52 lines
1.7 KiB
C#
52 lines
1.7 KiB
C#
using Microsoft.AspNetCore.Mvc.ModelBinding;
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using Microsoft.AspNetCore.Mvc.ModelBinding.Binders;
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using Newtonsoft.Json;
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namespace YLWebAPI.ApiModule
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{
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/// <summary>
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/// application/json模型绑定(支持空body，避免报400 error:A non-empty request body is required.)
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/// </summary>
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internal class JsonBodyBinderProvider : IModelBinderProvider
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{
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public IModelBinder GetBinder(ModelBinderProviderContext context)
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{
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if (context == null)
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{
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throw new ArgumentNullException(nameof(context));
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}
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if (!context.Metadata.ModelType.IsValueType)
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{
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return new BinderTypeModelBinder(typeof(EmptyBodyModelBinder));
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}
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return null;
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}
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class EmptyBodyModelBinder : IModelBinder
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{
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public async Task BindModelAsync(ModelBindingContext bindingContext)
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{
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if (bindingContext.HttpContext.Request.ContentType?.Contains("application/json") != true)
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{
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return;
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}
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var stream = bindingContext.HttpContext.Request.Body;
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using var reader = new StreamReader(stream);
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var jsonbody = await reader.ReadToEndAsync();
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if (jsonbody.Length > 0)
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{
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var obj = JsonConvert.DeserializeObject(jsonbody, bindingContext.ModelType);
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bindingContext.Result = ModelBindingResult.Success(obj);
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}
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else
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{
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bindingContext.Result = ModelBindingResult.Success(null);
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}
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}
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}
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}
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}
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