I've already managed to save a web page (x/html) successfully, but I'd also like to save the images and mp4 videos that are contained in it, for further visualization in offline mode.
I've got access to the iOS filesystem, so I save the html by obtaining the code through an AJAX request, and later saving it to a file.
I don't really know how to do the same with video and images. I have a server to which I can send queries from my app, so it shows exclusively the content I need to download, with the optimal headers in case its necessary. I just don't know how to "download" it from the client side (Javascript).
Thanks in advance for any help.
You can use a FileTransfer object to download a remote image to a local file.
This is the latest official sample snippet:
// !! Assumes filePath is a valid path on the device
var fileTransfer = new FileTransfer();
var uri = encodeURI("http://some.server.com/download.php");
fileTransfer.download(
uri,
filePath,
function(entry) {
console.log("download complete: " + entry.fullPath);
},
function(error) {
console.log("download error source " + error.source);
console.log("download error target " + error.target);
console.log("upload error code" + error.code);
},
false,
{
headers: {
"Authorization": "Basic dGVzdHVzZXJuYW1lOnRlc3RwYXNzd29yZA=="
}
}
);
You can only do it natively I'm afraid.
I'm doing it through a FileDownload PhoneGap Plugin that I wrote, using NSURLConnection. I pass in the url to download to the plugin through Javascript, and a target location (and it even gives me download progress).
Have not tested it yet, but the documentation at PhoneGap looks quite promising http://docs.phonegap.com/en/1.0.0/phonegap_file_file.md.html
I have used this snippet on my ios app project:
window.requestFileSystem = window.requestFileSystem || window.webkitRequestFileSystem;
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, success, fail);
var target_directory="";
function fail() {
//alert("failed to get filesystem");
}
function downloadImage(url, filename){
alert("download just started.");
try{
var ft = new FileTransfer();
ft.download(
url,
target_directory + filename,
function(entry) {
//alert("download complete!:" + entry.nativeURL ); //path of the downloaded file
},
function(error) {
//alert("download error" + error.code);
//alert("download error" + JSON.stringify(error));
}
);
}
catch (e){
//alert(JSON.stringify(e));
}
}
function success(fileSystem) {
target_directory = fileSystem.root.nativeURL; //root path
downloadImage(encodeURI("http://upload.wikimedia.org/wikipedia/commons/2/22/Turkish_Van_Cat.jpg"), "cat.jpg"); // I just used a sample url and filename
}
Related
I have more than 2 weeks that i tried to download file PDF in phonegap application using the File Transfer Plugin but it didn't work!! i make everything for that:
-installing the last version of phonegap
-installing the last version of File Transfer plugin
And this is the code to integrate in Javascript interface:
var fileTransfer = new FileTransfer();
fileTransfer.download(
"http://developer.android.com/assets/images/home/ics-android.png",
"file://sdcard/ics-android.png",
function(entry) {
alert("download complete: " + entry.fullPath);
},
function(error) {
alert("download error source " + error.source);
alert("download error target " + error.target);
alert("upload error code" + error.code);
});
But it seems wrong!!! I have like a result last three alerts in an android device:
-Download error source
-Download error target
-Upload error code
What i should doing?!!
Request you to check out my github page that contains a sample Cordova app which downloads PDF file from external URL and downloads it to the device.
This sample app is tested both in iOS and android devices. Hope it helps.
According to file transfer plugin documentation, first of all you need to create a file where you will store your remote data. Your code should look like this:
{
//call this after onDeviceReady event
...
var savePath = cordova.file.externalRootDirectory;
var fileName = "ics-android.png";
var url = encodeURI("http://developer.android.com/assets/images/home/ics-android.png");
downloadFile(savePath, fileName, url);
...
}
function downloadFile(savePath, fileName, remoteURL) {
window.resolveLocalFileSystemURL(savePath, function (dirEntry) {
console.log('file system open: ' + dirEntry.name);
createFile(dirEntry, fileName, function (fileEntry) {
download(remoteURL, fileEntry);
});
}, function (err) { alert(err) });
}
function createFile(dirEntry, fileName, callback) {
// Creates a new file or returns the file if it already exists.
dirEntry.getFile(fileName, { create: true, exclusive: false }, function (fileEntry) {
callback(fileEntry);
}, function (err) { alert(err) });
}
function download(remoteURL, fileEntry) {
var fileURL = fileEntry.toURL();
var fileTransfer = new FileTransfer();
fileTransfer.download(
remoteURL,
fileURL,
function (entry) {
alert("download complete: " + entry.fullPath);
},
function (error) {
alert("download error source " + error.source);
alert("download error target " + error.target);
alert("upload error code" + error.code);
});
}
Note that for path I use cordova.file.externalRootDirectory, so you get root sdcard path for file.
I am working on Cordova 2015 Apache cordova app . I want to recieve files from remote server such as https://www.w3.org/2011/web-apps-ws/papers/Nitobi.pdf and save it into my device.
$("#SaveFile").click(function () {
var _fileTransfer = new FileTransfer();
var filePath = cordova.file.dataDirectory + "Download/tost.pdf";
var uri = encodeURI("https://www.w3.org/2011/web-apps-ws/papers/Nitobi.pdf");
_fileTransfer .download(
uri,
filePath,
function (entry) {
alert("download complete: " + entry.fullPath);
},
function (error) {
alert("download error source " + error.source);
alert("download error target " + error.target);
alert("upload error code" + error.code);
},
false,
{
headers: {
"Authorization": "Basic dGVzdHVzZXJuYW1lOnRlc3RwYXNzd29yZA=="
}
}
);
});
When I 'v debugged it always go to error function
1st error describe the source:
2nd error describe the target:
. and i didn't get any thing in download folder .
here is a list of mobile paths from the w3c standard: http://wiki.phonegap.com/w/page/35605874/Planning%3A%20File%20API
and here is how you use it with phonegap: http://docs.phonegap.com/en/1.4.1/phonegap_file_file.md.html#LocalFileSystem
so you have to request the file system onSuccess you can use the path
here a full example: Writing and reading file in phonegap
I have been using phonegap and am trying to download wallpaper jpgs to the device camera roll. I have been testing this on the mobile phonegap app connecting to phonegap server. The code I am using goes as follows:
function DownloadFile(URL, Folder_Name, File_Name) {
if (URL == null && Folder_Name == null && File_Name == null) {
return;
}
else {
download(URL, Folder_Name, File_Name); //If available download function
}
}
function download(URL, Folder_Name, File_Name) {
//step to request a file system
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(); // Returns Fulpath of local directory
fp = fp + Folder_Name +"/"+ File_Name + ".jpg"; // fullpath and name of the file which we want to give
filetransfer(download_link, fp);
}
function onDirectorySuccess(parent) {
// Directory created successfuly
}
function onDirectoryFail(error) {
//Error while creating directory
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();
// File download function with URL and local path
fileTransfer.download(download_link, fp,
function (entry) {
console.log("cdvfile://localhost/persistent/" + fp);
alert("download complete: " + entry.fullPath.slice(1));
},
function (error) {
//Download abort errors or download failed errors
alert("download error source " + error.source);
alert("download error target " + error.target);
//alert("upload error code" + error.code);
}
);
}
What is interesting is that when I click my button that fires these methods I receive an alert saying download complete: file_name. However, there never appears an image in my camera roll. Is this an iOS issue? I've tried looking at this natively as opposed to simulating it with phonegap serve and it makes no difference.
I've also tried a file_path like so "cdvfile://localhost/persistent/"+Folder_name+"/"+ File_name+"."+ext;
with no different results.
In a difference post http://community.phonegap.com/nitobi/topics/file_download_not_working_properly_on_ios the answer for iOS was to use
<access origin="*" />
I made sure to use that in my config.xml file.
Does anyone have an idea as to what I am missing? This code has worked for others and oddly it states it completes correctly.
I have some client-side infos (a long associative array encoded with JSON) that I would like to send to the server with POST, to create an image based on those infos. The goal is to download that image using Phonegap primitives and saving it to the local storage.
Is there a way to do it?
Looking to the phonegap reference is there no way to send explicitely post data. Should I work with the parameter "header" (???) ?
Example:
var fileTransfer = new FileTransfer();
var uri = encodeURI("http://some.server.com/create_my_image.php");
fileTransfer.download(
uri,
filePath,
function(entry) {
console.log("download complete: " + entry.fullPath);
},
function(error) {
console.log("download error source " + error.source);
console.log("download error target " + error.target);
console.log("upload error code" + error.code);
},
false,
{
// HERE ADD SOME CODE TO SEND POST DATA?
headers: {
"???": "???"
}
}
);
Following this yet unanswered question I ran some tests to see where the problem is - in my side or in the server side.
So taking into account it might be a image codec problem, I have tried to upload a text/plain file to my server using post method.
First, I made sure the file exists by calling readAsText() method:
function onDeviceReady() {
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);
}
function gotFS(fileSystem) {
fileSystem.root.getFile("textfile.txt", null, gotFileEntry, fail);
}
function gotFileEntry(fileEntry) {
fileEntry.file(gotFile, fail);
}
function gotFile(file){
readDataUrl(file);
readAsText(file);
}
function readDataUrl(file) {
var reader = new FileReader();
reader.onloadend = function(evt) {
alert("Read as data URL");
alert(evt.target.result);
};
reader.readAsDataURL(file);
}
function readAsText(file) {
var reader = new FileReader();
reader.onloadend = function(evt) {
alert("Read as text");
alert(evt.target.result);
};
reader.readAsText(file);
}
function fail(evt) {
alert(evt.target.error.code);
}
After I get an alert with text file URL and text file content, I know this is my file. Now I'm uploading it:
function gotFile(file){
// alert('gotFile')
// readDataUrl(file);
// readAsText(file);
alert(file.fullPath)
uploadText(file.fullPath)
}
function uploadText(fileURI) {
alert('uploading file...')
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);
alert("http_status = " + error.http_status);
alert("upload error source " + error.source);
alert("upload error target " + error.target);
}
var options = new FileUploadOptions();
options.fileKey = "file";
options.fileName = fileURI.substr(fileURI.lastIndexOf('/') + 1);
options.mimeType = "text/plain";
var ft = new FileTransfer();
ft.upload(fileURI, encodeURI("https://mysecureurl.com/?filename="+options.fileName), win, fail, options);
}
I get fileTransfer error code 1 (file not found) and http status code 411 (malformed request).
I have all the permission including fileTransfer in my android project and also <access origin="*"/>. My server administrator says he gets the request but something is broken in the middle when I am sending file from phonegap (unlike normal browser requests) and he couldn't figure out what is it.
I am really stuck here. Is there any PhoneGap limitation I am not aware of? Or is there anyway to capture phone's http body request so I could debug it?
The problem is with content-type. Phonegap sets Content-Type: multipart/form-data;boundary=+++++ omitting the whitespace in between. Some servers can be picky with this. I solved the issue by rewriting this header and adding a whitespace as follows: Content-Type: multipart/form-data; boundary=+++++. Although this sounds like a hack, and solves the issue for me, this change needs to be incorporated into phonegap Android library in future releases.
It just happend on Android platform and fine on iOS, so try to set options.chunkedMode=false just on Android (the chunkedMode options default is true). see https://github.com/apache/cordova-plugin-file-transfer/pull/141#issuecomment-291776345