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civetweb/examples/embedded_c/embedded_c.c

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/*
* Copyright (c) 2013-2017 the CivetWeb developers
* Copyright (c) 2013 No Face Press, LLC
* License http://opensource.org/licenses/mit-license.php MIT License
*/
/* Simple example program on how to use CivetWeb embedded into a C program. */
#ifdef _WIN32
#include <windows.h>
#else
#include <unistd.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "civetweb.h"
#define DOCUMENT_ROOT "."
#ifdef NO_SSL
#ifdef USE_IPV6
#define PORT "[::]:8888,8884"
#else
#define PORT "8888,8884"
#endif
#else
#ifdef USE_IPV6
#define PORT "[::]:8888r,[::]:8843s,8884"
#else
#define PORT "8888r,8843s,8884"
#endif
#endif
#define EXAMPLE_URI "/example"
#define EXIT_URI "/exit"
int exitNow = 0;
int
ExampleHandler(struct mg_connection *conn, void *cbdata)
{
mg_printf(conn,
"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: "
"close\r\n\r\n");
mg_printf(conn, "<html><body>");
mg_printf(conn, "<h2>This is an example text from a C handler</h2>");
mg_printf(
conn,
"<p>To see a page from the A handler <a href=\"A\">click A</a></p>");
mg_printf(conn,
"<p>To see a page from the A handler <a href=\"A/A\">click "
"A/A</a></p>");
mg_printf(conn,
"<p>To see a page from the A/B handler <a "
"href=\"A/B\">click A/B</a></p>");
mg_printf(conn,
"<p>To see a page from the B handler (0) <a "
"href=\"B\">click B</a></p>");
mg_printf(conn,
"<p>To see a page from the B handler (1) <a "
"href=\"B/A\">click B/A</a></p>");
mg_printf(conn,
"<p>To see a page from the B handler (2) <a "
"href=\"B/B\">click B/B</a></p>");
mg_printf(conn,
"<p>To see a page from the *.foo handler <a "
"href=\"xy.foo\">click xy.foo</a></p>");
mg_printf(conn,
"<p>To see a page from the close handler <a "
"href=\"close\">click close</a></p>");
mg_printf(conn,
"<p>To see a page from the FileHandler handler <a "
"href=\"form\">click form</a> (the starting point of the "
"<b>form</b> test)</p>");
mg_printf(conn,
"<p>To see a page from the CookieHandler handler <a "
"href=\"cookie\">click cookie</a></p>");
mg_printf(conn,
"<p>To see a page from the PostResponser handler <a "
"href=\"postresponse\">click post response</a></p>");
mg_printf(conn,
"<p>To see an example for parsing files on the fly <a "
"href=\"on_the_fly_form\">click form</a> (form for "
"uploading files)</p>");
#ifdef USE_WEBSOCKET
mg_printf(conn,
"<p>To test the websocket handler <a href=\"/websocket\">click "
"websocket</a></p>");
#endif
mg_printf(conn,
"<p>To test the authentication handler <a href=\"/auth\">click "
"auth</a></p>");
mg_printf(conn, "<p>To exit <a href=\"%s\">click exit</a></p>", EXIT_URI);
mg_printf(conn, "</body></html>\n");
return 1;
}
int
ExitHandler(struct mg_connection *conn, void *cbdata)
{
mg_printf(conn,
"HTTP/1.1 200 OK\r\nContent-Type: "
"text/plain\r\nConnection: close\r\n\r\n");
mg_printf(conn, "Server will shut down.\n");
mg_printf(conn, "Bye!\n");
exitNow = 1;
return 1;
}
int
AHandler(struct mg_connection *conn, void *cbdata)
{
mg_printf(conn,
"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: "
"close\r\n\r\n");
mg_printf(conn, "<html><body>");
mg_printf(conn, "<h2>This is the A handler!!!</h2>");
mg_printf(conn, "</body></html>\n");
return 1;
}
int
ABHandler(struct mg_connection *conn, void *cbdata)
{
mg_printf(conn,
"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: "
"close\r\n\r\n");
mg_printf(conn, "<html><body>");
mg_printf(conn, "<h2>This is the AB handler!!!</h2>");
mg_printf(conn, "</body></html>\n");
return 1;
}
int
BXHandler(struct mg_connection *conn, void *cbdata)
{
/* Handler may access the request info using mg_get_request_info */
const struct mg_request_info *req_info = mg_get_request_info(conn);
mg_printf(conn,
"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: "
"close\r\n\r\n");
mg_printf(conn, "<html><body>");
mg_printf(conn, "<h2>This is the BX handler %p!!!</h2>", cbdata);
mg_printf(conn, "<p>The actual uri is %s</p>", req_info->local_uri);
mg_printf(conn, "</body></html>\n");
return 1;
}
int
FooHandler(struct mg_connection *conn, void *cbdata)
{
/* Handler may access the request info using mg_get_request_info */
const struct mg_request_info *req_info = mg_get_request_info(conn);
mg_printf(conn,
"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: "
"close\r\n\r\n");
mg_printf(conn, "<html><body>");
mg_printf(conn, "<h2>This is the Foo handler!!!</h2>");
mg_printf(conn,
"<p>The request was:<br><pre>%s %s HTTP/%s</pre></p>",
req_info->request_method,
req_info->local_uri,
req_info->http_version);
mg_printf(conn, "</body></html>\n");
return 1;
}
int
CloseHandler(struct mg_connection *conn, void *cbdata)
{
/* Handler may access the request info using mg_get_request_info */
const struct mg_request_info *req_info = mg_get_request_info(conn);
mg_printf(conn,
"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: "
"close\r\n\r\n");
mg_printf(conn, "<html><body>");
mg_printf(conn,
"<h2>This handler will close the connection in a second</h2>");
#ifdef _WIN32
Sleep(1000);
#else
sleep(1);
#endif
mg_printf(conn, "bye");
printf("CloseHandler: close connection\n");
mg_close_connection(conn);
printf("CloseHandler: wait 10 sec\n");
#ifdef _WIN32
Sleep(10000);
#else
sleep(10);
#endif
printf("CloseHandler: return from function\n");
return 1;
}
int
FileHandler(struct mg_connection *conn, void *cbdata)
{
/* In this handler, we ignore the req_info and send the file "fileName". */
const char *fileName = (const char *)cbdata;
mg_send_file(conn, fileName);
return 1;
}
int
field_found(const char *key,
const char *filename,
char *path,
size_t pathlen,
void *user_data)
{
struct mg_connection *conn = (struct mg_connection *)user_data;
mg_printf(conn, "\r\n\r\n%s:\r\n", key);
if (filename && *filename) {
#ifdef _WIN32
_snprintf(path, pathlen, "D:\\tmp\\%s", filename);
#else
snprintf(path, pathlen, "/tmp/%s", filename);
#endif
return MG_FORM_FIELD_STORAGE_STORE;
}
return MG_FORM_FIELD_STORAGE_GET;
}
int
field_get(const char *key, const char *value, size_t valuelen, void *user_data)
{
struct mg_connection *conn = (struct mg_connection *)user_data;
if (key[0]) {
mg_printf(conn, "%s = ", key);
}
mg_write(conn, value, valuelen);
return 0;
}
int
field_stored(const char *path, long long file_size, void *user_data)
{
struct mg_connection *conn = (struct mg_connection *)user_data;
mg_printf(conn,
"stored as %s (%lu bytes)\r\n\r\n",
path,
(unsigned long)file_size);
return 0;
}
int
FormHandler(struct mg_connection *conn, void *cbdata)
{
/* Handler may access the request info using mg_get_request_info */
const struct mg_request_info *req_info = mg_get_request_info(conn);
int ret;
struct mg_form_data_handler fdh = {field_found, field_get, field_stored, 0};
/* It would be possible to check the request info here before calling
* mg_handle_form_request. */
(void)req_info;
mg_printf(conn,
"HTTP/1.1 200 OK\r\nContent-Type: "
"text/plain\r\nConnection: close\r\n\r\n");
fdh.user_data = (void *)conn;
/* Call the form handler */
mg_printf(conn, "Form data:");
ret = mg_handle_form_request(conn, &fdh);
mg_printf(conn, "\r\n%i fields found", ret);
return 1;
}
int
FileUploadForm(struct mg_connection *conn, void *cbdata)
{
mg_printf(conn,
"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: "
"close\r\n\r\n");
mg_printf(conn, "<!DOCTYPE html>\n");
mg_printf(conn, "<html>\n<head>\n");
mg_printf(conn, "<meta charset=\"UTF-8\">\n");
mg_printf(conn, "<title>File upload</title>\n");
mg_printf(conn, "</head>\n<body>\n");
mg_printf(conn,
"<form action=\"%s\" method=\"POST\" "
"enctype=\"multipart/form-data\">\n",
(const char *)cbdata);
mg_printf(conn, "<input type=\"file\" name=\"filesin\" multiple>\n");
mg_printf(conn, "<input type=\"submit\" value=\"Submit\">\n");
mg_printf(conn, "</form>\n</body>\n</html>\n");
return 1;
}
#define MD5_STATIC static
#include "../src/md5.inl"
struct tfile_checksum {
char name[128];
unsigned long long length;
md5_state_t chksum;
};
#define MAX_FILES (10)
struct tfiles_checksums {
int index;
struct tfile_checksum file[MAX_FILES];
};
int
field_disp_read_on_the_fly(const char *key,
const char *filename,
char *path,
size_t pathlen,
void *user_data)
{
struct tfiles_checksums *context = (struct tfiles_checksums *)user_data;
(void)key;
(void)path;
(void)pathlen;
if (context->index < MAX_FILES) {
context->index++;
strncpy(context->file[context->index - 1].name, filename, 128);
context->file[context->index - 1].name[127] = 0;
context->file[context->index - 1].length = 0;
md5_init(&(context->file[context->index - 1].chksum));
return MG_FORM_FIELD_STORAGE_GET;
}
return MG_FORM_FIELD_STORAGE_ABORT;
}
int
field_get_checksum(const char *key,
const char *value,
size_t valuelen,
void *user_data)
{
struct tfiles_checksums *context = (struct tfiles_checksums *)user_data;
(void)key;
context->file[context->index - 1].length += valuelen;
md5_append(&(context->file[context->index - 1].chksum),
(const md5_byte_t *)value,
valuelen);
return 0;
}
int
CheckSumHandler(struct mg_connection *conn, void *cbdata)
{
/* Handler may access the request info using mg_get_request_info */
const struct mg_request_info *req_info = mg_get_request_info(conn);
int i, j, ret;
struct tfiles_checksums chksums;
md5_byte_t digest[16];
struct mg_form_data_handler fdh = {field_disp_read_on_the_fly,
field_get_checksum,
0,
(void *)&chksums};
/* It would be possible to check the request info here before calling
* mg_handle_form_request. */
(void)req_info;
memset(&chksums, 0, sizeof(chksums));
mg_printf(conn,
"HTTP/1.1 200 OK\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n");
/* Call the form handler */
mg_printf(conn, "File checksums:");
ret = mg_handle_form_request(conn, &fdh);
for (i = 0; i < chksums.index; i++) {
md5_finish(&(chksums.file[i].chksum), digest);
/* Visual Studio 2010+ support llu */
mg_printf(conn,
"\r\n%s %llu ",
chksums.file[i].name,
chksums.file[i].length);
for (j = 0; j < 16; j++) {
mg_printf(conn, "%02x", (unsigned int)digest[j]);
}
}
mg_printf(conn, "\r\n%i files\r\n", ret);
return 1;
}
int
CookieHandler(struct mg_connection *conn, void *cbdata)
{
/* Handler may access the request info using mg_get_request_info */
const struct mg_request_info *req_info = mg_get_request_info(conn);
const char *cookie = mg_get_header(conn, "Cookie");
char first_str[64], count_str[64];
int count;
(void)mg_get_cookie(cookie, "first", first_str, sizeof(first_str));
(void)mg_get_cookie(cookie, "count", count_str, sizeof(count_str));
mg_printf(conn, "HTTP/1.1 200 OK\r\nConnection: close\r\n");
if (first_str[0] == 0) {
time_t t = time(0);
struct tm *ptm = localtime(&t);
mg_printf(conn,
"Set-Cookie: first=%04i-%02i-%02iT%02i:%02i:%02i\r\n",
ptm->tm_year + 1900,
ptm->tm_mon + 1,
ptm->tm_mday,
ptm->tm_hour,
ptm->tm_min,
ptm->tm_sec);
}
count = (count_str[0] == 0) ? 0 : atoi(count_str);
mg_printf(conn, "Set-Cookie: count=%i\r\n", count + 1);
mg_printf(conn, "Content-Type: text/html\r\n\r\n");
mg_printf(conn, "<html><body>");
mg_printf(conn, "<h2>This is the CookieHandler.</h2>");
mg_printf(conn, "<p>The actual uri is %s</p>", req_info->local_uri);
if (first_str[0] == 0) {
mg_printf(conn, "<p>This is the first time, you opened this page</p>");
} else {
mg_printf(conn, "<p>You opened this page %i times before.</p>", count);
mg_printf(conn, "<p>You first opened this page on %s.</p>", first_str);
}
mg_printf(conn, "</body></html>\n");
return 1;
}
int
PostResponser(struct mg_connection *conn, void *cbdata)
{
long long r_total = 0;
int r, s;
char buf[2048];
const struct mg_request_info *ri = mg_get_request_info(conn);
if (strcmp(ri->request_method, "POST")) {
char buf[1024];
int ret = mg_get_request_link(conn, buf, sizeof(buf));
mg_printf(conn,
"HTTP/1.1 405 Method Not Allowed\r\nConnection: close\r\n");
mg_printf(conn, "Content-Type: text/plain\r\n\r\n");
mg_printf(conn,
"%s method not allowed in the POST handler\n",
ri->request_method);
if (ret >= 0) {
mg_printf(conn,
"use a web tool to send a POST request to %s\n",
buf);
}
return 1;
}
if (ri->content_length >= 0) {
/* We know the content length in advance */
} else {
/* We must read until we find the end (chunked encoding
* or connection close), indicated my mg_read returning 0 */
}
mg_printf(conn,
"HTTP/1.1 200 OK\r\nConnection: "
"close\r\nTransfer-Encoding: chunked\r\n");
mg_printf(conn, "Content-Type: text/plain\r\n\r\n");
r = mg_read(conn, buf, sizeof(buf));
while (r > 0) {
r_total += r;
s = mg_send_chunk(conn, buf, r);
if (r != s) {
/* Send error */
break;
}
r = mg_read(conn, buf, sizeof(buf));
}
mg_printf(conn, "0\r\n");
return 1;
}
int
AuthStartHandler(struct mg_connection *conn, void *cbdata)
{
static unsigned long long firstload = 0;
const char *passfile = "password_example_file.txt";
const char *realm = "password_example";
const char *user = "user";
char passwd[64];
if (firstload == 0) {
/* Set a random password (4 digit number - bad idea from a security
* point of view, but this is an API demo, not a security tutorial),
* and store it in some directory within the document root (extremely
* bad idea, but this is still not a security tutorial).
* The reason we create a new password every time the server starts
* is just for demonstration - we don't want the browser to store the
* password, so when we repeat the test we start with a new password.
*/
firstload = (unsigned long long)time(NULL);
sprintf(passwd, "%04u", (unsigned int)(firstload % 10000));
mg_modify_passwords_file(passfile, realm, user, passwd);
/* Just tell the user the new password generated for this test. */
mg_printf(conn,
"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: "
"close\r\n\r\n");
mg_printf(conn, "<!DOCTYPE html>\n");
mg_printf(conn, "<html>\n<head>\n");
mg_printf(conn, "<meta charset=\"UTF-8\">\n");
mg_printf(conn, "<title>Auth handlerexample</title>\n");
mg_printf(conn, "</head>\n");
mg_printf(conn, "<body>\n");
mg_printf(conn,
"<p>The first time you visit this page, it's free!</p>\n");
mg_printf(conn,
"<p>Next time, use username \"%s\" and password \"%s\"</p>\n",
user,
passwd);
mg_printf(conn, "</body>\n</html>\n");
return 1;
}
if (mg_check_digest_access_authentication(conn, realm, passfile) <= 0) {
/* No valid authorization */
mg_send_digest_access_authentication_request(conn, realm);
return 1;
}
mg_printf(conn,
"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: "
"close\r\n\r\n");
mg_printf(conn, "<!DOCTYPE html>\n");
mg_printf(conn, "<html>\n<head>\n");
mg_printf(conn, "<meta charset=\"UTF-8\">\n");
mg_printf(conn, "<title>Auth handlerexample</title>\n");
mg_printf(conn, "</head>\n");
mg_printf(conn, "<body>\n");
mg_printf(conn, "<p>This is the password protected contents</p>\n");
mg_printf(conn, "</body>\n</html>\n");
return 1;
}
int
WebSocketStartHandler(struct mg_connection *conn, void *cbdata)
{
mg_printf(conn,
"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: "
"close\r\n\r\n");
mg_printf(conn, "<!DOCTYPE html>\n");
mg_printf(conn, "<html>\n<head>\n");
mg_printf(conn, "<meta charset=\"UTF-8\">\n");
mg_printf(conn, "<title>Embedded websocket example</title>\n");
#ifdef USE_WEBSOCKET
/* mg_printf(conn, "<script type=\"text/javascript\"><![CDATA[\n"); ...
* xhtml style */
mg_printf(conn, "<script>\n");
mg_printf(
conn,
"function load() {\n"
" var wsproto = (location.protocol === 'https:') ? 'wss:' : 'ws:';\n"
" connection = new WebSocket(wsproto + '//' + window.location.host + "
"'/websocket');\n"
" websock_text_field = "
"document.getElementById('websock_text_field');\n"
" connection.onmessage = function (e) {\n"
" websock_text_field.innerHTML=e.data;\n"
" }\n"
" connection.onerror = function (error) {\n"
" alert('WebSocket error');\n"
" connection.close();\n"
" }\n"
"}\n");
/* mg_printf(conn, "]]></script>\n"); ... xhtml style */
mg_printf(conn, "</script>\n");
mg_printf(conn, "</head>\n<body onload=\"load()\">\n");
mg_printf(
conn,
"<div id='websock_text_field'>No websocket connection yet</div>\n");
#else
mg_printf(conn, "</head>\n<body>\n");
mg_printf(conn, "Example not compiled with USE_WEBSOCKET\n");
#endif
mg_printf(conn, "</body>\n</html>\n");
return 1;
}
#ifdef USE_WEBSOCKET
/* MAX_WS_CLIENTS defines how many clients can connect to a websocket at the
* same time. The value 5 is very small and used here only for demonstration;
* it can be easily tested to connect more than MAX_WS_CLIENTS clients.
* A real server should use a much higher number, or better use a dynamic list
* of currently connected websocket clients. */
#define MAX_WS_CLIENTS (5)
struct t_ws_client {
struct mg_connection *conn;
int state;
} static ws_clients[MAX_WS_CLIENTS];
#define ASSERT(x) \
{ \
if (!(x)) { \
fprintf(stderr, \
"Assertion failed in line %u\n", \
(unsigned)__LINE__); \
} \
}
int
WebSocketConnectHandler(const struct mg_connection *conn, void *cbdata)
{
struct mg_context *ctx = mg_get_context(conn);
int reject = 1;
int i;
mg_lock_context(ctx);
for (i = 0; i < MAX_WS_CLIENTS; i++) {
if (ws_clients[i].conn == NULL) {
ws_clients[i].conn = (struct mg_connection *)conn;
ws_clients[i].state = 1;
mg_set_user_connection_data(ws_clients[i].conn,
(void *)(ws_clients + i));
reject = 0;
break;
}
}
mg_unlock_context(ctx);
fprintf(stdout,
"Websocket client %s\r\n\r\n",
(reject ? "rejected" : "accepted"));
return reject;
}
void
WebSocketReadyHandler(struct mg_connection *conn, void *cbdata)
{
const char *text = "Hello from the websocket ready handler";
struct t_ws_client *client = mg_get_user_connection_data(conn);
mg_websocket_write(conn, MG_WEBSOCKET_OPCODE_TEXT, text, strlen(text));
fprintf(stdout, "Greeting message sent to websocket client\r\n\r\n");
ASSERT(client->conn == conn);
ASSERT(client->state == 1);
client->state = 2;
}
int
WebsocketDataHandler(struct mg_connection *conn,
int bits,
char *data,
size_t len,
void *cbdata)
{
struct t_ws_client *client = mg_get_user_connection_data(conn);
ASSERT(client->conn == conn);
ASSERT(client->state >= 1);
fprintf(stdout, "Websocket got %lu bytes of ", (unsigned long)len);
switch (((unsigned char)bits) & 0x0F) {
case MG_WEBSOCKET_OPCODE_CONTINUATION:
fprintf(stdout, "continuation");
break;
case MG_WEBSOCKET_OPCODE_TEXT:
fprintf(stdout, "text");
break;
case MG_WEBSOCKET_OPCODE_BINARY:
fprintf(stdout, "binary");
break;
case MG_WEBSOCKET_OPCODE_CONNECTION_CLOSE:
fprintf(stdout, "close");
break;
case MG_WEBSOCKET_OPCODE_PING:
fprintf(stdout, "ping");
break;
case MG_WEBSOCKET_OPCODE_PONG:
fprintf(stdout, "pong");
break;
default:
fprintf(stdout, "unknown(%1xh)", ((unsigned char)bits) & 0x0F);
break;
}
fprintf(stdout, " data:\r\n");
fwrite(data, len, 1, stdout);
fprintf(stdout, "\r\n\r\n");
return 1;
}
void
WebSocketCloseHandler(const struct mg_connection *conn, void *cbdata)
{
struct mg_context *ctx = mg_get_context(conn);
struct t_ws_client *client = mg_get_user_connection_data(conn);
ASSERT(client->conn == conn);
ASSERT(client->state >= 1);
mg_lock_context(ctx);
client->state = 0;
client->conn = NULL;
mg_unlock_context(ctx);
fprintf(stdout,
"Client dropped from the set of webserver connections\r\n\r\n");
}
void
InformWebsockets(struct mg_context *ctx)
{
static unsigned long cnt = 0;
char text[32];
int i;
sprintf(text, "%lu", ++cnt);
mg_lock_context(ctx);
for (i = 0; i < MAX_WS_CLIENTS; i++) {
if (ws_clients[i].state == 2) {
mg_websocket_write(ws_clients[i].conn,
MG_WEBSOCKET_OPCODE_TEXT,
text,
strlen(text));
}
}
mg_unlock_context(ctx);
}
#endif
#ifdef USE_SSL_DH
#include "openssl/ssl.h"
#include "openssl/dh.h"
#include "openssl/ec.h"
#include "openssl/evp.h"
#include "openssl/ecdsa.h"
DH *
get_dh2236()
{
static unsigned char dh2236_p[] = {
0x0E, 0x97, 0x6E, 0x6A, 0x88, 0x84, 0xD2, 0xD7, 0x55, 0x6A, 0x17, 0xB7,
0x81, 0x9A, 0x98, 0xBC, 0x7E, 0xD1, 0x6A, 0x44, 0xB1, 0x18, 0xE6, 0x25,
0x3A, 0x62, 0x35, 0xF0, 0x41, 0x91, 0xE2, 0x16, 0x43, 0x9D, 0x8F, 0x7D,
0x5D, 0xDA, 0x85, 0x47, 0x25, 0xC4, 0xBA, 0x68, 0x0A, 0x87, 0xDC, 0x2C,
0x33, 0xF9, 0x75, 0x65, 0x17, 0xCB, 0x8B, 0x80, 0xFE, 0xE0, 0xA8, 0xAF,
0xC7, 0x9E, 0x82, 0xBE, 0x6F, 0x1F, 0x00, 0x04, 0xBD, 0x69, 0x50, 0x8D,
0x9C, 0x3C, 0x41, 0x69, 0x21, 0x4E, 0x86, 0xC8, 0x2B, 0xCC, 0x07, 0x4D,
0xCF, 0xE4, 0xA2, 0x90, 0x8F, 0x66, 0xA9, 0xEF, 0xF7, 0xFC, 0x6F, 0x5F,
0x06, 0x22, 0x00, 0xCB, 0xCB, 0xC3, 0x98, 0x3F, 0x06, 0xB9, 0xEC, 0x48,
0x3B, 0x70, 0x6E, 0x94, 0xE9, 0x16, 0xE1, 0xB7, 0x63, 0x2E, 0xAB, 0xB2,
0xF3, 0x84, 0xB5, 0x3D, 0xD7, 0x74, 0xF1, 0x6A, 0xD1, 0xEF, 0xE8, 0x04,
0x18, 0x76, 0xD2, 0xD6, 0xB0, 0xB7, 0x71, 0xB6, 0x12, 0x8F, 0xD1, 0x33,
0xAB, 0x49, 0xAB, 0x09, 0x97, 0x35, 0x9D, 0x4B, 0xBB, 0x54, 0x22, 0x6E,
0x1A, 0x33, 0x18, 0x02, 0x8A, 0xF4, 0x7C, 0x0A, 0xCE, 0x89, 0x75, 0x2D,
0x10, 0x68, 0x25, 0xA9, 0x6E, 0xCD, 0x97, 0x49, 0xED, 0xAE, 0xE6, 0xA7,
0xB0, 0x07, 0x26, 0x25, 0x60, 0x15, 0x2B, 0x65, 0x88, 0x17, 0xF2, 0x5D,
0x2C, 0xF6, 0x2A, 0x7A, 0x8C, 0xAD, 0xB6, 0x0A, 0xA2, 0x57, 0xB0, 0xC1,
0x0E, 0x5C, 0xA8, 0xA1, 0x96, 0x58, 0x9A, 0x2B, 0xD4, 0xC0, 0x8A, 0xCF,
0x91, 0x25, 0x94, 0xB4, 0x14, 0xA7, 0xE4, 0xE2, 0x1B, 0x64, 0x5F, 0xD2,
0xCA, 0x70, 0x46, 0xD0, 0x2C, 0x95, 0x6B, 0x9A, 0xFB, 0x83, 0xF9, 0x76,
0xE6, 0xD4, 0xA4, 0xA1, 0x2B, 0x2F, 0xF5, 0x1D, 0xE4, 0x06, 0xAF, 0x7D,
0x22, 0xF3, 0x04, 0x30, 0x2E, 0x4C, 0x64, 0x12, 0x5B, 0xB0, 0x55, 0x3E,
0xC0, 0x5E, 0x56, 0xCB, 0x99, 0xBC, 0xA8, 0xD9, 0x23, 0xF5, 0x57, 0x40,
0xF0, 0x52, 0x85, 0x9B,
};
static unsigned char dh2236_g[] = {
0x02,
};
DH *dh;
if ((dh = DH_new()) == NULL)
return (NULL);
dh->p = BN_bin2bn(dh2236_p, sizeof(dh2236_p), NULL);
dh->g = BN_bin2bn(dh2236_g, sizeof(dh2236_g), NULL);
if ((dh->p == NULL) || (dh->g == NULL)) {
DH_free(dh);
return (NULL);
}
return (dh);
}
#endif
#ifndef NO_SSL
int
init_ssl(void *ssl_context, void *user_data)
{
/* Add application specific SSL initialization */
struct ssl_ctx_st *ctx = (struct ssl_ctx_st *)ssl_context;
#ifdef USE_SSL_DH
/* example from https://github.com/civetweb/civetweb/issues/347 */
DH *dh = get_dh2236();
if (!dh)
return -1;
if (1 != SSL_CTX_set_tmp_dh(ctx, dh))
return -1;
DH_free(dh);
EC_KEY *ecdh = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
if (!ecdh)
return -1;
if (1 != SSL_CTX_set_tmp_ecdh(ctx, ecdh))
return -1;
EC_KEY_free(ecdh);
printf("ECDH ciphers initialized\n");
#endif
return 0;
}
#endif
int
log_message(const struct mg_connection *conn, const char *message)
{
puts(message);
return 1;
}
int
main(int argc, char *argv[])
{
const char *options[] = {
"document_root",
DOCUMENT_ROOT,
"listening_ports",
PORT,
"request_timeout_ms",
"10000",
"error_log_file",
"error.log",
#ifdef USE_WEBSOCKET
"websocket_timeout_ms",
"3600000",
#endif
#ifndef NO_SSL
"ssl_certificate",
"../../resources/cert/server.pem",
"ssl_protocol_version",
"3",
"ssl_cipher_list",
#ifdef USE_SSL_DH
"ECDHE-RSA-AES256-GCM-SHA384:DES-CBC3-SHA:AES128-SHA:AES128-GCM-SHA256",
#else
"DES-CBC3-SHA:AES128-SHA:AES128-GCM-SHA256",
#endif
#endif
"enable_auth_domain_check",
"no",
0};
struct mg_callbacks callbacks;
struct mg_context *ctx;
struct mg_server_ports ports[32];
int port_cnt, n;
int err = 0;
/* Check if libcivetweb has been built with all required features. */
#ifdef USE_IPV6
if (!mg_check_feature(8)) {
fprintf(stderr,
"Error: Embedded example built with IPv6 support, "
"but civetweb library build without.\n");
err = 1;
}
#endif
#ifdef USE_WEBSOCKET
if (!mg_check_feature(16)) {
fprintf(stderr,
"Error: Embedded example built with websocket support, "
"but civetweb library build without.\n");
err = 1;
}
#endif
#ifndef NO_SSL
if (!mg_check_feature(2)) {
fprintf(stderr,
"Error: Embedded example built with SSL support, "
"but civetweb library build without.\n");
err = 1;
}
#endif
if (err) {
fprintf(stderr, "Cannot start CivetWeb - inconsistent build.\n");
return EXIT_FAILURE;
}
/* Start CivetWeb web server */
memset(&callbacks, 0, sizeof(callbacks));
#ifndef NO_SSL
callbacks.init_ssl = init_ssl;
#endif
callbacks.log_message = log_message;
ctx = mg_start(&callbacks, 0, options);
/* Check return value: */
if (ctx == NULL) {
fprintf(stderr, "Cannot start CivetWeb - mg_start failed.\n");
return EXIT_FAILURE;
}
/* Add handler EXAMPLE_URI, to explain the example */
mg_set_request_handler(ctx, EXAMPLE_URI, ExampleHandler, 0);
mg_set_request_handler(ctx, EXIT_URI, ExitHandler, 0);
/* Add handler for /A* and special handler for /A/B */
mg_set_request_handler(ctx, "/A", AHandler, 0);
mg_set_request_handler(ctx, "/A/B", ABHandler, 0);
/* Add handler for /B, /B/A, /B/B but not for /B* */
mg_set_request_handler(ctx, "/B$", BXHandler, (void *)0);
mg_set_request_handler(ctx, "/B/A$", BXHandler, (void *)1);
mg_set_request_handler(ctx, "/B/B$", BXHandler, (void *)2);
/* Add handler for all files with .foo extension */
mg_set_request_handler(ctx, "**.foo$", FooHandler, 0);
/* Add handler for /close extension */
mg_set_request_handler(ctx, "/close", CloseHandler, 0);
/* Add handler for /form (serve a file outside the document root) */
mg_set_request_handler(ctx,
"/form",
FileHandler,
(void *)"../../test/form.html");
/* Add handler for form data */
mg_set_request_handler(ctx,
"/handle_form.embedded_c.example.callback",
FormHandler,
(void *)0);
/* Add a file upload handler for parsing files on the fly */
mg_set_request_handler(ctx,
"/on_the_fly_form",
FileUploadForm,
(void *)"/on_the_fly_form.md5.callback");
mg_set_request_handler(ctx,
"/on_the_fly_form.md5.callback",
CheckSumHandler,
(void *)0);
/* Add handler for /cookie example */
mg_set_request_handler(ctx, "/cookie", CookieHandler, 0);
/* Add handler for /postresponse example */
mg_set_request_handler(ctx, "/postresponse", PostResponser, 0);
/* Add HTTP site to open a websocket connection */
mg_set_request_handler(ctx, "/websocket", WebSocketStartHandler, 0);
/* Add HTTP site with auth */
mg_set_request_handler(ctx, "/auth", AuthStartHandler, 0);
#ifdef USE_WEBSOCKET
/* WS site for the websocket connection */
mg_set_websocket_handler(ctx,
"/websocket",
WebSocketConnectHandler,
WebSocketReadyHandler,
WebsocketDataHandler,
WebSocketCloseHandler,
0);
#endif
/* List all listening ports */
memset(ports, 0, sizeof(ports));
port_cnt = mg_get_server_ports(ctx, 32, ports);
printf("\n%i listening ports:\n\n", port_cnt);
for (n = 0; n < port_cnt && n < 32; n++) {
const char *proto = ports[n].is_ssl ? "https" : "http";
const char *host;
if ((ports[n].protocol & 1) == 1) {
/* IPv4 */
host = "127.0.0.1";
printf("Browse files at %s://%s:%i/\n", proto, host, ports[n].port);
printf("Run example at %s://%s:%i%s\n",
proto,
host,
ports[n].port,
EXAMPLE_URI);
printf(
"Exit at %s://%s:%i%s\n", proto, host, ports[n].port, EXIT_URI);
printf("\n");
}
if ((ports[n].protocol & 2) == 2) {
/* IPv6 */
host = "[::1]";
printf("Browse files at %s://%s:%i/\n", proto, host, ports[n].port);
printf("Run example at %s://%s:%i%s\n",
proto,
host,
ports[n].port,
EXAMPLE_URI);
printf(
"Exit at %s://%s:%i%s\n", proto, host, ports[n].port, EXIT_URI);
printf("\n");
}
}
/* Wait until the server should be closed */
while (!exitNow) {
#ifdef _WIN32
Sleep(1000);
#else
sleep(1);
#endif
#ifdef USE_WEBSOCKET
InformWebsockets(ctx);
#endif
}
/* Stop the server */
mg_stop(ctx);
printf("Server stopped.\n");
printf("Bye!\n");
return EXIT_SUCCESS;
}
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