taixingyiji/subconverter
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Optimize codes

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Force fileGet to use binary mode to prevent some problem.
Make cache system serve the existing cache when download failed.
Replace some if-statements with switch-statements.
Clean up codes.
This commit is contained in:
Tindy X committed 2020-02-22 20:32:49 +08:00
1 parent e3726192dd
commit 3efd22a1f3
8 files changed
+223 -180
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src/webget.cpp
+23 -12
View File
@@ -10,7 +10,9 @@
#include "logger.h"
#ifdef _WIN32
#ifndef _stat
#define _stat stat
#endif // _stat
#endif // _WIN32
extern bool print_debug_info;
@@ -110,30 +112,39 @@ std::string webGet(std::string url, std::string proxy, std::string &response_hea
if(cache_ttl > 0)
{
md("cache");
std::string url_md5 = getMD5(url);
std::string path = "cache/" + url_md5;
const std::string url_md5 = getMD5(url);
const std::string path = "cache/" + url_md5, path_header = path + "_header";
struct stat result;
if(stat(path.data(), &result) == 0)
if(stat(path.data(), &result) == 0) // cache exist
{
time_t mtime = result.st_mtime, now = time(NULL);
if(difftime(now, mtime) <= cache_ttl)
time_t mtime = result.st_mtime, now = time(NULL); // get cache modified time and current time
if(difftime(now, mtime) <= cache_ttl) // within TTL
{
writeLog(0, "CACHE HIT: '" + url + "', using local cache.");
response_headers = fileGet(path + "_header", true, true);
return fileGet(path, true, true);
response_headers = fileGet(path_header, true);
return fileGet(path, true);
}
writeLog(0, "CACHE MISS: '" + url + "', TTL timeout, creating new cache.");
writeLog(0, "CACHE MISS: '" + url + "', TTL timeout, creating new cache."); // out of TTL
}
else
writeLog(0, "CACHE NOT EXIST: '" + url + "', creating new cache.");
content = curlGet(url, proxy, response_headers, return_code);
if(return_code == CURLE_OK)
content = curlGet(url, proxy, response_headers, return_code); // try to fetch data
if(return_code == CURLE_OK) // success, save new cache
{
fileWrite(path, content, true);
fileWrite(path + "_header", response_headers, true);
fileWrite(path_header, response_headers, true);
}
else
writeLog(0, "Fetched failed. Skip creating new cache.");
{
if(fileExist(path)) // failed, check if cache exist
{
writeLog(0, "Fetch failed. Serving cached content."); // cache exist, serving cache
content = fileGet(path, true);
response_headers = fileGet(path_header, true);
}
else
writeLog(0, "Fetch failed. No local cache available."); // cache not exist, serving nothing
}
return content;
}
return curlGet(url, proxy, response_headers, return_code);