003_UncompressedDataTransmission.md

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Bottleneck: Uncompressed Data Transmission

Platform

OS	OS version	Langage
Android	-	Java

Main caracteristics

ID	Title	Category	Sub-category
EBOT003	Uncompressed Data Transmission	Environment	Bottleneck

Severity / Remediation Cost

Severity	Remediation Cost
Minor	Easy

Rule short description

Prefer using GzipOutputStream instead of OutputStream to improve energy efficiency.

Rule complete description

Text

Transmitting a file over a network infrastructure without compressing it consumes more energy than with compression. More precisely, energy efficiency is improved in case the data is compressed at least by 10%, transmitted and decompressed at the other network node. From the Android client side, it means making a post HTTP request using a GZIPOutputStream instead of the classical OutputStream, along with the HttpURLConnection object.

HTML

<p>Transmitting a file over a network infrastructure without compressing it consumes more energy than with compression. More precisely, energy efficiency is improved in case the data is compressed at least by 10%, transmitted and decompressed at the other network node. From the Android client side, it means making a post HTTP request using a <code>GZIPOutputStream</code> instead of the classical OutputStream, along with the <code>HttpURLConnection</code> object.</p>
<h2>Noncompliant Code Example</h2>
<pre>
Url url = new Url("https://www.ecocode.io/");
HttpsUrlConnection con = (HttpsURLConnection) url.openConnection();
OutputStream stream = con.getOutputStream();
</pre>
<h2>Compliant Code Example</h2>
<pre>
Url url = new Url("https://www.ecocode.io/");
HttpsUrlConnection con = (HttpsURLConnection) url.openConnection();
OutputStream stream = new GZIPOutputStream(con.getOutputStream());
</pre>

Implementation principle

If an OutputStream class is created:

• if the method getOutputStream from the URLConnection class is called, reports the issue.
• if a constructor is called with parameter getOutputStream of URLConnection, reports the issue if the constructor isn't a GZIPOutputStream.