ipfs gateway后端列表，自动拉取与排序

src/Common.js

@@ -1,8 +1,6 @@
 import React, { Component, PureComponent } from 'react';
 import { format_time, Time, TitleLine } from './infrastructure/widgets';
-
 import HtmlToReact from 'html-to-react';
-
 import './Common.css';
 import {
   URL_PID_RE,
@@ -12,7 +10,7 @@ import {
   TAG_RE,
   split_text,
 } from './text_splitter';
-
+import { save_config } from './Config';
 import renderMd from './Markdown';
 
 export { format_time, Time, TitleLine };
@@ -418,3 +416,29 @@ export class ClickHandler extends PureComponent {
     );
   }
 }
+
+export function test_ipfs(hash) {
+  let key = 'testing_' + hash;
+  window[key] = { curr: 0 };
+  window.config.ipfs_gateway_list.forEach((url) => {
+    fetch(url.replaceAll('<hash>', hash), { method: 'HEAD' })
+      .then((res) => {
+        if (res.ok) {
+          console.log(url, 'success!');
+          if (window[key]) {
+            window[key].curr += 1;
+            window[key][url] = window[key].curr;
+            let list = window.config.ipfs_gateway_list;
+            list.sort(
+              (x, y) => (window[key][x] || 9999) - (window[key][y] || 999),
+            );
+            window.config.ipfs_gateway_list = list;
+            save_config(false);
+          }
+        }
+      })
+      .catch((e) => {
+        console.log(url, 'fail!');
+      });
+  });
+}