發送文件到HTTP服務器（C++的Wininet）

我有代碼爲我的HTTP服務器上上傳小.txt文件：發送文件到HTTP服務器（C++的Wininet）

#include <wininet.h> 
#define BUF_SIZE 4096 

void __fastcall TForm1::Button1Click(TObject *Sender) 
{ 

TStringList * list = new TStringList(); 
AnsiString Path = ""; 

if(OpenDialog1->Execute()) { 

    Path = "filename=\""+OpenDialog1->FileName+"\""; 
    list->LoadFromFile(OpenDialog1->FileName); 

} 

char data[BUF_SIZE] = ""; 
static char hdrs[] = "Content-Type: multipart/form-data; boundary=---------------------------7d82751e2bc0858"; 

strcat(data,"-----------------------------7d82751e2bc0858"); 
strcat(data,"\n"); 
strcat(data,"Content-Disposition: form-data; name=\"files[]\"; "); 
strcat(data,Path.c_str()); 
strcat(data,"\n"); 
strcat(data,"Content-Type: application/octet-stream"); 
strcat(data,"\n\n"); 
strcat(data,list->Text.c_str()); 
strcat(data,"\n"); 
strcat(data,"-----------------------------7d82751e2bc0858"); 
strcat(data,"\n"); 
strcat(data,"Content-Disposition: form-data; name=\"user\""); 
strcat(data,"\r\n\r\n"); 
strcat(data,"username"); 
strcat(data,"\r\n"); 
strcat(data,"-----------------------------7d82751e2bc0858"); 
strcat(data,"\n"); 

HINTERNET hSession = InternetOpen("MyAgent",INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0); 
HINTERNET hConnect = InternetConnect(hSession, "localhost",INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 1); 
HINTERNET hRequest = HttpOpenRequest(hConnect, "POST", "new_upltest.php", NULL, NULL, NULL, 0, 1); 

HttpSendRequest(hRequest, hdrs, strlen(hdrs), data, strlen(data)); 

delete list; 
}

它的正常工作，但現在我需要上傳大文件（超過70 -100 MB），可以是圖像（.jpg，.png，.bmp）和其他文檔類型（.pdf，.docx等）。

是否有可能通過此代碼解決我的任務？我將不勝感激每一個建議...

P.S.我的IDE是C++ Builder 6，但我認爲沒關係。

來源

2017-06-21 Ivan Ivanov

如果您在C++編程，你爲什麼不使用'的std :: string'的「數據」？或者使用'std :: ostringstream'進行格式化？爲什麼動態分配'list'而不是將其定義爲一個簡單的對象實例？ –

@Someprogrammerdude，問題中的IDE將回答您的所有問題:) – Incomputable

2002年編譯器* facepalm *。那麼，它至少比TurboC++ 3更新。 –

一個文件上傳這是工作例如：

void http_upload_file(PCHAR szServer, PCHAR szScript, PCHAR szParam, PCHAR szValue, PCHAR szFile) 
{ 
    PCHAR szHeaders = "Content-Type: multipart/form-data; boundary=----qwerty"; 
    PCHAR szData = "------qwerty\r\n" 
         "Content-Disposition: form-data; name=\"%s\"\r\n\r\n%s\r\n" 
         "------qwerty\r\n" 
         "Content-Disposition: form-data; name=\"files[]\"; filename=\"%s\"\r\n" 
         "Content-Type: application/octet-stream\r\n" 
         "Content-Transfer-Encoding: binary\r\n\r\n"; 
    PCHAR szDataEnd = "\r\n------qwerty--\r\n"; 
    char szHeader[512]; 

    HINTERNET hSession, hConnect, hRequest; 
    DWORD  dwFileSize, dwBytesRead, dwContentLength,dwBytesWritten; 

    hSession = InternetOpen(NULL, INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0); 

    if (hSession) 
    { 
     hConnect = InternetConnect(hSession, szServer, INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP,0, 0); 

     if (hConnect) 
     { 
      hRequest = HttpOpenRequest(hConnect, "POST", szScript, NULL, NULL, 0, 0, 0); 

      if (hRequest) 
      { 
       HANDLE hFile = CreateFile(szFile, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, NULL, NULL); 

       if (hFile != INVALID_HANDLE_VALUE) 
       { 
        dwFileSize  = GetFileSize(hFile, NULL); 
        wsprintf(szHeader, szData, szParam, szValue, szFile); 
        dwContentLength = lstrlen(szHeader) + dwFileSize + lstrlen(szDataEnd); 
        LPBYTE pBuf  = (LPBYTE)malloc(dwContentLength); 
        CopyMemory(&pBuf[0], szHeader, lstrlen(szHeader)); 
        ReadFile(hFile, &pBuf[lstrlen(szHeader)], dwFileSize, &dwBytesRead, NULL); 
        CopyMemory(&pBuf[lstrlen(szHeader) + dwFileSize], szDataEnd, lstrlen(szDataEnd)); 
        HttpSendRequest(hRequest, szHeaders, lstrlen(szHeaders), pBuf, dwContentLength); 
        CloseHandle(hFile); 
        free(pBuf); 
       } 
      } 

      InternetCloseHandle(hRequest); 
     } 

     InternetCloseHandle(hConnect); 
    } 

    InternetCloseHandle(hSession); 
}

來源

2017-06-23 04:20:12

發送文件到HTTP服務器（C++的Wininet）

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