相同數據包的Apache2 access.log不同

Question

我有一個C ++程序，試圖使用Apache2 Web服務器上運行的PHP應用程序上載文件。 我有一個很奇怪的問題，我不確定該怎么辦。 因此，我使用httpSendRequest（）函數創建了HTTP請求，並且在Wireshark中查看該請求時，其格式似乎正確 。 但是，該文件未上載，並且當我查看用於Apache的access.log文件時，盡管數據包捕獲中明確存在兩者，但沒有顯示用戶代理或內容長度。

作為參考，返回200狀態的請求與使用burp套件而不是使用httpSendRequest的程序發送的數據包相同，並且我還能夠使用Web瀏覽器成功上傳文件。

這是使用httpSendRequest創建請求的代碼，其中大部分直接從此codeguru 帖子中獲取 。

#include <windows.h>
#include <wininet.h>
#include <iostream>


#define ERROR_OPEN_FILE       10
#define ERROR_MEMORY          11
#define ERROR_SIZE            12
#define ERROR_INTERNET_OPEN   13
#define ERROR_INTERNET_CONN   14
#define ERROR_INTERNET_REQ    15
#define ERROR_INTERNET_SEND   16

using namespace std;

int main()
{
   // Local variables
   static char *filename   = "test.txt";   //Filename to be loaded
   static char *type       = "image/jpg";
   static char boundary[]  = "PaulRules";            //Header boundary
   static char nameForm[]  = "fileToUpload";     //Input form name
   static char iaddr[]     = "192.168.0.105";        //IP address
   static char url[]       = "upload.php";         //URL

   char hdrs[255];                  //Headers
   char * buffer;                   //Buffer containing file + headers
   char * content;                  //Buffer containing file
   FILE * pFile;                    //File pointer
   long lSize;                      //File size
   size_t result;


   // Open file
   pFile = fopen ( filename , "rb" );
   if (pFile==NULL) return ERROR_OPEN_FILE;

   // obtain file size:
   fseek (pFile , 0 , SEEK_END);
   lSize = ftell (pFile);
   rewind (pFile);

   // allocate memory to contain the whole file:
   content = (char*) malloc (sizeof(char)*lSize);
   if (content == NULL) return ERROR_MEMORY;

   // copy the file into the buffer:
   result = fread (content,1,lSize,pFile);
   if (result != lSize) return ERROR_SIZE;

   // terminate
   fclose (pFile);

   //allocate memory to contain the whole file + HEADER
   buffer = (char*) malloc (sizeof(char)*lSize + 2048);

   //print header
   sprintf(hdrs,"Content-Type: multipart/form-data; boundary=%s",boundary);
   sprintf(buffer,"--%s\r\nContent-Disposition: form-data; name=\"fileToUpload\"; filename=\"test.bmp\"\r\n",boundary,nameForm,filename);
   sprintf(buffer,"%sContent-Type: %s\r\n\r\n",buffer,type);

   int cb = strlen(buffer);
   char * bp = buffer + cb;
   memcpy(bp, content, lSize);
   bp += lSize;
   int cw = sprintf(bp,"\r\n--%s--\r\n",boundary);

   //Open internet connection
   HINTERNET hSession = InternetOpen("Paul was here :)",INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
   if(hSession==NULL) return ERROR_INTERNET_OPEN;

   HINTERNET hConnect = InternetConnect(hSession, iaddr,INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 1);
   if(hConnect==NULL) return ERROR_INTERNET_CONN;

   HINTERNET hRequest = HttpOpenRequest(hConnect, (const char*)"POST",url, NULL, NULL, (const char**)"*/*", 0, 1);
   if(hRequest==NULL) return ERROR_INTERNET_REQ;

   BOOL sent= HttpSendRequest(hRequest, hdrs, strlen(hdrs), buffer, cb + lSize + cw);
   if(!sent) return ERROR_INTERNET_SEND;

   //close any valid internet-handles
   InternetCloseHandle(hSession);
   InternetCloseHandle(hConnect);
   InternetCloseHandle(hRequest);

   return 0;
}

這是服務器端的PHP腳本

<?php
$target_dir = "recvFile/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);

// Check if file already exists
if (file_exists($target_file)) {
    echo "File already exists";
    $uploadOk = 0;
}

// Check file size
if ($_FILES["fileToUpload"]["size"] > 500000) {
    echo "File to large";
    $uploadOk = 0;
}

// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
    echo "ERROR File not uploaded";
}

//attempt to upload the file
else {
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
        //echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
        echo "Command:1";
    }
    else {
        echo $_FILES["fileToUpload"]["tmp_name"];
        echo "ERROR uploading file";
    }
}
?>

Answer 1

您的源文件是"test.txt"但是您正在上載到"test.bmp" 。 使它們具有相同的擴展名。

type = "image/jpg";

如果應該將文本type更改為"image/*"或"text/*" 。

您的操作可能成功完成，因為它會顯示"Command 1" 。 該文件可能在那里，但不是您期望的文件。 如果沒有，請查看可以從PHP端提取的錯誤。

sprintf(buffer,"--%s\r\nContent-Disposition: form-data; \
name=\"fileToUpload\"; filename=\"test.bmp\"\r\n",
boundary,nameForm,filename);

您有一個格式說明符"%s"和4個參數。 刪除最后兩個參數。

推薦使用HttpOpenRequest的方法：

const char *accept[] = { "image/*", NULL }; // or `"text/*"`
HttpOpenRequest(hConnect, "POST",url, NULL, NULL, accept, 0, 1);

---

使用C ++編寫代碼

 #include <Windows.h> #include <Wininet.h> #include <iostream> #include <fstream> #include <sstream> #include <string> #pragma comment(lib, "wininet.lib") int main() { HINTERNET hsession = NULL; HINTERNET hconnect = NULL; HINTERNET hrequest = NULL; const char* server = "localhost"; const char* url = "upload.php"; const char* type = "image/*"; std::string filename = "test.bmp"; std::ifstream infile("c:\\\\test\\\\test.bmp", std::ios::binary); if(!infile) return 0; std::ostringstream oss; oss << infile.rdbuf(); std::string headers = "Content-type: multipart/form-data, boundary=uniquestring"; std::string data = "--uniquestring\\r\\n\\ Content-Disposition: form-data; name=\\"fileToUpload\\"; filename=\\"%1\\"\\r\\n\\ Content-Type: %2\\r\\n\\ \\r\\n\\ %3\\r\\n\\ --uniquestring--"; data.replace(data.find("%1"), 2, filename); data.replace(data.find("%2"), 2, type); data.replace(data.find("%3"), 2, oss.str()); hsession = InternetOpen("appname", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0); if(!hsession) goto cleanup; hconnect = InternetConnect(hsession, server, INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 1); if(!hconnect) goto cleanup; const char *accept[] = { type, NULL }; hrequest = HttpOpenRequest(hconnect, "POST", url, NULL, NULL, accept, 0, 1); if(!hrequest) goto cleanup; BOOL sent = HttpSendRequest(hrequest, headers.data(), headers.size(), &data[0], data.size()); if(sent) { DWORD bufsize = 4096; std::string read(bufsize, 0); InternetReadFile(hrequest, &read[0], bufsize, &bufsize); read.resize(bufsize); std::cout << read << "\\n"; } else { goto cleanup; } cleanup: if(hrequest) InternetCloseHandle(hrequest); if(hconnect) InternetCloseHandle(hconnect); if(hsession) InternetCloseHandle(hsession); return 0; } 

Answer 2

為了完整起見，這里是完整的操作代碼

#include <windows.h>
#include <wininet.h>
#include <iostream>

using namespace std;
int main()
{
   // Local variables
   static char *filename   = "Desert.jpg";   //Filename to be loaded
   static char *type       = "multipart/form-data";
   static char boundary[]  = "PaulRules";            //Header boundary
   static char nameForm[]  = "fileToUpload";     //Input form name
   static char iaddr[]     = "192.168.0.105";        //IP address
   static char url[]       = "upload.php";         //URL

   char hdrs[255];                  //Headers
   char * buffer;                   //Buffer containing file + headers
   char * content;                  //Buffer containing file
   FILE * pFile;                    //File pointer
   long lSize;                      //File size
   size_t result;


   // Open file
   pFile = fopen ( filename , "rb" );

   // obtain file size:
   fseek (pFile , 0 , SEEK_END);
   lSize = ftell (pFile);
   rewind (pFile);

   // allocate memory to contain the whole file:
   content = (char*) malloc (sizeof(char)*lSize);

   // copy the file into the buffer:
   result = fread (content,1,lSize,pFile);

   // terminate
   fclose (pFile);

   //allocate memory to contain the whole file + HEADER
   buffer = (char*) malloc (sizeof(char)*lSize + 2048);

   //print header
   sprintf(hdrs,"Content-Type: multipart/form-data; boundary=%s",boundary);
   sprintf(buffer,"--%s\r\nContent-Disposition: form-data; name=\"fileToUpload\"; filename=\"%s\"\r\n",boundary, filename);
   sprintf(buffer,"%sContent-Type: %s\r\n\r\n",buffer,type);

   int cb = strlen(buffer);
   char * bp = buffer + cb;
   memcpy(bp, content, lSize);
   bp += lSize;
   int cw = sprintf(bp,"\r\n--%s--\r\n",boundary);

   //Open internet connection
   HINTERNET hSession = InternetOpen("Winsock",INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);

   HINTERNET hConnect = InternetConnect(hSession, iaddr,INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 1);

   const char* accept[] = {"*/*", NULL};
   HINTERNET hRequest = HttpOpenRequest(hConnect, (const char*)"POST",url, NULL, NULL, accept, 0, 1);

   BOOL sent= HttpSendRequest(hRequest, hdrs, strlen(hdrs), buffer, cb + lSize + cw);

   DWORD dwSize, dwRead;
   CHAR szBuffer[1024];
   if(!InternetQueryDataAvailable(hRequest, &dwSize, 0, 0)){
      std::cout << "QUERYDATA ERROR: " << GetLastError() << std::endl;
   }
   else{
      while(InternetReadFile(hRequest, szBuffer, sizeof(szBuffer)-1, &dwRead) && dwRead) {
        szBuffer[dwRead] = 0;
        dwRead=0;
      }
      cout << szBuffer;
   }

   //close any valid internet-handles
   InternetCloseHandle(hSession);
   InternetCloseHandle(hConnect);
   InternetCloseHandle(hRequest);

   return 0;
}