I recently converted one of my controllers to a background Task, which returns an HTTPResponseMessage once the thread is completed. The issue i am facing is to get the download to pop up after the task is done. I have implemented SignalR as well for tracking the progress. Here is my controller code:
public async Task<IHttpActionResult> GetReportaync([FromUri] ReportRequestViewModel request)
{
var token = UnitOfWork.Start();
HostingEnvironment.QueueBackgroundWorkItem(CancellationToken =>
{
using (token)
{
try
{
HubFunctions.UpdateReportProgress(username, status);
var parameters = request.ToReportParams();
var report = ReportFactory.CreateReport(request.ReportExportType, IsVA());
var docStream = report.BuildReport(parameters);
if (request.SaveReport)
{
SaveDocumentToAmazon(request, report.FileName, docStream);
}
var GeneratedReport = GetFileAsResponseMessage(docStream.ToArray(), report.FileName, true);
ReportCacheDto generateReportDto1 = new ReportCacheDto()
{
Report = GeneratedReport,
Status = CacheConstants.Progress.Completed.ToString()
};
bool completed = SaveCacheReportProgress(key, generateReportDto1);
Request.CreateResponse(GeneratedReport);
HubFunctions.UpdateReportResult(new GenerateReportDto() { Message = "Import Completed", Success = true, Report = GeneratedReport }, username);
}
catch(Exception e)
{
LogHandler.LogError("An error occured", e);
Request.CreateResponse(HttpStatusCode.InternalServerError, e);
HubFunctions.UpdateReportResult(new GenerateReportDto() { Message = "Import Failed", Success = false, Report = Report }, username);
}
}
});
return Ok(new GenerateReportDto
{
Message = "Generate Started",
Success = true
});
}
Next is the return method called GetFileasResponse:
protected HttpResponseMessage GetFileAsResponseMessage(byte[] fileData, string filename, bool download = false)
{
var response = new HttpResponseMessage(HttpStatusCode.OK);
fileContent = fileData;
string fileType = string.Empty;
string extension = Path.GetExtension(filename.ToLower());
if(mediaTypeHeaderValueTypes.ContainsKey(extension))
{
fileType = mediaTypeHeaderValueTypes[extension].ToString();
}
else
{
fileType = "application/octet-stream";
}
Action<Stream, HttpContent, TransportContext> writeToStream = WriteToStream;
response.Content = new PushStreamContent(writeToStream, new MediaTypeHeaderValue(fileType));
var dispositionHeader = download ? "attachment" : "inline";
response.Content.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue(dispositionHeader)
{
/*
* See here:
* https://stackoverflow.com/questions/93551/how-to-encode-the-filename-parameter-of-content-disposition-header-in-http
* and here:
* https://msdn.microsoft.com/en-us/library/4fkewx0t(v=vs.110).aspx
*/
FileName = HttpUtility.UrlPathEncode(filename) // encodes " " as %20 which is what we want.
};
return response;
}
The issue really stems from the front end, because i can return the response file in my console log but i dont know how to have it to pop up as a download. Here is what i have attempted
ScorecardReportVM.prototype.ConnectToSignalRHub_ReportResult = function () {
var self = this;
var hub = $.connection.ReportResult;
hub.client.UpdateStatus = function (response) {
self.SetImportRunning(false);
var link = document.createElement('a');
link.href = response.Report;
document.body.appendChild(link);
link.click();
console.log(response);
};
};
Essentially signalR once completed returns:
public bool Success { get; set; }
public string Message { get; set; }
public HttpResponseMessage Report { get; set; }
Now my issue is how do i get the Report parameter to pop up as a download?
Related
I am working on a java plugin that is supposed to recieve some info from a js vue3 program and then do a URL post operation, and then return some of the info found back to the js code. I am using capacitor and android. This is my error message:
2022-08-22 13:46:23.773 27544-27544/org.theguy.GptEtc E/Capacitor/Console: File: http://localhost/js/app.6577adf2.js - Line 1 - Msg: Uncaught (in promise) SyntaxError: Unexpected token o in JSON at position 1
I think this means that something other than valid JSON is being delivered to the js code. I know that the app is delivering info to the java android class. This is some of my java code.
#CapacitorPlugin(name = "URLPOST")
public class PluginURLPost extends Plugin {
#PluginMethod()
public void post(PluginCall call) {
String post_url = call.getString("post_url", "");
String bearer = call.getString("bearer", "pipeline_");
JSObject ret = new JSObject();
try {
String value = this.doPost(post_url, bearer);
System.out.println("value " + value);
Gson gson = new Gson();
JsonReader reader = new JsonReader(new StringReader(value));
ResultPreview preview = gson.fromJson(reader, ResultPreview.class);
String val = preview.getResult_preview()[0][0];
val = "result string here."; // <-- add this for easy testing
ret.put("response_text", val.replace("\n", "\\n"));
System.out.println("response here: " + val);
}
catch (Exception e) {
e.printStackTrace();
}
//call.setKeepAlive(true);
call.resolve(ret);
}
OkHttpClient client = new OkHttpClient();
public static final MediaType JSON
= MediaType.parse("application/json; charset=utf-8");
String doPost(String post_url, String bearer ) throws IOException {
// ... do some post request here ...
return response_body;
}
}
class ResultPreview {
#SerializedName("result_preview")
String [][] result_preview ;
public void setResult_preview(String[][] result) {
this.result_preview = result;
}
public String[][] getResult_preview() {
return this.result_preview;
}
}
This is some of my js code.
import { registerPlugin } from "#capacitor/core";
const URLPOST = registerPlugin("URLPOST");
const request = {
"line": line,
"pipeline_model": details[engine]["app_model"].trim(),
"bearer": details[engine]["api_key"].trim(),
"post_url": details[engine]["url"].trim(),
"length": 25,
"top_k": 50
};
console.log("request", request);
var {response_text} = await URLPOST.post(request);
console.log("response_text 1",response_text);
I don't know what to do.
I tried this, and things work better. I don't know if this is the ultimate solution.
#PluginMethod()
public void post(PluginCall call) {
bridge.saveCall(call); // <-- add this
call.release(bridge); // <-- add this
String pipeline_model = call.getString("pipeline_model", "pipeline_");
String post_url = call.getString("post_url", "");
JSObject ret = new JSObject();
try {
String value = this.doPost(post_url);
Gson gson = new Gson();
JsonReader reader = new JsonReader(new StringReader(value));
ResultPreview preview = gson.fromJson(reader, ResultPreview.class);
String val = preview.getResult_preview()[0][0];
ret.put("response_text", val.replace("\n", "\\n"));
System.out.println("response here: " + val);
}
catch (Exception e) {
e.printStackTrace();
}
call.resolve(ret);
}
This is not found on the capacitor site, but instead I found it digging around the internet.
I need a C# code that will trigger a nprinting task. On our server we are not allowed to evoke html file, hence I can't use javascript attached.
The attached works just need to translate it to .net as I can't use html on our server
Javascripts below works just fine
<html>
<head>
</head>
<body>
<h1>NPrinting API task starter</h1>
<script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
<script type="text/javascript">
(function(){
console.log("started")
var taskIDs=[
"f3ebd873-b310-4a22-a269-24ce81b8ce74"
]
$.ajax({
url: 'URL:4993/api/v1/login/ntlm',
xhrFields: {
withCredentials: true
}
}).done(function(data) {
console.log(data);
for(var i=0;i<taskIDs.length;i++){
$.ajax({
type: "POST",
url: 'URL:4993/api/v1/tasks/'+taskIDs[i]+'/executions',
xhrFields: {
withCredentials: true
}
}).done(function(data) {
console.log("task "+i);
console.log(data);
if(i==taskIDs.length)
open(location, '_self').close();
});
}
});
})();
<!-- open(location, '_self').close(); -->
</script>
</body>
</html>
C# code which I can't complete all the below works but doesn't start the task.
//Create the HTTP Request (authenticate) and add required headers
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL:4993/api/v1/login/ntlm");
CookieContainer cookies = new CookieContainer();
request.CookieContainer = cookies;
request.Method = "GET";
request.UserAgent = "Windows";
request.Accept = "application/json";
// specify to run as the current Microsoft Windows user
request.UseDefaultCredentials = true;
try
{
// make the web request and return the content
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader responseReader = new StreamReader(response.GetResponseStream());
string sResponseHTML = responseReader.ReadToEnd();
Console.WriteLine(sResponseHTML);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
//Create second HTTP request (get list of apps) and add required headers
HttpWebRequest secondRequest = (HttpWebRequest)WebRequest.Create(#"URL:4993/api/v1/tasks/f3ebd873-b310-4a22-a269-24ce81b8ce74/executions");
//assign cookie to request to maintain session
secondRequest.CookieContainer = cookies;
secondRequest.Method = "POST";
secondRequest.UserAgent = "Windows";
secondRequest.Accept = "application/json";
// specify to run as the current Microsoft Windows user
secondRequest.UseDefaultCredentials = true;
Thanks
I found a solution to the above, request.
Nprinting API task to run from C#
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
namespace Post_Request_API
{
class Program
{
static void Main(string[] args)
{
//Create the HTTP Request (authenticate) and add required headers
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(#"URL:4993/api/v1/login/ntlm");
//Assign custom SSL certificate validation method if certificate is untrusted
//request.ServerCertificateValidationCallback += (sender, certificate, chain, sslPolicyErrors) => true;
CookieContainer cookies = new CookieContainer();
request.CookieContainer = cookies;
request.Method = "GET";
request.UserAgent = "Windows";
request.Accept = "application/json";
//Specify to run as the current Microsoft Windows user
request.UseDefaultCredentials = true;
try
{
// make the web request and return the content
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader responseReader = new StreamReader(response.GetResponseStream());
string sResponseHTML = responseReader.ReadToEnd();
Console.WriteLine(sResponseHTML);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
//Create second HTTP request to add a new user and required headers
HttpWebRequest secondRequest = (HttpWebRequest)WebRequest.Create(#"URL:4993/api/v1/tasks/f3ebd873-b310-4a22-a269-24ce81b8ce74/executions");
//Assign custom SSL certificate validation method if certificate is untrusted
//secondRequest.ServerCertificateValidationCallback += (sender, certificate, chain, sslPolicyErrors) => true;
//Add the XSRF token
secondRequest.Headers.Add("X-XSRF-TOKEN", cookies.GetCookies(request.RequestUri)["NPWEBCONSOLE_XSRF-TOKEN"].Value);
secondRequest.CookieContainer = cookies;
secondRequest.Method = "POST";
secondRequest.UserAgent = "Windows";
secondRequest.Accept = "application/json";
secondRequest.ContentType = "application/json";
//Specify to run as the current Microsoft Windows user
secondRequest.UseDefaultCredentials = true;
//Prepare JSON object to send to the remote server
JsonUser user = new JsonUser();
user.ID = "";
user.type = "";
user.task = "";
user.created = "";
user.lastUpdate = "";
user.completed = "";
user.progress = "";
user.status = "Enqueued";
user.result = "";
user.priority = "";
string jUserString = JsonConvert.SerializeObject(user);
using (var streamWriter = new StreamWriter(secondRequest.GetRequestStream()))
{
streamWriter.Write(jUserString);
streamWriter.Flush();
streamWriter.Close();
}
try
{
HttpWebResponse response2 = (HttpWebResponse)secondRequest.GetResponse();
StreamReader responseReader2 = new StreamReader(response2.GetResponseStream());
string sResponseHTML2 = responseReader2.ReadToEnd();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
public class JsonUser
{
public string ID { get; set; }
public string type { get; set; }
public string task { get; set; }
public string created { get; set; }
public string lastUpdate { get; set; }
public string completed { get; set; }
public string progress { get; set; }
public string status { get; set; }
public string result { get; set; }
public string priority { get; set; }
}
}
}
My web app currently allows users to upload media one-at-a-time using the following:
var fd = new FormData(document.forms[0]);
fd.append("media", blob); // blob is the image/video
$.ajax({
type: "POST",
url: '/api/media',
data: fd
})
The media then gets posted to a WebApi controller:
[HttpPost, Route("api/media")]
public async Task<IHttpActionResult> UploadFile()
{
if (!Request.Content.IsMimeMultipartContent("form-data"))
{
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
}
string mediaPath = await _mediaService.UploadFile(User.Identity.Name, Request.Content);
return Ok(mediaPath);
}
Which then does something along the lines of:
public async Task<string> UploadFile(string username, HttpContent content)
{
var storageAccount = new CloudStorageAccount(new StorageCredentials(accountName, accountKey), true);
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer imagesContainer = blobClient.GetContainerReference("container-" + user.UserId);
var provider = new AzureStorageMultipartFormDataStreamProvider(imagesContainer);
await content.ReadAsMultipartAsync(provider);
var filename = provider.FileData.FirstOrDefault()?.LocalFileName;
// etc
}
This is working great for individual uploads, but how do I go about modifying this to support batched uploads of multiple files through a single streaming operation that returns an array of uploaded filenames? Documentation/examples on this seem sparse.
public class AzureStorageMultipartFormDataStreamProvider : MultipartFormDataStreamProvider
{
private readonly CloudBlobContainer _blobContainer;
private readonly string[] _supportedMimeTypes = { "images/png", "images/jpeg", "images/jpg", "image/png", "image/jpeg", "image/jpg", "video/webm" };
public AzureStorageMultipartFormDataStreamProvider(CloudBlobContainer blobContainer) : base("azure")
{
_blobContainer = blobContainer;
}
public override Stream GetStream(HttpContent parent, HttpContentHeaders headers)
{
if (parent == null) throw new ArgumentNullException(nameof(parent));
if (headers == null) throw new ArgumentNullException(nameof(headers));
if (!_supportedMimeTypes.Contains(headers.ContentType.ToString().ToLower()))
{
throw new NotSupportedException("Only jpeg and png are supported");
}
// Generate a new filename for every new blob
var fileName = Guid.NewGuid().ToString();
CloudBlockBlob blob = _blobContainer.GetBlockBlobReference(fileName);
if (headers.ContentType != null)
{
// Set appropriate content type for your uploaded file
blob.Properties.ContentType = headers.ContentType.MediaType;
}
this.FileData.Add(new MultipartFileData(headers, blob.Name));
return blob.OpenWrite();
}
}
Assuming your AzureStorageMultipartFormDataStreamProvider is similar to the same class mentioned on this blog, that is actually already processing multiple files if there are multiple files in the request.
So all you need to do is change your UploadFile to return a IEnumerable<string> and change your controller to have mediaPath as such.
So your MediaService would have:
var filenames = provider.FileData.Select(x => x.LocalFileName).ToList(); ;
return filenames;
And your controller would have:
var mediaPaths = await _mediaService.UploadFile(User.Identity.Name, Request.Content);
return Ok(mediaPaths);
Since you don't post the related codes with the AzureStorageMultipartFormDataStreamProvider class.
So I create a custom AzureStorageMultipartFormDataStreamProvider which inherits from the MultipartFileStreamProvider to enable the web api upload batched uploads of multiple files.
In the AzureStorageMultipartFormDataStreamProvider we could override the ExecutePostProcessingAsync method.
In this method, we could get the upload file data, then we could upload these data to the azure storage.
More details, you could refer to below codes. The total Controller.
public class UploadingController : ApiController
{
public Task<List<FileItem>> PostFile()
{
if (!Request.Content.IsMimeMultipartContent("form-data"))
{
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
}
var multipartStreamProvider = new AzureStorageMultipartFormDataStreamProvider(GetWebApiContainer());
return Request.Content.ReadAsMultipartAsync<AzureStorageMultipartFormDataStreamProvider>(multipartStreamProvider).ContinueWith<List<FileItem>>(t =>
{
if (t.IsFaulted)
{
throw t.Exception;
}
AzureStorageMultipartFormDataStreamProvider provider = t.Result;
return provider.Files;
});
}
public static CloudBlobContainer GetWebApiContainer(string containerName = "webapi-file-container")
{
// Retrieve storage account from connection-string
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
"your connection string");
// Create the blob client
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference(containerName);
// Create the container if it doesn't already exist
container.CreateIfNotExists();
// Enable public access to blob
var permissions = container.GetPermissions();
if (permissions.PublicAccess == BlobContainerPublicAccessType.Off)
{
permissions.PublicAccess = BlobContainerPublicAccessType.Blob;
container.SetPermissions(permissions);
}
return container;
}
}
public class FileItem
{
/// <summary>
/// file name
/// </summary>
public string Name { get; set; }
/// <summary>
/// size in bytes
/// </summary>
public string SizeInMB { get; set; }
public string ContentType { get; set; }
public string Path { get; set; }
public string BlobUploadCostInSeconds { get; set; }
}
public class AzureStorageMultipartFormDataStreamProvider : MultipartFileStreamProvider
{
private CloudBlobContainer _container;
public AzureStorageMultipartFormDataStreamProvider(CloudBlobContainer container)
: base(Path.GetTempPath())
{
_container = container;
Files = new List<FileItem>();
}
public List<FileItem> Files { get; set; }
public override Task ExecutePostProcessingAsync()
{
// Upload the files to azure blob storage and remove them from local disk
foreach (var fileData in this.FileData)
{
var sp = new Stopwatch();
sp.Start();
string fileName = Path.GetFileName(fileData.Headers.ContentDisposition.FileName.Trim('"'));
CloudBlockBlob blob = _container.GetBlockBlobReference(fileName);
blob.Properties.ContentType = fileData.Headers.ContentType.MediaType;
//set the number of blocks that may be simultaneously uploaded
var requestOption = new BlobRequestOptions()
{
ParallelOperationThreadCount = 5,
SingleBlobUploadThresholdInBytes = 10 * 1024 * 1024 ////maximum for 64MB,32MB by default
};
//upload a file to blob
blob.UploadFromFile(fileData.LocalFileName, options: requestOption);
blob.FetchAttributes();
File.Delete(fileData.LocalFileName);
sp.Stop();
Files.Add(new FileItem
{
ContentType = blob.Properties.ContentType,
Name = blob.Name,
SizeInMB = string.Format("{0:f2}MB", blob.Properties.Length / (1024.0 * 1024.0)),
Path = blob.Uri.AbsoluteUri,
BlobUploadCostInSeconds = string.Format("{0:f2}s", sp.ElapsedMilliseconds / 1000.0)
});
}
return base.ExecutePostProcessingAsync();
}
}
The result like this:
I would checkout uploading the media directly to the blob storage after getting the SAS token for all your files from the Web API in one request. Upload the files using a promise and http get from your client, which will parallelize the upload.
Which will be your right design and approach. Which will also increase your upload speed and reduce the latency.
I have a problem with my created zip file. I am using Java 8. I tried to create a zip file out of a byte array, which contains two or more Excel files. . So, I thought everything is alright. I do an ajax call for create and download my file but i don't have the popup for download my zip and i don't have error.
This is my javascript:
function getFile() {
$.ajax({
type: "POST",
url: "/support-web/downloadCSV",
dataType: "json",
contentType: 'application/json;charset=UTF-8',
data: jsonfile,
success: function (data) {
console.log("in sucess");
window.location.href="/support-web/downloadCSV/"+data
},
error:function (xhr, ajaxOptions, thrownError){
console.log("in error")
}
});
}
This is my Controller:
#Controller
#RequestMapping(value = "/downloadCSV")
public class DownloadCSVController {
private static final int BUFFER_SIZE = 4096;
#RequestMapping(method = RequestMethod.POST)
#ResponseBody
public void downloadCSV(HttpServletRequest request, HttpServletResponse response, #RequestBody String json)
throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try (ZipOutputStream zos = new ZipOutputStream(baos)) {
int i = 0;
for (String url : parts) {
i++;
URL uri = new URL(url);
HttpURLConnection httpConn = (HttpURLConnection) uri.openConnection();
int responseCode = httpConn.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
String fileName = "";
String disposition = httpConn.getHeaderField("Content-Disposition");
String contentType = httpConn.getContentType();
int contentLength = httpConn.getContentLength();
if (disposition != null) {
// extracts file name from header field
int index = disposition.indexOf("filename=");
if (index > 0) {
fileName = disposition.substring(index + 9, disposition.length());
}
} else {
// extracts file name from URL
fileName = url.substring(url.lastIndexOf("/") + 1, url.length());
}
System.out.println("Content-Type = " + contentType);
System.out.println("Content-Disposition = " + disposition);
System.out.println("Content-Length = " + contentLength);
System.out.println("fileName = " + fileName);
// opens input stream from the HTTP connection
InputStream inputStream = httpConn.getInputStream();
ZipEntry entry = new ZipEntry(fileName + i + ".csv");
int length = 1;
zos.putNextEntry(entry);
byte[] b = new byte[BUFFER_SIZE];
while ((length = inputStream.read(b)) > 0) {
zos.write(b, 0, length);
}
zos.closeEntry();
inputStream.close();
System.out.println("File downloaded");
}
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
// this is the zip file as byte[]
int size = baos.toByteArray().length;
byte[] reportContent = baos.toByteArray();
// Write file to response.
OutputStream output = response.getOutputStream();
output.write(reportContent);
output.close();
response.setContentType("application/force-download");
response.setContentLength((int)size);
response.setHeader("Content-Transfer-Encoding", "binary");
response.setHeader("Content-Disposition","attachment; filename=\"test.zip\"");//fileName)
System.out.println("FIN TELECHARGEMENT");
}
}
Problem:
The Browser not should open a download box
The response isn't handled in the error or in the success (ajax)
So what do I wrong or what is the proper way to do this?
In my navigator you can see the response with my file but download box not should open
You need to do two things:
Set headers before writing anything to response stream.
Remove output.close(); you should not do that. Stream is opened and closed by container.
Second point actually not affecting your problem, its just an advice. You can read more about it here Should one call .close() on HttpServletResponse.getOutputStream()/.getWriter()?.
I'm using the code below for downloading with the web API in ASP.NET.
When I'm trying to click the download button, it calls the API.
After executing the "DownloadFile"-function, the download dialog box isn't coming .
[HttpGet]
public HttpResponseMessage DownloadFile(string DownloadFilePath)
{
HttpResponseMessage result = null;
var localFilePath = HttpContext.Current.Server.MapPath(DownloadFilePath);
// check if parameter is valid
if (String.IsNullOrEmpty(DownloadFilePath))
{
result = Request.CreateResponse(HttpStatusCode.BadRequest);
}
// check if file exists on the server
else if (!File.Exists(localFilePath))
{
result = Request.CreateResponse(HttpStatusCode.Gone);
}
else
{// serve the file to the client
result = Request.CreateResponse(HttpStatusCode.OK);
result.Content = new StreamContent(new FileStream(localFilePath, FileMode.Open, FileAccess.Read));
result.Content.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("attachment");
result.Content.Headers.ContentDisposition.FileName = DownloadFilePath;
}
return result;
}
I didn't get any exception from the code above, but the dialog box for downloading the file isn't coming.
Here is the code, I am using and it works great. I hope it will give you an idea
....
var fileBytes = Helper.GetFileBytes(filePath);//convert file to bytes
var stream = new MemoryStream(fileBytes);
resp.Content = new StreamContent(stream);
resp.Content.Headers.ContentType = new MediaTypeHeaderValue("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
resp.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") { FileName = filerequest.FileName };
resp.Content.Headers.Add("Content-Encoding", "UTF-8");
return resp;
And, here is the code for GetFileBytes method,
public static byte[] GetFileBytes(string filePath)
{
var fileInfo = new FileInfo(filePath);
if (fileInfo.Exists)
{
return File.ReadAllBytes(fileInfo.FullName);
}
return null;
}