Parsing feed from mtgox not working

[zQueal]

I was attempting to use TickTick to render the current price of BTC form MtGox via a terminal and Bash. It seems easy enough, however, I'm unable to get it to print the current price.

#!/bin/bash

. /root/.bin/ticktick.sh

DATA=`curl http://data.mtgox.com/api/2/BTCUSD/money/ticker`

tickParse "$DATA"

echo ``data["last"]``

Outputs:

root@ks4003010 .bin]$ sh btc
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
105  1367    0  1367    0     0   9669      0 --:--:-- --:--:-- --:--:-- 19253

root@ks4003010 .bin]$ 

The script itself seems to work just fine, it's simply not printing the requested information. Any advice?

[kristopolous]

it's the $. $'s are supported for variable injection. It's part of the syntax. You need to escape them.

Good luck with your investments. Looks like a fun ride.

[zQueal]

@kristopolous,

Thanks so far for the help! I would have never thought of that (I'm still new to bash).

However, I still don't have it working quite yet:

#!/bin/bash

. /root/.bin/ticktick.sh

DATA=`curl -silent http://data.mtgox.com/api/2/BTCUSD/money/ticker`

tickParse ${DATA}

echo ``data{last}{display_short}``

I silenced curl, and was able to figure out how to escape ${DATA} but I'm still not able to return the information I want, which is stored: data->last->display_short.

Any ideas?

[kristopolous]

I'll look more into it. But if you are new to bash then I sincerely and empathetically plead you to not use this library. The P languages (perl, python, php) along with node and ruby are great at this kind of thing. They are really truly fantastic.

If I was going to do what you were doing, even as the author of the library, I'd do it in php or node.

[zQueal]

I was almost positive I explained, but now that I look, I didn't. I work on many terminals throughout a day, some have PHP, Perl, Ruby, and Python, and some have none. The reason why I chose bash is because they all run linux. At heart I'm a pretty confident PHP developer, so I've already been able to accomplish this easily with PHP:

#!/usr/bin/env php
<?php

$c = curl_init();
curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($c, CURLOPT_HTTPHEADER, array('Accept: application/json', 'Content-Type: application/json'));
curl_setopt($c, CURLOPT_URL, 'http://data.mtgox.com/api/2/BTCUSD/money/ticker');

$data = curl_exec($c);
curl_close($c);

$obj = json_decode($data);

echo print_r($obj->{'data'}->{'last'}->{'display_short'}."\n", true);

?>

But as I said, not all the terminals I work at carry PHP. But I do see what you mean about being new to bash and relying on a single library. Perhaps I'll simply set up a curl option instead.

Regardless, thanks for the help! :+1:

[kristopolous]

they don't all have perl? that's pretty ubiquitous. Well ok ... let me look into this more. here I'll even reopen it.

[kristopolous]

ok so i've looked further. There's really no parent object support like what you are using.

echo ``data["last"]``

What happens is that the code gets rewritten in bash.

if you ran this:

set | grep ^__tick_data

you'll get this after the tickparse

__tick_data_data_last_local_display_short=5.60
__tick_data_data_last_local_value=95.59992
__tick_data_data_last_local_value_int=9559992
...
__tick_data_data_now=1366041828601185
__tick_data_data_sell_currency=USD
__tick_data_data_sell_display=5.60

If you do this:

echo ``data["last"].items()`

You'll see all your vars

__tick_data_data_last_all_currency __tick_data_data_last_all_display 
__tick_data_data_last_all_display_short __tick_data_data_last_all_value 
__tick_data_data_last_all_value_int __tick_data_data_last_currency 
__tick_data_data_last_display __tick_data_data_last_display_short 
__tick_data_data_last_local_currency __tick_data_data_last_local_display 
__tick_data_data_last_local_display_short __tick_data_data_last_local_value 
__tick_data_data_last_local_value_int __tick_data_data_last_orig_currency 
__tick_data_data_last_orig_display __tick_data_data_last_orig_display_short 
__tick_data_data_last_orig_value __tick_data_data_last_orig_value_int 
__tick_data_data_last_value __tick_data_data_last_value_int

so you can do something like this:

echo ``data.last.orig.value``

And I get

95.30002

You can use any thing else in that list. Take out the "__tickdata" and then replace the _ with . and there you go.

[zQueal]

Well, I guess I shouldn't say that; all Perl scripts are restricted from running except for a set of white-listed scripts; for security purposes.

I've updated the script to reflect your changes:

root@term503 ~]$ btc
59.23001
root@term503 ~]$ 

And as you can see, it's working like a charm! Thanks very much for your continued support!