Twitter API已从1.0更改为1.1。现在,对于任何类型的查询,都必须经过授权。我正在使用java获取推文。谁能给我一些使用OAuth认证获取tweet的java示例?
更新
使用twitter4j api是可能的。http://twitter4j.org/en/。下面是一个例子
Twitter twitter = new TwitterFactory().getInstance();
AccessToken accessToken = new AccessToken("Your-Access-Token", "Your-Access-Token-Secret");
twitter.setOAuthConsumer("Consumer-Key", "Consumer-Key-Secret");
twitter.setOAuthAccessToken(accessToken);
try {
Query query = new Query("#IPL");
QueryResult result;
result = twitter.search(query);
List<Status> tweets = result.getTweets();
for (Status tweet : tweets) {
System.out.println("@" + tweet.getUser().getScreenName() + " - " + tweet.getText());
}
}
catch (TwitterException te) {
te.printStackTrace();
System.out.println("Failed to search tweets: " + te.getMessage());
System.exit(-1);
}
这里的问题当我作为Java类运行时,此示例独立工作。但是,当我在JSP中添加此代码以在web应用程序中进行测试时,它不起作用。它显示了以下异常
SEVERE: Servlet.service() for servlet [jsp] in context with path [/mypub] threw exception [java.lang.IllegalStateException: consumer key/secret pair already set.] with root cause
java.lang.IllegalStateException: consumer key/secret pair already set.
at twitter4j.TwitterBaseImpl.setOAuthConsumer(TwitterBaseImpl.java:264)
at com.me.framework.tag.core.TweetFetch.doTag(TweetFetch.java:50)
at org.apache.jsp.template.test_jsp._jspx_meth_wf_002dcore_005ftweetFetch_005f0(test_jsp.java:100)
at org.apache.jsp.template.test_jsp._jspService(test_jsp.java:74)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
问题是您多次设置消费者秘密和令牌,如异常所示:
. lang。
用户密钥/秘密对已经设置。
它正在发生,因为TwitterFactory.getInstance()
正在返回Twitter
的单例,这是然后有setOAuthConsumer
和setOAuthAccessToken
调用它每次请求你的Servlet。
您需要确保只配置一次Twitter
实例,而不是每次发出请求时都配置。
实现此目的的一种方法是通过使用TwitterFactory.getInstance(AccessToken)
:
TwitterFactory
向您提供Twitter
的已验证实例。final AccessToken accessToken = new AccessToken("Your-Access-Token", "Your-Access-Token-Secret");
final Twitter twitter = TwitterFactory.getInstance(token);
...
这个工厂方法的另一个好处是它可以为您返回一个缓存的、经过验证的Twitter
实例。
你可以使用codebird js库进行tweet搜索。你只需要在Twitter上创建一个应用程序,并记下以下内容:
- <
- 消费者关键/gh>
- 消费者密钥
- 访问令牌
- 访问令牌秘密
从GitHub仓库下载codebird js库:
用法:
var cb = new Codebird;
cb.setConsumerKey('YOURKEY', 'YOURSECRET');
cb.setToken('YOURTOKEN', 'YOURTOKENSECRET');
cb.__call(
'oauth2_token',
{},
function (reply) {
var bearer_token = reply.access_token;
}
);
cb.__call(
'search_tweets',
{
q : "your query which you want to search",
from : twitter_user
},
function (data)
{
console.log(data);
},
true // this parameter required
);
我使用本教程使用带有OAuth身份验证的twitter api 1.1搜索tweet
我已经修改了我的可用性代码,它不使用twitter4j,这是很好的,因为OAuth搜索在RC构建中不可用(我读到它的某个地方无法找到目前的位置)
还添加了获取twitter时间轴
代码在Groovy
中TweetsHelper tweetsHelper = new TweetsHelper()
def bearerToken=tweetsHelper.requestBearerToken(TWITTER_AUTH_URL)
List<TweetsInfo> tweets=tweetsHelper.fetchTimelineTweet(bearerToken)
private final def TWITTER_HOST = "api.twitter.com"
private final def TWITTER_AUTH_URL = "https://api.twitter.com/oauth2/token"
private final def TWITTER_URL = "https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=INFAsupport&count=200"
private HttpsURLConnection getHTTPSConnection(String method,String endpointUrl){
HttpsURLConnection connection = null
URL url = new URL(endpointUrl)
connection = (HttpsURLConnection) url.openConnection()
connection.setDoOutput(true)
connection.setDoInput(true)
connection.setRequestMethod(method)
connection.setRequestProperty("Host", TWITTER_HOST)
connection.setRequestProperty("User-Agent", TWITTER_HANDLE)
connection.setUseCaches(false)
return connection
}
//Fetch Bearertoken for getting tweets
public String requestBearerToken(String endPointUrl) throws IOException {
String encodedCredentials = encodeKeys()
HttpsURLConnection connection = null
try {
connection = getHTTPSConnection("POST",endPointUrl)
connection.setRequestProperty("Authorization", "Basic " + encodedCredentials)
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8")
connection.setRequestProperty("Content-Length", "29")
connection.setUseCaches(false)
}
catch (MalformedURLException e) {
throw new IOException("Invalid endpoint URL specified.", e)
}
finally {
if (connection != null) {
connection.disconnect()
}
}
writeRequest(connection, "grant_type=client_credentials")
JsonSlurper js=new JsonSlurper()
def result=js.parseText(readResponse(connection))
String tokenType = result?.token_type
String token = result?.access_token
return ((tokenType.equals("bearer")) && (token != null)) ? token : ""
}
//Search tweets
public List<TweetsInfo> fetchQueriedTweets(def bearerToken) throws IOException {
HttpsURLConnection connection = null
def dataCleanser = new DataCleanser()
try {
connection = getHTTPSConnection("GET",TWITTER_URL)
connection.setRequestProperty("Authorization", "Bearer " + bearerToken)
}
catch (MalformedURLException e) {
throw new IOException("Invalid endpoint URL specified.", e)
}
finally {
if (connection != null) {
connection.disconnect()
}
}
List<TweetsInfo> tweets= new ArrayList<TweetsInfo>()
try{
JSONObject obj = (JSONObject)JSONValue.parse(readResponse(connection))
JSONArray objArray = (JSONArray)obj.get(TWEET_STATUSES)
if (objArray != null) {
for(int i=0;i<objArray.length();i++){
String text = dataCleanser.escapeQuotes(((JSONObject)objArray.get(i)).get(TWEET_TEXT).toString())
String createdAt = DateUtils.convertToUTC(parseTweetDate(((JSONObject)objArray.get(i)).get(TWEET_CREATED_AT).toString()))
String fromUser = ((JSONObject)objArray.get(i)).get(TWEET_USER).get(TWEET_NAME).toString()
String expandedURL = ((JSONObject)objArray.get(i)).get(TWEET_ENTITIES).get(TWEET_URLS).get(0).get(TWEET_EXPANDED_URL).toString()
TweetsInfo tweet=new TweetsInfo(text,fromUser,expandedURL,createdAt)
tweets.push(tweet)
}
}
}
catch(Exception e){
log.info "Exception in TweetsHelper $e"
}
return tweets
}
//Fetch Twitter timeline
public List<TweetsInfo> fetchTimelineTweet(def bearerToken) throws IOException {
HttpsURLConnection connection = null
List<TweetsInfo> tweets= new ArrayList<TweetsInfo>()
def dataCleanser = new DataCleanser()
try {
connection = getHTTPSConnection("GET",TWITTER_URL)
connection.setRequestProperty("Authorization", "Bearer " + bearerToken)
}
catch (MalformedURLException e) {
throw new IOException("Invalid endpoint URL specified.", e)
}
finally {
if (connection != null) {
connection.disconnect()
}
}
JsonSlurper js=new JsonSlurper()
try{
def result=js.parseText(readResponse(connection))
result?.each{tweet->
String text = tweet?.text
String createdAt = DateUtils.convertToUTC(parseTweetDate(tweet?.created_at))
String fromUser = tweet?.user?.name
String expandedURL = tweet?.entities?.urls[0]?.expanded_url
if(validTweetForAWeek(createdAt)){
TweetsInfo tweetinfo=new TweetsInfo(text,fromUser,expandedURL,createdAt)
tweets.push(tweetinfo)
}
}
}
catch(Exception e){
log.info "Exception in TweetsHelper $e"
}
return tweets
}
TweetsInfo
是一个Pojo类与String text, String fromUser, String expandedURL, String createdAt
(这是我的要求)
希望这对你有帮助