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mirror of https://github.com/VCMP-SqMod/SqMod.git synced 2024-11-08 08:47:17 +01:00
SqMod/vendor/CivetWeb/CivetServer.cpp
2021-09-04 22:44:47 +03:00

758 lines
19 KiB
C++

/* Copyright (c) 2013-2020 the Civetweb developers
* Copyright (c) 2013 No Face Press, LLC
*
* License http://opensource.org/licenses/mit-license.php MIT License
*/
#include "CivetServer.h"
#include <assert.h>
#include <stdexcept>
#include <string.h>
#ifndef UNUSED_PARAMETER
#define UNUSED_PARAMETER(x) (void)(x)
#endif
#ifndef MAX_PARAM_BODY_LENGTH
// Set a default limit for parameters in a form body: 2 MB
#define MAX_PARAM_BODY_LENGTH (1024 * 1024 * 2)
#endif
bool
CivetHandler::handleGet(CivetServer *server, struct mg_connection *conn)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
return false;
}
bool
CivetHandler::handleGet(CivetServer *server,
struct mg_connection *conn,
int *status_code)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
if (status_code) {
*status_code = -1;
}
return false;
}
bool
CivetHandler::handlePost(CivetServer *server, struct mg_connection *conn)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
return false;
}
bool
CivetHandler::handlePost(CivetServer *server,
struct mg_connection *conn,
int *status_code)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
if (status_code) {
*status_code = -1;
}
return false;
}
bool
CivetHandler::handleHead(CivetServer *server, struct mg_connection *conn)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
return false;
}
bool
CivetHandler::handleHead(CivetServer *server,
struct mg_connection *conn,
int *status_code)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
if (status_code) {
*status_code = -1;
}
return false;
}
bool
CivetHandler::handlePut(CivetServer *server, struct mg_connection *conn)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
return false;
}
bool
CivetHandler::handlePut(CivetServer *server,
struct mg_connection *conn,
int *status_code)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
if (status_code) {
*status_code = -1;
}
return false;
}
bool
CivetHandler::handlePatch(CivetServer *server, struct mg_connection *conn)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
return false;
}
bool
CivetHandler::handlePatch(CivetServer *server,
struct mg_connection *conn,
int *status_code)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
if (status_code) {
*status_code = -1;
}
return false;
}
bool
CivetHandler::handleDelete(CivetServer *server, struct mg_connection *conn)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
return false;
}
bool
CivetHandler::handleDelete(CivetServer *server,
struct mg_connection *conn,
int *status_code)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
if (status_code) {
*status_code = -1;
}
return false;
}
bool
CivetHandler::handleOptions(CivetServer *server, struct mg_connection *conn)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
return false;
}
bool
CivetHandler::handleOptions(CivetServer *server,
struct mg_connection *conn,
int *status_code)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
if (status_code) {
*status_code = -1;
}
return false;
}
bool
CivetWebSocketHandler::handleConnection(CivetServer *server,
const struct mg_connection *conn)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
return true;
}
void
CivetWebSocketHandler::handleReadyState(CivetServer *server,
struct mg_connection *conn)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
return;
}
bool
CivetWebSocketHandler::handleData(CivetServer *server,
struct mg_connection *conn,
int bits,
char *data,
size_t data_len)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
UNUSED_PARAMETER(bits);
UNUSED_PARAMETER(data);
UNUSED_PARAMETER(data_len);
return true;
}
void
CivetWebSocketHandler::handleClose(CivetServer *server,
const struct mg_connection *conn)
{
UNUSED_PARAMETER(server);
UNUSED_PARAMETER(conn);
return;
}
int
CivetServer::requestHandler(struct mg_connection *conn, void *cbdata)
{
const struct mg_request_info *request_info = mg_get_request_info(conn);
assert(request_info != NULL);
CivetServer *me = (CivetServer *)(request_info->user_data);
assert(me != NULL);
int http_status_code = -1;
bool status_ok = false;
// Happens when a request hits the server before the context is saved
if (me->context == NULL)
return 0;
mg_lock_context(me->context);
me->connections[conn] = CivetConnection();
mg_unlock_context(me->context);
CivetHandler *handler = (CivetHandler *)cbdata;
if (handler) {
if (strcmp(request_info->request_method, "GET") == 0) {
status_ok = handler->handleGet(me, conn, &http_status_code);
if (http_status_code < 0) {
status_ok = handler->handleGet(me, conn);
}
} else if (strcmp(request_info->request_method, "POST") == 0) {
status_ok = handler->handlePost(me, conn, &http_status_code);
if (http_status_code < 0) {
status_ok = handler->handlePost(me, conn);
}
} else if (strcmp(request_info->request_method, "HEAD") == 0) {
status_ok = handler->handleHead(me, conn, &http_status_code);
if (http_status_code < 0) {
status_ok = handler->handleHead(me, conn);
}
} else if (strcmp(request_info->request_method, "PUT") == 0) {
status_ok = handler->handlePut(me, conn, &http_status_code);
if (http_status_code < 0) {
status_ok = handler->handlePut(me, conn);
}
} else if (strcmp(request_info->request_method, "DELETE") == 0) {
status_ok = handler->handleDelete(me, conn, &http_status_code);
if (http_status_code < 0) {
status_ok = handler->handleDelete(me, conn);
}
} else if (strcmp(request_info->request_method, "OPTIONS") == 0) {
status_ok = handler->handleOptions(me, conn, &http_status_code);
if (http_status_code < 0) {
status_ok = handler->handleOptions(me, conn);
}
} else if (strcmp(request_info->request_method, "PATCH") == 0) {
status_ok = handler->handlePatch(me, conn, &http_status_code);
if (http_status_code < 0) {
status_ok = handler->handlePatch(me, conn);
}
}
}
if (http_status_code < 0) {
http_status_code = status_ok ? 1 : 0;
}
return http_status_code;
}
int
CivetServer::authHandler(struct mg_connection *conn, void *cbdata)
{
const struct mg_request_info *request_info = mg_get_request_info(conn);
assert(request_info != NULL);
CivetServer *me = (CivetServer *)(request_info->user_data);
assert(me != NULL);
// Happens when a request hits the server before the context is saved
if (me->context == NULL)
return 0;
mg_lock_context(me->context);
me->connections[conn] = CivetConnection();
mg_unlock_context(me->context);
CivetAuthHandler *handler = (CivetAuthHandler *)cbdata;
if (handler) {
return handler->authorize(me, conn) ? 1 : 0;
}
return 0; // No handler found
}
int
CivetServer::webSocketConnectionHandler(const struct mg_connection *conn,
void *cbdata)
{
const struct mg_request_info *request_info = mg_get_request_info(conn);
assert(request_info != NULL);
CivetServer *me = (CivetServer *)(request_info->user_data);
assert(me != NULL);
// Happens when a request hits the server before the context is saved
if (me->context == NULL)
return 0;
CivetWebSocketHandler *handler = (CivetWebSocketHandler *)cbdata;
if (handler) {
return handler->handleConnection(me, conn) ? 0 : 1;
}
return 1; // No handler found, close connection
}
void
CivetServer::webSocketReadyHandler(struct mg_connection *conn, void *cbdata)
{
const struct mg_request_info *request_info = mg_get_request_info(conn);
assert(request_info != NULL);
CivetServer *me = (CivetServer *)(request_info->user_data);
assert(me != NULL);
// Happens when a request hits the server before the context is saved
if (me->context == NULL)
return;
CivetWebSocketHandler *handler = (CivetWebSocketHandler *)cbdata;
if (handler) {
handler->handleReadyState(me, conn);
}
}
int
CivetServer::webSocketDataHandler(struct mg_connection *conn,
int bits,
char *data,
size_t data_len,
void *cbdata)
{
const struct mg_request_info *request_info = mg_get_request_info(conn);
assert(request_info != NULL);
CivetServer *me = (CivetServer *)(request_info->user_data);
assert(me != NULL);
// Happens when a request hits the server before the context is saved
if (me->context == NULL)
return 0;
CivetWebSocketHandler *handler = (CivetWebSocketHandler *)cbdata;
if (handler) {
return handler->handleData(me, conn, bits, data, data_len) ? 1 : 0;
}
return 1; // No handler found
}
void
CivetServer::webSocketCloseHandler(const struct mg_connection *conn,
void *cbdata)
{
const struct mg_request_info *request_info = mg_get_request_info(conn);
assert(request_info != NULL);
CivetServer *me = (CivetServer *)(request_info->user_data);
assert(me != NULL);
// Happens when a request hits the server before the context is saved
if (me->context == NULL)
return;
CivetWebSocketHandler *handler = (CivetWebSocketHandler *)cbdata;
if (handler) {
handler->handleClose(me, conn);
}
}
CivetCallbacks::CivetCallbacks()
{
memset(this, 0, sizeof(*this));
}
CivetServer::CivetServer(const char **options,
const struct CivetCallbacks *_callbacks,
const void *UserContextIn)
: context(0)
{
struct CivetCallbacks callbacks;
memset(&callbacks, 0, sizeof(callbacks));
UserContext = UserContextIn;
if (_callbacks) {
callbacks = *_callbacks;
userCloseHandler = _callbacks->connection_close;
} else {
userCloseHandler = NULL;
}
callbacks.connection_close = closeHandler;
context = mg_start(&callbacks, this, options);
if (context == NULL) {
throw CivetException("null context when constructing CivetServer. "
"Possible problem binding to port.");
}
}
CivetServer::CivetServer(const std::vector<std::string> &options,
const struct CivetCallbacks *_callbacks,
const void *UserContextIn)
: context(0)
{
struct CivetCallbacks callbacks;
memset(&callbacks, 0, sizeof(callbacks));
UserContext = UserContextIn;
if (_callbacks) {
callbacks = *_callbacks;
userCloseHandler = _callbacks->connection_close;
} else {
userCloseHandler = NULL;
}
callbacks.connection_close = closeHandler;
std::vector<const char *> pointers(options.size() + 1);
for (size_t i = 0; i < options.size(); i++) {
pointers[i] = (options[i].c_str());
}
pointers.back() = NULL;
context = mg_start(&callbacks, this, &pointers[0]);
if (context == NULL)
throw CivetException("null context when constructing CivetServer. "
"Possible problem binding to port.");
}
CivetServer::~CivetServer()
{
close();
}
void
CivetServer::closeHandler(const struct mg_connection *conn)
{
CivetServer *me = (CivetServer *)mg_get_user_data(mg_get_context(conn));
assert(me != NULL);
// Happens when a request hits the server before the context is saved
if (me->context == NULL)
return;
if (me->userCloseHandler) {
me->userCloseHandler(conn);
}
mg_lock_context(me->context);
me->connections.erase(conn);
mg_unlock_context(me->context);
}
void
CivetServer::addHandler(const std::string &uri, CivetHandler *handler)
{
mg_set_request_handler(context, uri.c_str(), requestHandler, handler);
}
void
CivetServer::addWebSocketHandler(const std::string &uri,
CivetWebSocketHandler *handler)
{
mg_set_websocket_handler(context,
uri.c_str(),
webSocketConnectionHandler,
webSocketReadyHandler,
webSocketDataHandler,
webSocketCloseHandler,
handler);
}
void
CivetServer::addAuthHandler(const std::string &uri, CivetAuthHandler *handler)
{
mg_set_auth_handler(context, uri.c_str(), authHandler, handler);
}
void
CivetServer::removeHandler(const std::string &uri)
{
mg_set_request_handler(context, uri.c_str(), NULL, NULL);
}
void
CivetServer::removeWebSocketHandler(const std::string &uri)
{
mg_set_websocket_handler(
context, uri.c_str(), NULL, NULL, NULL, NULL, NULL);
}
void
CivetServer::removeAuthHandler(const std::string &uri)
{
mg_set_auth_handler(context, uri.c_str(), NULL, NULL);
}
void
CivetServer::close()
{
if (context) {
mg_stop(context);
context = 0;
}
}
int
CivetServer::getCookie(struct mg_connection *conn,
const std::string &cookieName,
std::string &cookieValue)
{
// Maximum cookie length as per microsoft is 4096.
// http://msdn.microsoft.com/en-us/library/ms178194.aspx
char _cookieValue[4096];
const char *cookie = mg_get_header(conn, "Cookie");
int lRead = mg_get_cookie(cookie,
cookieName.c_str(),
_cookieValue,
sizeof(_cookieValue));
cookieValue.clear();
cookieValue.append(_cookieValue);
return lRead;
}
const char *
CivetServer::getHeader(struct mg_connection *conn,
const std::string &headerName)
{
return mg_get_header(conn, headerName.c_str());
}
const char *
CivetServer::getMethod(struct mg_connection *conn)
{
const struct mg_request_info *request_info = mg_get_request_info(conn);
assert(request_info != NULL);
return request_info->request_method;
}
void
CivetServer::urlDecode(const char *src,
std::string &dst,
bool is_form_url_encoded)
{
urlDecode(src, strlen(src), dst, is_form_url_encoded);
}
void
CivetServer::urlDecode(const char *src,
size_t src_len,
std::string &dst,
bool is_form_url_encoded)
{
// assign enough buffer
std::vector<char> buf(src_len + 1);
int r = mg_url_decode(src,
static_cast<int>(src_len),
&buf[0],
static_cast<int>(buf.size()),
is_form_url_encoded);
if (r < 0) {
// never reach here
throw std::out_of_range("");
}
// dst can contain NUL characters
dst.assign(buf.begin(), buf.begin() + r);
}
bool
CivetServer::getParam(struct mg_connection *conn,
const char *name,
std::string &dst,
size_t occurrence)
{
const char *formParams = NULL;
const char *queryString = NULL;
const struct mg_request_info *ri = mg_get_request_info(conn);
assert(ri != NULL);
CivetServer *me = (CivetServer *)(ri->user_data);
assert(me != NULL);
mg_lock_context(me->context);
CivetConnection &conobj = me->connections[conn];
mg_unlock_context(me->context);
mg_lock_connection(conn);
if (conobj.postData.empty()) {
// check if there is a request body
for (;;) {
char buf[2048];
int r = mg_read(conn, buf, sizeof(buf));
try {
if (r == 0) {
conobj.postData.push_back('\0');
break;
} else if ((r < 0)
|| ((conobj.postData.size() + r)
> MAX_PARAM_BODY_LENGTH)) {
conobj.postData.assign(1, '\0');
break;
}
conobj.postData.insert(conobj.postData.end(), buf, buf + r);
} catch (...) {
conobj.postData.clear();
break;
}
}
}
if (!conobj.postData.empty()) {
// check if form parameter are already stored
formParams = &conobj.postData[0];
}
if (ri->query_string != NULL) {
// get requests do store html <form> field values in the http
// query_string
queryString = ri->query_string;
}
mg_unlock_connection(conn);
bool get_param_success = false;
if (formParams != NULL) {
get_param_success =
getParam(formParams, strlen(formParams), name, dst, occurrence);
}
if (!get_param_success && queryString != NULL) {
get_param_success =
getParam(queryString, strlen(queryString), name, dst, occurrence);
}
return get_param_success;
}
bool
CivetServer::getParam(const char *data,
size_t data_len,
const char *name,
std::string &dst,
size_t occurrence)
{
char buf[256];
int r = mg_get_var2(data, data_len, name, buf, sizeof(buf), occurrence);
if (r >= 0) {
// dst can contain NUL characters
dst.assign(buf, r);
return true;
} else if (r == -2) {
// more buffer
std::vector<char> vbuf(sizeof(buf) * 2);
for (;;) {
r = mg_get_var2(
data, data_len, name, &vbuf[0], vbuf.size(), occurrence);
if (r >= 0) {
dst.assign(vbuf.begin(), vbuf.begin() + r);
return true;
} else if (r != -2) {
break;
}
// more buffer
vbuf.resize(vbuf.size() * 2);
}
}
dst.clear();
return false;
}
std::string
CivetServer::getPostData(struct mg_connection *conn)
{
mg_lock_connection(conn);
std::string postdata;
char buf[2048];
int r = mg_read(conn, buf, sizeof(buf));
while (r > 0) {
postdata.append(buf, r);
r = mg_read(conn, buf, sizeof(buf));
}
mg_unlock_connection(conn);
return postdata;
}
void
CivetServer::urlEncode(const char *src, std::string &dst, bool append)
{
urlEncode(src, strlen(src), dst, append);
}
void
CivetServer::urlEncode(const char *src,
size_t src_len,
std::string &dst,
bool append)
{
if (!append)
dst.clear();
for (; src_len > 0; src++, src_len--) {
if (*src == '\0') {
// src and dst can contain NUL characters without encoding
dst.push_back(*src);
} else {
char buf[2] = {*src, '\0'};
char dst_buf[4];
if (mg_url_encode(buf, dst_buf, sizeof(dst_buf)) < 0) {
// never reach here
throw std::out_of_range("");
}
dst.append(dst_buf);
}
}
}
std::vector<int>
CivetServer::getListeningPorts()
{
std::vector<struct mg_server_port> server_ports = getListeningPortsFull();
std::vector<int> ports(server_ports.size());
for (size_t i = 0; i < server_ports.size(); i++) {
ports[i] = server_ports[i].port;
}
return ports;
}
std::vector<struct mg_server_port>
CivetServer::getListeningPortsFull()
{
std::vector<struct mg_server_port> server_ports(8);
for (;;) {
int size = mg_get_server_ports(context,
static_cast<int>(server_ports.size()),
&server_ports[0]);
if (size < static_cast<int>(server_ports.size())) {
server_ports.resize(size < 0 ? 0 : size);
break;
}
server_ports.resize(server_ports.size() * 2);
}
return server_ports;
}