c++ 实现 http 上传和下载

     代码下载地址:   http://download.csdn.net/detail/mtour/8243527

      最近写了个程序需要用到http通讯，由于flash空间比较小，没有考虑 libcurl库，用c++封装了一个http类，实现了http  文件上传和下载

      #include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include "HttpClient.h"

int main()
{
CHttpClient httpclient;

char* pResponse=new char[32*1024];
memset(pResponse,0,32*1024);

int nRet=httpclient.ConnectServer("127.0.0.1", 80);

if (0!=nRet) {
return -1;
}

nRet=httpclient.HttpGet("/archives/user/10000025/jbox/m6cfaa74922bd00/JssConfig.xml", pResponse);

if (0!=nRet) {
printf("http get failed\n");
return -1;
}

printf("------------- split line -------------- \n");

char* pTmp=strstr(pResponse, "\r\n\r\n");
pTmp+=4;

printf("%s\n",pTmp);

char url[128]="/file/";

httpclient.HttpPostFile(url, "yourfile");

getchar();
//delete [] pResponse;
return 0;
}
类 接口定义

#ifndef __Design__HttpClient__
#define __Design__HttpClient__

#include <stdio.h>
#include "net/Net.h"
#include <errno.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <stdlib.h>

class CHttpClient {
public:
int ConnectServer(char* sHost,int nPort);
int DisconnetServer();
int HttpGet(char* sUrl,char* sResponse);
int HttpPostFile(char* sUrl,char* sFileName);
private:
char m_sHost[32];
char m_sHostIP[32];
int m_nPort;
CTcp m_tcp;
};

#endif /* defined(__Design__HttpClient__) */


实现

//
// HttpClient.cpp
// Design
//
// Created by cwliu on 14-12-5.
// Copyright (c) 2014-12-08 cwliu. All rights reserved.
//

#include "HttpClient.h"

int CHttpClient::ConnectServer(char* sHost,int nPort)
{
//gethostbyname

struct hostent *h;

if((h=gethostbyname(sHost))==NULL)
{
printf("gethostbyname failed\n");
return -1;
}
printf("HostName :%s\n",h->h_name);
sprintf(m_sHostIP, "%s",inet_ntoa(*((struct in_addr *)h->h_addr)));
printf("IP Address :%s\n",m_sHostIP);
m_nPort=nPort;

int nRet=m_tcp.Open(nPort, m_sHostIP);
if (0!=nRet) {
printf("socket connect failed\n");
return -1;
}
return 0;
}
int CHttpClient::DisconnetServer()
{
m_tcp.Close();
return 0;
}

int CHttpClient::HttpGet(char* sUrl,char* sResponse)
{

char post[300],host[100],content_len[100];
char *lpbuf,*ptmp;
int len=0;
lpbuf = NULL;
const char *header2="User-Agent: linux_http_client Http 1.0\r\nCache-Control: no-cache\r\nContent-Type: application/x-www-form-urlencoded\r\nAccept: */*\r\n";
sprintf(post,"GET %s HTTP/1.0\r\n",sUrl);
sprintf(host,"HOST: %s:%d\r\n",m_sHostIP,m_nPort);
sprintf(content_len,"Content-Length: %d\r\n\r\n",1);
len = strlen(post)+strlen(host)+strlen(header2)+strlen(content_len)+1;
lpbuf = (char*)malloc(len);
if(lpbuf==NULL)
{
return -1;
}
strcpy(lpbuf,post);
strcat(lpbuf,host);
strcat(lpbuf,header2);
strcat(lpbuf,content_len);
strcat(lpbuf," ");

m_tcp.Send((unsigned char*)lpbuf,len);

int nRet=m_tcp.Recv();
if (nRet>0) {
memcpy(sResponse,m_tcp.GetBuffer(), nRet);
printf("%s\n",sResponse);
}

return 0;
}

int CHttpClient::HttpPostFile(char* sUrl,char* sFileName)
{
// check file and read it
long nFileLen=0;

FILE* pFile=fopen(sFileName,"r");
if (!pFile) {
printf("read file failed\n");
return -1;
}

fseek(pFile, 0, SEEK_END);
nFileLen=ftell(pFile);
printf("File length is %ld\n", nFileLen);

if (!nFileLen) {
printf("file len is 0\n");
return -1;
}

fseek(pFile, 0, SEEK_SET);
char* sFileText=new char[nFileLen+1];
memset(sFileText, 0, nFileLen+1);

fread(sFileText, 1, nFileLen, pFile);

fclose(pFile);

char* pBody=new char[32*1024];
memset(pBody,0,32*1024);

char sContentDisp[128];
sprintf(sContentDisp, "Content-Disposition: form-data;name=\"file\";filename=\"%s\"\r\n",sFileName);
strcat(pBody,"-------------------------------7db372eb000e2\r\n");
strcat(pBody, sContentDisp);
strcat(pBody, "Content-Type: text/plain\r\n\r\n");
strcat(pBody, sFileText);
strcat(pBody, "\r\n-------------------------------7db372eb000e2--\r\n");

char post[300];
sprintf(post,"POST %s HTTP/1.0\r\n",sUrl);
char header[1024];
char host[64];
sprintf(host,"HOST: %s:%d\r\n",m_sHostIP,m_nPort);

char sContentLen[32];
sprintf(sContentLen, "Content-Length: %ld\r\n",strlen(pBody)+1);

// read file and caluate the file

sprintf(header, "%s","Accept:*/*\r\n");
strcat(header, host);
strcat(header, "User-Agent: JboxHttpClient\r\n");
strcat(header, sContentLen);
strcat(header,"Expect: 100-continue\r\n");
strcat(header, "Content-Type:multipart/form-data;boundary=-----------------------------7db372eb000e2\r\n\r\n");

char* pBuf=new char[64*1024];
memset(pBuf, 0, 64*1024);
strcat(pBuf, post);
strcat(pBuf, header);
strcat(pBuf,pBody);

printf("%s\n",pBuf);

m_tcp.Send((unsigned char*)pBuf, strlen(pBuf)+1);

char sResponse[1024];
memset(sResponse, 0, 1024);

int nRet=m_tcp.Recv();
if (nRet>0) {
memcpy(sResponse, m_tcp.GetBuffer(), nRet);
printf("%s\n",sResponse);

if (strstr(sResponse,"200"))
{
delete[] pBody;
delete[] pBuf;
printf("post file success \n");
return 0;
}
else
{
printf("post file failed \n");
}
}
delete[] pBody;
delete[] pBuf;
return -1;
}