mirror of
https://github.com/warmcat/libwebsockets.git
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d9f982a055
1) update the logos to svg 2) add svg icon for strict security policy where used 3) define new vhost option flag to enforce sending CSP headers with the result code 4) add vhost option flag to minimal examples to enforce sending CSP where applicable 5) Go through all the affecting examples confirming they still work 6) add LWS_RECOMMENDED_MIN_HEADER_SPACE constant (currently 2048) to clarify when we need a buffer to hold headers... with CSP the headers have become potentially a lot larger.
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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* Copyright (C) 2018 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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