protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException {
response.setContentType("text/plain");
PrintWriter writer = response.getWriter();
String q = request.getParameter("q");
if (q == null) {
writer.println("ERROR: q has no value.");
writer.close();
return;
}
ResultBundle[] results = Map.getResults(q.toLowerCase());
writer.println("STATUS: " + results.length + " results for the query " + q + "!");
for (ResultBundle rb : results) {
JSONObject j = new JSONObject();
j.put("thumbnail", rb.getThumbnail());
j.put("title", rb.getTitle());
j.put("description", rb.getDescription());
j.put("url", rb.getUrl());
writer.println(j.toString());
}
writer.close();
}
/**
* Parses a text file of JSONs into an array of tweets
*
* @param textFile The textfile containing the JSONs
*/
public parseJSON() {
// get folder paths
String currentDir = System.getProperty("user.dir");
String root = currentDir;
String textFile = root + "/tweet_input/tweets.txt";
String outputFolderF1 = root + "/tweet_output/f1.txt";
String outputFolderF2 = root + "/tweet_output/f2.txt";
int numTweets = 0;
int numGoodTweets = 0;
hashtagEdges hashEdges = new hashtagEdges();
// try objects
try {
// create a reader object for tweet's textfile and read-in first line
BufferedReader reader = new BufferedReader(new FileReader(textFile));
String currentJSON = reader.readLine();
// System.out.println(textFile);
// initate a writer object with the outputFolder name
PrintWriter writerF1 = new PrintWriter(outputFolderF1, "UTF-8");
PrintWriter writerF2 = new PrintWriter(outputFolderF2, "UTF-8");
// create an array list to save parsedTweets and declare problem variables
List<parsedTweet> tweetList = new ArrayList<parsedTweet>();
String tweetText, tweetTime;
JSONObject objJSON;
String[] hashArray;
parsedTweet tweetObj;
float currentAverage;
while (currentJSON != null) {
try {
objJSON = new JSONObject(currentJSON);
// if the JSON has a text and time stamp, process it
numTweets = numTweets + 1;
if (objJSON.has("created_at") && objJSON.has("text")) {
// get timestamp and text from JSON object
tweetTime = objJSON.getString("created_at");
tweetText = objJSON.getString("text");
// create a tweet object and add it to folder
tweetObj = new parsedTweet(tweetTime, tweetText, currentJSON);
tweetList.add(tweetObj);
// update hashObjet
hashArray = tweetObj.hashtags.toArray(new String[tweetObj.hashtags.size()]);
currentAverage = hashEdges.updateEdges(hashArray, tweetTime);
// write correctly-formated cleen-tweet to output folder
writerF1.println(tweetObj.formatTweet());
numGoodTweets = numGoodTweets + 1;
writerF2.format("%.2f%n", currentAverage);
}
} catch (Exception e) {
System.out.println("Error in parseJSON - 1");
e.printStackTrace();
}
// read next line (which has the next JSON object)
currentJSON = reader.readLine();
}
writerF1.close();
writerF2.close();
} catch (Exception e) {
System.out.println("Error in parseJSON - 2");
e.printStackTrace();
}
}
/** @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// TODO Auto-generated method stub
PrintWriter out = response.getWriter();
String id = request.getParameter("hashID");
JSONObject result = new JSONObject();
if (id != null && id.trim().isEmpty()) {
response.setContentType("text/plain");
response.setStatus(400);
out.println("Empty hash ID");
return;
}
Connection conn = null;
Statement st = null;
ResultSet rs = null;
String password;
try {
// Read the SQL password from a file
BufferedReader reader = null;
try {
InputStream inputStream = getClass().getClassLoader().getResourceAsStream("SQLpw.txt");
reader = new BufferedReader(new InputStreamReader(inputStream));
password = reader.readLine();
} catch (NullPointerException e) {
e.getStackTrace();
password = "";
}
// create a mysql database connection
String myDriver = "com.mysql.jdbc.Driver";
String myUrl = "jdbc:mysql://localhost/lodstories";
Class.forName(myDriver);
conn = DriverManager.getConnection(myUrl, "root", password);
st = conn.createStatement();
rs = st.executeQuery("SELECT hash,title,author FROM hash_objects where id='" + id + "'");
if (!rs.next()) {
response.setContentType("text/plain");
response.setStatus(400);
out.println("Error retrieving hash object");
return;
}
result.put("hash", rs.getString("hash"));
result.put("title", rs.getString("title"));
result.put("author", rs.getString("author"));
// result.put("path", rs.getString("path"));
// result.put("rating", rs.getInt("rating"));
// Update the lastAccessed field
st.executeUpdate(
"UPDATE hash_objects SET lastAccessed=CURRENT_TIMESTAMP() WHERE id='" + id + "'");
response.setContentType("application/json");
response.setCharacterEncoding("UTF-8");
out.println(result);
} catch (ClassNotFoundException e) {
System.err.println("Could not connect to driver!");
System.err.println(e.getMessage());
} catch (SQLException ex) {
System.err.println(
"SQLException: "
+ ex.getMessage()
+ ", SQLState: "
+ ex.getSQLState()
+ "VendorError: "
+ ex.getErrorCode());
} catch (JSONException ex) {
ex.printStackTrace();
} finally {
if (conn != null) {
try {
conn.close();
} catch (SQLException ex) {
ex.printStackTrace();
}
}
if (st != null) {
try {
st.close();
} catch (SQLException ex) {
ex.printStackTrace();
}
}
if (rs != null) {
try {
rs.close();
} catch (SQLException ex) {
ex.printStackTrace();
}
}
}
}