file1.php
    $file = "D:\\ReadFileTo.txt";
    $handle = fopen($file, 'r');
    $sContent = '';
    while(false != ($a = fread($handle, 8080))){//返回false表示已经读取到文件末尾
        $sContent .= $a;
    }
    
    fclose($handle);
    echo "$sContent";vc(输出file1.php):
#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#include<windows.h>  
#include<wininet.h>  
#include<iostream.h>  
#pragma comment(lib,"wininet.lib")  #define DATA_CACHE_SIZE 1024*10
int main(int argc, char* argv[])
{
printf("Hello World!\n"); int i = 0;
char pulr[] = "file1.php";
HINTERNET hinternet=::InternetOpen(
 "http generic",
 INTERNET_OPEN_TYPE_PRECONFIG,
 NULL,
 NULL,
 0);
if (!hinternet)
{
printf("InternetOpen\n");
system("pause");
return 0;
} i = 1;
HINTERNET hconnect= ::InternetConnect(
      hinternet,
      "144.20.80.27",
      8080,
      NULL, //lpszUsername
      NULL, //lpszPassword
      INTERNET_SERVICE_HTTP,
      0, //dwFlags
      0 //dwContext
      );
if (!hconnect)
{
printf("InternetConnect\n");
system("pause");
return 0;
} HINTERNET hHttpOpenRequest=::HttpOpenRequest(
hconnect,
"POST",
pulr,
"HTTP/1.1",
NULL,
0,
INTERNET_FLAG_RELOAD,
0
);
if (!hHttpOpenRequest)
{
printf("HttpOpenRequest\n");
system("pause");
return 0;
} char psHeader[] = "Content-Type: application/x-www-form-urlencoded \n\r";
if (!(HttpAddRequestHeaders(
    hHttpOpenRequest, 
    psHeader, 
    strlen(psHeader), 
    HTTP_ADDREQ_FLAG_REPLACE|HTTP_ADDREQ_FLAG_ADD
    )) )
{
printf("HttpAddRequestHeaders\n");
system("pause");
return 0;
} char *strRet=""; //"Yjr|fc|zf|cym|wjf||role1|role2|role3|role4";
char pstrContent[] = "UserName=admin&Password=-1";
if (! (HttpSendRequest(
    hHttpOpenRequest,
    NULL,
    0,
    (LPVOID)(LPCSTR)pstrContent,
    strlen(pstrContent)
)) )
{
printf("HttpSendRequest\n");
system("pause");
return 0;
} // Get the length of the file.
DWORD dwFileSize=0;
DWORD dwLengthBufQuery = sizeof(dwFileSize);
DWORD dwIndex=0;

BOOL bQuery = ::HttpQueryInfo(hHttpOpenRequest,
HTTP_QUERY_CONTENT_LENGTH
|HTTP_QUERY_FLAG_NUMBER, 
(LPVOID)&dwFileSize/*bufQuery*/, 
&dwLengthBufQuery,
&dwIndex) ;
if (!bQuery)
{
printf("HttpQueryInfo\n");
system("pause");
return 0;
}
// Allocate a buffer for the file.   
char* buffer = new char[dwFileSize+1] ;

//由于不允许HTTP写缓存,所以无需循环调用InternetReadFile
DWORD dwLength=0;
DWORD dwLengthOne=1;
BOOL bRead=TRUE;
char bufferOne[DATA_CACHE_SIZE+10]; strcpy(buffer,"");
while (bRead && dwLengthOne>0)
{
strcpy(bufferOne,"");
if (InternetReadFile(
hHttpOpenRequest,
bufferOne,
DATA_CACHE_SIZE+1,
&dwLengthOne
)

{
if (dwLengthOne>0)
{
memcpy(&buffer[dwLength],bufferOne,dwLengthOne);
dwLength+=dwLengthOne; //接收数据包的大小和与总数据包大小比较
if (dwLength > dwFileSize)
{
printf("while\n");
system("pause");
return 0;
} buffer[dwLength]='\0';
}
}
}
buffer[dwLength]='\0'; //to widerchar
DWORD dwSize = MultiByteToWideChar (CP_ACP, 0, buffer, -1, NULL, 0);
   WCHAR *wchr = new WCHAR [dwSize];
::MultiByteToWideChar(CP_ACP,MB_ERR_INVALID_CHARS,buffer,-1,
 wchr,dwSize);
printf(buffer);
// wprintf(wchr);
delete [] wchr;
delete [] buffer;


::InternetCloseHandle(hHttpOpenRequest);hHttpOpenRequest=NULL; ::InternetCloseHandle(hconnect);hconnect=NULL;
::InternetCloseHandle(hinternet);hinternet=NULL; printf("\n");
system("pause");
return 0;
}问题:
1、环境windows xp + php5 + apache2.2 + vc6.0。
2、当file1.php读取的文件大于8000kb时,输出就会失败。

解决方案 »

  1.   

    不是输出失败,你自己的客户端写得不周全。。这种客户端的问题尽量不要发到php版。谁愿意看一大段C代码HttpQueryInfo     HTTP_QUERY_CONTENT_LENGTH这个是查找http头中的content-length, 输出太长大于一个缓存区就会分段trunk输出,此时http头里就没有content-length了。   即使HttpQueryInfo不报错, 运行到memcpy也会crash
      

  2.   

    分段trunk输出的情况下,也不能简单地把接收到的数据直接写到buffer里,具体自己debug看吧。。每一段都会先告诉你长度