I have a problem getting an image from filesystem. On iOS works fine.
First of all, I save a remote image in the filesystem with this function:
img.imagen = url from the remote image (e.g. http://onesite.es/img2.jpeg)
function descargarImagen(img, callback){
var path = img.imagen;
var filename = path.split("/").pop();
var xhr = Titanium.Network.createHTTPClient({
onload: function() {
// first, grab a "handle" to the file where you'll store the downloaded data
var f = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, filename);
f.write(this.responseData); // write to the file
Ti.API.debug("-- Imagen guardada: " + f.nativePath);
callback({path: f.nativePath});
},
timeout: 10000
});
xhr.open('GET', path);
xhr.send();
}
Now, I want to share this image creating an Android Intent:
args.image = f.nativePath(in the previous function)
var intent = null;
var intentType = null;
intent = Ti.Android.createIntent({
action: Ti.Android.ACTION_SEND
});
// add text status
if (args.status){
intent.putExtra(Ti.Android.EXTRA_TEXT, args.status);
}
// change type according to the content
if (args.image){
intent.type = "image/*";
intent.putExtraUri(Ti.Android.EXTRA_STREAM, args.image);
}else{
intent.type = "text/plain";
intent.addCategory(Ti.Android.CATEGORY_DEFAULT);
}
// launch intent
Ti.Android.currentActivity.startActivity(Ti.Android.createIntentChooser(intent, args.androidDialogTitle));
What I'm doing wrong?
Related
I'm tyring to upload a static json file into an indexedDB ONLY when an upgrade is needed (i.e. onupgradeneeded). I've search for answers to this repeatedly but have yet to see code examples of how to approach this.
My current code below gets the json file every time the page opens, which is of course inefficient since I only need to get the json file if the indexedDB has not yet been created or needs upgraded.
I tried putting the xhr.onload section into the end of the .onupgradeneeded function, but as many have noted, the .onsuccess gets called before the xhr.onload has completed.
var jsonUrl = '/path/to/hcLookup.json');
var req, db, hcObjectStore, objectStore, data, dataArr, trans, addreq, key;
var xhr = new XMLHttpRequest();
xhr.open("GET", jsonUrl, true);
xhr.type='json';
xhr.send();
xhr.onload = function(msg) {
data = msg.target.response;
req = window.indexedDB.open("hcLookup", 1);
req.onerror=function(event){console.log("onerror: " + event.target.errorCode)};
req.onsuccess = function(event){
console.log("ready.");
};
req.onupgradeneeded = function(event){
db = event.target.result;
objectStore = db.createObjectStore("hcLookup", {autoIncrement: true});
objectStore.createIndex("S", "S", {unique: false});
// make sure the objectStore creation is finished before adding data into it
objectStore.transaction.oncomplete = function (event) {
// Store values in the newly created objectStore.
trans = db.transaction(["hcLookup"], "readwrite");
hcObjectStore = trans.objectStore("hcLookup");
// Do something when all the data is added to the database.
trans.oncomplete = function (event) {
console.log("upgrading done!");
};
trans.onerror = function (event) {
console.log("bulk add onerror: " + event.target.errorCode)
};
//convert JSON to an strArray in order to add the dataArr into to the objectStore
dataArr = JSON.parse(data);
for (var i in dataArr) {
addreq = hcObjectStore.add(dataArr[i]);
}
};
};
};
I am using mongoskin to connect mongodb in my project. Now I have requirement to use GridFs to upload images, audio etc. I have one HTML form to upload these files.
I tried to find out example code to upload file using mongoskin however could't find any good one.
Please help.
After spending many hours; I am able to use mongoskin to upload file to Gridfs. Not sure if this is perfect code however sharing it here because I couldn't find any single working code on searching Google :-)
https://github.com/dilipkumar2k6/gridfs-mongoskin
var DBModule = require('./DBModule.js');
var Grid = require('gridfs-stream');
var mongoskin = require('mongoskin');
//Upload file to server and also update the database
exports.uploadContent = function (req, res) {
console.log('Calling uploadFile inside FileUploadService');
req.pipe(req.busboy);
req.busboy.on('file', function (fieldname, file, filename, encoding, mimetype) {
console.log('uploadFile after busboy fieldname: ' + fieldname + ", file : " + file + ", filename : " + filename);
// make sure the db instance is open before passing into `Grid`
var gfs = Grid(DBModule.db, mongoskin);
//Get metadata var host = req.headers['host'];
var metadata = {contentType: mimetype};
var writestream = gfs.createWriteStream({filename: filename, metadata: metadata});
file.pipe(writestream);
writestream.on('close', function (file) {
// return URL to acces the uploaded content
var path = "contents/" + file._id;
res.json({"path": path});
});
writestream.on('error', function (err) {
log.error({err: err}, 'Failed to upload file to database');
res.status(constants.HTTP_CODE_INTERNAL_SERVER_ERROR);
res.json({error: err});
});
});
};
//view file from database
exports.previewContent = function (req, res) {
var contentId = new DBModule.BSON.ObjectID(req.params.contentid);
console.log('Calling previewFile inside FileUploadService for content id ' + contentId);
var gs = DBModule.db.gridStore(contentId, 'r');
gs.read(function (err, data) {
if (!err) {
//res.setHeader('Content-Type', metadata.contentType);
res.end(data);
} else {
log.error({err: err}, 'Failed to read the content for id ' + contentId);
res.status(constants.HTTP_CODE_INTERNAL_SERVER_ERROR);
res.json({error: err});
}
});
};
Try this to store the data using gridfs (by default uses mongoskin). It worked for me.
var ObjectID = require('mongodb').ObjectID,
GridStore = require('mongodb').GridStore;
exports.saveMedia = function(db, media, next) {
console.log(media)
db.open(function (err, db) {
// Create a file and open it
var gridStore = new GridStore(db, new ObjectID(), "w");
gridStore.open(function (err, gridStore) {
// Write some content to the file
gridStore.write(new Buffer(media), function (err, gridStore) {
// Flush the file to db
gridStore.close(function (err, fileData)
//returns filename
next(null, fileData)
});
});
});
});
}
I'm able to create the JSZip object in my code, but I'm having trouble saving that to local storage in my windows 8 app. The examples I'm able to find set the browser's location.href to trigger a download, which isn't really an option for me.
I've included my code below. The zip file I end up with is invalid and can't be opened. Any help would be appreciated.
For reference: JSZip
function _zipTest() {
var dbFile = null;
var zipData = null;
Windows.Storage.StorageFile.getFileFromPathAsync(config.db.path)
.then(function (file) {
dbFile = file;
return Windows.Storage.FileIO.readBufferAsync(file);
})
.then(function (buffer) {
//Read the database file into a byte array and create a new zip file
zipData = new Uint8Array(buffer.length);
var dataReader = Windows.Storage.Streams.DataReader.fromBuffer(buffer);
dataReader.readBytes(zipData);
dataReader.close();
var localFolder = Windows.Storage.ApplicationData.current.localFolder;
return localFolder.createFileAsync(dbFile.displayName.concat('.zip'), Windows.Storage.CreationCollisionOption.replaceExisting)
})
.then(function (file) {
//Write the zip data to the new zip file
var zip = new JSZip();
zip.file(dbFile.displayName, zipData);
var content = zip.generate();
return Windows.Storage.FileIO.writeTextAsync(file, content);
});
}
you can do something on these lines. This code seem to generate valid .zip file in the temp folder.
var zip = new JSZip();
var storage = Windows.Storage;
storage.StorageFile.getFileFromApplicationUriAsync(new Windows.Foundation.Uri('ms-appx:///images/logo.png')).then(function ongetfile(file)
{
var blob = MSApp.createFileFromStorageFile(file);
var url = URL.createObjectURL(blob, { oneTimeOnly: true });
return WinJS.xhr({ url: url, responseType: 'arraybuffer' });
}).then(function onreadbuffer(req)
{
var b = req.response;
zip.file('logo.png', b);
return storage.ApplicationData.current.temporaryFolder.createFileAsync('a.zip', storage.CreationCollisionOption.replaceExisting);
}).then(function onnewfile(out)
{
var content = zip.generate({ type: 'uint8array' });
return storage.FileIO.writeBytesAsync(out, content);
}).then(null, function onerror(error)
{
// TODO: error handling
});
I want to go to select a file from sdcard and upload it to server. is it possible to access the sdcard in android via phonegap as how we are picking a image from gallery and uploading. I went through samples but all are specifying the file name also like eg: mnt/sdcard/read.txt. But i want to goto only sdcard so that user can select his own file is it possible to do.
U can easily do that its very easy
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, onFileSystemSuccessUpload, fail);
function onFileSystemSuccessUpload(fileSystem) {
// get directory entry through root and access all the folders
var directoryReader = fileSystem.root.createReader();
// Get a list of all the entries in the directory
directoryReader.readEntries(successReader,fail);
}
function successReader(entries) {
var i;
for (i=0; i<entries.length; i++) {
//alert(entries[i].name);
if(entries[i].isDirectory==true)
{
var directoryReaderIn = entries[i].createReader();
directoryReaderIn.readEntries(successReader,fail);
}
if(entries[i].isFile==true)
{
entries[i].file(uploadFile, fail);
}
}
};
function uploadFile(file) {
var target=""; //the url to upload on server
var ft = new FileTransfer(),path = "file://"+ file.fullPath,name = file.name;
ft.upload(path, target, win, fail, { fileName: name });
// var ft = new FileTransfer();
//ft.upload(file.fullPath, target, win, fail, options);
function win(r) {
alert("Code = " + r.responseCode);
alert("Response = " + r.response);
alert("Sent = " + r.bytesSent);
}
function fail(error) {
alert("An error has occurred: Code = " + error.code);
}
}
I'm running a website, where I'd like to upload files with Drag 'n Drop, using the HTML5 File API and FileReader. I have successfully managed to create a new FileReader, but I don't know how to upload the file. My code (JavaScript) is the following:
holder = document.getElementById('uploader');
holder.ondragover = function () {
$("#uploader").addClass('dragover');
return false;
};
holder.ondragend = function () {
$("#uploader").removeClass('dragover');
return false;
};
holder.ondrop = function (e) {
$("#uploader").removeClass('dragover');
e.preventDefault();
var file = e.dataTransfer.files[0],
reader = new FileReader();
reader.onload = function (event) {
//I shoud upload the file now...
};
reader.readAsDataURL(file);
return false;
};
I also have a form (id : upload-form) and an input file field (id : upload-input).
Do you have any ideas?
P.S. I use jQuery, that's why there is $("#uploader") and others.
Rather than code this from scratch, why not use something like html5uploader, which works via drag n drop (uses FileReader etc.): http://code.google.com/p/html5uploader/
EDIT: apparently we respondents are supposed to tend to our answers forever more, for fear for down-votes. The Google Code link is now dead (four years later), so here's a jQuery plugin that is very similar: http://www.igloolab.com/jquery-html5-uploader/
You'll want to extract the base64 encoded file contents and ajax them over tot the server.
JavaScript
var extractBase64Data;
extractBase64Data = function(dataUrl) {
return dataUrl.substring(dataUrl.indexOf(',') + 1);
};
// Inside the ondrop event
Array.prototype.forEach.call(event.dataTransfer.files, function(file) {
var reader;
if (!file.type.match(options.matchType)) {
return;
}
reader = new FileReader();
reader.onload = function(event) {
var contentsBase64;
if (event.target.readyState === FileReader.DONE) {
contentsBase64 = extractBase64Data(event.target.result);
return $.post(someURL, {
contentsBase64: contentsBase64
});
}
};
reader.readAsDataURL(file);
});
CoffeeScript
extractBase64Data = (dataUrl) ->
dataUrl.substring(dataUrl.indexOf(',') + 1)
# Inside the ondrop event
Array::forEach.call event.dataTransfer.files, (file) ->
return unless file.type.match(options.matchType)
reader = new FileReader()
reader.onload = (event) ->
if event.target.readyState == FileReader.DONE
contentsBase64 = extractBase64Data(event.target.result)
$.post someURL,
contentsBase64: contentsBase64
reader.readAsDataURL(file)