https://blog.csdn.net/bingqingsuimeng/article/details/51364824
linux:
./configure --prefix=/root/work/code/curl-7.61.1/curl_linux --disable-shared --enable-static --without-libidn --without-ssl --without-librtmp --without-gnutls --without-nss --without-libssh2 --without-zlib --without-winidn --disable-rtsp --disable-ldap --disable-ldaps --disable-ipv6
arm:
./configure --host=arm-hisiv300-linux --prefix=/root/work/code/curl-7.61.1/curl_arm CC=arm-hisiv300-linux-gcc --disable-shared --enable-static --without-libidn --without-ssl --without-librtmp --without-gnutls --without-nss --without-libssh2 --without-zlib --without-winidn --disable-rtsp --disable-ldap --disable-ldaps --disable-ipv6
本文提供最简单的demo使用libcurl开发HttpClient。主要包括同步的HTTP GET、HTTP POST、HTTPS GET、HTTPS POST。
#ifndef __HTTP_CURL_H__
#define __HTTP_CURL_H__
#include
class CHttpClient
{
public:
CHttpClient(void);
~CHttpClient(void);
public:
/**
* @brief HTTP POST请求
* @param strUrl 输入参数,请求的Url地址,如:http://www.baidu.com
* @param strPost 输入参数,使用如下格式para1=val1¶2=val2&…
* @param strResponse 输出参数,返回的内容
* @return 返回是否Post成功
*/
int Post(const std::string & strUrl, const std::string & strPost, std::string & strResponse);
/**
* @brief HTTP GET请求
* @param strUrl 输入参数,请求的Url地址,如:http://www.baidu.com
* @param strResponse 输出参数,返回的内容
* @return 返回是否Post成功
*/
int Get(const std::string & strUrl, std::string & strResponse);
/**
* @brief HTTPS POST请求,无证书版本
* @param strUrl 输入参数,请求的Url地址,如:https://www.alipay.com
* @param strPost 输入参数,使用如下格式para1=val1¶2=val2&…
* @param strResponse 输出参数,返回的内容
* @param pCaPath 输入参数,为CA证书的路径.如果输入为NULL,则不验证服务器端证书的有效性.
* @return 返回是否Post成功
*/
int Posts(const std::string & strUrl, const std::string & strPost, std::string & strResponse, const char * pCaPath = NULL);
/**
* @brief HTTPS GET请求,无证书版本
* @param strUrl 输入参数,请求的Url地址,如:https://www.alipay.com
* @param strResponse 输出参数,返回的内容
* @param pCaPath 输入参数,为CA证书的路径.如果输入为NULL,则不验证服务器端证书的有效性.
* @return 返回是否Post成功
*/
int Gets(const std::string & strUrl, std::string & strResponse, const char * pCaPath = NULL);
public:
void SetDebug(bool bDebug);
private:
bool m_bDebug;
};
#endif
#include "httpclient.h"
#include "curl/curl.h"
#include
CHttpClient::CHttpClient(void) :
m_bDebug(false)
{
}
CHttpClient::~CHttpClient(void)
{
}
static int OnDebug(CURL *, curl_infotype itype, char * pData, size_t size, void *)
{
if(itype == CURLINFO_TEXT)
{
//printf("[TEXT]%s
", pData);
}
else if(itype == CURLINFO_HEADER_IN)
{
printf("[HEADER_IN]%s
", pData);
}
else if(itype == CURLINFO_HEADER_OUT)
{
printf("[HEADER_OUT]%s
", pData);
}
else if(itype == CURLINFO_DATA_IN)
{
printf("[DATA_IN]%s
", pData);
}
else if(itype == CURLINFO_DATA_OUT)
{
printf("[DATA_OUT]%s
", pData);
}
return 0;
}
static size_t OnWriteData(void* buffer, size_t size, size_t nmemb, void* lpVoid)
{
std::string* str = dynamic_cast((std::string *)lpVoid);
if( NULL == str || NULL == buffer )
{
return -1;
}
char* pData = (char*)buffer;
str->append(pData, size * nmemb);
return nmemb;
}
int CHttpClient::Post(const std::string & strUrl, const std::string & strPost, std::string & strResponse)
{
CURLcode res;
CURL* curl = curl_easy_init();
if(NULL == curl)
{
return CURLE_FAILED_INIT;
}
if(m_bDebug)
{
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, OnDebug);
}
curl_easy_setopt(curl, CURLOPT_URL, strUrl.c_str());
curl_easy_setopt(curl, CURLOPT_POST, 1);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, strPost.c_str());
curl_easy_setopt(curl, CURLOPT_READFUNCTION, NULL);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, OnWriteData);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&strResponse);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 3);
curl_easy_setopt(curl, CURLOPT_TIMEOUT, 3);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
return res;
}
int CHttpClient::Get(const std::string & strUrl, std::string & strResponse)
{
CURLcode res;
CURL* curl = curl_easy_init();
if(NULL == curl)
{
return CURLE_FAILED_INIT;
}
if(m_bDebug)
{
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, OnDebug);
}
curl_easy_setopt(curl, CURLOPT_URL, strUrl.c_str());
curl_easy_setopt(curl, CURLOPT_READFUNCTION, NULL);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, OnWriteData);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&strResponse);
/**
* 当多个线程都使用超时处理的时候，同时主线程中有sleep或是wait等操作。
* 如果不设置这个选项，libcurl将会发信号打断这个wait从而导致程序退出。
*/
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 3);
curl_easy_setopt(curl, CURLOPT_TIMEOUT, 3);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
return res;
}
int CHttpClient::Posts(const std::string & strUrl, const std::string & strPost, std::string & strResponse, const char * pCaPath)
{
CURLcode res;
CURL* curl = curl_easy_init();
if(NULL == curl)
{
return CURLE_FAILED_INIT;
}
if(m_bDebug)
{
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, OnDebug);
}
curl_easy_setopt(curl, CURLOPT_URL, strUrl.c_str());
curl_easy_setopt(curl, CURLOPT_POST, 1);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, strPost.c_str());
curl_easy_setopt(curl, CURLOPT_READFUNCTION, NULL);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, OnWriteData);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&strResponse);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
if(NULL == pCaPath)
{
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, false);
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, false);
}
else
{
//缺省情况就是PEM，所以无需设置，另外支持DER
//curl_easy_setopt(curl,CURLOPT_SSLCERTTYPE,"PEM");
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, true);
curl_easy_setopt(curl, CURLOPT_CAINFO, pCaPath);
}
curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 3);
curl_easy_setopt(curl, CURLOPT_TIMEOUT, 3);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
return res;
}
int CHttpClient::Gets(const std::string & strUrl, std::string & strResponse, const char * pCaPath)
{
CURLcode res;
CURL* curl = curl_easy_init();
if(NULL == curl)
{
return CURLE_FAILED_INIT;
}
if(m_bDebug)
{
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, OnDebug);
}
curl_easy_setopt(curl, CURLOPT_URL, strUrl.c_str());
curl_easy_setopt(curl, CURLOPT_READFUNCTION, NULL);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, OnWriteData);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&strResponse);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
if(NULL == pCaPath)
{
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, false);
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, false);
}
else
{
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, true);
curl_easy_setopt(curl, CURLOPT_CAINFO, pCaPath);
}
curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 3);
curl_easy_setopt(curl, CURLOPT_TIMEOUT, 3);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
return res;
}
///////////////////////////////////////////////////////////////////////////////////////////////
void CHttpClient::SetDebug(bool bDebug)
{
m_bDebug = bDebug;
}
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