coco2dx c++ HTTP实现

时间:2023-03-08 22:36:04

coco2dx c++ HTTP实现

达到的结果如下面的

iPhone截图coco2dx c++ HTTP实现

android 日志截图coco2dx c++ HTTP实现

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流程图例如以下coco2dx c++ HTTP实现

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功能主要通过CURL c pthread 实现 我实现的不是多线程断点(假设要实现能够依据我这个进行加入任务序列,可參考 cocos2d-x 中AssetsManager的实现,事实上我的部分也是參考这个写的 为什么写这个呢 原因就是 AssetsManager是不支持断点续传的)

博客地址:http://blog.****.net/vpingchangxin/article/details/22309067

详细能够去CURL官网或者找资料科普一下

PS:假设是版本号公布最后设置超时时间20秒左右否则下载会占用很多其它下载实现效率等问题 我是为了測试 设置超时时间为2秒

1.先创建一个界面进行控制进行下载、停止、删除、进度 并绑定事件

2.在进行下载中开一个线程进行下载 (由于牵涉到UI,不开线程UI会卡着阻塞UI线程直到下载完毕)以下是事件中的控制 HelloWorldSecene.cpp中的实现

void HelloWorld::menuCallback(CCObject* pSender) {
CCMenuItem *item = (CCMenuItem *)pSender;
switch (item->getTag()) {
case 1: // down start
CCDirector::sharedDirector()->getScheduler()->scheduleSelector(schedule_selector(HelloWorld::updateUI), this, 0, false); // HttpClient中參考
isStop = false;
this->threadStart();
break;
case 2: // down stop
isStop = true;
break;
case 3:
if (isStop) {
CCLog("downFilePath:%s",downFilePath.c_str());
if (access(downFilePath.c_str(), 0) == 0) {
remove(downFilePath.c_str());
CCMessageBox("删除成功", "温馨提示");
}else{
CCMessageBox("没有找到文件文件夹", "温馨提示");
}
}else{
CCMessageBox("下载中或没有文件下载", "温馨提示");
} break;
default:
break;
}
}

3。实现线程类并回调设置

// 启动线程的方法
int HelloWorld::threadStart() {
pthread_mutex_init(&g_downloadMutex, NULL);
int errCode=0;
pthread_t th_curlDown; // 线程初始化
do {
pthread_attr_t tAttr;
errCode=pthread_attr_init(&tAttr);
CC_BREAK_IF(errCode!=0);
errCode=pthread_attr_setdetachstate(&tAttr, PTHREAD_CREATE_DETACHED);
if(errCode!=0) {
pthread_attr_destroy(&tAttr);
break;
}
errCode=pthread_create(&th_curlDown, &tAttr, thread_funcation, this);
} while (0);
return errCode;
} // 须要线程来完毕的功能都写在这个函数里
void* HelloWorld::thread_funcation(void *arg) {
CCLOG("thread started...");
HelloWorld *hw = (HelloWorld*)arg;
hw->ccc = new CurlDown("http://developer.baidu.com/map/static/doc/output/BaiduMap_AndroidSDK_v2.4.0_All.zip",hw->downFilePath);
// ccc->mDownloadUrl = "http://developer.baidu.com/map/static/doc/output/BaiduMap_AndroidSDK_v2.4.0_All.zip";
// int leng = ccc->getDownloadFileLenth();
hw->ccc->setDelegate(hw);
hw->ccc->downloadControler(); return NULL;
}

4.实现回调进度、成功、错误(里面用到线程锁对数据进度更新UI。本来对线程就不熟悉,问了群里面的大牛,看了不少资料)

void HelloWorld::onError(CurlDown::ErrorCode errorCode){
CCLog("error"); pthread_mutex_lock(&g_downloadMutex);
updateStr = "error";
pthread_mutex_unlock(&g_downloadMutex); CCDirector::sharedDirector()->getScheduler()->unscheduleSelector(schedule_selector(HelloWorld::updateUI), this);
}
void HelloWorld::onProgress(double percent, void *delegate, string filefullPath){ // 下载进度
CCLog("donw progress:%.2f%%",percent); if (isStop) {
CurlDown * cd = (CurlDown *)delegate;
// pthread_mutex_lock(&g_downloadMutex);
cd->setStopDown();
// pthread_mutex_unlock(&g_downloadMutex);
} pthread_mutex_lock(&g_downloadMutex);
const char * per =CCString::createWithFormat("donw progress:%.2f%%",percent)->getCString();
updateStr = per;
downFilePath = filefullPath;
pthread_mutex_unlock(&g_downloadMutex);
}
void HelloWorld::onSuccess(string filefullPath){
CCLog("success"); pthread_mutex_lock(&g_downloadMutex);
updateStr = "success";
downFilePath = filefullPath;
pthread_mutex_unlock(&g_downloadMutex);
}

5.CurlDown.h CurlDown.cpp类实现 (能够直接抽取出来用于不论什么地方,没有牵涉到cocos2d-x部分。cocos2d-x 部分能够删除没关系)

1)对类初始化

static pthread_mutex_t g_downloadMutex_1;

CurlDown::~CurlDown(){
mFileLenth = 0;
}
CurlDown::CurlDown():isStop(false),mDownloadUrl(""),timeout(2){ // test timeout 2 seconds. if release timeout 20 seconds
mFileLenth = 0;
mFilePath = "";
pthread_mutex_init(&g_downloadMutex_1, NULL);
}
CurlDown::CurlDown(string downUrl,string filePath):mFileLenth(0),isStop(false),mDownloadUrl(downUrl),timeout(2),mFilePath(filePath){ // test timeout 2 seconds. if release timeout 20 seconds
mDownloadUrl = downUrl;
pthread_mutex_init(&g_downloadMutex_1, NULL);
} void CurlDown::setDelegate(CurlDownDelegate * delegate) {
mDelegate = delegate;
}

2)控制下载方法

void CurlDown::downloadControler() {
CCLog("--1-");
mFileLenth = getDownloadFileLenth(); // 获取远程文件大小
if (mFileLenth <= 0) {
cout << "download file fail..." << endl;
mDelegate->onError(kNetwork);
return;
}
vector<string> searchPaths = CCFileUtils::sharedFileUtils()->getSearchPaths();
vector<string>::iterator iter = searchPaths.begin();
searchPaths.insert(iter, mFilePath);
CCFileUtils::sharedFileUtils()->setSearchPaths(searchPaths); CCLog("--2-mFileLenth:%f",mFileLenth);
mFileName = mDownloadUrl.substr(mDownloadUrl.rfind('/') + 1);
CCLog("--3-");
CCLog("mFileName:%s;",mFileName.c_str());
// mFilePath = CCFileUtils::sharedFileUtils()->getWritablePath();
// CCLog("--5-");
mFilePath = mFilePath + mFileName;
CCLog("mFilePath:%s",mFilePath.c_str());
CCLog("--6-");
bool ret = false;
while (true){ // 循环下载 每30秒进行下载 避免断网情况
ret = download(); //直接下载 进行阻塞线程
CCLog("----stop---%s------",isStop? "true":"false");
if (isStop) { // 假设进行停止 break
CCLog("----stop---------");
break;
}
if (ret ){ //下载完毕
break;
}
sleep(0.5); //每次下载中间间隔0.5秒
} if (ret) {
CCLog("download ok");
mDelegate->onSuccess(mFilePath);
} else {
CCLog("download fail");
mDelegate->onError(kUncompress);
}
}

3)核心下载

#pragma mark 进行下载
bool CurlDown::download() {
FILE *fp = NULL;
if(access(mFilePath.c_str(), 0)==0) { // 以二进制形式追加
fp = fopen(mFilePath.c_str(), "ab+");
} else { // 二进制写
fp = fopen(mFilePath.c_str(), "wb");
} if (fp == NULL) {// 假设文件初始化失败进行返回
return false;
} // 读取本地文件下载大小
long localFileLenth = getLocalFileLength(); //已经下载的大小
CCLog("filePath:%s。leng:%ld",mFilePath.c_str() , localFileLenth ); //4397779 //3377875 CURL *handle = curl_easy_init();
std::string packageUrl = mDownloadUrl; //下载地址+下载文件名称
curl_easy_setopt(handle, CURLOPT_URL, packageUrl.c_str()); // http://curl.haxx.se/libcurl/c/fopen.html
curl_easy_setopt(handle, CURLOPT_TIMEOUT, timeout);
curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, my_write_func); //写文件回调方法
curl_easy_setopt(handle, CURLOPT_WRITEDATA, fp); // 写入文件对象
curl_easy_setopt(handle, CURLOPT_RESUME_FROM, localFileLenth); // 从本地大小位置进行请求数据
// curl_easy_setopt(handle, CURLOPT_RESUME_FROM_LARGE, localFileLenth); // 坑
curl_easy_setopt(handle, CURLOPT_NOPROGRESS, 0L);
curl_easy_setopt(handle, CURLOPT_PROGRESSFUNCTION, my_progress_func ); //下载进度回调方法
curl_easy_setopt(handle, CURLOPT_PROGRESSDATA, this); // 传入本类对象 CURLcode res = curl_easy_perform(handle);
fclose(fp);
return res == CURLE_OK;
}

以下大家要问道的就是求源代码(^..^)源代码已经上传github https://github.com/pingchangxin/BPDownload cesd
下载位置:http://download.****.net/detail/vpingchangxin/7108649

我就不再这里mac她跑到隔壁 windows在没有运行(至win繁琐的头痛的结构)