47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
#include <FastHash.h>
|
|
|
|
#include "routes.h"
|
|
#include "../servehelper.h"
|
|
#include "../pixivclient.h"
|
|
#include "../hiredis_wrapper.h"
|
|
|
|
static inline std::optional<std::string> guess_extension(const std::string& path, PixivClient& pixiv_client);
|
|
|
|
void guess_extension_route(const httplib::Request& req, httplib::Response& res, const Config& config, PixivClient& pixiv_client, Redis* redis) {
|
|
using namespace std::string_literals;
|
|
|
|
std::string path = req.matches.str(1);
|
|
std::string cache_key = "pixwhile:i.pximg.net:ext:"s + std::to_string(FastHash(path.data(), path.size(), 0));
|
|
|
|
std::optional<std::string> extension = redis
|
|
? redis->get(cache_key)
|
|
: std::nullopt;
|
|
if (!extension) {
|
|
extension = guess_extension(path, pixiv_client);
|
|
if (!extension) {
|
|
res.status = 500;
|
|
serve_error(req, res, config, "500: Internal Server Error", "Failed to guess file extension for https://i.pximg.net"s + path);
|
|
return;
|
|
}
|
|
if (redis) {
|
|
redis->set(std::move(cache_key), *extension, 24 * 60 * 60);
|
|
}
|
|
}
|
|
|
|
serve_redirect(req, res, config, proxy_image_url(req, config, "https://i.pximg.net" + path + '.' + *extension), true);
|
|
}
|
|
|
|
static inline std::optional<std::string> guess_extension(const std::string& path, PixivClient& pixiv_client) {
|
|
auto guess_extension = [&](const char* extension) {
|
|
return pixiv_client.i_pximg_url_valid(path + '.' + extension);
|
|
};
|
|
|
|
if (guess_extension("png")) {
|
|
return "png";
|
|
} else if (guess_extension("jpg")) {
|
|
return "jpg";
|
|
} else {
|
|
return std::nullopt;
|
|
}
|
|
}
|