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/*
* Copyright (C) 2008-2023, Juick
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.juick.service;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.juick.www.api.webfinger.Resource;
import com.juick.www.api.webfinger.model.Account;
import com.juick.www.api.webfinger.model.Link;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import org.apache.commons.lang3.StringUtils;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Component;
import org.springframework.web.util.UriComponentsBuilder;
import rocks.xmpp.addr.Jid;
import jakarta.inject.Inject;
import java.io.IOException;
import java.net.URI;
@Component
public class WebfingerService {
private final OkHttpClient httpClient;
private final ObjectMapper jsonMapper;
@Inject
public WebfingerService(final OkHttpClient httpClient, final ObjectMapper jsonMapper) {
this.httpClient = httpClient;
this.jsonMapper = jsonMapper;
}
public URI discoverAccountURI(String acct, MediaType linkType) {
Jid acctId = Jid.of(acct);
var resourceUri = UriComponentsBuilder.fromPath("/.well-known/webfinger").host(acctId.getDomain())
.scheme("https").queryParam("resource", "acct:" + acct).build().toUriString();
var request = new Request.Builder()
.url(resourceUri)
.addHeader(HttpHeaders.ACCEPT, Resource.MEDIA_TYPE)
.build();
try {
try(var response = httpClient.newCall(request).execute()) {
if (response.isSuccessful() && response.body() != null) {
var account = jsonMapper.readValue(response.body().string(), Account.class);
for (Link l : account.links()) {
if (l.rel().equals("self") && l.type().equals(linkType.toString())) {
return URI.create(l.href());
}
}
}
}
} catch (IOException e) {
return URI.create(StringUtils.EMPTY);
}
return URI.create(StringUtils.EMPTY);
}
}
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