C++中利用WebService下载文件

来源：互联网发布：linux 系统杀进程日志编辑：程序博客网时间：2024/06/05 15:15

C#写的WebService读取文件到byte[]和读取文件内容到string，代码如下：

[WebMethod]
public byte[] dowloadFile()
{
FileStreamreader = null;
stringfilePath = "C:/Inetpub/wwwroot/ws/wrar38b2sc.exe";

   try
    {
       reader = new FileStream(filePath, FileMode.Open,FileAccess.Read);
       byte[] bytes = new byte[reader.Length];
       reader.Read(bytes, 0, Convert.ToInt32(reader.Length));

       reader.Close();
       return bytes;
    }
    catch(Exception ex)
    {
       throw ex;
    }
   finally
    {
       reader.Close();
    }
}

[WebMethod]
public string ReadFileToString()
{

   StreamReader sr =File.OpenText("C:/Inetpub/wwwroot/ws/test.txt");
   StringBuilder sb = new StringBuilder();
    while(!sr.EndOfStream)
    {
       sb.Append(sr.ReadLine());
    }
   sr.Close();
    returnsb.ToString();
}

C++中调用WebService下载文件

//在工程中添加web引用，添加成功后，既可以编写代码如下

#include "stdafx.h"
#include "WebService.h"
#include <comdef.h>

using namespace Service;
using namespace std;

//调用返回值是字符串类型的WebService方法

void ReadFileToString()
{
CoInitialize(NULL);

HRESULT hr =S_OK;
BSTR hiResult;

CService*myService = new CService; //代理对象，这个对象能从类视图中看到

//myService->SetUrl(L"http://192.168.1.158/ws/Service.asmx");
hr =myService->ReadFileToString(&hiResult);

_bstr_t bb =hiResult;
char* c = bb;

if(FAILED(hr))
{
printf("ReadFileToString调用失败\n");
}
else
{
printf("ReadFileToString调用结果：%s\n",c);
}
SysFreeString(hiResult);
delete myService;
CoUninitialize();
}

//调用返回值是byte[]类型的WebService方法，并转成对应文件

void dowloadFile()
{

//当下来的文件名称，因为WebService方法只返回了文件内容，没有文件名称

//
char *fileName = "wrar38b2sc.exe";

CoInitialize(NULL);

HRESULT hr =S_OK;
ATLSOAP_BLOB hiResult;

CService*myService = new CService; //代理对象，这个对象能从类视图中看到

//发布之后的WebSerivce地址，可以写，也可以不写，我在不写的情况下执行成功

//myService->SetUrl(L"http://192.168.1.158/ws/Service.asmx");
hr =myService->dowloadFile(&hiResult);

unsigned char* c= hiResult.data;

if(FAILED(hr))
{
  printf("dowloadFile调用失败\n");
}
else
{
  printf("dowloadFile调用结果：%s\n",c);
}
FILE*fp;
fp = fopen(fileName, (const char*)("wb"));
fwrite(hiResult.data, hiResult.size, 1,fp);

free(hiResult.data);
fclose(fp);
delete myService;

CoUninitialize();

//执行文件
WinExec(fileName, SW_SHOW);
}

0 0