Write a download function in TCP, the text files downloaded 0 KB, exe file lost part of the larger cause can't run,,,

The service side

 DWORD WINAPI CreateClientThread (LPVOID lpParameter)//in this function complete received a path to the file and send the file 
{
The SOCKET socketServer=(SOCKET) lpParameter; 
Char buf_msg [BUFSIZ]; 
Int ret=0; 
Int sresult=0; 
FileHelper fh. 
Do 
{
Memset (buf_msg, 0, BUFSIZ); 
Ret=recv (socketServer buf_msg, BUFSIZ, 0).//received file name 
If (ret & gt; 0) 
{
If (STRCMP (buf_msg, "exit")==0) 
{
Cout & lt; <"The user requests close connection" & lt; break; 
} 
Cout & lt; Char recName [BUFSIZ]; 
Strcpy (recName buf_msg); 
The FILE * f=fh. Selectfile (recName);//the path_buffer got the full path to the E: \ 1. PDF, and f refers to the file 
Char * name=fh. GetFileName ();//the name got the documents and suffix 1. PDF 
Char sendName [BUFSIZ]; 
Strcpy (sendName, name); 
Send (socketServer sendName, BUFSIZ, 0).//send is 1. PDF 
F=fopen (recName, "rb");//file opened in binary mode 
If (f==NULL) 
{
Cout & lt; <"Cannot open file" & lt; The fclose (f); 
system("pause"); 
exit(0); 
} 
The else 
{
//transfer files 
//cycle to send data until the end file 
Int nCount; 
//long long sum=0; 
While ((nCount=fread (sendName, 1, BUFSIZ, f)) & gt; 0) 
{
//cout<(the sum a +=nCount) & lt; Send (socketServer sendName, nCount, 0). 
} 

} 
} 
Else if (ret==0) 
{
Cout & lt; <"Connection has been closed... "& lt; } 
The else 
{
Cerr & lt; <"Receive client information failure" & lt; <: : GetLastError () & lt; <"\ n"; 
Closesocket (socketServer); 
system("pause"); 
return 1; 

} 


} while (ret & gt; 0); 
Ret=shutdown (socketServer SD_SEND); 
If (ret==SOCKET_ERROR) 
{
Cerr & lt; <"Unable to close the socket & lt;" <: : GetLastError () & lt; <"\ n"; 
Closesocket (socketServer); 
system("pause"); 
return 1; 
} 
//delete & amp; Fh.//recycling memory 
//fh=NULL; 
return 0; 
} 

The client

 void Client: : ConnectToServer () 
{
//connection 
FileHelper fh. 
Int fail=connect (socketClient, (SOCKADDR *) & amp; AddrClient, len); 
If (fail) 
{
Cout & lt; <"Connected to the server failed! Program will exit... "& lt; system("pause"); 
exit(1); 
} 
Cout & lt; <"Please input you want to transfer the file name:"; 
Cin & gt;> The Filename. 
//send the address to server 
Send (socketClient, Filename, BUFSIZ, 0). 

//to accept the file name from the server: 1. TXT 
Char revName [BUFSIZ]; 
The recv (socketClient, revName, BUFSIZ, 0); 
Char fromname [BUFSIZ]={}; 
Strcpy (fromname, revName);//fromname: 1. TXT 

Char * dirName=GetDirName ();//to begin to choose a place to build a folder, and then began to transmit content 
Fh. CreateDir (dirName); 
//cout<& lt;" Folder to create success!" ; 
//in dirName directory to create a and server in the same file 
Char mid [3]="\ "; 
Char finame [MAX_PATH]={}; 
Strcat (finame dirName); 
Strcat (finame, mid); 
Strcat (finame fromname); 
The FILE * f=fh. CreateFile (finame); 

//transfer files 
Char buffer [BUFSIZ]="";//file buffer 
Int nCount; 
While ((nCount=recv (socketClient, buffer, BUFSIZ, 0)) & gt; 0) 
{
Fwrite (buffer, nCount, 1, f); 
} 
//Thread. Sleep (10); 
//coutThe fclose (f); 
} 

Unexpected output screenshots

CodePudding user response:

Top here and hope to solve some bosses

CodePudding user response:

Doubt is the problem of fwrite function, general rigorous approach is to judge fwrite returns a value, some are successful to write without successful fwrite once again

CodePudding user response:

Many problems, recName uninitialized variable, send no judgment, the return value

CodePudding user response:

File format is a binary open, write is what format, can't see