nghttpd: Cache fd
Implement fd caching for static files. The response body for such as 404 was dynamically generated previously, but now it is written in temporally file and its fd is cached. Currently, cache is reference counted and expired when count becomes 0. This makes caching is not effective other than "busy" period, but we don't need this feature if we are not busy.
This commit is contained in:
Tatsuhiro Tsujikawa
parent
85671a69bf
commit
102ea7c0bb
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@ -57,11 +57,6 @@
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namespace nghttp2 {
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namespace {
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const std::string STATUS_200 = "200";
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const std::string STATUS_301 = "301";
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const std::string STATUS_304 = "304";
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const std::string STATUS_400 = "400";
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const std::string STATUS_404 = "404";
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const std::string DEFAULT_HTML = "index.html";
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const std::string NGHTTPD_SERVER = "nghttpd nghttp2/" NGHTTP2_VERSION;
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} // namespace
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@ -171,9 +166,10 @@ void fill_callback(nghttp2_session_callbacks *callbacks, const Config *config);
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class Sessions {
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public:
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Sessions(struct ev_loop *loop, const Config *config, SSL_CTX *ssl_ctx)
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: loop_(loop), config_(config), ssl_ctx_(ssl_ctx), callbacks_(nullptr),
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next_session_id_(1), tstamp_cached_(ev_now(loop)),
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Sessions(HttpServer *sv, struct ev_loop *loop, const Config *config,
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SSL_CTX *ssl_ctx)
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: sv_(sv), loop_(loop), config_(config), ssl_ctx_(ssl_ctx),
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callbacks_(nullptr), next_session_id_(1), tstamp_cached_(ev_now(loop)),
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cached_date_(util::http_date(tstamp_cached_)) {
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nghttp2_session_callbacks_new(&callbacks_);
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@ -244,9 +240,37 @@ public:
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}
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return cached_date_;
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}
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FileEntry *get_cached_fd(const std::string &path) {
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auto i = fd_cache_.find(path);
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if (i == std::end(fd_cache_)) {
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return nullptr;
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}
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auto &ent = (*i).second;
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++ent.usecount;
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return &ent;
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}
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FileEntry *cache_fd(const std::string &path, const FileEntry &ent) {
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auto rv = fd_cache_.emplace(path, ent);
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return &(*rv.first).second;
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}
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void release_fd(const std::string &path) {
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auto i = fd_cache_.find(path);
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if (i == std::end(fd_cache_)) {
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return;
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}
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auto &ent = (*i).second;
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if (--ent.usecount == 0) {
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close(ent.fd);
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fd_cache_.erase(i);
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}
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}
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const HttpServer *get_server() const { return sv_; }
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private:
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std::set<Http2Handler *> handlers_;
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// cache for file descriptors to read file.
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std::map<std::string, FileEntry> fd_cache_;
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HttpServer *sv_;
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struct ev_loop *loop_;
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const Config *config_;
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SSL_CTX *ssl_ctx_;
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@ -257,7 +281,8 @@ private:
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};
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Stream::Stream(Http2Handler *handler, int32_t stream_id)
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: handler(handler), body_left(0), stream_id(stream_id), file(-1) {
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: handler(handler), file_ent(nullptr), body_length(0), body_offset(0),
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stream_id(stream_id) {
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auto config = handler->get_config();
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ev_timer_init(&rtimer, stream_timeout_cb, 0., config->stream_read_timeout);
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ev_timer_init(&wtimer, stream_timeout_cb, 0., config->stream_write_timeout);
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@ -270,8 +295,9 @@ Stream::Stream(Http2Handler *handler, int32_t stream_id)
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}
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Stream::~Stream() {
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if (file != -1) {
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close(file);
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if (file_ent != nullptr) {
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auto sessions = handler->get_sessions();
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sessions->release_fd(file_ent->path);
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}
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auto loop = handler->get_loop();
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@ -835,12 +861,12 @@ ssize_t file_read_callback(nghttp2_session *session, int32_t stream_id,
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auto hd = static_cast<Http2Handler *>(user_data);
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auto stream = hd->get_stream(stream_id);
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size_t nread = std::min(stream->body_left, static_cast<int64_t>(length));
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auto nread = std::min(stream->body_length - stream->body_offset,
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static_cast<int64_t>(length));
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*data_flags |= NGHTTP2_DATA_FLAG_NO_COPY;
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stream->body_left -= nread;
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if (nread == 0 || stream->body_left <= 0) {
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if (nread == 0 || stream->body_length == stream->body_offset + nread) {
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*data_flags |= NGHTTP2_DATA_FLAG_EOF;
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auto config = hd->get_config();
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@ -872,59 +898,27 @@ ssize_t file_read_callback(nghttp2_session *session, int32_t stream_id,
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}
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namespace {
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void prepare_status_response(Stream *stream, Http2Handler *hd,
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const std::string &status) {
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int pipefd[2];
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if (status == STATUS_304 || pipe(pipefd) == -1) {
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hd->submit_response(status, stream->stream_id, 0);
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return;
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}
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std::string body;
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body.reserve(256);
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body = "<html><head><title>";
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body += status;
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body += "</title></head><body><h1>";
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body += status;
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body += "</h1><hr><address>";
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body += NGHTTPD_SERVER;
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body += " at port ";
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body += util::utos(hd->get_config()->port);
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body += "</address>";
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body += "</body></html>";
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void prepare_status_response(Stream *stream, Http2Handler *hd, int status) {
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auto sessions = hd->get_sessions();
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auto status_page = sessions->get_server()->get_status_page(status);
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auto file_ent = &status_page->file_ent;
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// we don't set stream->file_ent since we don't want to expire it.
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stream->body_length = file_ent->length;
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nghttp2_data_provider data_prd;
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data_prd.source.fd = file_ent->fd;
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data_prd.read_callback = file_read_callback;
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Headers headers;
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if (hd->get_config()->error_gzip) {
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gzFile write_fd = gzdopen(pipefd[1], "w");
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gzwrite(write_fd, body.c_str(), body.size());
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gzclose(write_fd);
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headers.emplace_back("content-encoding", "gzip");
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} else {
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ssize_t rv;
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while ((rv = write(pipefd[1], body.c_str(), body.size())) == -1 &&
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errno == EINTR)
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;
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if (rv != static_cast<ssize_t>(body.size())) {
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std::cerr << "Could not write all response body: " << rv << std::endl;
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}
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}
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close(pipefd[1]);
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stream->file = pipefd[0];
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stream->body_left = body.size();
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nghttp2_data_provider data_prd;
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data_prd.source.fd = pipefd[0];
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data_prd.read_callback = file_read_callback;
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headers.emplace_back("content-type", "text/html; charset=UTF-8");
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hd->submit_response(status, stream->stream_id, headers, &data_prd);
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hd->submit_response(status_page->status, stream->stream_id, headers,
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&data_prd);
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}
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} // namespace
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namespace {
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void prepare_redirect_response(Stream *stream, Http2Handler *hd,
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const std::string &path,
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const std::string &status) {
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const std::string &path, int status) {
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auto scheme =
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http2::get_header(stream->hdidx, http2::HD__SCHEME, stream->headers);
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auto authority =
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@ -941,7 +935,10 @@ void prepare_redirect_response(Stream *stream, Http2Handler *hd,
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auto headers = Headers{{"location", redirect_url}};
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hd->submit_response(status, stream->stream_id, headers, nullptr);
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auto sessions = hd->get_sessions();
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auto status_page = sessions->get_server()->get_status_page(status);
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hd->submit_response(status_page->status, stream->stream_id, headers, nullptr);
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}
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} // namespace
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@ -975,7 +972,7 @@ void prepare_response(Stream *stream, Http2Handler *hd,
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url = util::percentDecode(url.begin(), url.end());
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if (!util::check_path(url)) {
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prepare_status_response(stream, hd, STATUS_404);
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prepare_status_response(stream, hd, 404);
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return;
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}
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auto push_itr = hd->get_config()->push.find(url);
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@ -992,51 +989,66 @@ void prepare_response(Stream *stream, Http2Handler *hd,
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if (path[path.size() - 1] == '/') {
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path += DEFAULT_HTML;
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}
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int file = open(path.c_str(), O_RDONLY | O_BINARY);
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if (file == -1) {
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prepare_status_response(stream, hd, STATUS_404);
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return;
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}
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auto sessions = hd->get_sessions();
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auto file_ent = sessions->get_cached_fd(path);
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struct stat buf;
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if (file_ent == nullptr) {
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int file = open(path.c_str(), O_RDONLY | O_BINARY);
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if (file == -1) {
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prepare_status_response(stream, hd, 404);
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if (fstat(file, &buf) == -1) {
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close(file);
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prepare_status_response(stream, hd, STATUS_404);
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return;
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}
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if (buf.st_mode & S_IFDIR) {
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close(file);
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if (query_pos == std::string::npos) {
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reqpath += "/";
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} else {
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reqpath.insert(query_pos, "/");
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return;
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}
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prepare_redirect_response(stream, hd, reqpath, STATUS_301);
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struct stat buf;
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if (fstat(file, &buf) == -1) {
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close(file);
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prepare_status_response(stream, hd, 404);
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return;
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}
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if (buf.st_mode & S_IFDIR) {
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close(file);
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if (query_pos == std::string::npos) {
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reqpath += "/";
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} else {
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reqpath.insert(query_pos, "/");
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}
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prepare_redirect_response(stream, hd, reqpath, 301);
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return;
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}
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if (last_mod_found && buf.st_mtime <= last_mod) {
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close(file);
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prepare_status_response(stream, hd, 304);
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return;
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}
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file_ent = sessions->cache_fd(
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path, FileEntry(path, buf.st_size, buf.st_mtime, file));
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} else if (last_mod_found && file_ent->mtime <= last_mod) {
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sessions->release_fd(file_ent->path);
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prepare_status_response(stream, hd, 304);
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return;
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}
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stream->file = file;
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stream->body_left = buf.st_size;
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stream->file_ent = file_ent;
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stream->body_length = file_ent->length;
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nghttp2_data_provider data_prd;
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data_prd.source.fd = file;
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data_prd.source.fd = file_ent->fd;
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data_prd.read_callback = file_read_callback;
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if (last_mod_found && buf.st_mtime <= last_mod) {
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prepare_status_response(stream, hd, STATUS_304);
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return;
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}
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hd->submit_file_response(STATUS_200, stream, buf.st_mtime, buf.st_size,
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hd->submit_file_response("200", stream, file_ent->mtime, file_ent->length,
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&data_prd);
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}
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} // namespace
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@ -1220,6 +1232,7 @@ int send_data_callback(nghttp2_session *session, nghttp2_frame *frame,
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auto hd = static_cast<Http2Handler *>(user_data);
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auto wb = hd->get_wb();
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auto padlen = frame->data.padlen;
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auto stream = hd->get_stream(frame->hd.stream_id);
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if (wb->wleft() < 9 + length + padlen) {
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return NGHTTP2_ERR_WOULDBLOCK;
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@ -1237,17 +1250,18 @@ int send_data_callback(nghttp2_session *session, nghttp2_frame *frame,
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while (length) {
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ssize_t nread;
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while ((nread = read(fd, p, length)) == -1 && errno == EINTR)
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while ((nread = pread(fd, p, length, stream->body_offset)) == -1 &&
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errno == EINTR)
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;
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if (nread == -1) {
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auto stream = hd->get_stream(frame->hd.stream_id);
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remove_stream_read_timeout(stream);
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remove_stream_write_timeout(stream);
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return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
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}
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stream->body_offset += nread;
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length -= nread;
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p += nread;
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}
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@ -1380,7 +1394,7 @@ void run_worker(Worker *worker) {
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class AcceptHandler {
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public:
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AcceptHandler(Sessions *sessions, const Config *config)
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AcceptHandler(HttpServer *sv, Sessions *sessions, const Config *config)
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: sessions_(sessions), config_(config), next_worker_(0) {
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if (config_->num_worker == 1) {
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return;
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@ -1392,7 +1406,7 @@ public:
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auto worker = make_unique<Worker>();
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auto loop = ev_loop_new(0);
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worker->sessions =
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make_unique<Sessions>(loop, config_, sessions_->get_ssl_ctx());
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make_unique<Sessions>(sv, loop, config_, sessions_->get_ssl_ctx());
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ev_async_init(&worker->w, worker_acceptcb);
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worker->w.data = worker.get();
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ev_async_start(loop, &worker->w);
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@ -1476,7 +1490,61 @@ void acceptcb(struct ev_loop *loop, ev_io *w, int revents) {
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}
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} // namespace
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HttpServer::HttpServer(const Config *config) : config_(config) {}
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namespace {
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FileEntry make_status_body(int status, uint16_t port) {
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std::string body;
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body = "<html><head><title>";
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body += http2::get_status_string(status);
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body += "</title></head><body><h1>";
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body += http2::get_status_string(status);
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body += "</h1><hr><address>";
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body += NGHTTPD_SERVER;
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body += " at port ";
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body += util::utos(port);
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body += "</address>";
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body += "</body></html>";
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char tempfn[] = "/tmp/nghttpd.temp.XXXXXX";
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int fd = mkstemp(tempfn);
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if (fd == -1) {
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auto error = errno;
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std::cerr << "Could not open status response body file: errno=" << error;
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assert(0);
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}
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unlink(tempfn);
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ssize_t nwrite;
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while ((nwrite = write(fd, body.c_str(), body.size())) == -1 &&
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errno == EINTR)
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;
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if (nwrite == -1) {
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auto error = errno;
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std::cerr << "Could not write status response body into file: errno="
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<< error;
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assert(0);
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}
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return FileEntry(util::utos(status), nwrite, 0, fd);
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}
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} // namespace
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// index into HttpServer::status_pages_
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enum {
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IDX_200,
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IDX_301,
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IDX_304,
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IDX_400,
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IDX_404,
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};
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HttpServer::HttpServer(const Config *config) : config_(config) {
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status_pages_ = std::vector<StatusPage>{
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{"200", make_status_body(200, config_->port)},
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{"301", make_status_body(301, config_->port)},
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{"304", make_status_body(304, config_->port)},
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{"400", make_status_body(400, config_->port)},
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{"404", make_status_body(404, config_->port)},
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};
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}
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namespace {
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int next_proto_cb(SSL *s, const unsigned char **data, unsigned int *len,
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@ -1497,14 +1565,14 @@ int verify_callback(int preverify_ok, X509_STORE_CTX *ctx) {
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} // namespace
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namespace {
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int start_listen(struct ev_loop *loop, Sessions *sessions,
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int start_listen(HttpServer *sv, struct ev_loop *loop, Sessions *sessions,
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const Config *config) {
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addrinfo hints;
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int r;
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bool ok = false;
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const char *addr = nullptr;
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auto acceptor = std::make_shared<AcceptHandler>(sessions, config);
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auto acceptor = std::make_shared<AcceptHandler>(sv, sessions, config);
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auto service = util::utos(config->port);
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memset(&hints, 0, sizeof(addrinfo));
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@ -1699,8 +1767,8 @@ int HttpServer::run() {
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auto loop = EV_DEFAULT;
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Sessions sessions(loop, config_, ssl_ctx);
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if (start_listen(loop, &sessions, config_) != 0) {
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Sessions sessions(this, loop, config_, ssl_ctx);
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if (start_listen(this, loop, &sessions, config_) != 0) {
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std::cerr << "Could not listen" << std::endl;
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return -1;
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}
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@ -1711,4 +1779,22 @@ int HttpServer::run() {
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const Config *HttpServer::get_config() const { return config_; }
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const StatusPage *HttpServer::get_status_page(int status) const {
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switch (status) {
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case 200:
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return &status_pages_[IDX_200];
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case 301:
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return &status_pages_[IDX_301];
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case 304:
|
||||
return &status_pages_[IDX_304];
|
||||
case 400:
|
||||
return &status_pages_[IDX_400];
|
||||
case 404:
|
||||
return &status_pages_[IDX_404];
|
||||
default:
|
||||
assert(0);
|
||||
}
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
} // namespace nghttp2
|
||||
|
|
|
|||
|
|
@ -78,14 +78,27 @@ struct Config {
|
|||
|
||||
class Http2Handler;
|
||||
|
||||
struct FileEntry {
|
||||
FileEntry(std::string path, int64_t length, int64_t mtime, int fd)
|
||||
: path(std::move(path)), length(length), mtime(mtime), dlprev(nullptr),
|
||||
dlnext(nullptr), fd(fd), usecount(1) {}
|
||||
std::string path;
|
||||
int64_t length;
|
||||
int64_t mtime;
|
||||
FileEntry *dlprev, *dlnext;
|
||||
int fd;
|
||||
int usecount;
|
||||
};
|
||||
|
||||
struct Stream {
|
||||
Headers headers;
|
||||
Http2Handler *handler;
|
||||
FileEntry *file_ent;
|
||||
ev_timer rtimer;
|
||||
ev_timer wtimer;
|
||||
int64_t body_left;
|
||||
int64_t body_length;
|
||||
int64_t body_offset;
|
||||
int32_t stream_id;
|
||||
int file;
|
||||
http2::HeaderIndex hdidx;
|
||||
Stream(Http2Handler *handler, int32_t stream_id);
|
||||
~Stream();
|
||||
|
|
@ -160,14 +173,21 @@ private:
|
|||
int fd_;
|
||||
};
|
||||
|
||||
struct StatusPage {
|
||||
std::string status;
|
||||
FileEntry file_ent;
|
||||
};
|
||||
|
||||
class HttpServer {
|
||||
public:
|
||||
HttpServer(const Config *config);
|
||||
int listen();
|
||||
int run();
|
||||
const Config *get_config() const;
|
||||
const StatusPage *get_status_page(int status) const;
|
||||
|
||||
private:
|
||||
std::vector<StatusPage> status_pages_;
|
||||
const Config *config_;
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue