mirror of
https://github.com/warmcat/libwebsockets.git
synced 2025-03-23 00:00:06 +01:00
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.
219 lines
6.4 KiB
C
219 lines
6.4 KiB
C
/*
|
|
* lws-minimal-http-client hugeurl
|
|
*
|
|
* Written in 2010-2019 by Andy Green <andy@warmcat.com>
|
|
*
|
|
* This file is made available under the Creative Commons CC0 1.0
|
|
* Universal Public Domain Dedication.
|
|
*
|
|
* This demonstrates the a minimal http client using lws.
|
|
*
|
|
* It visits https://warmcat.com/?fakeparam=<2KB> and receives the html
|
|
* page there. You can dump the page data by changing the #if 0 below.
|
|
*/
|
|
|
|
#include <libwebsockets.h>
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
|
|
static int interrupted, bad = 1, status;
|
|
static struct lws *client_wsi;
|
|
|
|
static const char * const uri =
|
|
"/?fakeparam="
|
|
"00000000000000000000000000000000000000000000000000"
|
|
"00000000000000000000000000000000000000000000000000"
|
|
"00000000000000000000000000000000000000000000000000"
|
|
"00000000000000000000000000000000000000000000000000"
|
|
"00000000000000000000000000000000000000000000000000"
|
|
"00000000000000000000000000000000000000000000000000"
|
|
"00000000000000000000000000000000000000000000000000"
|
|
"00000000000000000000000000000000000000000000000000"
|
|
"00000000000000000000000000000000000000000000000000"
|
|
"00000000000000000000000000000000000000000000000000" /* 500 */
|
|
"11111111111111111111111111111111111111111111111111"
|
|
"11111111111111111111111111111111111111111111111111"
|
|
"11111111111111111111111111111111111111111111111111"
|
|
"11111111111111111111111111111111111111111111111111"
|
|
"11111111111111111111111111111111111111111111111111"
|
|
"11111111111111111111111111111111111111111111111111"
|
|
"11111111111111111111111111111111111111111111111111"
|
|
"11111111111111111111111111111111111111111111111111"
|
|
"11111111111111111111111111111111111111111111111111"
|
|
"11111111111111111111111111111111111111111111111111" /* 1000 */
|
|
"22222222222222222222222222222222222222222222222222"
|
|
"22222222222222222222222222222222222222222222222222"
|
|
"22222222222222222222222222222222222222222222222222"
|
|
"22222222222222222222222222222222222222222222222222"
|
|
"22222222222222222222222222222222222222222222222222"
|
|
"22222222222222222222222222222222222222222222222222"
|
|
"22222222222222222222222222222222222222222222222222"
|
|
"22222222222222222222222222222222222222222222222222"
|
|
"22222222222222222222222222222222222222222222222222"
|
|
"22222222222222222222222222222222222222222222222222" /* 1500 */
|
|
"33333333333333333333333333333333333333333333333333"
|
|
"33333333333333333333333333333333333333333333333333"
|
|
"33333333333333333333333333333333333333333333333333"
|
|
"33333333333333333333333333333333333333333333333333"
|
|
"33333333333333333333333333333333333333333333333333"
|
|
"33333333333333333333333333333333333333333333333333"
|
|
"33333333333333333333333333333333333333333333333333"
|
|
"33333333333333333333333333333333333333333333333333"
|
|
"33333333333333333333333333333333333333333333333333"
|
|
"33333333333333333333333333333333333333333333333333" /* 2000 */
|
|
;
|
|
|
|
static int
|
|
callback_http(struct lws *wsi, enum lws_callback_reasons reason,
|
|
void *user, void *in, size_t len)
|
|
{
|
|
switch (reason) {
|
|
|
|
/* because we are protocols[0] ... */
|
|
case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
|
|
lwsl_err("CLIENT_CONNECTION_ERROR: %s\n",
|
|
in ? (char *)in : "(null)");
|
|
client_wsi = NULL;
|
|
break;
|
|
|
|
case LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP:
|
|
status = lws_http_client_http_response(wsi);
|
|
lwsl_user("Connected with server response: %d\n", status);
|
|
break;
|
|
|
|
/* chunks of chunked content, with header removed */
|
|
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ:
|
|
lwsl_user("RECEIVE_CLIENT_HTTP_READ: read %d\n", (int)len);
|
|
#if 0 /* enable to dump the html */
|
|
{
|
|
const char *p = in;
|
|
|
|
while (len--)
|
|
if (*p < 0x7f)
|
|
putchar(*p++);
|
|
else
|
|
putchar('.');
|
|
}
|
|
#endif
|
|
return 0; /* don't passthru */
|
|
|
|
/* uninterpreted http content */
|
|
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP:
|
|
{
|
|
char buffer[1024 + LWS_PRE];
|
|
char *px = buffer + LWS_PRE;
|
|
int lenx = sizeof(buffer) - LWS_PRE;
|
|
|
|
if (lws_http_client_read(wsi, &px, &lenx) < 0)
|
|
return -1;
|
|
}
|
|
return 0; /* don't passthru */
|
|
|
|
case LWS_CALLBACK_COMPLETED_CLIENT_HTTP:
|
|
client_wsi = NULL;
|
|
bad = status != 200;
|
|
lws_cancel_service(lws_get_context(wsi)); /* abort poll wait */
|
|
break;
|
|
|
|
case LWS_CALLBACK_CLOSED_CLIENT_HTTP:
|
|
client_wsi = NULL;
|
|
bad = status != 200;
|
|
lws_cancel_service(lws_get_context(wsi)); /* abort poll wait */
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return lws_callback_http_dummy(wsi, reason, user, in, len);
|
|
}
|
|
|
|
static const struct lws_protocols protocols[] = {
|
|
{
|
|
"http",
|
|
callback_http,
|
|
0,
|
|
0,
|
|
},
|
|
{ NULL, NULL, 0, 0 }
|
|
};
|
|
|
|
static void
|
|
sigint_handler(int sig)
|
|
{
|
|
interrupted = 1;
|
|
}
|
|
|
|
int main(int argc, const char **argv)
|
|
{
|
|
struct lws_context_creation_info info;
|
|
struct lws_client_connect_info i;
|
|
struct lws_context *context;
|
|
const char *p;
|
|
int n = 0, logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE
|
|
/* for LLL_ verbosity above NOTICE to be built into lws,
|
|
* lws must have been configured and built with
|
|
* -DCMAKE_BUILD_TYPE=DEBUG instead of =RELEASE */
|
|
/* | LLL_INFO */ /* | LLL_PARSER */ /* | LLL_HEADER */
|
|
/* | LLL_EXT */ /* | LLL_CLIENT */ /* | LLL_LATENCY */
|
|
/* | LLL_DEBUG */;
|
|
|
|
if ((p = lws_cmdline_option(argc, argv, "-d")))
|
|
logs = atoi(p);
|
|
|
|
signal(SIGINT, sigint_handler);
|
|
lws_set_log_level(logs, NULL);
|
|
lwsl_user("LWS minimal http client hugeurl [-d <verbosity>] [-l] [--h1]\n");
|
|
|
|
memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
|
|
info.options = LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
|
|
info.port = CONTEXT_PORT_NO_LISTEN; /* we do not run any server */
|
|
info.protocols = protocols;
|
|
|
|
#if defined(LWS_WITH_MBEDTLS)
|
|
/*
|
|
* OpenSSL uses the system trust store. mbedTLS has to be told which
|
|
* CA to trust explicitly.
|
|
*/
|
|
info.client_ssl_ca_filepath = "./warmcat.com.cer";
|
|
#endif
|
|
|
|
context = lws_create_context(&info);
|
|
if (!context) {
|
|
lwsl_err("lws init failed\n");
|
|
return 1;
|
|
}
|
|
|
|
memset(&i, 0, sizeof i); /* otherwise uninitialized garbage */
|
|
i.context = context;
|
|
i.ssl_connection = LCCSCF_USE_SSL;
|
|
|
|
if (lws_cmdline_option(argc, argv, "-l")) {
|
|
i.port = 7681;
|
|
i.address = "localhost";
|
|
i.ssl_connection |= LCCSCF_ALLOW_SELFSIGNED;
|
|
} else {
|
|
i.port = 443;
|
|
i.address = "warmcat.com";
|
|
}
|
|
|
|
if (lws_cmdline_option(argc, argv, "--h1"))
|
|
i.alpn = "http/1.1";
|
|
|
|
i.path = uri;
|
|
i.host = i.address;
|
|
i.origin = i.address;
|
|
i.method = "GET";
|
|
i.protocol = protocols[0].name;
|
|
i.pwsi = &client_wsi;
|
|
|
|
lws_client_connect_via_info(&i);
|
|
|
|
while (n >= 0 && client_wsi && !interrupted)
|
|
n = lws_service(context, 1000);
|
|
|
|
lws_context_destroy(context);
|
|
lwsl_user("Completed: %s\n", bad? "failed": "OK");
|
|
|
|
return bad;
|
|
}
|