private async Task <IDictionary <string, object> > GetMultipartForm(MultipartReader reader)
{
var section = await reader.ReadNextSectionAsync();
var collection = new Dictionary <string, object>();
if (section != null)
{
var name = GetName("name=", section.ContentDisposition);
var fileName = GetName("filename=", section.ContentDisposition);
var buffer = new MemoryStream();
await section.Body.CopyToAsync(buffer);
if (string.IsNullOrEmpty(fileName))
{
var fields = new Dictionary <string, StringValues>();
StreamReader streamReader = new StreamReader(buffer);
fields.Add(name, new StringValues(UTF8Encoding.Default.GetString(buffer.GetBuffer(), 0, (int)buffer.Length)));
collection.Add(name, fields);
}
else
{
var fileCollection = new HttpFormFileCollection();
StreamReader streamReader = new StreamReader(buffer);
fileCollection.Add(new HttpFormFile(buffer.Length, name, fileName, buffer.GetBuffer()));
collection.Add(name, fileCollection);
}
var formCollection = await GetMultipartForm(reader);
foreach (var item in formCollection)
{
if (!collection.ContainsKey(item.Key))
{
collection.Add(item.Key, item.Value);
}
}
}
return(collection);
}
private async Task <HttpFormCollection> GetFormCollection(HttpRequest request)
{
var boundary = GetName("boundary=", request.ContentType);
var reader = new MultipartReader(boundary, request.Body);
var collection = await GetMultipartForm(reader);
var fileCollection = new HttpFormFileCollection();
var fields = new Dictionary <string, StringValues>();
foreach (var item in collection)
{
if (item.Value is HttpFormFileCollection)
{
var itemCollection = item.Value as HttpFormFileCollection;
fileCollection.AddRange(itemCollection);
}
else
{
var itemCollection = item.Value as Dictionary <string, StringValues>;
fields = fields.Concat(itemCollection).ToDictionary(k => k.Key, v => v.Value);
}
}
return(new HttpFormCollection(fields, fileCollection));
}
private async Task <IDictionary <string, (StringValues?Fields, HttpFormFileCollection HttpFormFileCollection)> > GetMultipartForm(MultipartReader reader)
{
var section = await reader.ReadNextSectionAsync();
var collection = new Dictionary <string, (StringValues?Fields, HttpFormFileCollection HttpFormFileCollection)>();
if (section != null)
{
var name = GetName("name=", section.ContentDisposition);
var fileName = GetName("filename=", section.ContentDisposition);
var buffer = new MemoryStream();
await section.Body.CopyToAsync(buffer);
if (string.IsNullOrEmpty(fileName))
{
var fields = new Dictionary <string, StringValues>();
StreamReader streamReader = new StreamReader(buffer);
fields.Add(name, new StringValues(Encoding.Default.GetString(buffer.GetBuffer(), 0, (int)buffer.Length)));
collection.Add(name, (fields[name], null));
}
else
{
var fileCollection = new HttpFormFileCollection();
StreamReader streamReader = new StreamReader(buffer);
fileCollection.Add(new HttpFormFile(buffer.Length, name, fileName, buffer.GetBuffer()));
collection.Add(name, (null, fileCollection));
}
var formCollection = await GetMultipartForm(reader);
foreach (var item in formCollection)
{
if (!collection.ContainsKey(item.Key))
{
collection.Add(item.Key, item.Value);
}
else
{
var(fields, httpFormFileCollection) = collection[item.Key];
if (item.Value.Fields.HasValue && !fields.HasValue)
{
fields = item.Value.Fields.Value;
}
if (httpFormFileCollection == null)
{
httpFormFileCollection = item.Value.HttpFormFileCollection;
}
else
{
var formFiles =
item.Value.HttpFormFileCollection.Where(v =>
!httpFormFileCollection.Exists(p => p.FileName == v.FileName));
httpFormFileCollection.AddRange(formFiles);
}
collection[item.Key] = (fields, httpFormFileCollection);
}
}
}
return(collection);
}
