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Adds ToByteArrayAsync with cancellation support #11

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Adds ToByteArrayAsync with cancellation support #11

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52 changes: 50 additions & 2 deletions QuickChart/QuickChart.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,8 @@
using System.Text;
using System.Text.Json;
using System.IO;
using System.Threading;
using System.Threading.Tasks;

namespace QuickChart
{
Expand Down Expand Up @@ -51,7 +53,7 @@ public Chart(string scheme = null, string host = null, int? port = null)
}
else
{
if(scheme == "http")
if (scheme == "http")
{
Port = 80;
}
Expand Down Expand Up @@ -178,6 +180,52 @@ public byte[] ToByteArray()
return response.Content.ReadAsByteArrayAsync().Result;
}

public async Task<byte[]> ToByteArrayAsync(CancellationToken cancellationToken = default)
{
cancellationToken.ThrowIfCancellationRequested();

if (Config == null)
{
throw new NullReferenceException("You must set Config on the QuickChart object before generating a URL");
}

var options = new JsonSerializerOptions()
{
IgnoreNullValues = true,
};

var json = JsonSerializer.Serialize(new
{
width = Width,
height = Height,
backgroundColor = BackgroundColor,
devicePixelRatio = DevicePixelRatio,
format = Format,
chart = Config,
}, options);

var url = $"{Scheme}://{Host}:{Port}/chart";

using (var content = new StringContent(json, Encoding.UTF8, "application/json"))
{
var response = await Client.PostAsync(url, content, cancellationToken).ConfigureAwait(false);

if (!response.IsSuccessStatusCode)
{
throw new ApiException("Unsuccessful response from API", response);
}

using (response)
{
cancellationToken.ThrowIfCancellationRequested();

return await response.Content
.ReadAsByteArrayAsync()
.ConfigureAwait(false);
}
}
}

public void ToFile(string filePath)
{
File.WriteAllBytes(filePath, this.ToByteArray());
Expand All @@ -186,7 +234,7 @@ public void ToFile(string filePath)

public class ApiException : Exception
{
public ApiException(string message, HttpResponseMessage response) : base(message)
public ApiException(string message, HttpResponseMessage response) : base(message)
=> this.Response = response;

public HttpResponseMessage Response { get; private set; }
Expand Down