fixed book in chinese title failed downloading in kobo issue

index.js

@@ -10,6 +10,7 @@ const fs = require('fs')
 const { spawn } = require('child_process')
 const { extname, basename, dirname } = require('path')
 const FileType = require('file-type')
+const ToPinyin = require("chinese-to-pinyin");
 
 const port = 3001
 const expireDelay = 30  // 30 seconds
@@ -25,6 +26,29 @@ const allowedExtensions = ['epub', 'mobi', 'pdf', 'cbz', 'cbr', 'html', 'txt']
 const keyChars = "3469ACEGHLMNPRTY"
 const keyLength = 4
 
+function capitalizeFirstLetter(string) {
+  return string.charAt(0).toUpperCase() + string.slice(1);
+}
+
+function romanizeChinese(filename) {
+  const splitedFilename = filename.split(".");
+  const name = splitedFilename[0];
+  const ext = splitedFilename.pop();
+
+  let pinyinNames = ToPinyin(name, {
+    KeepRest: true,
+    removeTone: true,
+  }).split(' ');
+
+  pinyinNames = pinyinNames.map(n => capitalizeFirstLetter(n));
+  let pinyinName = pinyinNames.join("").replace(/\W/g, ""); //remove punctuation
+  if (pinyinName.length > 40) {
+    pinyinName = pinyinName.substring(0, 40);
+  }
+
+  return pinyinName+'.'+ext;
+}
+
 function randomKey () {
   const choices = Math.pow(keyChars.length, keyLength)
   const rnd = Math.floor(Math.random() * choices)
@@ -160,6 +184,9 @@ router.post('/upload', upload.single('file'), async ctx => {
   const key = ctx.request.body.key.toUpperCase()
 
   if (ctx.request.file) {
+    ctx.request.file.originalname = romanizeChinese(
+      ctx.request.file.originalname
+    );
     console.log('Uploaded file:', ctx.request.file)
   }
 
@@ -355,4 +382,4 @@ fs.rm('uploads', {recursive: true}, (err) => {
     app.listen(port)
     console.log('server is listening on port ' + port)
   })
-})
+})

package-lock.json

@@ -11,6 +11,7 @@
       "dependencies": {
         "@koa/multer": "^3.0.0",
         "@koa/router": "^10.1.0",
+        "chinese-to-pinyin": "^1.3.1",
         "file-type": "^16.5.3",
         "koa": "^2.13.1",
         "koa-logger": "^3.2.1",
@@ -133,6 +134,11 @@
         "node": ">=4"
       }
     },
+    "node_modules/chinese-to-pinyin": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/chinese-to-pinyin/-/chinese-to-pinyin-1.3.1.tgz",
+      "integrity": "sha512-QGB9HmbMLh726Aj3QKB5NcjKDgKn5NCLMz8rmPfKuU5FgwmF4NT2ULh5/2G6Z0pWBcagtKBS08ymaJcYSvbbQg=="
+    },
     "node_modules/co": {
       "version": "4.6.0",
       "resolved": "https://registry.npmjs.org/co/-/co-4.6.0.tgz",
@@ -1037,6 +1043,11 @@
         "supports-color": "^5.3.0"
       }
     },
+    "chinese-to-pinyin": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/chinese-to-pinyin/-/chinese-to-pinyin-1.3.1.tgz",
+      "integrity": "sha512-QGB9HmbMLh726Aj3QKB5NcjKDgKn5NCLMz8rmPfKuU5FgwmF4NT2ULh5/2G6Z0pWBcagtKBS08ymaJcYSvbbQg=="
+    },
     "co": {
       "version": "4.6.0",
       "resolved": "https://registry.npmjs.org/co/-/co-4.6.0.tgz",

package.json

@@ -11,6 +11,7 @@
   "dependencies": {
     "@koa/multer": "^3.0.0",
     "@koa/router": "^10.1.0",
+    "chinese-to-pinyin": "^1.3.1",
     "file-type": "^16.5.3",
     "koa": "^2.13.1",
     "koa-logger": "^3.2.1",