From d7175d0fc5959beb568eea07bfa73ea6d196e23f Mon Sep 17 00:00:00 2001
From: Book Pauk <bookpauk@gmail.com>
Date: Sun, 10 Feb 2019 16:18:39 +0700
Subject: [PATCH] =?UTF-8?q?=D0=9F=D0=BE=D0=BF=D1=80=D0=B0=D0=B2=D0=BA?=
 =?UTF-8?q?=D0=B8=20=D0=BF=D1=80=D0=BE=D0=B3=D1=80=D0=B5=D1=81=D1=81=D0=B0?=
 =?UTF-8?q?=20=D0=B7=D0=B0=D0=B3=D1=80=D1=83=D0=B7=D0=BA=D0=B8?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 client/api/reader.js | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/client/api/reader.js b/client/api/reader.js
index d8ca7348..cddb3c38 100644
--- a/client/api/reader.js
+++ b/client/api/reader.js
@@ -56,11 +56,19 @@ class Reader {
     }
 
     async loadCachedBook(url, callback){
+        const response = await axios.get(url, {method: 'HEAD'});
+
+        let estSize = 1000000;
+        if (response.headers['content-length']) {
+            estSize = response.headers['content-length'];
+        }
+
         const options = {
             onDownloadProgress: progress => {
-                const total = (progress.total ? progress.total : progress.loaded + 200000);
+                while (progress.loaded > estSize) estSize *= 1.5;
+
                 if (callback)
-                    callback({state: 'loading', progress: Math.round((progress.loaded*100)/total)});
+                    callback({state: 'loading', progress: Math.round((progress.loaded*100)/estSize)});
             }
         }
         //загрузка