cocos2dx 3.x lua 网络加载并且保存资源，unix、linux
#ifndef __DazzleParkour__TextLoader__
#define __DazzleParkour__TextLoader__
#include <stdio.h>
#include "cocos2d.h"
#include "network/HttpClient.h"
#include "CCLuaValue.h"
using namespace cocos2d::network;
using namespace cocos2d;
using namespace std;
class TextLoader
{
public:
static TextLoader*create(const char* url,const char* requestData,const char* tag,string textName,string savePath,LUA_FUNCTION callback){
TextLoader * instance = new TextLoader();
instance->doHttpRequest(url,requestData,tag,textName,savePath,callback);
return instance;
}
void onHttpRequestImageCompleted(HttpClient *sender, HttpResponse *response);
void doHttpRequest(const char* url,const char* requestData,const char* tag,string textName,string savePath,LUA_FUNCTION callback);
private:
string m_textName;
string m_savePath;
char m_url[500];
LUA_FUNCTION m_callback;
};
#endif
//安卓项目需要获取网络权限
#include <stdio.h>
#include "TextLoader.h"
#include "ImageLoader.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <dirent.h>
#include "CCLuaStack.h"
#include "CCLuaEngine.h"
#include "StringUtils.h"
void TextLoader::onHttpRequestImageCompleted(HttpClient *sender, HttpResponse *response)
{
if (!response)
{
return;
}
const char* tag = response->getHttpRequest()->getTag();
if (0 != strlen(tag))
{
log("%s completed", response->getHttpRequest()->getTag());
}
if (!response->isSucceed())
{
log("error buffer: %s", response->getErrorBuffer());
log("error buffer: %s",this->m_url
);
return;
}
//检测当前目录下是否存在保存目录，不存在则创建
DIR *dir = nullptr;
dir = opendir (this->m_savePath.c_str());
if (!dir)
{
vector<string> v;
split(this->m_savePath,v,"/");
string path = FileUtils::getInstance()->getWritablePath();
for (size_t i = 0; i < v.size(); ++ i)
{
path+=v[i];
path+="/";
int ret = mkdir(path.c_str(), S_IRWXU | S_IRWXG | S_IRWXO);
if(ret!=0)
{
log("fail to createDirectory");
}
}
}
string path = FileUtils::getInstance()->getWritablePath()+this->m_textName;
FILE*file=fopen(path.c_str(),"w+");
std::vector<char> *buffer = response->getResponseData();
string data = string(buffer->begin(),buffer->end());
fwrite(data.c_str(), sizeof(char), data.size(), file);
fclose(file);
LuaStack* pStack = LuaEngine::getInstance()->getLuaStack();//调用lua回调函数
//第一个参数是函数的整数句柄，第二个参数是函数参数个数
pStack->clean();
pStack->executeFunctionByHandler(this->m_callback,0);
}
void TextLoader::doHttpRequest(const char* url,const char* requestData,const char* tag,string textName,string savePath,LUA_FUNCTION callback)
{
HttpRequest* request = new HttpRequest();
request->setUrl(url);
request->setRequestType(HttpRequest::Type::POST);
//这是回调对象和回调函数
request->setResponseCallback(CC_CALLBACK_2(TextLoader::onHttpRequestImageCompleted, this));
request->setTag(tag);
//请求的数据
if(strlen(requestData)!=0){
request->setRequestData(requestData,strlen(requestData));
}
HttpClient::getInstance()->send(request);
this->m_textName = textName;
this->m_savePath = savePath;
this->m_callback = callback;
strcpy(this->m_url, url);
//释放内存
request->release();
}
注意：在lua取栈的回调函数需要使用调用
LUA_FUNCTION handler = toluafix_ref_function(tolua_S,栈位置,0);
TextLoader* ret = TextLoader::create(arg0, arg1, arg2, arg3, arg4, handler);
自带lua打包工具会使用：
bool ok = luaval_to_int32(tolua_S, 7,(int *)&handler, "TextLoader:create");
笔者试过，不可行。