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clientMain.cpp
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clientMain.cpp
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#include <string>
#include <iostream>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>
#include <fstream>
#include <thread>
#include "VectorRelated/stringToVec.h"
#include "VectorRelated/typeDistances.h"
#include "Network/networkFunctions.h"
using namespace std;
/// @brief send message to server
/// @param sock socket identifier
/// @param inputString message to send
void sendMessage(int sock, string inputString) {
//sending the data to the server
int sent_bytes = send(sock, inputString.c_str(), inputString.length() + 1, 0);
if (sent_bytes < 0) {
cout << "error while sending to the server!" << endl;
}
}
/// @brief Receive message from server.
/// @param sock socket identifier to receive from
/// @return string of the message receieved
std::string receieveMessage(int sock) {
char buffer[4096];
int expected_data_size = sizeof(buffer);
//recieving the message from the server
// "please upload train csv file"
int read_bytes = recv(sock, buffer, expected_data_size, 0);
//validating that data was recieved
if (read_bytes == 0) {
cout << "the server is closed!" << endl;
//close the client
close(sock);
exit(0);
}
if (read_bytes < 0) {
cout << "error while recieving from the server!" << endl;
}
std::string output(buffer);
return output;
}
//receieve the entire long classified string from server
std::string getClassifiedData(int sock) {
//read the long string from the server
std::string output = "", currentRead;
currentRead = receieveMessage(sock);
if (currentRead == "please upload data.") {
return "please upload the data.";
} else if (currentRead == "please classify the data.") {
return "please classify the data.";
}
//get the file while sending confirmation each package.
while (currentRead != "endOfFile") {
output.append(currentRead);
sendMessage(sock, "accept_read");
currentRead = receieveMessage(sock);
}
return output;
}
/// @brief save results in a file
/// @param filepath path for saving the file (overwrites!!!)
/// @param data data to save
void save_result(std::string filepath, std::string data) {
//TODO:: SAVE OUTPUT IN FILE!!!
//cout << file_path << endl;
//cout << data << endl;
std::ofstream outfile;
outfile.open(filepath);
outfile << data;
outfile.close();
}
//this function checks weather a filepath is valid or not.
bool isPathValid(std::string filepath) {
std::ifstream file(filepath);
return file.good();
}
//gets request string from server, asks user for path, and then reads and sends file
void sendFile(int sock) {
char buffer[4096];
int expected_data_size = sizeof(buffer);
//recieving the message from the server
int read_bytes = recv(sock, buffer, expected_data_size, 0);
//validating that data was recieved
if (read_bytes == 0) {
cout << "the server is closed!" << endl;
//close the client
close(sock);
exit(0);
}
if (read_bytes < 0) {
cout << "error while recieving from the server!" << endl;
return;
}
//and print it
string buffer_string(buffer);
buffer_string.substr(0, read_bytes - 1);
cout << buffer_string << endl;
std::string filePath;
//get input filepath
std::getline(std::cin, filePath);
//make sure that a path is valid
while(!isPathValid(filePath)) {
std::cout << "bad file path. please try again." << std::endl;
std::getline(std::cin, filePath);
}
std::fstream file(filePath, std::ios::in); //start reading from file
std::string line;
//if did not fild the file
//reading from the file
if(file.is_open()){
std::string msg_block = "";
//while still getting rows of vectors
while(getline(file, line)){
if (msg_block.length() + line.length() >= 4080) { //based on buffer size
//send current block and reset block
sendMessage(sock, msg_block); //for '\0'
msg_block = line + "\n";
if (receieveMessage(sock) != "accept_package") {
cout << "Error sending file." << endl;
return;
}
} else {
//append to block, differentiating classified and unclassified files
msg_block.append(line + "\n");
}
}
//send last line
sendMessage(sock, msg_block); //for '\0'
if (receieveMessage(sock) != "accept_package") {
cout << "Error sending file." << endl;
return;
}
sendMessage(sock, "endOfFile");
}
file.close();
}
/// @brief main function for the client
/// @param argc num of arguments
/// @param argv arguments
/// @return exit code
int main(int argc, char* argv[]) {
//first, check if there are three arguments,
if (argc != 3) {
cout << "invalid input" << endl;
return 0;
}
//now, configuring the server ip_adress and port
const char* ip_adress = argv[1];
string port = argv[2];
int portCheck;
//now, checking if the port is correct
try {
portCheck = stoi(port);
}
catch (...) {
//conversion to integet was unsuccesfull. cancelling.
cout << "invalid input" << endl;
return 0;
}
const int port_no = portCheck;
//checking for valid port number. The valud port number ranges from 0 to 65535
if (port_no < 0 || port_no > 65535) {
cout << "invalid input" << endl;
return 0;
}
int sock = networkFunctions::createTCPclientSocket(ip_adress, port_no);
if (sock < 0) {
return 0;
}
//connection established
string inputString = "";
while (inputString != "8") {
char buffer[4096];
int expected_data_size = sizeof(buffer);
//GET MENU
//recieving the answer from the server
int read_bytes = recv(sock, buffer, expected_data_size, 0);
//validating that data was recieved
if (read_bytes == 0) {
cout << "the server is closed!" << endl;
//close the client
close(sock);
return 0;
}
if (read_bytes < 0) {
cout << "error while recieving from the server!" << endl;
}
string buffer_string(buffer);
buffer_string.substr(0, read_bytes - 1);
cout << buffer_string << endl;
//SEND OPTION
//get input from user
std::getline(std::cin, inputString);
int option = 0;
try {
option = stoi(inputString.substr(0, 2));
} catch (...) {
cout << "invalid input" << endl;
continue;
}
std::string serverAnswer = "";
switch (option) {
case 8:
//stop client
inputString = "8";
break;
case 1:
{
sendMessage(sock, "1");
//classified data
sendFile(sock);
//unclassified data
sendFile(sock);
break;
}
case 2:
{
//send the server that user has chosen option number 2
sendMessage(sock, "2");
//sent the user the current KNN parameters, returned from server
cout << receieveMessage(sock) << endl;
//get the new parameters from the user
std::getline(std::cin, inputString);
//if the user has pressed enter, meaning inputString is empty,
//notify the server to keep current parameters
if (inputString == "") {
sendMessage(sock, "keepCurrent");
break;
} else {
//otherwise, send the server the input of the new parameters
sendMessage(sock, inputString);
}
serverAnswer = receieveMessage(sock);
if (serverAnswer == "valid") {
break;
} else {
std::cout << serverAnswer << std::endl;
std::cout << "the format is <K> <Distance metric>" << std::endl;
break;
}
}
case 3:
{
sendMessage(sock, "3");
std::string currentRead = receieveMessage(sock);
if (currentRead == "please upload data.") {
cout << "please upload the data." << endl;
break;
}
cout << currentRead << endl;
break;
}
case 4:
{
sendMessage(sock, "4");
std::string output = getClassifiedData(sock);
//print it
cout << output << endl;
break;
}
case 5:
{
sendMessage(sock, "5");
//get resposne asserting if the request is valid
std::string assertion = receieveMessage(sock);
if (assertion == "please upload data.") {
cout << "please upload data." << endl;
break;
} else if (assertion == "please classify the data.") {
cout << "please classify the data." << endl;
break;
} else if (assertion != "go ahead.") {
cout << "Warning: odd assertion." << endl;
}
//get classified data
std::string classifiedData = getClassifiedData(sock);
//remove the done.
classifiedData = classifiedData.substr(0, classifiedData.length() - 6);
cout << "please enter filepath for download." << endl;
//get input filepath
std::getline(std::cin, inputString);
//otherwise, get the info in a new thread
std::thread command5Thread(save_result, inputString, classifiedData);
command5Thread.detach();
break;
}
default:
//sent the server that the menu choice was invalid
cout << "invalid menu choice" << endl;
sendMessage(sock, "invalid");
}
//send to server
}
//user has exited. closing the socket and exiting.
close(sock);
return 0;
}