mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-12-03 00:33:04 +08:00
285 lines
9.4 KiB
C++
285 lines
9.4 KiB
C++
/*
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* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
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*
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* Use of this source code is governed by MIT license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#include "Util/util.h"
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#include "Util/MD5.h"
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#include "Common/config.h"
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#include "HttpCookieManager.h"
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namespace mediakit {
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//////////////////////////////HttpServerCookie////////////////////////////////////
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HttpServerCookie::HttpServerCookie(const std::shared_ptr<HttpCookieManager> &manager,
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const string &cookie_name,
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const string &uid,
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const string &cookie,
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uint64_t max_elapsed){
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_uid = uid;
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_max_elapsed = max_elapsed;
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_cookie_uuid = cookie;
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_cookie_name = cookie_name;
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_manager = manager;
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manager->onAddCookie(_cookie_name,_uid,_cookie_uuid);
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}
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HttpServerCookie::~HttpServerCookie() {
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auto strongManager = _manager.lock();
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if(strongManager){
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strongManager->onDelCookie(_cookie_name,_uid,_cookie_uuid);
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}
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}
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const string & HttpServerCookie::getUid() const{
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return _uid;
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}
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string HttpServerCookie::getCookie(const string &path) const {
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return (StrPrinter << _cookie_name << "=" << _cookie_uuid << ";expires=" << cookieExpireTime() << ";path=" << path);
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}
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const string& HttpServerCookie::getCookie() const {
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return _cookie_uuid;
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}
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const string& HttpServerCookie::getCookieName() const{
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return _cookie_name;
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}
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void HttpServerCookie::updateTime() {
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_ticker.resetTime();
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}
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bool HttpServerCookie::isExpired() {
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return _ticker.elapsedTime() > _max_elapsed * 1000;
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}
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std::shared_ptr<lock_guard<recursive_mutex> > HttpServerCookie::getLock(){
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return std::make_shared<lock_guard<recursive_mutex> >(_mtx);
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}
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string HttpServerCookie::cookieExpireTime() const{
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char buf[64];
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time_t tt = time(NULL) + _max_elapsed;
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strftime(buf, sizeof buf, "%a, %b %d %Y %H:%M:%S GMT", gmtime(&tt));
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return buf;
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}
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//////////////////////////////CookieManager////////////////////////////////////
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INSTANCE_IMP(HttpCookieManager);
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HttpCookieManager::HttpCookieManager() {
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//定时删除过期的cookie，防止内存膨胀
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_timer = std::make_shared<Timer>(10.0f,[this](){
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onManager();
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return true;
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}, nullptr);
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}
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HttpCookieManager::~HttpCookieManager() {
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_timer.reset();
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}
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void HttpCookieManager::onManager() {
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lock_guard<recursive_mutex> lck(_mtx_cookie);
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//先遍历所有类型
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for(auto it_name = _map_cookie.begin() ; it_name != _map_cookie.end() ;){
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//再遍历该类型下的所有cookie
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for (auto it_cookie = it_name->second.begin() ; it_cookie != it_name->second.end() ; ){
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if(it_cookie->second->isExpired()){
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//cookie过期,移除记录
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DebugL << it_cookie->second->getUid() << " cookie过期:" << it_cookie->second->getCookie();
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it_cookie = it_name->second.erase(it_cookie);
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continue;
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}
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++it_cookie;
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}
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if(it_name->second.empty()){
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//该类型下没有任何cooki记录,移除之
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DebugL << "该path下没有任何cooki记录:" << it_name->first;
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it_name = _map_cookie.erase(it_name);
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continue;
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}
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++it_name;
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}
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}
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HttpServerCookie::Ptr HttpCookieManager::addCookie(const string &cookie_name,const string &uidIn,uint64_t max_elapsed,int max_client) {
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lock_guard<recursive_mutex> lck(_mtx_cookie);
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auto cookie = _geneator.obtain();
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auto uid = uidIn.empty() ? cookie : uidIn;
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auto oldCookie = getOldestCookie(cookie_name , uid, max_client);
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if(!oldCookie.empty()){
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//假如该账号已经登录了，那么删除老的cookie。
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//目的是实现单账号多地登录时挤占登录
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delCookie(cookie_name,oldCookie);
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}
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HttpServerCookie::Ptr data(new HttpServerCookie(shared_from_this(),cookie_name,uid,cookie,max_elapsed));
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//保存该账号下的新cookie
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_map_cookie[cookie_name][cookie] = data;
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return data;
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}
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HttpServerCookie::Ptr HttpCookieManager::getCookie(const string &cookie_name,const string &cookie) {
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lock_guard<recursive_mutex> lck(_mtx_cookie);
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auto it_name = _map_cookie.find(cookie_name);
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if(it_name == _map_cookie.end()){
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//不存在该类型的cookie
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return nullptr;
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}
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auto it_cookie = it_name->second.find(cookie);
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if(it_cookie == it_name->second.end()){
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//该类型下没有对应的cookie
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return nullptr;
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}
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if(it_cookie->second->isExpired()){
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//cookie过期
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DebugL << "cookie过期:" << it_cookie->second->getCookie();
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it_name->second.erase(it_cookie);
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return nullptr;
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}
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return it_cookie->second;
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}
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HttpServerCookie::Ptr HttpCookieManager::getCookie(const string &cookie_name,const StrCaseMap &http_header) {
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auto it = http_header.find("Cookie");
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if (it == http_header.end()) {
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return nullptr;
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}
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auto cookie = FindField(it->second.data(), (cookie_name + "=").data(), ";");
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if (!cookie.size()) {
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cookie = FindField(it->second.data(), (cookie_name + "=").data(), nullptr);
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}
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if(cookie.empty()){
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return nullptr;
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}
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return HttpCookieManager::Instance().getCookie(cookie_name , cookie);
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}
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HttpServerCookie::Ptr HttpCookieManager::getCookieByUid(const string &cookie_name,const string &uid){
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if(cookie_name.empty() || uid.empty()){
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return nullptr;
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}
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auto cookie = getOldestCookie(cookie_name,uid);
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if(cookie.empty()){
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return nullptr;
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}
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return getCookie(cookie_name,cookie);
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}
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bool HttpCookieManager::delCookie(const HttpServerCookie::Ptr &cookie) {
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if(!cookie){
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return false;
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}
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return delCookie(cookie->getCookieName(),cookie->getCookie());
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}
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bool HttpCookieManager::delCookie(const string &cookie_name,const string &cookie) {
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lock_guard<recursive_mutex> lck(_mtx_cookie);
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auto it_name = _map_cookie.find(cookie_name);
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if(it_name == _map_cookie.end()){
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return false;
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}
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return it_name->second.erase(cookie);
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}
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void HttpCookieManager::onAddCookie(const string &cookie_name,const string &uid,const string &cookie){
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//添加新的cookie，我们记录下这个uid下有哪些cookie，目的是实现单账号多地登录时挤占登录
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lock_guard<recursive_mutex> lck(_mtx_cookie);
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//相同用户下可以存在多个cookie(意味多地登录)，这些cookie根据登录时间的早晚依次排序
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_map_uid_to_cookie[cookie_name][uid][getCurrentMillisecond()] = cookie;
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}
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void HttpCookieManager::onDelCookie(const string &cookie_name,const string &uid,const string &cookie){
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lock_guard<recursive_mutex> lck(_mtx_cookie);
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//回收随机字符串
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_geneator.release(cookie);
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auto it_name = _map_uid_to_cookie.find(cookie_name);
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if(it_name == _map_uid_to_cookie.end()){
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//该类型下未有任意用户登录
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return;
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}
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auto it_uid = it_name->second.find(uid);
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if(it_uid == it_name->second.end()){
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//该用户尚未登录
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return;
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}
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//遍历同一名用户下的所有客户端，移除命中的客户端
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for(auto it_cookie = it_uid->second.begin() ; it_cookie != it_uid->second.end() ; ++it_cookie ){
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if(it_cookie->second != cookie) {
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//不是该cookie
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continue;
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}
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//移除该用户名下的某个cookie，这个设备cookie将失效
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it_uid->second.erase(it_cookie);
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if(it_uid->second.size() != 0) {
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break;
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}
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//该用户名下没有任何设备在线，移除之
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it_name->second.erase(it_uid);
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if(it_name->second.size() != 0) {
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break;
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}
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//该类型下未有任何用户在线，移除之
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_map_uid_to_cookie.erase(it_name);
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break;
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}
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}
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string HttpCookieManager::getOldestCookie(const string &cookie_name,const string &uid, int max_client){
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lock_guard<recursive_mutex> lck(_mtx_cookie);
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auto it_name = _map_uid_to_cookie.find(cookie_name);
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if(it_name == _map_uid_to_cookie.end()){
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//不存在该类型的cookie
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return "";
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}
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auto it_uid = it_name->second.find(uid);
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if(it_uid == it_name->second.end()){
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//该用户从未登录过
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return "";
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}
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if(it_uid->second.size() < MAX(1,max_client)){
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//同一名用户下，客户端个数还没达到限制个数
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return "";
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}
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//客户端个数超过限制，移除最先登录的客户端
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return it_uid->second.begin()->second;
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}
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/////////////////////////////////RandStrGeneator////////////////////////////////////
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string RandStrGeneator::obtain(){
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//获取唯一的防膨胀的随机字符串
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while (true){
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auto str = obtain_l();
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if(_obtained.find(str) == _obtained.end()){
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//没有重复
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_obtained.emplace(str);
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return str;
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}
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}
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}
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void RandStrGeneator::release(const string &str){
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//从防膨胀库中移除
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_obtained.erase(str);
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}
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string RandStrGeneator::obtain_l(){
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//12个伪随机字节 + 4个递增的整形字节，然后md5即为随机字符串
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auto str = makeRandStr(12,false);
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str.append((char *)&_index, sizeof(_index));
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++_index;
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return MD5(str).hexdigest();
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}
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}//namespace mediakit
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