AWS lambda function and s3 in Asp NetCore - amazon-web-services

Question

I am new in AWS and Asp NetCore. Help me to find the solution.
I am using Asp NetCore, how should I use lambda function to upload clipped file in s3?
I have a IFormFile but I want to use s3 url instead of IFormFile and upload in s3 bucket. I have used ffmpeg library to cut the video and I want to send url of s3 using lambda function and upload the output of clipped video file again in s3 bucket directory that i created in s3 console.
using Abp.UI;
using FFmpeg.NET;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using System;
using System.IO;
using Amazon.S3;
using System.Threading.Tasks;
using Amazon.S3.Transfer;
using Amazon.S3.Model;
using IdentityModel.Client;
using Amazon;
using System.Net.Http;
namespace VideoSlicer.About
{
public class AboutAppService : IAboutAppService
{
//Assigning readonly IHostingEnvironment
private readonly IHostingEnvironment _appEnvironment;
private readonly string bucketName = "videoslicerpuru";
private static readonly RegionEndpoint bucketRegion = RegionEndpoint.Region;
/*
private const string newFile = "QQ.mp4";
private const string newFile1 = "637156754716419260QQ.mp4";
private const string filePath = #"C:\Users\Purushottam\Downloads\VideoSlicer\5.1.1\aspnet-core\src\VideoSlicer.Web.Host\wwwroot\images\";*/
private static IAmazonS3 client;
//Making Constructor and passin IHostingEnvironment
public AboutAppService(IHostingEnvironment appEnvironment)
{
_appEnvironment = appEnvironment;
}
//Function which upload video and slice video accordingly start time and finish time given by the user
public async Task UploadImage(IFormFile file, string Start, string Finish)
{
HttpClient cli = new HttpClient();
cli.DefaultRequestHeaders.ExpectContinue = false;
try
{
//Taking out the extension of the file
var convertedExtension = file.FileName.Substring(file.FileName.LastIndexOf("."));
//Comparing the extension whether uploaded file is video or not
if (convertedExtension != ".mp4" && convertedExtension != ".flv" && convertedExtension != ".3GP" && convertedExtension != ".OGG" && convertedExtension != ".AVI" && convertedExtension != ".WMV ")
{
throw new UserFriendlyException("Please Select Valid Video file to clip!!");
}
//Checking if the file is null or has not been selected any file
if (file == null || file.Length == 0)
{
throw new UserFriendlyException("Please Select any file.");
}
//declaring web root path
string path_Root = _appEnvironment.WebRootPath;
//setting path root and saving video to the given path
string pathOfVideo = path_Root + "\\video\\";
string path_to_Video = path_Root + "\\images\\" + file.FileName;
using (var stream = new FileStream(path_to_Video, FileMode.Create))
{
await file.CopyToAsync(stream);
}
client = new AmazonS3Client("AccessKey", "SecretKey", bucketRegion);
TransferUtility utility = new TransferUtility(client);
TransferUtilityUploadRequest request = new TransferUtilityUploadRequest();
string nameOfFile = file.FileName.ToString();
string videoPath = path_to_Video.ToString();
await utility.UploadAsync(videoPath, bucketName, nameOfFile);
Console.WriteLine("Upload 2 completed");
//To cut video, using ffmpeg media file where the video is saved
var input = new MediaFile(path_to_Video);
//The output of the clipped video and saving in a different folder
string nameFile = DateTime.Now.Ticks + file.FileName;
string nameBucket = bucketName + "/videoslice/";
var output = new MediaFile(path_Root + "/video/" + nameFile);
client = new AmazonS3Client(bucketRegion);
//making the object of Engine using ffmpeg application file
var ffmpeg = new Engine("C:\\ffmpeg\\bin\\ffmpeg.exe");
//making object of Conversion Option of ffmpeg
var options = new ConversionOptions();
//Converting string to double
var startTime = Convert.ToDouble($"{Start}");
var finishTime = Convert.ToDouble($"{Finish}");
//clipping video by given user input
options.CutMedia(TimeSpan.FromSeconds(startTime), TimeSpan.FromSeconds(finishTime - startTime));
await ffmpeg.ConvertAsync(input, output, options);
string clipPath = path_Root + "\\video\\" + nameFile;
//Checking if start time is greater then finish time
if (startTime > finishTime)
{
throw new UserFriendlyException("Please Enter Valid Second to proceed");
}
//Checking if start time is equal to finish time
if (startTime == finishTime)
{
throw new UserFriendlyException("Please Enter Valid Second to proceed");
}
var a = utility.UploadAsync(clipPath, nameBucket, nameFile);
Console.WriteLine("Upload 2 completed");
}
catch (AmazonS3Exception e)
{
string err = e.Message;
throw e;
}
catch (InternalBufferOverflowException a)
{
string me = a.Message;
throw a;
}
catch (HttpRequestException c)
{
string error = c.Message;
throw c;
}
catch (DriveNotFoundException e)
{
string mes = e.Message;
throw e;
}
catch(NullReferenceException e)
{
throw new UserFriendlyException (500, "Please Select a file to proceed",e.Message);
}
}
}
}