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I want to upload an image to folder using javascript and generic handler in c#

function ajaxFileUpload(mode) {
var fupl = 'fileToUpload';
var fileName = $('#fileuploadbrand').val();
if (fileName == "" || fileName == null)//if user doesn't select an image
{
alert('Please Select An image');
}
else {
var vars = fileName.split("."); //get file extension.
if (vars[1].toString().toLowerCase() != "jpg")
{//check the file extension.
alert('The image format is not valid !');
return false;
}
$.ajax({
type: 'POST',
url: '../handlers/BandPictureHandler.ashx',
data: { Action: mode },
cache: false,
fileElementId: 'fileToUpload',
contentType: false,
processData: false,
success: function (data) {
if (data.result == "successed")
alert('Image Uploaded');
},
error: function (data) {
console.log("error");
console.log(data);
}
});
}
return false;
}
This is my javascript code. Where Using debugging I can see that file
is coming and it also hits the handler. But In the handler, It is not going to the "new" case. It always redirect to the default case. Below I am giving the handler code. Please help to to store the image in folder using javascript. If there is any easy step,then you can also suggest it to me.
public class BandPictureHandler : IHttpHandler {
public void ProcessRequest(HttpContext context)
{
HttpRequest request = context.Request;
HttpResponse response = context.Response;
string action = request["Action"];
switch (action)
{
case "NEW":
string result = "failed";
try
{
string fileName = SaveCaper(context);
result = "successed";
response.Write("{\"result\":" + result.ToString().ToLower() + "}");
}
catch
{
response.Write("{\"result\":" + result.ToString().ToLower() + "}");
}
break;
default:
break;
}
}
private string SaveCaper(HttpContext context)
{
string fileName = string.Empty;
string path = context.Server.MapPath("~/assets/media/brand/");
if (!Directory.Exists(path))
Directory.CreateDirectory(path);
try
{
var file = context.Request.Files[0];
if (HttpContext.Current.Request.Browser.Browser.ToUpper() == "IE")
{
string[] files = file.FileName.Split(new char[] { '\\' });
fileName = files[files.Length - 1];
}
else
{
fileName = file.FileName;
}
string strFileName = fileName;
fileName = Path.Combine(path, fileName);
try
{
file.SaveAs(fileName);
}
catch (Exception exp)
{
//log the exception
}
}
catch (Exception exp)
{
//log the exception
}
return fileName;
}
public bool IsReusable {
get {
return false;
}
}
}

How to limit size of chunk incoming from rest server on nodejs http module?

I am requesting a rest server from nodejs by using nodejs request module.
I want to cancel stream if incoming data size is out of allowed limit.the purpose here is to ensure that my network is not locked.
My code example is as follows;
var http = require("http");
async function httpRequest({
host,
method,
port,
path
} = params, data) {
if (method.toUpperCase() === "GET") {
let query = "";
data = JSON.parse(data);
for (var key in data) {
if (data.hasOwnProperty(key)) {
let value = data[key];
console.log(key + " -> " + value);
query = query
.concat("&")
.concat(key)
.concat("=")
.concat(value);
}
}
if (query) {
query = "?".concat(query.substring(1));
}
path = encodeURI(path.concat(query));
console.log("path : " + path);
}
var opts = {
hostname: host,
port: port,
path: path,
method: method,
timeout: 30 * 1000,
headers: {
"Content-Type": "application/json"
}
};
return new Promise(function (resolve, reject) {
const req = http.request(opts, function (response) {
console.log("Status Code : " + response.statusCode);
if (response.statusCode < 200 || response.statusCode >= 300) {
req.end();
return reject("Fetch data failed = " + response.statusCode);
}
var str = "";
response.on("data", function (chunk) {
console.log("chunk : " + chunk);
str += chunk;
if (str.length > 256) {
req.abort();
reject(
new Error(
"The size of the incoming data is larger than the allowable limit."
)
);
}
});
response.on("end", function () {
console.log("\n Result from web service : ", str);
try {
let jsonData = JSON.parse(str);
if (jsonData.status) {
if (jsonData.status.toLowerCase === "success") {
if (!("result" in jsonData)) {
reject("Json Structure Error");
}
} else if (jsonData.status.toLowerCase === "error") {
if (!jsonData.error) {
reject("Json Structure Error");
}
}
resolve(jsonData);
} else {
reject("Json Structure Error");
}
} catch (error) {
reject("Response json error : " + error);
}
});
});
if (method.toUpperCase() !== "GET" && data) {
req.write(data);
}
//req bitti
req.on("timeout", function () {
console.log("timeout! " + opts.timeout / 1000 + " seconds expired");
req.abort();
});
req.on("error", function (err) {
console.log("Error : " + err);
if (err.code === "ECONNRESET") {
req.abort();
console.log("Timeout occurs : " + err);
reject(new Error("Timeout occurs : " + err));
} else if (err.code === "ENOTFOUND") {
req.abort();
console.log("Address cannot be reachable : " + err);
reject(new Error("Address cannot be reachable : " + err));
} else {
req.abort();
reject(new Error(err));
}
});
req.end();
});
}
let data = JSON.stringify({
username: "monetrum",
password: "123456",
name: "Loremipsumdolorsitamet,consecteturadipiscingelit" +
".Aeneaninaliquamodio,egetfac"
});
let params = {
host: "127.0.0.1",
method: "GET",
port: 3010,
path: "/login"
};
httpRequest(params, data);
So farr so good.But There is a problem.I am controlling incoming data.Size of data I allowed must not greater than 256 Bytes.But first fetch of chunk is larger than allowed size.So my size control is nonsense.Is there a way to handle it.Is it possible to limit size of chunk. Thanks in advance.

The 'readable' event
You want to use the readable event instead of the data event:
var byteCount = 0;
var chunkSize = 32;
var maxBytes = 256;
req.on('readable', function () {
var chunks = [];
var data;
while(true) {
data = this.read(chunkSize);
if (!data) { break; }
byteCount += data.byteLength;
if (byteCount > maxBytes) {
req.abort();
break;
}
chunks.push(data);
}
// do something with chunks
});
req.on('abort', function () {
// do something to handle the error
});
Since your question is very specific I made the example a little more generic so that hopefully others will be able to glean from it as well.
See https://nodejs.org/api/stream.html#stream_event_readable
However...
The Network Does't Care
However, you're going to get more data than that. TCP packet size is 64k. Over non-gigabit ethernet that gets MTU truncated to 1500 bytes (1.5k).
There's nothing that you can do to prevent the network activity from happening other than closing the connection, and you can't get less than 1.5k of data per data event unless there is less than 1.5k of data being sent (or crazy network issues happen, which you have no control over).t
P.S.
I'd recommend that you use a code editor, like VSCode. It's very difficult to read code that has mixes of tabs and spaces and different blocks at different levels. It will suggest plugins that can help you catch mistakes earlier and reformat your code so that it's easier for others (and yourself) to read it.
https://code.visualstudio.com/
https://code.visualstudio.com/docs/languages/javascript
https://marketplace.visualstudio.com/items?itemName=esbenp.prettier-vscode

JQuery check the file size from inside a function

So I have these Jquery code where the function will check the file extension and the file size from the input file. The checking for the file extension works fine, but the file size checking is not working, can you guys help me with this problem?
$(document).ready(function () {
/* Some other code
*/
var fileExtension = ['jpeg', 'jpg', 'png', 'pdf'];
var status = false;
function checkFile(fileinput){
if ($.inArray(fileinput.split('.').pop().toLowerCase(), fileExtension) == -1) {
alert("Tolong upload file dengan extensi: " + fileExtension.join(', '));
fileinput.value = "";
return status = false;
}
if (fileinput[0].size > 1048576) {
alert("The maximum file size is 1 mb");
fileinput.value = "";
return status = false;
}
else {
return status = true;
}
}
$('#btn_IdentitasKTP\\/Paspor').on('click', function () {
$('#file_IdentitasKTP\\/Paspor').trigger('click')
});
$('#file_IdentitasKTP\\/Paspor').change(function () {
var fileinput = $('#file_IdentitasKTP\\/Paspor').val();
checkFile(fileinput);
if (status == true) {
var file_name = this.value.replace(/\\/g, '/').replace(/.*\//, '');
$('#text_IdentitasKTP\\/Paspor').val(file_name);
status = false;
}
});
});

Try this :
$('#file_IdentitasKTP\\/Paspor').change(function () {
var fileinput = this.files;
...
you can check file size by :
console.log(fileinput[0].size)

For example to upload image by AJAX. You will simply write this code. You will size with object. it will return size of that object.
$(document).ready(function(e) {
$("#uploadimage").on('submit', (function(e) {
e.preventDefault();
formdata = new FormData(this);
if (formdata[0].size = < 1000) {
$.ajax({
url: "PHp File name path", // Url to which the request is send
type: "POST", // Type of request to be send, called as method
data: formdata, // Data sent to server, a set of key/value pairs (i.e. form fields and values)
contentType: false, // The content type used when sending data to the server.
cache: false, // To unable request pages to be cached
processData: false, // To send DOMDocument or non processed data file it is set to false
success: function(data) // A function to be called if request succeeds
{
$('#loading').hide();
$("#message").html(data);
}
});
} else {
alert("You can not Upload this file Please resize this image.")
}
}));

This is the updated code for this question.
$(document).ready(function () {
/* Some other code
*/
var fileExtension = ['jpeg', 'jpg', 'png', 'pdf'];
var status = false;
function checkFile(fileinput){
if ($.inArray(fileinput[0].name.split('.').pop().toLowerCase(), fileExtension) == -1) {
alert("Tolong upload file dengan extensi: " + fileExtension.join(', '));
fileinput.value = "";
return status = false;
}
if (fileinput[0].size > 1048576) {
alert("Tolong upload file dengan ukuran dibawah 1mb");
fileinput.value = "";
return status = false;
}
else {
return status = true;
}
}
$('#btn_IdentitasKTP\\/Paspor').on('click', function () {
$('#file_IdentitasKTP\\/Paspor').trigger('click')
});
$('#file_IdentitasKTP\\/Paspor').change(function () {
var fileinput = this.files;
checkFile(fileinput);
if (status == true) {
var file_name = this.value.replace(/\\/g, '/').replace(/.*\//, '');
$('#text_IdentitasKTP\\/Paspor').val(file_name);
status = false;
}
});
});

How to Open a URL/link in between a running ajax call and destroy all running ajax call?

I am working on Web page having an ajax call to the server and from the server(Controller) again a WCF service is called(which takes time) for fetching some data.
Inside server(Controller) i called to service in Parallel by using Task and async-await.
My problem is:
after opening the page that has code for calling the controller and WCF service, I can't redirect my tab/page to another URL by clicking on anchor tab present in UI. until ajax call result is retrieved.
UI CODE:
$(function () {
if (AutomationType.toLowerCase() === "desktop") {
$.ajax({
async: true,
url: "/" + AutomationType + "/Home/GetAllController",
data: { "hostName": hostname},
type: 'POST',
dataType: 'json'
}).success(function (response) {
debugger;
})
}
});
i have tried to abort the ajax call also as below,
$(function() {
$.xhrPool = [];
$.xhrPool.abortAll = function() {
$(this).each(function(i, jqXHR) { // cycle through list of recorded connection
jqXHR.abort(); // aborts connection
$.xhrPool.splice(i, 1); // removes from list by index
});
}
$.ajaxSetup({
beforeSend: function(jqXHR) { $.xhrPool.push(jqXHR); }, // annd connection to list
complete: function(jqXHR) {
var i = $.xhrPool.indexOf(jqXHR); // get index for current connection completed
if (i > -1) $.xhrPool.splice(i, 1); // removes from list by index
}
});
})
// Everything below this is only for the jsFiddle demo
$('a').click(function () {
$.xhrPool.abortAll();
});
Server(Controller) Code
public async Task<JsonResult> GetAllController(string hostName)
{
string IsControllerRunning = string.Empty;
var currentHost = string.Empty;
var currentRunId = string.Empty;
var currentStatus = string.Empty;
var ipDns = string.Empty;
Stopwatch sw = new Stopwatch(); sw.Start();
List<List<ExecutionStepResult>> returnresultArray = new List<List<ExecutionStepResult>>();
List<Task<IEnumerable<ExecutionStepResult>>> taskList = new List<Task<IEnumerable<ExecutionStepResult>>>();
Debug.WriteLine("starting 1 " + sw.Elapsed);
var resultArray = hostName.TrimEnd('^').Split('^');
for (int i = 0; i < resultArray.Length; i++)
{
string host = resultArray[i];
Task<IEnumerable<ExecutionStepResult>> task = new Task<IEnumerable<ExecutionStepResult>>(() => getServiceResultByTask(host));
task.Start();
taskList.Add(task);
}
foreach (Task<IEnumerable<ExecutionStepResult>> taskitem in taskList)
{
try
{
Debug.WriteLine("calling task " + sw.Elapsed);
IEnumerable<ExecutionStepResult> val = await taskitem;
returnresultArray.Add(val.ToList());
}
catch (Exception ex)
{
returnresultArray.Add(new List<ExecutionStepResult>() { new ExecutionStepResult() { IsError = true, ErrorMessage="true" ,CustomMessage = ex.Message.ToString() } });
}
}
for (int i = 0; i < resultArray.Length; i++)
{
string host = resultArray[i];
currentHost = host.Split('|').GetValue(1).ToString();
currentStatus = host.Split('|').GetValue(2).ToString();
currentRunId = host.Split('|').GetValue(0).ToString();
ipDns = host.Split('|').GetValue(3).ToString();
List<ExecutionStepResult> exeResponse = returnresultArray[i].ToList();
if (exeResponse.Count() > 0 && (currentStatus != "3" || (currentStatus == "3" && exeResponse[i].ErrorMessage == "true")))
IsControllerRunning += host + "|" + exeResponse[0].CustomMessage + "^";
else if (exeResponse.Count() > 0 && currentStatus == "3" && exeResponse[0].ErrorMessage == "false")
IsControllerRunning += host;
}
Debug.WriteLine("end " + sw.Elapsed);
sw.Stop();
return Json(IsControllerRunning, JsonRequestBehavior.AllowGet);
}
calling WCF service:
private IEnumerable getServiceResultByTask(string hosts)
{
using (var service = new RemoteCommandClient())
{
try
{
System.Threading.Thread.Sleep(15000);
string currentHost = hosts.Split('|').GetValue(1).ToString();
string currentStatus = hosts.Split('|').GetValue(2).ToString();
string currentRunId = hosts.Split('|').GetValue(0).ToString();
string ipDns = hosts.Split('|').GetValue(3).ToString();
IEnumerable<ExecutionStepResult> result = service.ExecuteRemoteWithRunId("CHECK_CURRENT_EXECUTION", Convert.ToInt32(currentRunId));
return result;
} catch (Exception ex)
{ throw ex; }
}
}
Still, I don't know how to open /redirect a page URL if an ajax call is running on the server. I am using signalR in the same page also. Please help.

How to find out why some files won't upload?

Using the code below, I can successfully upload an xlsx file without any issues, but when I try to upload a csv version of the same file it never hits the controller. So I tried other csv files and some of them work fine and others don't hit the controller.
No errors are raised so I don't really know what to do to troubleshoot this further. I'm not even sure how to isolate whether the issue is happening after asp.net gets the request but before it hits the controller, or whether it's before it even gets posted. Any suggestions on what I can look into next?
Html:
<div>
<input type="file" name="file" id="uploadFile" />
</div>
JavaScript:
$('#uploadFile').on('change', function (e) {
var files = e.target.files;
if (files.length > 0) {
if (window.FormData !== undefined) {
var data = new FormData();
for (var x = 0; x < files.length; x++)
data.append("file" + x, files[x]);
$.ajax({
type: "POST",
url: '/Home/UploadFile',
contentType: false,
processData: false,
data: data,
success: function (result) {
if (result)
alert('File uploaded.');
else
alert('Error uploading file :(');
},
error: function (xhr, status, p3, p4) {
var err = "Error " + " " + status + " " + p3 + " " + p4;
if (xhr.responseText && xhr.responseText[0] == "{")
err = JSON.parse(xhr.responseText).Message;
}
});
} else {
alert("This browser doesn't support HTML5 file uploads :(");
}
}
});
Controller:
[HttpPost]
public JsonResult UploadFile()
{
try
{
if(Request.Files.Count == 0)
throw new ArgumentException("No file to upload!");
var fileContent = Request.Files[0];
if(fileContent != null && fileContent.ContentLength > 0)
{
Session["ImportFileId"] = ImportFiles.Save(fileContent.InputStream);
return Json(true);
}
else
return Json(false);
}
catch(Exception)
{
Response.StatusCode = (int)HttpStatusCode.BadRequest;
return Json(false);
}
}