Using C + + to develop the file upload function based on TCP protocol

Using C + + to develop the file upload function based on TCP protocol

2005 I am working as a programmer in a game company, I have been watching the book "Windows network Programming", I have tried every IO model mentioned in it, it is highly recommended that students who learn network programming read more deeply than Apue.

• This is part of a bank AD project (a peer video)
• The IO model uses the blocking mode, which is uploaded directly when the file is opened.
• Compile with VC 2003, generate Win32 DLL
• Perfectly formed, Csimplesocket,creadstream

• DLL output a virtual class

  2. extern "C" __declspec(dllexport)
     
  8. Isendfileinterface * createsendfile()
     
  10. {
      
  12. return new cfileclient();
      
  14. }
      

• The interface is defined as follows

  2. typedef struct
     
  4. {
     
  6. unsigned int uploaded; //Number of bytes already uploaded
     
  8. bool finished;
     
  10. }transinfo, *ptransinfo;
      
  16. struct isendfileinterface
      
  18. {
      
  22. Virtual ~isendfileinterface() {};
      
  24. //return>0:file Size
      
  26. //return=0:zero byte file or error
      
  28. Virtual unsigned int chosefile(const char *file ,int type) =0;
      
  34. Connecting to a server
      
  36. Virtual bool Connect(const char *host,unsigned short port) =0;
      
  42. Blocking calls
      
  44. -1:socket Error
      
  46. 0: Upload Complete
      
  48. Virtual int SendFile(ptransinfo info) =0;
      
  54. Virtual void Stop() =0;
      
  60. Virtual const char *geterror() =0;
      
  64. };

Developing TCP protocol-based file upload functionality in C + +