From 7c18a3d4e5897adb4ddd141aed261ce63daf1a10 Mon Sep 17 00:00:00 2001 From: tv Date: Wed, 24 Aug 2011 17:05:23 +0200 Subject: gold: move tracer to own subdir --- gold/scex/tracer/index.js | 58 +++++++++++++++++++++++++++++++++++++++++++++++ gold/scex/tracer/slurp.js | 38 +++++++++++++++++++++++++++++++ 2 files changed, 96 insertions(+) create mode 100644 gold/scex/tracer/index.js create mode 100644 gold/scex/tracer/slurp.js (limited to 'gold/scex/tracer') diff --git a/gold/scex/tracer/index.js b/gold/scex/tracer/index.js new file mode 100644 index 00000000..e0c706e7 --- /dev/null +++ b/gold/scex/tracer/index.js @@ -0,0 +1,58 @@ +var http = require('http'); +var slurp = require('./slurp'); + +var options = { + host: 'scexchange.bitparking.com', + port: 8080, + path: '/api/t2' +}; + +var last_id = 0; +var last_price = 0; +function t2 () { + http.get(options, function(res) { + slurp(res, function (data) { + try { + data = JSON.parse(data); + } catch (exn) { + return console.error('' + exn.stack + ''); + }; + data + .sort(function (a, b) { + return a.id - b.id; + }) + .forEach(function (x) { + if (x.id > last_id) { + last_id = x.id; + + x.date = new Date(Number(x.date) * 1000); + + var price = x.price.toString(); + while (price.length < 'x.xxxxxxxx'.length) { + price += 0; + } + if (x.price > last_price) { + price = '' + price + '' + } + if (x.price < last_price) { + price = '' + price + '' + } + last_price = x.price; + + var c = ({ buy: '', sell: '' })[x.type]; + var m = ''; + m += x.id + m += ' ' + JSON.parse(JSON.stringify(x.date)) + m += ' ' + price + m += ' ' + c + x.amount + '' + console.log(m); + + }; + }); + }); + }).on('error', function(e) { + console.log("Got error: " + e.message); + }); +}; + +setInterval(t2, 1000); diff --git a/gold/scex/tracer/slurp.js b/gold/scex/tracer/slurp.js new file mode 100644 index 00000000..70319743 --- /dev/null +++ b/gold/scex/tracer/slurp.js @@ -0,0 +1,38 @@ +module.exports = (function () { + + function join_buffers (buffers, length) { + var buffer = new Buffer(length); + var targetStart = 0; + buffers.forEach(function (x) { + x.copy(buffer, targetStart); + targetStart += x.length; + }); + return buffer; + }; + + function finish_it (req, buffers, length, callback) { + req.content = join_buffers(buffers, length); + return callback(req.content); + }; + + function nop () {}; + + return function (req, callback) { + if (req.hasOwnProperty('content')) { + return callback(req.content); + }; + var content = []; + var length = 0; + var end_handler = finish_it; + req.on('data', function (data) { + content.push(data); + length += data.length; + }); + [ 'end', 'close' ].forEach(function (event) { + req.on(event, function () { + finish_it(req, content, length, callback); + end_handler = nop; + }); + }); + }; +})(); -- cgit v1.2.3 From 00f16658347779429335bd30f00bbdea3a03f485 Mon Sep 17 00:00:00 2001 From: tv Date: Wed, 24 Aug 2011 17:52:58 +0200 Subject: scex tracer: add idle_mark support --- gold/scex/tracer/index.js | 91 +++++++++++++++++++++++++++++++---------------- 1 file changed, 61 insertions(+), 30 deletions(-) (limited to 'gold/scex/tracer') diff --git a/gold/scex/tracer/index.js b/gold/scex/tracer/index.js index e0c706e7..7ee6de1b 100644 --- a/gold/scex/tracer/index.js +++ b/gold/scex/tracer/index.js @@ -1,3 +1,10 @@ +#! /usr/bin/env node +// +// usage: [idle_mark=N] tracer +// +// Where the optional idle_mark tells the tracer to output idle marks every N +// seconds. +// var http = require('http'); var slurp = require('./slurp'); @@ -7,9 +14,14 @@ var options = { path: '/api/t2' }; +var interval = 1000; +var idle_mark = Number(process.env.idle_mark) * interval; + var last_id = 0; var last_price = 0; +var last_output = new Date(0); function t2 () { + var now = new Date() http.get(options, function(res) { slurp(res, function (data) { try { @@ -17,42 +29,61 @@ function t2 () { } catch (exn) { return console.error('' + exn.stack + ''); }; - data - .sort(function (a, b) { - return a.id - b.id; - }) - .forEach(function (x) { - if (x.id > last_id) { - last_id = x.id; - - x.date = new Date(Number(x.date) * 1000); - - var price = x.price.toString(); - while (price.length < 'x.xxxxxxxx'.length) { - price += 0; - } - if (x.price > last_price) { - price = '' + price + '' - } - if (x.price < last_price) { - price = '' + price + '' - } - last_price = x.price; - - var c = ({ buy: '', sell: '' })[x.type]; - var m = ''; - m += x.id - m += ' ' + JSON.parse(JSON.stringify(x.date)) + data = data.sort(function (a, b) { + return a.id - b.id; + }).filter(function (x) { + return x.id > last_id; + }); + if (data.length > 0) { + data.forEach(function (x) { + last_id = x.id; + + x.date = new Date(Number(x.date) * 1000); + + var price = render_price(x.price, last_price); + last_price = x.price; + + var c = ({ buy: '', sell: '' })[x.type]; + var m = ''; + m += x.id + m += ' ' + JSON.parse(JSON.stringify(x.date)) + m += ' ' + price + m += ' ' + c + x.amount + '' + console.log(m); + last_output = now; + }); + } else { + if (idle_mark) { + if (now - last_output >= idle_mark) { + var price = render_price(last_price); + var m = last_id + m += ' ' + JSON.parse(JSON.stringify(now)); m += ' ' + price - m += ' ' + c + x.amount + '' console.log(m); - + last_output = now; }; - }); + }; + }; }); }).on('error', function(e) { console.log("Got error: " + e.message); }); }; -setInterval(t2, 1000); +function render_price(price, last_price) { + var rendered_price = price.toString(); + while (rendered_price.length < 'x.xxxxxxxx'.length) { + rendered_price += 0; + }; + if (last_price) { + if (price > last_price) { + rendered_price = '' + rendered_price + '' + }; + if (price < last_price) { + rendered_price = '' + rendered_price + '' + }; + }; + return rendered_price; +}; + +setInterval(t2, interval); -- cgit v1.2.3