public async Task Invoke()

in Source/FranceConnect.DataProvider/Middleware/DataProviderMiddleware.cs [42:92]
46 lines of code
7 McCabe index (conditional complexity)

        public async Task Invoke(HttpContext context)
        {
            if (!context.Request.Path.Value.StartsWith("/api"))
            {
                await _next(context);
                return;
            }

            string authorization = context.Request.Headers["Authorization"];
            string token = string.Empty;

            if (string.IsNullOrEmpty(authorization))
            {
                await InvalidAuthorizationHeader(context);
                return;
            }

            if (authorization.StartsWith("Bearer ", StringComparison.OrdinalIgnoreCase))
            {
                token = authorization.Substring("Bearer ".Length).Trim();
            }

            if (string.IsNullOrEmpty(token))
            {
                await AccessTokenNotFound(context);
                return;
            }

            var client = new HttpClient();
            var httpContent = new
            {
                token = token
            };
            var response = await client.PostAsync(Options.ChecktokenEndpoint, new StringContent(JsonSerializer.Serialize(httpContent), Encoding.UTF8, "application/json"));
            if (response.IsSuccessStatusCode)
            {
                var json = response.Content.ReadAsStringAsync().Result;
                var checktokenResponse = JsonSerializer.Deserialize<ChecktokenResponse>(json, new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
                context.Items["scope"] = checktokenResponse.Scope;
                context.Items["email"] = checktokenResponse.Identity.Email;
            }
            else
            {
                await SendFranceConnectError(context, response.StatusCode, response.Content.ReadAsStringAsync().Result);
                return;
            }
            if (!context.Response.HasStarted)
            {
                await _next(context);
            }
        }