linux dash widgets aren't loading [Ubuntu + Python] #453

mhellmeier · 2017-12-27T16:38:53Z

The Problem

I tried to install linux dash but it isn't working: The widgets loading the hole time:

The widgets "CPU Avg Load" and "CPU Utilization" seem to work:

Steps to reproduce

Cloning the git repository and starting linux dash using python:

git clone --depth 1 https://github.com/afaqurk/linux-dash.git
cd linux-dash/app/server
python index.py --port 8500

I also tried running python with sudo or download the master.zip file using curl, but I run into the same problem

After starting the Server with sudo python index.ph --port 8500 I got: Starting server, use <Ctrl-C> to stop

If a open Linux Dash in my Chrome browser, I get the following console output on my server:

127.0.0.1 - - [27/Dec/2017 17:29:48] "GET / HTTP/1.1" 200 -
127.0.0.1 - - [27/Dec/2017 17:29:48] "GET /linuxDash.min.css HTTP/1.1" 200 -
127.0.0.1 - - [27/Dec/2017 17:29:48] "GET /linuxDash.min.js HTTP/1.1" 200 -
127.0.0.1 - - [27/Dec/2017 17:29:49] code 404, message File Not Found: /websocket
127.0.0.1 - - [27/Dec/2017 17:29:49] "GET /websocket HTTP/1.1" 404 -
127.0.0.1 - - [27/Dec/2017 17:29:49] "GET /server/?module=current_ram HTTP/1.1" 200 -
127.0.0.1 - - [27/Dec/2017 17:29:49] "GET /server/?module=swap HTTP/1.1" 200 -
top: Invalid user
127.0.0.1 - - [27/Dec/2017 17:29:49] "GET /server/?module=disk_partitions HTTP/1.1" 200 -
127.0.0.1 - - [27/Dec/2017 17:29:49] "GET /server/?module=cpu_intensive_processes HTTP/1.1" 200 -
top: bad pid 'ython'
127.0.0.1 - - [27/Dec/2017 17:29:49] "GET /server/?module=ram_intensive_processes HTTP/1.1" 200 -
top: unknown option 'l'
Usage:
  top -hv | -bcHiOSs -d secs -n max -u|U user -p pid(s) -o field -w [cols]
top: unknown option 'l'
Usage:
  top -hv | -bcHiOSs -d secs -n max -u|U user -p pid(s) -o field -w [cols]
top: unknown option 'l'
Usage:
  top -hv | -bcHiOSs -d secs -n max -u|U user -p pid(s) -o field -w [cols]
top: unknown option 'l'
Usage:
  top -hv | -bcHiOSs -d secs -n max -u|U user -p pid(s) -o field -w [cols]
top: unknown option 'l'
Usage:
  top -hv | -bcHiOSs -d secs -n max -u|U user -p pid(s) -o field -w [cols]
top: unknown option 'l'
Usage:
  top -hv | -bcHiOSs -d secs -n max -u|U user -p pid(s) -o field -w [cols]
127.0.0.1 - - [27/Dec/2017 17:29:49] "GET /server/?module=load_avg HTTP/1.1" 200 -
top: bad pid 's'
top: unknown option 'a'
Usage:
  top -hv | -bcHiOSs -d secs -n max -u|U user -p pid(s) -o field -w [cols]
top: unknown option 'l'
Usage:
  top -hv | -bcHiOSs -d secs -n max -u|U user -p pid(s) -o field -w [cols]
top: bad delay interval 'f'
top: unknown option 'a'
Usage:
  top -hv | -bcHiOSs -d secs -n max -u|U user -p pid(s) -o field -w [cols]
127.0.0.1 - - [27/Dec/2017 17:29:49] "GET /server/?module=docker_processes HTTP/1.1" 200 -
127.0.0.1 - - [27/Dec/2017 17:29:52] "GET /server/?module=cpu_utilization HTTP/1.1" 200 -

The Chrome console also shows some errors:

Failed to load resource: the server responded with a status of 404 (File Not Found: /websocket)
linuxDash.min.js:101 SyntaxError: Unexpected token \ in JSON at position 2
    at JSON.parse (<anonymous>)
    at oc (linuxDash.min.js:14)
    at Yb (linuxDash.min.js:76)
    at linuxDash.min.js:77
    at r (linuxDash.min.js:7)
    at Vc (linuxDash.min.js:77)
    at c (linuxDash.min.js:78)
    at linuxDash.min.js:111
    at k.$eval (linuxDash.min.js:125)
    at k.$digest (linuxDash.min.js:122)
(anonymous) @ linuxDash.min.js:101
linuxDash.min.js:101 SyntaxError: Unexpected token \ in JSON at position 3
    at JSON.parse (<anonymous>)
    at oc (linuxDash.min.js:14)
    at Yb (linuxDash.min.js:76)
    at linuxDash.min.js:77
    at r (linuxDash.min.js:7)
    at Vc (linuxDash.min.js:77)
    at c (linuxDash.min.js:78)
    at linuxDash.min.js:111
    at k.$eval (linuxDash.min.js:125)
    at k.$digest (linuxDash.min.js:122)
(anonymous) @ linuxDash.min.js:101
2linuxDash.min.js:101 SyntaxError: Unexpected token \ in JSON at position 4
    at JSON.parse (<anonymous>)
    at oc (linuxDash.min.js:14)
    at Yb (linuxDash.min.js:76)
    at linuxDash.min.js:77
    at r (linuxDash.min.js:7)
    at Vc (linuxDash.min.js:77)
    at c (linuxDash.min.js:78)
    at linuxDash.min.js:111
    at k.$eval (linuxDash.min.js:125)
    at k.$digest (linuxDash.min.js:122)
(anonymous) @ linuxDash.min.js:101
linuxDash.min.js:101 SyntaxError: Unexpected token \ in JSON at position 2
    at JSON.parse (<anonymous>)
    at oc (linuxDash.min.js:14)
    at Yb (linuxDash.min.js:76)
    at linuxDash.min.js:77
    at r (linuxDash.min.js:7)
    at Vc (linuxDash.min.js:77)
    at c (linuxDash.min.js:78)
    at linuxDash.min.js:111
    at k.$eval (linuxDash.min.js:125)
    at k.$digest (linuxDash.min.js:122)
(anonymous) @ linuxDash.min.js:101
linuxDash.min.js:101 SyntaxError: Unexpected token \ in JSON at position 4
    at JSON.parse (<anonymous>)
    at oc (linuxDash.min.js:14)
    at Yb (linuxDash.min.js:76)
    at linuxDash.min.js:77
    at r (linuxDash.min.js:7)
    at Vc (linuxDash.min.js:77)
    at c (linuxDash.min.js:78)
    at linuxDash.min.js:111
    at k.$eval (linuxDash.min.js:125)
    at k.$digest (linuxDash.min.js:122)
(anonymous) @ linuxDash.min.js:101
linuxDash.min.js:1984 Uncaught TypeError: Cannot set property 'width' of undefined
    at linuxDash.min.js:1984
    at c (linuxDash.min.js:32)

My System

> lsb_release -a
Distributor ID:	Ubuntu
Description:	Ubuntu 16.04.3 LTS
Release:	16.04
Codename:	xenial

> python --version
Python 2.7.12

The text was updated successfully, but these errors were encountered:

duckzito · 2018-01-01T19:39:11Z

Try this: edit linux_json_api.sh and replace "s/\"/\\\\\"/g" with 's/\\//g' on _parseAndPrint function.
The line should look like this: $ECHO -n "$data" | $SED -r 's/\\//g' | $TR -d "\n";

I tried it in go version and it's working.

mhellmeier · 2018-01-02T14:04:28Z

Thanks @duckzito , it solved my problem!
I think this is a Linux Dash bug, isn't it!? I will create a pull request.

carnivorouz · 2018-02-05T18:43:43Z

Thanks @duckzito, also worked for me on korora running it with python.

davidawad · 2018-03-05T20:57:25Z

just confirming that this is still an issue with the latest release of this repo. I encountered it today and the above suggested fix solved the problem for me.

vsxen · 2018-03-18T14:06:16Z

you can replace | _parseAndPrint with #| _parseAndPrint or delete | _parseAndPrint

TwanoO67 · 2018-06-12T12:26:08Z

Hello,

I have the same problem here, on Ubuntu + PHP

top: unknown option 'l'
Usage:
  top -hv | -bcHiOSs -d secs -n max -u|U user -p pid(s) -o field -w [cols]
top: bad pid 's'
top: unknown option 'a'
Usage:
  top -hv | -bcHiOSs -d secs -n max -u|U user -p pid(s) -o field -w [cols]
top: unknown option 'l'
Usage:
  top -hv | -bcHiOSs -d secs -n max -u|U user -p pid(s) -o field -w [cols]
top: unknown option 'a'

But the solution of @duckzito didn't work

alozovskoy · 2018-06-12T20:14:28Z

@TwanoO67 , this error is because linux-dash try to get docker information, and if you dont have docker ("type -P docker" return nothing) arguments pass to top command, not for "docker top". Solution of @duckzito is for fixing json formatter, it's another issue.

Do you have errors in browser developer console?

TwanoO67 · 2018-06-13T10:19:29Z

Hi @alozovskoy ,
I had to remove linux-dash as it was flooding my server with errors twice by second.
Is there no test to know which module (like docker) is installed or not on the server, before trying to get its state ?

alozovskoy · 2018-06-13T11:32:45Z

Hi @TwanoO67 ,
At now - no test. I maked simple check for a docker (#466), so now i dont get any errors like this, but i didn't do a full rewiev of all functions so you may get an another errors about some uncorrect call of another function.

SuperSpe · 2019-02-22T14:12:08Z

this solved my problem too!
what about cpu temp?

Fix #453 - Linux Dash Python widget loading problem

mildmojo · 2020-03-23T21:07:10Z

FWIW, I just cloned the repo today to try it out, and none of the boxes were loading for me (Ubuntu 19.10, running using the NodeJS ./bin/linux-dash). I did the reverse of duckzito's first advice. This fixed it for me:

Edit app/server/linux_json_api.sh
In _parseAndPrint, change 's/\\//g' to "s/\"/\\\\\"/g"

Here's the patch:

diff --git a/app/server/linux_json_api.sh b/app/server/linux_json_api.sh
index 16f573e..1bbea30 100755
--- a/app/server/linux_json_api.sh
+++ b/app/server/linux_json_api.sh
@@ -12,7 +12,7 @@ PS=$(type -P ps)
 
 _parseAndPrint() {
   while read data; do
-    $ECHO -n "$data" | $SED -r 's/\\//g' | $TR -d "\n";
+    $ECHO -n "$data" | $SED -r "s/\"/\\\\\"/g" | $TR -d "\n";
   done;
 }

AnotherDaniel · 2020-03-27T10:32:49Z

FWIW, I just cloned the repo today to try it out, and none of the boxes were loading for me (running using the NodeJS ./bin/linux-dash). I did the reverse of duckzito's first advice. This fixed it for me:
1. Edit `app/server/linux_json_api.sh`

2. In `_parseAndPrint`, change `'s/\\//g'` to `"s/\"/\\\\\"/g"`
Here's the patch:
diff --git a/app/server/linux_json_api.sh b/app/server/linux_json_api.sh
index 16f573e..1bbea30 100755
--- a/app/server/linux_json_api.sh
+++ b/app/server/linux_json_api.sh
@@ -12,7 +12,7 @@ PS=$(type -P ps)
 
 _parseAndPrint() {
   while read data; do
-    $ECHO -n "$data" | $SED -r 's/\\//g' | $TR -d "\n";
+    $ECHO -n "$data" | $SED -r "s/\"/\\\\\"/g" | $TR -d "\n";
   done;
 }

Same here - in my case, I just migrated a bunch of stuff from a Raspi 3 to a 4, linux-dash one of them.
On the 3, the short regex worked ('s/\//g'). On the 4, I get the issue reported by OP. But when reverting to the long regex ("s/"/\\"/g"), things are fine again on the 4.

On the 3 I was running Raspian strech, while the 4 is running buster...

PrzemekSkw · 2021-01-20T12:55:43Z

@AnotherDaniel Hi, I have the same bug in Debian 10 and Your solution help me. Thank You.
Regards.

fitzroymckay · 2021-02-05T03:49:12Z

FWIW, I just cloned the repo today to try it out, and none of the boxes were loading for me (Ubuntu 19.10, running using the NodeJS ./bin/linux-dash). I did the reverse of duckzito's first advice. This fixed it for me:

Edit app/server/linux_json_api.sh

In _parseAndPrint, change 's/\\//g' to "s/\"/\\\\\"/g"

Here's the patch:
diff --git a/app/server/linux_json_api.sh b/app/server/linux_json_api.sh
index 16f573e..1bbea30 100755
--- a/app/server/linux_json_api.sh
+++ b/app/server/linux_json_api.sh
@@ -12,7 +12,7 @@ PS=$(type -P ps)
 
 _parseAndPrint() {
   while read data; do
-    $ECHO -n "$data" | $SED -r 's/\\//g' | $TR -d "\n";
+    $ECHO -n "$data" | $SED -r "s/\"/\\\\\"/g" | $TR -d "\n";
   done;
 }

Thank you! Tried it on ElementaryOS 5.1.7, worked like a charm

ecdeveloper · 2021-03-29T06:51:40Z

How come this issue is closed given that the bug is still there? I had the same exact problem and had to manually update the linux_json_api making the change from the suggested snippet to fix it.

dylanjamesdev · 2021-05-02T22:41:12Z

Agreed

ugur1yildiz · 2022-01-13T21:04:24Z

FWIW, I just cloned the repo today to try it out, and none of the boxes were loading for me (Ubuntu 19.10, running using the NodeJS ./bin/linux-dash). I did the reverse of duckzito's first advice. This fixed it for me:

Edit app/server/linux_json_api.sh

In _parseAndPrint, change 's/\\//g' to "s/\"/\\\\\"/g"

Here's the patch:
diff --git a/app/server/linux_json_api.sh b/app/server/linux_json_api.sh
index 16f573e..1bbea30 100755
--- a/app/server/linux_json_api.sh
+++ b/app/server/linux_json_api.sh
@@ -12,7 +12,7 @@ PS=$(type -P ps)
 
 _parseAndPrint() {
   while read data; do
-    $ECHO -n "$data" | $SED -r 's/\\//g' | $TR -d "\n";
+    $ECHO -n "$data" | $SED -r "s/\"/\\\\\"/g" | $TR -d "\n";
   done;
 }

FYI. This change fails for node.js, If you intend to use node.js, don't apply this patch.

mhellmeier mentioned this issue Dec 27, 2017

linux-dash keep loading #319

Closed

mhellmeier mentioned this issue Jan 2, 2018

Fix #453 - Linux Dash Python widget loading problem #455

Merged

alozovskoy mentioned this issue Aug 10, 2019

no data display #475

Open

ppp225 added a commit to ppp225/linux-dash that referenced this issue Aug 30, 2019

https://github.com/afaqurk/linux-dash/issues/453

4cf0102

srogovtsev added a commit to srogovtsev/linux-dash that referenced this issue Dec 21, 2019

Temporary fix for tariqbuilds#453

d638c05

tariqbuilds closed this as completed in 45893f0 Mar 22, 2020

tariqbuilds added a commit that referenced this issue Mar 22, 2020

Merge pull request #455 from mhellmeier/master

f05dca8

Fix #453 - Linux Dash Python widget loading problem

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linux dash widgets aren't loading [Ubuntu + Python] #453

linux dash widgets aren't loading [Ubuntu + Python] #453

mhellmeier commented Dec 27, 2017

duckzito commented Jan 1, 2018 •

edited

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mhellmeier commented Jan 2, 2018

carnivorouz commented Feb 5, 2018

davidawad commented Mar 5, 2018 •

edited

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vsxen commented Mar 18, 2018

TwanoO67 commented Jun 12, 2018 •

edited

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alozovskoy commented Jun 12, 2018

TwanoO67 commented Jun 13, 2018

alozovskoy commented Jun 13, 2018

SuperSpe commented Feb 22, 2019

mildmojo commented Mar 23, 2020 •

edited

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AnotherDaniel commented Mar 27, 2020

PrzemekSkw commented Jan 20, 2021

fitzroymckay commented Feb 5, 2021

ecdeveloper commented Mar 29, 2021

dylanjamesdev commented May 2, 2021

ugur1yildiz commented Jan 13, 2022

linux dash widgets aren't loading [Ubuntu + Python] #453

linux dash widgets aren't loading [Ubuntu + Python] #453

Comments

mhellmeier commented Dec 27, 2017

The Problem

Steps to reproduce

My System

duckzito commented Jan 1, 2018 • edited Loading

mhellmeier commented Jan 2, 2018

carnivorouz commented Feb 5, 2018

davidawad commented Mar 5, 2018 • edited Loading

vsxen commented Mar 18, 2018

TwanoO67 commented Jun 12, 2018 • edited Loading

alozovskoy commented Jun 12, 2018

TwanoO67 commented Jun 13, 2018

alozovskoy commented Jun 13, 2018

SuperSpe commented Feb 22, 2019

mildmojo commented Mar 23, 2020 • edited Loading

AnotherDaniel commented Mar 27, 2020

PrzemekSkw commented Jan 20, 2021

fitzroymckay commented Feb 5, 2021

ecdeveloper commented Mar 29, 2021

dylanjamesdev commented May 2, 2021

ugur1yildiz commented Jan 13, 2022

duckzito commented Jan 1, 2018 •

edited

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davidawad commented Mar 5, 2018 •

edited

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TwanoO67 commented Jun 12, 2018 •

edited

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mildmojo commented Mar 23, 2020 •

edited

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