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Made the cache feature secured in #ifdef block and added it to the http

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example too
This commit is contained in:
Sébastien Huss 2016-12-20 22:15:58 +01:00
commit d4f5fddba3
3 changed files with 47 additions and 1 deletions
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35
http_examples.cpp
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@ -1,5 +1,8 @@
#include "server_http.hpp"
#include "client_http.hpp"
#ifdef HAVE_OPENSSL
#include "crypto.hpp"
#endif
//Added for the json-example
#define BOOST_SPIRIT_THREADSAFE
@ -19,6 +22,10 @@ using namespace boost::property_tree;
typedef SimpleWeb::Server<SimpleWeb::HTTP> HttpServer;
typedef SimpleWeb::Client<SimpleWeb::HTTP> HttpClient;
#ifdef HAVE_OPENSSL
std::string build_hash(const std::string full_file_name);
#endif
//Added for the default_resource example
void default_resource_send(const HttpServer &server, const shared_ptr<HttpServer::Response> &response,
const shared_ptr<ifstream> &ifs);
@ -108,6 +115,7 @@ int main() {
try {
auto web_root_path=boost::filesystem::canonical("web");
auto path=boost::filesystem::canonical(web_root_path/request->path);
std::string cache_ctrl = "";
//Check if path is within web_root_path
if(distance(web_root_path.begin(), web_root_path.end())>distance(path.begin(), path.end()) ||
!equal(web_root_path.begin(), web_root_path.end(), path.begin()))
@ -117,6 +125,19 @@ int main() {
if(!(boost::filesystem::exists(path) && boost::filesystem::is_regular_file(path)))
throw invalid_argument("file does not exist");
#ifdef HAVE_OPENSSL
//Support for HTTP Cache
std::string hash = build_hash(path.string());
auto it=request->header.find("If-None-Match");
if(it!=request->header.end()) {
if (it->second == "\""+hash+"\"") {
*response << "HTTP/1.1 304 Not Modified\r\nCache-Control: max-age=86400\r\nETag: \""+hash+"\"\r\n\r\n";
return;
}
}
cache_ctrl = "Cache-Control: max-age=86400\r\nETag: \""+hash+"\"\r\n";
#endif
auto ifs=make_shared<ifstream>();
ifs->open(path.string(), ifstream::in | ios::binary);
@ -180,3 +201,17 @@ void default_resource_send(const HttpServer &server, const shared_ptr<HttpServer
}
}
}
#ifdef HAVE_OPENSSL
std::string build_hash(const std::string full_file_name) {
std::string ret = "";
std::ifstream file(full_file_name, std::ios::binary | std::ios::ate);
std::streamsize size = file.tellg();
file.seekg(0, std::ios::beg);
std::vector<char> buffer(size);
if (!file.read(buffer.data(), size))
return ret;
ret = reinterpret_cast<char*> (&buffer[0]);
return SimpleWeb::Crypto::md5(ret,1);
}
#endif