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f7149e90c2
https://libwebsockets.org/pipermail/libwebsockets/2019-April/007937.html thanks to Bruce Perens for noting it. This doesn't change the intention or status of the CC0 files, they were pure CC0 before (ie, public domain) and they are pure CC0 now. It just gets rid of the (C) part at the top of the dedication which may be read to be a bit contradictory since the purpose is to make it public domain.
148 lines
3.8 KiB
C
148 lines
3.8 KiB
C
/*
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* lws-minimal-http-server-form-get
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*
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* Written in 2010-2019 by Andy Green <andy@warmcat.com>
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*
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* This file is made available under the Creative Commons CC0 1.0
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* Universal Public Domain Dedication.
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*
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* This demonstrates a minimal http server that performs a form GET with a couple
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* of parameters. It dumps the parameters to the console log and redirects
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* to another page.
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*/
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#include <libwebsockets.h>
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#include <string.h>
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#include <signal.h>
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static int interrupted;
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static const char * param_names[] = {
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"text1",
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"send"
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};
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static int
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callback_http(struct lws *wsi, enum lws_callback_reasons reason, void *user,
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void *in, size_t len)
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{
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uint8_t buf[LWS_PRE + LWS_RECOMMENDED_MIN_HEADER_SPACE],
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*start = &buf[LWS_PRE], *p = start,
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*end = &buf[sizeof(buf) - 1];
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const char *val;
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int n;
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switch (reason) {
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case LWS_CALLBACK_HTTP:
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if (!lws_hdr_total_length(wsi, WSI_TOKEN_GET_URI))
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/* not a GET */
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break;
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lwsl_err("%s: %s\n", __func__, (const char *)in);
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if (strcmp((const char *)in, "/form1"))
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/* not our form URL */
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break;
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/* we just dump the decoded things to the log */
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for (n = 0; n < (int)LWS_ARRAY_SIZE(param_names); n++) {
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val = lws_get_urlarg_by_name(wsi, param_names[n],
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(char *)buf, sizeof(buf));
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if (!val)
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lwsl_user("%s: undefined\n", param_names[n]);
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else
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lwsl_user("%s: (len %d) '%s'\n", param_names[n],
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(int)strlen((const char *)buf),buf);
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}
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/*
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* Our response is to redirect to a static page. We could
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* have generated a dynamic html page here instead.
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*/
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if (lws_http_redirect(wsi, HTTP_STATUS_MOVED_PERMANENTLY,
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(unsigned char *)"after-form1.html",
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16, &p, end) < 0)
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return -1;
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break;
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default:
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break;
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}
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return lws_callback_http_dummy(wsi, reason, user, in, len);
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}
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static struct lws_protocols protocols[] = {
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{ "http", callback_http, 0, 0 },
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{ NULL, NULL, 0, 0 } /* terminator */
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};
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/* default mount serves the URL space from ./mount-origin */
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static const struct lws_http_mount mount = {
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/* .mount_next */ NULL, /* linked-list "next" */
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/* .mountpoint */ "/", /* mountpoint URL */
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/* .origin */ "./mount-origin", /* serve from dir */
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/* .def */ "index.html", /* default filename */
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/* .protocol */ NULL,
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/* .cgienv */ NULL,
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/* .extra_mimetypes */ NULL,
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/* .interpret */ NULL,
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/* .cgi_timeout */ 0,
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/* .cache_max_age */ 0,
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/* .auth_mask */ 0,
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/* .cache_reusable */ 0,
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/* .cache_revalidate */ 0,
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/* .cache_intermediaries */ 0,
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/* .origin_protocol */ LWSMPRO_FILE, /* files in a dir */
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/* .mountpoint_len */ 1, /* char count */
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/* .basic_auth_login_file */ NULL,
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};
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void sigint_handler(int sig)
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{
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interrupted = 1;
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}
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int main(int argc, const char **argv)
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{
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struct lws_context_creation_info info;
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struct lws_context *context;
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const char *p;
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int n = 0, logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE
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/* for LLL_ verbosity above NOTICE to be built into lws,
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* lws must have been configured and built with
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* -DCMAKE_BUILD_TYPE=DEBUG instead of =RELEASE */
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/* | LLL_INFO */ /* | LLL_PARSER */ /* | LLL_HEADER */
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/* | LLL_EXT */ /* | LLL_CLIENT */ /* | LLL_LATENCY */
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/* | LLL_DEBUG */;
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signal(SIGINT, sigint_handler);
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if ((p = lws_cmdline_option(argc, argv, "-d")))
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logs = atoi(p);
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lws_set_log_level(logs, NULL);
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lwsl_user("LWS minimal http server GET | visit http://localhost:7681\n");
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memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
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info.port = 7681;
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info.protocols = protocols;
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info.mounts = &mount;
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info.options =
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LWS_SERVER_OPTION_HTTP_HEADERS_SECURITY_BEST_PRACTICES_ENFORCE;
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context = lws_create_context(&info);
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if (!context) {
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lwsl_err("lws init failed\n");
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return 1;
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}
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while (n >= 0 && !interrupted)
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n = lws_service(context, 1000);
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lws_context_destroy(context);
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return 0;
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}
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