C#•6mo ago

Using IFormFile in Web API project results in network failure.

Hello everyone reading this thread, As the title suggests, I am trying to upload an image using the IFormFile interface in a property. When I upload the image, the system 'crashes' and I get a network failure with the following message:

Undocumented
Failed to fetch.
Possible Reasons:

CORS
Network Failure
URL scheme must be "http" or "https" for CORS request.

Undocumented
Failed to fetch.
Possible Reasons:

CORS
Network Failure
URL scheme must be "http" or "https" for CORS request.

This is the only code I have added to a default ASP .NET Web API project: Controller:

c#
[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{ 
    private readonly ILogger<WeatherForecastController> _logger;

    public WeatherForecastController(ILogger<WeatherForecastController> logger)
    {
        _logger = logger;
    }

    [HttpPost("simplepost")]
    [Consumes("multipart/form-data")]
    public async Task<IActionResult> Create(IFormFile file)
    {
        Debug.WriteLine(file.FileName);

        return Ok(file.FileName);
    }

    [HttpPost("uploadfile")]
    [Consumes("multipart/form-data")]
    public async Task<IActionResult> UploadFile([FromForm] DtoImage model)
    {
        try
        {
            _logger.LogInformation("UploadFile called.");

            if (model.File == null || model.File.Length == 0)
            {
                _logger.LogWarning("No file uploaded.");
                return BadRequest("No file uploaded.");
            }

            if (string.IsNullOrEmpty(model.Name))
       {
                _logger.LogWarning("No name provided.");
                return BadRequest("No name provided.");
            }

            var uploadsDirectory = Path.Combine(Directory.GetCurrentDirectory(), "uploads");
            _logger.LogInformation("Uploads directory: {UploadsDirectory}", uploadsDirectory);
            return Ok();
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Internal server error.");
            return StatusCode(500, $"Internal server error: {ex.Message}");
        }}}

c#
[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{ 
    private readonly ILogger<WeatherForecastController> _logger;

    public WeatherForecastController(ILogger<WeatherForecastController> logger)
    {
        _logger = logger;
    }

    [HttpPost("simplepost")]
    [Consumes("multipart/form-data")]
    public async Task<IActionResult> Create(IFormFile file)
    {
        Debug.WriteLine(file.FileName);

        return Ok(file.FileName);
    }

    [HttpPost("uploadfile")]
    [Consumes("multipart/form-data")]
    public async Task<IActionResult> UploadFile([FromForm] DtoImage model)
    {
        try
        {
            _logger.LogInformation("UploadFile called.");

            if (model.File == null || model.File.Length == 0)
            {
                _logger.LogWarning("No file uploaded.");
                return BadRequest("No file uploaded.");
            }

            if (string.IsNullOrEmpty(model.Name))
       {
                _logger.LogWarning("No name provided.");
                return BadRequest("No name provided.");
            }

            var uploadsDirectory = Path.Combine(Directory.GetCurrentDirectory(), "uploads");
            _logger.LogInformation("Uploads directory: {UploadsDirectory}", uploadsDirectory);
            return Ok();
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Internal server error.");
            return StatusCode(500, $"Internal server error: {ex.Message}");
        }}}

1 Reply

electronic heartbreak.OP•6mo ago

c#
    public class DtoImage
    {
        public string Name { get; set; }
        public IFormFile File { get; set; }
    }

c#
    public class DtoImage
    {
        public string Name { get; set; }
        public IFormFile File { get; set; }
    }

D:\ImageUpload\bin\Debug\net8.0\ImageUpload.exe (process 16644) exited with code -1. Program.cs (to enable double post in single controller):

c#
builder.Services.AddSwaggerGen(options =>
{
    options.ResolveConflictingActions(apiDescriptions => apiDescriptions.First());
});

c#
builder.Services.AddSwaggerGen(options =>
{
    options.ResolveConflictingActions(apiDescriptions => apiDescriptions.First());
});

Project:

c#
<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>net8.0</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
  </ItemGroup>

</Project>

c#
<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>net8.0</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
  </ItemGroup>

</Project>

Anyone that can help me look into this issue?

Gaming

Programming

Using IFormFile in Web API project results in network failure.