rcpp_framework/core/file_cache.h

52 lines
1.2 KiB
C++

#ifndef FILE_CACHE_H
#define FILE_CACHE_H
#include <string>
#include <set>
#include <map>
#include <chrono>
#include <mutex>
class FileCache {
public:
std::string wwwroot;
int cache_invalidation_time;
//Note: file path should be the url you want to access the file with, inculding lead slash
//e.g. http://127.0.0.1/a/b/d.jpg -> /a/b/d.jpg
void wwwroot_register_file(const std::string &file_path);
void wwwroot_deregister_file(const std::string &file_path);
bool wwwroot_has_file(const std::string &file_path);
void wwwroot_refresh_cache();
void wwwroot_evaluate_dir(const char *path);
bool get_cached_body(const std::string &path, std::string *body);
void set_cached_body(const std::string &path, const std::string &body);
FileCache(bool singleton = false);
virtual ~FileCache();
static FileCache *get_singleton();
std::set<std::string> registered_files;
protected:
struct CacheEntry {
int64_t timestamp;
std::string body;
CacheEntry() {
timestamp = 0;
}
};
std::mutex cache_mutex;
std::map<std::string, CacheEntry *> cache_map;
private:
static FileCache *_instance;
};
#endif