cocos2d-x httpclient发送get或者post消息请求

网络编程 cocos2d-x里同样可以用两类网络通信方式：http和socket，http的主要用的是cURL，socket看上去要高端一些，用于更复杂的网络交互。

先写一个列子，看了列子就差不多了

1，首先头部引用

#include "stdio.h"
#include "stdlib.h"
#include "curl/curl.h"

2，头文件声明一个回调函数

static size_t HttpWriteString(uint8_t* ptr,size_t size,size_t nmemb,void *stream);  

3，在init里面写

    CURL *curl;  
    CURLcode res;  
    char buffer[10];  
//初始化  
    curl = curl_easy_init();  


//初始化OK后执行下面的代码  
    if (curl)   
    {  
//这是链接数据返回时调用的数据接收回调函数 
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, HttpWriteString);  
//这里设置的是当链接发生错误时终止运行  
curl_easy_setopt(curl, CURLOPT_FAILONERROR, true);  
//设置链接超时  
curl_easy_setopt(curl, CURLOPT_TIMEOUT, 10);  
//设置http链接到百度首页  
        curl_easy_setopt(curl, CURLOPT_URL, "http://127.0.0.1:8088/gametest/index.php?a=asdfasdf&b=asdfsdf");  
  
//执行链接后会返回一个curlCode，这个code有很多参数，0或者CURLE_OK表示链接成功，其它的就只好自己查阅了  
        res = curl_easy_perform(curl);  
        /* always cleanup */  
        curl_easy_cleanup(curl);  
        if (res == CURLE_OK)  
        {  
CCLog("----------------------------------success--------------");
        }  
        else  
        {  
CCLog("--------------------failure------------------------");
        }  
    }   
    else   
    {  
CCLog("----------------------------------no curl-----------------");
    }   

4，实现回调函数

size_t HelloWorld::HttpWriteString(uint8_t* ptr,size_t size,size_t number,void *stream)    
{    
    
    CCLog("%s",ptr);    
    return size*number;//这里一定要返回实际返回的字节数    
}  

这样就可以实现curl的弱联网技术了，这个事通过http请求的GET方式

——————————————————————————————第二个方法，这个还是好使的——————————————————————

.h文件里面的内容

#ifndef __LayerPaihan__#define __LayerPaihan__#include "cocos2d.h"#include "extensions/cocos-ext.h"#include "network/HttpClient.h"USING_NS_CC;USING_NS_CC_EXT;using namespace network;class LayerPaihan : public cocos2d::LayerColor{public: virtual bool init(); CREATE_FUNC(LayerPaihan);  //屏蔽下面的触摸事件 EventListenerTouchOneByOne * listener; bool onTouchBegan(Touch* touch, Event* event); void menuClose(cocos2d::Ref* psender);void menuCloseCallback(cocos2d::Ref* pSender);    void onMenuGetTestClicked(Ref* sender);    void onMenuPostBinaryTestClicked(Ref* sender);   // Http Response Callback    void onHttpRequestCompleted(cocos2d::network::HttpClient *sender, cocos2d::network::HttpResponse *response);Sprite* bg;};#endif

.cpp里面的代码

#include "LayerPaihan.h"#include "json\rapidjson.h"#include "json\document.h"#include "json\stringbuffer.h"using namespace rapidjson; bool LayerPaihan::init() { if(!LayerColor::initWithColor(Color4B(0,0,0,128))){return false; }Size visibleSize = Director::getInstance()->getVisibleSize();listener = EventListenerTouchOneByOne::create();      listener->setSwallowTouches(true);     listener->onTouchBegan = CC_CALLBACK_2(LayerPaihan::onTouchBegan, this);       _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);bg = Sprite::create("ph_bg.jpg");bg->setPosition(Point(visibleSize.width/2,visibleSize.height/2));this->addChild(bg);const int MARGIN = 40;    const int SPACE = 70;auto menuRequest = Menu::create();    menuRequest->setPosition(Point::ZERO);    bg->addChild(menuRequest);         HttpRequest* request = new  HttpRequest();    request->setUrl("http://127.0.0.1:8088/game/index.php");    request->setRequestType(HttpRequest::Type::GET);    request->setResponseCallback(this, httpresponse_selector(LayerPaihan::onHttpRequestCompleted));    request->setTag("GET test1");    HttpClient::getInstance()->send(request);    request->release();   auto close =MenuItemSprite::create(Sprite::createWithSpriteFrameName("x.png"),Sprite::createWithSpriteFrameName("x.png"),CC_CALLBACK_1(LayerPaihan::menuClose,this));close->setPosition(Point(bg->getContentSize().width,bg->getContentSize().height));auto menu = Menu::create(close, NULL);    menu->setPosition(Vec2::ZERO);bg->addChild(menu,6);return true; } bool LayerPaihan::onTouchBegan(Touch* touch, Event* event){ return true; } void LayerPaihan::menuClose(cocos2d::Ref* psender){this->setVisible(false);listener->setSwallowTouches(false); } void LayerPaihan::onMenuGetTestClicked(Ref* sender){    HttpRequest* request = new  HttpRequest();    request->setUrl("http://127.0.0.1:8088/game/index.php");    request->setRequestType(HttpRequest::Type::GET);    request->setResponseCallback(this, httpresponse_selector(LayerPaihan::onHttpRequestCompleted));    request->setTag("GET test1");    HttpClient::getInstance()->send(request);    request->release();}  void LayerPaihan::onMenuPostBinaryTestClicked(cocos2d::Ref *sender){    HttpRequest* request = new HttpRequest();    request->setUrl("http://127.0.0.1:8088/game/index.php");    request->setRequestType(HttpRequest::Type::POST);    request->setResponseCallback(this, httpresponse_selector(LayerPaihan::onHttpRequestCompleted));             const  char* postData = "params = Value";    request->setRequestData(postData,strlen(postData) );              request->setTag("POST test1");    HttpClient::getInstance()->send(request);    request->release();                    } void LayerPaihan::onHttpRequestCompleted(cocos2d::network::HttpClient *sender, cocos2d::network::HttpResponse *response){    if (!response) {        return;    }    if (0 != strlen(response->getHttpRequest()->getTag())) {        log("%s completed",response->getHttpRequest()->getTag());    }    long statusCode = response->getResponseCode();    char statusString[64] = {};         if (!response->isSucceed()) {        log("response failed");        log("error buffer: %s",response->getErrorBuffer());        return;    }    std::vector<char>* buffer = response->getResponseData();std::stringstream oss; for(unsigned int i=0;i < buffer->size();i++){ oss<<(*buffer)[i]; } std::string temp=oss.str(); const char * buf=temp.c_str(); rapidjson::Document doc;doc.Parse<0>(buf);//<通过Parse方法将Json数据解析出来if(doc.HasParseError()){CCLOG("GetParseError%s\n",doc.GetParseError());}if(doc.IsArray())///<判断是否是字符串{ for (unsigned int i = 0; i< doc.Size(); ++i) { const rapidjson::Value &index = doc[i]["index"];                 const rapidjson::Value &name = doc[i]["name"]; const rapidjson::Value &gold = doc[i]["gold"]; auto xs = Label::createWithSystemFont(index.GetString(),"Microsoft YaHei",18); xs->setAnchorPoint(Point(0,0)); xs->setPosition(Point(200,244-i*30)); bg->addChild(xs); auto xs_name = Label::createWithSystemFont(name.GetString(),"Microsoft YaHei",18); xs_name->setAnchorPoint(Point(0,0)); xs_name->setPosition(Point(310,244-i*30)); bg->addChild(xs_name); auto xs_gold = Label::createWithSystemFont(gold.GetString(),"Microsoft YaHei",18); xs_gold->setAnchorPoint(Point(0,0)); xs_gold->setPosition(Point(440,244-i*30)); bg->addChild(xs_gold);         }}}

完了以后加载network模块，重新编译一下

这个倒是挺好事的

——————————————————————————————下面是官方的文档————————————————————————

我试了总是不成功，要是有搞明白 的请指教，先谢谢了

介绍

HttpClient是HTTP客户端的接口。HttpClient封装了各种对象，处理cookies，身份认证，连接管理等。

概念

HttpClient的使用一般包含下面6个步骤：

• 创建 HttpRequest 的实例；
  
• 设置某种连接方法的类型（GET、POST等），这里通过setUrl传入待连接的地址；
  
• 设置响应回调函数，读取response；
  
• 添加请求到HttpClient任务队列；
• 释放连接。无论执行方法是否成功，都必须释放连接；
  
• 对得到后的内容进行处理。

如何使用

引入头文件和命名空间

#include "network/HttpClient.h"using namespace cocos2d::network;

HttpRequest 实例

我们将使用HttpRequest无参数的构造函数，它为大多数情况提供了一个很好的默认设置，所以我们使用它。

HttpRequest* request = new HttpRequest();

设置连接方法的类型和待连接的地址

由HTTP规范定义的各种方法对应各种不同的HttpRequest类。

我们将使用Get方法，这是一个简单的方法，它只是简单地取得一个URL，获取URL指向的文档。

request->setRequestType(HttpRequest::Type::GET);request->setUrl("http://www.httpbin.org/get");

设置回调

无论服务器返回怎样的状态，响应主体response body总是可读的，这至关重要。

request->setResponseCallback(CC_CALLBACK_2(HelloWorld::onHttpComplete,this));

在onHttpComplete里读取响应数据：

std::vector<char> *buffer = response->getResponseData();//Get the request data pointer back

添加请求到HttpClient任务队列

cocos2d::network::HttpClient::getInstance()->send(request);

释放连接

这是一个可以让整个流程变得完整的关键步骤, 我们必须告诉HttpClient，我们已经完成了连接，并且它现在可以重用。如果不这样做的话，HttpClient将无限期地等待一个连接释放，以便它可以重用。

要释放连接，使用:

request->release();

处理响应

现在，我们已经完成了与HttpClient的交互，可以集中精力做我们需要处理的数据。在这个例子中，我们仅仅将它在控制台上输出。

// dump datastd::vector *buffer = response->getResponseData();printf("Http Test, dump data: ");for (unsigned int i = 0; i < buffer->size(); i++){    printf("%c", (*buffer)[i]);}printf("\n");

如果你需要把response作为一个流来读取它里面的信息，上面的步骤将会同如何解析这个连接结合，当你处理完所有的数据后，关闭输入流，并释放该连接。

GET请求示例

下面是一个通过HttpClient的HTTP GET请求的例子。

    HttpRequest* request = new HttpRequest();    request->setUrl("http://www.baidu.com");    request->setRequestType(HttpRequest::Type::GET);    request->setResponseCallback(CC_CALLBACK_2(HelloWorld::onHttpRequestCompleted,this));    request->setTag("GET test");    cocos2d::network::HttpClient::getInstance()->send(request);    request->release();

POST请求示例

下面将发送一个POST请求到URL“http://httpbin.org/post”。

    HttpRequest* request = new HttpRequest();    request->setUrl("http://httpbin.org/post");    request->setRequestType(HttpRequest::Type::POST);    request->setResponseCallback(CC_CALLBACK_2(HelloWorld::onHttpRequestCompleted,this));    // write the post data    const char* postData = "visitor=cocos2d&TestSuite=Extensions Test/NetworkTest";    request->setRequestData(postData, strlen(postData));    request->setTag("POST test");    cocos2d::network::HttpClient::getInstance()->send(request);    request->release();

处理网络回调函数

void HelloWorld::onHttpRequestCompleted(HttpClient *sender, HttpResponse *response){    if (!response)    {        return;    }       // You can get original request type from: response->request->reqType    if (0 != strlen(response->getHttpRequest()->getTag()))    {        log("%s completed", response->getHttpRequest()->getTag());    }       int statusCode = response->getResponseCode();    char statusString[64] = {};    sprintf(statusString, "HTTP Status Code: %d, tag = %s", statusCode, response->getHttpRequest()->getTag());    _labelStatusCode->setString(statusString);    log("response code: %d", statusCode);       if (!response->isSucceed())    {        log("response failed");        log("error buffer: %s", response->getErrorBuffer());        return;    }    // dump data    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");}

Android

需要注意的是，如果你是Android环境，不要忘了在您的应用程序的Manifest 中增加相应的权限：

<uses-permission android:name=”android.permission.INTERNET” />

详细代码可参照..\tests\Cpp\TestCpp\Classes\ExtensionsTest\NetworkTest\HttpClientTest.cpp