Can server tell between loading in browser and download

There are many other types of matches and we can daisy chain them. We can also control the order and the number of results returned. After the junior function gets the list of junior teams, it calls the render function, passing the original HttpRequest , an HTML template, and a "context" object defining the information to be included in the template. Obviously web frameworks can help you with a lot of other tasks. We discuss a lot more benefits and some popular web framework choices in the next article.

At this point you should have a good overview of the operations that server-side code has to perform, and know some of the ways in which a server-side web framework can make this easier. Skip to main content Skip to search Skip to select language Learn web development Server-side website programming Server-side website programming first steps Client-Server Overview Change language.

Previous Overview: First steps Next Now that you know the purpose and potential benefits of server-side programming we're going to examine in detail what happens when a server receives a "dynamic request" from a browser.

Prerequisites: Basic computer literacy. A basic understanding of what a web server is. Objective: To understand client-server interactions in a dynamic website, and in particular what operations need to be performed by server-side code.

This request includes: A URL identifying the target server and resource e. A method that defines the required action for example, to get a file or to save or update some data. POST : Create a new resource e. You might for example use a HEAD request to find out the last time a resource was updated, and then only use the more "expensive" GET request to download the resource if it has changed.

PUT : Update an existing resource or create a new one if it doesn't exist. Additional information can be encoded with the request for example, HTML form data. You always have a question mark? URL parameters are inherently "insecure" as they can be changed by users and then resubmitted. POST data. Active 3 months ago. Viewed k times. Does anyone have a better idea? Improve this question.

Riyaz Khan 1, 7 7 silver badges 21 21 bronze badges. Thanks Eric -- that's good to know. I won't waste any more time with that approach. NET folks. Show 2 more comments. Active Oldest Votes. The client algorithm: Generate a random unique token. Show the "waiting" indicator. Start a timer, and every second or so, look for a cookie named "fileDownloadToken" or whatever you decide. If the cookie exists, and its value matches the token, hide the "waiting" indicator.

If it has a non-empty value, drop a cookie e. Improve this answer. David Passmore 6, 4 4 gold badges 43 43 silver badges 68 68 bronze badges. A heads up for others: if document. For some time I thought the issue was the special 'localhost' domain cookie handling stackoverflow. May be that for others though so worth the read.

Do you think that it will, or cookies restrictions will compromise it? Brilliant - it wouldn't have occurred to me in years that you could include cookies as part of a file download. Thank you!! As others have pointed out, this solution only solves part of the problem, the waiting for the server to prepare the file time. The other part of the problem, which can be considerable depending on the size of the file and the connection speed, is how long it takes to actually get the whole file on the client.

And that is not solved with this solution. Show 16 more comments. Echilon 9, 28 28 gold badges silver badges bronze badges. This is a simple approach which is ideal for getting rid of a loading overlay for a file download which was triggered using onbeforeunload Thank you.

Safari, some IE versions, etc. Chrome and other such browsers auto-download the files where this condition will fail. Lucky that is only by default. It is entirely possible a user of Chrome will specify where downloads should be saved and hence see the dialog box — ESR. Add a comment. Don't eval code inside setTimeout 'getstatus ', ;. Use the fn directly: setTimeout getstatus, ; — Roko C. Jerzy Gebler Jerzy Gebler 9 9 silver badges 13 13 bronze badges.

What if the user clicks the window? The hide is not getting called in my case — Prashant Pimpale. Worked for me for a pdf download with only some line of codes — Chris. My case is working on JSP and click to download csv.

It works. Show 1 more comment. There are four known approaches to dealing with detecting when a browser download starts: Call fetch , retrieve the entire response, attach an a tag with a download attribute, and trigger a click event. Modern web browsers will then offer the user the option to save the already retrieved file. There are several downsides with this approach: The entire data blob is stored in RAM, so if the file is large, it will consume that much RAM.

For small files, this probably isn't a deal breaker. The user has to wait for the entire file to download before they can save it. They also can't leave the page until it completes. The built-in web browser file downloader is not used. Contact your ISP for more information.

If the DNS server is overloaded, you may be unable to view some or all websites. If neither Firefox nor another browser can load any websites, your problem is external to Firefox and you should seek support elsewhere. Grow and share your expertise with others. Answer questions and improve our knowledge base. This article describes problems where Firefox cannot load websites but other Web browsers such as Internet ExplorerInternet Explorer or Microsoft Are you having trouble getting a website to load?

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