C++ value::get方法代码示例

 // sets checkboxes by bit mask 
 inline void set_checkbox_bits(dom::element& el, const json::value& t )
 {
   selected_cb selected;
   dom::element r = el.parent(); // ATTN: I assume here that all checkboxes in the group belong to the same parent!
   r.find_all(&selected, "[type='checkbox'][name='%S']", el.get_attribute("name"));
   int m = 1, v = selected.elements.size()==1?(t.get(false)?1:0):t.get(0);
   for( unsigned int n = 0; n < selected.elements.size(); ++n, m <<= 1 )
   {
     dom::element& e = selected.elements[n];
     if( (v & m) != 0)
         e.set_state(  STATE_CHECKED, 0 ) ;
     else
         e.set_state(  0, STATE_CHECKED ) ;
   }
 }

cache_pool::cache_pool(json::value const &settings) :
	d(new _data())
{
	std::string type = settings.get("cache.backend","none");
#ifndef CPPCMS_NO_CACHE
	if(type=="thread_shared") {
		if(settings.get("service.worker_processes",0)>1)
			throw cppcms_error(
				"Can't use `thread_shared' backend with more then one process ether set "
				"service.worker_processes to 0 or 1 or use cache.backend=\"process_shared\"");
		unsigned items = settings.get("cache.limit",64);
		d->module=impl::thread_cache_factory(items);
	}
	else if(type=="process_shared") {
#if defined(CPPCMS_WIN32)
		throw cppcms_error("The 'process_shared' backend is not supported under MS Windows and Cygwin platforms");
#elif defined(CPPCMS_NO_PREFOK_CACHE)
		throw cppcms_error("The 'process_shared' backend is disabled during build procedure");
#else // has prefork cache
		size_t memory = settings.get("cache.memory",16384);
		if(memory < 64)
			throw cppcms_error("'process_shared' cache backend requires at least 64 KB of cache memory: cache.memory >= 64");
		unsigned items = settings.get("cache.limit",memory);
		d->module=impl::process_cache_factory(memory*1024,items);
#endif // prefork cache
	}	
	else
#endif // no cache
	if(type != "none" ) {
		throw cppcms_error("Unsupported cache backend `" + type + "'");
	}
#ifndef CPPCMS_NO_TCP_CACHE	
	if(settings.find("cache.tcp").type()==json::is_object) {

		std::vector<std::string> ips=settings.get<std::vector<std::string> >("cache.tcp.ips");
		std::vector<int> ports = settings.get<std::vector<int> >("cache.tcp.ports");

		if(ips.empty() || ports.empty() || ips.size()!=ports.size()) {
			throw cppcms_error("Invalid settings in cache.tcp.ports or cache.tcp.ips");
		}

		booster::intrusive_ptr<impl::base_cache> l1=d->module;
		d->module=impl::tcp_cache_factory(ips,ports,l1);
	}
#endif // no tcp cace
}

 inline void set_radio_index( dom::element& el, const json::value& t  )
 {
   selected_cb selected;
   dom::element r = el.parent(); // ATTN: I assume here that all radios in the group belong to the same parent!
   r.find_all(&selected, "[type='radio'][name='%S']", el.get_attribute("name"));
   unsigned int idx = (unsigned int)t.get(0);
   for( unsigned int n = 0; n < selected.elements.size(); ++n )
   {
     dom::element& e = selected.elements[n];
     if ( n == idx)
     {
       e.set_value(json::value(true));
       break;
     }
   }
 }

/** Set value of the DOM element. Sets value for elements recognized by get_ctl_type() function. 
 * \param[in] el \b const dom::element&, The element.
 * \param[in] v \b const json::value&, The value.
 **/
  inline void set_value(dom::element& el, const json::value& v )
  {
    switch(get_ctl_type(el))
    {
      case CTL_UNKNOWN:         break;
      case CTL_EDIT:
      case CTL_DECIMAL:
      case CTL_CURRENCY:
      case CTL_PASSWORD:
      case CTL_NUMERIC: 
      case CTL_PROGRESS:        
      case CTL_SLIDER:          
      case CTL_SELECT_SINGLE:   
      case CTL_SELECT_MULTIPLE: 
      case CTL_DD_SELECT:       
      case CTL_TEXTAREA:
      case CTL_DATE:
      case CTL_CALENDAR:
      case CTL_HIDDEN:
      default:
        el.set_value(v);
        break;
      // special cases:
      case CTL_BUTTON:          break;
      case CTL_CHECKBOX:        set_checkbox_bits(el,v); break;
      case CTL_RADIO:           set_radio_index(el,v);  break;
      case CTL_HTMLAREA:        
       {
          aux::w2utf utf8(static_cast<const wchar_t*>(v.get( L"" ))); 
          el.set_html( utf8, utf8.length() );
          //el.update();
        } break;
      case CTL_NO:
        assert(false);
        break;
    }
  }

 json::value main_frame::set_glass(json::value on_off)
 {
    json::value pv = get_glass();
    switch_glass(on_off.get(false));
    return pv;
 }

	void daemonizer::daemonize(json::value const &conf)
	{
		if(getppid() == 1)
			return;
		
		if(!conf.get("daemon.enable",false))
			return;
		
		int gid = -1;
		int uid = -1;
		
		int devnull_fd = -1;
		int lock_fd = -1;

		try {
		
			devnull_fd = open("/dev/null",O_RDWR);
			
			if(devnull_fd < 0) {
				int err = errno;
				throw cppcms_error(err,"Failed to open /dev/null");
			}
			
			std::string group = conf.get("daemon.group","");
			if(!group.empty()) {
				struct group *gr = getgrnam(group.c_str());
				if(!gr)
					throw cppcms_error("Invalid group " + group);
				gid = gr->gr_gid;
			}
			
			std::string user = conf.get("daemon.user","");
			if(!user.empty()) {
				struct passwd *pw = getpwnam(user.c_str());
				if(!pw)
					throw cppcms_error("Invalid user " + user);
				uid = pw->pw_uid;
				if(gid==-1)
					gid = pw->pw_gid;
			}
			
			std::string chroot_dir = conf.get("daemon.chroot","");

			if(!chroot_dir.empty()) {
				global_urandom_fd = open("/dev/urandom",O_RDONLY);
				if(global_urandom_fd < 0) {
					int err = errno;
					throw cppcms_error(err,"Failed to open /dev/urandom");
				}

				if(chdir(chroot_dir.c_str()) < 0) {
					int err = errno;
					throw cppcms_error(err,"Failed to chdir to " + chroot_dir);
				}
				if(chroot(chroot_dir.c_str()) < 0) {
					int err = errno;
					throw cppcms_error(err,"Failed to chroot to " + chroot_dir);
				}

			}

			int fd_limit = conf.get("daemon.fdlimit",-1);
			if(fd_limit != -1) {
				struct rlimit lm;
				lm.rlim_cur = fd_limit;
				lm.rlim_max = fd_limit;
				if(setrlimit(RLIMIT_NOFILE,&lm) < 0) {
					int err = errno;
					throw cppcms_error(err,"Failed to change daemon.fdlimit");
				}
			}
			
			if(gid!=-1) {
				if(setgid(gid) < 0) {
					int err = errno;
					throw cppcms_error(err,"Failed setgid to group " + group);
				}
			}

			if(uid!=-1) {
				if(setuid(uid) < 0) {
					int err = errno;
					throw cppcms_error(err,"Failed setuid to user " + user);
				}
			}


			std::string lock_file = conf.get("daemon.lock","");
			if(!lock_file.empty()) {
				if(lock_file[0]!='/') {
					char *wd = 0;
					std::vector<char> buf(256);
					while((wd=getcwd(&buf.front(),buf.size()))==0 && errno==ERANGE)
						buf.resize(buf.size()*2);
					if(!wd) {
						int err=errno;
						throw cppcms_error(err,"getcwd failed");
					}
					lock_file=wd + ("/" + lock_file);
				}
//.........这里部分代码省略.........