Added simple C# example (#25)
diff --git a/http/get_simple/csharp/.gitignore b/http/get_simple/csharp/.gitignore
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diff --git a/http/get_simple/csharp/client/ArrowHttpClient.cs b/http/get_simple/csharp/client/ArrowHttpClient.cs
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+++ b/http/get_simple/csharp/client/ArrowHttpClient.cs
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Apache.Arrow;
+using Apache.Arrow.Ipc;
+
+namespace ArrowHttpClient
+{
+ public class Program
+ {
+ public static async Task Main(string[] args)
+ {
+ string serverUri = "http://127.0.0.1:8008/";
+
+ DateTime startTime = DateTime.UtcNow;
+
+ HttpClient httpClient = new HttpClient
+ {
+ BaseAddress = new Uri(serverUri),
+ };
+
+ using (var stream = await httpClient.GetStreamAsync(serverUri))
+ using (var reader = new ArrowStreamReader(stream))
+ {
+ Console.WriteLine("Connected");
+
+ Schema schema = reader.Schema;
+ List<RecordBatch> batches = new List<RecordBatch>();
+
+ int numRows = 0;
+ RecordBatch batch;
+ while ((batch = await reader.ReadNextRecordBatchAsync()) != null)
+ {
+ numRows += batch.Length;
+ batches.Add(batch);
+ }
+
+ DateTime endTime = DateTime.UtcNow;
+
+ Console.WriteLine($"{numRows} records received");
+ Console.WriteLine($"{batches.Count} record batches received");
+ Console.WriteLine($"{(endTime - startTime).TotalSeconds} seconds elapsed");
+ }
+ }
+ }
+}
diff --git a/http/get_simple/csharp/client/Client.csproj b/http/get_simple/csharp/client/Client.csproj
new file mode 100644
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+++ b/http/get_simple/csharp/client/Client.csproj
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+<Project Sdk="Microsoft.NET.Sdk">
+
+ <PropertyGroup>
+ <OutputType>Exe</OutputType>
+ <TargetFramework>net8.0</TargetFramework>
+ </PropertyGroup>
+
+ <ItemGroup>
+ <PackageReference Include="Apache.Arrow" Version="15.0.1" />
+ </ItemGroup>
+
+</Project>
diff --git a/http/get_simple/csharp/client/README.md b/http/get_simple/csharp/client/README.md
new file mode 100644
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--- /dev/null
+++ b/http/get_simple/csharp/client/README.md
@@ -0,0 +1,32 @@
+<!---
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements. See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership. The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing,
+ software distributed under the License is distributed on an
+ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ KIND, either express or implied. See the License for the
+ specific language governing permissions and limitations
+ under the License.
+-->
+
+# HTTP GET Arrow Data: Simple C# Client Example
+
+This directory contains a minimal example of an HTTP client implemented in C#. The client:
+
+1. Sends an HTTP GET request to a server.
+2. Receives an HTTP 200 response from the server, with the response body containing an Arrow IPC stream of record batches.
+3. Adds the record batches to a list as they are received.
+
+To run this example, first start one of the server examples in the parent directory, then:
+
+```sh
+dotnet run -c Release
+```
diff --git a/http/get_simple/csharp/server/ArrowHttpServer.cs b/http/get_simple/csharp/server/ArrowHttpServer.cs
new file mode 100644
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Threading.Tasks;
+using Apache.Arrow;
+using Apache.Arrow.Ipc;
+using Apache.Arrow.Types;
+
+namespace ArrowHttpServer
+{
+ public class Program
+ {
+ static readonly Schema schema = new Schema(
+ new Field[]
+ {
+ new Field("a", Int64Type.Default, true),
+ new Field("b", Int64Type.Default, true),
+ new Field("c", Int64Type.Default, true),
+ new Field("d", Int64Type.Default, true),
+ }, null);
+
+ static List<RecordBatch> GenerateBatches(int totalRecords = 100000000, int batchSize = 4096)
+ {
+ Random random = new Random();
+ IArrowArray[] columns = new IArrowArray[schema.FieldsList.Count];
+ for (int i = 0; i < columns.Length; i++)
+ {
+ byte[] dataBytes = new byte[batchSize * sizeof(long)];
+ random.NextBytes(dataBytes);
+ ArrowBuffer data = new ArrowBuffer(dataBytes);
+ byte[] validityBytes = new byte[batchSize / 8];
+ System.Array.Fill(validityBytes, (byte)0xff);
+ ArrowBuffer validity = new ArrowBuffer(validityBytes);
+
+ columns[i] = ArrowArrayFactory.BuildArray(new ArrayData(schema.FieldsList[i].DataType, batchSize, 0, 0, new [] { validity, data }, null));
+ }
+
+ List<RecordBatch> batches = new List<RecordBatch>(totalRecords);
+ using (RecordBatch batch = new RecordBatch(schema, columns, batchSize))
+ {
+ int records = 0;
+ while (records < totalRecords)
+ {
+ RecordBatch newBatch = batch.Clone();
+ if (records + batchSize > totalRecords)
+ {
+ int newLength = totalRecords - records;
+ newBatch = new RecordBatch(schema, newBatch.Arrays.Select(a => ArrowArrayFactory.Slice(a, 0, newLength)), newLength);
+ }
+
+ batches.Add(batch);
+ records += batchSize;
+ }
+ }
+
+ return batches;
+ }
+
+ public static async Task Main(string[] args)
+ {
+ string serverUri = "http://127.0.0.1:8008/";
+
+ HttpListener listener = new HttpListener();
+ listener.Prefixes.Add(serverUri);
+ listener.Start();
+
+ Console.Write("Generating data... ");
+ var batches = GenerateBatches();
+ Console.WriteLine("done.");
+
+ while (true)
+ {
+ Console.Write("Waiting... ");
+ var context = await listener.GetContextAsync();
+ Console.WriteLine("client connected");
+ DateTime startTime = DateTime.UtcNow;
+
+ context.Response.SendChunked = true;
+ context.Response.StatusCode = (int)HttpStatusCode.OK;
+ context.Response.ContentType = "application/vnd.apache.arrow.stream";
+
+ int numRows = 0;
+ using (context.Response.OutputStream)
+ using (var writer = new ArrowStreamWriter(context.Response.OutputStream, schema))
+ {
+ foreach (RecordBatch batch in batches)
+ {
+ await writer.WriteRecordBatchAsync(batch);
+ numRows += batch.Length;
+ }
+ }
+ DateTime endTime = DateTime.UtcNow;
+
+ Console.WriteLine("Done");
+ Console.WriteLine($"{numRows} records sent");
+ Console.WriteLine($"{batches.Count} record batches sent");
+ Console.WriteLine($"{(endTime - startTime).TotalSeconds} seconds elapsed");
+ }
+ }
+ }
+}
diff --git a/http/get_simple/csharp/server/README.md b/http/get_simple/csharp/server/README.md
new file mode 100644
index 0000000..9a7f087
--- /dev/null
+++ b/http/get_simple/csharp/server/README.md
@@ -0,0 +1,32 @@
+<!---
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements. See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership. The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing,
+ software distributed under the License is distributed on an
+ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ KIND, either express or implied. See the License for the
+ specific language governing permissions and limitations
+ under the License.
+-->
+
+# HTTP GET Arrow Data: Simple C# Server Example
+
+This directory contains a minimal example of an HTTP server implemented in C#. The server:
+
+1. Creates a list of record batches and populates it with synthesized data.
+2. Listens for HTTP requests from clients.
+3. Upon receiving a request, sends an HTTP 200 response with the body containing an Arrow IPC stream of record batches.
+
+To run this example:
+
+```sh
+dotnet run -c Release
+```
diff --git a/http/get_simple/csharp/server/Server.csproj b/http/get_simple/csharp/server/Server.csproj
new file mode 100644
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--- /dev/null
+++ b/http/get_simple/csharp/server/Server.csproj
@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+ <PropertyGroup>
+ <OutputType>Exe</OutputType>
+ <TargetFramework>net8.0</TargetFramework>
+ </PropertyGroup>
+
+ <ItemGroup>
+ <PackageReference Include="Apache.Arrow" Version="15.0.1" />
+ </ItemGroup>
+
+</Project>
