Develop Reference

How to get absolute path of a document and file from Google Drive Using Java Drive Rest V2 API?

I'm working on Google Drive Integration using Java Drive Rest V2 API, I'm able to get most of the document/file metadata properties except path of the document/file.
I referred following StackOverflow questions as well:
How to get full file path from google drive using java
What's the right way to find files by “full path” in Google Drive API v2
In Both links solutions indicate that I have to create a separate method to achieve this requirement, It means there is no direct method provided by Drive Rest V2 API to get file path.
Please guide me and suggest your suggestion on this.
Thank you,
Arpit

Sharing my solution which will be helpful to others :)...
After several google searches and from Google Drive Documentation for Java Drive Rest V2 API, I got to know that there is no method to call/get the full file path.
So I created following two custom method to achieve my question solution:
"getFilePath(drive, file)" with String return type.
"getfoldersList(drive, parentReferencesList, folderList)" with List of String return type.
Below is the Code Snippet
public static void main(String[] args) throws IOException {
// Build a new authorized API client service.
Drive service = getDriveService();
try {
// Print the file path and name.
FileList result = service.files().list().execute();
List<File> files = result.getItems();
if (files == null || files.size() == 0) {
System.out.println("No files found.");
} else {
System.out.println("Files:");
for (File file : files) {
if (!(file.getMimeType().contains("folder"))) {
String filePath = null;
if (!(file.getParents().isEmpty())) {
filePath = getFilePath(service, file);
}
System.out.println("path: " + filePath);
System.out.println("name: " + file.getTitle());
System.out.println();
}
}
System.out.println("== END ==");
}
} catch (Exception e) {
System.out.println(e);
}
}
private static String getFilePath(Drive drive, File file) throws IOException {
String folderPath = "";
String fullFilePath = null;
List<ParentReference> parentReferencesList = file.getParents();
List<String> folderList = new ArrayList<String>();
List<String> finalFolderList = getfoldersList(drive, parentReferencesList, folderList);
Collections.reverse(finalFolderList);
for (String folder : finalFolderList) {
folderPath += "/" + folder;
}
fullFilePath = folderPath + "/" + file.getTitle();
return fullFilePath;
}
private static List<String> getfoldersList(Drive drive, List<ParentReference> parentReferencesList, List<String> folderList) throws IOException {
for (int i = 0; i < parentReferencesList.size(); i++) {
String id = parentReferencesList.get(i).getId();
File file = drive.files().get(id).execute();
folderList.add(file.getTitle());
if (!(file.getParents().isEmpty())) {
List<ParentReference> parentReferenceslist2 = file.getParents();
getfoldersList(drive, parentReferenceslist2, folderList);
}
}
return folderList;
}
--
Thanks,
Arpit Bora

Try using the Parents.get. A successful request returns a link to both parent and the file itself. Here's a sample response:
{
"kind": "drive#parentReference",
"id": "0Bw-w9jw2bwglbzlvMVh2cll2dmM",
"selfLink": "https://www.googleapis.com/drive/v2/files/1-ABCDEzyvp9NFmWz7h6ssgkTKHytO1Nq4SNIboDW8A/parents/0Bw-w9jw2bwglbzlvMVh2cll2dmM",
"parentLink": "https://www.googleapis.com/drive/v2/files/ABCDEjw2bwglbzlvMVh2cll2dmM",
"isRoot": false
}
Here's the JAVA implementation from the docs:
private static boolean isFileInFolder(Drive service, String folderId,
String fileId) throws IOException {
try {
service.parents().get(fileId, folderId).execute();
} catch (HttpResponseException e) {
if (e.getStatusCode() == 404) {
return false;
} else {
System.out.println("An error occured: " + e);
throw e;
}
} catch (IOException e) {
System.out.println("An error occured: " + e);
throw e;
}
return true;
}

Java: Write HashMap into File

I'm working on a program that saves two words into a HashMap. I need to be able to take the HashMap key and value and write it into a file as "key:value" format. When my save() method is called, the HashMap contents are supposed to be written into the file whose name was given as parameter to the constructor. The method returns false if the file can't be saved; otherwise it returns true. However, its not working if the File does not exist. It's also not saving changes made to an existing file. I'm not understanding how to read/write files too well... Thank you.
package dictionary;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.util.HashMap;
import java.util.Scanner;
public class MindfulDictionary {
private HashMap<String, String> words;
private File file;
public MindfulDictionary() {
this.words = new HashMap<String, String>();
}
public MindfulDictionary(String file) {
this.file = new File(file);
this.words = new HashMap<String, String>();
}
public boolean load() {
try {
Scanner fileReader = new Scanner(this.file);
while (fileReader.hasNextLine()) {
String line = fileReader.nextLine();
String[] parts = line.split(":"); // the line is split at :
String word = parts[0];
String trans = parts[1];
this.add(word, trans);
}
} catch (Exception e) {
System.out.println("nope");
}
return true;
}
public boolean save() {
boolean saved = true;
BufferedWriter writer = null;
try {
writer = new BufferedWriter(new FileWriter(this.file.getName(), true));
for (String key : this.words.keySet()) {
writer.write(key + ":" + this.words.get(key) + "\n");
writer.newLine();
writer.flush();
writer.close();
}
} catch (Exception e) {
}
return saved;
}
public void add(String word, String translation) {
if ((!this.words.containsKey(word))) {
this.words.put(word, translation);
}
}
public String translate(String word) {
if (this.words.containsKey(word)) {
return this.words.get(word);
} else if (this.words.containsValue(word)) {
for (String key : this.words.keySet()) {
if (this.words.get(key).equals(word)) {
return key;
}
}
}
return null;
}
public void remove(String word) {
if (this.words.containsKey(word)) {
this.words.remove(word);
} else if (this.words.containsValue(word)) {
String remove = "";
for (String key : this.words.keySet()) {
if (this.words.get(key).equals(word)) {
remove += key;
}
}
this.words.remove(remove);
}
}
}

Notice this part of your code,
try {
writer = new BufferedWriter(new FileWriter(this.file.getName(), true));
for (String key : this.words.keySet()) {
writer.write(key + ":" + this.words.get(key) + "\n");
writer.newLine();
writer.flush();
writer.close(); // !!
}
} catch (Exception e) {
}
Here, you are calling close() on the BufferedWriter object. You can not use the object after you have called close() on it.
Once the stream has been closed, further write() or flush() invocations will cause an IOException to be thrown.
Read more about close() here.
Also, since you are catching all the exceptions and not doing anything with them, you did not notice the IOException . In future NEVER do this. At the least log any exception that occurs. This will help you with your debugging.

Access file using Java in Windows with illegal Character in path

I am using a Windows machine and Java. I'm just trying to backup a file, but I ran into an issue with an illegal character in the path ("#"). I really tried and I'm stuck. I rewrote it trying all the variations I could find or think of. Any help would be greatly appreciated.
public class SyncActionMachine {
/**
* #param args the command line arguments
*/
public static void main(String[] args) throws IOException, URISyntaxException {
String MSI_one, MSI_two, dropBox;
GetDate getDate = new GetDate();
MSI_one = "C:\\Users\\Brian\\AppData\\Roaming\\Macromedia\\Flash Player\\#SharedObjects\\Q2965ZS7\\localhost\\ActionMachine.sol";
MSI_two = "C:\\Users\\Brian\\Desktop\\test.txt";
dropBox = "C:\\Users\\Brian\\Dropbox\\Action Machine History\\ActionMachine.sol";
File source = new File(MSI_one);
File destination = new File(dropBox);
// Attempt #1 using string with special characters
try {
Files.copy(source.toPath(), destination.toPath());
} catch (IOException iOException) {
System.out.println("Didn't work: " + iOException);
}
// Attempt #2 using URI - not really sure how to use it.
URI uri;
uri = new URI("file:///C:/Users/Brian/AppDate/Roaming/Macromedia/Flash%20Player/%23SharedObjects/Q2965ZS7/localhost/ActionMachine.sol");
Path uriSelfMadePath = Paths.get(uri);
try {
Files.copy(uriSelfMadePath, destination.toPath());
} catch (IOException iOException) {
System.out.println("Didn't work: " + iOException);
}
// Attempt #3 Suggestion from Aurasphere. Thanks again for quick response.
// Not sure what I'm suppose to do with the URL
String thePath = MSI_one;
thePath = URLEncoder.encode(thePath, "UTF-8");
Path aurasphereThePath = Paths.get(thePath);
try {
Files.copy(aurasphereThePath, destination.toPath());
} catch (IOException iOException) {
System.out.println("Didn't work: " + iOException);
}
// Attempt #4 build path using Patha and passing in augruments separately
Path pathOneByOne = Paths.get("C:", "Users", "Brian", "AppDate", "Roaming", "Macromedia", "Flash Player",
"#SharedObjects", "Q2965ZS7", "localhost", "ActionMachine.sol");
try {
Files.copy(pathOneByOne, destination.toPath());
} catch (IOException iOException) {
System.out.println("Didn't work: " + iOException);
}
// Seeing what all these path's look like
URL fileUrl = source.toURI().toURL();
URI fileUri = source.toURI();
System.out.println("------------Path Print out------------------");
System.out.println("URLEncoder : " + thePath);
Path from = Paths.get(fileUri);
System.out.println("URL : " + fileUrl);
System.out.println("URI : " + fileUri);
System.out.println("source: " + source);
}
}
Thanks for any advice.

Just use URLEncode:
String thePath = "your_path";
thePath = URLEncoder.encode(thePath, "UTF-8");

Thank you everyone that looked and commented. Must have been some sleep derived moment. Anyway here is the source, it worked fine. Turned out # was a big deal, I'm not even sure what my hang up was.
public static void main(String[] args) throws IOException, URISyntaxException {
String MSI_one, MSI_two, dropBox;
GetDate getDate = new GetDate();
MSI_one = "C:\\Users\\Brian\\AppData\\Roaming\\Macromedia\\Flash Player\\#SharedObjects\\Q2965ZS7\\localhost\\ActionMachine.sol";
MSI_two = "C:\\Users\\brian\\AppData\\Roaming\\Macromedia\\Flash Player\\#SharedObjects\\HSTARDTM\\localhost\\ActionMachine.sol";
dropBox = "C:\\Users\\brian\\Dropbox\\Action Machine History\\";
// Create new file name for backup file
dropBox = dropBox + "ActionMachine-" + getDate.today() + ".sol";
File source = new File(MSI_two);
File destination = new File(dropBox);
copyNewFile cf = new copyNewFile(source, destination);
}
public class copyNewFile {
public copyNewFile(File source, File dest) throws IOException {
CopyOption[] options = new CopyOption[]{
StandardCopyOption.REPLACE_EXISTING,
StandardCopyOption.COPY_ATTRIBUTES
};
Files.copy(source.toPath(), dest.toPath(), options);
System.out.println("File sucessfully copied.");
}
}

Using JSoup to save the contents of this url: http://www.aw20.co.uk/images/logo.png to a file

I am try to use JSoup to get the contents of this url http://www.aw20.co.uk/images/logo.png, which is the image logo.png, and save it to a file. So far I have used JSoup to connect to http://www.aw20.co.uk and get a Document. I then went and found the absolute url for the image I am looking for, but now am not sure how to this to get the actual image. So I was hoping someone could point me in the right direction to do so? Also is there anyway I could use Jsoup.connect("http://www.aw20.co.uk/images/logo.png").get(); to get the image?
import java.io.IOException;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
public class JGet2 {
public static void main(String[] args) {
try {
Document doc = Jsoup.connect("http://www.aw20.co.uk").get();
Elements img = doc.getElementsByTag("img");
for (Element element : img) {
String src = element.absUrl("src");
System.out.println("Image Found!");
System.out.println("src attribute is: " + src);
if (src.contains("logo.png") == true) {
System.out.println("Success");
}
getImages(src);
}
}
catch (IOException e) {
e.printStackTrace();
}
}
private static void getImages(String src) throws IOException {
int indexName = src.lastIndexOf("/");
if (indexName == src.length()) {
src = src.substring(1, indexName);
}
indexName = src.lastIndexOf("/");
String name = src.substring(indexName, src.length());
System.out.println(name);
}
}

You can use Jsoup to fetch any URL and get the data as bytes, if you don't want to parse it as HTML. E.g.:
byte[] bytes = Jsoup.connect(imgUrl).ignoreContentType(true).execute().bodyAsBytes();
ignoreContentType(true) is set because otherwise Jsoup will throw an exception that the content is not HTML parseable -- that's OK in this case because we're using bodyAsBytes() to get the response body, rather than parsing.
Check the Jsoup Connection API for more details.

Jsoup isn't designed for downloading the content of the url.
Since you are able to use a third party library, you can try apache common IO for downloading the content of a given URL to file using:
FileUtils.copyURLToFile(URL source, File destination);
It is only one line.

This method does not work well. Please careful when using it.
byte[] bytes = Jsoup.connect(imgUrl).ignoreContentType(true).execute().bodyAsBytes();

You can use these methods or part of these methods to solve your problem.
NOTE: IMAGE_HOME is the absolute path. e.g. /home/yourname/foldername
public static String storeImageIntoFS(String imageUrl, String fileName, String relativePath) {
String imagePath = null;
try {
byte[] bytes = Jsoup.connect(imageUrl).ignoreContentType(true).execute().bodyAsBytes();
ByteBuffer buffer = ByteBuffer.wrap(bytes);
String rootTargetDirectory = IMAGE_HOME + "/"+relativePath;
imagePath = rootTargetDirectory + "/"+fileName;
saveByteBufferImage(buffer, rootTargetDirectory, fileName);
} catch (IOException e) {
e.printStackTrace();
}
return imagePath;
}
public static void saveByteBufferImage(ByteBuffer imageDataBytes, String rootTargetDirectory, String savedFileName) {
String uploadInputFile = rootTargetDirectory + "/"+savedFileName;
File rootTargetDir = new File(rootTargetDirectory);
if (!rootTargetDir.exists()) {
boolean created = rootTargetDir.mkdirs();
if (!created) {
System.out.println("Error while creating directory for location- "+rootTargetDirectory);
}
}
String[] fileNameParts = savedFileName.split("\\.");
String format = fileNameParts[fileNameParts.length-1];
File file = new File(uploadInputFile);
BufferedImage bufferedImage;
InputStream in = new ByteArrayInputStream(imageDataBytes.array());
try {
bufferedImage = ImageIO.read(in);
ImageIO.write(bufferedImage, format, file);
} catch (IOException e) {
e.printStackTrace();
}
}

Also is there anyway I could use Jsoup.connect("http://www.aw20.co.uk/images/logo.png").get(); to get the image?
No, JSoup will only get text and such but cannot be used to download files or binary data. That being said, just use the file name and path that you've gotten through JSoup and then use standard Java I/O to download the file.
I've used NIO to do the downloading. i.e.,
String imgPath = // ... url path to image
String imgFilePath = // ... file path String
URL imgUrl;
ReadableByteChannel rbc = null;
FileOutputStream fos = null;
try {
imgUrl = new URL(imgPath);
rbc = Channels.newChannel(imgUrl.openStream());
fos = new FileOutputStream(imgFilePath);
// setState(EXTRACTING + imgFilePath);
fos.getChannel().transferFrom(rbc, 0, 1 << 24);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (rbc != null) {
try {
rbc.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

Trouble having java and javascript interact [duplicate]

I've seen this question has been asked a lot of times, but still can't manage to get my code working.
I want my webview to load some URL (say www.google.com) and then apply some javascript stored in assets/jstest.js, which contains the following:
function test(){
document.bgColor="#00FF00"; //turns to green the background color
}
And here's where I try to load the JS:
#Override
public void onPageFinished(WebView view, String url){
view.loadUrl("javascript:(function() { "
+ " document.bgColor='#FF0000';" //turns to red the background color
+ " var script=document.createElement('script'); "
+ " script.setAttribute('type','text/javascript'); "
+ " script.setAttribute('src', 'file:///android_asset/jstest.js'); "
+ " script.onload = function(){ "
+ " test(); "
+ " }; "
+ " document.getElementsByTagName('head')[0].appendChild(script); "
+ "})()");
}
I know the javascript here works because the background color actually turns to red, but for some reason it won't load jstest.js. I think the problem might be in file path (I'm certain every other line of the javascript code is correct), but it looks correct to me. And the file is in the right folder.
What am I missing?
EDIT:
Since WebResourceResponse class is available only with API Level 11, here's what I've figured out in the end.
public void onPageFinished(WebView view, String url){
String jscontent = "";
try{
InputStream is = am.open("jstest.js"); //am = Activity.getAssets()
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line;
while (( line = br.readLine()) != null) {
jscontent += line;
}
is.close();
}
catch(Exception e){}
view.loadUrl("javascript:(" + jscontent + ")()");
}
with the jstest.js simply containing:
function() {
document.bgColor="#00FF00";
}

I tried the same thing, loading a bookmarklet (the javascript code in your loadUrl() call) into a third-party page. My bookmarklet also depends on other assets (javascript and css files) which would not load with a file:///android_asset URL.
That's because the security context of the page is still that of, e.g., http://www.google.com, and that's not allowed access to file: URLs. You should be able to see the errors if you supply/override a WebChromeClient.onConsoleMessage().
I ended up with a kludge where I changed the bookmarklet's asset references to a bogus URL scheme, like:
asset:foo/bar/baz.js
and added a WebViewClient.shouldInterceptRequest() override which looks for those and loads them from assets using AssetManager.open().
One thing I don't like about this kludge is that the asset: scheme is open to any third-party HTML/Javascript on any page my view loads, giving them access to my app's assets.
One alternative, which I didn't try, would be to embed the sub-assets in the bookmarklet using data: URLs, but that can get unwieldy.
I'd much prefer it if there was a way to manipulate the security context of just the JS bookmarklet I'm loading in loadUrl(), but I can't find anything like that.
Here's a snippet:
import android.webkit.WebResourceResponse;
...
private final class FooViewClient extends WebViewClient
{
private final String bookmarklet;
private final String scheme;
private FooViewClient(String bookmarklet, String scheme)
{
this.bookmarklet = bookmarklet;
this.scheme = scheme;
}
#Override
public void onPageFinished(WebView view, String url)
{
view.loadUrl(bookmarklet);
}
#Override
public WebResourceResponse shouldInterceptRequest(WebView view, String url)
{
if (url.startsWith(scheme))
try
{
return new WebResourceResponse(url.endsWith("js") ? "text/javascript" : "text/css", "utf-8",
Foo.this.getAssets().open(url.substring(scheme.length())));
}
catch (IOException e)
{
Log.e(getClass().getSimpleName(), e.getMessage(), e);
}
return null;
}
}

I think the iceam cream webview client of cordova does the very thing you want to do.
It would be nice if this was documented somewhere but, as far as I can see, it is not.
Take a look at cordova's android github:
https://github.com/apache/incubator-cordova-android/blob/master/framework/src/org/apache/cordova/IceCreamCordovaWebViewClient.java

Here is how i ended up doing it. I used the Content:// protocol and set up a contentprovider to handle returning a file descriptor to the system
Here is my fileContentProvider:
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.io.IOUtils;
import android.content.ContentProvider;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.ParcelFileDescriptor;
import android.util.Log;
public class FileContentProvider extends ContentProvider {
#Override
public ParcelFileDescriptor openFile(Uri uri, String mode) {
Log.d("FileContentProvider","fetching: " + uri);
ParcelFileDescriptor parcel = null;
String fileNameRequested = uri.getLastPathSegment();
String[] name=fileNameRequested.split("\\.");
String prefix=name[0];
String suffix=name[1];
// String path = getContext().getFilesDir().getAbsolutePath() + "/" + uri.getPath();
//String path=file:///android_asset/"+Consts.FILE_JAVASCRIPT+"
/*check if this is a javascript file*/
if(suffix.equalsIgnoreCase("js")){
InputStream is = null;
try {
is = getContext().getAssets().open("www/"+Consts.FILE_JAVASCRIPT);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
File file = stream2file(is,prefix,suffix);
try {
parcel = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
} catch (FileNotFoundException e) {
Log.e("FileContentProvider", "uri " + uri.toString(), e);
}
}
return parcel;
}
/*converts an inputstream to a temp file*/
public File stream2file (InputStream in,String prefix,String suffix) {
File tempFile = null;
try {
tempFile = File.createTempFile(prefix, suffix);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
tempFile.deleteOnExit();
FileOutputStream out = null;
try {
out = new FileOutputStream(tempFile);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
IOUtils.copy(in, out);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return tempFile;
}
#Override
public boolean onCreate() {
return true;
}
#Override
public int delete(Uri uri, String s, String[] as) {
throw new UnsupportedOperationException("Not supported by this provider");
}
#Override
public String getType(Uri uri) {
throw new UnsupportedOperationException("Not supported by this provider");
}
#Override
public Uri insert(Uri uri, ContentValues contentvalues) {
throw new UnsupportedOperationException("Not supported by this provider");
}
#Override
public Cursor query(Uri uri, String[] as, String s, String[] as1, String s1) {
throw new UnsupportedOperationException("Not supported by this provider");
}
#Override
public int update(Uri uri, ContentValues contentvalues, String s, String[] as) {
throw new UnsupportedOperationException("Not supported by this provider");
}
}
in the manifest i defined the provider:
<provider android:name="com.example.mypackage.FileContentProvider"
android:authorities="com.example.fileprovider"
/>
Here is the javascript o inject into the webview:
webView.loadUrl("javascript:(function() { "
+ "var script=document.createElement('script'); "
+ " script.setAttribute('type','text/javascript'); "
+ " script.setAttribute('src', 'content://com.example.fileprovider/myjavascriptfile.js'); "
/* + " script.onload = function(){ "
+ " test(); "
+ " }; "
*/ + "document.body.appendChild(script); "
+ "})();");
and here is the myjavascriptfile.js (as an example):
function changeBackground(color) {
document.body.style.backgroundColor = color;
}

Maybe you could have assets as 'html/javascript templates'. You could combine different of these text sources and string logic to compose your desired html to be loaded into the WebViewer. Then, you use .loadData instead of .loadUrl
I'm using it on my own and it seems to work pretty well.
Hope it helps!

With the following two conditions given:
minSdkVersion 21
targetSdkVersion 28
I am able to successfully load any local asset (js, png, css) via the following Java code
#Override
public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
Uri uri = request.getUrl();
if (uri.getHost().equals("assets")) {
try {
return new WebResourceResponse(
URLConnection.guessContentTypeFromName(uri.getPath()),
"utf-8",
MainActivity.this.getAssets().open(uri.toString().substring(15)));
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
And in the HTML code I can use
<link rel="stylesheet" href="https://assets/material.min.css">
<script src="https://assets/material.min.js"></script>
<script src="https://assets/moment-with-locales.min.js"></script>
<img src="https://assets/stackoverflow.png">
In Java the following then also works (you'd also need to add a favicon.ico to the assets)
webView.loadUrl("https://assets/example.html");
Using https:// as the scheme allows me to load local assets from a page served via HTTPS without security issues due to mixed-content.
None of these require to be set:
webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
webSettings.setDomStorageEnabled(true);
webSettings.setAllowContentAccess(true);
webSettings.setAllowFileAccess(true);
webSettings.setAllowFileAccessFromFileURLs(true);
webSettings.setAllowUniversalAccessFromFileURLs(true);