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[英]How to search specific HashTags in twitter API 1.1 using java
[英]How to search for tweets using twitter API 1.1 and java
Twitter API已從1.0更改為1.1。 現在,對於任何類型的查詢,都必須進行授權。 我正在使用java來獲取推文。 任何人都可以給我一些使用OAuth身份驗證獲取推文的java示例。
使用twitter4j api是可能的。 http://twitter4j.org/en/ 。 下面給出一個例子
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);
}
當我作為Java類運行時,此示例獨立工作。 但是當我在JSP中添加此代碼以便在webapp中進行測試時,它無法正常工作。 它向我顯示以下異常
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)
問題是您正在多次設置使用者密鑰和令牌,如異常所示:
java.lang.IllegalStateException:已設置的使用者密鑰/秘密對。
之所以發生這種情況是因為TwitterFactory.getInstance()
返回了Twitter
的單例,然后每次向Servlet發出請求時都會調用setOAuthConsumer
和setOAuthAccessToken
。
您需要確保只配置一次Twitter
實例,而不是每次請求時都配置。
實現這一目標的一種方法是通過使用TwitterFactory.getInstance(AccessToken)
要求TwitterFactory
為您提供經過身份驗證的Twitter
實例:
final AccessToken accessToken = new AccessToken("Your-Access-Token", "Your-Access-Token-Secret");
final Twitter twitter = TwitterFactory.getInstance(token);
...
這種工廠方法的另一個好處是它可以為您返回一個緩存的,經過身份驗證的Twitter
實例。
您可以使用codebird js庫進行推文搜索。 您只需要在Twitter上創建一個應用程序並記下以下內容:
從GitHub的庫下載codebird JS庫在這里 :
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
);
我使用本教程使用帶有OAuth身份驗證的twitter api 1.1搜索推文
我已經修改了代碼以實現我的可用性而且它沒有使用twitter4j ,這在目前很好,因為OA 構建中沒有OAuth搜索(我在某處找不到該位置的地方)
還添加了獲取Twitter時間線
代碼在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
是一個包含String text, String fromUser, String expandedURL, String createdAt
的Pojo類String text, String fromUser, String expandedURL, String createdAt
(這是我的要求)
希望這可以幫助 :)
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