com.what3words.javawrapper.What3WordsV3Interceptor Maven / Gradle / Ivy

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Java library for what3words REST API.
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package com.what3words.javawrapper;

import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;

import okhttp3.Interceptor;
import okhttp3.Request;
import okhttp3.Response;

public class What3WordsV3Interceptor implements Interceptor {
    private String apiKey;
    private String userAgent;
    private String packageName;
    private String signature;
    private Map headers;

    public What3WordsV3Interceptor(String apiKey, String packageName, String signature, Map headers) {
        this.apiKey = apiKey;
        this.userAgent = getUserAgent();
        this.packageName = packageName;
        this.signature = signature;
        this.headers = headers;
    }
    
    private String getUserAgent() {
        return "what3words-Java/" + getVersion() + " (Java " + System.getProperty( "java.version" ) + "; "
            + System.getProperty( "os.name" ) + " " + System.getProperty( "os.version" ) + ")";
    }

    private String getVersion() {
        Properties props = new Properties();

        try (InputStream is = getClass().getResourceAsStream("/version.properties")) {
            if (is != null) {
                props.load(is);
            }
        } catch (IOException e) {
        }

        return props.getProperty("version", "unknown-version");
    }

    public Response intercept(Chain chain) throws IOException {
        Request request = chain.request();

        Request.Builder builder = request.newBuilder();

        // set required content type, api key and request specific API version
        builder.header(What3WordsV3.HEADER_CONTENT_TYPE, What3WordsV3.CONTENT_TYPE_JSON);
        builder.header(What3WordsV3.HEADER_WHAT3WORDS_API_KEY, this.apiKey);
        builder.header(What3WordsV3.W3W_WRAPPER, this.userAgent);
        
        // add any custom headers
        if (headers != null) {
            for (Iterator it = headers.keySet().iterator(); it.hasNext();) {
                String name = it.next();
                String value = headers.get(name);
                builder.header(name, value);
            }
        }
        
        if (packageName != null) {
            builder.header(What3WordsV3.ANDROID_PACKAGE_HEADER, this.packageName);
        }
        if (signature != null) {
            builder.header(What3WordsV3.ANDROID_CERT_HEADER, this.signature);
        }

        return chain.proceed(builder.build());
    }
}