Web api file upload sample

This is another huge benefit over multipart, as this small and simple HTTP request has a much better chance of being successful first time than a request with a 1gb video in it. This small web request is likely to sneak through, and reduce the change of that title and description being lost, which is so so so annoying.

With all of your meta data saved, all you have to do is fire the video at this URL:. Larger companies will be more prone to building a service to handle such files coming in, whilst smaller teams might want to keep things simple and let their API do the heavy lifting. Maintaining those connections might slow down a Rails-based API for a long time, for example, so having another service would help there. The YouTube approach is a bit complex, but a combination of 1 and 2 usually take care of the job, and stop you needing to work with multi-part uploads, which to me hardly solve the problem and make life unnecessarily complex for some developers.

I have come across a few main approaches to uploading files: Uploading a file with metadata, like an image with comments, categories, location, etc. The requests are processed individually, and the responses are put into another MIME multipart entity body, which is returned to the client. Shows how to read and write request and response entities asynchronously using streams.

The sample controller has two actions: a PUT action that reads the request entity body asynchronously and stores it in a local file, and a GET action that returns the contents of the local file. Shows how to modify ASP. The sample implements a custom IAssembliesResolver which calls the default implementation and then adds the library assembly to the default results. Shows how to create a custom media type formatter using the BufferedMediaTypeFormatter base class.

This base class is intended for formatters which primarily use synchronous read and write operations. In addition to showing the media type formatter, the sample shows how to hook it up by registering it as part of the HttpConfiguration for your application. Note that it is also possible to use the MediaTypeFormatter base class directly, for formatters which primarily use asynchronous read and write operations.

Shows how to customize the parameter binding process, which is the process that determines how information from a request is bound to action parameters. In this sample, the Home controller has four actions:.

File Upload Sample detailed description VS source. The controller reads the contents of an HTML file upload asynchronously and writes one or more body parts to a local file. The response contains information about the uploaded file or files. It also provides a mechanism for listing the blobs currently present in an Azure Blob Storage Container. This sample shows how to write the OData controller so that you can have full CRUD support with parameter binding etc.

This sample illustrates server-driven paging using OData. The controller uses Entity Framework as an object relational mapper and the client uses datajs to make OData requests in JavaScript and Knockout for refreshing the page elements. The server controls the page size by using the ResultLimit property on the [Queryable] attribute.

Modifying this value allows the server to change the page size for the client without requiring any changes to the client itself. This allows us to add extra header fields, manipulate the status code, etc.

This sample illustrates how to create an OData service consisting of three entities and three ApiControllers. The controllers provide various levels of functionality in terms of the OData functionality they expose:.

The SupplierController exposes a subset of functionality including Query, Get by Key and Create, by handling these requests:. This sample illustrates how to create multiple versions of OData service in same application and how to support versioning by route, query string and header.

Push Content Sample detailed description VS source. This sample illustrates using PushStreamContent to write a never-ending response to a client. The PushContentController writes a little bit of data to the client every second until the client disconnects. Relay Sample VS source. This sample shows how to relay an HTTP request and response from a backend service through a relay controller asynchronously and without buffering the contents on the server.

The data flow is such that all data is exchanged asynchronously both upload and download and without buffering the contents in the Relay. This allows the sample to pipe though many GBytes without running out of resources. This sample illustrates how to copy a response entity i. It does so by hooking in a HttpMessageHandler that wraps the response entity with one that both writes itself to the output as normal and to a local file.

Validation Sample VS source. This sample illustrates how you can use validation attributes on your models in ASP. It demonstrates how to mark properties as required, how to use both framework-defined and custom validation attributes to annotate your model, and how to return error responses for invalid model states.

Web Form Sample detailed description VS source. In addition to the controller we also add a default route to global.

These are samples that are only supported by the latest nightly runtime builds. Range requests is the ability in HTTP to request a part of a document based on one or more ranges.

Never use a client-supplied file name for saving a file to physical storage. Create a safe file name for the file using Path. GetRandomFileName or Path. GetTempFileName to create a full path including the file name for temporary storage. Outside of Razor, always HtmlEncode file name content from a user's request.

Many implementations must include a check that the file exists; otherwise, the file is overwritten by a file of the same name. Supply additional logic to meet your app's specifications. In the sample app, the size of the file is limited to 2 MB indicated in bytes. The limit is supplied via Configuration from the appsettings.

MultipartBodyLengthLimit sets the limit for the length of each multipart body. Form sections that exceed this limit throw an InvalidDataException when parsed.

The default is ,, MB. ConfigureServices :. In a Razor Pages app, apply the filter with a convention in Startup. For apps hosted by Kestrel, the default maximum request body size is 30,, bytes, which is approximately The default request limit maxAllowedContentLength is 30,, bytes, which is approximately Customize the limit in the web.

In the following example, the limit is set to 50 MB 52,, bytes :. Below are some common problems encountered when working with uploading files and their possible solutions. The following error indicates that the uploaded file exceeds the server's configured content length:. A connection error and a reset server connection probably indicates that the uploaded file exceeds Kestrel's maximum request body size.

For more information, see the Kestrel maximum request body size section. Kestrel client connection limits may also require adjustment. Also confirm that the upload naming in form data matches the app's naming. The examples in this topic rely upon MemoryStream to hold the uploaded file's content. The size limit of a MemoryStream is int. If the app's file upload scenario requires holding file content larger than 50 MB, use an alternative approach that doesn't rely upon a single MemoryStream for holding an uploaded file's content.

Data storage service for example, Azure Blob Storage. The following example demonstrates how to use JavaScript to stream a file to a controller action. MaxRequestBodySize in Startup. For more information, see Host ASP. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Upload files in ASP. Is this page helpful? Please rate your experience Yes No.