How to convert the byte[] response to a list or dictionary or object?

Question

0.00/5 (No votes)

See more:

I am getting response for the command -sentinel masters against redis server.

public string GetMasterFromSentinel(string sentinelAddress)
        {
            TcpClient server;

            try
            {
                var splittedAddress = sentinelAddress.Split(':');
                server = new TcpClient(splittedAddress[0], int.Parse(splittedAddress[1]));
            }
            catch (SocketException)
            {
                // _log.Error("Unable to connect to server");
                return string.Empty;
            }
            NetworkStream ns = server.GetStream();
            var payload = new byte[] { 0x2a, 0x32, 0x0d, 0x0a, 0x24, 0x38, 0x0d, 0x0a, 0x73, 0x65, 0x6e, 0x74, 0x69, 0x6e, 0x65, 0x6c, 
                0x0d, 0x0a, 0x24, 0x37, 0x0d, 0x0a, 0x6d, 0x61, 0x73, 0x74, 0x65, 0x72, 0x73, 0x0d, 0x0a };
            ns.Write(payload, 0, payload.Length);
            ns.Flush();

            var data = new byte[1024];
            ns.Read(data, 0, data.Length);

            ns.Close();
            server.Close();
            string output = string.Empty;
           
            foreach (byte b in data)
                output += (Char)b;
           
           //i have put remove nulls from the string
            output = output.Replace("\r\n", string.Empty).Replace("$","|");

            return output;
        }

Value of output before removing nulls:"*1\r\n*40\r\n$4\r\nname\r\n$8\r\nmymaster\r\n$2\r\nip\r\n$12\r\n10.93.247.96\r\n$4\r\nport\r\n$4\r\n6379\r\n$5\r\nrunid\r\n$40\r\n03ba9934d84efe28e583f4dca03f5b6c710bd712\r\n$5\r\nflags\r\n$6\r\nmaster\r\n$21\r\nlink-pending-commands\r\n$1\r\n0\r\n$13\r\nlink-refcount\r\n$1\r\n1\r\n$14\r\nlast-ping-sent\r\n$1\r\n0\r\n$18\r\nlast-ok-ping-reply\r\n$3\r\n134\r\n$15\r\nlast-ping-reply\r\n$3\r\n134\r\n$23\r\ndown-after-milliseconds\r\n$5\r\n10000\r\n$12\r\ninfo-refresh\r\n$4\r\n6802\r\n$13\r\nrole-reported\r\n$6\r\nmaster\r\n$18\r\nrole-reported-time\r\n$8\r\n76627249\r\n$12\r\nconfig-epoch\r\n$1\r\n6\r\n$10\r\nnum-slaves\r\n$1\r\n1\r\n$19\r\nnum-other-sentinels\r\n$1\r\n1\r\n$6\r\nquorum\r\n$1\r\n2\r\n$16\r\nfailover-timeout\r\n$6\r\n180000\r\n$14\r\nparallel-syncs\r\n$1\r\n1\r\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"

Value of Output after removing nulls:
"*1*40$4name$8mymaster$2ip$1210.73.247.36$4port$46379$5runid$4003ba9934d84efe28e583f4dca03f5b6c710bd712$5flags$6master$21link-pending-commands$10$13link-refcount$11$14last-ping-sent$10$18last-ok-ping-reply$3958$15last-ping-reply$3958$23down-after-milliseconds$510000$12info-refresh$48689$13role-reported$6master$18role-reported-time$876879953$12config-epoch$16$10num-slaves$11$19num-other-sentinels$11$6quorum$12$16failover-timeout$6180000$14parallel-syncs$11\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"

I need to convert the respective key and values in a dictionary or object.

What I have tried:

I have tried removing the nulls from output.
Is there proper way to filter/parse the information sent by redis server?
The actual response from Redis will be like:
1) 1) "name"
2) "resque"
3) "ip"
4) "127.0.0.1"
5) "port"
6) "7789"
...

Posted 16-May-17 22:36pm

Member 1097736

Updated 16-May-17 23:17pm

v2

Add a Solution

Comments

Richard MacCutchan 17-May-17 4:53am

"Is there proper way to filter/parse the information"
Yes, check the documentation to find out the exact structure of the returned information.

Member 1097736 17-May-17 4:57am

I have updated it. Can you check?

Richard MacCutchan 17-May-17 4:59am

No, because I do not have the documentation.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Kornfeld Eliyahu Peter · Accepted Answer · 2017-05-16T23:17:00

These parts of redist are not documented as far as I know...
However here how you can parse it...

First notice that the data is separated by classic C carriage-return+newline (\r\n)... So you should interpret it line by line...
Lines beginning with * (asterisk) are counters...
So the first line (*1) means you have 1 block (one master)
The second line (*40) means, that there are 40 values... but as every value preceded with its length you actually have 80 lines...
Now the lines with $ (dollar) are length indicator of the lines after them...
Like '$4' and 'name' are two lines connected (4 is the length of the string 'name')
If you break it down, what you have got here is this:

*1
*40
$4
name
$8
mymaster
$2
ip
$12
10.93.247.96
$4
port
$4
6379
$5
runid
$40
03ba9934d84efe28e583f4dca03f5b6c710bd712
$5
flags
$6
master
$21
link-pending-commands
$1
0
$13
link-refcount
$1
1
$14
last-ping-sent
$1
0
$18
last-ok-ping-reply
$3
134
$15
last-ping-reply
$3
134
$23
down-after-milliseconds
$5
10000
$12
info-refresh
$4
6802
$13
role-reported
$6
master
$18
role-reported-time
$8
76627249
$12
config-epoch
$1
6
$10
num-slaves
$1
1
$19
num-other-sentinels
$1
1
$6
quorum
$1
2
$16
failover-timeout
$6
180000
$14
parallel-syncs
$1
1

And if you clean it up:

name					=	mymaster
ip						=	10.93.247.96
port					=	6379
runid					=	03ba9934d84efe28e583f4dca03f5b6c710bd712
flags					=	master
link-pending-commands	=	0
link-refcount			=	1
last-ping-sent			=	0
last-ok-ping-reply		=	134
last-ping-reply			=	134
down-after-milliseconds	=	10000
info-refresh			=	6802
role-reported			=	master
role-reported-time		=	76627249
config-epoch			=	6
num-slaves				=	1
num-other-sentinels		=	1
quorum					=	2
failover-timeout		=	180000
parallel-syncs			=	1