public async Task Invoke(HttpContext httpContext)
{
try
{
if (IsGrpcGatewayRequest(httpContext))
{
if (!IsAllowedMethod(httpContext))
{
httpContext.Response.Clear();
httpContext.Response.StatusCode = (int)HttpStatusCode.MethodNotAllowed;
return;
}
string body;
using (var sr = new StreamReader(httpContext.Request.Body, Encoding.UTF8))
body = sr.ReadToEnd();
if (string.IsNullOrWhiteSpace(body))
{
body = "[]";
}
var lastIndexOf = httpContext.Request.Path.Value.LastIndexOf('/') + 1;
var key = new StringSegment(httpContext.Request.Path.Value, lastIndexOf, httpContext.Request.Path.Value.Length - lastIndexOf);
var metadata = new Metadata();
foreach (var header in httpContext.Request.Headers)
{
metadata.Add(header.Key, header.Value);
}
var client = new CacheServiceClient(_channel);
object response;
if (HttpMethods.IsGet(httpContext.Request.Method))
{
response = await client.GetAsync(new GetRequest { Key = key.ToString() }, new CallOptions().WithHeaders(metadata));
}
else
{
response = await client.SetAsync(JsonConvert.DeserializeObject <SetRequest>(body), new CallOptions().WithHeaders(metadata));
}
var responseBody = JsonConvert.SerializeObject(response, new[] { new Newtonsoft.Json.Converters.StringEnumConverter() });
httpContext.Response.ContentType = "application/json";
await httpContext.Response.WriteAsync(responseBody);
return;
}
else
{
await _next(httpContext);
}
}
catch (Exception ex)
{
httpContext.Response.StatusCode = 500;
await httpContext.Response.WriteAsync(ex.ToString());
}
}
private static async Task GeneratedClientExample(CallInvoker invoker)
{
var client = new CacheServiceClient(invoker);
try
{
await client.SetAsync(new SetRequest
{
Key = "ClientDemo",
Value = ByteString.CopyFrom("ClientDemo", Encoding.UTF8)
}, options : new CallOptions().WithDeadline(DateTime.UtcNow.AddSeconds(2)));
var response = await client.GetAsync(new GetRequest
{
Key = "ClientDemo",
}, options : new CallOptions().WithDeadline(DateTime.UtcNow.AddSeconds(2)));
Logger.Info("Get by key pattern 'Client'");
using (var stream = client.GetByKeyPattern(new GetByKeyPatternRequest
{
Pattern = "Client",
}, options: new CallOptions().WithDeadline(DateTime.UtcNow.AddSeconds(5))))
{
while (await stream.ResponseStream.MoveNext())
{
var current = stream.ResponseStream.Current;
Logger.Info($"Got key '{current.Key}' with value '{current.Value.ToStringUtf8()}'");
}
};
}
catch (RpcException ex)
{
Logger.Error(ex, "Error setting key: 'ClientDemo'");
}
}