Connecting to Cayley serving over localhost - node.js

Question

I've followed the 'Getting Started' guide in Cayley's documentation and installed Cayley on my remote server:
Getting Started: https://github.com/google/cayley
Server OS: CentOS 7.2.1511
I've added cayley to my $PATH:
echo $PATH :
/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/csse/cayley/src/github.com/google/cayley
Here is my config file at /etc/cayley.cfg
{
"database": "leveldb",
"db_options": {
"cache_size_mb": 2,
"write_buffer_mb": 20
},
"db_path": "~/cayley/src/github.com/google/cayley/data/testdata.nq",
"listen_host": "127.0.0.1",
"listen_port": "64210",
"read_only": false,
"replication_options": {
"ignore_missing": false,
"ignore_duplicate": false
},
"timeout": 30
}
I serve cayley over http by simply doing:
cayley http
and the terminal outputs:
Cayley now listening on 127.0.0.1:64210
On my main machine (Mac OSX 10.10.5 Yosemite), I've used npm to install the cayley package and written a test:
##testconnection.js
var cayley = require('cayley');
var client = cayley("137.112.104.107");
var g = client.graph;
g.V().All(function(err, result) {
if(err) {
console.log('error');
} else {
console.log('result');
}
});
However, it fails when I run it: node testconnection.js
error: Error: Invalid URI "137.112.104.107/api/v1/query/gremlin"
I'd like to connect to Cayley and modify the database from my test. I've found a great powerpoint full of Cayley information:
https://docs.google.com/presentation/d/1tCbsYym1kXWWDcnRU9ymj6xP0Nvgq-Qhy9WDmqWcM-o/edit#slide=id.g3776708f1_0319
As well as pertinent Cayley docs:
Overview Doc
Configuration Doc
HTTP API Doc
And a post on stackoverflow:
Cayley db user and password protection over HTTP connections
But I'm struggling to come up with a way to connect Cayley (on my remote machine) with my local machine. I'd like to connect with npm if possible, but am open to other options. Where am I going wrong?
Edit #1
I've appended the "http://" to my ip, so now it reads http://137.112.104.107. At that point, I solved another issue by performing
cayley init --config=/etc/cayley.cfg
as mentioned by the author here
I've also removed the listen_post and listen_port from my config file (each individually first, then both), yet have still have the same socket hang up error. Here's a printout of client from the test script:
Client {
host: 'http://137.112.104.107',
request:
{ [Function]
get: [Function],
head: [Function],
post: [Function],
put: [Function],
patch: [Function],
del: [Function],
cookie: [Function],
jar: [Function],
defaults: [Function] },
graph: Gremlin { client: [Circular], query: [Function] },
g: Gremlin { client: [Circular], query: [Function] },
write: [Function: bound ],
delete: [Function: bound ],
writeFile: [Function: bound ]
}

Answer 1

Your Cayley server is listening on 127.0.0.1 / localhost and therefor not reachable from another machine. To be able to reach it from a virtual machine or another computer on your network it needs to bind to an interface that is reachable.
If you configure host: 0.0.0.0 and check what is your network IP (I assume: 137.112.104.107) and connect it, it should work or you need to open it or forward the port on your firewall (depending on your network).