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[CB-2632] Implement FileReader.readAsBinaryString

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This commit is contained in:
Andrew Grieve 2013-03-15 16:47:33 -04:00
parent 7755a902dd
commit 66b827e502
1 changed files with 43 additions and 124 deletions
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165
framework/src/org/apache/cordova/FileUtils.java
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@ -22,6 +22,7 @@ import android.database.Cursor;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import org.apache.commons.codec.binary.Base64;
import org.apache.cordova.api.CallbackContext;
@ -49,9 +50,6 @@ import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLDecoder;
import java.nio.channels.FileChannel;
//import android.content.Context;
//import android.app.Activity;
/**
* This class provides SD card file and directory services to JavaScript.
@ -113,40 +111,29 @@ public class FileUtils extends CordovaPlugin {
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK, b));
}
else if (action.equals("readAsText")) {
int start = 0;
int end = Integer.MAX_VALUE;
if (args.length() >= 3) {
start = args.getInt(2);
}
if (args.length() >= 4) {
end = args.getInt(3);
}
String encoding = args.getString(1);
int start = args.getInt(2);
int end = args.getInt(3);
this.readAsText(args.getString(0), args.getString(1), start, end, callbackContext);
this.readFileAs(args.getString(0), start, end, callbackContext, encoding, PluginResult.MESSAGE_TYPE_STRING);
}
else if (action.equals("readAsDataURL")) {
int start = 0;
int end = Integer.MAX_VALUE;
if (args.length() >= 2) {
start = args.getInt(1);
}
if (args.length() >= 3) {
end = args.getInt(2);
}
int start = args.getInt(1);
int end = args.getInt(2);
this.readAsDataURL(args.getString(0), start, end, callbackContext);
this.readFileAs(args.getString(0), start, end, callbackContext, null, -1);
}
else if (action.equals("readAsArrayBuffer")) {
int start = 0;
int end = Integer.MAX_VALUE;
if (args.length() >= 2) {
start = args.getInt(1);
}
if (args.length() >= 3) {
end = args.getInt(2);
}
int start = args.getInt(1);
int end = args.getInt(2);
this.readAsBinary(args.getString(0), start, end, callbackContext);
this.readFileAs(args.getString(0), start, end, callbackContext, null, PluginResult.MESSAGE_TYPE_ARRAYBUFFER);
}
else if (action.equals("readAsBinaryString")) {
int start = args.getInt(1);
int end = args.getInt(2);
this.readFileAs(args.getString(0), start, end, callbackContext, null, PluginResult.MESSAGE_TYPE_BINARYSTRING);
}
else if (action.equals("write")) {
long fileSize = this.write(args.getString(0), args.getString(1), args.getInt(2));
@ -929,27 +916,6 @@ public class FileUtils extends CordovaPlugin {
return getEntry(new File(path));
}
/**
* Identifies if action to be executed returns a value and should be run synchronously.
*
* @param action The action to execute
* @return T=returns value
*/
public boolean isSynch(String action) {
if (action.equals("testSaveLocationExists")) {
return true;
}
else if (action.equals("getFreeDiskSpace")) {
return true;
}
else if (action.equals("testFileExists")) {
return true;
}
else if (action.equals("testDirectoryExists")) {
return true;
}
return false;
}
//--------------------------------------------------------------------------
// LOCAL METHODS
@ -965,59 +931,39 @@ public class FileUtils extends CordovaPlugin {
* @param end End position to stop at (exclusive).
* @return Contents of file.
*/
public void readAsText(final String filename, final String encoding, final int start, final int end, final CallbackContext callbackContext) {
Runnable readAsTextRunnable = new Runnable() {
public void readFileAs(final String filename, final int start, final int end, final CallbackContext callbackContext, final String encoding, final int resultType) {
this.cordova.getThreadPool().execute(new Runnable() {
public void run() {
try {
int diff = end - start;
byte[] bytes = new byte[1000];
BufferedInputStream bis = new BufferedInputStream(FileHelper.getInputStreamFromUriString(filename, cordova), 1024);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
int numRead = 0;
byte[] bytes = readAsBinaryHelper(filename, start, end);
if (start > 0) {
bis.skip(start);
PluginResult result;
switch (resultType) {
case PluginResult.MESSAGE_TYPE_STRING:
result = new PluginResult(PluginResult.Status.OK, new String(bytes, encoding));
break;
case PluginResult.MESSAGE_TYPE_ARRAYBUFFER:
result = new PluginResult(PluginResult.Status.OK, bytes);
break;
case PluginResult.MESSAGE_TYPE_BINARYSTRING:
result = new PluginResult(PluginResult.Status.OK, bytes, true);
break;
default: // Base64.
String contentType = FileHelper.getMimeType(filename, cordova);
byte[] base64 = Base64.encodeBase64(bytes);
String s = "data:" + contentType + ";base64," + new String(base64, "US-ASCII");
result = new PluginResult(PluginResult.Status.OK, s);
}
while ( diff > 0 && (numRead = bis.read(bytes, 0, Math.min(1000, diff))) >= 0) {
diff -= numRead;
bos.write(bytes, 0, numRead);
}
String result = new String(bos.toByteArray(), encoding);
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK, result));
callbackContext.sendPluginResult(result);
} catch (FileNotFoundException e) {
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.IO_EXCEPTION, NOT_FOUND_ERR));
} catch (IOException e) {
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.IO_EXCEPTION, e.getLocalizedMessage()));
Log.d(LOG_TAG, e.getLocalizedMessage());
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.IO_EXCEPTION, NOT_READABLE_ERR));
}
}
};
this.cordova.getThreadPool().execute(readAsTextRunnable);
}
/**
* Read the contents of a file as binary.
* This is done in a background thread; the result is sent to the callback.
*
* @param filename The name of the file.
* @param encoding The encoding to return contents as. Typical value is UTF-8. (see http://www.iana.org/assignments/character-sets)
* @param start Start position in the file.
* @param end End position to stop at (exclusive).
* @return Contents of file.
*/
public void readAsBinary(final String filename, final int start, final int end, final CallbackContext callbackContext) {
Runnable readAsBinaryRunnable = new Runnable() {
public void run() {
try {
byte[] result = readAsBinaryHelper(filename, start, end);
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK, result));
} catch (IOException e) {
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.IO_EXCEPTION, e.getLocalizedMessage()));
}
}
};
this.cordova.getThreadPool().execute(readAsBinaryRunnable);
});
}
/**
@ -1049,33 +995,6 @@ public class FileUtils extends CordovaPlugin {
return bos.toByteArray();
}
/**
* Read the contents of a file as a base64 encoded data URL.
*
* @param filename The name of the file.
* @param start Start position in the file.
* @param end End position to stop at (exclusive).
* @return Contents of file = data:<media type>;base64,<data>
*/
public void readAsDataURL(final String filename, final int start, final int end, final CallbackContext callbackContext) {
Runnable readAsDataUrlRunnable = new Runnable() {
public void run() {
try {
// Determine content type from file name
String contentType = FileHelper.getMimeType(filename, cordova);
byte[] base64 = Base64.encodeBase64(readAsBinaryHelper(filename, start, end));
String result = "data:" + contentType + ";base64," + new String(base64);
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK, result));
} catch (IOException e) {
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.IO_EXCEPTION, e.getLocalizedMessage()));
}
}
};
this.cordova.getThreadPool().execute(readAsDataUrlRunnable);
}
/**
* Write contents of file.
*