client.cpp

#include<iostream>
#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<string.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<netinet/in.h>

int main()
{
    int fd;
    //afileName-audio file name, vfileName-Video file name, file_Buffer-text file
    char fileName[2000],afileName[2000],vfileName[2000],file_Buffer[2000],c,caufile[70000],aufile[7000000],vfile[1000000];
    struct sockaddr_in servaddr;


//  ------------------------------Creating Socket File Descriptor--------------------------------
if ((fd=socket(AF_INET,SOCK_DGRAM,0))<0)
{
    perror("Socket Creation Failed");
    exit(EXIT_FAILURE);
}    
memset(&servaddr,0,sizeof(servaddr));
bzero(&servaddr,sizeof(servaddr));



//-------------------------------Filling Server Information---------------------------------------
servaddr.sin_family=AF_INET;
servaddr.sin_port=htons(6666);
servaddr.sin_addr.s_addr=INADDR_ANY;    //This is for local host machine(single mastd::cine)
//servaddr.sin_addr.s_addr=inet_addr("192.168.99.214");

int choice=1;

// while(choice=!4)
// {
    std::cout<<"Enter \n 1.TEXT \n 2.AUDIO \n 3.VIDEO \n 4.EXIT\n:";
    std::cin>>choice;   
    char num=choice;
    //Input the choice from the user, note the variable is char as we can only send char type in communication(as sendto and recvfrom only receives char type)

                         //Sending the choice to Server
    sendto(fd,&num,sizeof(num),0,(struct sockaddr *)&servaddr,sizeof(struct sockaddr ));

    if(choice==1)
    {
    //In this code we'll use sendto() function rather than recvfrom() bcoz we need to send the files
     //for text file
            std::cout<<"Enter text file name to send: "<<std::endl;
            std::cin>>fileName;
            sendto(fd,fileName,strlen(fileName),0,(struct sockaddr *)&servaddr,sizeof(struct sockaddr));        //Sending filename to server side
            
            FILE *fp;
            fp=fopen(fileName,"r"); //Opening this filename in read mode

            if(fp)
            {
                //After opening it we're copying the file contents in the fileBuffer
                std::cout<<"Reading file contents: "<<std::endl;
                fseek(fp,0,SEEK_END);
                size_t file_size=ftell(fp); 
                fseek(fp,0,SEEK_SET);
                if(fread(file_Buffer,file_size,1,fp)<=0)    //copied into the file_Buffer using fread()
                {
                    std::cout<<"Unable to copy file into buffer or empty file";
                    exit(1);
                }
            }    
            else
            {
                std::cout<<"Can't open file "<<std::endl;
                exit(0);
            }
            std::cout<<"File contents to send "<<file_Buffer<<std::endl; 
            if(sendto(fd,file_Buffer,strlen(file_Buffer),0,(struct sockaddr *)&servaddr, sizeof(struct sockaddr))<0)   //sending the fileBuffer i.e. content of the file
            {
                std::cout<<"File was not sent"<<std::endl;
            }
            else
            {
                std::cout<<"File Sent"<<std::endl;
            }
                fclose(fp);
    }
    else if(choice==2)
    {

    
        //For Audio File
        std::cout<<"Enter audio file name to send: "<<std::endl;
        std::cin>>afileName;
        sendto(fd,afileName,strlen(afileName),0,(struct sockaddr *)&servaddr,sizeof(struct sockaddr));  //sending the name of the file
        FILE *afp;
        afp=fopen(afileName,"r");
        fseek(afp,0,SEEK_END);
        size_t afsize=ftell(afp);       //to see/get the size we use size_t (size_t is unsigned integral type as we don't know the size and type of data)
        fseek(afp,0,SEEK_SET);    //fseek to last point to get the size of audio file  

        if(afp)
        {
            std::cout<<"Reading file contents"<<std::endl;
            if(fread(aufile,afsize,1,afp)<=0)
            {
                std::cout<<"Unable to copy file into buffer or empty file"<<std::endl;
                exit(1);
            }
        }
        else
        {
            std::cout<<"Could not read audio file";
            exit(0);
        }
        if(sendto(fd,aufile,afsize,0,(struct sockaddr *)&servaddr,sizeof(struct sockaddr))<0)    //Sending the contents of the file
        {
            std::cout<<"File was not sent "<<std::endl;
        }
        else
        {
            std::cout<<"File Sent";
        }
        fclose(afp);
        
    }
    
        //For Video File
    else if(choice==3)
    {

        std::cout<<"Enter the video file name to send "<<std::endl;
        std::cin>>vfileName;
        sendto(fd,vfileName,strlen(vfileName),0,(struct sockaddr *)&servaddr,sizeof(struct sockaddr)); //Sendint the name of video file
        FILE *vfp;
        vfp=fopen(vfileName,"r");
        fseek(vfp,0,SEEK_END);
        size_t vfsize=ftell(vfp);  //Getting the size of the video file using size_t
        fseek(vfp,0,SEEK_SET);     //Setting the pointer at last to get the size of video file     

        if(vfp)
        {
           // std::cout<<"Reading file contents"<<std::endl;
            if(fread(vfile,1,vfsize,vfp)<=0)
            {
                std::cout<<"Unable to copy video file into buffer or empty file"<<std::endl;
               // exit(1);
            }
        }
        else
        {
            std::cout<<"Could not read video file: "<<std::endl;
            exit(0);
        }
        if(sendto(fd,vfile,vfsize,0,(struct sockaddr *)&servaddr,sizeof(struct sockaddr ))<0)
        {
            std::cout<<"File was not sent"<<std::endl;
        }
        else
        {
            std::cout<<"File Sent"<<std::endl;
        }
        fclose(vfp);
        
    }
    else if(choice==4)
    {
        close(fd);
    }

}                
            

//}