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README tutorial now reflects the new proto

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antirez 2009-05-22 18:44:44 +02:00
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@ -81,22 +81,21 @@ our key was added without problems. Actually SET can never fail but
the "+OK" sent lets us know that the server received everything and
the command was actually executed.<br/><br/>Let's try to get the key content now:<br/><br/><pre class="codeblock python python" name="code">
GET foo
3
$3
bar
</pre>Ok that's very similar to 'set', just the other way around. We sent &quot;get foo&quot;,
the server replied with a first line that is just a number of bytes the value
stored at key contained, followed by the actual bytes. Again &quot;\r\n&quot; are appended
both to the bytes count and the actual data.<br/><br/>What about requesting a non existing key?<br/><br/><pre class="codeblock python python python" name="code">
the server replied with a first line that is just the $ character follwed by
the number of bytes the value stored at key contained, followed by the actual
bytes. Again &quot;\r\n&quot; are appended both to the bytes count and the actual data. In Redis slang this is called a bulk reply.<br/><br/>What about requesting a non existing key?<br/><br/><pre class="codeblock python python python" name="code">
GET blabla
nil
</pre>When the key does not exist instead of the length just the &quot;nil&quot; string is sent.
Another way to check if a given key exists or not is indeed the EXISTS command:<br/><br/><pre class="codeblock python python python python" name="code">
$-1
</pre>When the key does not exist instead of the length, just the &quot;$-1&quot; string is sent. Since a -1 length of a bulk reply has no meaning it is used in order to specifiy a 'nil' value and distinguish it from a zero length value. Another way to check if a given key exists or not is indeed the EXISTS command:<br/><br/><pre class="codeblock python python python python" name="code">
EXISTS nokey
0
:0
EXISTS foo
1
</pre>As you can see the server replied '0' the first time since 'nokey' does not
exist, and '1' for 'foo', a key that actually exists.<br/><br/>Ok... now you know the basics, read the <a href="CommandReference.html">REDIS COMMAND REFERENCE</a> section to
:1
</pre>As you can see the server replied ':0' the first time since 'nokey' does not
exist, and ':1' for 'foo', a key that actually exists. Replies starting with the colon character are integer reply.<br/><br/>Ok... now you know the basics, read the <a href="CommandReference.html">REDIS COMMAND REFERENCE</a> section to
learn all the commands supported by Redis and the <a href="ProtocolSpecification.html">PROTOCOL SPECIFICATION</a>
section for more details about the protocol used if you plan to implement one
for a language missing a decent client implementation.<h1><a name="License">License</a></h1>Redis is released under the BSD license. See the COPYING file for more information.<h1><a name="Credits">Credits</a></h1>Redis is written and maintained by Salvatore Sanfilippo, Aka 'antirez'.<br/><br/>Enjoy,