axmol/cocos/network/HttpRequest.h

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 Copyright (c) 2013-2014 Chukong Technologies Inc.
 
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#ifndef __HTTP_REQUEST_H__
#define __HTTP_REQUEST_H__

#include <string>
#include <vector>
#include "base/CCRef.h"
#include "2d/ccMacros.h"

NS_CC_BEGIN

namespace network {

class HttpClient;
class HttpResponse;

typedef std::function<void(HttpClient* client, HttpResponse* response)> ccHttpRequestCallback;
typedef void (cocos2d::Ref::*SEL_HttpResponse)(HttpClient* client, HttpResponse* response);
#define httpresponse_selector(_SELECTOR) (cocos2d::network::SEL_HttpResponse)(&_SELECTOR)

/** 
 @brief defines the object which users must packed for HttpClient::send(HttpRequest*) method.
 Please refer to tests/test-cpp/Classes/ExtensionTest/NetworkTest/HttpClientTest.cpp as a sample
 @since v2.0.2
 */

#if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8) || (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)
#ifdef DELETE
#undef DELETE
#endif
#endif

class HttpRequest : public Ref
{
public:
    /** Use this enum type as param in setReqeustType(param) */
    enum class Type
    {
        GET,
        POST,
        PUT,
        DELETE,
        UNKNOWN,
    };
    
    /** Constructor
        Because HttpRequest object will be used between UI thead and network thread,
        requestObj->autorelease() is forbidden to avoid crashes in AutoreleasePool
        new/retain/release still works, which means you need to release it manually
        Please refer to HttpRequestTest.cpp to find its usage
     */
    HttpRequest()
    {
        _requestType = Type::UNKNOWN;
        _url.clear();
        _requestData.clear();
        _tag.clear();
        _pTarget = nullptr;
        _pSelector = nullptr;
        _pCallback = nullptr;
        _pUserData = nullptr;
    };
    
    /** Destructor */
    virtual ~HttpRequest()
    {
        if (_pTarget)
        {
            _pTarget->release();
        }
    };
    
    /** Override autorelease method to avoid developers to call it */
    Ref* autorelease(void)
    {
        CCASSERT(false, "HttpResponse is used between network thread and ui thread \
                 therefore, autorelease is forbidden here");
        return NULL;
    }
            
    // setter/getters for properties
     
    /** Required field for HttpRequest object before being sent.
        kHttpGet & kHttpPost is currently supported
     */
    inline void setRequestType(Type type)
    {
        _requestType = type;
    };
    /** Get back the kHttpGet/Post/... enum value */
    inline Type getRequestType()
    {
        return _requestType;
    };
    
    /** Required field for HttpRequest object before being sent.
     */
    inline void setUrl(const char* url)
    {
        _url = url;
    };
    /** Get back the setted url */
    inline const char* getUrl()
    {
        return _url.c_str();
    };
    
    /** Option field. You can set your post data here
     */
    inline void setRequestData(const char* buffer, size_t len)
    {
        _requestData.assign(buffer, buffer + len);
    };
    /** Get the request data pointer back */
    inline char* getRequestData()
    {
        if(_requestData.size() != 0)
            return &(_requestData.front());

        return nullptr;
    }
    /** Get the size of request data back */
    inline ssize_t getRequestDataSize()
    {
        return _requestData.size();
    }
    
    /** Option field. You can set a string tag to identify your request, this tag can be found in HttpResponse->getHttpRequest->getTag()
     */
    inline void setTag(const char* tag)
    {
        _tag = tag;
    };
    /** Get the string tag back to identify the request. 
        The best practice is to use it in your MyClass::onMyHttpRequestCompleted(sender, HttpResponse*) callback
     */
    inline const char* getTag()
    {
        return _tag.c_str();
    };
    
    /** Option field. You can attach a customed data in each request, and get it back in response callback.
        But you need to new/delete the data pointer manully
     */
    inline void setUserData(void* pUserData)
    {
        _pUserData = pUserData;
    };
    /** Get the pre-setted custom data pointer back.
        Don't forget to delete it. HttpClient/HttpResponse/HttpRequest will do nothing with this pointer
     */
    inline void* getUserData()
    {
        return _pUserData;
    };
    
    /** Required field. You should set the callback selector function at ack the http request completed
     */
    CC_DEPRECATED_ATTRIBUTE inline void setResponseCallback(Ref* pTarget, SEL_CallFuncND pSelector)
    {
        setResponseCallback(pTarget, (SEL_HttpResponse) pSelector);
    }

    CC_DEPRECATED_ATTRIBUTE inline void setResponseCallback(Ref* pTarget, SEL_HttpResponse pSelector)
    {
        _pTarget = pTarget;
        _pSelector = pSelector;
        
        if (_pTarget)
        {
            _pTarget->retain();
        }
    }
    
    inline void setResponseCallback(const ccHttpRequestCallback& callback)
    {
        _pCallback = callback;
    }
    
    /** Get the target of callback selector funtion, mainly used by HttpClient */
    inline Ref* getTarget()
    {
        return _pTarget;
    }

    /* This sub class is just for migration SEL_CallFuncND to SEL_HttpResponse, 
       someday this way will be removed */
    class _prxy
    {
    public:
        _prxy( SEL_HttpResponse cb ) :_cb(cb) {}
        ~_prxy(){};
        operator SEL_HttpResponse() const { return _cb; }
        CC_DEPRECATED_ATTRIBUTE operator SEL_CallFuncND()   const { return (SEL_CallFuncND) _cb; }
    protected:
        SEL_HttpResponse _cb;
    };
    
    /** Get the selector function pointer, mainly used by HttpClient */
    inline _prxy getSelector()
    {
        return _prxy(_pSelector);
    }
    
    inline const ccHttpRequestCallback& getCallback()
    {
        return _pCallback;
    }
    
    /** Set any custom headers **/
    inline void setHeaders(std::vector<std::string> pHeaders)
   	{
   		_headers=pHeaders;
   	}
   
    /** Get custom headers **/
   	inline std::vector<std::string> getHeaders()
   	{
   		return _headers;
   	}
    
protected:
    // properties
    Type                        _requestType;    /// kHttpRequestGet, kHttpRequestPost or other enums
    std::string                 _url;            /// target url that this request is sent to
    std::vector<char>           _requestData;    /// used for POST
    std::string                 _tag;            /// user defined tag, to identify different requests in response callback
    Ref*                        _pTarget;        /// callback target of pSelector function
    SEL_HttpResponse            _pSelector;      /// callback function, e.g. MyLayer::onHttpResponse(HttpClient *sender, HttpResponse * response)
    ccHttpRequestCallback       _pCallback;      /// C++11 style callbacks
    void*                       _pUserData;      /// You can add your customed data here 
    std::vector<std::string>    _headers;		      /// custom http headers
};

}

NS_CC_END

#endif //__HTTP_REQUEST_H__