mirror of
https://github.com/warmcat/libwebsockets.git
synced 2025-03-16 00:00:07 +01:00
8a7e0edb7d
The vfork optimized spawn, stdxxx and terminal handling in the cgi implementation is quite mature and sophisticated, and useful for other things unrelated to cgi. Break it out into its own public api under LWS_WITH_SPAWN, off by default. Expand it so the parent wsi is optional, and the role and protocol bindings for stdxxx pipes can be set. Allow optional sul timeout and external lws_dll2 owner for extant children. Remove inline style from minimal http-server-cgi
147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <private-lib-core.h>
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static int
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rops_handle_POLLIN_cgi(struct lws_context_per_thread *pt, struct lws *wsi,
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struct lws_pollfd *pollfd)
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{
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struct lws_cgi_args args;
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assert(wsi->role_ops == &role_ops_cgi);
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if (wsi->lsp_channel >= LWS_STDOUT &&
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!(pollfd->revents & pollfd->events & LWS_POLLIN))
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return LWS_HPI_RET_HANDLED;
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if (wsi->lsp_channel == LWS_STDIN &&
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!(pollfd->revents & pollfd->events & LWS_POLLOUT))
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return LWS_HPI_RET_HANDLED;
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if (wsi->lsp_channel == LWS_STDIN &&
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lws_change_pollfd(wsi, LWS_POLLOUT, 0)) {
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lwsl_info("failed at set pollfd\n");
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return LWS_HPI_RET_WSI_ALREADY_DIED;
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}
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args.ch = wsi->lsp_channel;
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args.stdwsi = &wsi->parent->http.cgi->lsp->stdwsi[0];
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args.hdr_state = wsi->hdr_state;
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lwsl_debug("CGI LWS_STDOUT %p wsistate 0x%x\n",
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wsi->parent, wsi->wsistate);
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if (user_callback_handle_rxflow(wsi->parent->protocol->callback,
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wsi->parent, LWS_CALLBACK_CGI,
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wsi->parent->user_space,
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(void *)&args, 0))
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return 1;
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return LWS_HPI_RET_HANDLED;
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}
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static int
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rops_handle_POLLOUT_cgi(struct lws *wsi)
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{
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return LWS_HP_RET_USER_SERVICE;
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}
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static int
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rops_destroy_role_cgi(struct lws *wsi)
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{
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#if defined(LWS_WITH_ZLIB)
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if (!wsi->http.cgi)
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return 0;
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if (!wsi->http.cgi->gzip_init)
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return 0;
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inflateEnd(&wsi->http.cgi->inflate);
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wsi->http.cgi->gzip_init = 0;
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#endif
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return 0;
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}
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static void
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lws_cgi_sul_cb(lws_sorted_usec_list_t *sul)
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{
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struct lws_context_per_thread *pt = lws_container_of(sul,
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struct lws_context_per_thread, sul_cgi);
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lws_cgi_kill_terminated(pt);
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__lws_sul_insert(&pt->pt_sul_owner, &pt->sul_cgi,
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3 * LWS_US_PER_SEC);
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}
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static int
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rops_pt_init_destroy_cgi(struct lws_context *context,
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const struct lws_context_creation_info *info,
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struct lws_context_per_thread *pt, int destroy)
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{
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if (!destroy) {
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pt->sul_cgi.cb = lws_cgi_sul_cb;
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__lws_sul_insert(&pt->pt_sul_owner, &pt->sul_cgi,
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3 * LWS_US_PER_SEC);
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} else
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lws_dll2_remove(&pt->sul_cgi.list);
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return 0;
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}
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const struct lws_role_ops role_ops_cgi = {
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/* role name */ "cgi",
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/* alpn id */ NULL,
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/* check_upgrades */ NULL,
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/* pt_init_destroy */ rops_pt_init_destroy_cgi,
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/* init_vhost */ NULL,
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/* destroy_vhost */ NULL,
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/* service_flag_pending */ NULL,
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/* handle_POLLIN */ rops_handle_POLLIN_cgi,
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/* handle_POLLOUT */ rops_handle_POLLOUT_cgi,
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/* perform_user_POLLOUT */ NULL,
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/* callback_on_writable */ NULL,
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/* tx_credit */ NULL,
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/* write_role_protocol */ NULL,
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/* encapsulation_parent */ NULL,
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/* alpn_negotiated */ NULL,
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/* close_via_role_protocol */ NULL,
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/* close_role */ NULL,
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/* close_kill_connection */ NULL,
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/* destroy_role */ rops_destroy_role_cgi,
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/* adoption_bind */ NULL,
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/* client_bind */ NULL,
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/* issue_keepalive */ NULL,
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/* adoption_cb clnt, srv */ { 0, 0 },
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/* rx_cb clnt, srv */ { 0, 0 },
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/* writeable cb clnt, srv */ { 0, 0 },
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/* close cb clnt, srv */ { 0, 0 },
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/* protocol_bind_cb c,s */ { 0, 0 },
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/* protocol_unbind_cb c,s */ { 0, 0 },
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/* file_handle */ 0,
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};
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