Program.cs

using System.Diagnostics;
using System.Net;
using System.Text;

var sw = Stopwatch.StartNew();
string? previousRequest = null;
string? previousResponse = null;
while (true)
{
    using var httpClient = new HttpClient();
    using var request = new HttpRequestMessage(HttpMethod.Get, "https://api.nuget.org/v3/flatcontainer/microsoft.extensions.logging/5.0.0/microsoft.extensions.logging.5.0.0.nupkg");
    request.Headers.TryAddWithoutValidation("x-ms-version", "2013-08-15");
    request.Headers.TryAddWithoutValidation("If-Match", "0x8D8850AF6EC22DC");
    request.Headers.TryAddWithoutValidation("Range", "bytes=107866-107887");

    using var response = await httpClient.SendAsync(request);
    Console.WriteLine($"[{sw.Elapsed}] {(int)response.StatusCode} {response.ReasonPhrase}");

    if (response.StatusCode != HttpStatusCode.PartialContent)
    {
        Console.WriteLine();
        Console.WriteLine("=== Previous session ===");
        Console.WriteLine();
        Console.WriteLine();
        Console.WriteLine(previousRequest);
        Console.WriteLine();
        Console.WriteLine();
        Console.WriteLine(previousResponse);
        Console.WriteLine();
        Console.WriteLine();

        Console.WriteLine("=== Current ===");
        Console.WriteLine();
        Console.WriteLine();
        Console.WriteLine(await GetRequestDebugStringAsync(request));
        Console.WriteLine();
        Console.WriteLine();
        Console.WriteLine(await GetResponseDebugStringAsync(response));
        Console.WriteLine();
        Console.WriteLine();

        return;
    }

    previousRequest = await GetRequestDebugStringAsync(request);
    previousResponse = await GetResponseDebugStringAsync(response);
}

static async Task<string> GetRequestDebugStringAsync(HttpRequestMessage request)
{
    var builder = new StringBuilder();

    builder.AppendFormat("{0} {1} HTTP/{2}\r\n", request.Method, request.RequestUri.AbsoluteUri, request.Version);

    await AppendHeadersAndBody(builder, request.Headers, request.Content);

    return builder.ToString();
}

static async Task<string> GetResponseDebugStringAsync(HttpResponseMessage response)
{
    var builder = new StringBuilder();

    builder.AppendFormat("HTTP/{0} {1} {2}\r\n", response.Version, (int)response.StatusCode, response.ReasonPhrase);

    await AppendHeadersAndBody(builder, response.Headers, response.Content);

    return builder.ToString();
}

static async Task AppendHeadersAndBody(
    StringBuilder builder,
    IEnumerable<KeyValuePair<string, IEnumerable<string>>> headers,
    HttpContent content)
{
    if (content != null)
    {
        headers = headers.Concat(content.Headers);
    }

    // Write the headers.
    foreach (var header in headers)
    {
        foreach (var value in header.Value)
        {
            builder.AppendFormat("{0}: {1}\r\n", header.Key, value);
        }
    }

    builder.Append("\r\n");

    // Write the request or response body.
    if (content != null)
    {
        using (var stream = await content.ReadAsStreamAsync())
        {
            var buffer = new byte[1024 * 32 + 1];
            var totalRead = 0;
            int read;
            do
            {
                read = await stream.ReadAsync(buffer, totalRead, buffer.Length - totalRead);
                totalRead += read;
            }
            while (totalRead < buffer.Length && read > 0);

            var hasMore = totalRead == buffer.Length;
            var dataLength = Math.Min(totalRead, buffer.Length - 1);

            try
            {
                using (var memoryStream = new MemoryStream(buffer, 0, dataLength))
                using (var reader = new StreamReader(memoryStream))
                {
                    // Write the response body as a string.
                    builder.Append(reader.ReadToEnd());
                }
            }
            catch (Exception)
            {
                // Write the response body as base64 bytes.
                builder.Append("<base64>\r\n");
                builder.Append(Convert.ToBase64String(buffer, 0, dataLength));
            }

            if (hasMore)
            {
                builder.Append("\r\n<truncated>");
            }
        }
    }
}

sessions.txt

=== Previous session ===


GET https://api.nuget.org/v3/flatcontainer/microsoft.extensions.logging/5.0.0/microsoft.extensions.logging.5.0.0.nupkg HTTP/1.1
x-ms-version: 2013-08-15
If-Match: 0x8D8850AF6EC22DC
Range: bytes=107866-107887




HTTP/1.1 206 Partial Content
Accept-Ranges: bytes
Access-Control-Allow-Origin: *
Access-Control-Expose-Headers: x-ms-request-id,Server,x-ms-version,x-ms-meta-da7b2905_0f3c_4262_921c_b1593d1336f1_ESRP_RequestId,x-ms-meta-SHA512,Content-Type,Cache-Control,Last-Modified,ETag,x-ms-lease-status,x-ms-lease-state,x-ms-blob-type,Accept-Ranges,Content-Length,Date,Transfer-Encoding
Cache-Control: max-age=86400
Date: Wed, 29 Mar 2023 03:46:49 GMT
ETag: "0x8D8850AF6EC22DC"
Server: Windows-Azure-Blob/1.0
Server: Microsoft-HTTPAPI/2.0
Strict-Transport-Security: max-age=31536000; includeSubDomains
X-CDN-Rewrite: Root path in dist
X-Content-Type-Options: nosniff
x-ms-blob-type: BlockBlob
x-ms-lease-state: available
x-ms-lease-status: unlocked
x-ms-meta-da7b2905_0f3c_4262_921c_b1593d1336f1_ESRP_RequestId: 47b474a7-936e-41c5-a44d-cdee53336147
x-ms-meta-SHA512: GGUVP+sruHXiWkeVXFPzGVgmX8GbiQyq3B1UMJzHelDyyLjVsWPB6IXone4+mJQCMvR9rsnpsSxdRYjb5+WyRQ==
x-ms-request-id: 2c8cf38f-601e-0004-18f1-6130f0000000
x-ms-version: 2013-08-15
Content-Range: bytes 107866-107887/107888
Content-Type: application/octet-stream
Expires: Thu, 30 Mar 2023 03:46:50 GMT
Last-Modified: Mon, 09 Nov 2020 23:55:41 GMT
Content-Length: 22

PK♣♠►►?♦g?☺


=== Current ===


GET https://api.nuget.org/v3/flatcontainer/microsoft.extensions.logging/5.0.0/microsoft.extensions.logging.5.0.0.nupkg HTTP/1.1
x-ms-version: 2013-08-15
If-Match: 0x8D8850AF6EC22DC
Range: bytes=107866-107887




HTTP/1.1 400 Bad Request
Cache-Control: public, max-age=86400
Accept-Ranges: bytes
ETag: "0x8D8850AF6EC22DC"
X-Cache: TCP_REMOTE_HIT
x-ms-request-id: a88d25ee-b01e-0038-63eb-611937000000
x-ms-version: 2013-08-15
x-ms-meta-da7b2905_0f3c_4262_921c_b1593d1336f1_ESRP_RequestId: 47b474a7-936e-41c5-a44d-cdee53336147
x-ms-meta-SHA512: GGUVP+sruHXiWkeVXFPzGVgmX8GbiQyq3B1UMJzHelDyyLjVsWPB6IXone4+mJQCMvR9rsnpsSxdRYjb5+WyRQ==
x-ms-lease-status: unlocked
x-ms-lease-state: available
x-ms-blob-type: BlockBlob
Access-Control-Expose-Headers: x-ms-request-id,Server,x-ms-version,x-ms-meta-da7b2905_0f3c_4262_921c_b1593d1336f1_ESRP_RequestId,x-ms-meta-SHA512,Content-Type,Cache-Control,Last-Modified,ETag,Content-MD5,x-ms-lease-status,x-ms-lease-state,x-ms-blob-type,Accept-Ranges,Content-Length,Date,Transfer-Encoding
Access-Control-Allow-Origin: *
X-Azure-Ref-OriginShield: 0qrQjZAAAAAD3M/brsAjGRbzGs0mQqQ67RE0yQUExMDkxMjA3MDIxADgwZDFiZGUzLTJjYWQtNDJkZi1iYTQyLTRjYzUwMjA0ZTJmYg==
Strict-Transport-Security: max-age=31536000; includeSubDomains
X-Content-Type-Options: nosniff
X-Azure-Ref: 0qrQjZAAAAACVAzreOR40SLJdNlg7T9IQQ0hHRURHRTE1MDgAODBkMWJkZTMtMmNhZC00MmRmLWJhNDItNGNjNTAyMDRlMmZi
Date: Wed, 29 Mar 2023 03:46:50 GMT
Content-Length: 23
Content-Type: application/octet-stream
Content-MD5: rXQv22f9ySXp5PWQ6Xuhfw==
Last-Modified: Mon, 09 Nov 2020 23:55:41 GMT

ERROR 400: Bad Request.