Http/https Client Source Sample

Http/https Client Source Sample

Environment: zlib-1.2.8 openssl-1.0.1g curl-7.36

Author: Kagula

lastupdatedate: 2014-04

Read the Prerequisites: Basic use and configuration of CMake tools OPENSSL-1.0.1G development environment

Compiling the Zlib library

Download zlib-1.2.8.tar.gz and unzip to "D:\SDK\zlib-1.2.8", use the CMake tool to generate the Zlib.sln, open and compile in visual Studio2013.

Compiling curl-7.36.0

Assuming that open SSL is already installed to "D:\SDK\openssl-1.0.1g", set the following environment variables first

openssl_libraries=d:\sdk\openssl-1.0.1g\out32

Openssl_root_dir=d:\sdk\openssl-1.0.1g

Download Curl-7.36.0.zip from http://curl.haxx.se/and unzip to "D:\SDK\curl-7.36.0" launch CMake tool configure, set lib_eay_release separately And the ssl_eay_release variable is "D:\SDK\openssl-1.0.1g\out32\libeay32.lib", "D:\SDK\openssl-1.0.1g\out32\ Ssleay32.lib ", generate the SLn file after opening, add"use_manual"macro definition for the Curl project inside, then build the 4 projects inside the success.

Add the link library libcurl_imp.lib to the project, copy the Libcurl.dll file to the C + + project path, or the program will run without prompting for a dynamic-link library.

The following is an example of the Http/https client

Source.cpp How to invoke an example

#include <iostream>using namespace std; #include "HttpClient.h"//The following is the test code 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 "; the 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 Packaged header File

HttpClient.h Source Code Listing #ifndef _httpclient_h_#define _httpclient_h_#include <string>/* title: From http/ Get page test environment in HTTPS server: Windows 8.1Visual Studio sp1libcurl 7.36.0 Description: Go from csdn to a page, make minor changes to the source code, add a cookie support reference: Curl_eay _setopt manual http://www.helplib.net/s/linux.die/65_2740/man-3-curl-easy-setopt.shtml "C + + cout high-order format operation" http:/ Www.cnblogs.com/devymex/archive/2010/09/06/1818754.html*/namespace kagula{namespace Network{class CHttpClient{ Public:chttpclient (void); ~chttpclient (void);p ublic:/*** @brief HTTP POST request * @param strurl input parameter, requested URL address, e.g. http:// www.baidu.com* @param strpost input parameters, use the following format para1=val1¶2=val2&...* @param strcookie input parameters, cookie file names, such as D:\temp\ cookie.txt* if the cookie.* @param strresponse output parameter is not enabled, the returned contents * @return returns whether Post succeeded */int Post (const ST D::string & strURL, const std::string & strpost, const std::string& Strcookie, std::string & Strresponse); /*** @brief HTTP GET request * @param strurl input parameter, requested URL address, such as: http://www.baidu.com* @param strresponse output parameter, contents returned *@return Returns whether Post succeeded */int Get (const std::string & strURL, std::string & strresponse),/*** @brief HTTPS POST request, no certificate version * @param strurl input parameters, requested URL address, such as: https://www.alipay.com* @param strpost input parameters, use the following format para1=val1¶2=val2&...* @param Strcookie input parameter, cookie file name, such as d:\temp\cookie.txt* if blank, do not enable cookie.* @param strresponse output parameter, return content * @ param the Pcapath input parameter, the path to the CA certificate. If the input is null, the validity of the server-side certificate is not verified. * @return Returns whether Post succeeded */int PostS (const std::string & strURL, Const std::string & strpost, const std::string& Strcookie, std::string & strresponse, const char * Pcapath = N ULL);/*** @brief HTTPS GET request, no certificate version * @param strurl input parameters, requested URL address, such as: https://www.alipay.com* @param strresponse output parameters, returned content * @param the Pcapath input parameter, the path to the CA certificate. If the input is null, the validity of the server-side certificate is not verified. * @return Returns whether Post succeeded */int GetS (const std::string & strURL, Std::string & strresponse, const char * pcapath = NULL);p ublic:void setdebug (bool bdebug);p Rivate:bool m_bdebug;bool P Rintcookies (void* curl,std::string& StroUT);};} #endif

HttpClient.cpp

HttpClient.cpp source code listing 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::P rintcookies (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 = OS Tr.str (); return false;} const struct Curl_slist *nc = cookies;int i = 1;ostr << "Cookies, Curl knows:" << Std::endl;while (NC) {OSTR & lt;< "[" << 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<st D::string*> (LPVOID); if (NULL = = STR | | NULL = = buffer) {return-1;} char* pData = reinterpret_cast<char*> (buffer); Str->append (pData, size * nmemb); return nmemb;} int chttpclient::P ost (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)/*** When multiple threads are using time-out processing, there is a sleep or wait operation in the main thread. * If this option is not set, Libcurl will send a signal to interrupt the wait and cause the program to exit. */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::P osts (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);} The else{//default is PEM, so no setup is required, additional support is 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;}}}

Supplementary reading materials

Uploading files to an FTP server using the Libcurl implementation

http://blog.csdn.net/lee353086/article/details/5823145

Download the Http://www.baidu.com/img/baidu.gif sample using Libcurl

Http://www.cppblog.com/qiujian5628/archive/2008/06/28/54873.html

Summary of the use of Libcurl (i)

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's curl implements Get,post and cookies

Http://www.tsingpost.com/articles/201403/525.html

Http/https Client Source Sample