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
");
        return -1;
    }

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

    char* pTmp=strstr(pResponse, "

");
    pTmp+=4;

    printf("%s
",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
");
        return -1;
    }
    printf("HostName :%s
",h->h_name);
    sprintf(m_sHostIP, "%s",inet_ntoa(*((struct in_addr *)h->h_addr)));
    printf("IP Address :%s
",m_sHostIP);
    m_nPort=nPort;

    int nRet=m_tcp.Open(nPort, m_sHostIP);
    if (0!=nRet) {
        printf("socket connect failed
");
        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
Cache-Control: no-cache
Content-Type: application/x-www-form-urlencoded
Accept: */*
";
    sprintf(post,"GET %s HTTP/1.0
",sUrl);
    sprintf(host,"HOST: %s:%d
",m_sHostIP,m_nPort);
    sprintf(content_len,"Content-Length: %d

",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
",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
");
        return -1;
    }

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

    if (!nFileLen) {
        printf("file len is 0
");
        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"
",sFileName);
    strcat(pBody,"-------------------------------7db372eb000e2
");
    strcat(pBody, sContentDisp);
    strcat(pBody, "Content-Type: text/plain

");
    strcat(pBody, sFileText);
    strcat(pBody, "
-------------------------------7db372eb000e2--
");


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


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

    // read file and caluate the file


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

");

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


    printf("%s
",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
",sResponse);

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