`How to resolve page timeout issue caused by looping when using Response.Redirect?`

Question

`How to resolve page timeout issue caused by looping when using Response.Redirect?`

Currently, I am in the process of building a page that involves creating a large number of files within a folder. Once the task is completed, I compress the folder into a zip file and provide the client with a download link. To keep track of these files, I save the list of files in a database, process one file at a time, mark it as complete in the database, and then use Response.Redirect to return to the same page. The process continues until all entries are processed.

Unfortunately, I am facing issues with my page timing out. I am exploring options such as adding code to prevent timeouts or potentially using JavaScript for redirection. My goal is to avoid rendering the page to the client repeatedly.

I have attempted setting the timeout in the page init class by using Server.ScriptTimeout = 60 * 60 * 60, but this did not resolve the issue.

javascript vb.net

Answer 1

Answer №1

As mentioned in the comment above, opting for an asynchronous approach is advisable. Avoiding redirection is crucial to prevent UI blocking.

A sample Javascript pseudo code snippet:

$(folders).forEach(function(folder) {
    var jqxhr = $.post("example.php", function(data) {
        $("#idofyourdownloadlink").text("Processing");
    })
    .done(function(data) {
        $("#idofyourdownloadlink").append("<a href="+data+">Download</a>");
    })
    .fail(function() {
        $("#idofyourdownloadlink").text("Failed to process");
    })
});

If your server faces overload, consider implementing time-outs on requests using a while loop.

In C#, handle processing and provide the download link without triggering new redirects.

Answer 2

As mentioned in the comment above, opting for an asynchronous approach is advisable. Avoiding redirection is crucial to prevent UI blocking.

A sample Javascript pseudo code snippet:

$(folders).forEach(function(folder) {
    var jqxhr = $.post("example.php", function(data) {
        $("#idofyourdownloadlink").text("Processing");
    })
    .done(function(data) {
        $("#idofyourdownloadlink").append("<a href="+data+">Download</a>");
    })
    .fail(function() {
        $("#idofyourdownloadlink").text("Failed to process");
    })
});

If your server faces overload, consider implementing time-outs on requests using a while loop.

In C#, handle processing and provide the download link without triggering new redirects.

Answer 3

Answer №2

To optimize your website's performance, consider creating individual promises for each folder. Once all promises are resolved, you can proceed to display the links on your page. Here is a simple example:

var foldersList = ['folder1', 'folder2'];
var listOfPromises = [];

function addFolderToDatabase(folder) {
    return new Promise(function (resolve, reject) {
        $.post("index.php",{"folder":folder})
            .done(function(response) {
                resolve(response);
            })
            .fail(function(error) {
                reject(error);
            })
    });
}

$(foldersList).each(function(){
    var promise = addFolderToDatabase(this);
    listOfPromises.push(promise);
});

Promise.all(listOfPromises).then(function(){
   // Perform desired actions here
});

Cheers!

Answer 4

To optimize your website's performance, consider creating individual promises for each folder. Once all promises are resolved, you can proceed to display the links on your page. Here is a simple example:

var foldersList = ['folder1', 'folder2'];
var listOfPromises = [];

function addFolderToDatabase(folder) {
    return new Promise(function (resolve, reject) {
        $.post("index.php",{"folder":folder})
            .done(function(response) {
                resolve(response);
            })
            .fail(function(error) {
                reject(error);
            })
    });
}

$(foldersList).each(function(){
    var promise = addFolderToDatabase(this);
    listOfPromises.push(promise);
});

Promise.all(listOfPromises).then(function(){
   // Perform desired actions here
});

Cheers!

`How to resolve page timeout issue caused by looping when using Response.Redirect?`

Answer №1

Answer №2

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