HTTP/HTTPS客户端源码示例
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时间：2015年06月09日
HTTP/HTTPS客户端源码示例
环境: zlib-1.2.8 openssl-1.0.1g curl-7.36
Author: Kagula
LastUpdateDate: 2014-04
阅读前提：CMake工具的基本使用、配置openssl-1.0.1g 开发环境
编译zlib库
下载zlib-1.2.8.tar.gz并解压缩到" D:\SDK\zlib-1.2.8"，使用CMake工具生成zlib.sln，在Visual Studio2013中打开并编译即可。
编译curl-7.36.0
假设Open SSL已经安装到“D:\SDK\openssl-1.0.1g”，先设置下面的环境变量
OPENSSL_LIBRARIES=D:\SDK\openssl-1.0.1g\out32
OPENSSL_ROOT_DIR=D:\SDK\openssl-1.0.1g
从http://curl.haxx.se/下载curl-7.36.0.zip并解压缩到“D:\SDK\curl-7.36.0”启动CMake工具Configure，分别设置LIB_EAY_RELEASE和SSL_EAY_RELEASE变量为“D:\SDK\openssl-1.0.1g\out32\libeay32.lib”，“D:\SDK\openssl-1.0.1g\out32\ssleay32.lib”,产生sln文件后打开，为里面的curl工程项目添加“USE_MANUAL”宏定义，然后build里面的4个项目成功。
为项目添加链接库libcurl_imp.lib ， 把libcurl.dll文件复制到C++项目路径下，否则程序运行会提示找不到动态链接库。
下面是HTTP/HTTPS客户端示例
Source.cpp如何调用的示例
#include <iostream>
using namespace std;
#include "HttpClient.h"
//下面是测试代码
using namespace kagula::network;
void TestHttpClient()
{
CHttpClient client;
string url;
string post;
string cookie="d:\\temp\\temp.txt";
string response;
url = "http://www.mydrivers.com";
client.Get(url, response);
cout << response << endl;;
client.Post(url,post,cookie,response);
cout << response << endl;
url = "https://www.google.com.hk/";
client.GetS(url, response, NULL);
cout << response << endl;
client.PostS(url, post, cookie, response, NULL);
cout << response << endl;
}
int main(int argc, char *argv[])
{
TestHttpClient();
return 0;
}
HttpClient.h封装好的头文件
//HttpClient.h源代码清单
#ifndef _HTTPCLIENT_H_
#define _HTTPCLIENT_H_
#include <string>
/*
标题：从HTTP/HTTPS服务器中获取页面
测试环境：Windows 8.1
Visual Studio 2013 SP1
libcurl 7.36.0
说明：转自csdn某个页面，对源代码做了小修改，添加了Cookie的支持
参考资料：
《curl_eay_setopt手册》
http://www.helplib.net/s/linux.die/65_2740/man-3-curl-easy-setopt.shtml
《C++的cout高阶格式化操作》
http://www.cnblogs.com/devymex/archive/2010/09/06/1818754.html
*/
namespace kagula
{
namespace network
{
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 strCookie 输入参数,Cookie文件名，例如 d:\temp\cookie.txt
* 如果为空，不启用Cookie.
* @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,
const std::string& strCookie, 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 strCookie 输入参数,Cookie文件名，例如 d:\temp\cookie.txt
* 如果为空，不启用Cookie.
* @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, const std::string& strCookie,
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;
bool PrintCookies(void* curl,std::string& strOut);
};
}
}
#endifHttpClient.cpp
//HttpClient.cpp源代码清单
#include "HttpClient.h"
#include <iostream>
#include <curl/curl.h>
#include <iomanip>
#include <sstream>
namespace kagula
{
namespace network
{
CHttpClient::CHttpClient(void) :
m_bDebug(false)
{
}
CHttpClient::~CHttpClient(void)
{
}
bool CHttpClient::PrintCookies(void* curl, std::string& strOut)
{
std::ostringstream ostr;
CURLcode res;
struct curl_slist *cookies;
res = curl_easy_getinfo(curl, CURLINFO_COOKIELIST, &cookies);
if (res != CURLE_OK) {
ostr << "Curl curl_easy_getinfo failed:" << curl_easy_strerror(res) << std::endl;
strOut = ostr.str();
return false;
}
const struct curl_slist *nc = cookies;
int i = 1;
ostr << "Cookies, curl knows:" << std::endl;
while (nc) {
ostr << "[" << i++ << "]: " << nc->data << std::endl;
nc = nc->next;
}
return true;
}
static int OnDebug(CURL *, curl_infotype itype, char * pData, size_t size, void *)
{
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_OUT]%s\n", pData);
}
else if (itype == CURLINFO_DATA_IN)
{
printf("[DATA_IN]%s\n", pData);
}
else if (itype == CURLINFO_DATA_OUT)
{
printf("[DATA_OUT]%s\n", pData);
}
return 0;
}
static size_t OnWriteData(void* buffer, size_t size, size_t nmemb, void* lpVoid)
{
std::string* str = reinterpret_cast<std::string*>(lpVoid);
if (NULL == str || NULL == buffer)
{
return -1;
}
char* pData = reinterpret_cast<char*>(buffer);
str->append(pData, size * nmemb);
return nmemb;
}
int CHttpClient::Post(const std::string& strUrl, const std::string& strPost, const std::string& strCookie,
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);
if (strCookie.length()>0)
{
curl_easy_setopt(curl, CURLOPT_COOKIEFILE, (void *)&strCookie);
curl_easy_setopt(curl, CURLOPT_COOKIEJAR, (void *)&strCookie);
}
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, const std::string& strCookie,
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 (strCookie.length()>0)
{
curl_easy_setopt(curl, CURLOPT_COOKIEFILE, (void *)&strCookie);
curl_easy_setopt(curl, CURLOPT_COOKIEJAR, (void *)&strCookie);
}
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;
}
}
}
补充阅读资料
使用libcurl实现上传文件到FTP服务器
http://blog.csdn.net/lee353086/article/details/5823145
使用libcurl下载http://www.baidu.com/img/baidu.gif示例
http://www.cppblog.com/qiujian5628/archive/2008/06/28/54873.html
libcurl的使用总结（一）
http://www.vimer.cn/2010/03/libcurl%E7%9A%84%E4%BD%BF%E7%94%A8%E6%80%BB%E7%BB%93%EF%BC%88%E4%B8%80%EF%BC%89.html
PHP的curl实现get，post 和 cookie
http://www.tsingpost.com/articles/201403/525.html
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