| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_string.h> |
| #include <ngx_files.h> |
| #include <ngx_log.h> |
| #include <ngx_alloc.h> |
| #include <ngx_array.h> |
| #include <ngx_table.h> |
| #include <ngx_hunk.h> |
| #include <ngx_connection.h> |
| #include <ngx_event.h> |
| #include <ngx_event_timer.h> |
| #include <ngx_inet.h> |
| #include <ngx_http.h> |
| #include <ngx_http_config.h> |
| #include <ngx_http_core_module.h> |
| #include <ngx_http_output_filter.h> |
| |
| |
| static int ngx_http_init_request(ngx_event_t *ev); |
| static int ngx_http_process_request(ngx_event_t *ev); |
| static int ngx_http_process_request_line(ngx_http_request_t *r); |
| static int ngx_http_process_request_headers(ngx_http_request_t *r); |
| static int ngx_http_process_request_header_line(ngx_http_request_t *r); |
| static int ngx_http_request_handler(ngx_http_request_t *r, int error); |
| |
| static int ngx_http_writer(ngx_event_t *ev); |
| static int ngx_http_block_read(ngx_event_t *ev); |
| static int ngx_http_read_discarded_body(ngx_event_t *ev); |
| static int ngx_http_set_keepalive(ngx_http_request_t *r); |
| static int ngx_http_keepalive_handler(ngx_event_t *ev); |
| static int ngx_http_set_lingering_close(ngx_http_request_t *r); |
| static int ngx_http_lingering_close_handler(ngx_event_t *ev); |
| |
| static int ngx_http_close_connection(ngx_event_t *ev); |
| static void ngx_http_header_parse_error(ngx_http_request_t *r, int parse_err); |
| static size_t ngx_http_log_error(void *data, char *buf, size_t len); |
| |
| |
| |
| static char *header_errors[] = { |
| "client %s sent invalid method", |
| "client %s sent invalid request", |
| "client %s sent too long URI", |
| "client %s sent HEAD method in HTTP/0.9 request", |
| |
| "client %s sent invalid header, URL: %s", |
| "client %s sent too long header line, URL: %s", |
| "client %s sent HTTP/1.1 request without \"Host\" header, URL: %s" |
| }; |
| |
| |
| |
| static ngx_http_header_t headers_in[] = { |
| { ngx_string("Host"), offsetof(ngx_http_headers_in_t, host) }, |
| { ngx_string("Connection"), offsetof(ngx_http_headers_in_t, connection) }, |
| { ngx_string("If-Modified-Since"), |
| offsetof(ngx_http_headers_in_t, if_modified_since) }, |
| |
| { ngx_string("User-Agent"), offsetof(ngx_http_headers_in_t, user_agent) }, |
| |
| { ngx_null_string, 0 } |
| }; |
| |
| |
| int ngx_http_init_connection(ngx_connection_t *c) |
| { |
| ngx_event_t *rev; |
| ngx_http_log_ctx_t *ctx; |
| |
| rev = c->read; |
| rev->event_handler = ngx_http_init_request; |
| |
| rev->close_handler = ngx_http_close_connection; |
| c->write->close_handler = ngx_http_close_connection; |
| |
| ngx_test_null(c->addr_text.data, ngx_palloc(c->pool, c->addr_text_max_len), |
| NGX_ERROR); |
| |
| c->addr_text.len = ngx_sock_ntop(c->family, c->sockaddr, |
| c->addr_text.data, c->addr_text_max_len); |
| |
| if (c->addr_text.len == 0) { |
| return NGX_ERROR; |
| } |
| |
| ngx_test_null(ctx, ngx_pcalloc(c->pool, sizeof(ngx_http_log_ctx_t)), |
| NGX_ERROR); |
| ctx->client = c->addr_text.data; |
| ctx->action = "reading client request line"; |
| c->log->data = ctx; |
| c->log->handler = ngx_http_log_error; |
| |
| #if (HAVE_DEFERRED_ACCEPT) |
| |
| if (rev->ready) { |
| return ngx_http_init_request(rev); |
| } |
| |
| #endif |
| |
| ngx_add_timer(rev, c->post_accept_timeout); |
| rev->timer_set = 1; |
| |
| #if (USE_KQUEUE) |
| |
| return ngx_add_event(rev, NGX_READ_EVENT, NGX_CLEAR_EVENT); |
| |
| #else |
| |
| /* kqueue */ |
| |
| if (ngx_event_flags & NGX_HAVE_CLEAR_EVENT) { |
| return ngx_add_event(rev, NGX_READ_EVENT, NGX_CLEAR_EVENT); |
| } |
| |
| /* aio, iocp, epoll */ |
| |
| if (ngx_event_flags & (NGX_HAVE_AIO_EVENT|NGX_HAVE_EDGE_EVENT)) { |
| return ngx_http_init_request(rev); |
| } |
| |
| /* select, poll, /dev/poll */ |
| |
| return ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT); |
| |
| #endif /* USE_KQUEUE */ |
| } |
| |
| |
| static int ngx_http_init_request(ngx_event_t *rev) |
| { |
| ngx_connection_t *c; |
| ngx_http_request_t *r; |
| ngx_http_conf_ctx_t *ctx; |
| |
| c = (ngx_connection_t *) rev->data; |
| c->sent = 0; |
| |
| ngx_test_null(r, ngx_pcalloc(c->pool, sizeof(ngx_http_request_t)), |
| NGX_ERROR); |
| |
| c->data = r; |
| r->connection = c; |
| r->file.fd = NGX_INVALID_FILE; |
| |
| if (c->buffer == NULL) { |
| ngx_test_null(c->buffer, |
| ngx_create_temp_hunk(c->pool, |
| ngx_http_client_header_buffer_size, |
| 0, 0), |
| NGX_ERROR); |
| } else { |
| r->header_read = 1; |
| } |
| |
| r->pipeline = c->pipeline; |
| r->header_in = c->buffer; |
| |
| ngx_test_null(r->pool, ngx_create_pool(ngx_http_request_pool_size, c->log), |
| NGX_ERROR); |
| |
| ngx_test_null(r->ctx, |
| ngx_pcalloc(r->pool, sizeof(void *) * ngx_http_max_module), |
| ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR)); |
| |
| ctx = (ngx_http_conf_ctx_t *) c->ctx; |
| r->srv_conf = ctx->srv_conf; |
| r->loc_conf = ctx->loc_conf; |
| |
| r->headers_out.headers = ngx_create_table(r->pool, 10); |
| r->headers_out.content_length = -1; |
| r->headers_out.last_modified_time = -1; |
| |
| rev->event_handler = ngx_http_process_request; |
| r->state_handler = ngx_http_process_request_line; |
| |
| return ngx_http_process_request(rev); |
| } |
| |
| |
| static int ngx_http_process_request(ngx_event_t *rev) |
| { |
| int n, rc; |
| ngx_event_t *wev; |
| ngx_connection_t *c; |
| ngx_http_request_t *r; |
| ngx_http_log_ctx_t *lcx; |
| |
| c = (ngx_connection_t *) rev->data; |
| r = (ngx_http_request_t *) c->data; |
| |
| ngx_log_debug(c->log, "http process request"); |
| |
| if (rev->timedout) { |
| return ngx_http_close_request(r, NGX_HTTP_REQUEST_TIME_OUT); |
| } |
| |
| do { |
| |
| if (r->header_read) { |
| r->header_read = 0; |
| ngx_log_debug(c->log, "http preread %d" _ |
| r->header_in->last - r->header_in->pos); |
| |
| } else { |
| n = ngx_event_recv(c, r->header_in->last, |
| r->header_in->end - r->header_in->last); |
| |
| if (n == NGX_AGAIN) { |
| if (!r->header_timeout_set) { |
| |
| if (rev->timer_set) { |
| ngx_del_timer(rev); |
| } else { |
| rev->timer_set = 1; |
| } |
| |
| ngx_add_timer(rev, ngx_http_client_header_timeout); |
| r->header_timeout_set = 1; |
| } |
| |
| return NGX_AGAIN; |
| } |
| |
| if (n == NGX_ERROR) { |
| return ngx_http_close_request(r, NGX_HTTP_BAD_REQUEST); |
| } |
| |
| ngx_log_debug(c->log, "http read %d" _ n); |
| |
| if (n == 0) { |
| ngx_log_error(NGX_LOG_INFO, c->log, 0, |
| "client closed prematurely connection"); |
| return ngx_http_close_request(r, NGX_HTTP_BAD_REQUEST); |
| } |
| |
| r->header_in->last += n; |
| } |
| |
| /* the state handlers are called in the following order: |
| ngx_http_process_request_line(r) |
| ngx_http_process_request_headers(r) */ |
| |
| do { |
| rc = r->state_handler(r); |
| |
| } while (rc == NGX_AGAIN && r->header_in->pos < r->header_in->last); |
| |
| } while (rc == NGX_AGAIN |
| && (rev->ready || ngx_event_flags & NGX_HAVE_AIO_EVENT)); |
| |
| if (rc >= NGX_OK) { |
| |
| /* HTTP header done */ |
| |
| rev->event_handler = ngx_http_block_read; |
| |
| if (rc != NGX_OK) { |
| return ngx_http_finalize_request(r, rc); |
| } |
| |
| lcx = c->log->data; |
| lcx->action = "processing client request"; |
| |
| #if 0 |
| wev = c->write; |
| ngx_add_timer(wev, 5000); |
| wev->delayed = 1; |
| wev->timer_set = 1; |
| #endif |
| |
| rc = ngx_http_handler(r); |
| |
| /* a handler does its own processing */ |
| if (rc == NGX_DONE) { |
| return rc; |
| } |
| |
| if (rc == NGX_ERROR) { |
| rc = NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| return ngx_http_finalize_request(r, rc); |
| |
| } |
| |
| /* NGX_AGAIN */ |
| |
| if (!r->header_timeout_set) { |
| |
| if (rev->timer_set) { |
| ngx_del_timer(rev); |
| } else { |
| rev->timer_set = 1; |
| } |
| |
| ngx_add_timer(rev, ngx_http_client_header_timeout); |
| r->header_timeout_set = 1; |
| } |
| |
| return rc; |
| } |
| |
| |
| static int ngx_http_process_request_line(ngx_http_request_t *r) |
| { |
| int rc, offset; |
| ngx_connection_t *c; |
| ngx_http_log_ctx_t *lcx; |
| |
| rc = ngx_read_http_request_line(r); |
| |
| c = r->connection; |
| |
| /* a request line has been parsed successfully */ |
| |
| if (rc == NGX_OK) { |
| |
| if (r->http_version >= NGX_HTTP_VERSION_10 |
| && ngx_http_large_client_header == 0 |
| && r->header_in->pos == r->header_in->end) |
| { |
| ngx_http_header_parse_error(r, NGX_HTTP_PARSE_TOO_LONG_URI); |
| return NGX_HTTP_REQUEST_URI_TOO_LARGE; |
| } |
| |
| /* copy URI */ |
| |
| if (r->args_start) { |
| r->uri.len = r->args_start - 1 - r->uri_start; |
| } else { |
| r->uri.len = r->uri_end - r->uri_start; |
| } |
| |
| ngx_test_null(r->uri.data, ngx_palloc(r->pool, r->uri.len + 1), |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| |
| ngx_cpystrn(r->uri.data, r->uri_start, r->uri.len + 1); |
| |
| r->request_line.len = r->request_end - r->request_start; |
| |
| /* if the large client headers are enabled then |
| we need to copy a request line */ |
| |
| if (ngx_http_large_client_header) { |
| ngx_test_null(r->request_line.data, |
| ngx_palloc(r->pool, r->request_line.len + 1), |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| |
| ngx_cpystrn(r->request_line.data, r->request_start, |
| r->request_line.len + 1); |
| |
| } else { |
| r->request_line.data = r->request_start; |
| r->request_line.data[r->request_line.len] = '\0'; |
| } |
| |
| /* copy URI extention if it exists */ |
| |
| if (r->uri_ext) { |
| if (r->args_start) { |
| r->exten.len = r->args_start - 1 - r->uri_ext; |
| } else { |
| r->exten.len = r->uri_end - r->uri_ext; |
| } |
| |
| ngx_test_null(r->exten.data, |
| ngx_palloc(r->pool, r->exten.len + 1), |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| |
| ngx_cpystrn(r->exten.data, r->uri_ext, r->exten.len + 1); |
| } |
| |
| /* copy URI arguments if they exist */ |
| |
| if (r->args_start && r->uri_end > r->args_start) { |
| r->args.len = r->uri_end - r->args_start; |
| |
| ngx_test_null(r->args.data, |
| ngx_palloc(r->pool, r->args.len + 1), |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| |
| ngx_cpystrn(r->args.data, r->args_start, r->args.len + 1); |
| } |
| |
| #if 1 |
| if (r->exten.data == NULL) { |
| r->exten.data = ""; |
| } |
| if (r->args.data == NULL) { |
| r->args.data = ""; |
| } |
| ngx_log_debug(r->connection->log, "HTTP: %d, %d, '%s', '%s', '%s'" _ |
| r->method _ r->http_version _ |
| r->uri.data _ r->exten.data _ r->args.data); |
| if (r->exten.data[0] == '\0') { |
| r->exten.data = NULL; |
| } |
| if (r->args.data[0] == '\0') { |
| r->args.data = NULL; |
| } |
| #endif |
| |
| lcx = r->connection->log->data; |
| |
| if (ngx_http_url_in_error_log) { |
| ngx_test_null(lcx->url, |
| ngx_palloc(r->pool, r->uri_end - r->uri_start + 1), |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| |
| ngx_cpystrn(lcx->url, r->uri_start, r->uri_end - r->uri_start + 1); |
| } |
| |
| /* if we need to parse the headers then return NGX_AGAIN |
| becuase of HTTP/0.9 has no headers so return NGX_OK */ |
| |
| if (r->http_version == NGX_HTTP_VERSION_9) { |
| r->state_handler = NULL; |
| return NGX_OK; |
| } |
| |
| r->headers_in.headers = ngx_create_table(r->pool, 10); |
| |
| r->state_handler = ngx_http_process_request_headers; |
| lcx->action = "reading client request headers"; |
| |
| if (ngx_http_large_client_header |
| && r->header_in->pos == r->header_in->last) |
| { |
| r->header_in->pos = r->header_in->last = r->header_in->start; |
| } |
| |
| return NGX_AGAIN; |
| |
| /* there was error while a request line parsing */ |
| |
| } else if (rc != NGX_AGAIN) { |
| ngx_http_header_parse_error(r, rc); |
| return NGX_HTTP_BAD_REQUEST; |
| } |
| |
| /* NGX_AGAIN: a request line parsing is still not complete */ |
| |
| if (r->header_in->last == r->header_in->end) { |
| |
| /* If it's a pipelined request and a request line is not complete |
| then we need to copy it to the start of r->header_in hunk. |
| We need to copy it here only if the large client headers |
| are enabled otherwise a request line had been already copied |
| to the start of r->header_in hunk in ngx_http_set_keepalive() */ |
| |
| if (ngx_http_large_client_header) { |
| offset = r->request_start - r->header_in->start; |
| |
| if (offset == 0) { |
| ngx_http_header_parse_error(r, NGX_HTTP_PARSE_TOO_LONG_URI); |
| return NGX_HTTP_REQUEST_URI_TOO_LARGE; |
| } |
| |
| ngx_memcpy(r->header_in->start, r->request_start, |
| r->header_in->last - r->request_start); |
| |
| r->header_in->pos -= offset; |
| r->header_in->last -= offset; |
| r->request_start = r->header_in->start; |
| r->request_end -= offset; |
| r->uri_start -= offset; |
| r->uri_end -= offset; |
| if (r->uri_ext) { |
| r->uri_ext -= offset; |
| } |
| if (r->args_start) { |
| r->args_start -= offset; |
| } |
| |
| } else { |
| ngx_http_header_parse_error(r, NGX_HTTP_PARSE_TOO_LONG_URI); |
| return NGX_HTTP_REQUEST_URI_TOO_LARGE; |
| } |
| } |
| |
| return NGX_AGAIN; |
| } |
| |
| |
| static int ngx_http_process_request_headers(ngx_http_request_t *r) |
| { |
| int rc, offset; |
| size_t len; |
| ngx_http_log_ctx_t *ctx; |
| |
| for ( ;; ) { |
| rc = ngx_read_http_header_line(r, r->header_in); |
| |
| /* a header line has been parsed successfully */ |
| |
| if (rc == NGX_OK) { |
| if (ngx_http_process_request_header_line(r) == NGX_ERROR) { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| if (ngx_http_large_client_header |
| && r->header_in->pos == r->header_in->last) |
| { |
| r->header_in->pos = r->header_in->last = r->header_in->start; |
| } |
| |
| return NGX_AGAIN; |
| |
| /* a whole header has been parsed successfully */ |
| |
| } else if (rc == NGX_HTTP_PARSE_HEADER_DONE) { |
| ngx_log_debug(r->connection->log, "HTTP header done"); |
| |
| if (r->headers_in.host) { |
| for (len = 0; len < r->headers_in.host->value.len; len++) { |
| if (r->headers_in.host->value.data[len] == ':') { |
| break; |
| } |
| } |
| r->headers_in.host_name_len = len; |
| |
| } else { |
| if (r->http_version > NGX_HTTP_VERSION_10) { |
| ngx_http_header_parse_error(r, |
| NGX_HTTP_PARSE_NO_HOST_HEADER); |
| return NGX_HTTP_BAD_REQUEST; |
| } |
| r->headers_in.host_name_len = 0; |
| } |
| |
| r->state_handler = NULL; |
| return NGX_OK; |
| |
| /* there was error while a header line parsing */ |
| |
| } else if (rc != NGX_AGAIN) { |
| ngx_http_header_parse_error(r, rc); |
| return NGX_HTTP_BAD_REQUEST; |
| } |
| |
| /* NGX_AGAIN: a header line parsing is still not complete */ |
| |
| if (r->header_in->last == r->header_in->end) { |
| |
| /* if the large client headers are enabled then |
| we need to compact r->header_in hunk */ |
| |
| if (ngx_http_large_client_header) { |
| offset = r->header_name_start - r->header_in->start; |
| |
| if (offset == 0) { |
| ngx_http_header_parse_error(r, |
| NGX_HTTP_PARSE_TOO_LONG_HEADER); |
| return NGX_HTTP_BAD_REQUEST; |
| } |
| |
| ngx_memcpy(r->header_in->start, r->header_name_start, |
| r->header_in->last - r->header_name_start); |
| |
| r->header_in->last -= offset; |
| r->header_in->pos -= offset; |
| r->header_name_start = r->header_in->start; |
| r->header_name_end -= offset; |
| r->header_start -= offset; |
| r->header_end -= offset; |
| |
| } else { |
| ngx_http_header_parse_error(r, NGX_HTTP_PARSE_TOO_LONG_HEADER); |
| return NGX_HTTP_BAD_REQUEST; |
| } |
| |
| } |
| |
| return NGX_AGAIN; |
| } |
| } |
| |
| |
| static int ngx_http_process_request_header_line(ngx_http_request_t *r) |
| { |
| int i; |
| ngx_table_elt_t *h; |
| |
| ngx_test_null(h, ngx_push_table(r->headers_in.headers), NGX_ERROR); |
| |
| h->key.len = r->header_name_end - r->header_name_start; |
| h->value.len = r->header_end - r->header_start; |
| |
| /* if the large client headers are enabled then |
| we need to copy the header name and value */ |
| |
| if (ngx_http_large_client_header) { |
| ngx_test_null(h->key.data, ngx_palloc(r->pool, h->key.len + 1), |
| NGX_ERROR); |
| ngx_test_null(h->value.data, ngx_palloc(r->pool, h->value.len + 1), |
| NGX_ERROR); |
| ngx_cpystrn(h->key.data, r->header_name_start, h->key.len + 1); |
| ngx_cpystrn(h->value.data, r->header_start, h->value.len + 1); |
| |
| } else { |
| h->key.data = r->header_name_start; |
| h->key.data[h->key.len] = '\0'; |
| h->value.data = r->header_start; |
| h->value.data[h->value.len] = '\0'; |
| } |
| |
| for (i = 0; headers_in[i].name.len != 0; i++) { |
| if (headers_in[i].name.len != h->key.len) { |
| continue; |
| } |
| |
| if (ngx_strcasecmp(headers_in[i].name.data, h->key.data) == 0) { |
| *((ngx_table_elt_t **) |
| ((char *) &r->headers_in + headers_in[i].offset)) = h; |
| } |
| } |
| |
| ngx_log_debug(r->connection->log, "HTTP header: '%s: %s'" _ |
| h->key.data _ h->value.data); |
| |
| return NGX_OK; |
| } |
| |
| |
| int ngx_http_finalize_request(ngx_http_request_t *r, int error) |
| { |
| int rc, event; |
| ngx_msec_t timeout; |
| ngx_event_t *rev, *wev; |
| ngx_http_core_loc_conf_t *lcf; |
| |
| rc = error; |
| |
| if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { |
| |
| rev = r->connection->read; |
| |
| if (rev->timer_set) { |
| ngx_del_timer(rev); |
| } else { |
| rev->timer_set = 1; |
| } |
| |
| rc = ngx_http_special_response_handler(r, rc); |
| } |
| |
| /* a handler has done its work completely */ |
| |
| if (rc == NGX_OK) { |
| |
| if (r->keepalive != 0) { |
| return ngx_http_set_keepalive(r); |
| } |
| |
| if (r->lingering_close) { |
| return ngx_http_set_lingering_close(r); |
| } |
| |
| return ngx_http_close_request(r, 0); |
| } |
| |
| /* NGX_AGAIN: a handler has done its work |
| but the transfer is still not completed */ |
| |
| wev = r->connection->write; |
| wev->event_handler = ngx_http_writer; |
| |
| if (wev->delayed && wev->ready) { |
| return NGX_AGAIN; |
| } |
| |
| lcf = (ngx_http_core_loc_conf_t *) |
| ngx_http_get_module_loc_conf(r->main ? r->main : r, |
| ngx_http_core_module_ctx); |
| ngx_add_timer(wev, lcf->send_timeout); |
| wev->timer_set = 1; |
| |
| #if (USE_KQUEUE) |
| |
| #if (HAVE_LOWAT_EVENT) /* kqueue's NOTE_LOWAT */ |
| wev->lowat = lcf->send_lowat; |
| #endif |
| |
| if (ngx_add_event(wev, NGX_WRITE_EVENT, NGX_CLEAR_EVENT) == NGX_ERROR) { |
| return ngx_http_close_request(r, 0); |
| } |
| |
| return rc; |
| |
| #else |
| |
| /* aio, iocp, epoll */ |
| |
| if (ngx_event_flags & (NGX_HAVE_AIO_EVENT|NGX_HAVE_EDGE_EVENT)) { |
| return rc; |
| } |
| |
| #if (HAVE_LOWAT_EVENT) /* kqueue's NOTE_LOWAT */ |
| |
| if (ngx_event_flags & NGX_HAVE_LOWAT_EVENT) { |
| wev->lowat = lcf->send_lowat; |
| } |
| |
| #endif |
| |
| /* kqueue */ |
| |
| if (ngx_event_flags & NGX_HAVE_CLEAR_EVENT) { |
| event = NGX_CLEAR_EVENT; |
| |
| /* select, poll, /dev/poll */ |
| |
| } else { |
| event = NGX_LEVEL_EVENT; |
| } |
| |
| if (ngx_add_event(wev, NGX_WRITE_EVENT, event) == NGX_ERROR) { |
| return ngx_http_close_request(r, 0); |
| } |
| |
| return rc; |
| |
| #endif /* USE_KQUEUE */ |
| } |
| |
| |
| static int ngx_http_writer(ngx_event_t *wev) |
| { |
| int rc; |
| ngx_msec_t timeout; |
| ngx_connection_t *c; |
| ngx_http_request_t *r; |
| ngx_http_core_loc_conf_t *lcf; |
| |
| c = (ngx_connection_t *) wev->data; |
| r = (ngx_http_request_t *) c->data; |
| |
| rc = ngx_http_output_filter(r, NULL); |
| |
| ngx_log_debug(c->log, "output filter in writer: %d" _ rc); |
| |
| if (rc == NGX_AGAIN) { |
| |
| lcf = (ngx_http_core_loc_conf_t *) |
| ngx_http_get_module_loc_conf(r->main ? r->main : r, |
| ngx_http_core_module_ctx); |
| if (wev->timer_set) { |
| ngx_del_timer(wev); |
| } else { |
| wev->timer_set = 1; |
| } |
| |
| ngx_add_timer(wev, lcf->send_timeout); |
| |
| return rc; |
| } |
| |
| if (rc == NGX_ERROR) |
| return rc; |
| |
| /* rc == NGX_OK */ |
| |
| ngx_log_debug(c->log, "http writer done"); |
| |
| if (r->keepalive != 0) { |
| return ngx_http_set_keepalive(r); |
| } |
| |
| if (r->lingering_close) { |
| return ngx_http_set_lingering_close(r); |
| } |
| |
| return ngx_http_close_request(r, 0); |
| } |
| |
| |
| static int ngx_http_block_read(ngx_event_t *ev) |
| { |
| ngx_log_debug(ev->log, "http read blocked"); |
| |
| /* aio does not call this handler */ |
| |
| #if (USE_KQUEUE) |
| |
| return NGX_OK; |
| |
| #else |
| |
| if (ngx_event_flags & NGX_USE_LEVEL_EVENT) { /* select, poll, /dev/poll */ |
| ev->blocked = 1; |
| return ngx_del_event(ev, NGX_READ_EVENT, 0); |
| |
| } else { /* kqueue, epoll */ |
| return NGX_OK; |
| } |
| |
| #endif /* USE_KQUEUE */ |
| } |
| |
| |
| /* TODO */ |
| int ngx_http_discard_body(ngx_http_request_t *r) |
| { |
| ngx_event_t *ev; |
| |
| ev = r->connection->read; |
| |
| ngx_log_debug(r->connection->log, "set discard body"); |
| |
| if (ev->timer_set) { |
| ngx_del_timer(ev); |
| ev->timer_set = 0; |
| } |
| |
| if (r->client_content_length) { |
| ev->event_handler = ngx_http_read_discarded_body; |
| /* if blocked - read */ |
| /* else add timer */ |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| /* TODO */ |
| static int ngx_http_read_discarded_body(ngx_event_t *ev) |
| { |
| size_t size; |
| ssize_t n; |
| ngx_connection_t *c; |
| ngx_http_request_t *r; |
| ngx_http_core_loc_conf_t *lcf; |
| |
| ngx_log_debug(ev->log, "http read discarded body"); |
| |
| if (ev->timedout) { |
| return NGX_ERROR; |
| } |
| |
| c = (ngx_connection_t *) ev->data; |
| r = (ngx_http_request_t *) c->data; |
| |
| lcf = (ngx_http_core_loc_conf_t *) |
| ngx_http_get_module_loc_conf(r, ngx_http_core_module_ctx); |
| |
| if (r->discarded_buffer == NULL) { |
| ngx_test_null(r->discarded_buffer, |
| ngx_palloc(r->pool, lcf->discarded_buffer_size), |
| NGX_ERROR); |
| } |
| |
| size = r->client_content_length; |
| if (size > lcf->discarded_buffer_size) { |
| size = lcf->discarded_buffer_size; |
| } |
| |
| n = ngx_event_recv(c, r->discarded_buffer, size); |
| if (n == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| if (n == NGX_AGAIN) { |
| return NGX_OK; |
| } |
| |
| r->client_content_length -= n; |
| /* XXX: what if r->client_content_length == 0 ? */ |
| return NGX_OK; |
| } |
| |
| |
| static int ngx_http_set_keepalive(ngx_http_request_t *r) |
| { |
| int len, blocked; |
| ngx_hunk_t *h; |
| ngx_event_t *rev, *wev; |
| ngx_connection_t *c; |
| ngx_http_log_ctx_t *ctx; |
| |
| c = (ngx_connection_t *) r->connection; |
| rev = c->read; |
| |
| ctx = (ngx_http_log_ctx_t *) c->log->data; |
| ctx->action = "closing request"; |
| ngx_http_close_request(r, 0); |
| |
| if (rev->blocked && (ngx_event_flags & NGX_USE_LEVEL_EVENT)) { |
| if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| blocked = 1; |
| rev->blocked = 0; |
| |
| } else { |
| blocked = 0; |
| } |
| |
| h = c->buffer; |
| |
| /* pipelined request */ |
| if (h->pos < h->last) { |
| |
| /* We do not know here whether a pipelined request is complete |
| so if the large client headers are not enabled |
| we need to copy the data to the start of c->buffer. |
| This copy should be rare because clients that support |
| pipelined requests (Mozilla 1.x, Opera 6.x) are still rare */ |
| |
| if (!ngx_http_large_client_header) { |
| len = h->last - h->pos; |
| ngx_memcpy(h->start, h->pos, len); |
| h->pos = h->start; |
| h->last = h->start + len; |
| } |
| |
| c->pipeline = 1; |
| ctx->action = "reading client pipelined request line"; |
| return ngx_http_init_request(rev); |
| } |
| |
| c->pipeline = 0; |
| |
| h->pos = h->last = h->start; |
| rev->event_handler = ngx_http_keepalive_handler; |
| wev = c->write; |
| |
| if (wev->active && (ngx_event_flags & NGX_USE_LEVEL_EVENT)) { |
| if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| } |
| |
| ctx->action = "keepalive"; |
| |
| #if (HAVE_AIO_EVENT) /* aio, iocp */ |
| |
| if ((ngx_event_flags & NGX_HAVE_AIO_EVENT) || blocked) { |
| return ngx_http_keepalive_handler(rev); |
| } |
| |
| #else |
| |
| if (blocked) { |
| return ngx_http_keepalive_handler(rev); |
| } |
| |
| #endif |
| |
| return NGX_OK; |
| } |
| |
| |
| static int ngx_http_keepalive_handler(ngx_event_t *rev) |
| { |
| ssize_t n; |
| ngx_connection_t *c; |
| ngx_http_log_ctx_t *lctx; |
| |
| c = (ngx_connection_t *) rev->data; |
| |
| ngx_log_debug(c->log, "http keepalive handler"); |
| |
| if (rev->timedout) { |
| return NGX_ERROR; /* to close connection */ |
| } |
| |
| /* MSIE closes a keepalive connection with RST flag |
| so we ignore ECONNRESET here */ |
| |
| rev->ignore_econnreset = 1; |
| ngx_set_socket_errno(0); |
| n = ngx_event_recv(c, c->buffer->last, c->buffer->end - c->buffer->last); |
| rev->ignore_econnreset = 0; |
| |
| if (n == NGX_AGAIN || n == NGX_ERROR) { |
| return n; |
| } |
| |
| lctx = (ngx_http_log_ctx_t *) rev->log->data; |
| rev->log->handler = NULL; |
| |
| if (n == 0) { |
| ngx_log_error(NGX_LOG_INFO, c->log, ngx_socket_errno, |
| "client %s closed keepalive connection", lctx->client); |
| return NGX_ERROR; /* to close connection */ |
| } |
| |
| c->buffer->last += n; |
| rev->log->handler = ngx_http_log_error; |
| lctx->action = "reading client request line"; |
| |
| return ngx_http_init_request(rev); |
| } |
| |
| |
| static int ngx_http_set_lingering_close(ngx_http_request_t *r) |
| { |
| ngx_event_t *rev; |
| ngx_connection_t *c; |
| ngx_http_core_loc_conf_t *lcf; |
| |
| c = r->connection; |
| rev = c->read; |
| |
| lcf = (ngx_http_core_loc_conf_t *) |
| ngx_http_get_module_loc_conf(r, ngx_http_core_module_ctx); |
| |
| r->lingering_time = ngx_time() + lcf->lingering_time / 1000; |
| r->connection->read->event_handler = ngx_http_lingering_close_handler; |
| |
| if (rev->timer_set) { |
| ngx_del_timer(rev); |
| } else { |
| rev->timer_set = 1; |
| } |
| |
| ngx_add_timer(rev, lcf->lingering_timeout); |
| |
| if (rev->blocked && (ngx_event_flags & NGX_USE_LEVEL_EVENT)) { |
| if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT) == NGX_ERROR) { |
| return ngx_http_close_request(r, 0); |
| } |
| rev->blocked = 0; |
| } |
| |
| #if !(USE_KQUEUE) |
| |
| if (c->write->active && (ngx_event_flags & NGX_USE_LEVEL_EVENT)) { |
| if (ngx_del_event(c->write, NGX_WRITE_EVENT, 0) == NGX_ERROR) { |
| return ngx_http_close_request(r, 0); |
| } |
| } |
| |
| #endif |
| |
| if (ngx_shutdown_socket(c->fd, NGX_WRITE_SHUTDOWN) == -1) { |
| ngx_log_error(NGX_LOG_CRIT, c->log, ngx_socket_errno, |
| ngx_shutdown_socket_n " failed"); |
| return ngx_http_close_request(r, 0); |
| } |
| |
| #if (USE_KQUEUE) |
| |
| if (rev->ready) { |
| return ngx_http_lingering_close_handler(rev); |
| } |
| |
| #else |
| |
| if (rev->ready || (ngx_event_flags & NGX_HAVE_AIO_EVENT)) { |
| return ngx_http_lingering_close_handler(rev); |
| } |
| |
| #endif |
| |
| return NGX_OK; |
| } |
| |
| |
| static int ngx_http_lingering_close_handler(ngx_event_t *rev) |
| { |
| ssize_t n; |
| ngx_msec_t timer; |
| ngx_connection_t *c; |
| ngx_http_request_t *r; |
| ngx_http_core_loc_conf_t *lcf; |
| |
| c = (ngx_connection_t *) rev->data; |
| r = (ngx_http_request_t *) c->data; |
| |
| ngx_log_debug(c->log, "http lingering close handler"); |
| |
| if (rev->timedout) { |
| return ngx_http_close_request(r, 0); |
| } |
| |
| timer = r->lingering_time - ngx_time(); |
| if (timer <= 0) { |
| return ngx_http_close_request(r, 0); |
| } |
| |
| lcf = (ngx_http_core_loc_conf_t *) |
| ngx_http_get_module_loc_conf(r, ngx_http_core_module_ctx); |
| |
| if (r->discarded_buffer == NULL) { |
| |
| /* TODO: r->header_in->start (if large headers are enabled) |
| or the end of parsed header (otherwise) |
| instead of r->header_in->last */ |
| |
| if ((size_t)(r->header_in->end - r->header_in->last) |
| >= lcf->discarded_buffer_size) { |
| r->discarded_buffer = r->header_in->last; |
| |
| } else { |
| ngx_test_null(r->discarded_buffer, |
| ngx_palloc(c->pool, lcf->discarded_buffer_size), |
| ngx_http_close_request(r, 0)); |
| } |
| } |
| |
| do { |
| n = ngx_event_recv(c, r->discarded_buffer, lcf->discarded_buffer_size); |
| |
| ngx_log_debug(c->log, "lingering read: %d" _ n); |
| |
| if (n == NGX_ERROR || n == 0) { |
| return ngx_http_close_request(r, 0); |
| } |
| |
| } while (rev->ready); |
| |
| timer *= 1000; |
| if (timer > lcf->lingering_timeout) { |
| timer = lcf->lingering_timeout; |
| } |
| |
| if (rev->timer_set) { |
| ngx_del_timer(rev); |
| } else { |
| rev->timer_set = 1; |
| } |
| ngx_add_timer(rev, timer); |
| |
| return NGX_OK; |
| } |
| |
| |
| static int ngx_http_close_connection(ngx_event_t *ev) |
| { |
| return ngx_event_close_connection(ev); |
| } |
| |
| |
| static void ngx_http_header_parse_error(ngx_http_request_t *r, int parse_err) |
| { |
| ngx_http_log_ctx_t *ctx; |
| |
| ctx = r->connection->log->data; |
| r->connection->log->handler = NULL; |
| |
| if (ctx->url) { |
| ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| header_errors[parse_err - NGX_HTTP_PARSE_INVALID_METHOD], |
| ctx->client, ctx->url); |
| |
| } else { |
| ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| header_errors[parse_err - NGX_HTTP_PARSE_INVALID_METHOD], |
| ctx->client); |
| } |
| |
| r->connection->log->handler = ngx_http_log_error; |
| } |
| |
| |
| static size_t ngx_http_log_error(void *data, char *buf, size_t len) |
| { |
| ngx_http_log_ctx_t *ctx = (ngx_http_log_ctx_t *) data; |
| |
| if (ctx->url) { |
| return ngx_snprintf(buf, len, " while %s, client: %s, URL: %s", |
| ctx->action, ctx->client, ctx->url); |
| } else { |
| return ngx_snprintf(buf, len, " while %s, client: %s", |
| ctx->action, ctx->client); |
| } |
| } |
