97 lines
2.3 KiB
C++
97 lines
2.3 KiB
C++
#ifndef HV_FILE_CACHE_H_
|
|
#define HV_FILE_CACHE_H_
|
|
|
|
#include <memory>
|
|
#include <map>
|
|
#include <string>
|
|
#include <mutex>
|
|
|
|
#include "hbuf.h"
|
|
#include "hstring.h"
|
|
|
|
#define HTTP_HEADER_MAX_LENGTH 1024 // 1K
|
|
#define FILE_CACHE_MAX_SIZE (1 << 22) // 4M
|
|
|
|
typedef struct file_cache_s {
|
|
std::string filepath;
|
|
struct stat st;
|
|
time_t open_time;
|
|
time_t stat_time;
|
|
uint32_t stat_cnt;
|
|
HBuf buf; // http_header + file_content
|
|
hbuf_t filebuf;
|
|
hbuf_t httpbuf;
|
|
char last_modified[64];
|
|
char etag[64];
|
|
std::string content_type;
|
|
|
|
file_cache_s() {
|
|
stat_cnt = 0;
|
|
}
|
|
|
|
bool is_modified() {
|
|
time_t mtime = st.st_mtime;
|
|
stat(filepath.c_str(), &st);
|
|
return mtime != st.st_mtime;
|
|
}
|
|
|
|
bool is_complete() {
|
|
return filebuf.len == st.st_size;
|
|
}
|
|
|
|
void resize_buf(int filesize) {
|
|
buf.resize(HTTP_HEADER_MAX_LENGTH + filesize);
|
|
filebuf.base = buf.base + HTTP_HEADER_MAX_LENGTH;
|
|
filebuf.len = filesize;
|
|
}
|
|
|
|
void prepend_header(const char* header, int len) {
|
|
if (len > HTTP_HEADER_MAX_LENGTH) return;
|
|
httpbuf.base = filebuf.base - len;
|
|
httpbuf.len = len + filebuf.len;
|
|
memcpy(httpbuf.base, header, len);
|
|
}
|
|
} file_cache_t;
|
|
|
|
typedef std::shared_ptr<file_cache_t> file_cache_ptr;
|
|
// filepath => file_cache_ptr
|
|
typedef std::map<std::string, file_cache_ptr> FileCacheMap;
|
|
|
|
class FileCache {
|
|
public:
|
|
FileCacheMap cached_files;
|
|
std::mutex mutex_;
|
|
int stat_interval;
|
|
int expired_time;
|
|
|
|
FileCache() {
|
|
stat_interval = 10; // s
|
|
expired_time = 60; // s
|
|
}
|
|
|
|
struct OpenParam {
|
|
bool need_read;
|
|
int max_read;
|
|
const char* path;
|
|
size_t filesize;
|
|
int error;
|
|
|
|
OpenParam() {
|
|
need_read = true;
|
|
max_read = FILE_CACHE_MAX_SIZE;
|
|
path = "/";
|
|
filesize = 0;
|
|
error = 0;
|
|
}
|
|
};
|
|
file_cache_ptr Open(const char* filepath, OpenParam* param);
|
|
bool Close(const char* filepath);
|
|
bool Close(const file_cache_ptr& fc);
|
|
void RemoveExpiredFileCache();
|
|
|
|
protected:
|
|
file_cache_ptr Get(const char* filepath);
|
|
};
|
|
|
|
#endif // HV_FILE_CACHE_H_
|