/// <inheritdoc/>
public override async Task <object> ReadAsync(BodyParserContext context)
{
var operation = context.Instance;
var properties = context.OperationContext.Descriptor.Properties;
var form = await context.HttpContext.Request.ReadFormAsync();
foreach (var item in form)
{
WriteStringValues(operation, properties, item.Key, item.Value, exception => throw _invalidForm.Create(exception.Message));
}
if (form.Files.Any())
{
var props = properties.Where(x => x.PropertyType.IsAssignableFrom(typeof(IFormFile))).ToList();
foreach (var file in form.Files)
{
var propertyToWrite = props.SingleOrDefault(x => string.Equals(x.Name, file.Name, StringComparison.OrdinalIgnoreCase));
if (propertyToWrite == null)
{
continue;
}
propertyToWrite.SetValue(operation, file);
}
}
// We have populated the object given to us, return as-is.
return(operation);
}
/// <inheritdoc />
protected sealed override async Task <object> ReadRequestBodyAsync(
BodyParserContext context,
Encoding encoding)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (encoding == null)
{
throw new ArgumentNullException(nameof(encoding));
}
var httpContext = context.HttpContext;
var(inputStream, usesTranscodingStream) = this.GetInputStream(httpContext, encoding);
try
{
// This is copied from JsonConvert.PopulateObject to avoid creating a new JsonSerializer on each
// execution.
using var stringReader = new StreamReader(inputStream);
using var jsonReader = new JsonTextReader(stringReader)
{
CloseInput = false
};
try
{
this._bodyJsonSerializer.Populate(jsonReader, context.Instance);
}
catch (JsonException e)
{
throw _invalidJson.Create(e.Message);
}
if (await jsonReader.ReadAsync() && jsonReader.TokenType != JsonToken.Comment)
{
throw _invalidJson.Create("Additional text found in JSON");
}
}
finally
{
if (usesTranscodingStream)
{
// TODO: When we target .net 5.0 can make use of built-in transcoding Stream with async Dispose
// await inputStream.DisposeAsync();
}
}
// We have populated the object given to us, return as-is.
return(context.Instance);
}
/// <inheritdoc />
protected sealed override async Task <object> ReadRequestBodyAsync(
BodyParserContext context,
Encoding encoding)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (encoding == null)
{
throw new ArgumentNullException(nameof(encoding));
}
var httpContext = context.HttpContext;
var(inputStream, usesTranscodingStream) = this.GetInputStream(httpContext, encoding);
try
{
return(await JsonSerializer.DeserializeAsync(inputStream, context.BodyType, this._serializerOptions));
}
catch (JsonException jsonException)
{
throw _invalidJson.Create(jsonException.Message);
}
catch (Exception exception) when(exception is FormatException || exception is OverflowException)
{
// The code in System.Text.Json never throws these exceptions. However a custom converter could produce these errors for instance when
// parsing a value. These error messages are considered safe to report to users
throw _invalidJson.Create(exception.Message);
}
finally
{
if (usesTranscodingStream)
{
// TODO: When we target .net 5.0 can make use of built-in transcoding Stream with async Dispose
// await inputStream.DisposeAsync();
}
}
}
/// <inheritdoc />
public virtual bool CanRead(BodyParserContext context)
{
if (this.SupportedMediaTypes.Count == 0)
{
throw new InvalidOperationException($"{this.GetType().FullName} does not specify any support media types. Ensure that {nameof(this.SupportedMediaTypes)} has been populated with at least one value");
}
if (!this.CanReadType(context.BodyType))
{
return(false);
}
var contentType = context.HttpContext.Request.ContentType;
if (string.IsNullOrEmpty(contentType))
{
return(false);
}
// Confirm the request's content type is more specific than a media type this formatter supports e.g. OK if
// client sent "text/plain" data and this formatter supports "text/*".
return(this.IsSubsetOfAnySupportedContentType(contentType));
}
/// <inheritdoc/> public abstract Task <object> ReadAsync(BodyParserContext context);
