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/* Copyright (c) 2013-2018 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 Embedded C++ interface.
#include "CivetServer.h"
#include <cstring>
#ifdef _WIN32
#include <windows.h>
#else
#include <unistd.h>
#endif
#define DOCUMENT_ROOT "."
#define PORT "8081"
#define EXAMPLE_URI "/example"
#define EXIT_URI "/exit"
/* Exit flag for main loop */
volatile bool exitNow = false;
class ExampleHandler : public CivetHandler
{
public:
bool
handleGet(CivetServer *server, struct mg_connection *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>\r\n");
mg_printf(conn,
"<h2>This is an example text from a C++ handler</h2>\r\n");
mg_printf(conn,
"<p>To see a page from the A handler <a "
"href=\"a\">click here</a></p>\r\n");
mg_printf(conn,
"<form action=\"a\" method=\"get\">"
"To see a page from the A handler with a parameter "
"<input type=\"submit\" value=\"click here\" "
"name=\"param\" \\> (GET)</form>\r\n");
mg_printf(conn,
"<form action=\"a\" method=\"post\">"
"To see a page from the A handler with a parameter "
"<input type=\"submit\" value=\"click here\" "
"name=\"param\" \\> (POST)</form>\r\n");
mg_printf(conn,
"<p>To see a page from the A/B handler <a "
"href=\"a/b\">click here</a></p>\r\n");
mg_printf(conn,
"<p>To see a page from the *.foo handler <a "
"href=\"xy.foo\">click here</a></p>\r\n");
mg_printf(conn,
"<p>To see a page from the WebSocket handler <a "
"href=\"ws\">click here</a></p>\r\n");
mg_printf(conn,
"<p>To exit <a href=\"%s\">click here</a></p>\r\n",
EXIT_URI);
mg_printf(conn, "</body></html>\r\n");
return true;
}
};
class ExitHandler : public CivetHandler
{
public:
bool
handleGet(CivetServer *server, struct mg_connection *conn)
{
mg_printf(conn,
"HTTP/1.1 200 OK\r\nContent-Type: "
"text/plain\r\nConnection: close\r\n\r\n");
mg_printf(conn, "Bye!\n");
exitNow = true;
return true;
}
};
class AHandler : public CivetHandler
{
private:
bool
handleAll(const char *method,
CivetServer *server,
struct mg_connection *conn)
{
std::string s = "";
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 for \"%s\" !</h2>", method);
if (CivetServer::getParam(conn, "param", s)) {
mg_printf(conn, "<p>param set to %s</p>", s.c_str());
} else {
mg_printf(conn, "<p>param not set</p>");
}
mg_printf(conn, "</body></html>\n");
return true;
}
public:
bool
handleGet(CivetServer *server, struct mg_connection *conn)
{
return handleAll("GET", server, conn);
}
bool
handlePost(CivetServer *server, struct mg_connection *conn)
{
return handleAll("POST", server, conn);
}
};
class ABHandler : public CivetHandler
{
public:
bool
handleGet(CivetServer *server, struct mg_connection *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 AB handler!!!</h2>");
mg_printf(conn, "</body></html>\n");
return true;
}
};
class FooHandler : public CivetHandler
{
public:
bool
handleGet(CivetServer *server, struct mg_connection *conn)
{
/* 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>\n");
mg_printf(conn, "<h2>This is the Foo GET handler!!!</h2>\n");
mg_printf(conn,
"<p>The request was:<br><pre>%s %s HTTP/%s</pre></p>\n",
req_info->request_method,
req_info->request_uri,
req_info->http_version);
mg_printf(conn, "</body></html>\n");
return true;
}
bool
handlePost(CivetServer *server, struct mg_connection *conn)
{
/* Handler may access the request info using mg_get_request_info */
const struct mg_request_info *req_info = mg_get_request_info(conn);
long long rlen, wlen;
long long nlen = 0;
long long tlen = req_info->content_length;
char buf[1024];
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>\n");
mg_printf(conn, "<h2>This is the Foo POST handler!!!</h2>\n");
mg_printf(conn,
"<p>The request was:<br><pre>%s %s HTTP/%s</pre></p>\n",
req_info->request_method,
req_info->request_uri,
req_info->http_version);
mg_printf(conn, "<p>Content Length: %li</p>\n", (long)tlen);
mg_printf(conn, "<pre>\n");
while (nlen < tlen) {
rlen = tlen - nlen;
if (rlen > sizeof(buf)) {
rlen = sizeof(buf);
}
rlen = mg_read(conn, buf, (size_t)rlen);
if (rlen <= 0) {
break;
}
wlen = mg_write(conn, buf, (size_t)rlen);
if (wlen != rlen) {
break;
}
nlen += wlen;
}
mg_printf(conn, "\n</pre>\n");
mg_printf(conn, "</body></html>\n");
return true;
}
#define fopen_recursive fopen
bool
handlePut(CivetServer *server, struct mg_connection *conn)
{
/* Handler may access the request info using mg_get_request_info */
const struct mg_request_info *req_info = mg_get_request_info(conn);
long long rlen, wlen;
long long nlen = 0;
long long tlen = req_info->content_length;
FILE * f;
char buf[1024];
int fail = 0;
#ifdef _WIN32
_snprintf(buf, sizeof(buf), "D:\\somewhere\\%s\\%s", req_info->remote_user, req_info->local_uri);
buf[sizeof(buf)-1] = 0;
if (strlen(buf)>255) {
/* Windows will not work with path > 260 (MAX_PATH), unless we use
* the unicode API. However, this is just an example code: A real
* code will probably never store anything to D:\\somewhere and
* must be adapted to the specific needs anyhow. */
fail = 1;
f = NULL;
} else {
f = fopen_recursive(buf, "wb");
}
#else
snprintf(buf, sizeof(buf), "~/somewhere/%s/%s", req_info->remote_user, req_info->local_uri);
buf[sizeof(buf)-1] = 0;
if (strlen(buf)>1020) {
/* The string is too long and probably truncated. Make sure an
* UTF-8 string is never truncated between the UTF-8 code bytes.
* This example code must be adapted to the specific needs. */
fail = 1;
f = NULL;
} else {
f = fopen_recursive(buf, "w");
}
#endif
if (!f) {
fail = 1;
} else {
while (nlen < tlen) {
rlen = tlen - nlen;
if (rlen > sizeof(buf)) {
rlen = sizeof(buf);
}
rlen = mg_read(conn, buf, (size_t)rlen);
if (rlen <= 0) {
fail = 1;
break;
}
wlen = fwrite(buf, 1, (size_t)rlen, f);
if (wlen != rlen) {
fail = 1;
break;
}
nlen += wlen;
}
fclose(f);
}
if (fail) {
mg_printf(conn,
"HTTP/1.1 409 Conflict\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n");
} else {
mg_printf(conn,
"HTTP/1.1 201 Created\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n");
}
return true;
}
};
class WsStartHandler : public CivetHandler
{
public:
bool
handleGet(CivetServer *server, struct mg_connection *conn)
{
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,
"var i=0\n"
"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"
" i=i+1;"
" connection.send(i);\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
class WebSocketHandler : public CivetWebSocketHandler {
virtual bool handleConnection(CivetServer *server,
const struct mg_connection *conn) {
printf("WS connected\n");
return true;
}
virtual void handleReadyState(CivetServer *server,
struct mg_connection *conn) {
printf("WS ready\n");
const char *text = "Hello from the websocket ready handler";
mg_websocket_write(conn, MG_WEBSOCKET_OPCODE_TEXT, text, strlen(text));
}
virtual bool handleData(CivetServer *server,
struct mg_connection *conn,
int bits,
char *data,
size_t data_len) {
printf("WS got %lu bytes: ", (long unsigned)data_len);
fwrite(data, 1, data_len, stdout);
printf("\n");
mg_websocket_write(conn, MG_WEBSOCKET_OPCODE_TEXT, data, data_len);
return (data_len<4);
}
virtual void handleClose(CivetServer *server,
const struct mg_connection *conn) {
printf("WS closed\n");
}
};
#endif
int
main(int argc, char *argv[])
{
mg_init_library(0);
const char *options[] = {
"document_root", DOCUMENT_ROOT, "listening_ports", PORT, 0};
std::vector<std::string> cpp_options;
for (int i=0; i<(sizeof(options)/sizeof(options[0])-1); i++) {
cpp_options.push_back(options[i]);
}
// CivetServer server(options); // <-- C style start
CivetServer server(cpp_options); // <-- C++ style start
ExampleHandler h_ex;
server.addHandler(EXAMPLE_URI, h_ex);
ExitHandler h_exit;
server.addHandler(EXIT_URI, h_exit);
AHandler h_a;
server.addHandler("/a", h_a);
ABHandler h_ab;
server.addHandler("/a/b", h_ab);
WsStartHandler h_ws;
server.addHandler("/ws", h_ws);
#ifdef NO_FILES
/* This handler will handle "everything else", including
* requests to files. If this handler is installed,
* NO_FILES should be set. */
FooHandler h_foo;
server.addHandler("", h_foo);
printf("See a page from the \"all\" handler at http://localhost:%s/\n", PORT);
#else
FooHandler h_foo;
server.addHandler("**.foo", h_foo);
printf("Browse files at http://localhost:%s/\n", PORT);
#endif
#ifdef USE_WEBSOCKET
WebSocketHandler h_websocket;
server.addWebSocketHandler("/websocket", h_websocket);
printf("Run websocket example at http://localhost:%s/ws\n", PORT);
#endif
printf("Run example at http://localhost:%s%s\n", PORT, EXAMPLE_URI);
printf("Exit at http://localhost:%s%s\n", PORT, EXIT_URI);
while (!exitNow) {
#ifdef _WIN32
Sleep(1000);
#else
sleep(1);
#endif
}
printf("Bye!\n");
mg_exit_library();
return 0;
}
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