是否需要处理IFormFile.OpenReadStream()？

Question

是否应该在using块中调用IFormFile.OpenReadStream()，以便正确地处理它？或者它会在http请求完成处理后由IFormFile处理？

https://docs.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.http.iformfile.openreadstream?view=aspnetcore-5.0#Microsoft_AspNetCore_Http_IFormFile_OpenReadStream

Answer 1

FormFile的缺省实现在每次调用OpenReadStream()时都会创建一个新的ReferenceReadStream：https://github.com/dotnet/aspnetcore/blob/033b1fb1cf681ea95d3954c08e4391c93cd72683/src/Http/Http/src/FormFile.cs#L81

ReferenceReadStream不包含任何非托管资源。对它调用Dispose本质上是一种禁止操作。https://github.com/dotnet/aspnetcore/blob/033b1fb1cf681ea95d3954c08e4391c93cd72683/src/Http/Http/src/Internal/ReferenceReadStream.cs#L14

考虑到这一点，IFormFile.OpenReadStream()不需要被处理。但是处理掉它也不会伤害到任何东西。