Nginx-Perl

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src/http/ngx_http_request.c  view on Meta::CPAN

    c->log->action = "reading client request line";

    ngx_reusable_connection(c, 0);

    c->data = ngx_http_create_request(c);
    if (c->data == NULL) {
        ngx_http_close_connection(c);
        return;
    }

    rev->handler = ngx_http_process_request_line;
    ngx_http_process_request_line(rev);
}


ngx_http_request_t *
ngx_http_create_request(ngx_connection_t *c)
{
    ngx_pool_t                 *pool;
    ngx_time_t                 *tp;
    ngx_http_request_t         *r;
    ngx_http_log_ctx_t         *ctx;
    ngx_http_connection_t      *hc;
    ngx_http_core_srv_conf_t   *cscf;
    ngx_http_core_loc_conf_t   *clcf;
    ngx_http_core_main_conf_t  *cmcf;

    c->requests++;

    hc = c->data;

    cscf = ngx_http_get_module_srv_conf(hc->conf_ctx, ngx_http_core_module);

    pool = ngx_create_pool(cscf->request_pool_size, c->log);
    if (pool == NULL) {
        return NULL;
    }

    r = ngx_pcalloc(pool, sizeof(ngx_http_request_t));
    if (r == NULL) {
        ngx_destroy_pool(pool);
        return NULL;
    }

    r->pool = pool;

    r->http_connection = hc;
    r->signature = NGX_HTTP_MODULE;
    r->connection = c;

    r->main_conf = hc->conf_ctx->main_conf;
    r->srv_conf = hc->conf_ctx->srv_conf;
    r->loc_conf = hc->conf_ctx->loc_conf;

    r->read_event_handler = ngx_http_block_reading;

    clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);

    ngx_http_set_connection_log(r->connection, clcf->error_log);

    r->header_in = hc->nbusy ? hc->busy[0] : c->buffer;

    if (ngx_list_init(&r->headers_out.headers, r->pool, 20,
                      sizeof(ngx_table_elt_t))
        != NGX_OK)
    {
        ngx_destroy_pool(r->pool);
        return NULL;
    }

    r->ctx = ngx_pcalloc(r->pool, sizeof(void *) * ngx_http_max_module);
    if (r->ctx == NULL) {
        ngx_destroy_pool(r->pool);
        return NULL;
    }

    cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);

    r->variables = ngx_pcalloc(r->pool, cmcf->variables.nelts
                                        * sizeof(ngx_http_variable_value_t));
    if (r->variables == NULL) {
        ngx_destroy_pool(r->pool);
        return NULL;
    }

#if (NGX_HTTP_SSL)
    if (c->ssl) {
        r->main_filter_need_in_memory = 1;
    }
#endif

    r->main = r;
    r->count = 1;

    tp = ngx_timeofday();
    r->start_sec = tp->sec;
    r->start_msec = tp->msec;

    r->method = NGX_HTTP_UNKNOWN;
    r->http_version = NGX_HTTP_VERSION_10;

    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->uri_changes = NGX_HTTP_MAX_URI_CHANGES + 1;
    r->subrequests = NGX_HTTP_MAX_SUBREQUESTS + 1;

    r->http_state = NGX_HTTP_READING_REQUEST_STATE;

    ctx = c->log->data;
    ctx->request = r;
    ctx->current_request = r;
    r->log_handler = ngx_http_log_error_handler;

#if (NGX_STAT_STUB)
    (void) ngx_atomic_fetch_add(ngx_stat_reading, 1);
    r->stat_reading = 1;
    (void) ngx_atomic_fetch_add(ngx_stat_requests, 1);
#endif

src/http/ngx_http_request.c  view on Meta::CPAN

        ngx_log_error(NGX_LOG_INFO, c->log, 0,
                      "client prematurely closed connection");
    }

    if (n == 0 || n == NGX_ERROR) {
        c->error = 1;
        c->log->action = "reading client request headers";

        ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
        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: %p %uz",
                       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: %p %uz",
                       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);
            if (r->host_end) {
                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);
        }

src/http/ngx_http_request.c  view on Meta::CPAN

}


static void
ngx_http_set_keepalive(ngx_http_request_t *r)
{
    int                        tcp_nodelay;
    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_core_srv_conf_t  *cscf;
    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);

    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "set http keepalive handler");

    if (r->discard_body) {
        r->write_event_handler = ngx_http_request_empty_handler;
        r->lingering_time = ngx_time() + (time_t) (clcf->lingering_time / 1000);
        ngx_add_timer(rev, clcf->lingering_timeout);
        return;
    }

    c->log->action = "closing request";

    hc = r->http_connection;
    b = r->header_in;

    if (b->pos < b->last) {

        /* the pipelined request */

        if (b != c->buffer) {

            /*
             * If the large header buffers were allocated while the previous
             * request processing then we do not use c->buffer for
             * the pipelined request (see ngx_http_create_request()).
             *
             * Now we would 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_request(r, 0);
                    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;
        }
    }

    /* guard against recursive call from ngx_http_finalize_connection() */
    r->keepalive = 0;

    ngx_http_free_request(r, 0);

    c->data = hc;

    if (ngx_handle_read_event(rev, 0) != NGX_OK) {
        ngx_http_close_connection(c);
        return;
    }

    wev = c->write;
    wev->handler = ngx_http_empty_handler;

    if (b->pos < b->last) {

        ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "pipelined request");

        c->log->action = "reading client pipelined request line";

        r = ngx_http_create_request(c);
        if (r == NULL) {
            ngx_http_close_connection(c);
            return;
        }

        r->pipeline = 1;

        c->data = r;

        c->sent = 0;
        c->destroyed = 0;

        if (rev->timer_set) {
            ngx_del_timer(rev);
        }

        rev->handler = ngx_http_process_request_line;
        ngx_post_event(rev, &ngx_posted_events);
        return;
    }

    /*
     * To keep a memory footprint as small as possible for an idle keepalive
     * connection we try to free c->buffer's memory if it was allocated outside
     * the c->pool.  The large header buffers are always allocated outside the
     * c->pool and are freed too.
     */

    b = c->buffer;

    if (ngx_pfree(c->pool, b->start) == NGX_OK) {

        /*
         * the special note for ngx_http_keepalive_handler() that
         * c->buffer's memory was freed
         */

        b->pos = NULL;

    } else {
        b->pos = b->start;
        b->last = b->start;
    }

    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, "hc free: %p %d",
                   hc->free, hc->nfree);

    if (hc->free) {
        for (i = 0; i < hc->nfree; i++) {
            ngx_pfree(c->pool, hc->free[i]->start);
            hc->free[i] = NULL;
        }

        hc->nfree = 0;
    }

    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, "hc busy: %p %d",
                   hc->busy, hc->nbusy);

    if (hc->busy) {
        for (i = 0; i < hc->nbusy; i++) {
            ngx_pfree(c->pool, hc->busy[i]->start);
            hc->busy[i] = NULL;
        }

        hc->nbusy = 0;
    }

#if (NGX_HTTP_SSL)
    if (c->ssl) {
        ngx_ssl_free_buffer(c);
    }
#endif

    rev->handler = ngx_http_keepalive_handler;

    if (wev->active && (ngx_event_flags & NGX_USE_LEVEL_EVENT)) {
        if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) != NGX_OK) {
            ngx_http_close_connection(c);
            return;
        }
    }

    c->log->action = "keepalive";

    if (c->tcp_nopush == NGX_TCP_NOPUSH_SET) {
        if (ngx_tcp_push(c->fd) == -1) {
            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;
        tcp_nodelay = ngx_tcp_nodelay_and_tcp_nopush ? 1 : 0;

    } else {
        tcp_nodelay = 1;
    }

    if (tcp_nodelay
        && clcf->tcp_nodelay
        && c->tcp_nodelay == NGX_TCP_NODELAY_UNSET)
    {
        ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "tcp_nodelay");

        if (setsockopt(c->fd, IPPROTO_TCP, TCP_NODELAY,
                       (const void *) &tcp_nodelay, sizeof(int))
            == -1)
        {
#if (NGX_SOLARIS)
            /* Solaris returns EINVAL if a socket has been shut down */
            c->log_error = NGX_ERROR_IGNORE_EINVAL;
#endif

            ngx_connection_error(c, ngx_socket_errno,
                                 "setsockopt(TCP_NODELAY) failed");

            c->log_error = NGX_ERROR_INFO;
            ngx_http_close_connection(c);
            return;
        }

        c->tcp_nodelay = NGX_TCP_NODELAY_SET;
    }

#if 0