Error while running Lua script from redis client

Question

I have the "Hello World" program in Lua script. I am trying to call the script from (Chocolatey) Redis client. I keep getting this error (error) ERR Error compiling script (new function): user_script:1: function argument expected near '.'

Redis Script: "hello.lua"

local msg = "Hello, world!"
return msg

Chocolatey Redis Client:

127.0.0.1:6379> EVAL "D:\hello.lua" 0

Error Message

(error) ERR Error compiling script (new function): user_script:1: function argument expected near '.'

Itamar Haber · Accepted Answer · 2016-02-05 14:33:32Z

6

EVAL accepts the script itself, not a filename.

Try this:

EVAL 'local msg = "Hello, world!" return msg' 0

EDIT: to execute a script in a file, redis-cli provides the --eval switch that you can use as follows:

redis-cli --eval <path-to-script-file> [key1 [key2] ...] , [arg1 [arg2] ...]

I'm not familiar with the Windows fork, but it should be supported by it as well in all likelihood.

In *nix, you can also use the shell to provide the contents of the script to the cli, for example:

redis-cli SCRIPT LOAD "$(cat path-to-script-file)"

will load the contents in the file to Redis. There should be a similar way for achieving this in Windows but that's outside my current scope ;)

edited Feb 5, 2016 at 14:33

answered Feb 5, 2016 at 13:24

Itamar Haber

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4 Comments

invincible Over a year ago

Thanks for your quick reply Itamar. I finally could see the output. I was struggling with it for a long time. Thank you again. Also can you please help me with how to call a lua scipt file from redis client. How can I pass the parameters to the file and accept the values returned from the script file.

Itamar Haber Over a year ago

I assume you're using the Windows cli as your client - correct?

invincible Over a year ago

I use the "start redis-server" and "start redis-cli" commands in the Windows cmd to start the Redis Server and Client respectively. They are also command prompts and I try to fetch the data from this client.

Itamar Haber Over a year ago

@invincible if you find my answer adequate, please mark it so

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