Develop Reference

can not load javascript drow2d canvas with manuall extends cods

I have added some functionality to my objects in draw2d canvas. such as :
var MyConnection= draw2d.Connection.extend({
init:function(attr){
this._super(attr);
this.setRouter(new draw2d.layout.connection.VertexRouter());
this.setOutlineStroke(1);
this.setOutlineColor("#000000");
this.setStroke(3);
this.setColor('#ffffff');
this.setRadius(150);
this.conectionResult={"src":{"nms":true,"trg":true},"trg":{"nms":true,"src":"true"}};
},
onContextMenu:function(x,y){
$.contextMenu({
selector: 'body',
events:{
hide:function(){ $.contextMenu( 'destroy' ); }
},
callback: $.proxy(function(key, options){
switch(key){
case "check":
result = this.checkConection();
this.conectionResult=result;
console.log(result);
if(result.src.trg && result.trg.src){
this.setColor("#FFFFFF");
}else{
this.setColor("#FF4422");
}
break;
case "report":
message=[];
result=this.conectionResult;
if(result.src.trg && result.trg.src){
alert("OK");
}else{
src=this.getSource();
trg=this.getTarget();
if(result.src.nms){
message.push("NMS Can See "+src.userData.dev_name);
if(result.src.trg){
message.push(src.userData.dev_name +" Can See "+trg.userData.dev_name);
}else{
message.push(src.userData.dev_name +" CAN NOT See "+trg.userData.dev_name);
}
}else{
message.push("NMS CAN NOT See "+trg.userData.dev_name);
if(result.src.trg){
message.push(src.userData.dev_name +"Can See "+trg.userData.dev_name);
}else{
message.push(src.userData.dev_name +"CAN NOT See "+trg.userData.dev_name+" Or NMS Can not confirm it");
}
}
if(result.trg.nms){
message.push("NMS Can See "+trg.userData.dev_name);
if(result.trg.src){
message.push(trg.userData.dev_name +" Can See "+src.usedData.dev_name);
}else{
message.push(trg.userData.dev_name +" CAN NOT See "+src.userData.dev_name);
}
}else{
message.push("NMS CAN NOT See "+trg.dev_name);
if(result.src.trg){
message.push(src.userData.dev_name +" Can See "+trg.userData.dev_name);
}else{
message.push(src.userData.dev_name +" CAN NOT See "+trg.userData.dev_name+" Or NMS Can not confirm it.");
}
}
alert(message.join("\n"));
}
break;
case "delete":
var cmd = new draw2d.command.CommandDelete(this);
this.getCanvas().getCommandStack().execute(cmd);
default:
break;
}
},this),
x:x,
y:y,
items:
{
"check":{name:"Check", icon:"edit"},
"report":{name:"Report",icon:"edit"},
"sep1": "---------"
,"delete": {name: "Delete", icon: "delete"}
}
});
},
checkConection:function(){
src=this.getSource();
trg=this.getTarget();
console.log("Source IP:"+src.userData.ip+", Target Ip:"+trg.userData.ip);
results={"src":{"nms":false,"trg":false},"trg":{"nms":false,"src":false}};
$.ajax({
url:"***/index.php?r=/******/check-conection&src="+src.userData.ip+"&trg="+trg.userData.ip,
async:false,
success: function(result){
results=result;
}
});
console.log(results);
this.conectionResult=results;
this.setConectionColor();
return results;
},
setConectionColor:function(){
result=this.conectionResult;
console.log(result);
if(result.src.trg && result.trg.src){
this.setColor("#FFFFFF");
}else{
this.setColor("#FF4422");
}
}
});
~
i used below method to save them via AJAX request in server.
function saveTopology(){
var writer = new draw2d.io.json.Writer();
writer.marshal(canvas, function(json){
var jsonTxt = JSON.stringify(json,null,2); .
$("pre").text(jsonTxt);
});
alert($("pre").text());
draw2d=JSON.stringify(JSON.parse($("pre").html()));
var data={
id :1,
draw2d : draw2d,
map_id : 1
};
var url = "topology/save";
result = AjaxResponce(url,data,"POST");
$("pre").html(result);
displayJSON(canvas);
}
and used below to reload it for next times.
function setTopology(){
write2status("Requesting Topology of map_id 1 ...");
draw2d.Configuration.factory.createConnection = function (sourcePort, targetPort) {
var conn = new MyConnection({});
return conn;
};
var topology = AjaxResponce("topology/get-topology",{tplg_id:tplg_id});
console.log(topology);
data = topology;
var bg_map = "url('"+data.bg_map+"')";
var width = data.width;
var height = data.height;
var background_size = height+"px "+width+"px ";
if(typeof(data.draw2d)==="Array"){
$.each(data.draw2d,function(index,item){
if(typeof(item.userData) != "undefined" &&Object.keys(item.userData).length >0){
if(typeof(item.userData.dev_id) !== "undefined")
usedDevices.push(item.userData.dev_id);
}
});
}
topology=JSON.stringify(data.draw2d);
$(".ui-droppable").css({"background-image":bg_map});
$(".ui-droppable").css({"height":parseInt(height)*1.1});
$(".ui-droppable").css({"width":parseInt(width)*1.1});
write2status("Adding map to page...");
$("pre#json").html(topology);
write2status("Map added...");
}
I set
draw2d.Configuration.factory.createConnection = function (sourcePort, targetPort) {
var conn = new MyConnection({});
return conn;
};`
The functionalities works when i open a new form but nor added functionalities loads after reloading the page while they are asigned to any new objects that add to page after reload.
Can any one help me to solve this problem?

I've solve the problem but not sure is a correct way.
I just changed
var MyConnection= draw2d.Connection.extend({
in first code to
draw2d.Connection = draw2d.Connection.extend({
then removed related codes of 3th file. in this case Draw2d loads My connection instead of default function.

Chrome: Unable to use FileSystem API due to the error "Uncaught ReferenceError: FileError is not defined"

I am working on a Chrome Extension which will read file from the drive. For testing purpose I am using the code given online to test FileSystem APIs. Upon running I get error
Uncaught ReferenceError: FileError is not defined
I am on OSX. I even added the flag by doing like below but no difference:
open /Applications/Google\ Chrome.app --args --allow-file-access-from-files
What is wrong being done by me? The code given below:
<!DOCTYPE html>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<meta charset=utf-8 />
<title>Chrome File API tester</title>
<script>
window.requestFileSystem = window.requestFileSystem || window.webkitRequestFileSystem;
// Handle errors
function errorHandler(e) {
var msg = '';
switch (e.code) {
case FileError.QUOTA_EXCEEDED_ERR:
msg = 'QUOTA_EXCEEDED_ERR';
break;
case FileError.NOT_FOUND_ERR:
msg = 'NOT_FOUND_ERR';
break;
case FileError.SECURITY_ERR:
msg = 'SECURITY_ERR';
break;
case FileError.INVALID_MODIFICATION_ERR:
msg = 'INVALID_MODIFICATION_ERR';
break;
case FileError.INVALID_STATE_ERR:
msg = 'INVALID_STATE_ERR';
break;
default:
msg = 'Unknown Error';
break;
};
console.log('Error: ' + msg);
}
// Init and write some data to a file
function onInitFs(fs) {
fs.root.getFile('log-f-api.txt', {create: true}, function(fileEntry) {
fileEntry.isFile === true;
fileEntry.name == 'log-f-api.txt';
fileEntry.fullPath == '/log-f-api.txt';
// Create a FileWriter object for our FileEntry (log.txt).
fileEntry.createWriter(function(fileWriter) {
fileWriter.onwriteend = function(e) {
console.log('Write completed.');
};
fileWriter.onerror = function(e) {
console.log('Write failed: ' + e);
};
// Create a new Blob and write it to log.txt.
if (!window.BlobBuilder && window.WebKitBlobBuilder)
window.BlobBuilder = window.WebKitBlobBuilder; // in Chrome 12.
var bb = new BlobBuilder();
bb.append("some stuff");
console.log("bb size:"+bb.size);
bb.append('put some nice text in our file....');
var ourData = bb.getBlob('text/plain');
fileWriter.write(ourData);
}, errorHandler);
}, errorHandler);
}
// start the party
$(function() {
document.getElementById('hello').innerHTML = 'start the tests';
window.requestFileSystem(window.PERSISTENT, 5*1024*1024, onInitFs,errorHandler);
});
</script>
</head>
<body>
<p id="hello">Tester FIle API</p>
<h4>Other links</h4>
<ul>
<li>http://code.google.com/chrome/extensions/trunk/fileBrowserHandler.html#event-onExecute</li>
<li>http://html5rocks.com</li>
</ul>
</body>
</html>

As #wOxxOm points out, FileError is obsolete and should be avoided.
DOMError interface is also deprecated.
Just update errorHandler function with the error codes from here:
https://developer.mozilla.org/en-US/docs/Web/API/FileError#Error_codes

FileError objects are passed to error callbacks.
https://developer.mozilla.org/en-US/docs/Web/API/FileError
There is no errorHandler in your code.
window.requestFileSystem = window.requestFileSystem || window.webkitRequestFileSystem;
window.requestFileSystem(window.TEMPORARY, 5*1024*1024, initFS, errorHandler); // This is missing
Source - https://code.tutsplus.com/tutorials/toying-with-the-html5-file-system-api--net-24719.

Using File System as source of videos for playing offline

I am trying to add offline functionality to my HTML5 video player. I am attempting to write the files into the chrome file system as a blob and then read them from there. I believe that I am running into an issue where the files are not actually being written, just the file name. As my below code is currently constituted, it works, though still only if it is permanently connected to the internet. My goal is to have the files download to a persistent directory in the filesystem and then continue to play if the internet is disconnected.
$(document).ready(function() {
var dir = "http://www.kevmoe.com/networks/gsplayer/";
var fileextension = ".mp4";
var srcfiles = $.ajax({
//This will retrieve the contents of the folder if the folder is configured as 'browsable'
url: dir,
success: function(data) {
//List all .mp4 file names in the page
$(data).find("a:contains(" + fileextension + ")").each(function() {
var filename = $(this).attr("href").replace(window.location.host, "").replace("http://", "");
$("#container").append("<div id='div1' class='video'><video id='video1' class='vidarray' preload='none' poster='bkg.png'><source src='" + filename + "' type='video/mp4'></video></div>");
async: false;
window.requestFileSystem = window.requestFileSystem || window.webkitRequestFileSystem;
window.requestFileSystem(window.PERSISTANT, 200000 * 1024 * 1024, initFS, errorHandler);
function initFS(fs) {
console.log('filesystem engaged'); // Just to check if everything is OK :)
// place the functions you will learn bellow here
function errorHandler(err) {
var msg = 'An error occured: ';
};
function createDir(rootDir, folders) {
rootDir.getDirectory(folders[0], {
create: true
}, function(dirEntry) {
if (folders.length) {
createDir(dirEntry, folders.slice(1));
}
}, errorHandler);
};
createDir(fs.root, 'files/video/'.split('/'));
fs.root.getDirectory('video', {}, function(dirEntry) {
var dirReader = dirEntry.createReader();
dirReader.readEntries(function(entries) {
for (var i = 0; i < entries.length; i++) {
var entry = entries[i];
if (entry.isDirectory) {
console.log('Directory: ' + entry.fullPath);
} else if (entry.isFile) {
console.log('File: ' + entry.fullPath);
}
}
}, errorHandler);
}, errorHandler);
fs.root.getFile(filename, {
create: true,
exclusive: true
}, function(fileEntry) {
fileEntry.createWriter(function(fileWriter) {
var blob = new Blob([data], {
type: 'video/mp4'
});
fileWriter.write(blob);
}, errorHandler);
console.log('file downloaded');
}, errorHandler);
//Try to add an event listener for when all files are finished loading into file system. Then use another function to source the videos locally.
var dirReader = fs.root.createReader();
var entries = [];
// Call the reader.readEntries() until no more results are returned.
dirReader.readEntries(function(results) {
//List all .mp4 file names in the page
$(results).find("a:contains(" + fileextension + ")").each(function() {
var filename = $(this).attr("href").replace(window.location.host, "").replace("http://", "");
$("#container").append("<div id='div1' class='video'><video id='video1' class='vidarray' preload='none' poster='bkg.png'><source src='" + filename + "' type='video/mp4'></video></div>");
async: false;
}, errorHandler);
});
};
function errorHandler() {
console.log('An error occured');
};
});
var videos = $('.video');
//handle ending of video
videos.find('video').on('ended', function() {
playNextVideo(videos);
});
// start with the first one
playNextVideo(videos);
function playNextVideo(videoList) {
var activeVideo = videoList.filter('.active').removeClass('active'), // identify active video and remove active class
activeIndex = videoList.index(activeVideo), // get the active video index in the group
nextVideo = videoList.eq(activeIndex + 1), // get the next video in line
actualVideo;
// if there is no next video start from first
if (nextVideo.length == 0) nextVideo = videoList.first();
// pause all videos
videoList.find('video').each(function() {
this.pause();
})
// get reference to next video element
actualVideo = nextVideo.find('video').get(0);
// add active class to next video
nextVideo.addClass('active');
// load and play
actualVideo.volume = 0.04;
actualVideo.load();
actualVideo.play();
}
}
});
});

filesystem: protocol stores files with reference to same origin as document which requests LocalFileSystem. That is, if JavaScript at Question is created at, for example, http://example.org, the path to LocalFileSystem should be same origin as http://example.org, not file: protocol.
If you are trying to store files or folders for accessing at file: protocol, offline, you can create an .html document to use as a template bookmark.
Visit the local .html file once while online to get files and populate LocalFileSystem. If navigator.onLine is true, navigate to http://example.org, else get and process files and folders stored at LocalFileSystem.
Create a list as JSON or JavaScript Array to store list of files to fetch, instead of parsing an .html document for file locations.
Store local file as a bookmark. Launch Chromium, Chrome with --allow-file-access-from-files flag set to access filesystem: protocol from file: protocol and file: protocol at filesystem: protocol, if not online.
<!DOCTYPE html>
<html>
<head>
<title>LocalFileSystem Offline Videos Bookmark</title>
</head>
<body>
<script>
// location to visit if online
const onLineURL = "https://lorempixel.com/"
+ window.innerWidth
+ "/"
+ window.innerHeight + "/cats";
const props = {
requestedBytes: 1024 * 1024 * 20000,
folder: "videos",
// list of files to fetch for offline viewing
mediaList: [
"http://mirrors.creativecommons.org/movingimages/webm/"
+ "ScienceCommonsJesseDylan_240p.webm"
, "https://nickdesaulniers.github.io/netfix/demo/frag_bunny.mp4"
]
};
let grantedBytes = 0;
function getLocalFileSystem ({requestedBytes = 0, mediaList=[], folder = ""}) {
if (!requestedBytes || !mediaList.length || !folder) {
throw new Error("requestedBytes: Number"
+ " or mediaList: Array"
+ " or folder: String not defined");
};
// do stuff with `filesystem:` URL
function processLocalFilePath(localPath) {
const video = document.createElement("video");
document.body.appendChild(video);
video.controls = true;
video.src = localPath;
}
function errorHandler(err) {
console.log(err);
}
function writeFile(dir, fn, fp, localPath) {
console.log(dir, fn, fp, localPath);
dir.getFile(fn, {}, function(fileEntry) {
fileEntry.createWriter(function(fileWriter) {
fileWriter.onwriteend = function(e) {
// do stuff when file is written
console.log(e.type, localPath + " written");
window.webkitResolveLocalFileSystemURL(localPath
, function(file) {
// file exists in LocalFileSystem
processLocalFilePath(localPath);
}, errorHandler)
};
fileWriter.onerror = errorHandler;
fetch(fp).then(function(response) {
return response.blob()
}).then(function(blob) {
fileWriter.write(blob);
}).catch(errorHandler)
}, errorHandler);
}, errorHandler);
}
if (mediaList && mediaList.length) {
navigator.webkitTemporaryStorage.requestQuota(requestedBytes
, function(grantedBytes_) {
grantedBytes = grantedBytes_;
console.log("Requested bytes:", requestedBytes
, "Granted bytes:", grantedBytes);
window.webkitRequestFileSystem(window.TEMPORARY
, grantedBytes
, function(fs) {
const url = fs.root.toURL();
mediaList.forEach(function(filename) {
const localPath = url + folder + "/"
+ filename.split("/").pop();
window.webkitResolveLocalFileSystemURL(localPath
, function(file) {
// file exists in LocalFileSystem
console.log(localPath + " exists at LocalFileSystem");
processLocalFilePath(localPath)
}, function(err) {
console.log(err, localPath
+ " not found in LocalFileSystem");
// Exception is thrown if file
// or folder path not found
// create `folder` directory, get files
fs.root.getDirectory(folder, {}
, function(dir) {
writeFile(dir
, filename.split("/").pop()
, filename
, localPath);
}),
errorHandler
})
})
})
}, errorHandler)
}
}
if (location.href !== onLineURL && navigator.onLine) {
location.href = onLineURL;
} else {
getLocalFileSystem(props);
}
</script>
</body>
</html>
See also
How to use webkitRequestFileSystem at file: protocol
How to print all the txt files inside a folder using java script
Read local XML with JS
How to Write in file (user directory) using JavaScript?
An alternative approach could be to utilize ServiceWorker
Adding a Service Worker and Offline into your Web App
Service Worker Sample: Custom Offline Page Sample

Your user must grant your app permission to store data locally before your app can use persistent storage.
That's why you have to request quota first. The amount of bytes you ask for is 200000 * 1024 * 1024 bytes.
window.storageInfo.requestQuota(PERSISTENT, 200000 * 1024 * 1024,
function(grantedBytes) {
window.requestFileSystem(window.PERSISTENT, grantedBytes, onInitFs, errorHandler);
},
errorHandler
);
MDN documentation
I noticed you are writing this for Chrome, here's how you manage the quota in Chrome

Cordova - download image from URL to the pictures gallery

I created a simple cordova android app and I am trying to download an image from an URL to the pictures gallery, but I really can't figure out what is going wrong.
I have already searched a lot here in stackoverflow, including the following links:
Phonegap - Save image from url into device photo gallery
How to save an Image object into a file in Android with Phonegap?
I have installed cordova File Transfer plugin and tried to do the example from the official site, but it didn't work too: https://cordova.apache.org/docs/en/latest/reference/cordova-plugin-file-transfer/
I tried 2 different codes, which are:
1) First attempt:
document.getElementById("myBtn").addEventListener("click", function () {
download("http://cordova.apache.org/static/img/cordova_bot.png", "data", "new_file");
});
function download(URL, Folder_Name, File_Name) {
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, fileSystemSuccess, fileSystemFail);
function fileSystemSuccess(fileSystem) {
var download_link = encodeURI(URL);
ext = download_link.substr(download_link.lastIndexOf('.') + 1); //Get extension of URL
var directoryEntry = fileSystem.root; // to get root path of directory
directoryEntry.getDirectory(Folder_Name, {
create: true,
exclusive: false
}, onDirectorySuccess, onDirectoryFail); // creating folder in sdcard
var rootdir = fileSystem.root;
var fp = rootdir.toURL();
fp = fp + "/" + Folder_Name + "/" + File_Name + "." + ext; // fullpath and name of the file which we want to give
filetransfer(download_link, fp);
}
function onDirectorySuccess(parent) {
// Directory created successfuly
}
function onDirectoryFail(error) {
alert("Unable to create new directory: " + error.code);
}
function fileSystemFail(evt) {
//Unable to access file system
alert(evt.target.error.code);
}
}
function filetransfer(download_link, fp) {
var fileTransfer = new FileTransfer();
fileTransfer.download(download_link, fp,
function (entry) {
alert("download complete: " + entry.fullPath);
//cordova.plugins.imagesaver.saveImageToGallery(entry.fullPath, successCallback, errorCallback);
},
function (error) {
alert("download error source " + error.source);
}
);
}
In this attempt, I get the alert message "download complete: /my_folder/new_file.png" but I can't find where the picture is downloaded.
It is definitely not in the pictures gallery or anywhere I can find it.
2) Second attempt:
function download() {
window.requestFileSystem(window.TEMPORARY, 5 * 1024 * 1024, function (fs) {
var url = 'http://cordova.apache.org/static/img/cordova_bot.png';
fs.root.getFile('downloaded-image.png', {
create: true,
exclusive: false
}, function (fileEntry) {
file_transfer(fileEntry, encodeURI(url), true);
}, onErrorCreateFile);
}, onErrorLoadFs);
}
function onErrorLoadFs(msg){
alert(msg);
}
function onErrorCreateFile(msg){
alert(msg);
}
function file_transfer(fileEntry, uri, readBinaryData) {
var fileTransfer = new FileTransfer();
var fileURL = fileEntry.toURL();
fileTransfer.download(
uri,
fileURL,
function (entry) {
alert("download complete: " + entry.toURL());
if (readBinaryData) {
// Read the file...
readBinaryFile(entry);
} else {
// Or just display it.
displayImageByFileURL(entry);
}
},
function (error) {
alert("download error source " + error.source);
alert("download error target " + error.target);
alert("upload error code" + error.code);
},
null, // or, pass false
{
//headers: {
// "Authorization": "Basic dGVzdHVzZXJuYW1lOnRlc3RwYXNzd29yZA=="
//}
}
);
}
In this attempt, I get the alert message "download complete: file:///data/user/0/com.companyname.xxxxxxx/cache/downloaded-image.png", but I also can't find the picture anywhere in the device.
I have already tried the application in two different android devices.

This is how I did it.
you will need the cordova file plugin
it wil take a url(png in my case)
and it will save it in your download folder (which makes it apear in the gallery of your phone)
//download file to device
function DownloadToDevice(fileurl) {
var blob = null;
var xhr = new XMLHttpRequest();
xhr.open("GET", fileurl);
xhr.responseType = "blob";//force the HTTP response, response-type header to be blob
xhr.onload = function()
{
blob = xhr.response;//xhr.response is now a blob object
console.log(blob);
var storageLocation = "";
switch (device.platform) {
case "Android":
storageLocation = 'file:///storage/emulated/0/';
break;
case "iOS":
storageLocation = cordova.file.documentsDirectory;
break;
}
var folderpath = storageLocation + "Download";
var filename = "Myimg.png";
var DataBlob = blob;
window.resolveLocalFileSystemURL(folderpath, function(dir) {
dir.getFile(filename, {create:true}, function(file) {
file.createWriter(function(fileWriter) {
fileWriter.write(DataBlob);
//Download was succesfull
}, function(err){
// failed
console.log(err);
});
});
});
}
xhr.send();
}

You should change the line
window.requestFileSystem(window.TEMPORARY, 5 * 1024 * 1024,
->
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0,
and
if download success, you should re-scan your device storage, because Cordova does not know if the file is downloaded.
so i made a plugin ,
It is a plugin that updates the gallery after downloading.
https://github.com/pouu69/cordova-plugin-gallery-refresh

If you are still looking for solution try this working plugin for android
cordova plugin add cordova-plugin-downloadimage-to-gallery

I use this function with callbacks.
To check the different types of cordovaFileSystem see here or check the ones available to you by typing in the console console.log(cordova.file)
downloadFileToDevice('https://example.com/image.jpg', 'myimg.jpg', cordova.file.cacheDirectory,
(err, filePath) => {
if (err) {
console.log('An error was found: ', err)
} else {
console.log('file downloaded successfully to: ' + filePath)
}
})
Function declaration
function downloadFileToDevice (fileurl, filename, cordovaFileSystem, callback) {
var blob = null
var xhr = new XMLHttpRequest()
xhr.open('GET', fileurl)
xhr.responseType = 'blob' // force the HTTP response, response-type header to be blob
xhr.onload = function () {
blob = xhr.response // xhr.response is now a blob object
var DataBlob = blob
window.resolveLocalFileSystemURL(cordovaFileSystem, function (dir) {
dir.getFile(filename, { create: true }, function (file) {
file.createWriter(function (fileWriter) {
fileWriter.write(DataBlob)
callback(null, cordovaFileSystem + filename)
}, function (err) {
callback(err)
})
})
})
}
xhr.send()
}

What is wrong with fileOpener2?

This question is edit for better undersatnding:
I am trying to use the cordova fileOpener2 plugin to open pdf files in my app's assets.
I obtain the file's uri thanks to lines 14 and onward of code below.
The uri is then stored as a varialbe (nonencodeduri).
However when I try to use the variable in the second part of the code where FileOpener2 needs the path to the file (from line 58), it stalls.
This is surprising because if I write hardcode the path to the same file line 58 (var uri = var uri = encodeURI("path to file in the assets of the app"), it works.
Thanks for helping me resolve this.
Here is the full code (credits: Ghandi)
var entry, documentname, documentid, referenceID, callLogID, filePath, blob,cdr,fileObject;
var filename = "test.pdf";
$(document).ready(function() {
document.addEventListener("deviceready", onDeviceReady, false);
});
var fileURL = "";
var imagePath = "";
function onDeviceReady() {
sessionStorage.platform = device.platform;
var fileTransfer = new FileTransfer();
$('a[href$=\\.pdf]').click(function()
{
try {
alert('Hi boys');
var urinonencoded = this.href;
alert(urinonencoded + ' and voila');
if (sessionStorage.platform.toLowerCase() == "android") {
window.resolveLocalFileSystemURL(cordova.file.externalRootDirectory,onFileSystemSuccess, onError);
}
else {
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0,onFileSystemSuccess, onError);
}
}
catch(err) {
alert("ER - " + err.message);
}
});
function onError(e) {
alert("onError");
};
function onFileSystemSuccess(fileSystem) {
var entry="";
if (sessionStorage.platform.toLowerCase() == "android") {
entry=fileSystem;
}
else {
entry=fileSystem.root;
}
entry.getDirectory("Cordova", {create: true, exclusive: false}, onGetDirectorySuccess, onGetDirectoryFail);
};
function onGetDirectorySuccess(dir) {
dir.getDirectory("Sample_App", {create: true, exclusive: false}, onGetDirectorySuccess1, onGetDirectoryFail);
};
function onGetDirectorySuccess1(dir) {
cdr = dir;
dir.getFile(filename,{create:true, exclusive:false},gotFileEntry, errorHandler);
};
function gotFileEntry(fileEntry) {
/*var uri = encodeURI(myref);*/
var uri = urinonencoded;
alert (uri);
alert("dest - " + cdr.nativeURL+filename);
fileTransfer.download(uri,cdr.nativeURL+filename,
function(entry) {
openFile();
},
function(error) {
alert("download error source " + error.source);
alert("download error target " + error.target);
alert("upload error code" + error.code);
alert("error");
},
true);
};
function openFile() {
alert("URL - " + cdr.nativeURL+filename);
cordova.plugins.fileOpener2.open(
cdr.nativeURL+filename,
'application/pdf',
//'text/plain',
{
error : function(e) {
alert('Error status: ' + e.status + ' - Error message: ' + e.message);
},
success : function () {
}
}
);
};
function onFileSystemSuccessDelete(fileSystem) {
var entry="";
if (sessionStorage.platform.toLowerCase() == "android") {
entry=fileSystem;
}
else {
entry=fileSystem.root;
}
entry.getDirectory("Cordova/Sample_App", {create: true, exclusive: false}, onGetDirectorySuccessDelete, onGetDirectoryFail);
};
function onGetDirectorySuccessDelete(dir) {
dir.getFile(filename,{create: true, exclusive:false},gotFileEntryDelete, fail);
};
function gotFileEntryDelete(fileEntry) {
fileEntry.remove();
var uri = encodeURI("http://SERVER_IP:PORT/test.pdf");
fileTransfer.download(uri,cdr.nativeURL+filename,
function(entry) {
console.log("download complete: " + entry.toURL());
openFile();
},
function(error) {
alert("download error source " + error.source);
alert("download error target " + error.target);
alert("upload error code" + error.code);
alert("error");
},
true);
};
function fail(error){
alert("ec - " + error.code);
};
function errorHandler(e) {
var msg = '';
switch (e.code) {
case FileError.QUOTA_EXCEEDED_ERR:
msg = 'QUOTA_EXCEEDED_ERR';
break;
case FileError.NOT_FOUND_ERR:
msg = 'NOT_FOUND_ERR';
break;
case FileError.SECURITY_ERR:
msg = 'SECURITY_ERR';
break;
case FileError.INVALID_MODIFICATION_ERR:
msg = 'INVALID_MODIFICATION_ERR';
break;
case FileError.INVALID_STATE_ERR:
msg = 'INVALID_STATE_ERR';
break;
default:
msg = e.code;
break;
};
alert("Msg - " + msg);
};
function onGetDirectoryFail(error) {
alert("onGetDirectoryFail");
};
$('#delete').click(ClearDirectory);
function ClearDirectory() {
alert("delete");
if (sessionStorage.platform.toLowerCase() == "android") {
window.resolveLocalFileSystemURL(cordova.file.externalRootDirectory,onFileSystemDirSuccess, fail);
}
else {
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0,onFileSystemDirSuccess, fail);
}
}
function onFileSystemDirSuccess(fileSystem) {
var entry = "";
if (sessionStorage.platform.toLowerCase() == "android") {
entry=fileSystem;
}
else {
entry=fileSystem.root;
}
entry.getDirectory("Cordova",{create : true, exclusive : false},
function(entry) {
entry.removeRecursively(function() {
console.log("Remove Recursively Succeeded");
}, fail);
}, getDirFail);
}
function getDirFail(error){
alert("getDirFail - " + error.code);
};
}
I used:
<script>
$('a[href$=\\.pdf]').click(function() {
var myuri = this.href ;
alert(this.href);
/*alert just to make sure I got the right uri (which works fine)*/
cordova.plugins.fileOpener2.open(
'this.href', // You can also use a Cordova-style file uri: cdvfile://localhost/persistent/Download/starwars.pdf
'application/pdf',
{
error : function(e)
{
alert('Error status: ' + e.status + ' - Error message: ' + e.message);
},
success : function ()
{
alert('file opened successfully');
}
}
);
return false;
});
</script>
and it hangs (i have the plugin declared in the config.xml file and present in the assets.
Can you pinpoint my error(s)?
Many thanks

Basically the issue is with the way you pass the file path paramter you pass to fileopener's open function and nothing wrong with the plugin as such.
If you pass this object inside single quote like 'this.href', it will be treated as a plain string and that's the issue. So you can use the approach as Joerg suggested in his answer.
Do check out this basic working sample app that demonstrates Cordova file operations. It should help you get started.

'this.href' is wrong, try it this way:
$('a[href$=\\.pdf]').click(function () {
var myuri = this.href;
alert(this.href);
/*alert just to make sure I got the right uri (which works fine)*/
cordova.plugins.fileOpener2.open(
myuri, // You can also use a Cordova-style file uri: cdvfile://localhost/persistent/Download/starwars.pdf
'application/pdf',
{
error: function (e) {
alert('Error status: ' + e.status + ' - Error message: ' + e.message);
},
success: function () {
alert('file opened successfully');
}
}
);
return false;
});

To sum up the answers for this complex problem:
first: fileopener2 will not work on its own, it needs other plugins to fit the purpose of opening pdf files on android. The other plugins needed are mentioned in Gandhi's excellent demo app available here.
Second: it is esssentiel to use Gandhi's app.js file that combines the different calls to plugins.
Third there are a number of functions involved in that file. In it the path is hard-coded, so everything seems to work well. But if you must use a dynamic path, then it must be stated globally (in other words, do not use "var" but simply myvar = this.href.
Although I found the last bits on my own, all the credit goes to Gandhi's excellent demo app which is a treasure trove for new plugin users he made available on github. +1 :-)