Uncaught SyntaxError: Unexpected end of JSON input

[lmj0011]

Nothing has changed in my code since upgrading from v1.4.5 to v1.5.0, however, I'm getting this syntax error when sending message between clients:

The JSON is being broken somehow:

{
    "method": "join",
    "body": {
        "channel": "testsite:575e286967c52:sim1",
        "data": {
            "default_info": {
                "user_data": {
                    "id": 3,
                    "username": "sim1",
                    "rank": 100,
                    "zip": "56894",
                    "href": "http://www.testsite.com/users/sim1",
                    "last_login_at": "1467261409"
                }
            },
            "user": "3",
            "client": "855cdfc3-5dd6-4af4-b005-fc12653f780  //here string is not terminated and missing '}'

This prevents my messages from being sent.

---

for my app I'm using:
front-end: centrifuge-js
back-end: centrifugo-1.5.0-linux-amd64

[FZambia]

Hello! Do you use Memory or Redis engine? Is this reproduced all the time?

[lmj0011]

The default, Memory.
It's reproduced everytime.

[FZambia]

Hm.. Can't find what can cause this bug, and can not reproduce it. Could you post all websocket messages from chrome network console (Network -> WS)?

[FZambia]

I will also try that particular build as soon as I get to linux machine.

[FZambia]

Just tried to run on Centos 6 – works well... Could you also show the output of these 2 commands from machine where Centrifugo running (maybe you are using wrong build for your architecture)?

uname -a

and

cat /proc/cpuinfo

[lmj0011]

Just tried to run on Centos 6 – works well... Could you also show the output of these 2 commands from machine where Centrifugo running (maybe you are using wrong build for your architecture)?

uname -a
and

cat /proc/cpuinfo

forge@forge-virtual-machine:~/www/client1/BGateway$ uname -a
Linux forge-virtual-machine 3.19.0-49-generic #55-Ubuntu SMP Fri Jan 22 02:10:24 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux


forge@forge-virtual-machine:~/www/client1/BGateway$ cat /proc/cpuinfo
processor   : 0
vendor_id   : GenuineIntel
cpu family  : 6
model       : 26
model name  : Intel(R) Xeon(R) CPU           W3565  @ 3.20GHz
stepping    : 5
microcode   : 0x19
cpu MHz     : 3200.000
cache size  : 8192 KB
physical id : 0
siblings    : 1
core id     : 0
cpu cores   : 1
apicid      : 0
initial apicid  : 0
fpu     : yes
fpu_exception   : yes
cpuid level : 11
wp      : yes
flags       : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf pni ssse3 cx16 sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer hypervisor lahf_lm ida dtherm tsc_adjust
bugs        :
bogomips    : 6400.00
clflush size    : 64
cache_alignment : 64
address sizes   : 42 bits physical, 48 bits virtual
power management:

processor   : 1
vendor_id   : GenuineIntel
cpu family  : 6
model       : 26
model name  : Intel(R) Xeon(R) CPU           W3565  @ 3.20GHz
stepping    : 5
microcode   : 0x19
cpu MHz     : 3200.000
cache size  : 8192 KB
physical id : 2
siblings    : 1
core id     : 0
cpu cores   : 1
apicid      : 2
initial apicid  : 2
fpu     : yes
fpu_exception   : yes
cpuid level : 11
wp      : yes
flags       : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf pni ssse3 cx16 sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer hypervisor lahf_lm ida dtherm tsc_adjust
bugs        :
bogomips    : 6400.00
clflush size    : 64
cache_alignment : 64
address sizes   : 42 bits physical, 48 bits virtual
power management:

(maybe you are using wrong build for your architecture)?

I'm using the same build I used for v1.4.5

[lmj0011]

Hm.. Can't find what can cause this bug, and can not reproduce it. Could you post all websocket messages from chrome network console (Network -> WS)?

Nothing shows in the Network section of Chrome Web Console for this

[FZambia]

Can you write into gitter chat - more comfortable to chat when debugging

[lmj0011]

this is the data I'm sending in new Centrifuge({})

let data = '{"user_data":'+ JSON.stringify(this.app.whoiami) +'}';

this.app.whoiami is just an object with some user properties, just like in the original post^^

[FZambia]

Could you post all the code? Including new Centrifuge(..., subscription, publish etc? Because join messages use connection parameters. Also websocket frames can provide a great help (https://stackoverflow.com/questions/5751495/debugging-websocket-in-google-chrome)

[FZambia]

@lmj0011 any news on this?

[lmj0011]

Give me until the end of the week to update this with more code. Sorry I've been quite busy. This Sunday at the latest.

[FZambia]

@lmj0011 just reproduced this! will try to fix asap.

[lmj0011]

👍😀 that's great. Now I don't have to upload my confusing code

[FZambia]

@lmj0011 hope fixed this in 1.5.1 – could you check it out?

[lmj0011]

Just tested it, was not able to reproduce the error.
👍

[FZambia]

Cool! Thanks for report!