c++ curl下载和上传数据——c++(学习一)

首先必须感谢稀泥蟹大神的这篇文章。还有官网让我学习和使用了curl这个库。具体的curl的详解，请前往那里观看。我这里就是用c++封装了一下。还有说明一下，我这个是用在我的cocos2dx游戏里的。所以如果单独拿出来有问题的话还望指出，OK，直接上干货吧！随便提一下，使用它的时候应该开个线程。不然会一直阻塞在那里！！

//.hpp#ifndef FCFTestNetWorkManager_hpp#define FCFTestNetWorkManager_hpp#include <stdio.h>#include "curl.h"#include <string.h>using namespace std;typedef std::function<void (string & response)>SuccessFinishedCallBack;//请求成功,有数据返回class FCFTestNetWorkManager{public:    //使用单例    static FCFTestNetWorkManager* getInstance();    //使用get方法    int  GetHttpRequest(const string & strUrl,SuccessFinishedCallBack callback);    //使用post方法    int  PostHttpRequest(const string & strUrl,const string & filePath,map<string,string>params,SuccessFinishedCallBack callback);public:    //设置回调    void setSuccesseCallBack(SuccessFinishedCallBack callBack);    //设置m_debug    void setDebug(bool debug);    //返回的数据处理    static size_t write_data(void * buffer,size_t size, size_t nmenb,void * lpvoid);    //debug    static int onDebug(CURL * curl,curl_infotype itype,char * pData,size_t size,void * lpvoid);    //进度    static int updateProgress(void* ptr,double rDlTotal,double rDlNow,double rUlTotal,double rUlNow);private:    static FCFTestNetWorkManager * __instance;    FCFTestNetWorkManager();    ~FCFTestNetWorkManager();    bool m_debug;    SuccessFinishedCallBack SuccessCallBack;};#endif /* FCFTestNetWorkManager_hpp */

.cpp#include "FCFTestNetWorkManager.hpp"FCFTestNetWorkManager* FCFTestNetWorkManager::__instance = NULL;FCFTestNetWorkManager* FCFTestNetWorkManager::getInstance(){    if (NULL == __instance) {        __instance = new FCFTestNetWorkManager();    }    return __instance;}FCFTestNetWorkManager::FCFTestNetWorkManager():m_debug(false),SuccessCallBack(nullptr){}FCFTestNetWorkManager::~FCFTestNetWorkManager(){}void FCFTestNetWorkManager::setSuccesseCallBack(SuccessFinishedCallBack callBack){    SuccessCallBack = callBack;}void FCFTestNetWorkManager::setDebug(bool debug){    m_debug = debug;}int FCFTestNetWorkManager::onDebug(CURL * curl,curl_infotype itype,char * pData,size_t size,void * lpvoid){    if (itype == CURLINFO_TEXT) {        printf("[text] %s\n",pData);    }else if(itype == CURLINFO_HEADER_IN){        printf("[HEADER_IN] %s\n",pData);    }else if(itype == CURLINFO_HEADER_OUT){        printf("[HEADER_IN] %s\n",pData);    }else if(itype == CURLINFO_DATA_IN){        printf("[HEADER_IN] %s\n",pData);    }else if(itype == CURLINFO_DATA_OUT){        printf("[HEADER_IN] %s\n",pData);    }    return (int)itype;}size_t FCFTestNetWorkManager::write_data(void * buffer,size_t size, size_t nmenb,void * lpvoid){    string * str = dynamic_cast<string *>((string*)lpvoid);    if (NULL == str || NULL == buffer) {        return -1;    }    char * pData = (char *)buffer;    str->append(pData,size*nmenb);    return nmenb;}int FCFTestNetWorkManager::updateProgress(void* ptr,double rDlTotal,double rDlNow,double rUlTotal,double rUlNow){    CCLOG("进度%f",rUlNow);    return 0;}//get请求int FCFTestNetWorkManager::GetHttpRequest(const string & strUrl,SuccessFinishedCallBack callback){    string strResponse;//返回数据    CURL * curl;    CURLcode res;    curl_global_init(CURL_GLOBAL_DEFAULT);//    curl = curl_easy_init();//初始化句柄    if (NULL == curl) {        return CURLE_FAILED_INIT;    }    if(m_debug){        curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);//这个CURLOPT_VERBOSE设为1，将显示出所有发送的实体协议的细节        curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, onDebug);//这里将调用onDebug调试所有信息    }    curl_easy_setopt(curl,CURLOPT_URL,strUrl.c_str());//设置url    curl_easy_setopt(curl,CURLOPT_WRITEFUNCTION,write_data);//调用处理函数    curl_easy_setopt(curl,CURLOPT_WRITEDATA, (void *)&strResponse);//返回的数据，这里可以加个函数指针    curl_easy_setopt(curl,CURLOPT_CONNECTTIMEOUT, 3);//设置链接时长    res = curl_easy_perform(curl);//开始下载    if (res == CURLE_OK) {        callback(strResponse);    }    curl_global_cleanup();    curl_easy_cleanup(curl);//    return res;}//post请求int  FCFTestNetWorkManager::PostHttpRequest(const string & strUrl,const string & filePath,map<string,string>params,SuccessFinishedCallBack callback){    string strResponse;//返回数据    int progress;    CURL * curl;    CURLcode res;    struct curl_httppost * post = NULL;    struct curl_httppost * last = NULL;    struct curl_slist * headers = NULL;    static const char buf[] = "Expect:";    //配置上传文件的表单    if (!filePath.empty()) {        curl_formadd(&post,&last,                     CURLFORM_COPYNAME,"pic",                     CURLFORM_FILE,filePath.c_str(),                     CURLFORM_CONTENTTYPE,"image/jpeg",                     CURLFORM_END);    }    //配置参数    for (auto iter = params.begin(); iter != params.end(); iter++) {        curl_formadd(&post, &last,                     CURLFORM_COPYNAME,iter->first.c_str(),                     CURLFORM_COPYCONTENTS,iter->second.c_str(),                     CURLFORM_END);    }    //    curl = curl_easy_init();//初始化句柄    if (NULL == curl) {        return CURLE_FAILED_INIT;    }    if(m_debug){        curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);//这个CURLOPT_VERBOSE设为1，将显示出所有发送的实体协议的细节        curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, onDebug);//这里将调用onDebug调试所有信息    }    headers = curl_slist_append(headers, buf);//    curl_easy_setopt(curl, CURLOPT_POST, 1);    curl_easy_setopt(curl, CURLOPT_URL, strUrl.c_str());    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);    curl_easy_setopt(curl, CURLOPT_HTTPPOST,post);//表单    curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*)&strResponse);    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION,write_data);    curl_easy_setopt(curl, CURLOPT_NOPROGRESS,false);//是否需要进度    curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, updateProgress);//进度函数    curl_easy_setopt(curl, CURLOPT_PROGRESSDATA,progress);//进度数据    curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT,5);//连接时间    res = curl_easy_perform(curl);    if (res == CURLE_OK) {        callback(strResponse);    }    curl_global_cleanup();    curl_easy_cleanup(curl);    curl_formfree(post);    curl_slist_free_all(headers);    return res;}

//使用getFCFTestNetWorkManager::getInstance()->GetHttpRequest(requestUrl, [](string & response){        log("%s",response.c_str());});//使用postFCFTestNetWorkManager::getInstance()->PostHttpRequest(requestUrl, getImgPath(), params, [](string & response){        log("%s",response.c_str());});