diff --git a/src/SnippetRegistry.ts b/src/SnippetRegistry.ts
index 485874a..a9a27b7 100644
--- a/src/SnippetRegistry.ts
+++ b/src/SnippetRegistry.ts
@@ -1,6 +1,7 @@
 import fetch from 'node-fetch';
 import { Host, Snippet, NewSnippet } from './types';
-import { URLSearchParams } from 'url';
+import { URLSearchParams, URL } from 'url';
+import { window } from 'vscode';
 
 class SnippetRegistry {
   public host: Host;
@@ -16,7 +17,8 @@ class SnippetRegistry {
 
   private endpoint(name: string) {
     const { host, version } = this.host;
-    return `${host}/api/v${version}/${name}`;
+    const ret = new URL(`/api/v${version}/${name}`, host);
+    return ret;
   }
 
   private get(endpoint: string) {
@@ -33,10 +35,14 @@ class SnippetRegistry {
   }
 
   public getSnippets(page?: number, perPage?: number): Promise<Snippet[]> {
-    const search = new URLSearchParams({
-      page: page ? page.toString() : undefined,
-      per_page: perPage ? perPage.toString() : undefined,
-    });
+    const params = {} as { [key: string]: string };
+    if (page) {
+      params.page = page.toString();
+    }
+    if (perPage) {
+      params.perPage = perPage.toString();
+    }
+    const search = new URLSearchParams(params);
     return this.get('snippets/public?' + search.toString()).then((res) =>
       res.json()
     );
diff --git a/src/addHost.ts b/src/addHost.ts
index 1615ee8..85e95e4 100644
--- a/src/addHost.ts
+++ b/src/addHost.ts
@@ -2,26 +2,21 @@ import { window, Memento } from 'vscode';
 import SnippetRegistry from './SnippetRegistry';
 import hostManager from './hostManager';
 
-const PROTOCOL = 'https://';
-
 export default async function addHost(state: Memento, defaultValue?: string) {
   let host = await window.showInputBox({
     ignoreFocusOut: true,
     prompt: 'Enter your gitlab host',
-    value: defaultValue || PROTOCOL,
+    value: defaultValue || 'https://',
     validateInput(value) {
-      if (value && value.replace(PROTOCOL, '').trim()) {
-        return null;
+      if (!/https?:\/\//.test(value)) {
+        return 'Must start with "http://" or "https://" protocal';
       }
-      return 'Must enter a valid host';
+      return null;
     },
   });
   if (!host) {
     return;
   }
-  if (!host.startsWith(PROTOCOL)) {
-    host = PROTOCOL + host;
-  }
   const token = await window.showInputBox({
     ignoreFocusOut: true,
     prompt: 'Enter your gitlab token',