Refactor api code

src/api/utils.nim

@@ -0,0 +1,32 @@
+import httpclient, asyncdispatch, htmlparser
+import strutils, json, xmltree, uri
+
+template newClient*() {.dirty.} =
+  var client = newAsyncHttpClient()
+  defer: client.close()
+  client.headers = headers
+
+proc fetchHtml*(url: Uri; headers: HttpHeaders; jsonKey = ""): Future[XmlNode] {.async.} =
+  newClient()
+
+  var resp = ""
+  try:
+    resp = await client.getContent($url)
+  except:
+    return nil
+
+  if jsonKey.len > 0:
+    let json = parseJson(resp)[jsonKey].str
+    return parseHtml(json)
+  else:
+    return parseHtml(resp)
+
+proc fetchJson*(url: Uri; headers: HttpHeaders): Future[JsonNode] {.async.} =
+  newClient()
+
+  var resp = ""
+  try:
+    resp = await client.getContent($url)
+    result = parseJson(resp)
+  except:
+    return nil