Public libraries should generally avoid using characters outside the ASCII set in their code, to avoid it being loaded by users with an encoding that is different than their original one, and thus create issues. While a JavaScript source file can have any kind of encoding, JavaScript will then convert it internally to UTF before executing it. When a String contains actual textual data, each element is considered to be a single UTF code unit.
Notice that while both generate an accented e, they are two different strings, and s2 is considered to be 2 characters long:. The trigger file is zero byte file having the same name as the source data file. The trigger file provides the name of the source data file to be read by the downstream activities in this Oracle Integration flow.
A trigger file is used to in order to make sure the source application has written the data file completely before Oracle Integration tries to access the data file to read. The FTP Adapter in Oracle Integration does support the minimum age property, but sometimes the source application may be trying to append to a data file if there were many records. Since minimum age is not available for such scenarios, instead a trigger file is used.
The Oracle Integration flow was written with the requirement that the source data file is a compressed file. In this step you make use of the Stage Read feature in Oracle Integration to chunk read the data file. The outer for-loop shown in the diagram ensures that if there are multiple files as a part of the source ZIP file, each one is read and transformed to a separate FBDI-formatted file.
Although the ERP Adapter makes uses of Oracle Enterprise Resource Planning Cloud -provided web services internally, it obfuscates many complexities involved in the raw web services. The source and trigger files are archived for future reference on an FTP location. For example, you might use these files for re-submission purposes, if necessary.
Simplify the process to import file-based data for enterprise resource planning ERP. So it would send an empty HTML file, as well as the attached downloadable file. This works in Firefox; it receives the empty HTML file, fires the "load" event, then shows the "Save" dialog for the downloadable file. But it fails on IE and Safari; IE fires the "load" event but doesn't download the file, and Safari downloads the file with the wrong name and content-type and doesn't fire the "load" event.
A different approach might be to call to start the file creation, then poll the server until it's ready, then download the already-created file. But I'd rather avoid creating temporary files on the server. One possible solution uses JavaScript on the client. A very simple and lame one line solution is to use the window. Of course, if it takes too long and the user decides to do something else like reading emails the loading dialog will close. Based on Elmer's example I've prepared my own solution.
After elements click with defined download class it lets to show custom message on the screen. I've used focus trigger to hide the message. After each download click you will see message your report is creating, please wait The core problem is that the web browser does not have an event that fires when page navigation is cancelled but does have an event that fires when a page completes loading.
Anything outside of a direct browser event is going to be a hack with pros and cons. Without an appropriate built-in web browser event, there aren't any perfect solutions here. However, one of the four methods above will likely be a better fit than the others depending on your use-case.
Whenever possible, stream responses to the client on the fly instead of generating everything first on the server and then sending the response. It really depends on finding a library that supports streaming content. When streaming the response as soon as the request starts, detecting the start of the download won't matter as much because it will start almost right away.
Another option is to just output the download headers up front instead of waiting for all of the content to be generated first. Then generate the content and finally start sending to the client.
The user's built-in downloader will patiently wait until the data starts arriving. The downside is that the underlying network connection could timeout waiting for data to start flowing either on the client or server side. I wrote a simple JavaScript class that implements a technique similar to the one described in bulltorious answer.
I hope it can be useful to someone here. The GitHub project is called response-monitor. By default it uses spin. For more examples check the examples folder on the repository. If you're streaming a file that you're generating dynamically, and also have a realtime server-to-client messaging library implemented, you can alert your client pretty easily. The server-to-client messaging library I like and recommend is Socket.
After your server script is done generating the file that is being streamed for download your last line in that script can emit a message to Socket. On the client, Socket. The benefit of using this method over others is that you are able to detect a "true" finish event after the streaming is done.
For example, you could show your busy indicator after a download link is clicked, stream your file, emit a message to Socket. I realize most people reading answers to this question might not have this type of a setup, but I've used this exact solution to great effect in my own projects and it works wonderfully.
My solution with a cookie: - Client side: When submitting your form, call your javascript function to hide your page and load your waiting spinner. If the cookie is found, stop checking every ms, expire the cookie and call your function to come back to your page and remove the waiting spinner removeWaitingSpinner.
It is important to expire the cookie if you want to be able to download another file again! That cookie will be sent to the client when your file will be ready for download. I'm very late to the party but I'll put this up here if anyone else would like to know my solution:. I had a real struggle with this exact problem but I found a viable solution using iframes I know, I know.
It's terrible but it works for a simple problem that I had. I had an html page that launched a separate php script that generated the file and then downloaded it. On the html page, i used the following jquery in the html header you'll need to include a jquery library as well :. To break this down, jquery first launches your php script in an iframe. The iframe is loaded once the file is generated. Then jquery launches the script again with a request variable telling the script to download the file.
The reason that you can't do the download and file generation all in one go is due to the php header function. If you use header , you're changing the script to something other than a web page and jquery will never recognize the download script as being 'loaded'.
Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. Load Comments. What's New. Most popular in JavaScript. A very common requirement for web applications is a way to generate PDFs and make them available for download. This is typically to produce invoices, tickets, sales contracts, reports, and other documents personalized with customer data. In this article, we walk you through a simple, open-source method: html2pdf. At the end, we also consdier a JavaScript method for generating PDFs from MS Office file templates that will eliminate reliance on dev resources for template creation and maintenance, and doesn't require server-based conversion.
The html2pdf. As a result, html2pdf embeds directly client-side, in the browser. And unlike using the browser print function, html2pdf enables you to create an authentic download experience for your users. It works behind your interface and seems like a natural part of your web app. First, it uses html2canvas to convert your HTML to a canvas and renders that canvas to a static image. The simplest way to install html2pdf. Once html2pdf.
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