better error handling for this

src/quotesite.nim

@@ -199,48 +199,50 @@ routes:
       fail()
 
   get "/@kind/@id":
-    var
-      title: string = ""
-      ctx: Context
-      rows: seq[Row]
-      qid: int = 0
-
     try:
-      qid = (@"id").parseInt
-    except:
-      qid = (@"id").decodeURLSimple()
-      redirect "/" & @"kind" & "/" & $qid
+      var
+        title: string = ""
+        ctx: Context
+        rows: seq[Row]
+        qid: int = 0
 
-    case @"kind":
-    of "browse":
-      rows = db.getAllRows(sql"SELECT * FROM quotes where deleted=0 ORDER BY time desc LIMIT 20 OFFSET ?", (qid * 20))
+      try:
+        qid = (@"id").parseInt
+      except:
+        qid = (@"id").decodeURLSimple()
+        redirect "/" & @"kind" & "/" & $qid
 
-      title = "page " & @"id"
-    of "quotes":
-      rows = db.getAllRows(sql"SELECT * FROM quotes WHERE id = ?", qid)
+      case @"kind":
+      of "browse":
+        rows = db.getAllRows(sql"SELECT * FROM quotes where deleted=0 ORDER BY time desc LIMIT 20 OFFSET ?", (qid * 20))
 
-      title = "#" & $qid & " by " & rows[0][2]
-    else:
-      if (@"kind").startsWith "hashtag-":
-        let channel = (@"kind").replace("hashtag-", "#")
+        title = "page " & @"id"
+      of "quotes":
+        rows = db.getAllRows(sql"SELECT * FROM quotes WHERE id = ?", qid)
 
-        rows = db.getAllRows(sql"SELECT * FROM quotes WHERE channel=?, deleted=0 ORDER BY time desc LIMIT 20 OFFSET ?", channel, qid * 20)
-
-        title = channel & " page " & @"id"
+        title = "#" & $qid & " by " & rows[0][2]
       else:
-        halt Http404, "not found"
+        if (@"kind").startsWith "hashtag-":
+          let channel = (@"kind").replace("hashtag-", "#")
 
-    ctx = newContext()
-    var quoteSeq = newSeq[Context]()
+          rows = db.getAllRows(sql"SELECT * FROM quotes WHERE channel=?, deleted=0 ORDER BY time desc LIMIT 20 OFFSET ?", channel, qid * 20)
 
-    for row in items(rows):
-      var c = newContext()
-      c.contextQuote row[0].parseInt(), row
-      quoteSeq.add c
+          title = channel & " page " & @"id"
+        else:
+          halt Http404, "not found"
 
-    ctx["quotes"] = quoteSeq
-    ctx.pagination(qid, @"kind")
+      ctx = newContext()
+      var quoteSeq = newSeq[Context]()
 
-    renderMustache(title, browseTemplate, ctx)
+      for row in items(rows):
+        var c = newContext()
+        c.contextQuote row[0].parseInt(), row
+        quoteSeq.add c
+
+      ctx["quotes"] = quoteSeq
+      ctx.pagination(qid, @"kind")
+
+      renderMustache(title, browseTemplate, ctx)
+    except: fail()
 
 runForever()