[Httpunit-commit] SF.net SVN: httpunit:[1072] trunk/httpunit/examples/GoogleMapsExample.java
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[Httpunit-commit] SF.net SVN: httpunit:[1072] trunk/httpunit/examples/GoogleMapsExample.java
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From: <wol...@us...> - 2011-01-10 16:08:04
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Revision: 1072
http://httpunit.svn.sourceforge.net/httpunit/?rev=1072&view=rev
Author: wolfgang_fahl
Date: 2011-01-10 16:07:57 +0000 (Mon, 10 Jan 2011)
Log Message:
-----------
fixed to use Google Maps direction API
Modified Paths:
--------------
trunk/httpunit/examples/GoogleMapsExample.java
Modified: trunk/httpunit/examples/GoogleMapsExample.java
===================================================================
--- trunk/httpunit/examples/GoogleMapsExample.java 2011-01-10 15:30:39 UTC (rev 1071)
+++ trunk/httpunit/examples/GoogleMapsExample.java 2011-01-10 16:07:57 UTC (rev 1072)
@@ -17,8 +17,10 @@
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
+import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
+import java.io.FileReader;
import java.io.FileWriter;
import java.io.StringReader;
import java.io.Writer;
@@ -43,6 +45,13 @@
* get a Route from Google Maps and convert it as a GPX file useable by Garmin
* tracking devices - can be imported in MapSource software then ...
*
+ * As of 2011-01 the old example did not work properly any more. Tricks for
+ * accessing Google Maps via HTML / Javascript can be found at:
+ * http://www.codeproject.com/KB/scripting/Use_of_Google_Map.aspx
+ *
+ * this example was modified to use the Google Directions API now
+ * @see http://code.google.com/intl/de-DE/apis/maps/documentation/directions/
+ *
*/
public class GoogleMapsExample {
@@ -50,7 +59,27 @@
* shall we show debug information?
*/
private boolean DEBUG = true;
+
+ /**
+ * @param filePath the name of the file to open. Not sure if it can accept URLs or just filenames. Path handling could be better, and buffer sizes are hardcoded
+ */
+ private static String readFileAsString(String filePath)
+ throws java.io.IOException{
+ StringBuffer fileData = new StringBuffer(1000);
+ BufferedReader reader = new BufferedReader(
+ new FileReader(filePath));
+ char[] buf = new char[1024];
+ int numRead=0;
+ while((numRead=reader.read(buf)) != -1){
+ String readData = String.valueOf(buf, 0, numRead);
+ fileData.append(readData);
+ buf = new char[1024];
+ }
+ reader.close();
+ return fileData.toString();
+ }
+
/**
* get a Route description as a Garmin compatible GPX file
*
@@ -69,7 +98,17 @@
// http://www.fish-track.com/?page_id=3
Document gpxdoc = convertKMLtoGPX(kml);
// output the result
+ boolean tostdout=filename==null;
+ if (tostdout){
+ File f = File.createTempFile("httpUnit", ".xml");
+ f.deleteOnExit();
+ filename=f.getAbsolutePath();
+ }
xmlSerialize(gpxdoc, filename);
+ if (tostdout){
+ String xmltext=this.readFileAsString(filename);
+ System.out.println(xmltext);
+ }
}
/**
@@ -79,8 +118,7 @@
* @param filename
* @throws Exception
*/
- public void xmlSerialize(Document document, String filename)
- throws Exception {
+ public void xmlSerialize(Document document, String filename) throws Exception {
OutputFormat outputOptions = new OutputFormat();
// outputOptions.setOmitXMLDeclaration(true);
outputOptions.setIndent(4);
@@ -106,8 +144,8 @@
if (subNodes.getLength() != 1) {
if (throwException)
throw new RuntimeException("getSubNode failed for " + parent
- + " expected 1 child with tag name '" + tagName
- + "' but got " + subNodes.getLength());
+ + " expected 1 child with tag name '" + tagName + "' but got "
+ + subNodes.getLength());
else
return null;
}
@@ -115,41 +153,16 @@
}
/**
- * get the latitude and longitude from a route point
+ * convert the given Google Map Direction API file to gpx format
*
- * @param kmlRoutePoint
+ * @param xml
+ * - the xml version of the file
* @return
*/
- public String[] extractCoordinates(Element kmlRoutePoint) {
- String[] result = new String[2];
- Element point = getSubNode(kmlRoutePoint, "Point", false);
- if (point == null)
- return null;
- Element coordNode = getSubNode(point, "coordinates", true);
- String coords = coordNode.getTextContent();
- StringTokenizer coordSplitter = new StringTokenizer(coords, ",", false);
- if (coordSplitter.countTokens() <= 2) {
- throw new RuntimeException("extract coordinates failed for "
- + kmlRoutePoint
- + " expected at least two coordinates but got "
- + coordSplitter.countTokens() + " '" + coords + "'");
- }
- result[0] = coordSplitter.nextToken();
- result[1] = coordSplitter.nextToken();
- return result;
- }
-
- /**
- * convert the given kml file to gpx format
- *
- * @param kml
- * - the kml version of the file
- * @return
- */
- public Document convertKMLtoGPX(String kml) throws Exception {
+ public Document convertKMLtoGPX(String googlexml) throws Exception {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
- Document kmldoc = builder.parse(new InputSource(new StringReader(kml)));
+ Document kmldoc = builder.parse(new InputSource(new StringReader(googlexml)));
Document gpxdoc = builder.newDocument();
String comment = "Converted by httpunit GoogleMapsExample";
gpxdoc.appendChild(gpxdoc.createComment(comment));
@@ -157,7 +170,7 @@
org.w3c.dom.Element root = gpxdoc.createElement("gpx");
root.setAttribute("xmlns", "http://www.topografix.com/GPX/1/1");
root.setAttribute("creator", "KML2GPX Example by BITPlan");
- root.setAttribute("version", "1.1");
+ root.setAttribute("version", "1.2");
gpxdoc.appendChild(root);
org.w3c.dom.Element metadata = gpxdoc.createElement("metadata");
@@ -171,22 +184,22 @@
org.w3c.dom.Element route = gpxdoc.createElement("rte");
root.appendChild(route);
- NodeList routePoints = kmldoc.getElementsByTagName("Placemark");
+ NodeList routePoints = kmldoc.getElementsByTagName("step");
for (int i = 0; i < routePoints.getLength(); i++) {
- Element kmlRoutePoint = (Element) routePoints.item(i);
- String name = getSubNode(kmlRoutePoint, "name", true)
- .getTextContent();
+ Element stepNode = (Element) routePoints.item(i);
+ String instructions = getSubNode(stepNode, "html_instructions", true).getTextContent();
if (DEBUG)
- System.out.println("found route point " + i + ": " + name);
+ System.out.println("found route point " + i + ": " + instructions);
- String coords[] = extractCoordinates(kmlRoutePoint);
- if (coords != null) {
+ Element endNode=getSubNode(stepNode,"end_location",true);
+ Element latNode=getSubNode(endNode, "lat",true);
+ Element lonNode=getSubNode(endNode,"lng",true);
+ if (latNode != null && lonNode!=null) {
org.w3c.dom.Element routePoint = gpxdoc.createElement("rtept");
- routePoint.setAttribute("lon", coords[0]);
- routePoint.setAttribute("lat", coords[1]);
- org.w3c.dom.Element routePointName = gpxdoc
- .createElement("name");
- routePointName.setTextContent(name);
+ routePoint.setAttribute("lon", lonNode.getTextContent());
+ routePoint.setAttribute("lat", latNode.getTextContent());
+ org.w3c.dom.Element routePointName = gpxdoc.createElement("name");
+ routePointName.setTextContent("step"+i);
routePoint.appendChild(routePointName);
route.appendChild(routePoint);
}
@@ -197,11 +210,20 @@
/**
* the url to use
*/
- public static String url = "http://maps.google.com/maps";
+ public static String url = "http://maps.google.com/maps/api/directions/xml";
+
+
/**
- * the directions string to look for
+ * error handling in case the Google Maps WebPage has changed
+ *
+ * @throws Exception
*/
- public static String directions = "directions";
+ public void notifyGoogleMapsHasChanged(String msg) throws Exception {
+ throw new Exception(
+ "GoogleMaps lookupForm at "
+ + msg
+ + "\n has changed - please notify the author of this example via the httpunit-develop mailing list");
+ }
/**
* get a route from google maps with the given start and destination points
@@ -219,57 +241,41 @@
// Obtain the main page on the google maps web site
WebRequest request = new GetMethodWebRequest(url);
- request.setParameter("output", "html");
- WebResponse response = wc.getResponse(request);
- if (withDisplay && DEBUG)
- BrowserDisplayer.showResponseInBrowser(response);
-
- // find the link which contains the string for directions and click it
- WebLink directionsLink = response.getFirstMatchingLink(
- WebLink.MATCH_CONTAINED_TEXT, directions);
- if (directionsLink == null) {
- System.err.println("could not find " + directions + " in response");
- if (DEBUG)
- BrowserDisplayer.showResponseInBrowser(response);
- System.exit(1);
- }
- response = directionsLink.click();
- if (withDisplay && DEBUG)
- BrowserDisplayer.showResponseInBrowser(response);
- WebForm lookupForm = response.getFormWithID("q_form");
- if (lookupForm == null) {
- throw new Exception(
- "GoogleMaps lookupForm at "
- + request.toString()
- + "\n has changed - please notify the author if this example via the httpunit-develop mailing list");
- }
- request = lookupForm.getRequest();
- request.setParameter("saddr", startPoint);
- request.setParameter("daddr", destPoint);
- response = wc.getResponse(request);
- if (withDisplay)
- BrowserDisplayer.showResponseInBrowser(response);
- if (asKML) {
- // request.setParameter("output", "kml");
- FormParameter parameter = lookupForm.getParameter("output");
- FormControl outputControl = parameter.getControl();
- outputControl.setAttribute("value", "kml");
+ request.setParameter("origin", startPoint);
+ request.setParameter("destination", destPoint);
+ request.setParameter("sensor", "false");
+ if (DEBUG)
+ System.out.println("requesting "+url+"?"+request.getQueryString());
+ WebResponse response=null;
+ try {
response = wc.getResponse(request);
- if (withDisplay && DEBUG)
- BrowserDisplayer.showResponseInBrowser(response);
+ } catch (Throwable th) {
+ String[] paramnames = request.getRequestParameterNames();
+ System.err.print("valid parameter names are: ");
+ String delim = "";
+ for (int i = 0; i < paramnames.length; i++) {
+ System.err.print(delim + i + ":" + paramnames[i]);
+ delim = ",";
+ }
+ System.err.println();
+ this.notifyGoogleMapsHasChanged(request.toString() + ":"
+ + th.getMessage());
}
+ //if (withDisplay)
+ // BrowserDisplayer.showResponseInBrowser(response);
return (response.getText());
}
/**
- * get the distance between two given locations
+ * get the distance between two given locations from the Google Maps API xml
+ * file
*
* @param
*/
public String getDistance(String startPoint, String endPoint,
boolean withDisplay) throws Exception {
- String route = getRouteFromGoogleMaps(startPoint, endPoint,
- withDisplay, false);
+ String route = getRouteFromGoogleMaps(startPoint, endPoint, withDisplay,
+ false);
String[] driveLocale = { "Driving directions", "Route" };
String[] unitLocale = { "mi", "km" };
for (int i = 0; i < driveLocale.length; i++) {
@@ -303,20 +309,18 @@
try {
if (params.length < 3) {
System.out
- .println("Usage: java RouteAsGPX [from] [to] ([filename]|'distance') [nodisplay]");
+ .println("Usage: java RouteAsGPX [from] [to] [filename] [nodisplay]");
System.out
.println(" e.g. java RouteAsGPX sfo CA-94526 sfoexample.gpx");
System.out
.println(" to get the route as a Garmin compatible GPX file");
- System.out
- .println(" e.g. java RouteAsGPX sfo CA-94526 distance");
- System.out.println(" to calculate the distance");
- String[] defaultParams = { "sfo", "CA-94526", "distance" };
+ System.out.println(" e.g. java RouteAsGPX sfo CA-94526");
+ System.out.println(" to output to stdout/screen");
+ String[] defaultParams = { "sfo", "CA-94526", };
// defaultParams={"sfo","CA-94526","sfoexample.gpx"};
params = defaultParams;
System.out.println("will demonstrate usage with the route "
- + defaultParams[0] + " - " + defaultParams[1]
- + " and store to " + defaultParams[2]);
+ + defaultParams[0] + " - " + defaultParams[1] + " to stdout ");
}
/**
* This is how to use the example in germany:
@@ -331,17 +335,10 @@
withDisplay = false;
String startPoint = params[0];
String endPoint = params[1];
- String filename = params[2];
- if (filename.equals("distance")) {
- String distanceS = routeAsGPX.getDistance(startPoint, endPoint,
- withDisplay);
- // String distanceS=NumberFormat.getInstance().format(distance);
- System.out.println("The distance between " + startPoint
- + " and " + endPoint + " is " + distanceS);
- } else {
- routeAsGPX.getRouteAsGPX(startPoint, endPoint, filename,
- withDisplay);
- }
+ String filename = null;
+ if (params.length>2)
+ filename=params[2];
+ routeAsGPX.getRouteAsGPX(startPoint, endPoint, filename, withDisplay);
} catch (Exception e) {
System.err.println("Exception: " + e);
e.printStackTrace();
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