TreeController.cs

using Coscine.WaterbutlerHelper;
using Coscine.WaterbutlerHelper.ReturnObjects;
using Coscine.WaterbutlerHelper.Services;
using Coscine.ApiCommons;
using Coscine.ApiCommons.Factories;
using Coscine.Database.DataModel;
using Coscine.Database.Models;
using Coscine.Database.Util;
using Coscine.Logging;
using Coscine.Metadata;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Web;
using VDS.RDF;
using VDS.RDF.Parsing;
using VDS.RDF.Writing;

namespace Coscine.Api.Tree.Controllers
{
    [Authorize]
    public class TreeController : Controller
    {
        private readonly Authenticator _authenticator;
        private readonly ResourceModel _resourceModel;
        private readonly RdfStoreConnector _rdfStoreConnector;
        private readonly ProjectRoleModel _projectRoleModel;
        private readonly ProjectResourceModel _projectResourceModel;
        private readonly CoscineLogger _coscineLogger;
        private readonly AnalyticsLogObject _analyticsLogObject;
        private readonly IDataSourceService _dataSourceService;
        private readonly WaterbutlerInterface _waterbutlerInterface;
        private readonly string _blobApiLink;
        private readonly string _prefix;

        public TreeController(ILogger<TreeController> logger, IDataSourceService dataSourceService)
        {
            _authenticator = new Authenticator(this, Program.Configuration);
            _resourceModel = new ResourceModel();
            _rdfStoreConnector = new RdfStoreConnector(Program.Configuration.GetStringAndWait("coscine/local/virtuoso/additional/url"));
            _projectRoleModel = new ProjectRoleModel();
            _projectResourceModel = new ProjectResourceModel();

            _coscineLogger = new CoscineLogger(logger);
            _analyticsLogObject = new AnalyticsLogObject();
            _dataSourceService = dataSourceService;
            _waterbutlerInterface = new WaterbutlerInterface(Program.Configuration, _dataSourceService);

            var rule = Program.Configuration.GetStringAndWait("traefik/frontends/Coscine.Api.Blob/routes/Coscine.Api.Blob/rule");
            var host = rule.Substring("Host:".Length, rule.IndexOf(";") - "Host:".Length);
            var path = rule.Substring(rule.IndexOf("/"));
            _blobApiLink = $"https://{host}{path}/blob/";
            _prefix = Program.Configuration.GetStringAndWait("coscine/global/epic/prefix");
        }

        public Uri GenerateId(string resourceId, string path)
        {
            return new Uri($"https://hdl.handle.net/{_prefix}/{resourceId}@path={Uri.EscapeDataString(path)}");
        }

        [HttpGet("[controller]/{resourceId}/{*path}")]
        public async Task<IActionResult> GetMetadata(string resourceId, string path)
        {
            path = $"/{path}";