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cocos2dx Http网络编程

2024-07-16 07:33:39   221人阅读

转自：http://blog.csdn.net/wangbin_jxust/article/details/9632771，http://blog.csdn.net/wangbin_jxust/article/details/9707873

联网游戏开发中，经常遇到http编程，接下来就分三次对cocos2dx的网络编程进阶。

本博文中先介绍建立基本的http通信并得到返回信息。

1.创建cocos2dx工程。

2.项目引用外部库。

如果要使用cocos2dx的CCHttpClient来进行网络访问，则需要引入cocos2dx的相关库，详细步骤如下:

右键单击项目->属性->c/c++->常规，在右边的附件包含目录中添加cocos2dx的extensions目录对应的路径。

然后,右键单击项目->属性->链接器->输入，在右边的附件依赖项中添加libcurl_imp.lib和libExtensions.lib两个库，用分号隔开。

如果不引入extensions文件夹，会出现找不到CCHttpClient的错误；

如果不引入libcurl_imp.lib和libExtensions.lib两个库，编译项目时也会出现报错。

另外注意引入头文件:

#include "cocos-ext.h"

 

3.添加下载按钮和回调函数。

添加下载按钮:
CCMenuItemImage *pDownloadItem = CCMenuItemImage::create(            "bt_blue_light.png",            "bt_blue_light.png",            this,            menu_selector(HelloWorld::menuDownloadCallback)        );        CC_BREAK_IF(!pDownloadItem);        CCSize pWinSize = CCDirector::sharedDirector()->getWinSize();            CCMenu* pDownloadMenu = CCMenu::create(pDownloadItem, NULL);        pDownloadMenu->setPosition(ccp(50  ,50));        CC_BREAK_IF(! pDownloadMenu);        this->addChild(pDownloadMenu, 1);

添加按钮的回调函数:

void HelloWorld::menuDownloadCallback(CCObject* pSender){    cocos2d::extension::CCHttpRequest* request = new cocos2d::extension::CCHttpRequest();    request->setUrl("http://www.oschina.net/action/api/news_list");    request->setRequestType(cocos2d::extension::CCHttpRequest::kHttpPost);    std::vector<std::string> headers;    headers.push_back("Content-Type: application/json; charset=utf-8");    request->setHeaders(headers);    const char* postData = http://www.mamicode.com/"catalog=2&pageIndex=1&pageSize=5";    request->setRequestData(postData ,strlen(postData));    request->setResponseCallback(this, callfuncND_selector(HelloWorld::onHttpRequestCompleted));    request->setTag("Post_My_Data");    cocos2d::extension::CCHttpClient::getInstance()->send(request);    request->release();}
按钮的回调函数里向服务器发起http请求了，request->setResponseCallback(this, callfuncND_selector(HelloWorld::onHttpRequestCompleted))一行代码，向请求结束时添加了onHttpRequestCompleted回调函数

4.为http request 结束增加回调函数并读取网络数据

void HelloWorld::onHttpRequestCompleted(cocos2d::CCNode *sender ,void *data){    AllocConsole();    freopen("CONIN$", "r", stdin);    freopen("CONOUT$", "w", stdout);    freopen("CONOUT$", "w", stderr);    cocos2d::extension::CCHttpResponse *response = (cocos2d::extension::CCHttpResponse*)data;       if (!response)      {        return;      }      if (0 != strlen(response->getHttpRequest()->getTag()))     {        CCLog("%s completed", response->getHttpRequest()->getTag());    }     int statusCode = response->getResponseCode();     char statusString[64] = {};     sprintf(statusString ,"Http status code:%d ,tag = %s" ,statusCode ,response->getHttpRequest()->getTag());     CCLog("response code:%d" ,statusCode);     if (!response->isSucceed())     {         CCLog("response failed");         CCLog("error buffer:%s" ,response->getErrorBuffer());     }     std::vector<char> *buffer = response->getResponseData();     printf("Http response,dump data:");     std::string result = "";     for (unsigned int i = 0; i < buffer->size(); i ++)     {        printf("%c" ,(*buffer)[i]);     }}

 debug时就能看到reponse中服务器返回的数据了。

打印到窗体中:

 

转自：http://blog.csdn.net/sakana87320/article/details/8595242

概述

使用CCHttpClient一般有6步：

  1. 创建CCHttpRequest实例。
  2. 设置Url和请求类型。
  3. 使用CCHttpClient向Url发出请求(连接Url)。
  4. 读取响应。
  5. 释放连接。
  6. 响应处理。

如何使用

获取CCHttpRequest实例

使用一个无参构造方法创建一个CCHttpRequest的实例。CCHttpRequest无参构造方法可以获取一个默认设置的CCHttpRequest实例，该实例可以满足大多数需求。

cocos2d::extension::CCHttpRequest* request = new cocos2d::extension::CCHttpRequest();

设置Url

request->setUrl("blog.csdn.net/sakana87320/article/details/8595242");

设置GET请求

//设置为GET请求：kHttpGetrequest->setRequestType(cocos2d::extension::CCHttpRequest::kHttpGet);//设置处理响应回调函数request->setResponseCallback(this, callfuncND_selector(HttpClientTest::onHttpRequestCompleted));request->setTag("GET test");

设置POST请求

//设置为POST请求：kHttpPostrequest->setRequestType(cocos2d::extension::CCHttpRequest::kHttpPost);//设置处理响应回调函数request->setResponseCallback(this, callfuncND_selector(HttpClientTest::onHttpRequestCompleted));request->setTag("POST test");

发送请求

cocos2d::extension::CCHttpClient::getInstance()->send(request);

处理返回数据(响应回调函数）

void HttpClientTest::onHttpRequestCompleted(cocos2d::CCNode *sender, void *data){    CCHttpResponse *response = (CCHttpResponse*)data;    if (!response)    {        return;    }    // 你可以使用: response->request->reqType获取请求类型    if (0 != strlen(response->getHttpRequest()->getTag()))    {        CCLog("%s completed", response->getHttpRequest()->getTag());    }    //获取状态码    int statusCode = response->getResponseCode();    char statusString[64] = {};    sprintf(statusString, "HTTP Status Code: %d, tag = %s", statusCode, response->getHttpRequest()->getTag());    m_labelStatusCode->setString(statusString);    CCLog("response code: %d", statusCode);    if (!response->isSucceed())    {    //访问失败获取错误信息        CCLog("response failed");        CCLog("error buffer: %s", response->getErrorBuffer());        return;    }    // 获取返回数据。    std::vector<char> *buffer = response->getResponseData();    printf("Http Test, dump data: ");    for (unsigned int i = 0; i < buffer->size(); i++)    {        printf("%c", (*buffer)[i]);    }    printf("\n");}

释放连接

request->release();

注意

Android平台下不要忘了添加访问网络的权限。

 


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