445 lines
12 KiB
C
445 lines
12 KiB
C
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#include "connection.h"
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#include "network.h"
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#include "utils.h"
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#include "plugin_core.h"
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void con_put(server *srv, connection *con); /* server.c */
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void internal_error(server *srv, connection *con) {
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if (con->response_headers_sent) {
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CON_ERROR(srv, con, "%s", "Couldn't send '500 Internal Error': headers already sent");
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connection_set_state(srv, con, CON_STATE_ERROR);
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} else {
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http_headers_reset(con->response.headers);
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con->response.http_status = 500;
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con->content_handler = NULL;
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connection_set_state(srv, con, CON_STATE_WRITE_RESPONSE);
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}
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}
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static void parse_request_body(server *srv, connection *con) {
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UNUSED(srv);
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if ( con->state >= CON_STATE_READ_REQUEST_CONTENT
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&& con->state <= CON_STATE_WRITE_RESPONSE
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&& !con->in->is_closed) {
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if (con->request.content_length == -1) {
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/* TODO: parse chunked encoded request body, filters */
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chunkqueue_steal_all(con->in, con->raw_in);
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} else {
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if (con->in->bytes_in < con->request.content_length) {
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chunkqueue_steal_len(con->in, con->raw_in, con->request.content_length - con->in->bytes_in);
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}
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if (con->in->bytes_in == con->request.content_length) con->in->is_closed = TRUE;
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}
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}
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}
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static void forward_response_body(server *srv, connection *con) {
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UNUSED(srv);
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if (con->state == CON_STATE_WRITE_RESPONSE && !con->raw_out->is_closed) {
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if (con->out->length > 0) {
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/* TODO: chunked encoding, filters */
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chunkqueue_steal_all(con->raw_out, con->out);
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}
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if (con->in->is_closed && 0 == con->raw_out->length)
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con->raw_out->is_closed = TRUE;
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if (con->raw_out->length > 0) {
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ev_io_add_events(srv->loop, &con->sock.watcher, EV_WRITE);
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} else {
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ev_io_rem_events(srv->loop, &con->sock.watcher, EV_WRITE);
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}
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}
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}
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static void connection_cb(struct ev_loop *loop, ev_io *w, int revents) {
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connection_socket *con_sock = (connection_socket*) w->data;
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server *srv = con_sock->srv;
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connection *con = con_sock->con;
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gboolean dojoblist = FALSE;
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UNUSED(loop);
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if (revents & EV_READ) {
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if (con->in->is_closed) {
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/* don't read the next request before current one is done */
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ev_io_rem_events(loop, w, EV_READ);
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} else {
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switch (network_read(srv, con, w->fd, con->raw_in)) {
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case NETWORK_STATUS_SUCCESS:
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dojoblist = TRUE;
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break;
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case NETWORK_STATUS_FATAL_ERROR:
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CON_ERROR(srv, con, "%s", "network read fatal error");
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connection_set_state(srv, con, CON_STATE_ERROR);
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dojoblist = TRUE;
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break;
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case NETWORK_STATUS_CONNECTION_CLOSE:
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con->raw_in->is_closed = TRUE;
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shutdown(w->fd, SHUT_RD);
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connection_set_state(srv, con, CON_STATE_CLOSE);
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dojoblist = TRUE;
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break;
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case NETWORK_STATUS_WAIT_FOR_EVENT:
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break;
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case NETWORK_STATUS_WAIT_FOR_AIO_EVENT:
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/* TODO: aio */
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ev_io_rem_events(loop, w, EV_READ);
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break;
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case NETWORK_STATUS_WAIT_FOR_FD:
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/* TODO: wait for fd */
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ev_io_rem_events(loop, w, EV_READ);
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break;
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}
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}
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}
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if (revents & EV_WRITE) {
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if (con->raw_out->length > 0) {
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switch (network_write(srv, con, w->fd, con->raw_out)) {
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case NETWORK_STATUS_SUCCESS:
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dojoblist = TRUE;
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break;
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case NETWORK_STATUS_FATAL_ERROR:
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CON_ERROR(srv, con, "%s", "network write fatal error");
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connection_set_state(srv, con, CON_STATE_ERROR);
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dojoblist = TRUE;
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break;
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case NETWORK_STATUS_CONNECTION_CLOSE:
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connection_set_state(srv, con, CON_STATE_CLOSE);
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dojoblist = TRUE;
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break;
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case NETWORK_STATUS_WAIT_FOR_EVENT:
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break;
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case NETWORK_STATUS_WAIT_FOR_AIO_EVENT:
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/* TODO: aio */
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ev_io_rem_events(loop, w, EV_WRITE);
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break;
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case NETWORK_STATUS_WAIT_FOR_FD:
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/* TODO: wait for fd */
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ev_io_rem_events(loop, w, EV_WRITE);
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break;
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}
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}
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if (con->raw_out->length == 0) {
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ev_io_rem_events(loop, w, EV_WRITE);
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dojoblist = TRUE;
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}
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}
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if (dojoblist)
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joblist_append(srv, con);
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}
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connection* connection_new(server *srv) {
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connection *con = g_slice_new0(connection);
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UNUSED(srv);
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con->state = CON_STATE_REQUEST_START;
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con->response_headers_sent = FALSE;
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con->expect_100_cont = FALSE;
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my_ev_init(&con->sock.watcher, connection_cb);
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ev_io_set(&con->sock.watcher, -1, 0);
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con->sock.srv = srv; con->sock.con = con; con->sock.watcher.data = &con->sock;
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con->remote_addr_str = g_string_sized_new(0);
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con->local_addr_str = g_string_sized_new(0);
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con->keep_alive = TRUE;
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con->raw_in = chunkqueue_new();
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con->raw_out = chunkqueue_new();
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con->in = chunkqueue_new();
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con->out = chunkqueue_new();
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action_stack_init(&con->action_stack);
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con->options = g_slice_copy(srv->option_count * sizeof(*srv->option_def_values), srv->option_def_values);
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request_init(&con->request, con->raw_in);
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physical_init(&con->physical);
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response_init(&con->response);
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return con;
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}
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void connection_reset(server *srv, connection *con) {
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con->state = CON_STATE_REQUEST_START;
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con->response_headers_sent = FALSE;
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con->expect_100_cont = FALSE;
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ev_io_stop(srv->loop, &con->sock.watcher);
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if (con->sock.watcher.fd != -1) {
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if (con->raw_in->is_closed) { /* read already shutdown */
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shutdown(con->sock.watcher.fd, SHUT_WR);
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close(con->sock.watcher.fd);
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} else {
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server_add_closing_socket(srv, con->sock.watcher.fd);
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}
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}
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ev_io_set(&con->sock.watcher, -1, 0);
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g_string_truncate(con->remote_addr_str, 0);
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g_string_truncate(con->local_addr_str, 0);
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con->keep_alive = TRUE;
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chunkqueue_reset(con->raw_in);
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chunkqueue_reset(con->raw_out);
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chunkqueue_reset(con->in);
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chunkqueue_reset(con->out);
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action_stack_reset(srv, &con->action_stack);
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memcpy(con->options, srv->option_def_values, srv->option_count * sizeof(*srv->option_def_values));
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request_reset(&con->request);
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physical_reset(&con->physical);
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response_reset(&con->response);
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}
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void connection_reset_keep_alive(server *srv, connection *con) {
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con->state = CON_STATE_REQUEST_START;
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con->response_headers_sent = FALSE;
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con->expect_100_cont = FALSE;
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ev_io_set_events(srv->loop, &con->sock.watcher, EV_READ);
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g_string_truncate(con->remote_addr_str, 0);
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g_string_truncate(con->local_addr_str, 0);
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con->keep_alive = TRUE;
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con->raw_out->is_closed = FALSE;
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chunkqueue_reset(con->in);
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chunkqueue_reset(con->out);
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action_stack_reset(srv, &con->action_stack);
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memcpy(con->options, srv->option_def_values, srv->option_count * sizeof(*srv->option_def_values));
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request_reset(&con->request);
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physical_reset(&con->physical);
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response_reset(&con->response);
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}
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void connection_free(server *srv, connection *con) {
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con->state = CON_STATE_REQUEST_START;
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con->response_headers_sent = FALSE;
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con->expect_100_cont = FALSE;
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ev_io_stop(srv->loop, &con->sock.watcher);
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if (con->sock.watcher.fd != -1) {
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if (con->raw_in->is_closed) { /* read already shutdown */
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shutdown(con->sock.watcher.fd, SHUT_WR);
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close(con->sock.watcher.fd);
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} else {
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server_add_closing_socket(srv, con->sock.watcher.fd);
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}
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}
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ev_io_set(&con->sock.watcher, -1, 0);
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g_string_free(con->remote_addr_str, TRUE);
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g_string_free(con->local_addr_str, TRUE);
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con->keep_alive = TRUE;
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chunkqueue_free(con->raw_in);
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chunkqueue_free(con->raw_out);
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chunkqueue_free(con->in);
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chunkqueue_free(con->out);
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action_stack_clear(srv, &con->action_stack);
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g_slice_free1(srv->option_count * sizeof(*srv->option_def_values), con->options);
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request_clear(&con->request);
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physical_clear(&con->physical);
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response_clear(&con->response);
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g_slice_free(connection, con);
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}
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void connection_set_state(server *srv, connection *con, connection_state_t state) {
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if (state < con->state) {
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CON_ERROR(srv, con, "Cannot move into requested state: %i => %i, move to error state", con->state, state);
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state = CON_STATE_ERROR;
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}
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con->state = state;
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}
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void connection_state_machine(server *srv, connection *con) {
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gboolean done = FALSE;
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do {
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switch (con->state) {
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case CON_STATE_REQUEST_START:
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connection_set_state(srv, con, CON_STATE_READ_REQUEST_HEADER);
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action_enter(con, srv->mainaction);
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break;
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case CON_STATE_READ_REQUEST_HEADER:
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if (CORE_OPTION(CORE_OPTION_DEBUG_REQUEST_HANDLING)) {
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TRACE(srv, "%s", "reading request header");
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}
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switch(http_request_parse(srv, con, &con->request.parser_ctx)) {
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case HANDLER_FINISHED:
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case HANDLER_GO_ON:
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connection_set_state(srv, con, CON_STATE_VALIDATE_REQUEST_HEADER);
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break;
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case HANDLER_WAIT_FOR_FD:
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/* TODO: wait for fd */
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done = TRUE;
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break;
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case HANDLER_WAIT_FOR_EVENT:
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done = TRUE;
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break;
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case HANDLER_ERROR:
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case HANDLER_COMEBACK: /* unexpected */
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/* unparsable header */
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connection_set_state(srv, con, CON_STATE_ERROR);
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break;
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}
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break;
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case CON_STATE_VALIDATE_REQUEST_HEADER:
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if (CORE_OPTION(CORE_OPTION_DEBUG_REQUEST_HANDLING)) {
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TRACE(srv, "%s", "validating request header");
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}
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connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST_HEADER);
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request_validate_header(srv, con);
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break;
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case CON_STATE_HANDLE_REQUEST_HEADER:
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if (CORE_OPTION(CORE_OPTION_DEBUG_REQUEST_HANDLING)) {
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TRACE(srv, "%s", "handle request header");
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}
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switch (action_execute(srv, con)) {
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case ACTION_WAIT_FOR_EVENT:
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done = TRUE;
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break;
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case ACTION_GO_ON:
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case ACTION_FINISHED:
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if (con->state == CON_STATE_HANDLE_REQUEST_HEADER) {
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internal_error(srv, con);
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}
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connection_set_state(srv, con, CON_STATE_WRITE_RESPONSE);
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break;
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case ACTION_ERROR:
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internal_error(srv, con);
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break;
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}
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break;
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case CON_STATE_READ_REQUEST_CONTENT:
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case CON_STATE_HANDLE_RESPONSE_HEADER:
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if (CORE_OPTION(CORE_OPTION_DEBUG_REQUEST_HANDLING)) {
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TRACE(srv, "%s", "read request/handle response header");
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}
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if (con->expect_100_cont) {
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if (CORE_OPTION(CORE_OPTION_DEBUG_REQUEST_HANDLING)) {
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TRACE(srv, "%s", "send 100 Continue");
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}
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chunkqueue_append_mem(con->raw_out, CONST_STR_LEN("HTTP/1.1 100 Continue\r\n\r\n"));
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con->expect_100_cont = FALSE;
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ev_io_add_events(srv->loop, &con->sock.watcher, EV_WRITE);
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}
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parse_request_body(srv, con);
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if (con->content_handler)
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con->content_handler->handle_content(srv, con, con->content_handler);
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switch (action_execute(srv, con)) {
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case ACTION_WAIT_FOR_EVENT:
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done = TRUE;
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break;
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case ACTION_GO_ON:
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case ACTION_FINISHED:
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connection_set_state(srv, con, CON_STATE_WRITE_RESPONSE);
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break;
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case ACTION_ERROR:
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internal_error(srv, con);
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break;
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}
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break;
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case CON_STATE_WRITE_RESPONSE:
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if (con->in->is_closed && con->raw_out->is_closed) {
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connection_set_state(srv, con, CON_STATE_RESPONSE_END);
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break;
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}
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if (!con->response_headers_sent) {
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con->response_headers_sent = TRUE;
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if (CORE_OPTION(CORE_OPTION_DEBUG_REQUEST_HANDLING)) {
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TRACE(srv, "%s", "write response headers");
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}
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response_send_headers(srv, con);
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}
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if (CORE_OPTION(CORE_OPTION_DEBUG_REQUEST_HANDLING)) {
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TRACE(srv, "%s", "write response");
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}
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parse_request_body(srv, con);
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if (con->content_handler)
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con->content_handler->handle_content(srv, con, con->content_handler);
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forward_response_body(srv, con);
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if (con->in->is_closed && con->raw_out->is_closed) {
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connection_set_state(srv, con, CON_STATE_RESPONSE_END);
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break;
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}
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if (con->state == CON_STATE_WRITE_RESPONSE) done = TRUE;
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break;
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case CON_STATE_RESPONSE_END:
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if (CORE_OPTION(CORE_OPTION_DEBUG_REQUEST_HANDLING)) {
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TRACE(srv, "response end (keep_alive = %i)", con->keep_alive);
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}
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plugins_handle_close(srv, con);
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if (con->keep_alive) {
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connection_reset_keep_alive(srv, con);
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} else {
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con_put(srv, con);
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done = TRUE;
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}
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break;
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case CON_STATE_CLOSE:
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if (CORE_OPTION(CORE_OPTION_DEBUG_REQUEST_HANDLING)) {
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TRACE(srv, "%s", "connection closed");
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}
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plugins_handle_close(srv, con);
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con_put(srv, con);
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done = TRUE;
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break;
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case CON_STATE_ERROR:
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if (CORE_OPTION(CORE_OPTION_DEBUG_REQUEST_HANDLING)) {
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TRACE(srv, "%s", "connection closed (error)");
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}
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plugins_handle_close(srv, con);
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con_put(srv, con);
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done = TRUE;
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break;
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}
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} while (!done);
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}
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void connection_handle_direct(server *srv, connection *con) {
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connection_set_state(srv, con, CON_STATE_WRITE_RESPONSE);
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con->out->is_closed = TRUE;
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}
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void connection_handle_indirect(server *srv, connection *con, plugin *p) {
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if (!p) {
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connection_handle_direct(srv, con);
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} else if (p->handle_content) {
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connection_set_state(srv, con, CON_STATE_READ_REQUEST_CONTENT);
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con->content_handler = p;
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} else {
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CON_ERROR(srv, con, "Indirect plugin '%s' handler has no handle_content callback", p->name);
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internal_error(srv, con);
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}
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}
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