Controllers/FetchController.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.EntityFrameworkCore;
+using rockfishCore.Models;
+using rockfishCore.Util;
+
+namespace rockfishCore.Controllers
+{
+    [Produces("text/plain")]
+    [Route("fetch")]
+
+    public class FetchController : Controller
+    {
+        private readonly rockfishContext _context;
+
+        public FetchController(rockfishContext context)
+        {
+            _context = context;
+        }
+
+
+
+        // GET: fetch/somecode/bob@bob.com
+        [HttpGet("{code}/{email}")]
+        public async Task<IActionResult> Get([FromRoute] string code, [FromRoute] string email)
+        {
+            if (!ModelState.IsValid)
+            {
+                return BadRequest(ModelState);
+            }
+
+            var rec = await _context.License.SingleOrDefaultAsync(m => m.Code == code.Trim() && m.Email == email.Trim().ToLowerInvariant() && m.Fetched == false);
+
+            if (rec == null)
+            {
+                //delay, could be someone fishing for a key, make it painful
+                //Have verified this is safe, won't affect other jobs on server
+                //happening concurrently or other requests to server
+                System.Threading.Thread.Sleep(10000);
+                return NotFound();
+            }
+
+
+            rec.Fetched = true;
+            rec.DtFetched = DateUtil.NowAsEpoch();
+            //This might be flaky if behind some other stuff
+            //rec.FetchFrom = HttpContext.Connection.RemoteIpAddress.ToString();
+            _context.Entry(rec).State = EntityState.Modified;
+
+            try
+            {
+                await _context.SaveChangesAsync();
+            }
+            catch (DbUpdateConcurrencyException)
+            {
+                if (!LicenseExists(rec.Id))
+                {
+                    return NotFound();
+                }
+                else
+                {
+                    throw;
+                }
+            }
+
+            return Ok(rec.Key);
+            //return Ok(new {key=rec.Key});
+        }
+
+
+
+
+
+        private bool LicenseExists(long id)
+        {
+            return _context.License.Any(e => e.Id == id);
+        }
+    }
+}