I am trying to load image files to my server. To do that I found this code as part of an ajax-example:
<!DOCTYPE html>
<html>
<head>
<title> Ajax JavaScript File Upload Example </title>
</head>
<body>
<!-- HTML5 Input Form Elements -->
<input id="fileupload" type="file" name="fileupload" />
<button id="upload-button" onclick="uploadFile()"> Upload </button>
<!-- Ajax JavaScript File Upload Logic -->
<script>
async function uploadFile() {
let formData = new FormData();
formData.append("file", fileupload.files[0]);
await fetch('/upload.php', {
method: "POST",
body: formData
});
alert('The file has been uploaded successfully.');
}
</script>
</body>
</html>
As I understand it, await fetch('/upload.php', tries to start a program named upload.php on the receiver, my server.
Aren't there supposed to be a domain-name? I mean, where is the upload-
file placed? This will only work if the user is also the owner of the domain, right?
Also, assume my program is on "https://DontTouchThis.com/uploads/", a subdirectory. Even users with this domain will not be able to start it.
I am confused.
Related
I need to build a cross platform app with multiple windows. So I would like to know how to use html templates in electron.
Based on a similar question and what I've seen, there's no built in html template language in Electron, which is actually great because it allows you to use any other template language.
I'm currently playing with ejs in Electron.
Below is my index.ejs template file:
<html lang="en">
<head>
<title>The Index Page</title>
</head>
<body>
<h1>Welcome, this is the Index page.</h1>
<% if (user) { %>
<h3>Hello there <%= user.name %></h3>
<% } %>
</body>
</html>
And below is a section of my main.js file where the above template is rendered and loaded onto the BrowserWindow. Note that I've left out most of the boilerplate code:
const ejs = require('ejs');
//... Other code
let win = new BrowserWindow({width: 800, height: 600});
//... Other code
// send the data and options to the ejs template
let data = {user: {name: "Jeff"}};
let options = {root: __dirname};
ejs.renderFile('index.ejs', data, options, function (err, str) {
if (err) {
console.log(err);
}
// Load the rendered HTML to the BrowserWindow.
win.loadURL('data:text/html;charset=utf-8,' + encodeURI(str));
});
I'll give some credit to this gist for helping me find the data:text/html;charset=utf-8 part of the url that can be used to load dynamic content.
UPDATE
I'm actually not using this anymore. It's faster to just load the default html and use the native DOM methods. The Electron Quickstart program shows how to do this nicely.
Another option is to do the templating during your build. Here is a simple example using gulp to add nonces to the CSP meta tag and the inline script.
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'nonce-<%= scriptNonce %>';">
<title>Basic Electron App</title>
</head>
<body>
<div id="app"></div>
<script type="application/javascript" nonce=<%= scriptNonce %>>
require('./index.js');
</script>
</body>
</html>
and in gulfile.js add the following to what you already have and make sure this task is included in your pipeline. You can also just update your current html task with the code below.
const template = require('gulp-template');
const uuidv4 = require('uuid/v4');
gulp.task('copy-html', () => {
// Create nonces during the build and pass them to the template for use with inline scripts and styles
const nonceData = {
scriptNonce: new Buffer(uuidv4()).toString('base64'),
styleNonce: new Buffer(uuidv4()).toString('base64')
};
return gulp.src('src/*.html')
.pipe(template(nonceData))
.pipe(gulp.dest('dist/'));
});
This is a very stripped down example. I have a more complete example at https://github.com/NFabrizio/data-entry-electron-app if anyone is interested, though there is still one warning when running the application because one of the packages I am using pulls in react-beautiful-dnd, which adds inline styles but does not currently accept nonces.
IN my Phonegap ios project i have an i frame and src of Iframe is a local html page within the same www folder . inside the html (IFrame source) one button and onlick listener. i need to open one website while clicking that button in InAppBrowser or in safari (new window). i cannot able to access phonegap methods from the html file (IFrame source), i includeed cordova on both html files, my source html page given bellow, this page is shown in an Iframe.
<html>
<head>
<script type="text/javascript" charset="utf-8" src="cordova.js"></script>
<script src="js/libs/jquery.js"></script>
<script src="adv.js"></script>
<script>
$(document).ready(function () {
$('#advArea').find('button').on('click', function (e) {
e.preventDefault();
var path = "http://www.google.com");
console.log(path);
//window.open(path,'__system');
//need to acces inApp Browser from here
})
});
</script>
</head>
<body>
<div id="advArea">
<button></button>
</div>
</body>
</html>
In your "parent" page where your iFrame is, create the below function
function popnew(path) {
navigator.app.loadUrl(link, { 'openExternal' : true });
}
then you call the above function for any button/link in the iFrame
<button onclick="javascript:parent.popnew('http://www.stackoverflow.com')"></button>
I'm trying to embed a column3d chart from fusioncharts in my MonoTouch project using UIWebView. I've added the necessary outlets and tested by using loadrequest to load a url and loadHtmlString to format a simple line of text. This works fine. I even tested that fusionchart works correctly on my browser using the below code and it does.
I have a folder named "charts" in my MonoTouch project that contains, Column3d.swf, jquery.min.js, FusionCharts.js, FusionCharts.HC.js and FusionCharts.HC.Charts.js.
In my
ViewDidLoad
string htmlString = "<html>
<head>
<script type=\"text/javascript\"src=\"Charts/jquery.min.js\">
</script>
<script type=\"text/javascript\" src=\"Charts/FusionCharts.js\">
</script>
<script type=\"text/javascript\" src=\"Charts/FusionCharts.HC.js\">
</script>
<script type=\"text/javascript\" src=\"Charts/FusionCharts.HC.Charts.js\">
</script>
</head>
<body>
<div id=\"chartContainer\">FusionCharts will load here!
</div>
<script type=\"text/javascript\"> var myChart = new FusionCharts( \"Charts/Column3D.swf\", \"myChartId\", \"400\", \"300\", \"0\", \"1\" );myChart.setXMLUrl(\"Charts/Data.xml\");
myChart.render(\"chartContainer\");
</script>
</body>
</html>";
this.webView.LoadHtmlString (htmlString, new NSUrl ("./Charts", true));
/*string htmlString = "<html><head></head><body><span style=\"font-weight: bold;\">This</span> " +
"<span style=\"text-decoration: underline;\">is</span> <span style=\"font-style: italic;\">some formatted</span> " +"<span style=\"font-weight: bold;text-decoration: underline;\">text!</span><br></body></html>";*/ //works
//this.webView.LoadHtmlString (htmlString, null); //works
Data.xml
<chart caption='Weekly Sales Summary'
xAxisName='Week' yAxisName='Amount' numberPrefix='$'>
<set label='Week 1' value='14400' />
<set label='Week 2' value='19600' />
<set label='Week 3' value='24000' />
<set label='Week 4' value='15700' />
</chart>
Can someone explain how I can get this working? Thanks in advance.
EDIT: I also tried
string htmlString = "<html><head> <title>Creating Pure JavaScript chart</title><script type=\"text/javascript\" src=\"charts/FusionCharts.js\"></script></head> <body><div id=\"chartContainer\">FusionCharts will load here!</div> <script type=\"text/javascript\">FusionCharts.setCurrentRenderer('javascript');var myChart = new FusionCharts( \"charts/Column3D.swf\", \"myChartId\", \"400\", \"300\", \"0\", \"1\" );myChart.setXMLData(\"<chart><set label='Data1' value='1' /></chart>\"); myChart.render(\"chartContainer\"); </script></body> </html>";
where i force the renderer to use javascript and set the chart parameters in the string to no avail. Anyone?
I solved my issue and thought I would post it should someone run into a similar issue.
The first thing I did was to right click on each of my javscript files ie FusionCharts.js, FusionCharts.HC.js and FusionCharts.HC.Charts.js and set their build type to content.
I then told Monotouch the build path for the charts would be contained in the charts folder by declaring
string path = NSBundle.MainBundle.BundlePath + "/Charts/";
Since I declare i am going to look in the Charts folder for related files, I then had to amend my htmlString by removing the "charts" keyword reference from all the "src" as below (since we are already lo.
string htmlString = "<html>
<head>
<script type=\"text/javascript\" src=\"jquery.min.js\">
</script>
<script type=\"text/javascript\" src=\"/FusionCharts.js\">
</script>
<script type=\"text/javascript\" src=\"/FusionCharts.HC.js\">
</script>
<script type=\"text/javascript\" src=\"FusionCharts.HC.Charts.js\">
</script>
</head>
<body>
<div id=\"chartContainer\">FusionCharts will load here!
</div>
<script type=\"text/javascript\"> var myChart = new FusionCharts(\"Column3D.swf\", \"myChartId\", \"400\", \"300\", \"0\", \"1\" );myChart.setXMLUrl(\"Charts/Data.xml\");
myChart.render(\"chartContainer\");
</script>
</body>
</html>";
I then call the loadHtml string method as below with the second argument pointing to the path that contains the javascript files.
this.webView.LoadHtmlString(htmlString, new NSUrl(path, true));
I even tested that fusionchart works correctly on my browser using the below code and it does.
Did you test this with an iOS device running Safari ?
project that contains, Column3d.swf,
That looks like a Flash file and iOS (and WebKit) does not support flash.
The website hints of an HTML5 version - so if they support flash-less browser then you should be able to do what you want using MonoTouch (or anything in iOS) using FusionChart. Otherwise you might need to look at other charting products (or a server-side solution).
FusionCharts had put out a blog post showing how to get HTML5 charts in iOS devices.
Have a look at it here - http://blog.fusioncharts.com/2012/02/create-charts-for-iphone-and-ipad-apps-using-fusioncharts-xt/
I m building a website where i need to update project counter whenever its updated in DB. when ever any user add a new project, the project counter should automatically update in browser, but i don't want to send ajax request to server again and again to get count from DB and then update counter in web browser.
I want something similar "how facebook notification updated" automatically without refreshing page or sending any ajax request, i know there are using some PUSH technology but i not sure how it works.
It will be very great if someone provide some Example code to achieve this.
Thanks...
Have you considered using SignalR?
http://www.hanselman.com/blog/AsynchronousScalableWebApplicationsWithRealtimePersistentLongrunningConnectionsWithSignalR.aspx
http://signalr.net/
Here is the sample code based on a quick POC after reading some SO replies and above articles. Hope it helps.
Create a new empty ASP.NET web application project
Add the SignalR package via NuGet
Add a UserCounter.cs with following code. Just need to inherit the class from Hub base class.
using SignalR.Hubs;
public class UserCounter : Hub { }
Add a Default.aspx with following code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
</head>
<body>
<form id="form1" runat="server">
<div>
Number of users currently online - <b><span id="noOfUsers">0</span> users</b>
<br />
<a target="_blank" href="UpdateNoOfUsers.aspx">Change number of users</a>
</div>
</form>
</body>
<script src="Scripts/jquery-1.6.4.js" type="text/javascript"></script>
<script src="Scripts/jquery.signalR.js" type="text/javascript"></script>
<script src="/signalr/hubs" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
var usc = $.connection.userCounter;
usc.noOfUsersUpdated = function (message) {
$('#noOfUsers').text(message);
};
$.connection.hub.start();
});
</script>
</html>
Add a UpdateNoOfUsers.aspx with following code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
</head>
<body>
<form id="form1" runat="server">
<div>
No. of users: <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
</div>
</form>
</body>
</html>
Add an event-handler for button-click for button in UpdateNoOfUsers.aspx
using SignalR;
using SignalR.Infrastructure;
using SignalR.Hosting.AspNet;
protected void Button1_Click(object sender, EventArgs e)
{
IConnectionManager connectionManager = AspNetHost.DependencyResolver.Resolve<IConnectionManager>();
dynamic clients = connectionManager.GetClients<UserCounter>();
clients.noOfUsersUpdated(TextBox1.Text);
}
Run the application after setting "Default.aspx" as the start up page
Click on the "Change number of users" link to open a new browser window
Enter a number in text-box and click on the button to see the value change in base window! Open this page in some other browser and see the same behaviour!
I decided to use jQuery UI for my autocomplete opposed to a plugin because I read that the plugins are deprecated. My overall goal is to have an autocomplete search bar that hits my database and returns users suggestions of city/state or zipcodes in a fashion similar to google. As of now I am not even sure that the .autocomplete function is being called. I scratched everything I had and decided to start with the basics. I downloaded the most recent version of jQuery UI from http://jqueryui.com/download and am trying to get the example that they use here http://jqueryui.com/demos/autocomplete/ to work. All the scripts that I have included seem to be connected at least linked through Dreamworks so I am fairly certain that the paths I have included are correct. The CSS and Javascripts that I have included are unaltered straight from the download. Below is my HTML code and my backend PHP code that is returning JSon formated data. Please help me. Maybe I need to include a function that deals with the JSon returned data but I am trying to follow the example although I see that they used a local array.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQueryUI Demo</title>
<link rel="stylesheet" href="css/ui-lightness/jquery-ui-1.8.17.custom.css" type="text/css" />
<script type="text/javascript" src ="js/jquery-1.7.1.min.js"></script>
<script type="text/javascript" src ="js/jquery-ui-1.8.17.custom.min.js"></script>
</script>
<script type="text/javascript">
$(document).ready(function() {
$("#tags").autocomplete({
source: "search_me.php"
});
});
</script>
</head>
<body>
<div class="demo">
<div class="ui-widget">
<label for="tags">Tags: </label>
<input id="tags" />
</div>
</div><!-- End demo -->
<div class="demo-description">
<p>The Autocomplete widgets provides suggestions while you type into the field. Here the suggestions are tags for programming languages, give "ja" (for Java or JavaScript) a try.</p>
<p>The datasource is a simple JavaScript array, provided to the widget using the source-option.</p>
</div><!-- End demo-description -->
</body>
</html>
Below the PHP part.
<?php
include 'fh.inc.db.php';
$db = mysql_connect(MYSQL_HOST, MYSQL_USER, MYSQL_PASSWORD) or
die ('Unable to connect. Check your connection parameters.');
mysql_select_db(MYSQL_DB, $db) or die(mysql_error($db));
$location = htmlspecialchars(trim($_GET['term'])); //gets the location of the search
$return_arr = array();
if(is_numeric($location)) {
$query = "SELECT
zipcode_id
FROM
user_zipcode
WHERE
zipcode_id REGEXP '^$location'
ORDER BY zipcode_id DESC LIMIT 10";
$result = mysql_query($query, $db) or die(mysql_error($db));
while($row = mysql_fetch_assoc($result)) {
extract($row);
$row_array['zipcode_id'] = $zipcode_id;
array_push($return_arr, $row_array);
}
}
mysql_close($db);
echo json_encode($return_arr);
?>
Thanks for the ideas. Here is an update.
I checked the xhr using firebug and made sure that it is responding thanks for that tip. also the above php code I hadn't initialized $return_arr so i took care of that. Also thanks for the clarification of the js required or rather not required. Now when I type in a zipcode a little box about a centimeter shows up underneath it but I can't see if anything is in there, I would guess not. I went to my php page and set it up to manually set the variable to "9408" and loaded the php page directly through my browser to see what it returned. This is what it returned.
[{"zipcode_id":"94089"},{"zipcode_id":"94088"},{"zipcode_id":"94087"},{"zipcode_id":"94086"},{"zipcode_id":"94085"},{"zipcode_id":"94083"},{"zipcode_id":"94080"}]
I then went to a JSON code validator at this url http://jsonformatter.curiousconcept.com/ at it informed me that my code is in fact returning JSON formatted data. Anymore suggestions to help me troubleshoot the problem would be terrific.
Wow after more research I stumbled across the answer on someone another post.
jquery autocomplete not working with JSON data
Pretty much the JSON returned data must contain Label or Value or both. Switched the zipcode_id to value in my $row_array and... boom goes the dynamite!
Your scripts (js files) references are not correct, should only be:
<!-- the jquery library -->
<script type="text/javascript" src ="js/jquery-1.7.1.min.js"></script>
<!-- the full compressed and minified jquery UI library -->
<script type="text/javascript" src ="js/jquery-ui-1.8.17.custom.min.js"></script>
The files "jquery.ui.core.js", "jquery.ui.widget.js" and "jquery.ui.position.js" are the separated development files, the jquery ui library is splitted into modules.
The file "jquery-ui-1.8.17.custom.min.js" contains them all, compressed and minified !
Concerning the data source, as stated in the "Overview" section of the Autocomplete documentation: when using a an URL, it must return json data, either of the form of:
an simple array of strings: ['string1', 'string2', ...]
or an array of objects with label (and a value - optionnal) property [{ label: "My Value 1", Value: "AA" }, ...]
I'm really not familiar with PHP so just make sure your php script returns one of those :-)