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Moving to new Google Photos API, exporter (dtinit#439)
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139 changes: 139 additions & 0 deletions
139
...ain/java/org/dataportabilityproject/datatransfer/google/photos/GooglePhotosInterface.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| /* | ||
| * Copyright 2018 The Data Transfer Project Authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package org.dataportabilityproject.datatransfer.google.photos; | ||
|
|
||
| import com.fasterxml.jackson.databind.ObjectMapper; | ||
| import com.google.api.client.auth.oauth2.Credential; | ||
| import com.google.api.client.http.GenericUrl; | ||
| import com.google.api.client.http.HttpContent; | ||
| import com.google.api.client.http.HttpRequest; | ||
| import com.google.api.client.http.HttpRequestFactory; | ||
| import com.google.api.client.http.HttpResponse; | ||
| import com.google.api.client.http.HttpTransport; | ||
| import com.google.api.client.http.javanet.NetHttpTransport; | ||
| import com.google.api.client.http.json.JsonHttpContent; | ||
| import com.google.api.client.json.jackson2.JacksonFactory; | ||
| import com.google.api.client.util.ArrayMap; | ||
| import com.google.common.base.Charsets; | ||
| import com.google.common.io.CharStreams; | ||
| import java.io.IOException; | ||
| import java.io.InputStreamReader; | ||
| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.LinkedHashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
| import java.util.stream.Collectors; | ||
| import org.dataportabilityproject.datatransfer.google.photos.model.AlbumListResponse; | ||
| import org.dataportabilityproject.datatransfer.google.photos.model.MediaItemSearchResponse; | ||
| import org.dataportabilityproject.types.transfer.auth.TokensAndUrlAuthData; | ||
|
|
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| public class GooglePhotosInterface { | ||
|
|
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| private static final String BASE_URL = "https://photoslibrary.googleapis.com/v1/"; | ||
| private static final int ALBUM_PAGE_SIZE = 20; // TODO | ||
| private static final int MEDIA_PAGE_SIZE = 100; // TODO | ||
|
|
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| private final ObjectMapper objectMapper = new ObjectMapper(); | ||
| private final HttpTransport httpTransport = new NetHttpTransport(); | ||
| private final Credential credential; | ||
|
|
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| public GooglePhotosInterface(Credential credential) { | ||
| this.credential = credential; | ||
| } | ||
|
|
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| public AlbumListResponse listAlbums(Optional<String> pageToken) throws IOException { | ||
| Map<String, String> params = new LinkedHashMap<>(); | ||
| params.put("pageSize", String.valueOf(ALBUM_PAGE_SIZE)); | ||
| if (pageToken.isPresent()) { | ||
| params.put("pageToken", pageToken.get()); | ||
| } | ||
| return makeGetRequest(BASE_URL + "albums", Optional.of(params), | ||
| AlbumListResponse.class); | ||
| } | ||
|
|
||
| public MediaItemSearchResponse listAlbumContents(String albumId, Optional<String> pageToken) | ||
| throws IOException { | ||
| Map<String, String> params = new LinkedHashMap<>(); | ||
| params.put("pageSize", String.valueOf(MEDIA_PAGE_SIZE)); | ||
| params.put("albumId", albumId); | ||
| if (pageToken.isPresent()) { | ||
| params.put("pageToken", pageToken.get()); | ||
| } | ||
| HttpContent content = new JsonHttpContent(new JacksonFactory(), params); | ||
| return makePostRequest(BASE_URL + "mediaItems:search", Optional.empty(), content, | ||
| MediaItemSearchResponse.class); | ||
| } | ||
|
|
||
| private <T> T makeGetRequest(String url, Optional<Map<String, String>> parameters, Class<T> clazz) | ||
| throws IOException { | ||
| HttpRequestFactory requestFactory = httpTransport.createRequestFactory(); | ||
| HttpRequest getRequest = requestFactory | ||
| .buildGetRequest(new GenericUrl(url + "?" + generateParamsString(parameters))); | ||
| HttpResponse response = getRequest.execute(); | ||
| int statusCode = response.getStatusCode(); | ||
| if (statusCode != 200) { | ||
| throw new IOException( | ||
| "Bad status code: " + statusCode + " error: " + response.getStatusMessage()); | ||
| } | ||
| String result = CharStreams | ||
| .toString(new InputStreamReader(response.getContent(), Charsets.UTF_8)); | ||
| return objectMapper.readValue(result, clazz); | ||
| } | ||
|
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| private <T> T makePostRequest(String url, Optional<Map<String, String>> parameters, | ||
| HttpContent httpContent, Class<T> clazz) | ||
| throws IOException { | ||
| HttpRequestFactory requestFactory = httpTransport.createRequestFactory(); | ||
| HttpRequest getRequest = requestFactory | ||
| .buildPostRequest(new GenericUrl(url + "?" + generateParamsString(parameters)), | ||
| httpContent); | ||
| HttpResponse response = getRequest.execute(); | ||
| int statusCode = response.getStatusCode(); | ||
| if (statusCode != 200) { | ||
| throw new IOException( | ||
| "Bad status code: " + statusCode + " error: " + response.getStatusMessage()); | ||
| } | ||
| String result = CharStreams | ||
| .toString(new InputStreamReader(response.getContent(), Charsets.UTF_8)); | ||
| return objectMapper.readValue(result, clazz); | ||
| } | ||
|
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| private String generateParamsString(Optional<Map<String, String>> params) { | ||
| Map<String, String> updatedParams = new ArrayMap<>(); | ||
| if (params.isPresent()) { | ||
| updatedParams.putAll(params.get()); | ||
| } | ||
| if (!updatedParams.containsKey("access_token")) { | ||
| updatedParams.put("access_token", credential.getAccessToken()); | ||
| } | ||
|
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| List<String> orderedKeys = updatedParams.keySet().stream().collect(Collectors.toList()); | ||
| Collections.sort(orderedKeys); | ||
|
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| List<String> paramStrings = new ArrayList<>(); | ||
| for (String key : orderedKeys) { | ||
| String k = key.trim(); | ||
| String v = updatedParams.get(key).trim(); | ||
|
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| paramStrings.add(k + "=" + v); | ||
| } | ||
|
|
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| return String.join("&", paramStrings); | ||
| } | ||
| } |
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