本文共 6018 字，大约阅读时间需要 20 分钟。
CCHttpRequest 本身是一个CCObject 对象， 用于lua的create函数 默认会retain request对象一次，因此需要在lua的callback函数里面处理结束request之后，需要release对象否则会内存泄露。
实际的引用计数变化的过程如下：
new 引用计数 = 1
autorelease 引用计数先变成2 再变成1 ， 将对象加入自动释放池子里面之后，对象引用计数会+1, 接着会调用对象的release方法，对象引用计数又减去1
retain 引用计数变成 2
start 开始http请求，对象加入schedule 的列表里面 引用计数+1 引用计数变成3
update 过程中，到下一个update循环的时候，对象的引用计数会减去1，因为自动释放池子release了这个对象，这时候引用计数变成2
http请求处理结束，update函数里面检测结束，取消schedule 更新，但是因为当前在函数体内，所以不会立即release掉request对象，而是等待本次回合结束的时候再release对象
http请求结束，在callback函数里面release 掉对象，引用计数-1 变成 1
在本次更新回合结束，schedule模块，将标记删除的对象的引用计数-1， 引用计数 = 0 对象被删除掉。
001 | #include "network/CCHttpRequest.h" |
002 | #include "network/CCHttpRequest_impl.h" |
003 | #include "cocos2d.h" |
004 |
005 | #include "CCLuaEngine.h" |
006 |
007 | using namespace cocos2d; |
008 |
009 | NS_CC_EXT_BEGIN |
010 |
011 | CCHttpRequest* CCHttpRequest::createWithUrl(CCHttpRequestDelegate* delegate, |
012 | const char* url, |
013 | CCHttpRequestMethod method, |
014 | bool isAutoReleaseOnFinish) |
015 | { |
016 | CCHttpRequest* request = new CCHttpRequest(delegate, url, method, isAutoReleaseOnFinish); |
017 | request->initHttpRequest(); |
018 | request->autorelease(); |
019 | if (isAutoReleaseOnFinish) |
020 | { |
021 | request->retain(); |
022 | } |
023 | return request; |
024 | } |
025 |
026 | CCHttpRequest* CCHttpRequest::createWithUrlLua(int nHandler, const char* url, bool isGet) |
027 | { |
028 | CCHttpRequest* request = new CCHttpRequest(NULL, url, isGet?CCHttpRequestMethodGET:CCHttpRequestMethodPOST, true); |
029 | request->m_luaHandler = nHandler; |
030 | request->initHttpRequest(); |
031 | request->autorelease(); |
032 | request->retain(); |
033 | CCLog("request count is? %d", request->retainCount()); |
034 | return request; |
035 | } |
036 |
037 | bool CCHttpRequest::initHttpRequest(void) |
038 | { |
039 | m_request = new CCHttpRequest_impl(m_url.c_str(), m_method); |
040 | return true; |
041 | } |
042 |
043 | CCHttpRequest::~CCHttpRequest(void) |
044 | { |
045 | delete (CCHttpRequest_impl*)m_request; |
046 | } |
047 |
048 | void CCHttpRequest::addRequestHeader(const char* key, const char* value) |
049 | { |
050 | if (key && value) |
051 | { |
052 | ((CCHttpRequest_impl*)m_request)->addRequestHeader(key, value); |
053 | } |
054 | } |
055 |
056 | void CCHttpRequest::addPostValue(const char* key, const char* value) |
057 | { |
058 | if (key && value) |
059 | { |
060 | ((CCHttpRequest_impl*)m_request)->addPostValue(key, value); |
061 | } |
062 | } |
063 |
064 | void CCHttpRequest::setPostData(const char* data) |
065 | { |
066 | if (data) |
067 | { |
068 | ((CCHttpRequest_impl*)m_request)->setPostData(data); |
069 | } |
070 | } |
071 |
072 | void CCHttpRequest::setTimeout(float timeout) |
073 | { |
074 | ((CCHttpRequest_impl*)m_request)->setTimeout(timeout); |
075 | } |
076 |
077 | bool CCHttpRequest::getIsInProgress(void) |
078 | { |
079 | return ((CCHttpRequest_impl*)m_request)->getIsInProgress(); |
080 | } |
081 |
082 | void CCHttpRequest::start(bool isCached) |
083 | { |
084 | CCDirector::sharedDirector()->getScheduler()->unscheduleUpdateForTarget(this); |
085 | if (((CCHttpRequest_impl*)m_request)->start()) |
086 | { |
087 | CCDirector::sharedDirector()->getScheduler()->scheduleUpdateForTarget(this, 0, false); |
088 | } |
089 | } |
090 |
091 | void CCHttpRequest::cancel(void) |
092 | { |
093 | CCDirector::sharedDirector()->getScheduler()->unscheduleUpdateForTarget(this); |
094 | ((CCHttpRequest_impl*)m_request)->cancel(); |
095 | } |
096 |
097 | void CCHttpRequest::clearDelegatesAndCancel(void) |
098 | { |
099 | m_delegate = NULL; |
100 | cancel(); |
101 | } |
102 |
103 | int CCHttpRequest::getResponseStatusCode(void) { |
104 | return ((CCHttpRequest_impl*)m_request)->getResponseStatusCode(); |
105 | } |
106 |
107 | const char* CCHttpRequest::getResponseString(void) |
108 | { |
109 | return ((CCHttpRequest_impl*)m_request)->getResposeString().c_str(); |
110 | } |
111 |
112 | const void* CCHttpRequest::getResponseData(int* dataLength) |
113 | { |
114 | return ((CCHttpRequest_impl*)m_request)->getResponseData(); |
115 | } |
116 |
117 | int CCHttpRequest::getResponseDataLength() |
118 | { |
119 | return ((CCHttpRequest_impl*)m_request)->getResponseDataLength(); |
120 | } |
121 |
122 | CCHttpRequestError CCHttpRequest::getErrorCode(void) |
123 | { |
124 | return ((CCHttpRequest_impl*)m_request)->getErrorCode(); |
125 | } |
126 |
127 | const char* CCHttpRequest::getErrorMessage(void) |
128 | { |
129 | return ((CCHttpRequest_impl*)m_request)->getErrorMessage(); |
130 | } |
131 |
132 | void CCHttpRequest::update(float dt) |
133 | { |
134 | CCLog("update Request state %d", retainCount()); |
135 | CCHttpRequest_impl* request = (CCHttpRequest_impl*)m_request; |
136 | if (!request || !request->getIsInProgress()) |
137 | { |
138 | CCDirector::sharedDirector()->getScheduler()->unscheduleUpdateForTarget(this); |
139 | } |
140 | |
141 | if (request->getIsCompleted()) |
142 | { |
143 | if (m_delegate) m_delegate->requestFinished(this); |
144 | |
145 | if (m_luaHandler) |
146 | { |
147 | bool isSuc = (request->getErrorCode()==CCHttpRequestErrorNone); |
148 | CCLuaEngine* engine = CCLuaEngine::defaultEngine(); |
149 |
150 | engine->getLuaStack()->clean(); |
151 | engine->getLuaStack()->pushBoolean(isSuc); |
152 | engine->getLuaStack()->executeFunctionByHandler(m_luaHandler, 1); |
153 | CCLog("afterHandler retainCount %d", retainCount()); |
154 | /* |
155 | cocos2d::CCLuaValueDict dict; |
156 | dict["name"] = cocos2d::CCLuaValue::stringValue("completed"); |
157 | dict["request"] = cocos2d::CCLuaValue::ccobjectValue(this, "CCHttpRequest"); |
158 | cocos2d::CCLuaEngine* engine = cocos2d::CCLuaEngine::defaultEngine(); |
159 | engine->cleanStack(); |
160 | engine->pushCCLuaValueDict(dict); |
161 | engine->executeFunctionByHandler(m_luaHandler, 1); |
162 | */ |
163 | } |
164 | |
165 | } |
166 | else if (request->getIsCancelled()) |
167 | { |
168 | if (m_delegate) m_delegate->requestFailed(this); |
169 | |
170 | if (m_luaHandler) |
171 | { |
172 | CCLuaEngine* engine = CCLuaEngine::defaultEngine(); |
173 |
174 | engine->getLuaStack()->clean(); |
175 | engine->getLuaStack()->pushBoolean(false); |
176 | engine->getLuaStack()->executeFunctionByHandler(m_luaHandler, 1); |
177 | /* |
178 | cocos2d::CCLuaValueDict dict; |
179 | dict["name"] = cocos2d::CCLuaValue::stringValue("failed"); |
180 | dict["request"] = cocos2d::CCLuaValue::ccobjectValue(this, "CCHttpRequest"); |
181 | cocos2d::CCLuaEngine* engine = cocos2d::CCLuaEngine::defaultEngine(); |
182 | engine->cleanStack(); |
183 | engine->pushCCLuaValueDict(dict); |
184 | engine->executeFunctionByHandler(m_luaHandler, 1); |
185 | */ |
186 | } |
187 | } |
188 | } |
189 |
190 | NS_CC_EXT_END |
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