如何在web api中压缩HttpClient发布和接收数据
本文关键字:数据 HttpClient 压缩 web api | 更新日期: 2023-09-27 18:22:08
我有以下web api客户端,它使用json和gzip向服务器发送数据:
public void Remote_Push(BlockList Blocks)
{
// Pushes pending records to the remote server
using (var Client = new HttpClient())
{
Client.BaseAddress = new Uri(Context.ServerUrl);
Client.DefaultRequestHeaders.Accept.Clear();
Client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var Content = JsonCompress(Blocks);
var T1 = Client.PostAsync("SyncPush/", Content); T1.Wait();
T1.Result.EnsureSuccess();
}
}
private static ByteArrayContent JsonCompress(object Data)
{
// Compress given data using gzip
var Bytes = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(Data));
using (var Stream = new MemoryStream())
{
using (var Zipper = new GZipStream(Stream, CompressionMode.Compress, true)) Zipper.Write(Bytes, 0, Bytes.Length);
var Content = new ByteArrayContent(Stream.ToArray());
Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
Content.Headers.ContentEncoding.Add("gzip");
return Content;
}
}
在服务器上,我在web api控制器中创建了以下操作:
[HttpPost]
public void SyncPush([FromBody]BlockList Blocks)
{
var Context = SyncCreateContext();
var Sync = new Processor(Context);
Sync.ServerPush(Blocks);
}
以前,我在客户端上使用过PostAsJsonAsync
,它运行良好。
现在,我已经切换到ByteArrayContent
和gzip
,不再工作,服务器上的Blocks
始终是null
。我在这里错过了什么,出了什么问题,或者可能是问题所在?
下面是一个示例控制台应用程序,用于执行您尝试执行的操作。
/*using System;
using System.IO;
using System.IO.Compression;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using Newtonsoft.Json;
using WebApi.Models;*/
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Press any key to POST");
Console.ReadLine();
RemotePush(new BlockList());
Console.ReadLine();
}
public static async void RemotePush(BlockList blocks)
{
try
{
using (var client = new HttpClient())
{
try
{
Console.WriteLine("Please wait.");
client.BaseAddress = new Uri("http://localhost:52521/Home/");
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var content = JsonCompress(blocks);
var response = await client.PostAsync("SyncPush/", content);
using (var stream = await response.Content.ReadAsStreamAsync())
{
using (var streamReader = new StreamReader(stream))
{
Console.WriteLine(streamReader.ReadToEnd());
}
}
Console.WriteLine("Done.");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
private static MultipartFormDataContent JsonCompress(object data)
{
var bytes = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(data));
var stream = new MemoryStream();
using (var zipper = new GZipStream(stream, CompressionMode.Compress, true))
{
zipper.Write(bytes, 0, bytes.Length);
}
MultipartFormDataContent multipartContent = new MultipartFormDataContent();
multipartContent.Add(new StreamContent(stream), "gzipContent");
return multipartContent;
}
}
我的控制器是这样的。
[System.Web.Mvc.HttpPost]
public JsonResult SyncPush(BlockList content)
{
try
{
if (content != null)
{
return Json("success", JsonRequestBehavior.AllowGet);
}
return Json("failed due to null", JsonRequestBehavior.AllowGet);
}
catch (Exception ex)
{
return Json("failed " + ex.Message, JsonRequestBehavior.AllowGet);
}
}
仅供参考,因为.NET核心不在其中,而且这个问题仍然与工作中的.NET核心代码有关。我使用brotli,因为这是今天被广泛接受的标准。
using System.Text.Json.Serialization;
using System.Text.Json;
using System.Net.Http.Headers;
using System.IO.Compression;
public static class CompressedJsonHelper
{
private static readonly Lazy<JsonSerializerOptions>
Options = new(() =>
{
var opt = new JsonSerializerOptions { DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull, PropertyNamingPolicy = JsonNamingPolicy.CamelCase };
//opt.Converters.Add(new JsonStringEnumConverter(JsonNamingPolicy.CamelCase));
return opt;
});
public static HttpContent ToJson(this object data, bool noCompress = false)
{
if (noCompress)
{
ByteArrayContent byteContent = new (ToBytes(data));
byteContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
return byteContent;
}
MemoryStream memoryStream = new ();
BrotliStream compress = new (memoryStream, CompressionLevel.Optimal, true);
StreamContent streamContent = new (memoryStream);
streamContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
streamContent.Headers.ContentEncoding.Add("brotli");
JsonSerializer.Serialize(compress, data, Options.Value);
compress.Flush();
memoryStream.Position = 0;
return streamContent;
}
private static byte[] ToBytes(this object data) => JsonSerializer.SerializeToUtf8Bytes(data, Options.Value);
}
httpClient代码:
using HttpRequestMessage request = new(HttpMethod.Post, $"{yourbaseurl}/{path}")
{
Content = json.ToJson()
};
await _httpClient.SendAsync(request, ...) etc