III Parser HTTP

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

void printError(const string& errorMessage, size_t errorPos) {
    cout << "\033[1;31mError: " << errorMessage << " at position " << errorPos << "\033[0m" << endl;
}

struct URLComponents {
    string scheme;
    string user;
    string password;
    string host;
    string port;
    string path;
};

void parseURL(const string& urlString) {
    URLComponents components;
    size_t schemePos = urlString.find("://");
    if (schemePos == string::npos) {
        printError("Invalid URL syntax: Expected '://' not found in " + urlString, urlString.length());
        return;
    }
    components.scheme = urlString.substr(0, schemePos);
    size_t hostStartPos = schemePos + 3;
    size_t userEndPos = urlString.find(':', hostStartPos);
    size_t hostEndPos = urlString.find('@', hostStartPos);
    size_t portStartPos = urlString.find(':', hostStartPos);
    size_t pathStartPos = urlString.find('/', schemePos + 3);
    if (components.scheme != "http" && components.scheme != "https" && userEndPos != string::npos &&
        (hostEndPos == string::npos || userEndPos < hostEndPos)) {
        components.user = urlString.substr(hostStartPos, userEndPos - hostStartPos);
        components.password = urlString.substr(userEndPos + 1, hostEndPos - userEndPos - 1);
        components.host = urlString.substr(hostEndPos + 1, (portStartPos != string::npos ? portStartPos : pathStartPos) - hostEndPos - 1);
    }
    else {
        components.host = urlString.substr(hostStartPos, (portStartPos != string::npos ? portStartPos : pathStartPos) - hostStartPos);
    }
    if (portStartPos != string::npos && portStartPos < pathStartPos) {
        components.port = urlString.substr(portStartPos + 1, pathStartPos - portStartPos - 1);
    }
    if (pathStartPos != string::npos) {
        components.path = urlString.substr(pathStartPos);
    }
    cout << "Scheme: " << components.scheme << endl;
    if (components.scheme != "http" && components.scheme != "https") {
        cout << "User: " << components.user << endl;
        cout << "Password: " << components.password << endl;
    }
    cout << "Host: " << components.host << endl;
    cout << "Port: " << (components.port.empty() ? "default" : components.port) << endl;
    cout << "Path: " << components.path << endl;
}

int main() {
    ifstream file("C:\\Users\\Aleksandar\\source\\repos\\Parser_HTTP\\Parser_HTTP\\input.txt");
    if (!file.is_open()) {
        cout << "Unable to open file!" << endl;
        return 1;
    }
    string line;
    while (getline(file, line)) {
        parseURL(line);
        cout << "-----------------------------" << endl;
    }
    file.close();
    return 0;
}