
value_string += c;
}
break;
case PARSE_COMMENT:
// skipping comment line
if (c == '\r' || c == '\n')
parse_state = PARSE_NEWLINE;
break;
}
// read the next character
c = config_stream.get();
}
// update authentication configuration for the server
set_authentication(my_auth_ptr);
}
void HTTPServer::handleRequest(HTTPRequestPtr& http_request,
TCPConnectionPtr& tcp_conn)
{
if (! http_request->isValid()) {
// the request is invalid or an error occured
PION_LOG_INFO(m_logger, "Received an invalid HTTP request");
m_bad_request_handler(http_request, tcp_conn);
return;
}
PION_LOG_DEBUG(m_logger, "Received a valid HTTP request");
// strip off trailing slash if the request has one
std::string resource_requested(stripTrailingSlash(http_request->getResource()));
// apply any redirection
RedirectMap::const_iterator it = m_redirects.find(resource_requested);
unsigned int num_redirects = 0;
while (it != m_redirects.end()) {
if (++num_redirects > MAX_REDIRECTS) {
PION_LOG_ERROR(m_logger, "Maximum number of redirects (HTTPServer::MAX_REDIRECTS) exceeded for requested resource: " << http_request->getOriginalResource());
m_server_error_handler(http_request, tcp_conn, "Maximum number of redirects (HTTPServer::MAX_REDIRECTS) exceeded for requested resource");
return;
}
resource_requested = it->second;
http_request->changeResource(resource_requested);
it = m_redirects.find(resource_requested);
}
// if authentication activated, check current request
if (m_auth) {
// try to verify authentication
if (! m_auth->handleRequest(http_request, tcp_conn)) {
// the HTTP 401 message has already been sent by the authentication object
PION_LOG_DEBUG(m_logger, "Authentication required for HTTP resource: "
<< resource_requested);
if (http_request->getResource() != http_request->getOriginalResource()) {
PION_LOG_DEBUG(m_logger, "Original resource requested was: " << http_request->getOriginalResource());
}
return;
}
}
// search for a handler matching the resource requested
RequestHandler request_handler;
if (findRequestHandler(resource_requested, request_handler)) {
// try to handle the request
try {
request_handler(http_request, tcp_conn);
PION_LOG_DEBUG(m_logger, "Found request handler for HTTP resource: "
<< resource_requested);
if (http_request->getResource() != http_request->getOriginalResource()) {
PION_LOG_DEBUG(m_logger, "Original resource requested was: " << http_request->getOriginalResource());
}
} catch (HTTPResponseWriter::LostConnectionException& e) {
// the connection was lost while or before sending the response
PION_LOG_WARN(m_logger, "HTTP request handler: " << e.what());
tcp_conn->setLifecycle(TCPConnection::LIFECYCLE_CLOSE); // make sure it will get closed
tcp_conn->finish();
} catch (std::bad_alloc&) {
// propagate memory errors (FATAL)
throw;
} catch (std::exception& e) {
// recover gracefully from other exceptions thrown request handlers
PION_LOG_ERROR(m_logger, "HTTP request handler: " << e.what());
m_server_error_handler(http_request, tcp_conn, e.what());
}
} else {
// no web services found that could handle the request
PION_LOG_INFO(m_logger, "No HTTP request handlers found for resource: "
<< resource_requested);
if (http_request->getResource() != http_request->getOriginalResource()) {
PION_LOG_DEBUG(m_logger, "Original resource requested was: " << http_request->getOriginalResource());
}
m_not_found_handler(http_request, tcp_conn);
}
}
