集成cocos2dx中的CHttpClient到lua中

不知道为什么cocos2dx中似乎没有把extensions/network里的HttpClient集成进去，自己试了一下DIY也不是很难，现总结如下

首先CCHttpRequest中的setResponseCallback需要处理一下，因为这里我们需要的是一个lua的回调而并非c++的，

处理方案参考CCSchduler中的scheduleScriptFunc，采用lua的handler来解决

最终代码如下：

pkg文件

class CCHttpClient : CCObject
{
static CCHttpClient *getInstance();

static void destroyInstance();

void send(CCHttpRequest* request);

void setTimeoutForConnect(int value);

int getTimeoutForConnect();

void setTimeoutForRead(int value);

int getTimeoutForRead();
};

class CCHttpRequest : CCObject
{
typedef enum
{
kHttpGet,
kHttpPost,
kHttpPut,
kHttpDelete,
kHttpUnkown,
} HttpRequestType;

void setRequestType(HttpRequestType type);

HttpRequestType getRequestType();

void setUrl(const char* url);

const char* getUrl();

void setRequestData(const char* buffer, unsigned int len);

char* getRequestData();

int getRequestDataSize();

void setTag(const char* tag);

const char* getTag();
};

class CCLuaHttpRequest: CCHttpRequest
{
void setResponseScriptCallback(LUA_FUNCTION aHandler);

static CCLuaHttpRequest* create();

static bool mkdirs(std::string aDir);
};

LuaHttpRequest.h

#ifndef CCLUAHTTPREQUEST_H_
#define CCLUAHTTPREQUEST_H_

#include <network/HttpClient.h>

USING_NS_CC;
USING_NS_CC_EXT;

class CCLuaHttpRequest: public CCHttpRequest
{
public:

CCLuaHttpRequest();

virtual ~CCLuaHttpRequest();

public:

static CCLuaHttpRequest* create();

static bool mkdirs(std::string aDir);

/**
* 设置一个用于回调的lua函数
*/
void setResponseScriptCallback(unsigned int aHandler);

private:

/**
* 默认的用于c++的回调，由这里统一处理到lua的回调
*/
void responseScriptCallback(CCHttpClient* apClient, CCHttpResponse* apResponse);

private:

/**
* 当前保存的handler
*/
unsigned int mHandler;
};

#endif /* CCLUAHTTPREQUEST_H_ */

LuaHttpRequest.cpp

#include "LuaHttpRequest.h"
#include "CCLuaEngine.h"
#include <sys/stat.h>
#include <sys/types.h>
#include <errno.h>

CCLuaHttpRequest::CCLuaHttpRequest() :
mHandler(0)
{

}

CCLuaHttpRequest::~CCLuaHttpRequest()
{
}

CCLuaHttpRequest* CCLuaHttpRequest::create()
{
return new CCLuaHttpRequest;
}

bool CCLuaHttpRequest::mkdirs(std::string aDir)
{
if (aDir.size() == 0)
{
return true;
}

CCLOG("creating dir:%s", aDir.c_str());
bool isFirst = aDir[0] == '/';
bool isLast = false;
for (unsigned int i = 1; i < aDir.size(); i++)
{
if (aDir[i] == '/')
{
if (isLast)
{
continue;
}
isLast = true;

if (isFirst)
{
isFirst = false;
continue;
}

std::string path = aDir.substr(0, i);
if (CCFileUtils::sharedFileUtils()->isFileExist(path.c_str()))
{
CCLOG("path:%s exist", path.c_str());
continue;
}
int ret = mkdir(path.c_str(), 0700);
if (ret && errno != EEXIST)
{
CCLOG("mkdir:%s failed", path.c_str());
return false;
}
else
{
CCLOG("path:%s created", path.c_str());
}
}
else
{
isLast = false;
}
}
return true;
}

void CCLuaHttpRequest::setResponseScriptCallback(unsigned int aHandler)
{
mHandler = aHandler;
setResponseCallback(this, httpresponse_selector(CCLuaHttpRequest::responseScriptCallback));
}

void CCLuaHttpRequest::responseScriptCallback(CCHttpClient* apClient, CCHttpResponse* apResponse)
{
CCLuaEngine* pEngine =
dynamic_cast<CCLuaEngine*>(CCScriptEngineManager::sharedManager()->getScriptEngine());
CCLuaStack* pStack = pEngine->getLuaStack();
bool isSucceed = apResponse->isSucceed();
int status = apResponse->getResponseCode();
const char* errorBuffer = apResponse->getErrorBuffer();
std::vector<char>* headerBuffer = apResponse->getResponseHeader();
std::vector<char>* bodyBuffer = apResponse->getResponseData();
std::string header(headerBuffer->begin(), headerBuffer->end());
std::string body(bodyBuffer->begin(), bodyBuffer->end());
pStack->pushCCObject(apResponse->getHttpRequest(), "CCHttpRequest");
pStack->pushBoolean(isSucceed); //是否成功
pStack->pushString(body.c_str(), body.size()); //body
pStack->pushString(header.c_str()); //header
pStack->pushInt(status); //状态码
pStack->pushString(errorBuffer); //错误描述
pStack->executeFunctionByHandler(mHandler, 6);
pStack->clean();
}

注意使用tolua++的时候需要注意一下-L basic.lua

最终使用的lua代码如下

local request = CCLuaHttpRequest:create()
request:setUrl(url)
request:setTag(tag)
request:setRequestType(CCHttpRequest.kHttpGet)
request:setResponseScriptCallback(dlImageCallback)
CCHttpClient:getInstance():send(request)
request:release()