Java youtube API 错误 403 超出未经身份验证使用的每日限制
Java youtube API error 403 Daily Limit for Unauthenticated Use Exceeded
我对以下代码有疑问：我正在尝试使用 youtube API v3 到 运行 简单的地理定位代码（第一个代码），但我一直收到服务错误 403已超出未经身份验证使用的每日限制继续使用需要注册。
我在 youtube.properties 文件中存储了一个有效密钥，并且在 google.console.developpers 页面上激活了 YouTube 数据 API。我不明白这个问题，因为当我 运行 使用相同身份验证系统的更简单的代码（第二代码）时，它可以工作。
第一个代码：无效
/*
* Copyright (c) 2014 Google Inc.
*
* 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
*
* http://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 com.google.api.services.samples.youtube.cmdline.data;
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.util.Joiner;
import com.google.api.services.samples.youtube.cmdline.Auth;
import com.google.api.services.youtube.YouTube;
import com.google.api.services.youtube.model.GeoPoint;
import com.google.api.services.youtube.model.SearchListResponse;
import com.google.api.services.youtube.model.SearchResult;
import com.google.api.services.youtube.model.Thumbnail;
import com.google.api.services.youtube.model.Video;
import com.google.api.services.youtube.model.VideoListResponse;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
/**
* This sample lists videos that are associated with a particular keyword and are in the radius of
* particular geographic coordinates by:
*
* 1. Searching videos with "youtube.search.list" method and setting "type", "q", "location" and
* "locationRadius" parameters.
* 2. Retrieving location details for each video with "youtube.videos.list" method and setting
* "id" parameter to comma separated list of video IDs in search result.
*
* @author Ibrahim Ulukaya
*/
public class GeolocationSearch {
/**
* Define a global variable that identifies the name of a file that
* contains the developer's API key.
*/
private static final String PROPERTIES_FILENAME = "youtube.properties";
private static final long NUMBER_OF_VIDEOS_RETURNED = 25;
/**
* Define a global instance of a Youtube object, which will be used
* to make YouTube Data API requests.
*/
private static YouTube youtube;
/**
* Initialize a YouTube object to search for videos on YouTube. Then
* display the name and thumbnail image of each video in the result set.
*
* @param args command line args.
*/
public static void main(String[] args) {
// Read the developer key from the properties file.
Properties properties = new Properties();
try {
InputStream in = GeolocationSearch.class.getResourceAsStream("/" + PROPERTIES_FILENAME);
properties.load(in);
} catch (IOException e) {
System.err.println("There was an error reading " + PROPERTIES_FILENAME + ": " + e.getCause()
+ " : " + e.getMessage());
System.exit(1);
}
try {
// This object is used to make YouTube Data API requests. The last
// argument is required, but since we don't need anything
// initialized when the HttpRequest is initialized, we override
// the interface and provide a no-op function.
youtube = new YouTube.Builder(Auth.HTTP_TRANSPORT, Auth.JSON_FACTORY, new HttpRequestInitializer() {
public void initialize(HttpRequest request) throws IOException {
}
}).setApplicationName("youtube-cmdline-geolocationsearch-sample").build();
// Prompt the user to enter a query term.
String queryTerm = getInputQuery();
// Prompt the user to enter location coordinates.
String location = getInputLocation();
// Prompt the user to enter a location radius.
String locationRadius = getInputLocationRadius();
// Define the API request for retrieving search results.
YouTube.Search.List search = youtube.search().list("id,snippet");
// Set your developer key from the {{ Google Cloud Console }} for
// non-authenticated requests. See:
// {{ https://cloud.google.com/console }}
String apiKey = properties.getProperty("youtube.apikey");
search.setKey(apiKey);
search.setQ(queryTerm);
search.setLocation(location);
search.setLocationRadius(locationRadius);
// Restrict the search results to only include videos. See:
// https://developers.google.com/youtube/v3/docs/search/list#type
search.setType("video");
// As a best practice, only retrieve the fields that the
// application uses.
//search.setFields("items(id/kind,id/videoId,snippet/title,snippet/thumbnails/default/url)");
search.setFields("items(id/videoId)");
search.setMaxResults(NUMBER_OF_VIDEOS_RETURNED);
// Call the API and print results.
SearchListResponse searchResponse = search.execute();
List<SearchResult> searchResultList = searchResponse.getItems();
List<String> videoIds = new ArrayList<String>();
if (searchResultList != null) {
// Merge video IDs
for (SearchResult searchResult : searchResultList) {
videoIds.add(searchResult.getId().getVideoId());
}
Joiner stringJoiner = Joiner.on(',');
String videoId = stringJoiner.join(videoIds);
// Call the YouTube Data API's youtube.videos.list method to
// retrieve the resources that represent the specified videos.
YouTube.Videos.List listVideosRequest = youtube.videos().list("snippet, recordingDetails").setId(videoId);
VideoListResponse listResponse = listVideosRequest.execute();
List<Video> videoList = listResponse.getItems();
if (videoList != null) {
prettyPrint(videoList.iterator(), queryTerm);
}
}
} catch (GoogleJsonResponseException e) {
System.err.println("There was a service error: " + e.getDetails().getCode() + " : "
+ e.getDetails().getMessage());
} catch (IOException e) {
System.err.println("There was an IO error: " + e.getCause() + " : " + e.getMessage());
} catch (Throwable t) {
t.printStackTrace();
}
}
/*
* Prompt the user to enter a query term and return the user-specified term.
*/
private static String getInputQuery() throws IOException {
String inputQuery = "";
System.out.print("Please enter a search term: ");
BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));
inputQuery = bReader.readLine();
if (inputQuery.length() < 1) {
// Use the string "YouTube Developers Live" as a default.
inputQuery = "YouTube Developers Live";
}
return inputQuery;
}
/*
* Prompt the user to enter location coordinates and return the user-specified coordinates.
*/
private static String getInputLocation() throws IOException {
String inputQuery = "";
System.out.print("Please enter location coordinates (example: 37.42307,-122.08427): ");
BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));
inputQuery = bReader.readLine();
if (inputQuery.length() < 1) {
// Use the string "37.42307,-122.08427" as a default.
inputQuery = "37.42307,-122.08427";
}
return inputQuery;
}
/*
* Prompt the user to enter a location radius and return the user-specified radius.
*/
private static String getInputLocationRadius() throws IOException {
String inputQuery = "";
System.out.print("Please enter a location radius (examples: 5km, 8mi):");
BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));
inputQuery = bReader.readLine();
if (inputQuery.length() < 1) {
// Use the string "5km" as a default.
inputQuery = "5km";
}
return inputQuery;
}
/*
* Prints out all results in the Iterator. For each result, print the
* title, video ID, location, and thumbnail.
*
* @param iteratorVideoResults Iterator of Videos to print
*
* @param query Search query (String)
*/
private static void prettyPrint(Iterator<Video> iteratorVideoResults, String query) {
System.out.println("\n=============================================================");
System.out.println(
" First " + NUMBER_OF_VIDEOS_RETURNED + " videos for search on \"" + query + "\".");
System.out.println("=============================================================\n");
if (!iteratorVideoResults.hasNext()) {
System.out.println(" There aren't any results for your query.");
}
while (iteratorVideoResults.hasNext()) {
Video singleVideo = iteratorVideoResults.next();
Thumbnail thumbnail = singleVideo.getSnippet().getThumbnails().getDefault();
GeoPoint location = singleVideo.getRecordingDetails().getLocation();
System.out.println(" Video Id" + singleVideo.getId());
System.out.println(" Title: " + singleVideo.getSnippet().getTitle());
System.out.println(" Location: " + location.getLatitude() + ", " + location.getLongitude());
System.out.println(" Thumbnail: " + thumbnail.getUrl());
System.out.println("\n-------------------------------------------------------------\n");
}
}
}*
第二个代码，即使使用相同的身份验证方法也能正常工作的代码：
/*
* Copyright (c) 2012 Google Inc.
*
* 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
*
* http://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 com.google.api.services.samples.youtube.cmdline.data;
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.samples.youtube.cmdline.Auth;
import com.google.api.services.youtube.YouTube;
import com.google.api.services.youtube.model.ResourceId;
import com.google.api.services.youtube.model.SearchListResponse;
import com.google.api.services.youtube.model.SearchResult;
import com.google.api.services.youtube.model.Thumbnail;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
/**
* Print a list of videos matching a search term.
*
* @author Jeremy Walker
*/
public class Search {
/**
* Define a global variable that identifies the name of a file that
* contains the developer's API key.
*/
private static final String PROPERTIES_FILENAME = "youtube.properties";
private static final long NUMBER_OF_VIDEOS_RETURNED = 25;
/**
* Define a global instance of a Youtube object, which will be used
* to make YouTube Data API requests.
*/
private static YouTube youtube;
/**
* Initialize a YouTube object to search for videos on YouTube. Then
* display the name and thumbnail image of each video in the result set.
*
* @param args command line args.
*/
public static void main(String[] args) {
// Read the developer key from the properties file.
Properties properties = new Properties();
try {
InputStream in = Search.class.getResourceAsStream("/" + PROPERTIES_FILENAME);
properties.load(in);
} catch (IOException e) {
System.err.println("There was an error reading " + PROPERTIES_FILENAME + ": " + e.getCause()
+ " : " + e.getMessage());
System.exit(1);
}
try {
// This object is used to make YouTube Data API requests. The last
// argument is required, but since we don't need anything
// initialized when the HttpRequest is initialized, we override
// the interface and provide a no-op function.
youtube = new YouTube.Builder(Auth.HTTP_TRANSPORT, Auth.JSON_FACTORY, new HttpRequestInitializer() {
public void initialize(HttpRequest request) throws IOException {
}
}).setApplicationName("youtube-cmdline-search-sample").build();
// Prompt the user to enter a query term.
String queryTerm = getInputQuery();
// Define the API request for retrieving search results.
YouTube.Search.List search = youtube.search().list("id,snippet");
// Set your developer key from the {{ Google Cloud Console }} for
// non-authenticated requests. See:
// {{ https://cloud.google.com/console }}
String apiKey = properties.getProperty("youtube.apikey");
search.setKey(apiKey);
search.setQ(queryTerm);
// Restrict the search results to only include videos. See:
// https://developers.google.com/youtube/v3/docs/search/list#type
search.setType("video");
// To increase efficiency, only retrieve the fields that the
// application uses.
search.setFields("items(id/kind,id/videoId,snippet/title,snippet/thumbnails/default/url)");
search.setMaxResults(NUMBER_OF_VIDEOS_RETURNED);
// Call the API and print results.
SearchListResponse searchResponse = search.execute();
List<SearchResult> searchResultList = searchResponse.getItems();
if (searchResultList != null) {
prettyPrint(searchResultList.iterator(), queryTerm);
}
} catch (GoogleJsonResponseException e) {
System.err.println("There was a service error: " + e.getDetails().getCode() + " : "
+ e.getDetails().getMessage());
} catch (IOException e) {
System.err.println("There was an IO error: " + e.getCause() + " : " + e.getMessage());
} catch (Throwable t) {
t.printStackTrace();
}
}
/*
* Prompt the user to enter a query term and return the user-specified term.
*/
private static String getInputQuery() throws IOException {
String inputQuery = "";
System.out.print("Please enter a search term: ");
BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));
inputQuery = bReader.readLine();
if (inputQuery.length() < 1) {
// Use the string "YouTube Developers Live" as a default.
inputQuery = "YouTube Developers Live";
}
return inputQuery;
}
/*
* Prints out all results in the Iterator. For each result, print the
* title, video ID, and thumbnail.
*
* @param iteratorSearchResults Iterator of SearchResults to print
*
* @param query Search query (String)
*/
private static void prettyPrint(Iterator<SearchResult> iteratorSearchResults, String query) {
System.out.println("\n=============================================================");
System.out.println(
" First " + NUMBER_OF_VIDEOS_RETURNED + " videos for search on \"" + query + "\".");
System.out.println("=============================================================\n");
if (!iteratorSearchResults.hasNext()) {
System.out.println(" There aren't any results for your query.");
}
while (iteratorSearchResults.hasNext()) {
SearchResult singleVideo = iteratorSearchResults.next();
ResourceId rId = singleVideo.getId();
// Confirm that the result represents a video. Otherwise, the
// item will not contain a video ID.
if (rId.getKind().equals("youtube#video")) {
Thumbnail thumbnail = singleVideo.getSnippet().getThumbnails().getDefault();
System.out.println(" Video Id" + rId.getVideoId());
System.out.println(" Title: " + singleVideo.getSnippet().getTitle());
System.out.println(" Thumbnail: " + thumbnail.getUrl());
System.out.println("\n-------------------------------------------------------------\n");
}
}
}
}
API 密钥必须应用于每项 YouTube 服务
可能有效：
search.setKey(apiKey);
SearchListResponse searchResponse = search.execute();
可能不起作用：
VideoListResponse listResponse = listVideosRequest.execute();
失踪
listVideosRequest.setKey(apiKey);
请注意，我无权测试 Java，所以这是一种猜测。
我对以下代码有疑问：我正在尝试使用 youtube API v3 到 运行 简单的地理定位代码（第一个代码），但我一直收到服务错误 403已超出未经身份验证使用的每日限制继续使用需要注册。
我在 youtube.properties 文件中存储了一个有效密钥，并且在 google.console.developpers 页面上激活了 YouTube 数据 API。我不明白这个问题，因为当我 运行 使用相同身份验证系统的更简单的代码（第二代码）时，它可以工作。
第一个代码：无效
/*
* Copyright (c) 2014 Google Inc.
*
* 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
*
* http://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 com.google.api.services.samples.youtube.cmdline.data;
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.util.Joiner;
import com.google.api.services.samples.youtube.cmdline.Auth;
import com.google.api.services.youtube.YouTube;
import com.google.api.services.youtube.model.GeoPoint;
import com.google.api.services.youtube.model.SearchListResponse;
import com.google.api.services.youtube.model.SearchResult;
import com.google.api.services.youtube.model.Thumbnail;
import com.google.api.services.youtube.model.Video;
import com.google.api.services.youtube.model.VideoListResponse;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
/**
* This sample lists videos that are associated with a particular keyword and are in the radius of
* particular geographic coordinates by:
*
* 1. Searching videos with "youtube.search.list" method and setting "type", "q", "location" and
* "locationRadius" parameters.
* 2. Retrieving location details for each video with "youtube.videos.list" method and setting
* "id" parameter to comma separated list of video IDs in search result.
*
* @author Ibrahim Ulukaya
*/
public class GeolocationSearch {
/**
* Define a global variable that identifies the name of a file that
* contains the developer's API key.
*/
private static final String PROPERTIES_FILENAME = "youtube.properties";
private static final long NUMBER_OF_VIDEOS_RETURNED = 25;
/**
* Define a global instance of a Youtube object, which will be used
* to make YouTube Data API requests.
*/
private static YouTube youtube;
/**
* Initialize a YouTube object to search for videos on YouTube. Then
* display the name and thumbnail image of each video in the result set.
*
* @param args command line args.
*/
public static void main(String[] args) {
// Read the developer key from the properties file.
Properties properties = new Properties();
try {
InputStream in = GeolocationSearch.class.getResourceAsStream("/" + PROPERTIES_FILENAME);
properties.load(in);
} catch (IOException e) {
System.err.println("There was an error reading " + PROPERTIES_FILENAME + ": " + e.getCause()
+ " : " + e.getMessage());
System.exit(1);
}
try {
// This object is used to make YouTube Data API requests. The last
// argument is required, but since we don't need anything
// initialized when the HttpRequest is initialized, we override
// the interface and provide a no-op function.
youtube = new YouTube.Builder(Auth.HTTP_TRANSPORT, Auth.JSON_FACTORY, new HttpRequestInitializer() {
public void initialize(HttpRequest request) throws IOException {
}
}).setApplicationName("youtube-cmdline-geolocationsearch-sample").build();
// Prompt the user to enter a query term.
String queryTerm = getInputQuery();
// Prompt the user to enter location coordinates.
String location = getInputLocation();
// Prompt the user to enter a location radius.
String locationRadius = getInputLocationRadius();
// Define the API request for retrieving search results.
YouTube.Search.List search = youtube.search().list("id,snippet");
// Set your developer key from the {{ Google Cloud Console }} for
// non-authenticated requests. See:
// {{ https://cloud.google.com/console }}
String apiKey = properties.getProperty("youtube.apikey");
search.setKey(apiKey);
search.setQ(queryTerm);
search.setLocation(location);
search.setLocationRadius(locationRadius);
// Restrict the search results to only include videos. See:
// https://developers.google.com/youtube/v3/docs/search/list#type
search.setType("video");
// As a best practice, only retrieve the fields that the
// application uses.
//search.setFields("items(id/kind,id/videoId,snippet/title,snippet/thumbnails/default/url)");
search.setFields("items(id/videoId)");
search.setMaxResults(NUMBER_OF_VIDEOS_RETURNED);
// Call the API and print results.
SearchListResponse searchResponse = search.execute();
List<SearchResult> searchResultList = searchResponse.getItems();
List<String> videoIds = new ArrayList<String>();
if (searchResultList != null) {
// Merge video IDs
for (SearchResult searchResult : searchResultList) {
videoIds.add(searchResult.getId().getVideoId());
}
Joiner stringJoiner = Joiner.on(',');
String videoId = stringJoiner.join(videoIds);
// Call the YouTube Data API's youtube.videos.list method to
// retrieve the resources that represent the specified videos.
YouTube.Videos.List listVideosRequest = youtube.videos().list("snippet, recordingDetails").setId(videoId);
VideoListResponse listResponse = listVideosRequest.execute();
List<Video> videoList = listResponse.getItems();
if (videoList != null) {
prettyPrint(videoList.iterator(), queryTerm);
}
}
} catch (GoogleJsonResponseException e) {
System.err.println("There was a service error: " + e.getDetails().getCode() + " : "
+ e.getDetails().getMessage());
} catch (IOException e) {
System.err.println("There was an IO error: " + e.getCause() + " : " + e.getMessage());
} catch (Throwable t) {
t.printStackTrace();
}
}
/*
* Prompt the user to enter a query term and return the user-specified term.
*/
private static String getInputQuery() throws IOException {
String inputQuery = "";
System.out.print("Please enter a search term: ");
BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));
inputQuery = bReader.readLine();
if (inputQuery.length() < 1) {
// Use the string "YouTube Developers Live" as a default.
inputQuery = "YouTube Developers Live";
}
return inputQuery;
}
/*
* Prompt the user to enter location coordinates and return the user-specified coordinates.
*/
private static String getInputLocation() throws IOException {
String inputQuery = "";
System.out.print("Please enter location coordinates (example: 37.42307,-122.08427): ");
BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));
inputQuery = bReader.readLine();
if (inputQuery.length() < 1) {
// Use the string "37.42307,-122.08427" as a default.
inputQuery = "37.42307,-122.08427";
}
return inputQuery;
}
/*
* Prompt the user to enter a location radius and return the user-specified radius.
*/
private static String getInputLocationRadius() throws IOException {
String inputQuery = "";
System.out.print("Please enter a location radius (examples: 5km, 8mi):");
BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));
inputQuery = bReader.readLine();
if (inputQuery.length() < 1) {
// Use the string "5km" as a default.
inputQuery = "5km";
}
return inputQuery;
}
/*
* Prints out all results in the Iterator. For each result, print the
* title, video ID, location, and thumbnail.
*
* @param iteratorVideoResults Iterator of Videos to print
*
* @param query Search query (String)
*/
private static void prettyPrint(Iterator<Video> iteratorVideoResults, String query) {
System.out.println("\n=============================================================");
System.out.println(
" First " + NUMBER_OF_VIDEOS_RETURNED + " videos for search on \"" + query + "\".");
System.out.println("=============================================================\n");
if (!iteratorVideoResults.hasNext()) {
System.out.println(" There aren't any results for your query.");
}
while (iteratorVideoResults.hasNext()) {
Video singleVideo = iteratorVideoResults.next();
Thumbnail thumbnail = singleVideo.getSnippet().getThumbnails().getDefault();
GeoPoint location = singleVideo.getRecordingDetails().getLocation();
System.out.println(" Video Id" + singleVideo.getId());
System.out.println(" Title: " + singleVideo.getSnippet().getTitle());
System.out.println(" Location: " + location.getLatitude() + ", " + location.getLongitude());
System.out.println(" Thumbnail: " + thumbnail.getUrl());
System.out.println("\n-------------------------------------------------------------\n");
}
}
}*
第二个代码，即使使用相同的身份验证方法也能正常工作的代码：
/*
* Copyright (c) 2012 Google Inc.
*
* 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
*
* http://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 com.google.api.services.samples.youtube.cmdline.data;
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.samples.youtube.cmdline.Auth;
import com.google.api.services.youtube.YouTube;
import com.google.api.services.youtube.model.ResourceId;
import com.google.api.services.youtube.model.SearchListResponse;
import com.google.api.services.youtube.model.SearchResult;
import com.google.api.services.youtube.model.Thumbnail;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
/**
* Print a list of videos matching a search term.
*
* @author Jeremy Walker
*/
public class Search {
/**
* Define a global variable that identifies the name of a file that
* contains the developer's API key.
*/
private static final String PROPERTIES_FILENAME = "youtube.properties";
private static final long NUMBER_OF_VIDEOS_RETURNED = 25;
/**
* Define a global instance of a Youtube object, which will be used
* to make YouTube Data API requests.
*/
private static YouTube youtube;
/**
* Initialize a YouTube object to search for videos on YouTube. Then
* display the name and thumbnail image of each video in the result set.
*
* @param args command line args.
*/
public static void main(String[] args) {
// Read the developer key from the properties file.
Properties properties = new Properties();
try {
InputStream in = Search.class.getResourceAsStream("/" + PROPERTIES_FILENAME);
properties.load(in);
} catch (IOException e) {
System.err.println("There was an error reading " + PROPERTIES_FILENAME + ": " + e.getCause()
+ " : " + e.getMessage());
System.exit(1);
}
try {
// This object is used to make YouTube Data API requests. The last
// argument is required, but since we don't need anything
// initialized when the HttpRequest is initialized, we override
// the interface and provide a no-op function.
youtube = new YouTube.Builder(Auth.HTTP_TRANSPORT, Auth.JSON_FACTORY, new HttpRequestInitializer() {
public void initialize(HttpRequest request) throws IOException {
}
}).setApplicationName("youtube-cmdline-search-sample").build();
// Prompt the user to enter a query term.
String queryTerm = getInputQuery();
// Define the API request for retrieving search results.
YouTube.Search.List search = youtube.search().list("id,snippet");
// Set your developer key from the {{ Google Cloud Console }} for
// non-authenticated requests. See:
// {{ https://cloud.google.com/console }}
String apiKey = properties.getProperty("youtube.apikey");
search.setKey(apiKey);
search.setQ(queryTerm);
// Restrict the search results to only include videos. See:
// https://developers.google.com/youtube/v3/docs/search/list#type
search.setType("video");
// To increase efficiency, only retrieve the fields that the
// application uses.
search.setFields("items(id/kind,id/videoId,snippet/title,snippet/thumbnails/default/url)");
search.setMaxResults(NUMBER_OF_VIDEOS_RETURNED);
// Call the API and print results.
SearchListResponse searchResponse = search.execute();
List<SearchResult> searchResultList = searchResponse.getItems();
if (searchResultList != null) {
prettyPrint(searchResultList.iterator(), queryTerm);
}
} catch (GoogleJsonResponseException e) {
System.err.println("There was a service error: " + e.getDetails().getCode() + " : "
+ e.getDetails().getMessage());
} catch (IOException e) {
System.err.println("There was an IO error: " + e.getCause() + " : " + e.getMessage());
} catch (Throwable t) {
t.printStackTrace();
}
}
/*
* Prompt the user to enter a query term and return the user-specified term.
*/
private static String getInputQuery() throws IOException {
String inputQuery = "";
System.out.print("Please enter a search term: ");
BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));
inputQuery = bReader.readLine();
if (inputQuery.length() < 1) {
// Use the string "YouTube Developers Live" as a default.
inputQuery = "YouTube Developers Live";
}
return inputQuery;
}
/*
* Prints out all results in the Iterator. For each result, print the
* title, video ID, and thumbnail.
*
* @param iteratorSearchResults Iterator of SearchResults to print
*
* @param query Search query (String)
*/
private static void prettyPrint(Iterator<SearchResult> iteratorSearchResults, String query) {
System.out.println("\n=============================================================");
System.out.println(
" First " + NUMBER_OF_VIDEOS_RETURNED + " videos for search on \"" + query + "\".");
System.out.println("=============================================================\n");
if (!iteratorSearchResults.hasNext()) {
System.out.println(" There aren't any results for your query.");
}
while (iteratorSearchResults.hasNext()) {
SearchResult singleVideo = iteratorSearchResults.next();
ResourceId rId = singleVideo.getId();
// Confirm that the result represents a video. Otherwise, the
// item will not contain a video ID.
if (rId.getKind().equals("youtube#video")) {
Thumbnail thumbnail = singleVideo.getSnippet().getThumbnails().getDefault();
System.out.println(" Video Id" + rId.getVideoId());
System.out.println(" Title: " + singleVideo.getSnippet().getTitle());
System.out.println(" Thumbnail: " + thumbnail.getUrl());
System.out.println("\n-------------------------------------------------------------\n");
}
}
}
}
API 密钥必须应用于每项 YouTube 服务
可能有效：
search.setKey(apiKey);
SearchListResponse searchResponse = search.execute();
可能不起作用：
VideoListResponse listResponse = listVideosRequest.execute();
失踪
listVideosRequest.setKey(apiKey);
请注意，我无权测试 Java，所以这是一种猜测。