cocos2d-x中使用Http
一、如何使用
//发送接口 void CmdHelper::postRequest(const char* cmdTag, const char* url, const char* postData, size_t postDataLengt) { CCHttpRequest* request = new CCHttpRequest(); request->setTag(cmdTag); request->setUrl(url); request->setResponseCallback(this, httpresponse_selector(CmdHelper::onRequestRsp)); //set request type: get/post/put/delete request->setRequestType(CCHttpRequest::kHttpPost); //set header std::vector<std::string> headers; headers.push_back("Content-Type: application/json; charset=utf-8"); request->setHeaders(headers); //set body data, POST only request->setRequestData(postData, postDataLengt); //set time out CCHttpClient::getInstance()->setTimeoutForConnect(TIMEOUT_CONNECT); CCHttpClient::getInstance()->setTimeoutForRead(TIMEOUT_READ); CCHttpClient::getInstance()->send(request); // don‘t forget to release it, pair to new request->release(); } #define CMD_DOWNLOAD "CMD_DOWNLOAD" #define URL_DOWNLOAD "http://192.168.2.122:9001/star/downsolution" std::string data = ""; //发送post请求时,调用如下接口即可 postRequest(CMD_DOWNLOAD, URL_DOWNLOAD, data.c_str(), data.length()); //接收回调 void CmdHelper::onRequestRsp(CCHttpClient* client, CCHttpResponse* response) { if (!response) { CCLOG("ERROR: %s ---> null response", __FUNCTION__); return; } std::string tag = response->getHttpRequest()->getTag(); int statusCode = response->getResponseCode(); CCLOG("%s ---> response code: %d, tag = %s", __FUNCTION__, statusCode, tag.c_str()); std::string dataBody; if (!response->isSucceed()) { CCLOG("response failed"); CCLOG("error buffer: %s", response->getErrorBuffer()); //this->setLastNetworkError(response->getErrorBuffer()); } else { // dump data std::vector<char> *buffer = response->getResponseData(); dataBody.assign(buffer->begin(), buffer->end()); //CCLOG("%s", dataBody.c_str()); } //dispatch if (CMD_DOWNLOAD == tag) { this->onDownloadTaskSolutionRsp(dataBody.c_str(), dataBody.size()); } else { CCLOG("%s ---> error branch, cmd tag = %d", __FUNCTION__, tag.c_str()); } }
二、遇到的坑
1. 注意传输的编码格式
如上示例中,我们使用的utf-8编码,但是在http传输二进制数据的时候,服务器收到的数据变大了,所以要么改传输的编码格式,要么把本地要传输的二进制数据转码(比如我们用的base64)。
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