C++POST方式传图片，服务器收到的内容不对

herost 2011-05-17 01:51:13

用C++ winsock方式传图片，结果服务器只收到4字节..代码如下：
void file_con(char **buffer,LPCSTR file)
{
FILE *fp = fopen(file, "rb+");
fseek(fp, 0, SEEK_END);
long l_file_len = ftell(fp);
rewind(fp);

*buffer = new char[l_file_len + 1];
memset(*buffer, 0, l_file_len + 1);
fread(*buffer, l_file_len, 1, fp);
fclose(fp);
}
std::string upload(LPCSTR lpszServer,LPCSTR lpszAddr,LPCSTR file)
{
char *f = NULL;
file_con(&f,file);
SOCKET sock = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sock == INVALID_SOCKET)
return "0";
SOCKADDR_IN server;
server.sin_family = AF_INET;
server.sin_port = htons(80);
struct hostent *host_addr = gethostbyname(lpszServer);
if (host_addr == NULL)
return "host_addr == NULL";
server.sin_addr.s_addr = *((int *) *host_addr->h_addr_list);
if (::connect(sock, (SOCKADDR *) &server, sizeof(SOCKADDR_IN)) == SOCKET_ERROR)
{
::closesocket(sock);
return "0";
}
printf("ip address = %s, port = %d\n",inet_ntoa(server.sin_addr), ntohs(server.sin_port));

std::string header("");

header += "POST ";
header += lpszAddr;
header += " HTTP/1.1\r\n";
header += "User-Agent: Mozilla/4.0\r\n";
header += "Host: ";
header += lpszServer;
header += "\r\n";
header += "Pragma: no-cache\r\n";
header += "Accept: */*\r\n";
header += "Content-Type: multipart/form-data; boundary=----------------------------64b23e4066ed\r\n";
std::string content("");
content += "------------------------------64b23e4066ed\r\n";
content += "Content-Disposition: form-data; name='id'\r\n\r\n";
content += "3365863\r\n";
content += "------------------------------64b23e4066ed\r\n";
content += "Content-Disposition: form-data; name='myfiles'; filename='img.jpg'\r\n";
content += "Content-Type: custom\r\n\r\n";
content += f;
content += "\r\n------------------------------64b23e4066ed--\r\n";

char temp[64] = {0};
sprintf(temp, "Content-Length: %d\r\n\r\n", content.length());
header += temp;
std::string str_http_request = header + content;
send(sock, str_http_request.c_str(), str_http_request.length(), 0);
char szBuffer[1024] = {0};
while (true)
{
int nRet = ::recv(sock, szBuffer, sizeof(szBuffer), 0);
if (nRet == 0 || nRet == WSAECONNRESET)
{
printf("Connection Closed.\n");
break;
}
else if (nRet == SOCKET_ERROR)
{
printf("socket error\n");
break;
}
else
{
printf("recv() returned %d bytes\n", nRet);
printf("received: %s\n", szBuffer);
break;
}
}
::closesocket(sock);
delete [] lrc;
return szBuffer;
}
void main() {
upload("localhost","http://localhost/upload.php","e:\/a.jpg")
}

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