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

[cpp] view plain copy







#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

[cpp] view plain copy







#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

[cpp] view plain copy







//

// 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;

}