C/C++实现发送与接收HTTP/S请求的示例代码

BOOL InternetCrackUrl(
  _In_  PCTSTR lpszUrl,
  _In_  DWORD   dwUrlLength,
  _In_  DWORD   dwFlags,
  _Out_ LPURL_COMPONENTS lpUrlComponents
);

typedef struct _URL_COMPONENTS {
  DWORD dwStructSize;
  LPTSTR lpszScheme;
  DWORD dwSchemeLength;
  INTERNET_SCHEME nScheme;
  LPTSTR lpszHostName;
  DWORD dwHostNameLength;
  INTERNET_PORT nPort;
  LPTSTR lpszUserName;
  DWORD dwUserNameLength;
  LPTSTR lpszPassword;
  DWORD dwPasswordLength;
  LPTSTR lpszUrlPath;
  DWORD dwUrlPathLength;
  LPTSTR lpszExtraInfo;
  DWORD dwExtraInfoLength;
} URL_COMPONENTS, *LPURL_COMPONENTS;

#define _CRT_SECURE_NO_WARNINGS
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <WinSock2.h>
#include <Windows.h>
#include <string>
#include <WinInet.h>

#pragma comment(lib, "WinInet.lib")
#pragma comment(lib,"ws2_32")

using namespace std;

// 通过InternetCrackUrl函数实现切割
BOOL HttpUrlSplitA(const char* URL, LPSTR pszHostName, LPSTR pszUrlPath)
{
	BOOL bRet = FALSE;
	URL_COMPONENTS url_info = { 0 };
	RtlZeroMemory(&url_info, sizeof(url_info));

	url_info.dwStructSize = sizeof(url_info);

	url_info.dwHostNameLength = MAX_PATH - 1;
	url_info.lpszHostName = pszHostName;

	url_info.dwUrlPathLength = MAX_PATH - 1;
	url_info.lpszUrlPath = pszUrlPath;

	bRet = InternetCrackUrl(URL, 0, 0, &url_info);
	if (FALSE == bRet)
	{
		return FALSE;
	}
	return TRUE;
}

int main(int argc, char* argv[])
{
	char szHostName[1024] = { 0 };
	char szUrlPath[1024] = { 0 };

	BOOL flag = HttpUrlSplitA("http://www.xxx.com/index.html", szHostName, szUrlPath);

	if (flag == TRUE)
	{
		printf("输出主路径：%s \n", szHostName);
		printf("输出子路径：%s \n", szUrlPath);
	}

	system("pause");
	return 0;
}

#define _CRT_SECURE_NO_WARNINGS
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <WinSock2.h>
#include <Windows.h>
#include <string>
#include <WinInet.h>

#pragma comment(lib, "WinInet.lib")
#pragma comment(lib,"ws2_32")

using namespace std;

// 自己实现对URL路径的拆分
bool HttpUrlSplitB(const char* pszUrl)
{
	char szHost[256] = { 0 };
	char* ptr = (char*)pszUrl;

	// 判断开头是否为http:// 或者 https:// 如果不是则返回-1
	if (_strnicmp(ptr, "http://", 7) == 0)
	{
		ptr = ptr + 7;
	}
	else if (_strnicmp(ptr, "https://", 8) == 0)
	{
		ptr = ptr + 8;
	}
	else
	{
		return false;
	}

	int index = 0;
	while (index < 255 && *ptr && *ptr != '/')
	{
		szHost[index++] = *ptr++;
	}
	szHost[index] = '\0';
	printf("主域名: %s \n 路径: %s \n", szHost, ptr);
	return true;
}

int main(int argc, char* argv[])
{
	BOOL flag = HttpUrlSplitB("http://www.xxx.com/index.html");

	system("pause");
	return 0;
}

HeaderName: HeaderValue

int ret = sprintf(context,
	"GET %s HTTP/1.1 \r\n"
	"Host: %s \r\n"
	"User-Agent: Mozilla/5.0 (Windows NT 10.0) LyShark HttpGet 1.0 \r\n"
	"Accept-Type: */* \r\n"
	"Connection: Close \r\n\r\n",
	szSubPath, szURL);

#define _CRT_SECURE_NO_WARNINGS
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <WinSock2.h>
#include <Windows.h>
#include <string>
#include <WinInet.h>

#pragma comment(lib, "WinInet.lib")
#pragma comment(lib,"ws2_32")

using namespace std;

// 通过InternetCrackUrl函数实现切割
BOOL HttpUrlSplitA(const char* URL, LPSTR pszHostName, LPSTR pszUrlPath)
{
	BOOL bRet = FALSE;
	URL_COMPONENTS url_info = { 0 };
	RtlZeroMemory(&url_info, sizeof(url_info));

	url_info.dwStructSize = sizeof(url_info);

	url_info.dwHostNameLength = MAX_PATH - 1;
	url_info.lpszHostName = pszHostName;

	url_info.dwUrlPathLength = MAX_PATH - 1;
	url_info.lpszUrlPath = pszUrlPath;

	bRet = InternetCrackUrl(URL, 0, 0, &url_info);
	if (FALSE == bRet)
	{
		return FALSE;
	}
	return TRUE;
}

// Get方式访问页面
char* Curl(const char* szURL, const char* szSubPath, const int port)
{
	WSADATA wsaData;
	WSAStartup(0x0202, &wsaData);

	char* context = new char[1024 * 8];
	int ret = sprintf(context,
		"GET %s HTTP/1.1 \r\n"
		"Host: %s \r\n"
		"User-Agent: Mozilla/5.0 (Windows NT 10.0) LyShark HttpGet 1.0 \r\n"
		"Accept-Type: */* \r\n"
		"Connection: Close \r\n\r\n",
		szSubPath, szURL);

	SOCKADDR_IN addr;
	SOCKET sock = socket(AF_INET, SOCK_STREAM, 0);
	addr.sin_addr.S_un.S_addr = 0;
	addr.sin_port = htons(0);
	addr.sin_family = AF_INET;

	ret = bind(sock, (const sockaddr*)&addr, sizeof(SOCKADDR_IN));
	hostent* local_addr = gethostbyname(szURL);

	if (local_addr)
	{
		ULONG ip = *(ULONG*)local_addr->h_addr_list[0];
		addr.sin_addr.S_un.S_addr = ip;
		addr.sin_port = htons(port);

		ret = connect(sock, (const sockaddr*)&addr, sizeof(SOCKADDR_IN));
		if (ret == NOERROR)
		{
			ret = send(sock, (const char*)context, (int)strlen(context), 0);
			do
			{
				ret = recv(sock, context, 8191, 0);
				if (ret <= 0)
				{
					break;
				}
				context[ret] = '\0';
				printf("\n%s\n\n", context);
			} while (TRUE);
		}
	}
	closesocket(sock);
	WSACleanup();
	return context;
}

// 访问指定页面
char* HttpGet(const char* szURL, const int port)
{
	char master_url[1024] = { 0 };
	char slave_url[1024] = { 0 };
	char* curl_context = nullptr;

	// 将完整路径切割为主路径与次路径
	BOOL ref = HttpUrlSplitA(szURL, master_url, slave_url);
	if (TRUE == ref)
	{
		// 获取所有网页内容
		curl_context = Curl(master_url, slave_url, port);
		return curl_context;
	}
	return 0;
}

int main(int argc, char* argv[])
{
	char *szBuffer = HttpGet("http://www.lyshark.com/index.html", 80);

	// printf("%s \n", szBuffer);
	
	system("pause");
	return 0;
}

#define _CRT_SECURE_NO_WARNINGS
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <iostream>
#include <WinSock2.h>
#include <openssl/ssl.h>

#pragma comment(lib,"ws2_32.lib")
#pragma comment(lib,"libssl.lib")
#pragma comment(lib,"libcrypto.lib")

using namespace std;

const wchar_t* GetWC(const char* c)
{
	const size_t cSize = strlen(c) + 1;
	wchar_t* wc = new wchar_t[cSize];
	mbstowcs(wc, c, cSize);
	return wc;
}

int main(int argc, char* argv[])
{
	WSADATA WSAData;
	SOCKET sock;
	struct sockaddr_in ClientAddr;

	if (WSAStartup(MAKEWORD(2, 0), &WSAData) != SOCKET_ERROR)
	{
		ClientAddr.sin_family = AF_INET;
		ClientAddr.sin_port = htons(443);
		ClientAddr.sin_addr.s_addr = inet_addr("202.89.233.101");

		sock = socket(AF_INET, SOCK_STREAM, 0);
		int Ret = connect(sock, (LPSOCKADDR)&ClientAddr, sizeof(ClientAddr));
		if (Ret == 0)
		{
		}
	}

	// 初始化OpenSSL库 创建SSL会话环境等
	SSL_CTX* pctxSSL = SSL_CTX_new(TLSv1_2_client_method());
	if (pctxSSL == NULL)
	{
		return -1;
	}
	SSL* psslSSL = SSL_new(pctxSSL);
	if (psslSSL == NULL)
	{
		return -1;
	}
	SSL_set_fd(psslSSL, sock);
	INT iErrorConnect = SSL_connect(psslSSL);
	if (iErrorConnect < 0)
	{
		return -1;
	}
	std::wcout << "SLL ID: " << SSL_get_cipher(psslSSL) << std::endl;

	// 发包
	std::string strWrite =
		"GET https://cn.bing.com/ HTTP/1.1\r\n"
		"Host: cn.bing.com\r\n"
		"User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:74.0) Gecko/20100101 Firefox/74.0 \r\n"
		"Accept-Type: */* \r\n"
		"Connection: close\r\n\r\n";

	INT iErrorWrite = SSL_write(psslSSL, strWrite.c_str(), strWrite.length()) < 0;
	if (iErrorWrite < 0)
	{
		return -1;
	}

	// 收包并输出
	LPSTR lpszRead = new CHAR[8192];
	INT iLength = 1;
	while (iLength >= 1)
	{
		iLength = SSL_read(psslSSL, lpszRead, 8192 - 1);
		if (iLength < 0)
		{
			std::wcout << "Error SSL_read" << std::endl;
			delete[] lpszRead;
			return -1;
		}
		lpszRead[iLength] = TEXT('\0');
		std::wcout << GetWC(lpszRead);
	}
	delete[] lpszRead;

	closesocket(sock);
	WSACleanup();

	system("pause");
	return 0;
}