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import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MetObservationsGetter {
public static void main(String[] args) {
String sosUrl = "https://opendap.co-ops.nos.noaa.gov/ioos-dif-sos/SOS";
String baseUrl = sosUrl + "?service=SOS&request=GetObservation&version=1.0.0&observedProperty=";
String saveToYourLocalDir = "C:\\temp\\sosdata\\";
String products[] = {"air_temperature", "winds", "rain_fall"};
String stationsIds[] = {"8454049", "8637689", "9754228", "9759394"};
String dates[] = {"2011-12-01", "2012-03-21"};
String responseFormat = "csv";
String dateTimeStr;
String url;
URL dataUrl;
String fileName;
try {
List dtList = getDateTimeList(dates);
String responseMIMEType = getResponseMIMEType(responseFormat);
for (int i = 0; i < products.length; i++) {
if (!isValidObservedProperty(products[i])) {
throw new IOException(" Wrong Observed Property: " + products[i] + ", please enter a valid observed property.");
}
for (int j = 0; j < stationsIds.length; j++) {
if (!isValidNwlonStationId(stationsIds[j])) {
throw new IOException(" Wrong Station ID: " + stationsIds[j] + ", please enter a valid station ID.");
}
for (int k = 0, size = dtList.size(); k < size; k++) {
dateTimeStr = (String) dtList.get(k);
url = baseUrl + products[i] + "&offering=urn:ioos:station:NOAA.NOS.CO-OPS:"
+ stationsIds[j] + "&responseFormat=" + urlEncode(responseMIMEType) + "&eventTime=" + dateTimeStr;
dataUrl = new URL(url);
fileName = getFileName(products[i], stationsIds[j], dateTimeStr, responseFormat, saveToYourLocalDir);
getResource(dataUrl, fileName);
}
}
}
} catch (Exception e) {
System.err.println("ERROR: ******* " + e.getMessage());
}
}
public static boolean isValidNwlonStationId(String stationId) {
Pattern regexWL = Pattern.compile("^[1-9][0-9]{6}$");
if (stationId == null) {
return false;
} else {
stationId = stationId.trim();
Matcher mWL = regexWL.matcher(stationId);
if (mWL.matches()) {
return true;
} else {
return false;
}
}
}
public static List getDateTimeList(String dates[]) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US);
String startTime = "00:00:00";
String endTime = "23:59:00";
int MAX_RETRIEVAL_DAYS = 31; long difference;
double diffDays;
Date start;
Date end;
Date tempStart;
Date tempEnd;
String dateTimeStr;
List dateTimeList = new ArrayList();
try {
start = sdf.parse(dates[0] + " " + startTime);
end = sdf.parse(dates[1] + " " + endTime);
if (end.before(start)) {
throw new java.text.ParseException(" Wrong dates order, end date must be later than begin date.", -1);
}
difference = end.getTime() - start.getTime();
diffDays = difference / (1000 * 60 * 60 * 24);
if (diffDays > MAX_RETRIEVAL_DAYS) {
tempStart = start;
for (int d = 0; d <= diffDays; d += MAX_RETRIEVAL_DAYS) {
tempEnd = sdf.parse(addDays(MAX_RETRIEVAL_DAYS - 1, tempStart) + " " + endTime);
if (tempEnd.after(end)) {
tempEnd = end;
}
dateTimeStr = sdf.format(tempStart).replace(" ", "T") + "Z" + "/" + sdf.format(tempEnd).replace(" ", "T") + "Z";
dateTimeList.add(dateTimeStr);
tempStart = sdf.parse(addDays(1, tempEnd) + " " + startTime);
}
} else {
dateTimeStr = sdf.format(start).replace(" ", "T") + "Z" + "/" + sdf.format(end).replace(" ", "T") + "Z";
dateTimeList.add(dateTimeStr);
}
} catch (ParseException ex) {
System.err.println("ERROR: ******* " + ex.toString());
}
return dateTimeList;
}
public static String addDays(int dayOffset, Date dateTime) {
Calendar calender = new GregorianCalendar();
calender.setTime(dateTime);
calender.add(Calendar.DATE, dayOffset);
int month = calender.get(Calendar.MONTH) + 1;
int day = calender.get(Calendar.DAY_OF_MONTH);
int year = calender.get(Calendar.YEAR);
StringBuilder buffer = new StringBuilder(15);
buffer.append(year);
buffer.append('-');
if (month < 10) {
buffer.append('0');
}
buffer.append(month);
buffer.append('-');
if (day < 10) {
buffer.append('0');
}
buffer.append(day);
return buffer.toString();
}
private static String getResponseMIMEType(String formatOption) throws IOException {
String responseMIMEType = "text/csv";
if (formatOption.equalsIgnoreCase("csv")) {
responseMIMEType = "text/csv";
} else if (formatOption.equalsIgnoreCase("tsv")) {
responseMIMEType = "text/tab-separated-values";
} else if (formatOption.equalsIgnoreCase("kml")) {
responseMIMEType = "application/vnd.google-earth.kml+xml";
} else if (formatOption.equalsIgnoreCase("xml")) {
responseMIMEType = "text/xml;schema=\"ioos/0.6.1\"";
} else {
throw new IOException(" Wrong Response Format: please enter a valid response format string.");
}
return responseMIMEType;
}
public static boolean isValidObservedProperty(String input) {
boolean isMatch = false;
List acceptObservedProperties = new ArrayList();
acceptObservedProperties.add("air_temperature");
acceptObservedProperties.add("air_pressure");
acceptObservedProperties.add("sea_water_electrical_conductivity");
acceptObservedProperties.add("sea_water_salinity");
acceptObservedProperties.add("sea_water_temperature");
acceptObservedProperties.add("winds");
acceptObservedProperties.add("rain_fall");
acceptObservedProperties.add("relative_humidity");
if (input != null) {
if (input.length() == 0) {
isMatch = false;
} else {
String s = input.toLowerCase();
for (int i = 0, size = acceptObservedProperties.size(); i < size; i++) {
if (acceptObservedProperties.get(i).toString().equals(s)) {
isMatch = true;
break;
}
}
}
}
return isMatch;
}
private static String urlEncode(String inString) {
if (inString != null) {
inString = inString.replace("/", "%2F");
inString = inString.replace("+", "%2B");
}
return inString;
}
public static String getFileName(String product, String stationId, String dateTime, String responseFormat, String saveToYourLocalDir) {
String dateTimeStr = dateTime.replace(":", "-").replace("/", "_");
String fileName = saveToYourLocalDir + product + "_" + stationId + "_" + dateTimeStr + "." + responseFormat.toLowerCase();
return fileName;
}
public static void getResource(URL url, String fileName) {
HttpURLConnection huc = null;
BufferedInputStream in = null;
FileOutputStream file;
BufferedOutputStream out = null;
try {
huc = (HttpURLConnection) url.openConnection();
huc.setAllowUserInteraction(false);
huc.setDoInput(true);
huc.setDoOutput(false);
huc.setUseCaches(false);
huc.setReadTimeout(30000);
huc.connect();
in = new BufferedInputStream(huc.getInputStream());
file = new FileOutputStream(fileName);
out = new BufferedOutputStream(file);
int len;
byte[] data = new byte[1024];
while ((len = in.read(data, 0, 1024)) >= 0) {
out.write(data, 0, len);
}
out.flush();
out.close();
in.close();
huc.disconnect();
Thread.sleep(4000);
} catch (InterruptedException iex) {
System.err.println("ERROR: ******* " + iex.toString());
} catch (IOException ex) {
System.err.println("ERROR: ******* " + ex.toString());
} finally {
try {
in.close();
out.close();
huc.disconnect();
} catch (IOException ex) {
System.err.println("ERROR: ******* " + ex.toString());
}
}
}
}
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