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-rw-r--r--src/http/ngx_http_request.c1541
1 files changed, 1541 insertions, 0 deletions
diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
new file mode 100644
index 000000000..0f66b0d40
--- /dev/null
+++ b/src/http/ngx_http_request.c
@@ -0,0 +1,1541 @@
+
+#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);
+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 void ngx_http_writer(ngx_event_t *ev);
+
+static void ngx_http_block_read(ngx_event_t *ev);
+static void ngx_http_read_discarded_body_event(ngx_event_t *rev);
+static int 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_empty_handler(ngx_event_t *wev);
+
+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);
+
+
+/* NGX_HTTP_PARSE_ ... errors */
+
+static char *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"
+};
+
+
+
+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("Content-Length"),
+ offsetof(ngx_http_headers_in_t, content_length) },
+ { ngx_string("Accept-Encoding"),
+ offsetof(ngx_http_headers_in_t, accept_encoding) },
+
+ { 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
+
+ { ngx_string("User-Agent"), offsetof(ngx_http_headers_in_t, user_agent) },
+
+ { ngx_null_string, 0 }
+};
+
+
+void ngx_http_init_connection(ngx_connection_t *c)
+{
+ int event;
+ ngx_event_t *rev;
+ ngx_http_log_ctx_t *lctx;
+
+ c->addr_text.data = ngx_palloc(c->pool, c->listening->addr_text_max_len);
+ if (c->addr_text.data == NULL) {
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ c->addr_text.len = ngx_sock_ntop(c->listening->family, c->sockaddr,
+ c->addr_text.data,
+ c->listening->addr_text_max_len);
+ if (c->addr_text.len == 0) {
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ lctx = ngx_pcalloc(c->pool, sizeof(ngx_http_log_ctx_t));
+ if (lctx == NULL) {
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ lctx->client = c->addr_text.data;
+ lctx->action = "reading client request line";
+ c->log->data = lctx;
+ c->log->handler = ngx_http_log_error;
+
+ rev = c->read;
+ rev->event_handler = ngx_http_init_request;
+
+ if (rev->ready) {
+ /* deferred accept */
+ ngx_http_init_request(rev);
+ return;
+ }
+
+ ngx_add_timer(rev, c->listening->post_accept_timeout);
+ rev->timer_set = 1;
+
+ if (ngx_event_flags & (NGX_HAVE_AIO_EVENT|NGX_HAVE_EDGE_EVENT)) {
+ /* aio, iocp, epoll */
+ ngx_http_init_request(rev);
+ return;
+ }
+
+ if (ngx_event_flags & NGX_HAVE_CLEAR_EVENT) {
+ /* kqueue */
+ event = NGX_CLEAR_EVENT;
+
+ } else {
+ /* select, poll, /dev/poll */
+ event = NGX_LEVEL_EVENT;
+ }
+
+ if (ngx_add_event(rev, NGX_READ_EVENT, event) == NGX_ERROR) {
+ ngx_http_close_connection(c);
+ }
+}
+
+
+static void ngx_http_init_request(ngx_event_t *rev)
+{
+ int 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_server_name_t *server_name;
+ ngx_http_core_srv_conf_t *cscf;
+ ngx_http_core_loc_conf_t *clcf;
+
+ c = rev->data;
+
+ r = ngx_pcalloc(c->pool, sizeof(ngx_http_request_t));
+ if (r == NULL) {
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ /* find the server configuration for the address:port */
+
+ /* AF_INET only */
+
+ in_port = c->servers;
+ in_addr = in_port->addrs.elts;
+
+ngx_log_debug(rev->log, "IN: %08x" _ in_port);
+
+ r->port = in_port->port;
+ r->port_name = &in_port->port_name;
+
+ i = 0;
+
+ if (in_port->addrs.nelts > 1) {
+
+ /*
+ * there're the several addresses on this port and one of them
+ * is "*:port" 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_log_error(NGX_LOG_CRIT, rev->log, ngx_socket_errno,
+ "getsockname() failed");
+ ngx_http_close_connection(c);
+ return;
+ }
+#if (WIN32)
+ }
+#endif
+
+ r->in_addr = addr_in.sin_addr.s_addr;
+
+ /* 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;
+
+ 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;
+ c->log->log_level = clcf->err_log->log_level;
+
+ if (c->buffer == NULL) {
+ c->buffer = ngx_create_temp_hunk(c->pool,
+ cscf->client_header_buffer_size,
+ 0, 0);
+ if (c->buffer == NULL) {
+ ngx_http_close_connection(c);
+ return;
+ }
+ }
+
+ r->pool = ngx_create_pool(cscf->request_pool_size, c->log);
+ if (r->pool == NULL) {
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ r->headers_out.headers = ngx_create_table(r->pool, 10);
+ if (r->headers_out.headers == NULL) {
+ 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->sent = 0;
+ c->data = r;
+ r->connection = c;
+ r->pipeline = c->pipeline;
+ r->header_in = c->buffer;
+
+ r->file.fd = NGX_INVALID_FILE;
+
+ r->headers_in.content_length_n = -1;
+ r->headers_out.content_length = -1;
+ r->headers_out.last_modified_time = -1;
+
+ rev->event_handler = ngx_http_process_request_line;
+ ngx_http_process_request_line(rev);
+}
+
+
+static void ngx_http_process_request_line(ngx_event_t *rev)
+{
+ int rc, offset;
+ ssize_t n;
+ ngx_connection_t *c;
+ ngx_http_request_t *r;
+ ngx_http_log_ctx_t *lctx;
+ ngx_http_core_srv_conf_t *cscf;
+
+ c = rev->data;
+ r = c->data;
+
+ ngx_log_debug(rev->log, "http process request line");
+
+ if (rev->timedout) {
+ ngx_http_close_request(r, NGX_HTTP_REQUEST_TIME_OUT);
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ n = ngx_http_read_request_header(r);
+
+ if (n == NGX_AGAIN || n == NGX_ERROR) {
+ return;
+ }
+
+ rc = ngx_http_parse_request_line(r);
+
+ if (rc == NGX_OK) {
+
+ /* the request line has been parsed successfully */
+
+ /* STUB: we need to handle such URIs */
+ if (r->complex_uri || r->unusual_uri) {
+ 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';
+
+ ngx_http_header_parse_error(r, NGX_HTTP_PARSE_INVALID_REQUEST);
+ ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
+ return;
+ }
+
+ cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
+
+ if (r->http_version >= NGX_HTTP_VERSION_10
+ && cscf->large_client_header == 0
+ && r->header_in->pos == r->header_in->end)
+ {
+ /* no space for "\r\n" at the end of the header */
+
+ ngx_http_header_parse_error(r, NGX_HTTP_PARSE_TOO_LONG_URI);
+ ngx_http_finalize_request(r, NGX_HTTP_REQUEST_URI_TOO_LARGE);
+ return;
+ }
+
+ /* 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;
+ }
+
+ r->uri.data = ngx_palloc(r->pool, r->uri.len + 1);
+ if (r->uri.data == NULL) {
+ ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ ngx_cpystrn(r->uri.data, r->uri_start, r->uri.len + 1);
+
+#if 1 /* THINK: needed to log url on errors in proxy only ? */
+
+ /* 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);
+
+#endif
+
+ 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 (cscf->large_client_header) {
+
+ r->request_line.data = ngx_palloc(r->pool, r->request_line.len + 1);
+ if (r->request_line.data == NULL) {
+ ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ 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;
+ }
+
+ r->exten.data = ngx_palloc(r->pool, r->exten.len + 1);
+ if (r->exten.data == NULL) {
+ 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);
+ }
+
+ /* 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;
+
+ r->args.data = ngx_palloc(r->pool, r->args.len + 1);
+ if (r->args.data == NULL) {
+ 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);
+ }
+
+#if 1 /* DEBUG */
+ if (r->exten.data == NULL) { r->exten.data = ""; }
+ if (r->args.data == NULL) { r->args.data = ""; }
+ ngx_log_debug(c->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
+
+ if (r->http_version < NGX_HTTP_VERSION_10) {
+ rev->event_handler = ngx_http_block_read;
+ ngx_http_handler(r);
+ return;
+ }
+
+ lctx = c->log->data;
+ lctx->action = "reading client request headers";
+ lctx->url = r->unparsed_uri.data;
+ r->headers_in.headers = ngx_create_table(r->pool, 10);
+
+ if (cscf->large_client_header
+ && r->header_in->pos == r->header_in->last)
+ {
+ r->header_in->pos = r->header_in->last = r->header_in->start;
+ }
+
+ 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 */
+
+ ngx_http_header_parse_error(r, rc);
+ ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
+
+ return;
+ }
+
+ /* 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 the 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 the r->header_in hunk in ngx_http_set_keepalive() */
+
+ cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
+
+ if (cscf->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);
+ ngx_http_finalize_request(r, NGX_HTTP_REQUEST_URI_TOO_LARGE);
+
+ return;
+ }
+
+ 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);
+ ngx_http_finalize_request(r, NGX_HTTP_REQUEST_URI_TOO_LARGE);
+ }
+ }
+
+ return;
+}
+
+
+static void ngx_http_process_request_headers(ngx_event_t *rev)
+{
+ int rc, i, offset;
+ size_t len;
+ ssize_t n;
+ ngx_table_elt_t *h;
+ ngx_connection_t *c;
+ ngx_http_request_t *r;
+ ngx_http_server_name_t *name;
+ ngx_http_core_srv_conf_t *cscf;
+ ngx_http_core_loc_conf_t *clcf;
+
+ c = rev->data;
+ r = c->data;
+
+ ngx_log_debug(rev->log, "http process request header line");
+
+ if (rev->timedout) {
+ ngx_http_close_request(r, NGX_HTTP_REQUEST_TIME_OUT);
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
+
+ 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_header_line(r, r->header_in);
+
+ if (rc == NGX_OK) {
+
+ /* a header line has been parsed successfully */
+
+ h = ngx_push_table(r->headers_in.headers);
+ if (h == NULL) {
+ 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->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 (cscf->large_client_header) {
+ h->key.data = ngx_palloc(r->pool,
+ h->key.len + 1 + h->value.len + 1);
+ if (h->key.data == NULL) {
+ ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ h->value.data = h->key.data + h->key.len + 1;
+ 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);
+
+ if (cscf->large_client_header
+ && r->header_in->pos == r->header_in->last)
+ {
+ r->header_in->pos = r->header_in->last = r->header_in->start;
+ }
+
+ continue;
+
+ } else if (rc == NGX_HTTP_PARSE_HEADER_DONE) {
+
+ /* a whole header has been parsed successfully */
+
+ 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;
+
+ /* 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;
+
+ clcf = ngx_http_get_module_loc_conf(r,
+ ngx_http_core_module);
+ c->log->file = clcf->err_log->file;
+ c->log->log_level = clcf->err_log->log_level;
+
+ break;
+ }
+ }
+
+ } else {
+ if (r->http_version > NGX_HTTP_VERSION_10) {
+ ngx_http_header_parse_error(r,
+ NGX_HTTP_PARSE_NO_HOST_HEADER);
+ ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
+ return;
+ }
+ 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) {
+ ngx_http_header_parse_error(r,
+ NGX_HTTP_PARSE_INVALID_CL_HEADER);
+ ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
+ return;
+ }
+ }
+
+ 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 */
+
+ ngx_http_header_parse_error(r, rc);
+ ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
+
+ return;
+ }
+
+ /* 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 (cscf->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);
+ ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
+ return;
+ }
+
+ 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);
+ ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
+ return;
+ }
+ }
+ }
+}
+
+
+static ssize_t ngx_http_read_request_header(ngx_http_request_t *r)
+{
+ int event;
+ 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) {
+ rev->ready = 0;
+ return n;
+ }
+
+ n = ngx_recv(r->connection, 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;
+ }
+
+ 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 (!rev->active) {
+ if (ngx_event_flags & NGX_HAVE_CLEAR_EVENT) {
+ /* kqueue */
+ event = NGX_CLEAR_EVENT;
+
+ } else {
+ /* select, poll, /dev/poll */
+ event = NGX_LEVEL_EVENT;
+ }
+
+ if (ngx_add_event(rev, NGX_READ_EVENT, event) == 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;
+}
+
+
+void ngx_http_finalize_request(ngx_http_request_t *r, int error)
+{
+ int rc;
+ ngx_event_t *rev, *wev;
+
+ if (r->main) {
+ return;
+ }
+
+ rc = error;
+
+ if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
+
+ rev = r->connection->read;
+ if (rev->timer_set) {
+ ngx_del_timer(rev);
+ rev->timer_set = 0;
+ }
+
+ wev = r->connection->write;
+ if (wev->timer_set) {
+ ngx_del_timer(wev);
+ wev->timer_set = 0;
+ }
+
+ rc = ngx_http_special_response_handler(r, rc);
+
+ if (rc == NGX_AGAIN) {
+ return;
+ }
+
+ if (rc == NGX_ERROR) {
+ ngx_http_close_request(r, 0);
+ ngx_http_close_connection(r->connection);
+ return;
+ }
+
+#if 1
+ return;
+#endif
+
+ } else if (rc == NGX_ERROR) {
+ r->keepalive = 0;
+ r->lingering_close = 0;
+
+ } else {
+ if (ngx_http_send_last(r) == NGX_ERROR) {
+ ngx_http_close_request(r, 0);
+ ngx_http_close_connection(r->connection);
+ return;
+ }
+
+ if (rc == NGX_AGAIN) {
+ ngx_http_set_write_handler(r);
+ return;
+ }
+ }
+
+ rev = r->connection->read;
+ if (rev->timer_set) {
+ ngx_del_timer(rev);
+ rev->timer_set = 0;
+ }
+
+ wev = r->connection->write;
+ if (wev->timer_set) {
+ ngx_del_timer(wev);
+ wev->timer_set = 0;
+ }
+
+ if (r->keepalive != 0) {
+ ngx_http_set_keepalive(r);
+
+ } else if (r->lingering_close) {
+ ngx_http_set_lingering_close(r);
+
+ } else {
+ ngx_http_close_request(r, 0);
+ ngx_http_close_connection(r->connection);
+ }
+
+ return;
+}
+
+
+void ngx_http_set_write_handler(ngx_http_request_t *r)
+{
+ int event;
+ ngx_event_t *wev;
+ ngx_http_core_loc_conf_t *clcf;
+
+ wev = r->connection->write;
+ wev->event_handler = ngx_http_writer;
+
+ if (wev->delayed && wev->ready) {
+ return;
+ }
+
+ clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r,
+ ngx_http_core_module);
+ ngx_add_timer(wev, clcf->send_timeout);
+ wev->timer_set = 1;
+
+ if (ngx_event_flags & (NGX_HAVE_AIO_EVENT|NGX_HAVE_EDGE_EVENT)) {
+ /* aio, iocp, epoll */
+ return;
+ }
+
+#if (HAVE_LOWAT_EVENT) /* kqueue's NOTE_LOWAT */
+
+ if (ngx_event_flags & NGX_HAVE_LOWAT_EVENT) {
+ wev->lowat = clcf->send_lowat;
+ }
+
+#endif
+
+ if (ngx_event_flags & NGX_HAVE_CLEAR_EVENT) {
+ /* kqueue */
+ event = NGX_CLEAR_EVENT;
+
+ } else {
+ /* select, poll, /dev/poll */
+ event = NGX_LEVEL_EVENT;
+ }
+
+ if (ngx_add_event(wev, NGX_WRITE_EVENT, event) == NGX_ERROR) {
+ ngx_http_close_request(r, 0);
+ ngx_http_close_connection(r->connection);
+ }
+
+ return;
+}
+
+
+static void ngx_http_writer(ngx_event_t *wev)
+{
+ int rc;
+ ngx_event_t *rev;
+ ngx_connection_t *c;
+ ngx_http_request_t *r;
+ ngx_http_core_loc_conf_t *clcf;
+
+ c = wev->data;
+ r = c->data;
+
+ rc = ngx_http_output_filter(r, NULL);
+
+ ngx_log_debug(c->log, "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->timer_set) {
+ ngx_del_timer(wev);
+ } else {
+ wev->timer_set = 1;
+ }
+
+ ngx_add_timer(wev, clcf->send_timeout);
+
+ return;
+ }
+
+ if (rc == NGX_ERROR) {
+ ngx_http_close_request(r, 0);
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ /* rc == NGX_OK */
+
+ ngx_log_debug(c->log, "http writer done");
+
+ rev = r->connection->read;
+ if (rev->timer_set) {
+ ngx_del_timer(rev);
+ rev->timer_set = 0;
+ }
+
+ if (wev->timer_set) {
+ ngx_del_timer(wev);
+ wev->timer_set = 0;
+ }
+
+ if (r->keepalive != 0) {
+ ngx_http_set_keepalive(r);
+
+ } else if (r->lingering_close) {
+ ngx_http_set_lingering_close(r);
+
+ } else {
+ ngx_http_close_request(r, 0);
+ ngx_http_close_connection(r->connection);
+ }
+
+ return;
+}
+
+
+static void ngx_http_block_read(ngx_event_t *rev)
+{
+ ngx_connection_t *c;
+ ngx_http_request_t *r;
+
+ ngx_log_debug(rev->log, "http read blocked");
+
+ /* aio does not call this handler */
+
+ if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
+
+ /* select, poll, /dev/poll */
+
+ rev->blocked = 1;
+
+ if (ngx_del_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) {
+ c = (ngx_connection_t *) rev->data;
+ r = (ngx_http_request_t *) c->data;
+ ngx_http_close_request(r, 0);
+ ngx_http_close_connection(c);
+ }
+ }
+
+ /* kqueue, epoll */
+
+ return;
+}
+
+
+int ngx_http_discard_body(ngx_http_request_t *r)
+{
+ ssize_t size;
+ ngx_event_t *rev;
+
+ rev = r->connection->read;
+
+ ngx_log_debug(rev->log, "set discard body");
+
+ if (rev->timer_set) {
+ ngx_del_timer(rev);
+ rev->timer_set = 0;
+ }
+
+ if (r->headers_in.content_length_n > 0) {
+
+ 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 (rev->blocked) {
+ if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
+ if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT)
+ == NGX_ERROR) {
+ return NGX_HTTP_INTERNAL_SERVER_ERROR;
+ }
+ }
+
+ rev->blocked = 0;
+ return ngx_http_read_discarded_body(r);
+ }
+ }
+
+ return NGX_OK;
+}
+
+
+static void ngx_http_read_discarded_body_event(ngx_event_t *rev)
+{
+ int 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_OK) {
+ ngx_http_close_request(r, rc);
+ ngx_http_close_connection(c);
+ }
+
+ return;
+}
+
+
+static int ngx_http_read_discarded_body(ngx_http_request_t *r)
+{
+ ssize_t size, n;
+ ngx_http_core_loc_conf_t *clcf;
+
+ ngx_log_debug(r->connection->log, "http read discarded body");
+
+ clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
+
+ if (r->discarded_buffer == NULL) {
+ r->discarded_buffer = ngx_palloc(r->pool, clcf->discarded_buffer_size);
+ if (r->discarded_buffer == NULL) {
+ return NGX_HTTP_INTERNAL_SERVER_ERROR;
+ }
+ }
+
+ size = r->headers_in.content_length_n;
+ if (size > clcf->discarded_buffer_size) {
+ size = clcf->discarded_buffer_size;
+ }
+
+ n = ngx_recv(r->connection, r->discarded_buffer, size);
+ if (n == NGX_ERROR) {
+ return NGX_HTTP_BAD_REQUEST;
+ }
+
+ if (n == NGX_AGAIN) {
+ return NGX_OK;
+ }
+
+ r->headers_in.content_length_n -= n;
+
+ return NGX_OK;
+}
+
+
+static void 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;
+ ngx_http_core_srv_conf_t *cscf;
+ ngx_http_core_loc_conf_t *clcf;
+
+ c = r->connection;
+ rev = c->read;
+
+ ngx_log_debug(c->log, "set http keepalive handler");
+
+ ctx = (ngx_http_log_ctx_t *) c->log->data;
+ ctx->action = "closing request";
+ ngx_http_close_request(r, 0);
+
+ if (rev->timer_set) {
+ ngx_del_timer(rev);
+ } else {
+ rev->timer_set = 1;
+ }
+
+ clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
+
+ ngx_add_timer(rev, clcf->keepalive_timeout);
+
+ if (rev->blocked && (ngx_event_flags & NGX_USE_LEVEL_EVENT)) {
+ if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT) == NGX_ERROR) {
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ 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 */
+
+ cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
+
+ if (!cscf->large_client_header) {
+ len = h->last - h->pos;
+ ngx_memcpy(h->start, h->pos, len);
+ h->pos = h->start;
+ h->last = h->start + len;
+ }
+
+ ngx_log_debug(c->log, "pipelined request");
+
+ c->pipeline = 1;
+ ctx->action = "reading client pipelined request line";
+ ngx_http_init_request(rev);
+ return;
+ }
+
+ c->pipeline = 0;
+
+ h->pos = h->last = h->start;
+ rev->event_handler = ngx_http_keepalive_handler;
+ wev = c->write;
+
+ if (wev->active) {
+ 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;
+ }
+
+ } else if ((ngx_event_flags & NGX_HAVE_AIO_EVENT) == 0) {
+ wev->event_handler = ngx_http_empty_handler;
+ }
+ }
+
+ ctx->action = "keepalive";
+
+ if (c->tcp_nopush) {
+ if (ngx_tcp_push(c->fd) == NGX_ERROR) {
+ ngx_log_error(NGX_LOG_CRIT, c->log, ngx_socket_errno,
+ ngx_tcp_push_n " failed");
+ ngx_http_close_connection(c);
+ return;
+ }
+ c->tcp_nopush = 0;
+ }
+
+ if ((ngx_event_flags & NGX_HAVE_AIO_EVENT) || blocked) {
+ ngx_http_keepalive_handler(rev);
+ }
+}
+
+
+static void 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) {
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ /* MSIE closes a keepalive connection with RST flag
+ so we ignore ECONNRESET here */
+
+ rev->ignore_econnreset = 1;
+ ngx_set_socket_errno(0);
+ n = ngx_recv(c, c->buffer->last, c->buffer->end - c->buffer->last);
+ rev->ignore_econnreset = 0;
+
+ if (n == NGX_AGAIN) {
+ return;
+ }
+
+ if (n == NGX_ERROR) {
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ 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);
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ c->buffer->last += n;
+ rev->log->handler = ngx_http_log_error;
+ lctx->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;
+ ngx_connection_t *c;
+ ngx_http_core_loc_conf_t *clcf;
+
+ c = r->connection;
+ rev = c->read;
+
+ clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
+
+ r->lingering_time = ngx_time() + clcf->lingering_time / 1000;
+ rev->event_handler = ngx_http_lingering_close_handler;
+
+ if (rev->timer_set) {
+ ngx_del_timer(rev);
+ } else {
+ rev->timer_set = 1;
+ }
+
+ ngx_add_timer(rev, clcf->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) {
+ ngx_http_close_request(r, 0);
+ ngx_http_close_connection(c);
+ return;
+ }
+ rev->blocked = 0;
+ }
+
+ if (c->write->active) {
+ if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
+ if (ngx_del_event(c->write, NGX_WRITE_EVENT, 0) == NGX_ERROR) {
+ ngx_http_close_request(r, 0);
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ } else if ((ngx_event_flags & NGX_HAVE_AIO_EVENT) == 0) {
+ c->write->event_handler = ngx_http_empty_handler;
+ }
+ }
+
+ 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");
+ ngx_http_close_request(r, 0);
+ ngx_http_close_connection(c);
+ return;
+ }
+
+ if (rev->ready || (ngx_event_flags & NGX_HAVE_AIO_EVENT)) {
+ 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;
+
+ c = rev->data;
+ r = c->data;
+
+ ngx_log_debug(c->log, "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;
+ }
+
+ clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
+
+ 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 (r->header_in->end - r->header_in->last
+ >= clcf->discarded_buffer_size) {
+ r->discarded_buffer = r->header_in->last;
+
+ } else {
+ r->discarded_buffer = ngx_palloc(c->pool,
+ clcf->discarded_buffer_size);
+ if (r->discarded_buffer) {
+ ngx_http_close_request(r, 0);
+ ngx_http_close_connection(c);
+ return;
+ }
+ }
+ }
+
+ do {
+ n = ngx_recv(c, r->discarded_buffer, clcf->discarded_buffer_size);
+
+ ngx_log_debug(c->log, "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);
+
+ timer *= 1000;
+ if (timer > clcf->lingering_timeout) {
+ timer = clcf->lingering_timeout;
+ }
+
+ if (rev->timer_set) {
+ ngx_del_timer(rev);
+ } else {
+ rev->timer_set = 1;
+ }
+ ngx_add_timer(rev, timer);
+
+ return;
+}
+
+
+static void ngx_http_empty_handler(ngx_event_t *wev)
+{
+ ngx_log_debug(wev->log, "http empty handler");
+
+ return;
+}
+
+
+int ngx_http_send_last(ngx_http_request_t *r)
+{
+ ngx_hunk_t *h;
+
+ ngx_test_null(h, ngx_calloc_hunk(r->pool), NGX_ERROR);
+ h->type = NGX_HUNK_LAST;
+
+ return ngx_http_output_filter(r, h);
+}
+
+
+void ngx_http_close_request(ngx_http_request_t *r, int error)
+{
+ ngx_http_log_ctx_t *ctx;
+
+ ngx_log_debug(r->connection->log, "close http request");
+
+ if (r->pool == NULL) {
+ ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
+ "http request already closed");
+ return;
+ }
+
+ if (error) {
+ r->headers_out.status = error;
+ }
+
+ ngx_http_log_handler(r);
+
+ if (r->file.fd != NGX_INVALID_FILE) {
+ if (ngx_close_file(r->file.fd) == NGX_FILE_ERROR) {
+ ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
+ ngx_close_file_n " \"%s\" failed", r->file.name.data);
+ }
+ }
+
+ /* ctx->url was allocated from r->pool */
+ ctx = (ngx_http_log_ctx_t *) r->connection->log->data;
+ ctx->url = NULL;
+
+ ngx_destroy_pool(r->pool);
+}
+
+
+void ngx_http_close_connection(ngx_connection_t *c)
+{
+ ngx_log_debug(c->log, "close connection: %d" _ c->fd);
+
+ if (c->pool == NULL) {
+ ngx_log_error(NGX_LOG_ALERT, c->log, 0, "connection already closed");
+ return;
+ }
+
+ if (c->read->timer_set) {
+ ngx_del_timer(c->read);
+ c->read->timer_set = 0;
+ }
+
+ if (c->write->timer_set) {
+ ngx_del_timer(c->write);
+ c->write->timer_set = 0;
+ }
+
+ if (ngx_del_conn) {
+ ngx_del_conn(c);
+
+ } else {
+ if (c->read->active) {
+ ngx_del_event(c->read, NGX_READ_EVENT, NGX_CLOSE_EVENT);
+ }
+
+ if (c->write->active) {
+ ngx_del_event(c->write, NGX_WRITE_EVENT, NGX_CLOSE_EVENT);
+ }
+ }
+
+ if (ngx_close_socket(c->fd) == -1) {
+ ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno,
+ ngx_close_socket_n " failed");
+ }
+
+ c->fd = -1;
+
+ ngx_destroy_pool(c->pool);
+}
+
+
+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->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);
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-16 20:32:47 +0000