// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env, IStudentServiceDb service)
{
//chain of processing units that process our request (middlewares)
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
//swagger documentation
app.UseSwagger();
app.UseSwaggerUI(c =>
{
c.SwaggerEndpoint("/swagger/v1/swagger.json", "Student Api V1");
});
//logging middleware
// Since i have it at the top it will log all requests whether it is correct or not
app.UseMiddleware <LogMiddleware>();
//MiddleWare to check student authorization if students wants to see his/her grades for example ( require index )
// note you would need to include 'grades' in path and Index as a key in header
app.UseWhen(context => context.Request.Path.ToString().Contains("grades"), app => app.Use(async(context, next) =>
{
if (!context.Request.Headers.ContainsKey("Index"))
{
//if index is not found => short circuit and return 401
context.Response.StatusCode = StatusCodes.Status401Unauthorized;
await context.Response.WriteAsync("Index number is required ");
return;
}
//validate index by checking if index exists in the database
String index = context.Request.Headers["Index"].ToString();
if (!service.CheckIndex(index))
{
context.Response.StatusCode = StatusCodes.Status401Unauthorized;
await context.Response.WriteAsync("Index number does not exist in the database");
return;
}
context.Response.StatusCode = StatusCodes.Status200OK;
await context.Response.WriteAsync("Student with index number:" + index + " has the following grades: \n" +
" bla bla bla get grades from database");
await next(); // call next middle ware
}));
//based on the url decide which endpoint should respond
//eg: api/students StudentsController.getStudents
app.UseRouting();
app.UseAuthorization();
/*we split routing and using the endpoints because we may want to use some
* Authorization before actually calling the endpoint
* calls the endpoints*/
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}