简单封装 libcurl
用到的库：
- libcurl（必须）
- boost（非必须）
其中，boost 库用作编码转换（当然了如果你不转换编码我也拦不了你…）
这个样例不仅有 get / post 操作，我还扔进去了
- string转wstring / wstring转string
- urlEncode / urlDecode
- getTimeStamp
- mergeCookies
- findText
头文件（Network.h）：
/* * Network.h * * Created on: 2017年1月19日 * Author: Junyi */
#include 实现（Network.cpp）
/* * Network.cpp * * Created on: 2017年1月19日 * Author: Junyi */
#include if (pos < size)
{
string s = str.substr(i, pos - i);
result.push_back(s);
i = pos + pattern.size() - 1;
}
}
return result;
}
int Network::post(const string url_, const string postData_, const string cookies_, string & cookiesRecv_, curl_slist * headers_, wstring & recvData_)
{
CURL *curl_handle;
CURLcode res;
struct MemoryStruct chunk;
chunk.memory = (char *)malloc(1); /* will be grown as needed by the realloc above */
chunk.size = 0; /* no data at this point */
curl_handle = curl_easy_init();
if(curl_handle)
{
curl_easy_setopt(curl_handle, CURLOPT_URL, url_.c_str());
curl_easy_setopt(curl_handle, CURLOPT_POST, 1L);
curl_easy_setopt(curl_handle, CURLOPT_POSTFIELDS, postData_.c_str());
curl_easy_setopt(curl_handle, CURLOPT_COOKIEFILE, "");/* Start Cookies Engine */
curl_easy_setopt(curl_handle, CURLOPT_COOKIE, cookies_.c_str());
curl_easy_setopt(curl_handle, CURLOPT_HTTPHEADER, headers_);
curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYPEER, false);
curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYHOST, 0);
curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void *)&chunk);
res = curl_easy_perform(curl_handle);
if (res != CURLE_OK) {
curl_easy_cleanup(curl_handle);
free(chunk.memory);
return -1;
}
else
{
string cookiesResult("");
struct curl_slist *cookiesList = NULL;
struct curl_slist *cookiesList_original = NULL; // 保存一个指针副本
curl_easy_getinfo(curl_handle, CURLINFO_COOKIELIST, &cookiesList);
while(cookiesList)
{
vector<string> s = split(cookiesList->data, "\t");
if(s.size() == 7)
{
cookiesResult.append(s[5]);
cookiesResult.append("=");
cookiesResult.append(s[6]);
cookiesResult.append("; ");
}
cookiesList = cookiesList->next;
}
curl_slist_free_all(cookiesList_original); // 注意！！一定要释放 cookiesList_original ！不然会引起内存泄漏
cookiesResult = cookiesResult.substr(0, cookiesResult.size() - 2);
cookiesRecv_ = cookiesResult;
string afterCoding("");
afterCoding = chunk.memory;
afterCoding = boost::locale::conv::from_utf(afterCoding, "GBK");
recvData_ = string2wstring(afterCoding);
}
curl_easy_cleanup(curl_handle);
free(chunk.memory);
return 0;
}
curl_easy_cleanup(curl_handle);
free(chunk.memory);
return -2;
}
int Network::get(const string url_, const string cookies_, string & cookiesRecv_, curl_slist * headers_, wstring & recvData_)
{
CURL *curl_handle;
CURLcode res;
struct MemoryStruct chunk;
chunk.memory = (char *)malloc(1); /* will be grown as needed by the realloc above */
chunk.size = 0; /* no data at this point */
/* init the curl session */
curl_handle = curl_easy_init();
if(curl_handle)
{
curl_easy_setopt(curl_handle, CURLOPT_URL, url_.c_str());
curl_easy_setopt(curl_handle, CURLOPT_COOKIEFILE, "");/* Start Cookies Engine */
curl_easy_setopt(curl_handle, CURLOPT_COOKIE, cookies_.c_str());
curl_easy_setopt(curl_handle, CURLOPT_HTTPHEADER, headers_);
curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYPEER, false);
curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYHOST, 0);
curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void *)&chunk);
res = curl_easy_perform(curl_handle);
if (res != CURLE_OK) {
curl_easy_cleanup(curl_handle);
free(chunk.memory);
return -1;
}
else
{
string cookiesResult("");
struct curl_slist *cookiesList = NULL;
struct curl_slist *cookiesList_original = NULL;
curl_easy_getinfo(curl_handle, CURLINFO_COOKIELIST, &cookiesList);
cookiesList_original = cookiesList;
while(cookiesList)
{
vector<string> s = split(cookiesList->data, "\t");
if(s.size() == 7)
{
cookiesResult.append(s[5]);
cookiesResult.append("=");
cookiesResult.append(s[6]);
cookiesResult.append("; ");
}
cookiesList = cookiesList->next;
}
curl_slist_free_all(cookiesList_original); // 注意！！一定要释放！不然会引起内存泄漏
cookiesResult = cookiesResult.substr(0, cookiesResult.size() - 2);
cookiesRecv_ = cookiesResult;
string afterCoding("");
afterCoding = chunk.memory;
afterCoding = boost::locale::conv::from_utf(afterCoding, "GBK");
recvData_ = string2wstring(afterCoding);
}
curl_easy_cleanup(curl_handle);
free(chunk.memory);
return 0;
}
curl_easy_cleanup(curl_handle);
free(chunk.memory);
return -2;
}
void mapInsert(map<string, string> &m, string first, string second)
{
map<string, string>::iterator it;
it = m.find(first);
if (it == m.end())
m.insert(pair<string, string>(first, second));
else
it->second = second;
}
string Network::mergeCookies(string cookies1, string cookies2)
{
using namespace boost;
map<string, string> m;//result cookies
erase_all(cookies1, " ");
erase_all(cookies2, " ");
vector<string> s1 = split(cookies1, ";");
vector<string> s2 = split(cookies2, ";");
for (vector<string>::iterator it = s1.begin(); it != s1.end(); it++)
{
vector<string> s11 = split((*it), "=");
if (s11.size() != 2)
continue;
mapInsert(m, s11[0], s11[1]);
}
for (vector<string>::iterator it = s2.begin(); it != s2.end(); it++)
{
vector<string> s22 = split((*it), "=");
if (s22.size() != 2)
continue;
mapInsert(m, s22[0], s22[1]);
}
string result("");
for (map<string, string>::iterator it = m.begin(); it != m.end(); it++)
{
result.append(it->first);
result.append("=");
result.append(it->second);
result.append("; ");
}
result = result.substr(0, result.size() - 2);//去掉最后多余的的 [; ]
return result;
}
Network::Network() {
}
Network::~Network() {
}
样例（main.cpp）
#include 编译：
g++ main.cpp Network.cpp Network.h -o main -lcurl -lcurldll -lboost_locale-mgw53-mt-1_62（注意：-lcurldll 和 -lboost_locale-mgw53-mt-1_62 根据个人情况而定！）
（linux下如果安装了 libcurl4-openssl-dev 和 libboost-dev，编译命令为：g++ main.cpp Network.cpp Network.h -o main -lcurl -lboost_locale）
（编译环境：MinGW gcc-5.3.0 在各种库都配置正常的情况下，本篇文章编译通过并能正常使用）
附言：
C++新人一个，如代码有问题欢迎评论指出！