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/*
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* Copyright © 2013 – 2015 Ricki Hirner (bitfire web engineering).
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the GNU Public License v3.0
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* which accompanies this distribution, and is available at
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* http://www.gnu.org/licenses/gpl.html
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*/
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package at.bitfire.davdroid;
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import android.os.Build;
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import com.squareup.okhttp.Authenticator;
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import com.squareup.okhttp.Credentials;
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import com.squareup.okhttp.Interceptor;
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import com.squareup.okhttp.OkHttpClient;
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import com.squareup.okhttp.Request;
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import com.squareup.okhttp.Response;
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import com.squareup.okhttp.logging.HttpLoggingInterceptor;
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import java.io.IOException;
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import java.net.Proxy;
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import java.text.SimpleDateFormat;
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import java.util.List;
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import java.util.concurrent.TimeUnit;
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import at.bitfire.dav4android.HttpUtils;
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import lombok.RequiredArgsConstructor;
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public class HttpClient extends OkHttpClient {
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protected static final String HEADER_AUTHORIZATION = "Authorization";
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final static UserAgentInterceptor userAgentInterceptor = new UserAgentInterceptor();
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final static HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {
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@Override
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public void log(String message) {
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Constants.log.trace(message);
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}
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});
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static {
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loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
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}
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static final String userAgent;
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static {
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String date = new SimpleDateFormat("yyyy/MM/dd").format(BuildConfig.buildTime);
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userAgent = "DAVdroid/" + BuildConfig.VERSION_NAME + " (" + date + "; dav4android) Android/" + Build.VERSION.RELEASE;
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}
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protected String username, password;
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public HttpClient() {
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super();
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initialize();
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}
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public HttpClient(String username, String password, boolean preemptive) {
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super();
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initialize();
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// authentication
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this.username = username;
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this.password = password;
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if (preemptive)
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networkInterceptors().add(new PreemptiveAuthenticationInterceptor(username, password));
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else
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setAuthenticator(new DavAuthenticator(null, username, password));
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}
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/**
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* Creates a new HttpClient (based on another one) which can be used to download external resources:
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* 1. it does not use preemptive authentiation
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* 2. it only authenticates against a given host
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* @param client user name and password from this client will be used
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* @param host authentication will be restricted to this host
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*/
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public HttpClient(HttpClient client, String host) {
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super();
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initialize();
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username = client.username;
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password = client.password;
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setAuthenticator(new DavAuthenticator(host, username, password));
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}
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protected void initialize() {
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// don't follow redirects automatically because this may rewrite DAV methods to GET
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setFollowRedirects(false);
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// set timeouts
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setConnectTimeout(30, TimeUnit.SECONDS);
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setWriteTimeout(15, TimeUnit.SECONDS);
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setReadTimeout(45, TimeUnit.SECONDS);
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// add User-Agent to every request
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networkInterceptors().add(userAgentInterceptor);
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// enable logs
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enableLogs();
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}
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protected void enableLogs() {
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interceptors().add(loggingInterceptor);
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}
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static class UserAgentInterceptor implements Interceptor {
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@Override
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public Response intercept(Chain chain) throws IOException {
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Request request = chain.request().newBuilder()
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.header("User-Agent", userAgent)
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.build();
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return chain.proceed(request);
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}
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}
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@RequiredArgsConstructor
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static class PreemptiveAuthenticationInterceptor implements Interceptor {
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final String username, password;
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@Override
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public Response intercept(Chain chain) throws IOException {
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Request request = chain.request().newBuilder()
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.header("Authorization", Credentials.basic(username, password))
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.build();
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return chain.proceed(request);
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}
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}
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@RequiredArgsConstructor
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public static class DavAuthenticator implements Authenticator {
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final String host, username, password;
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@Override
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public Request authenticate(Proxy proxy, Response response) throws IOException {
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Request request = response.request();
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if (host != null && !request.httpUrl().host().equalsIgnoreCase(host)) {
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Constants.log.warn("Not authenticating against " + host + " for security reasons!");
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return null;
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}
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// check whether this is the first authentication try with our credentials
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Response priorResponse = response.priorResponse();
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boolean triedBefore = priorResponse != null ? priorResponse.request().header(HEADER_AUTHORIZATION) != null : false;
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if (triedBefore)
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// credentials didn't work last time, and they won't work now → stop here
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return null;
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//List<HttpUtils.AuthScheme> schemes = HttpUtils.parseWwwAuthenticate(response.headers("WWW-Authenticate"));
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// TODO Digest auth
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return request.newBuilder()
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.header(HEADER_AUTHORIZATION, Credentials.basic(username, password))
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.build();
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}
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@Override
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public Request authenticateProxy(Proxy proxy, Response response) throws IOException {
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return null;
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}
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}
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}
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