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Location: libtransport.git/spectrum_manager/src/server.cpp
f9a49506a1d0
10.9 KiB
text/x-c++hdr
Starting/stopping instances from web-interface
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 | #include "server.h"
#include "methods.h"
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <time.h>
#include <stdarg.h>
#include <pthread.h>
#define SESSION_TTL 120
static std::string get_header() {
return "\
<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\
\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"> \
<html xmlns=\"http://www.w3.org/1999/xhtml\" lang=\"en\" dir=\"ltr\"> \
<head>\
<title>Spectrum 2 web interface</title>\
<meta http-equiv=\"Content-Type\" content=\"text/html;charset=utf-8\"/>\
<style type=\"text/css\">\
body{ background-color: #F9F9F9; color: #444444; font: normal normal 14px \"Helvetica\", \"Arial\", Sans-Serif; }\
\
pre, kbd, var, samp, tt{ font-family: \"Courier\", Monospace; }\
\
pre { font-size: 12px; }\
\
h1, h2, h3, h4, h5, h6, pre{ color: #094776; }\
\
h1{ font-size: 28px; }\
\
h2{ font-size: 24px; font-weight: normal; }\
\
h1, h2, h3, h4, h5, h6{ margin-bottom: 20px; }\
\
h2, h3{ border-bottom: 2px solid #EEEEEE; padding: 0 0 3px; } \
\
h3{ border-color: #E5E5E5; border-width: 1px; }\
\
h4{ font-size: 18px; }\
\
h1 a, h2 a{ font-weight: normal; }\
\
h1 a, h2 a, h3 a{ text-decoration: none; }\
\
h3, h5, h6{ font-size: 18px; }\
\
h4, h5, h6{ font-size: 14px; }\
\
p, dl, ul, ol{ margin: 20px 0; }\
\
p, dl, ul, ol, h3, h4, h5, h6{ margin-left: 20px; }\
\
li > ul,\
li > ol{ margin: 0; margin-left: 40px; }\
\
dl > dd{ margin-left: 20px; }\
\
li > p { margin: 0; }\
\
p, li, dd, dt, pre{ line-height: 1.5; }\
\
table {\
border-collapse: collapse;\
margin-bottom: 20px;\
margin-left:20px;\
}\
\
th {\
padding: 0 0.5em;\
text-align: center;\
}\
\
th {\
border: 1px solid #FB7A31;\
background: #FFC;\
}\
\
td {\
border-bottom: 1px solid #CCC;\
border-right: 1px solid #CCC;\
border-left: 1px solid #CCC;\
padding: 0 0.5em;\
}\
\
\
a:link,\
a:visited{ color: #1A5B8D; }\
\
a:hover,\
a:active{ color: #742CAC; }\
\
a.headerlink{ visibility: hidden; }\
\
:hover > a.headerlink { visibility: visible; }\
\
a img{ \
border: 0;\
outline: 0;\
}\
\
img{ display: block; max-width: 100%; }\
\
code {\
border: 1px solid #FB7A31;\
background: #FFC;\
}\
\
pre {\
white-space: pre-wrap;\
white-space: -moz-pre-wrap;\
white-space: -o-pre-wrap;\
border: 1px solid #FB7A31;\
background: #FFC;\
padding:5px;\
padding-left: 15px;\
}\
\
</style>\
</head><body><h1>Spectrum 2 web interface</h1>";
}
static void get_qsvar(const struct mg_request_info *request_info,
const char *name, char *dst, size_t dst_len) {
const char *qs = request_info->query_string;
mg_get_var(qs, strlen(qs == NULL ? "" : qs), name, dst, dst_len);
}
static void my_strlcpy(char *dst, const char *src, size_t len) {
strncpy(dst, src, len);
dst[len - 1] = '\0';
}
// Generate session ID. buf must be 33 bytes in size.
// Note that it is easy to steal session cookies by sniffing traffic.
// This is why all communication must be SSL-ed.
static void generate_session_id(char *buf, const char *random,
const char *user) {
mg_md5(buf, random, user, NULL);
}
Server::Server(ManagerConfig *config) {
srand((unsigned) time(0));
m_config = config;
}
Server::~Server() {
mg_stop(ctx);
}
static void *_event_handler(enum mg_event event, struct mg_connection *conn) {
const struct mg_request_info *request_info = mg_get_request_info(conn);
return static_cast<Server *>(request_info->user_data)->event_handler(event, conn);
}
bool Server::start(int port, const std::string &user, const std::string &password) {
m_user = user;
m_password = password;
const char *options[] = {
"listening_ports", boost::lexical_cast<std::string>(port).c_str(),
"num_threads", "1",
NULL
};
// Setup and start Mongoose
if ((ctx = mg_start(&_event_handler, this, options)) == NULL) {
return false;
}
return true;
}
bool Server::check_password(const char *user, const char *password) {
return (m_user == user && m_password == password);
}
// Allocate new session object
Server::session *Server::new_session(const char *user) {
Server::session *session = new Server::session;
my_strlcpy(session->user, user, sizeof(session->user));
snprintf(session->random, sizeof(session->random), "%d", rand());
generate_session_id(session->session_id, session->random, session->user);
session->expire = time(0) + SESSION_TTL;
sessions[session->session_id] = session;
return session;
}
// Get session object for the connection. Caller must hold the lock.
Server::session *Server::get_session(const struct mg_connection *conn) {
time_t now = time(NULL);
char session_id[33];
mg_get_cookie(conn, "session", session_id, sizeof(session_id));
if (sessions.find(session_id) == sessions.end()) {
return NULL;
}
if (sessions[session_id]->expire != 0 && sessions[session_id]->expire > now) {
return sessions[session_id];
}
return NULL;
}
void Server::authorize(struct mg_connection *conn, const struct mg_request_info *request_info) {
char user[255], password[255];
Server::session *session;
// Fetch user name and password.
get_qsvar(request_info, "user", user, sizeof(user));
get_qsvar(request_info, "password", password, sizeof(password));
if (check_password(user, password) && (session = new_session(user)) != NULL) {
std::cout << "User authorized\n";
// Authentication success:
// 1. create new session
// 2. set session ID token in the cookie
// 3. remove original_url from the cookie - not needed anymore
// 4. redirect client back to the original URL
//
// The most secure way is to stay HTTPS all the time. However, just to
// show the technique, we redirect to HTTP after the successful
// authentication. The danger of doing this is that session cookie can
// be stolen and an attacker may impersonate the user.
// Secure application must use HTTPS all the time.
mg_printf(conn, "HTTP/1.1 302 Found\r\n"
"Set-Cookie: session=%s; max-age=3600; http-only\r\n" // Session ID
"Set-Cookie: user=%s\r\n" // Set user, needed by Javascript code
"Set-Cookie: original_url=/; max-age=0\r\n" // Delete original_url
"Location: /\r\n\r\n",
session->session_id, session->user);
} else {
// Authentication failure, redirect to login.
redirect_to(conn, request_info, "/login");
}
}
bool Server::is_authorized(const struct mg_connection *conn, const struct mg_request_info *request_info) {
Server::session *session;
char valid_id[33];
bool authorized = false;
// Always authorize accesses to login page and to authorize URI
if (!strcmp(request_info->uri, "/login") ||
!strcmp(request_info->uri, "/authorize")) {
return true;
}
// pthread_rwlock_rdlock(&rwlock);
if ((session = get_session(conn)) != NULL) {
generate_session_id(valid_id, session->random, session->user);
if (strcmp(valid_id, session->session_id) == 0) {
session->expire = time(0) + SESSION_TTL;
authorized = true;
}
}
// pthread_rwlock_unlock(&rwlock);
return authorized;
}
void Server::redirect_to(struct mg_connection *conn, const struct mg_request_info *request_info, const char *where) {
mg_printf(conn, "HTTP/1.1 302 Found\r\n"
"Set-Cookie: original_url=%s\r\n"
"Location: %s\r\n\r\n",
request_info->uri, where);
}
void Server::print_html(struct mg_connection *conn, const struct mg_request_info *request_info, const std::string &html) {
mg_printf(conn,
"HTTP/1.1 200 OK\r\n"
"Content-Type: text/html\r\n"
"Content-Length: %d\r\n" // Always set Content-Length
"\r\n"
"%s",
(int) html.size(), html.c_str());
}
void Server::serve_login(struct mg_connection *conn, const struct mg_request_info *request_info) {
std::string html= "\
<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\
\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"> \
<html xmlns=\"http://www.w3.org/1999/xhtml\" lang=\"en\" dir=\"ltr\"> \
<head>\
<title>Spectrum 2 web interface</title>\
<meta http-equiv=\"Content-Type\" content=\"text/html;charset=utf-8\"/>\
</head>\
<body>\
<center>\
<h2>Spectrum 2 web interface login</h2>\
<br/>\
<form action=\"/authorize\">\
Username: <input type=\"text\" name=\"user\"></input><br/>\
Password: <input type=\"text\" name=\"password\"></input><br/>\
<input type=\"submit\" value=\"Login\"></input>\
</form>\
</center>\
</body>\
</html>";
print_html(conn, request_info, html);
}
void Server::serve_start(struct mg_connection *conn, const struct mg_request_info *request_info) {
std::string html= get_header() ;
char jid[255];
get_qsvar(request_info, "jid", jid, sizeof(jid));
start_instances(m_config, jid);
html += "<b>" + get_response() + "</b>";
html += "</body></html>";
print_html(conn, request_info, html);
}
void Server::serve_stop(struct mg_connection *conn, const struct mg_request_info *request_info) {
std::string html= get_header();
char jid[255];
get_qsvar(request_info, "jid", jid, sizeof(jid));
stop_instances(m_config, jid);
html += "<b>" + get_response() + "</b>";
html += "</body></html>";
print_html(conn, request_info, html);
}
void Server::serve_root(struct mg_connection *conn, const struct mg_request_info *request_info) {
std::vector<std::string> list = show_list(m_config, false);
std::string html= get_header() + "<h2>List of instances</h2><table><tr><th>JID<th>Status</th><th>Command</th></tr>";
BOOST_FOREACH(std::string &instance, list) {
html += "<tr>";
html += "<td>" + instance + "</td>";
Swift::SimpleEventLoop eventLoop;
Swift::BoostNetworkFactories networkFactories(&eventLoop);
ask_local_server(m_config, networkFactories, instance, "status");
eventLoop.runUntilEvents();
while(get_response().empty()) {
eventLoop.runUntilEvents();
}
html += "<td>" + get_response() + "</td>";
if (get_response().find("Running") == 0) {
html += "<td><a href=\"/stop?jid=" + instance + "\">Stop</a></td>";
}
else {
html += "<td><a href=\"/start?jid=" + instance + "\">Start</a></td>";
}
html += "</tr>";
}
html += "</table></body></html>";
print_html(conn, request_info, html);
}
void *Server::event_handler(enum mg_event event, struct mg_connection *conn) {
const struct mg_request_info *request_info = mg_get_request_info(conn);
void *processed = (void *) 0x1;
if (event == MG_NEW_REQUEST) {
if (!is_authorized(conn, request_info)) {
redirect_to(conn, request_info, "/login");
} else if (strcmp(request_info->uri, "/authorize") == 0) {
authorize(conn, request_info);
} else if (strcmp(request_info->uri, "/login") == 0) {
serve_login(conn, request_info);
} else if (strcmp(request_info->uri, "/") == 0) {
serve_root(conn, request_info);
} else if (strcmp(request_info->uri, "/start") == 0) {
serve_start(conn, request_info);
} else if (strcmp(request_info->uri, "/stop") == 0) {
serve_stop(conn, request_info);
} else {
// No suitable handler found, mark as not processed. Mongoose will
// try to serve the request.
processed = NULL;
}
} else {
processed = NULL;
}
return processed;
}
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