纯C语言进行Get和Post请求（亲测）

废话不多说，直接上代码

#include <stdio.h>
#include "winsock2.h"
#include <string.h>
#pragma comment(lib, "ws2_32.lib")

#define IPSTR "127.0.0.1" //服务器IP地址;
#define PORT 8080 //服务器端口;
#define BUFSIZE 1024

int getResponse(char *httpHeader,int getLength){
	SOCKET      sSocket      = INVALID_SOCKET;
	SOCKADDR_IN stSvrAddrIn = {0}; /* 服务器端地址 */
	char        sndBuf[1024] = {0};
	char        rcvBuf[1024000] = {0};
	char       *pRcv         = rcvBuf;
	int         num          = 0;
	int         nRet         = SOCKET_ERROR;

	WSADATA     wsaData;
	char *delims= {"\n"} ;
	char *p;
	/* HTTP 消息构造开始，这是程序的关键之处 */

	sprintf(sndBuf,httpHeader);
//	printf("postHeader : %s\n",sndBuf);
	/* HTTP 消息构造结束 */

	/* socket DLL初始化 */
	WSAStartup(MAKEWORD(2, 0), &wsaData);
	
	stSvrAddrIn.sin_family      = AF_INET;
	stSvrAddrIn.sin_port        = htons(PORT); //端口
	stSvrAddrIn.sin_addr.s_addr = inet_addr(IPSTR); //IP

	sSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

	/* 连接 */
	nRet = connect(sSocket, (SOCKADDR*)&stSvrAddrIn, sizeof(SOCKADDR));
	if (SOCKET_ERROR == nRet) {
		printf("connect fail!/n");
		return -1;
	}

	/* 发送HTTP请求消息 */
	send(sSocket, (char*)sndBuf, sizeof(sndBuf), 0);

	/* 接收HTTP响应消息 */
	while(1) {
//		num = recv(sSocket, pRcv, 2048, 0);
		num = recv(sSocket, pRcv, sizeof(pRcv), 0);
		pRcv += num;
		if((0 == num) || (-1 == num)) {
			break ;
		}
	}

	/* 打印响应消息 */
//	printf("rev:%s", rcvBuf);
	p=strtok(rcvBuf,"\n");
	int i = 0;
	while(p!=NULL) {
		if(i == getLength)
			printf("word: %s\n",p); //对获取的数据进行分割，获取每一行的数据 
		i++;
		p=strtok(NULL,delims);
	}
	return 1;
}
int getRequest(char *mapping,char *host){
	char httpHeader[2048];
	sprintf(httpHeader,
		"GET %s HTTP/1.1\r\n"
        "Host: %s\r\n"
        "User-Agent: IE or Chrome\r\n"
        "Accept-Type: */*\r\n"
        "Connection: Close\r\n\r\n",mapping,host);
        
	int getStat = getResponse(httpHeader,13);
	return getStat;
}
int postRequest(char *mapping,char *host,char *lenStr,char *message){
	char httpHeader[2048];
	sprintf(httpHeader,"POST %s HTTP/1.1\r\n"
       	"Host: %s\n"
       	"Connection: Close\r\n"
       	"Content-Type: application/json\n"
       	"Content-Length: %s\n\n"
       	"%s"
		,mapping,host,lenStr,message);
        
	int postStat = getResponse(httpHeader,13); 
}
int main() {
	char mapping[1024],host[1024],message[2048], lenStr[1024];
	int len;
	sprintf(mapping,"/admin"); 	//http路径 
	sprintf(host,"%s:%d",IPSTR,PORT); //host地址 
//	调用 getResponse方法，返回头部信息 
//**************************Get************************************
	getRequest(mapping,host);
	
//*************************POST************************************
	sprintf(mapping,"/withBody1"); 	//http路径 
	sprintf(message, 
		"{\"Type\":1, "
		" \"Dev\":1,\"Ch\":1, "
		" \"Data\":{ "
		" \"AlarmCh\":1,\"AlarmOutCount\":1,\"AlarmType\":1 "
		"}}");						//request内容 
	len = strlen(message); 			//post的KV数据 的长度
	sprintf(lenStr,"%d",len); 		//request内容长度 

	postRequest(mapping,host,lenStr,message);
}

注意
手动配置
编译时一定要加入**-lwsock32**命令
添加方式如下

C++版本：https://blog.csdn.net/weixin_45721882/article/details/120932895