Mercurial > hg > nginx-mail
diff src/http/ngx_http_request.c @ 0:f0b350454894 NGINX_0_1_0
nginx 0.1.0
*) The first public version.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Mon, 04 Oct 2004 00:00:00 +0400 |
parents | |
children | cc9f381affaa |
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new file mode 100644 --- /dev/null +++ b/src/http/ngx_http_request.c @@ -0,0 +1,2149 @@ + +/* + * Copyright (C) Igor Sysoev + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_event.h> +#include <ngx_http.h> + + +static void ngx_http_init_request(ngx_event_t *ev); +#if (NGX_HTTP_SSL) +static void ngx_http_ssl_handshake(ngx_event_t *rev); +#endif +static void ngx_http_process_request_line(ngx_event_t *rev); +static void ngx_http_process_request_headers(ngx_event_t *rev); +static ssize_t ngx_http_read_request_header(ngx_http_request_t *r); +static ngx_int_t ngx_http_alloc_large_header_buffer(ngx_http_request_t *r, + ngx_uint_t request_line); +static ngx_int_t ngx_http_process_request_header(ngx_http_request_t *r); + +static void ngx_http_set_write_handler(ngx_http_request_t *r); + +static void ngx_http_block_read(ngx_event_t *ev); +static void ngx_http_read_discarded_body_event(ngx_event_t *rev); +static ngx_int_t ngx_http_read_discarded_body(ngx_http_request_t *r); + +static void ngx_http_set_keepalive(ngx_http_request_t *r); +static void ngx_http_keepalive_handler(ngx_event_t *ev); +static void ngx_http_set_lingering_close(ngx_http_request_t *r); +static void ngx_http_lingering_close_handler(ngx_event_t *ev); + +static void ngx_http_client_error(ngx_http_request_t *r, + int client_error, int error); +static size_t ngx_http_log_error(void *data, char *buf, size_t len); + + +/* NGX_HTTP_PARSE_... errors */ + +static char *client_header_errors[] = { + "client %s sent invalid method", + "client %s sent invalid request", + "client %s sent too long URI", + "client %s sent invalid 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", + "client %s sent invalid \"Content-Length\" header, URL: %s", + "client %s sent POST method without \"Content-Length\" header, URL: %s", + "client %s sent plain HTTP request to HTTPS port, URL: %s", + "client %s sent invalid \"Host\" header \"%s\", URL: %s" +}; + + +ngx_http_header_t ngx_http_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_string("Referer"), offsetof(ngx_http_headers_in_t, referer) }, + { ngx_string("Content-Length"), + offsetof(ngx_http_headers_in_t, content_length) }, + + { ngx_string("Range"), offsetof(ngx_http_headers_in_t, range) }, +#if 0 + { ngx_string("If-Range"), offsetof(ngx_http_headers_in_t, if_range) }, +#endif + +#if (NGX_HTTP_GZIP) + { ngx_string("Accept-Encoding"), + offsetof(ngx_http_headers_in_t, accept_encoding) }, + { ngx_string("Via"), offsetof(ngx_http_headers_in_t, via) }, +#endif + + { ngx_string("Authorization"), + offsetof(ngx_http_headers_in_t, authorization) }, + + { ngx_string("Keep-Alive"), offsetof(ngx_http_headers_in_t, keep_alive) }, + +#if (NGX_HTTP_PROXY) + { ngx_string("X-Forwarded-For"), + offsetof(ngx_http_headers_in_t, x_forwarded_for) }, +#endif + + { ngx_null_string, 0 } +}; + + +#if 0 +static void ngx_http_dummy(ngx_event_t *wev) +{ + return; +} +#endif + + +void ngx_http_init_connection(ngx_connection_t *c) +{ + ngx_event_t *rev; + ngx_http_log_ctx_t *ctx; + + if (!(ctx = ngx_pcalloc(c->pool, sizeof(ngx_http_log_ctx_t)))) { + ngx_http_close_connection(c); + return; + } + + ctx->connection = c->number; + ctx->client = c->addr_text.data; + ctx->action = "reading client request line"; + c->log->data = ctx; + c->log->handler = ngx_http_log_error; + c->log_error = NGX_ERROR_INFO; + + rev = c->read; + rev->event_handler = ngx_http_init_request; + + /* STUB: epoll edge */ c->write->event_handler = ngx_http_empty_handler; + + if (rev->ready) { + /* the deferred accept(), rtsig, aio, iocp */ + + if (ngx_accept_mutex) { + if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) { + ngx_http_close_connection(c); + return; + } + + ngx_post_event(rev); + + ngx_mutex_unlock(ngx_posted_events_mutex); + return; + } + +#if (NGX_STAT_STUB) + (*ngx_stat_reading)++; +#endif + + ngx_http_init_request(rev); + return; + } + + ngx_add_timer(rev, c->listening->post_accept_timeout); + + if (ngx_handle_read_event(rev, 0) == NGX_ERROR) { + ngx_http_close_connection(c); + return; + } + +#if 0 + /* TODO: learn SO_SNDBUF (to use in zerocopy) via kqueue's EV_CLEAR event */ + + c->write->ready = 0; + c->write->event_handler = ngx_http_dummy; + + if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) { + ngx_http_close_connection(c); + return; + } +#endif + +#if (NGX_STAT_STUB) + (*ngx_stat_reading)++; +#endif + +} + + +static void ngx_http_init_request(ngx_event_t *rev) +{ + ngx_uint_t i; + socklen_t len; + struct sockaddr_in addr_in; + ngx_connection_t *c; + ngx_http_request_t *r; + ngx_http_in_port_t *in_port; + ngx_http_in_addr_t *in_addr; + ngx_http_connection_t *hc; + ngx_http_server_name_t *server_name; + ngx_http_core_srv_conf_t *cscf; + ngx_http_core_loc_conf_t *clcf; +#if (NGX_HTTP_SSL) + ngx_http_ssl_srv_conf_t *sscf; +#endif + + c = rev->data; + + if (rev->timedout) { + ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); + +#if (NGX_STAT_STUB) + (*ngx_stat_reading)--; +#endif + + ngx_http_close_connection(c); + return; + } + + hc = c->data; + + if (hc) { + +#if (NGX_STAT_STUB) + (*ngx_stat_reading)++; +#endif + + } else { + if (!(hc = ngx_pcalloc(c->pool, sizeof(ngx_http_connection_t)))) { + +#if (NGX_STAT_STUB) + (*ngx_stat_reading)--; +#endif + + ngx_http_close_connection(c); + return; + } + } + + r = hc->request; + + if (r) { + ngx_memzero(r, sizeof(ngx_http_request_t)); + + r->pipeline = hc->pipeline; + + if (hc->nbusy) { + r->header_in = hc->busy[0]; + } + + } else { + if (!(r = ngx_pcalloc(c->pool, sizeof(ngx_http_request_t)))) { + +#if (NGX_STAT_STUB) + (*ngx_stat_reading)--; +#endif + + ngx_http_close_connection(c); + return; + } + + hc->request = r; + } + +#if (NGX_STAT_STUB) + r->stat_reading = 1; +#endif + + c->data = r; + r->http_connection = hc; + + c->sent = 0; + r->signature = NGX_HTTP_MODULE; + + /* find the server configuration for the address:port */ + + /* AF_INET only */ + + in_port = c->servers; + in_addr = in_port->addrs.elts; + + r->port = in_port->port; + r->port_text = &in_port->port_text; + + i = 0; + + if (in_port->addrs.nelts > 1) { + + /* + * There are several addresses on this port and one of them + * is the "*:port" wildcard so getsockname() is needed to determine + * the server address. + * + * AcceptEx() already gave this address. + */ + +#if (WIN32) + if (c->local_sockaddr) { + r->in_addr = + ((struct sockaddr_in *) c->local_sockaddr)->sin_addr.s_addr; + + } else { +#endif + len = sizeof(struct sockaddr_in); + if (getsockname(c->fd, (struct sockaddr *) &addr_in, &len) == -1) { + ngx_connection_error(c, ngx_socket_errno, + "getsockname() failed"); + ngx_http_close_connection(c); + return; + } + + r->in_addr = addr_in.sin_addr.s_addr; + +#if (WIN32) + } +#endif + + /* the last in_port->addrs address is "*" */ + + for ( /* void */ ; i < in_port->addrs.nelts - 1; i++) { + if (in_addr[i].addr == r->in_addr) { + break; + } + } + + } else { + r->in_addr = in_addr[0].addr; + } + + r->virtual_names = &in_addr[i].names; + + /* the default server configuration for the address:port */ + cscf = in_addr[i].core_srv_conf; + + r->main_conf = cscf->ctx->main_conf; + r->srv_conf = cscf->ctx->srv_conf; + r->loc_conf = cscf->ctx->loc_conf; + + rev->event_handler = ngx_http_process_request_line; + +#if (NGX_HTTP_SSL) + + sscf = ngx_http_get_module_srv_conf(r, ngx_http_ssl_module); + if (sscf->enable) { + + if (c->ssl == NULL) { + if (ngx_ssl_create_session(sscf->ssl_ctx, c, NGX_SSL_BUFFER) + == NGX_ERROR) + { + ngx_http_close_connection(c); + return; + } + + /* + * The majority of browsers do not send the "close notify" alert. + * Among them are MSIE, Mozilla, Netscape 4, Konqueror, and Links. + * And what is more MSIE ignores the server's alert. + * + * Opera always sends the alert. + */ + + c->ssl->no_rcv_shut = 1; + rev->event_handler = ngx_http_ssl_handshake; + } + + r->filter_need_in_memory = 1; + } + +#endif + + server_name = cscf->server_names.elts; + r->server_name = &server_name->name; + + clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); + c->log->file = clcf->err_log->file; + if (!(c->log->log_level & NGX_LOG_DEBUG_CONNECTION)) { + c->log->log_level = clcf->err_log->log_level; + } + + if (c->buffer == NULL) { + c->buffer = ngx_create_temp_buf(c->pool, + cscf->client_header_buffer_size); + if (c->buffer == NULL) { + ngx_http_close_connection(c); + return; + } + } + + if (r->header_in == NULL) { + r->header_in = c->buffer; + } + + if (!(r->pool = ngx_create_pool(cscf->request_pool_size, c->log))) { + ngx_http_close_connection(c); + return; + } + + if (ngx_array_init(&r->cleanup, r->pool, 5, sizeof(ngx_http_cleanup_t)) + == NGX_ERROR) + { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(c); + return; + } + + + if (ngx_list_init(&r->headers_out.headers, r->pool, 20, + sizeof(ngx_table_elt_t)) == NGX_ERROR) + { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(c); + return; + } + + + r->ctx = ngx_pcalloc(r->pool, sizeof(void *) * ngx_http_max_module); + if (r->ctx == NULL) { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(c); + return; + } + + c->single_connection = 1; + r->connection = c; + + r->file.fd = NGX_INVALID_FILE; + + r->headers_in.content_length_n = -1; + r->headers_in.keep_alive_n = -1; + r->headers_out.content_length_n = -1; + r->headers_out.last_modified_time = -1; + + r->http_state = NGX_HTTP_READING_REQUEST_STATE; + +#if (NGX_STAT_STUB) + (*ngx_stat_requests)++; +#endif + + rev->event_handler(rev); +} + + +#if (NGX_HTTP_SSL) + +static void ngx_http_ssl_handshake(ngx_event_t *rev) +{ + int n; + ngx_int_t rc; + u_char buf[1]; + ngx_connection_t *c; + ngx_http_request_t *r; + + c = rev->data; + r = c->data; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, + "http check ssl handshake"); + + if (rev->timedout) { + ngx_http_client_error(r, 0, NGX_HTTP_REQUEST_TIME_OUT); + return; + } + + n = recv(c->fd, buf, 1, MSG_PEEK); + + if (n == -1 && ngx_socket_errno == NGX_EAGAIN) { + return; + } + + if (n == 1) { + if (buf[0] == 0x80 /* SSLv2 */ || buf[0] == 0x16 /* SSLv3/TLSv1 */) { + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, rev->log, 0, + "https ssl handshake: 0x%X", buf[0]); + + c->recv = ngx_ssl_recv; + c->send_chain = ngx_ssl_send_chain; + + rc = ngx_ssl_handshake(c); + + if (rc == NGX_ERROR) { + ngx_http_close_request(r, NGX_HTTP_BAD_REQUEST); + ngx_http_close_connection(r->connection); + return; + } + + if (rc != NGX_OK) { + return; + } + + } else { + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, + "plain http"); + + r->plain_http = 1; + } + } + + rev->event_handler = ngx_http_process_request_line; + ngx_http_process_request_line(rev); +} + +#endif + + +static void ngx_http_process_request_line(ngx_event_t *rev) +{ + u_char *p; + ssize_t n; + ngx_int_t rc, rv; + ngx_connection_t *c; + ngx_http_request_t *r; + ngx_http_log_ctx_t *ctx; + + c = rev->data; + r = c->data; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, + "http process request line"); + + if (rev->timedout) { + ngx_http_client_error(r, 0, NGX_HTTP_REQUEST_TIME_OUT); + return; + } + + rc = NGX_AGAIN; + + for ( ;; ) { + + if (rc == NGX_AGAIN) { + n = ngx_http_read_request_header(r); + + if (n == NGX_AGAIN || n == NGX_ERROR) { + return; + } + } + + rc = ngx_http_parse_request_line(r, r->header_in); + + if (rc == NGX_OK) { + + /* the request line has been parsed successfully */ + + /* copy unparsed URI */ + + r->unparsed_uri.len = r->uri_end - r->uri_start; + r->unparsed_uri.data = ngx_palloc(r->pool, r->unparsed_uri.len + 1); + if (r->unparsed_uri.data == NULL) { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(c); + return; + } + + ngx_cpystrn(r->unparsed_uri.data, r->uri_start, + r->unparsed_uri.len + 1); + + + /* 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; + } + + if (!(r->uri.data = ngx_palloc(r->pool, r->uri.len + 1))) { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(c); + return; + } + + if (r->complex_uri) { + rc = ngx_http_parse_complex_uri(r); + + if (rc == NGX_HTTP_INTERNAL_SERVER_ERROR) { + ngx_http_close_request(r, rc); + ngx_http_close_connection(c); + return; + } + + if (rc != NGX_OK) { + r->request_line.len = r->request_end - r->request_start; + r->request_line.data = r->request_start; + + ngx_http_client_error(r, rc, NGX_HTTP_BAD_REQUEST); + return; + } + + } else { + ngx_cpystrn(r->uri.data, r->uri_start, r->uri.len + 1); + } + + + r->request_line.len = r->request_end - r->request_start; + r->request_line.data = r->request_start; + r->request_line.data[r->request_line.len] = '\0'; + + if (r->method == 0) { + r->method_name.len = r->method_end - r->request_start + 1; + r->method_name.data = r->request_line.data; + } + + if (r->uri_ext) { + + /* copy URI extention */ + + if (r->args_start) { + r->exten.len = r->args_start - 1 - r->uri_ext; + } else { + r->exten.len = r->uri_end - r->uri_ext; + } + + if (!(r->exten.data = ngx_palloc(r->pool, r->exten.len + 1))) { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(c); + return; + } + + ngx_cpystrn(r->exten.data, r->uri_ext, r->exten.len + 1); + } + + if (r->args_start && r->uri_end > r->args_start) { + + /* copy URI arguments */ + + r->args.len = r->uri_end - r->args_start; + + if (!(r->args.data = ngx_palloc(r->pool, r->args.len + 1))) { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(c); + return; + } + + ngx_cpystrn(r->args.data, r->args_start, r->args.len + 1); + } + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http request line: \"%s\"", r->request_line.data); + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http uri: \"%s\"", r->uri.data); + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http args: \"%s\"", + r->args.data ? r->args.data : (u_char *) ""); + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http exten: \"%s\"", + r->exten.data ? r->exten.data : (u_char *) ""); + + if (r->http_version < NGX_HTTP_VERSION_10) { + rev->event_handler = ngx_http_block_read; + ngx_http_handler(r); + return; + } + + + if (ngx_list_init(&r->headers_in.headers, r->pool, 20, + sizeof(ngx_table_elt_t)) == NGX_ERROR) + { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(c); + return; + } + + + if (ngx_array_init(&r->headers_in.cookies, r->pool, 5, + sizeof(ngx_table_elt_t *)) == NGX_ERROR) + { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(c); + return; + } + + + ctx = c->log->data; + ctx->action = "reading client request headers"; + ctx->url = r->unparsed_uri.data; + + rev->event_handler = ngx_http_process_request_headers; + ngx_http_process_request_headers(rev); + + return; + + } else if (rc != NGX_AGAIN) { + + /* there was error while a request line parsing */ + + for (p = r->request_start; p < r->header_in->last; p++) { + if (*p == CR || *p == LF) { + break; + } + } + + r->request_line.len = p - r->request_start; + r->request_line.data = r->request_start; + + if (rc == NGX_HTTP_PARSE_INVALID_METHOD) { + r->http_version = NGX_HTTP_VERSION_10; + } + + ngx_http_client_error(r, rc, + (rc == NGX_HTTP_PARSE_INVALID_METHOD) ? + NGX_HTTP_NOT_IMPLEMENTED: + NGX_HTTP_BAD_REQUEST); + return; + } + + /* NGX_AGAIN: a request line parsing is still incomplete */ + + if (r->header_in->pos == r->header_in->end) { + + rv = ngx_http_alloc_large_header_buffer(r, 1); + + if (rv == NGX_ERROR) { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(c); + return; + } + + if (rv == NGX_DECLINED) { + ngx_http_client_error(r, NGX_HTTP_PARSE_TOO_LONG_URI, + NGX_HTTP_REQUEST_URI_TOO_LARGE); + return; + } + } + } +} + + +static void ngx_http_process_request_headers(ngx_event_t *rev) +{ + ssize_t n; + ngx_int_t rc, rv, i; + ngx_table_elt_t *h, **cookie; + ngx_connection_t *c; + ngx_http_request_t *r; + + c = rev->data; + r = c->data; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, + "http process request header line"); + + if (rev->timedout) { + ngx_http_client_error(r, 0, NGX_HTTP_REQUEST_TIME_OUT); + return; + } + + rc = NGX_AGAIN; + + for ( ;; ) { + + if (rc == NGX_AGAIN) { + + if (r->header_in->pos == r->header_in->end) { + + rv = ngx_http_alloc_large_header_buffer(r, 0); + + if (rv == NGX_ERROR) { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(c); + return; + } + + if (rv == NGX_DECLINED) { + ngx_http_client_error(r, NGX_HTTP_PARSE_TOO_LONG_HEADER, + NGX_HTTP_BAD_REQUEST); + return; + } + } + + n = ngx_http_read_request_header(r); + + if (n == NGX_AGAIN || n == NGX_ERROR) { + return; + } + } + + rc = ngx_http_parse_header_line(r, r->header_in); + + if (rc == NGX_OK) { + + /* a header line has been parsed successfully */ + + r->headers_n++; + + if (!(h = ngx_list_push(&r->headers_in.headers))) { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(c); + return; + } + + h->key.len = r->header_name_end - r->header_name_start; + h->key.data = r->header_name_start; + h->key.data[h->key.len] = '\0'; + + h->value.len = r->header_end - r->header_start; + h->value.data = r->header_start; + h->value.data[h->value.len] = '\0'; + + if (h->key.len == sizeof("Cookie") - 1 + && ngx_strcasecmp(h->key.data, "Cookie") == 0) + { + if (!(cookie = ngx_array_push(&r->headers_in.cookies))) { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(c); + return; + } + + *cookie = h; + + } else { + + for (i = 0; ngx_http_headers_in[i].name.len != 0; i++) { + if (ngx_http_headers_in[i].name.len != h->key.len) { + continue; + } + + if (ngx_strcasecmp(ngx_http_headers_in[i].name.data, + h->key.data) == 0) + { + *((ngx_table_elt_t **) ((char *) &r->headers_in + + ngx_http_headers_in[i].offset)) = h; + break; + } + } + } + + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http header: \"%s: %s\"", + h->key.data, h->value.data); + + continue; + + } else if (rc == NGX_HTTP_PARSE_HEADER_DONE) { + + /* a whole header has been parsed successfully */ + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http header done"); + + r->http_state = NGX_HTTP_PROCESS_REQUEST_STATE; + + rc = ngx_http_process_request_header(r); + + if (rc != NGX_OK) { + ngx_http_client_error(r, rc, NGX_HTTP_BAD_REQUEST); + return; + } + + if (rev->timer_set) { + ngx_del_timer(rev); + } + +#if (NGX_STAT_STUB) + (*ngx_stat_reading)--; + r->stat_reading = 0; + (*ngx_stat_writing)++; + r->stat_writing = 1; +#endif + + rev->event_handler = ngx_http_block_read; + ngx_http_handler(r); + return; + + } else if (rc != NGX_AGAIN) { + + /* there was error while a header line parsing */ + +#if (NGX_DEBUG) + if (rc == NGX_HTTP_PARSE_INVALID_HEADER + && (rev->log->log_level & NGX_LOG_DEBUG_HTTP)) + { + u_char *p; + for (p = r->header_name_start; + p < r->header_in->last - 1; + p++) + { + if (*p == LF) { + break; + } + } + *p = '\0'; + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, rev->log, 0, + "http invalid header: \"%s\"", + r->header_name_start); + } +#endif + + ngx_http_client_error(r, rc, NGX_HTTP_BAD_REQUEST); + return; + } + + /* NGX_AGAIN: a header line parsing is still not complete */ + + } +} + + +static ssize_t ngx_http_read_request_header(ngx_http_request_t *r) +{ + ssize_t n; + ngx_event_t *rev; + ngx_http_core_srv_conf_t *cscf; + + rev = r->connection->read; + + n = r->header_in->last - r->header_in->pos; + + if (n > 0) { + return n; + } + + if (!rev->ready) { + return NGX_AGAIN; + } + + n = r->connection->recv(r->connection, r->header_in->last, + r->header_in->end - r->header_in->last); + + if (n == NGX_AGAIN) { + if (!r->header_timeout_set) { + cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); + ngx_add_timer(rev, cscf->client_header_timeout); + r->header_timeout_set = 1; + } + + if (ngx_handle_read_event(rev, 0) == NGX_ERROR) { + ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + ngx_http_close_connection(r->connection); + return NGX_ERROR; + } + + return NGX_AGAIN; + } + + if (n == 0) { + ngx_log_error(NGX_LOG_INFO, r->connection->log, 0, + "client closed prematurely connection"); + } + + if (n == 0 || n == NGX_ERROR) { + ngx_http_close_request(r, NGX_HTTP_BAD_REQUEST); + ngx_http_close_connection(r->connection); + return NGX_ERROR; + } + + r->header_in->last += n; + + return n; +} + + +static ngx_int_t ngx_http_alloc_large_header_buffer(ngx_http_request_t *r, + ngx_uint_t request_line) +{ + u_char *old, *new; + ngx_buf_t *b; + ngx_http_connection_t *hc; + ngx_http_core_srv_conf_t *cscf; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http alloc large header buffer"); + + if (request_line && r->state == 0) { + + /* the client fills up the buffer with "\r\n" */ + + r->header_in->pos = r->header_in->start; + r->header_in->last = r->header_in->start; + + return NGX_OK; + } + + old = request_line ? r->request_start : r->header_name_start; + + cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); + + if (r->state != 0 + && (size_t) (r->header_in->pos - old) + >= cscf->large_client_header_buffers.size) + { + return NGX_DECLINED; + } + + hc = r->http_connection; + + if (hc->nfree) { + b = hc->free[--hc->nfree]; + + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http large header free: " PTR_FMT " " SIZE_T_FMT, + b->pos, b->end - b->last); + + } else if (hc->nbusy < cscf->large_client_header_buffers.num) { + + if (hc->busy == NULL) { + hc->busy = ngx_palloc(r->connection->pool, + cscf->large_client_header_buffers.num * sizeof(ngx_buf_t *)); + if (hc->busy == NULL) { + return NGX_ERROR; + } + } + + b = ngx_create_temp_buf(r->connection->pool, + cscf->large_client_header_buffers.size); + if (b == NULL) { + return NGX_ERROR; + } + + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http large header alloc: " PTR_FMT " " SIZE_T_FMT, + b->pos, b->end - b->last); + + } else { + return NGX_DECLINED; + } + + hc->busy[hc->nbusy++] = b; + + if (r->state == 0) { + /* + * r->state == 0 means that a header line was parsed successfully + * and we do not need to copy incomplete header line and + * to relocate the parser header pointers + */ + + r->header_in = b; + + return NGX_OK; + } + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http large header copy: %d", r->header_in->pos - old); + + new = b->start; + + ngx_memcpy(new, old, r->header_in->pos - old); + + b->pos = new + (r->header_in->pos - old); + b->last = new + (r->header_in->pos - old); + + if (request_line) { + r->request_start = new; + + if (r->request_end) { + r->request_end = new + (r->request_end - old); + } + + r->method_end = new + (r->method_end - old); + + r->uri_start = new + (r->uri_start - old); + r->uri_end = new + (r->uri_end - old); + + if (r->schema_start) { + r->schema_start = new + (r->schema_start - old); + r->schema_end = new + (r->schema_end - old); + } + + if (r->host_start) { + r->host_start = new + (r->host_start - old); + r->host_end = new + (r->host_end - old); + } + + if (r->port_start) { + r->port_start = new + (r->port_start - old); + r->port_end = new + (r->port_end - old); + } + + if (r->uri_ext) { + r->uri_ext = new + (r->uri_ext - old); + } + + if (r->args_start) { + r->args_start = new + (r->args_start - old); + } + + } else { + r->header_name_start = new; + r->header_name_end = new + (r->header_name_end - old); + r->header_start = new + (r->header_start - old); + r->header_end = new + (r->header_end - old); + } + + r->header_in = b; + + return NGX_OK; +} + + +static ngx_int_t ngx_http_process_request_header(ngx_http_request_t *r) +{ + u_char *ua, *user_agent; + size_t len; + ngx_uint_t i; + ngx_http_server_name_t *name; + ngx_http_core_srv_conf_t *cscf; + ngx_http_core_loc_conf_t *clcf; + + 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; + + /* find the name based server configuration */ + + name = r->virtual_names->elts; + for (i = 0; i < r->virtual_names->nelts; i++) { + if (r->headers_in.host_name_len != name[i].name.len) { + continue; + } + + if (ngx_strncasecmp(r->headers_in.host->value.data, + name[i].name.data, + r->headers_in.host_name_len) == 0) + { + r->srv_conf = name[i].core_srv_conf->ctx->srv_conf; + r->loc_conf = name[i].core_srv_conf->ctx->loc_conf; + r->server_name = &name[i].name; + + clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); + r->connection->log->file = clcf->err_log->file; + if (!(r->connection->log->log_level & NGX_LOG_DEBUG_CONNECTION)) + { + r->connection->log->log_level = clcf->err_log->log_level; + } + + break; + } + } + + if (i == r->virtual_names->nelts) { + cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); + + if (cscf->restrict_host_names != NGX_HTTP_RESTRICT_HOST_OFF) { + return NGX_HTTP_PARSE_INVALID_HOST; + } + } + + } else { + if (r->http_version > NGX_HTTP_VERSION_10) { + return NGX_HTTP_PARSE_NO_HOST_HEADER; + } + r->headers_in.host_name_len = 0; + } + + if (r->headers_in.content_length) { + r->headers_in.content_length_n = + ngx_atoi(r->headers_in.content_length->value.data, + r->headers_in.content_length->value.len); + + if (r->headers_in.content_length_n == NGX_ERROR) { + return NGX_HTTP_PARSE_INVALID_CL_HEADER; + } + } + + if (r->method == NGX_HTTP_POST && r->headers_in.content_length_n <= 0) { + return NGX_HTTP_PARSE_POST_WO_CL_HEADER; + } + + if (r->plain_http) { + return NGX_HTTP_PARSE_HTTP_TO_HTTPS; + } + + if (r->headers_in.connection) { + if (r->headers_in.connection->value.len == 5 + && ngx_strcasecmp(r->headers_in.connection->value.data, "close") + == 0) + { + r->headers_in.connection_type = NGX_HTTP_CONNECTION_CLOSE; + + } else if (r->headers_in.connection->value.len == 10 + && ngx_strcasecmp(r->headers_in.connection->value.data, + "keep-alive") == 0) + { + r->headers_in.connection_type = NGX_HTTP_CONNECTION_KEEP_ALIVE; + + if (r->headers_in.keep_alive) { + r->headers_in.keep_alive_n = + ngx_atoi(r->headers_in.keep_alive->value.data, + r->headers_in.keep_alive->value.len); + } + } + } + + if (r->headers_in.user_agent) { + + /* + * check some widespread browsers while the headers are still + * in CPU cache + */ + + user_agent = r->headers_in.user_agent->value.data; + + ua = (u_char *) ngx_strstr(user_agent, "MSIE"); + + if (ua && ua + 8 < user_agent + r->headers_in.user_agent->value.len) { + + r->headers_in.msie = 1; + + if (ua[4] == ' ' && ua[5] == '4' && ua[6] == '.') { + r->headers_in.msie4 = 1; + } + +#if 0 + /* MSIE ignores the SSL "close notify" alert */ + + ngx_ssl_set_nosendshut(r->connection->ssl); +#endif + } + + if (ngx_strstr(user_agent, "Opera")) { + r->headers_in.opera = 1; + r->headers_in.msie = 0; + r->headers_in.msie4 = 0; + } + + if (!r->headers_in.msie && !r->headers_in.opera) { + + if (ngx_strstr(user_agent, "Gecko/")) { + r->headers_in.gecko = 1; + + } else if (ngx_strstr(user_agent, "Konqueror")) { + r->headers_in.konqueror = 1; + } + } + } + + return NGX_OK; +} + + +void ngx_http_finalize_request(ngx_http_request_t *r, int rc) +{ + ngx_http_core_loc_conf_t *clcf; + + /* r can be already destroyed when rc == NGX_DONE */ + + if (rc == NGX_DONE || r->main) { + return; + } + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http finalize request: %d", rc); + + if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { + + if (r->connection->read->timer_set) { + ngx_del_timer(r->connection->read); + } + + if (r->connection->write->timer_set) { + ngx_del_timer(r->connection->write); + } + + if (rc == NGX_HTTP_CLIENT_CLOSED_REQUEST || r->closed) { + ngx_http_close_request(r, 0); + ngx_http_close_connection(r->connection); + return; + } + + ngx_http_finalize_request(r, ngx_http_special_response_handler(r, rc)); + + return; + + } else if (rc == NGX_ERROR) { + ngx_http_close_request(r, 0); + ngx_http_close_connection(r->connection); + return; + + } else if (rc == NGX_AGAIN) { + ngx_http_set_write_handler(r); + return; + } + + if (r->connection->read->timer_set) { + ngx_del_timer(r->connection->read); + } + + if (r->connection->write->timer_set) { + r->connection->write->delayed = 0; + ngx_del_timer(r->connection->write); + } + + if (r->connection->read->pending_eof) { +#if (NGX_KQUEUE) + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, + r->connection->read->kq_errno, + "kevent() reported about an closed connection"); +#endif + ngx_http_close_request(r, 0); + ngx_http_close_connection(r->connection); + return; + } + + clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); + + if (!ngx_terminate + && !ngx_exiting + && r->keepalive != 0 + && clcf->keepalive_timeout > 0) + { + ngx_http_set_keepalive(r); + return; + + } else if (r->lingering_close && clcf->lingering_timeout > 0) { + ngx_http_set_lingering_close(r); + return; + } + + ngx_http_close_request(r, 0); + ngx_http_close_connection(r->connection); +} + + +static void ngx_http_set_write_handler(ngx_http_request_t *r) +{ + ngx_event_t *wev; + ngx_http_core_loc_conf_t *clcf; + + wev = r->connection->write; + wev->event_handler = ngx_http_writer; + + r->http_state = NGX_HTTP_WRITING_REQUEST_STATE; + + if (wev->ready && wev->delayed) { + return; + } + + clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r, + ngx_http_core_module); + if (!wev->delayed) { + ngx_add_timer(wev, clcf->send_timeout); + } + + wev->available = clcf->send_lowat; + if (ngx_handle_write_event(wev, NGX_LOWAT_EVENT) == NGX_ERROR) { + ngx_http_close_request(r, 0); + ngx_http_close_connection(r->connection); + } + + return; +} + + +void ngx_http_writer(ngx_event_t *wev) +{ + int rc; + ngx_connection_t *c; + ngx_http_request_t *r; + ngx_http_core_loc_conf_t *clcf; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0, "http writer handler"); + + c = wev->data; + r = c->data; + + if (wev->timedout) { + if (!wev->delayed) { + ngx_http_client_error(r, 0, NGX_HTTP_REQUEST_TIME_OUT); + return; + } + + wev->timedout = 0; + wev->delayed = 0; + + if (!wev->ready) { + clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r, + ngx_http_core_module); + ngx_add_timer(wev, clcf->send_timeout); + + wev->available = clcf->send_lowat; + + if (ngx_handle_write_event(wev, NGX_LOWAT_EVENT) == NGX_ERROR) { + ngx_http_close_request(r, 0); + ngx_http_close_connection(r->connection); + } + + return; + } + + } else { + if (wev->delayed) { + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0, + "http writer delayed"); + + clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r, + ngx_http_core_module); + wev->available = clcf->send_lowat; + + if (ngx_handle_write_event(wev, NGX_LOWAT_EVENT) == NGX_ERROR) { + ngx_http_close_request(r, 0); + ngx_http_close_connection(r->connection); + } + + return; + } + } + + rc = ngx_http_output_filter(r, NULL); + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http writer output filter: %d", rc); + + if (rc == NGX_AGAIN) { + clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r, + ngx_http_core_module); + if (!wev->ready && !wev->delayed) { + ngx_add_timer(wev, clcf->send_timeout); + } + + wev->available = clcf->send_lowat; + + if (ngx_handle_write_event(wev, NGX_LOWAT_EVENT) == NGX_ERROR) { + ngx_http_close_request(r, 0); + ngx_http_close_connection(r->connection); + } + + return; + } + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http writer done"); + + ngx_http_finalize_request(r, rc); +} + + +static void ngx_http_block_read(ngx_event_t *rev) +{ + ngx_connection_t *c; + ngx_http_request_t *r; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http read blocked"); + + /* aio does not call this handler */ + + if ((ngx_event_flags & NGX_USE_LEVEL_EVENT) && rev->active) { + if (ngx_del_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) { + c = rev->data; + r = c->data; + ngx_http_close_request(r, 0); + ngx_http_close_connection(c); + } + } +} + + +ngx_int_t ngx_http_discard_body(ngx_http_request_t *r) +{ + ssize_t size; + ngx_event_t *rev; + + rev = r->connection->read; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body"); + + if (rev->timer_set) { + ngx_del_timer(rev); + } + + if (r->headers_in.content_length_n <= 0) { + return NGX_OK; + } + + size = r->header_in->last - r->header_in->pos; + + if (size) { + if (r->headers_in.content_length_n > size) { + r->headers_in.content_length_n -= size; + + } else { + r->header_in->pos += r->headers_in.content_length_n; + r->headers_in.content_length_n = 0; + return NGX_OK; + } + } + + rev->event_handler = ngx_http_read_discarded_body_event; + + if (ngx_handle_level_read_event(rev) == NGX_ERROR) { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } + + return ngx_http_read_discarded_body(r); +} + + +static void ngx_http_read_discarded_body_event(ngx_event_t *rev) +{ + ngx_int_t rc; + ngx_connection_t *c; + ngx_http_request_t *r; + + c = rev->data; + r = c->data; + + rc = ngx_http_read_discarded_body(r); + + if (rc == NGX_AGAIN) { + if (ngx_handle_level_read_event(rev) == NGX_ERROR) { + ngx_http_close_request(r, rc); + ngx_http_close_connection(c); + return; + } + } + + if (rc != NGX_OK) { + ngx_http_close_request(r, rc); + ngx_http_close_connection(c); + } +} + + +static ngx_int_t ngx_http_read_discarded_body(ngx_http_request_t *r) +{ + ssize_t size, n; + u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE]; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "http read discarded body"); + + if (r->headers_in.content_length_n == 0) { + return NGX_OK; + } + + + size = r->headers_in.content_length_n; + + if (size > NGX_HTTP_DISCARD_BUFFER_SIZE) { + size = NGX_HTTP_DISCARD_BUFFER_SIZE; + } + + n = r->connection->recv(r->connection, buffer, size); + + if (n == NGX_ERROR) { + + r->closed = 1; + + /* + * if a client request body is discarded then we already set + * some HTTP response code for client and we can ignore the error + */ + + return NGX_OK; + } + + if (n == NGX_AGAIN) { + return NGX_AGAIN; + } + + r->headers_in.content_length_n -= n; + + return NGX_OK; +} + + +static void ngx_http_set_keepalive(ngx_http_request_t *r) +{ + ngx_int_t i; + ngx_buf_t *b, *f; + ngx_event_t *rev, *wev; + ngx_connection_t *c; + ngx_http_connection_t *hc; + ngx_http_log_ctx_t *ctx; + ngx_http_core_srv_conf_t *cscf; + ngx_http_core_loc_conf_t *clcf; + + c = r->connection; + rev = c->read; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "set http keepalive handler"); + + ctx = (ngx_http_log_ctx_t *) c->log->data; + ctx->action = "closing request"; + + hc = r->http_connection; + b = r->header_in; + + if (b->pos < b->last) { + + /* the pipelined request */ + + if (b != c->buffer) { + + /* move the large header buffers to the free list */ + + cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); + + if (hc->free == NULL) { + hc->free = ngx_palloc(c->pool, + cscf->large_client_header_buffers.num * sizeof(ngx_buf_t *)); + + if (hc->free == NULL) { + ngx_http_close_connection(c); + return; + } + } + + for (i = 0; i < hc->nbusy - 1; i++) { + f = hc->busy[i]; + hc->free[hc->nfree++] = f; + f->pos = f->start; + f->last = f->start; + } + + hc->busy[0] = b; + hc->nbusy = 1; + } + } + + ngx_http_close_request(r, 0); + c->data = hc; + + clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); + ngx_add_timer(rev, clcf->keepalive_timeout); + + if (ngx_handle_level_read_event(rev) == NGX_ERROR) { + ngx_http_close_connection(c); + return; + } + + wev = c->write; + wev->event_handler = ngx_http_empty_handler; + + if (b->pos < b->last) { + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "pipelined request"); + + hc->pipeline = 1; + ctx->action = "reading client pipelined request line"; + ngx_http_init_request(rev); + return; + } + + hc->pipeline = 0; + + if (ngx_pfree(c->pool, r) == NGX_OK) { + hc->request = NULL; + } + + b = c->buffer; + + if (ngx_pfree(c->pool, b->start) == NGX_OK) { + b->pos = NULL; + + } else { + b->pos = b->start; + b->last = b->start; + } + + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, "hc free: " PTR_FMT " %d", + hc->free, hc->nfree); + + if (hc->free) { + for (i = 0; i < hc->nfree; i++) { + ngx_pfree(c->pool, hc->free[i]); + hc->free[i] = NULL; + } + + hc->nfree = 0; + } + + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, "hc busy: " PTR_FMT " %d", + hc->busy, hc->nbusy); + + if (hc->busy) { + for (i = 0; i < hc->nbusy; i++) { + ngx_pfree(c->pool, hc->busy[i]); + hc->busy[i] = NULL; + } + + hc->nbusy = 0; + } + + rev->event_handler = ngx_http_keepalive_handler; + + if (wev->active) { + if (ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) { + if (ngx_del_event(wev, NGX_WRITE_EVENT, NGX_DISABLE_EVENT) + == NGX_ERROR) + { + ngx_http_close_connection(c); + return; + } + + } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) { + if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) { + ngx_http_close_connection(c); + return; + } + } + } + + ctx->action = "keepalive"; + + if (c->tcp_nopush == NGX_TCP_NOPUSH_SET) { + if (ngx_tcp_push(c->fd) == NGX_ERROR) { + ngx_connection_error(c, ngx_socket_errno, ngx_tcp_push_n " failed"); + ngx_http_close_connection(c); + return; + } + c->tcp_nopush = NGX_TCP_NOPUSH_UNSET; + } + +#if 0 + /* if "keepalive_buffers off" then we need some other place */ + r->http_state = NGX_HTTP_KEEPALIVE_STATE; +#endif + + if (rev->ready) { + ngx_http_keepalive_handler(rev); + } +} + + +static void ngx_http_keepalive_handler(ngx_event_t *rev) +{ + size_t size; + ssize_t n; + ngx_buf_t *b; + ngx_connection_t *c; + ngx_http_log_ctx_t *ctx; + ngx_http_connection_t *hc; + + c = rev->data; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http keepalive handler"); + + if (rev->timedout) { + ngx_http_close_connection(c); + return; + } + + ctx = (ngx_http_log_ctx_t *) rev->log->data; + +#if (HAVE_KQUEUE) + + if (ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) { + if (rev->pending_eof) { + ngx_log_error(NGX_LOG_INFO, c->log, rev->kq_errno, + "kevent() reported that client %s closed " + "keepalive connection", ctx->client); + ngx_http_close_connection(c); + return; + } + } + +#endif + + hc = c->data; + b = c->buffer; + size = b->end - b->start; + + if (b->pos == NULL) { + if (!(b->pos = ngx_palloc(c->pool, size))) { + ngx_http_close_connection(c); + return; + } + + b->start = b->pos; + b->last = b->pos; + b->end = b->pos + size; + } + + /* + * MSIE closes a keepalive connection with RST flag + * so we ignore ECONNRESET here. + */ + + c->log_error = NGX_ERROR_IGNORE_ECONNRESET; + ngx_set_socket_errno(0); + + n = c->recv(c, b->last, size); + c->log_error = NGX_ERROR_INFO; + + if (n == NGX_AGAIN) { + return; + } + + if (n == NGX_ERROR) { + ngx_http_close_connection(c); + return; + } + + rev->log->handler = NULL; + + if (n == 0) { + ngx_log_error(NGX_LOG_INFO, c->log, ngx_socket_errno, + "client %s closed keepalive connection", ctx->client); + ngx_http_close_connection(c); + return; + } + + b->last += n; + rev->log->handler = ngx_http_log_error; + ctx->action = "reading client request line"; + + ngx_http_init_request(rev); +} + + +static void ngx_http_set_lingering_close(ngx_http_request_t *r) +{ + ngx_event_t *rev, *wev; + ngx_connection_t *c; + ngx_http_core_loc_conf_t *clcf; + + c = r->connection; + + clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); + + rev = c->read; + rev->event_handler = ngx_http_lingering_close_handler; + + r->lingering_time = ngx_time() + clcf->lingering_time / 1000; + ngx_add_timer(rev, clcf->lingering_timeout); + + if (ngx_handle_level_read_event(rev) == NGX_ERROR) { + ngx_http_close_request(r, 0); + ngx_http_close_connection(c); + return; + } + + wev = c->write; + wev->event_handler = ngx_http_empty_handler; + + if (wev->active) { + if (ngx_event_flags & NGX_HAVE_KQUEUE_EVENT) { + if (ngx_del_event(wev, NGX_WRITE_EVENT, NGX_DISABLE_EVENT) + == NGX_ERROR) + { + ngx_http_close_connection(c); + return; + } + + } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) { + if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) { + ngx_http_close_connection(c); + return; + } + } + } + + if (ngx_shutdown_socket(c->fd, NGX_WRITE_SHUTDOWN) == -1) { + ngx_connection_error(c, ngx_socket_errno, + ngx_shutdown_socket_n " failed"); + ngx_http_close_request(r, 0); + ngx_http_close_connection(c); + return; + } + + if (rev->ready) { + ngx_http_lingering_close_handler(rev); + } +} + + +static void 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 *clcf; + u_char buffer[NGX_HTTP_LINGERING_BUFFER_SIZE]; + + c = rev->data; + r = c->data; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http lingering close handler"); + + if (rev->timedout) { + ngx_http_close_request(r, 0); + ngx_http_close_connection(c); + return; + } + + timer = r->lingering_time - ngx_time(); + if (timer <= 0) { + ngx_http_close_request(r, 0); + ngx_http_close_connection(c); + return; + } + + do { + n = c->recv(c, buffer, NGX_HTTP_LINGERING_BUFFER_SIZE); + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "lingering read: %d", n); + + if (n == NGX_ERROR || n == 0) { + ngx_http_close_request(r, 0); + ngx_http_close_connection(c); + return; + } + + } while (rev->ready); + + clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); + + timer *= 1000; + + if (timer > clcf->lingering_timeout) { + timer = clcf->lingering_timeout; + } + + ngx_add_timer(rev, timer); + + return; +} + + +void ngx_http_empty_handler(ngx_event_t *wev) +{ + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0, "http empty handler"); + + return; +} + + +ngx_int_t ngx_http_send_last(ngx_http_request_t *r) +{ + ngx_buf_t *b; + ngx_chain_t out; + + if (!(b = ngx_calloc_buf(r->pool))) { + return NGX_ERROR; + } + + b->last_buf = 1; + out.buf = b; + out.next = NULL; + + return ngx_http_output_filter(r, &out); +} + + +void ngx_http_close_request(ngx_http_request_t *r, int error) +{ + ngx_uint_t i; + ngx_log_t *log; + ngx_http_log_ctx_t *ctx; + ngx_http_cleanup_t *cleanup; + ngx_http_core_loc_conf_t *clcf; + struct linger l; + + log = r->connection->log; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http close request"); + + if (r->pool == NULL) { + ngx_log_error(NGX_LOG_ALERT, log, 0, + "http request already closed"); + return; + } + +#if (NGX_STAT_STUB) + if (r->stat_reading) { + (*ngx_stat_reading)--; + } + + if (r->stat_writing) { + (*ngx_stat_writing)--; + } +#endif + + if (error && r->headers_out.status == 0) { + r->headers_out.status = error; + } + + ngx_http_log_handler(r); + + cleanup = r->cleanup.elts; + for (i = 0; i < r->cleanup.nelts; i++) { + if (!cleanup[i].valid) { + continue; + } + +#if (NGX_HTTP_CACHE) + + if (cleanup[i].cache) { + ngx_http_cache_unlock(cleanup[i].data.cache.hash, + cleanup[i].data.cache.cache, log); + continue; + } + +#endif + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http cleanup fd: %d", + cleanup[i].data.file.fd); + + if (ngx_close_file(cleanup[i].data.file.fd) == NGX_FILE_ERROR) { + ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, + ngx_close_file_n " \"%s\" failed", + cleanup[i].data.file.name); + } + } + + /* STUB */ + if (r->file.fd != NGX_INVALID_FILE) { + if (ngx_close_file(r->file.fd) == NGX_FILE_ERROR) { + ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, + ngx_close_file_n " \"%s\" failed", r->file.name.data); + } + } + + if (r->request_body + && r->request_body->temp_file + && r->request_body->temp_file->file.fd != NGX_INVALID_FILE) + { + if (ngx_close_file(r->request_body->temp_file->file.fd) + == NGX_FILE_ERROR) + { + ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, + ngx_close_file_n " deleted file \"%s\" failed", + r->request_body->temp_file->file.name.data); + } + } + + if (r->connection->timedout) { + clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); + + if (clcf->reset_timedout_connection) { + l.l_onoff = 1; + l.l_linger = 0; + + if (setsockopt(r->connection->fd, SOL_SOCKET, SO_LINGER, + (const void *) &l, sizeof(struct linger)) == -1) + { + ngx_log_error(NGX_LOG_ALERT, log, ngx_socket_errno, + "setsockopt(SO_LINGER) failed"); + } + } + } + + /* ctx->url was allocated from r->pool */ + ctx = log->data; + ctx->url = NULL; + + r->request_line.len = 0; + + ngx_destroy_pool(r->pool); + + return; +} + + +#if (NGX_HTTP_SSL) + +void ngx_ssl_close_handler(ngx_event_t *ev) +{ + ngx_connection_t *c; + + c = ev->data; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ev->log, 0, "http ssl close handler"); + + if (ngx_ssl_shutdown(c) == NGX_AGAIN) { + return; + } + + ngx_http_close_connection(c); +} + +#endif + + +void ngx_http_close_connection(ngx_connection_t *c) +{ + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "close http connection: %d", c->fd); + +#if (NGX_STAT_STUB) + (*ngx_stat_active)--; +#endif + + ngx_close_connection(c); +} + + +static void ngx_http_client_error(ngx_http_request_t *r, + int client_error, int error) +{ + ngx_http_log_ctx_t *ctx; + ngx_http_core_srv_conf_t *cscf; + + ctx = r->connection->log->data; + + if (error == NGX_HTTP_REQUEST_TIME_OUT) { + ngx_log_error(NGX_LOG_INFO, r->connection->log, NGX_ETIMEDOUT, + "client timed out"); + r->connection->timedout = 1; + ngx_http_close_request(r, error); + ngx_http_close_connection(r->connection); + return; + } + + r->connection->log->handler = NULL; + + if (ctx->url) { + switch (client_error) { + + case NGX_HTTP_PARSE_INVALID_HOST: + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + client_header_errors[client_error - NGX_HTTP_CLIENT_ERROR], + ctx->client, r->headers_in.host->value.data, ctx->url); + + error = NGX_HTTP_INVALID_HOST; + + cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); + + if (cscf->restrict_host_names == NGX_HTTP_RESTRICT_HOST_CLOSE) { + ngx_http_close_request(r, error); + ngx_http_close_connection(r->connection); + return; + } + + break; + + case NGX_HTTP_PARSE_HTTP_TO_HTTPS: + error = NGX_HTTP_TO_HTTPS; + + /* fall through */ + + default: + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + client_header_errors[client_error - NGX_HTTP_CLIENT_ERROR], + ctx->client, ctx->url); + } + + } else { + if (error == NGX_HTTP_REQUEST_URI_TOO_LARGE) { + r->request_line.len = r->header_in->end - r->request_start; + r->request_line.data = r->request_start; + } + + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + client_header_errors[client_error - NGX_HTTP_CLIENT_ERROR], + ctx->client); + } + + r->connection->log->handler = ngx_http_log_error; + + ngx_http_finalize_request(r, error); +} + + +static size_t ngx_http_log_error(void *data, char *buf, size_t len) +{ + ngx_http_log_ctx_t *ctx = data; + + if (ctx->action && ctx->url) { + return ngx_snprintf(buf, len, " while %s, client: %s, URL: %s", + ctx->action, ctx->client, ctx->url); + + } else if (ctx->action == NULL && ctx->url) { + return ngx_snprintf(buf, len, ", client: %s, URL: %s", + ctx->client, ctx->url); + + } else { + return ngx_snprintf(buf, len, " while %s, client: %s", + ctx->action, ctx->client); + } +}