io.swagger.codegen.v3.utils.URLPathUtil Maven / Gradle / Ivy

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package io.swagger.codegen.v3.utils;

import io.swagger.codegen.v3.CodegenConfig;
import io.swagger.v3.oas.models.OpenAPI;
import io.swagger.v3.oas.models.servers.Server;
import io.swagger.v3.oas.models.servers.ServerVariables;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.text.StrSubstitutor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public class URLPathUtil {

    protected static final Logger LOGGER = LoggerFactory.getLogger(URLPathUtil.class);
    public static String DEFAULT_PATH = "/";
    public static String DEFAULT_PORT = "8080";
    public static final String LOCAL_HOST = "http://localhost:8080";

    public static URL getServerURL(OpenAPI openAPI) {
        final List servers = openAPI.getServers();
        if (servers == null || servers.isEmpty()) {
            return null;
        }
        final Server server = servers.get(0);
        String url = server.getUrl();
        if(url.equals(DEFAULT_PATH)) {
            url = LOCAL_HOST;
        } else if (url.startsWith("/") && url.trim().length() > 1) {
            url = LOCAL_HOST + url;
        }
        try {
            String varReplacedUrl = replaceServerVarsWthDefaultValues(url, server.getVariables());
            return new URL(varReplacedUrl);
        } catch (MalformedURLException e) {
            LOGGER.warn("Not valid URL: " + server.getUrl(), e);
            return null;
        }
    }

    public static URL getServerURL(OpenAPI openAPI, CodegenConfig config) {
        final List servers = openAPI.getServers();
        if (servers == null || servers.isEmpty()) {
            try {
                return new URL(LOCAL_HOST);
            } catch (MalformedURLException e) {
                LOGGER.warn("Bad URL.", e);
            }
        }
        final Server server = servers.get(0);
        String serverUrl = server.getUrl();

        try {
            while (true) {
                if (StringUtils.isBlank(serverUrl)) {
                    serverUrl = LOCAL_HOST;
                    break;
                }
                serverUrl = serverUrl.trim();
                if (serverUrl.toLowerCase().startsWith("http")) {
                    break;
                }
                final String inputURL = config.getInputURL();
                if (StringUtils.isBlank(inputURL) || !inputURL.trim().toLowerCase().startsWith("http")) {
                    serverUrl = LOCAL_HOST;
                    break;
                }
                serverUrl = inputURL;
                break;
            }
            String varReplacedUrl = replaceServerVarsWthDefaultValues(serverUrl, server.getVariables());
            return new URL(varReplacedUrl);
        } catch (Exception e) {
            LOGGER.warn("Not valid URL: " + server.getUrl(), e);
            return null;
        }
    }

    public static String getScheme(OpenAPI openAPI, CodegenConfig config) {
        String scheme;
        URL url = getServerURL(openAPI);
        if (url != null) {
            scheme = url.getProtocol();
        } else {
            scheme = "https";
        }
        if (config != null) {
            scheme = config.escapeText(scheme);
        }
        return scheme;
    }

    public static String getHost(OpenAPI openAPI){
        if (openAPI.getServers() != null && openAPI.getServers().size() > 0) {
            return openAPI.getServers().get(0).getUrl();
        }
        return LOCAL_HOST;
    }

    private static String replaceServerVarsWthDefaultValues(String url, ServerVariables vars) {
        if (vars != null && vars.size() > 0) {
            Map defaultValues = vars.entrySet()
                .stream()
                .collect(Collectors.toMap(
                    Map.Entry::getKey,
                    e -> e.getValue().getDefault() != null ? e.getValue().getDefault() : DEFAULT_PORT));
            return StrSubstitutor.replace(url, defaultValues, "{", "}");
        }
        return url;
    }
}