cocos2d-x httpclient发送get或者post消息请求

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本文介绍如何在Cocos2d-x中使用cURL和HttpClient进行网络编程，包括HTTP GET和POST请求的示例代码及响应处理。

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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 data
std::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