mirror of
https://github.com/warmcat/libwebsockets.git
synced 2025-03-23 00:00:06 +01:00
c9731c5f17
This is a huge patch that should be a global NOP. For unix type platforms it enables -Wconversion to issue warnings (-> error) for all automatic casts that seem less than ideal but are normally concealed by the toolchain. This is things like passing an int to a size_t argument. Once enabled, I went through all args on my default build (which build most things) and tried to make the removed default cast explicit. With that approach it neither change nor bloat the code, since it compiles to whatever it was doing before, just with the casts made explicit... in a few cases I changed some length args from int to size_t but largely left the causes alone. From now on, new code that is relying on less than ideal casting will complain and nudge me to improve it by warnings.
222 lines
6.4 KiB
C
222 lines
6.4 KiB
C
/*
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* lws-minimal-http-client hugeurl
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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 the a minimal http client using lws.
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*
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* It visits https://warmcat.com/?fakeparam=<2KB> and receives the html
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* page there. You can dump the page data by changing the #if 0 below.
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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, bad = 1, status;
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static struct lws *client_wsi;
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static const char * const uri =
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"/?fakeparam="
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000" /* 500 */
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"11111111111111111111111111111111111111111111111111"
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"11111111111111111111111111111111111111111111111111"
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"11111111111111111111111111111111111111111111111111"
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"11111111111111111111111111111111111111111111111111"
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"11111111111111111111111111111111111111111111111111"
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"11111111111111111111111111111111111111111111111111"
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"11111111111111111111111111111111111111111111111111"
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"11111111111111111111111111111111111111111111111111"
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"11111111111111111111111111111111111111111111111111"
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"11111111111111111111111111111111111111111111111111" /* 1000 */
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"22222222222222222222222222222222222222222222222222"
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"22222222222222222222222222222222222222222222222222"
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"22222222222222222222222222222222222222222222222222"
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"22222222222222222222222222222222222222222222222222"
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"22222222222222222222222222222222222222222222222222"
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"22222222222222222222222222222222222222222222222222"
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"22222222222222222222222222222222222222222222222222"
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"22222222222222222222222222222222222222222222222222"
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"22222222222222222222222222222222222222222222222222"
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"22222222222222222222222222222222222222222222222222" /* 1500 */
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"33333333333333333333333333333333333333333333333333"
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"33333333333333333333333333333333333333333333333333"
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"33333333333333333333333333333333333333333333333333"
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"33333333333333333333333333333333333333333333333333"
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"33333333333333333333333333333333333333333333333333"
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"33333333333333333333333333333333333333333333333333"
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"33333333333333333333333333333333333333333333333333"
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"33333333333333333333333333333333333333333333333333"
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"33333333333333333333333333333333333333333333333333"
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"33333333333333333333333333333333333333333333333333" /* 2000 */
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;
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static int
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callback_http(struct lws *wsi, enum lws_callback_reasons reason,
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void *user, void *in, size_t len)
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{
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switch (reason) {
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/* because we are protocols[0] ... */
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case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
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lwsl_err("CLIENT_CONNECTION_ERROR: %s\n",
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in ? (char *)in : "(null)");
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client_wsi = NULL;
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break;
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case LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP:
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status = (int)lws_http_client_http_response(wsi);
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lwsl_user("Connected with server response: %d\n", status);
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break;
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/* chunks of chunked content, with header removed */
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case LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ:
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lwsl_user("RECEIVE_CLIENT_HTTP_READ: read %d\n", (int)len);
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#if 0 /* enable to dump the html */
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{
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const char *p = in;
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while (len--)
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if (*p < 0x7f)
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putchar(*p++);
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else
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putchar('.');
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}
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#endif
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return 0; /* don't passthru */
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/* uninterpreted http content */
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case LWS_CALLBACK_RECEIVE_CLIENT_HTTP:
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{
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char buffer[1024 + LWS_PRE];
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char *px = buffer + LWS_PRE;
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int lenx = sizeof(buffer) - LWS_PRE;
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if (lws_http_client_read(wsi, &px, &lenx) < 0)
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return -1;
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}
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return 0; /* don't passthru */
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case LWS_CALLBACK_COMPLETED_CLIENT_HTTP:
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client_wsi = NULL;
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bad = status != 200;
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lws_cancel_service(lws_get_context(wsi)); /* abort poll wait */
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break;
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case LWS_CALLBACK_CLOSED_CLIENT_HTTP:
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client_wsi = NULL;
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bad = status != 200;
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lws_cancel_service(lws_get_context(wsi)); /* abort poll wait */
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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 const struct lws_protocols protocols[] = {
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{
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"http",
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callback_http,
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0,
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0,
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},
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{ NULL, NULL, 0, 0 }
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};
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static void
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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_client_connect_info i;
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struct lws_context *context;
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int n = 0;
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signal(SIGINT, sigint_handler);
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memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
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lws_cmdline_option_handle_builtin(argc, argv, &info);
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lwsl_user("LWS minimal http client hugeurl [-d <verbosity>] [-l] [--h1]\n");
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info.options = LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
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info.port = CONTEXT_PORT_NO_LISTEN; /* we do not run any server */
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info.protocols = protocols;
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info.pt_serv_buf_size = 8192;
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info.timeout_secs = 10;
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info.connect_timeout_secs = 30;
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/*
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* since we know this lws context is only ever going to be used with
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* one client wsis / fds / sockets at a time, let lws know it doesn't
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* have to use the default allocations for fd tables up to ulimit -n.
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* It will just allocate for 1 internal and 1 (+ 1 http2 nwsi) that we
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* will use.
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*/
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info.fd_limit_per_thread = 1 + 1 + 1;
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#if defined(LWS_WITH_MBEDTLS) || defined(USE_WOLFSSL)
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/*
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* OpenSSL uses the system trust store. mbedTLS has to be told which
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* CA to trust explicitly.
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*/
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info.client_ssl_ca_filepath = "./warmcat.com.cer";
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#endif
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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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memset(&i, 0, sizeof i); /* otherwise uninitialized garbage */
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i.context = context;
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i.ssl_connection = LCCSCF_USE_SSL;
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if (lws_cmdline_option(argc, argv, "-l")) {
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i.port = 7681;
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i.address = "localhost";
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i.ssl_connection |= LCCSCF_ALLOW_SELFSIGNED;
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} else {
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i.port = 443;
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i.address = "warmcat.com";
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}
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if (lws_cmdline_option(argc, argv, "--h1"))
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i.alpn = "http/1.1";
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i.path = uri;
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i.host = i.address;
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i.origin = i.address;
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i.method = "GET";
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i.protocol = protocols[0].name;
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i.pwsi = &client_wsi;
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lws_client_connect_via_info(&i);
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while (n >= 0 && client_wsi && !interrupted)
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n = lws_service(context, 0);
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lws_context_destroy(context);
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lwsl_user("Completed: %s\n", bad? "failed": "OK");
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return bad;
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}
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