Cron Task to Download CSV and Dump Into MySQL

[ncc50446]

Hey,
Ok..Trying to wrap my head around this..
Basically, what I'm trying to do is every thirty minutes, download a csv file, and then dump it into MySQL database, so that I can view the results from my PHP website...
I haven't tested this yet (Never used a cron before), but from my searching, to setup the cron, I would use:
 

0,30 * * * * wget -O - http://example.com/test.csv

But..Once I have the csv file..I can't seem to figure out what to do with it...Maybe I'm just tired, but I have no idea how to get it into the database...A push in the right direction would help a lot..

 

(In case it matters, using Debian, everything up-to-date)

 

Thanks!

[Sikh]

You would then run a sql query via MySQL command line. So you would set up another cron to run a minute or an hour later. Depending on how long it takes the csv to download. So you figure out the time it takes to download the csv and then run a bash script at that time interval. I Think it's cleaner to point cron to a bash script that runs the sql query instead of inside the cron file.

Look up MySQL queries view command line.

Example

$ mysql -u vivek -p -e 'SELECT COUNT(*) FROM quotes' cbzquotes

Source: http://www.cyberciti.biz/faq/run-sql-query-directly-on-the-command-line/

So you would just run an import into the table your php script parses for the data.

[ncc50446]

A bash script..That's a good idea...Never used one of those either, I'll have to read up on those, thank for the suggestion!

And I should have figured out MySQL from command line...Think I've been staring at lines of code for too long today..Think I was partly trying to over-complicate things...lol Never liked it too much though...I still need to get more comfortable with command line.

But I'll look into the bash script idea, thanks!

[Sikh]

Bash scripts are easy and wonderful. Throw a quick file together and name it .sh. Make it executable by running chmod +x filename.sh

Example:

#!/bin/sh

MySQL -u user -p password -h localhost -e 'query'

Put the above 2 lines in a file, save it and have cron run the file.

Same cron entry like above with obviously different interval. The command will be /path/to/script.sh

Cron run it as root so you don't have to worry about permissions just make sure it's executable.

[ncc50446]

Thanks :)

I had thought about learning about Bash scripts when I was trying to learn Linux, but could never think of a use for it, so never got around to it lol Looks fairly straight forward..Hopefully this weekend I'll have time to play around with it, I'll let you know how it goes!

[Sikh]

Alright let me know. I'll be available all weekend and I'm following this thread

[ncc50446]

Ok, finally had a chance to work on this..Had to work on something else for the project quickly.

Anyways, I'm getting commands not found...

#!/bin/sh

wget "http://www.example.com/test.csv"

sleep 40

MySQL -u user -p password

use databseName

load data local infile 'table.csv' into table tableName
IGNORE 1 LINES
fields terminated by ','
enclosed by '"'
lines terminated by '\n'
(column1, column2, column3, column4, column5, column6, column7)

And I get this returned:

/var/www/html/scripts/test.sh: line 7: MySQL: command not found
/var/www/html/scripts/test.sh: line 9: use: command not found
/var/www/html/scripts/test.sh: line 11: load: command not found
/var/www/html/scripts/test.sh: line 12: IGNORE: command not found
/var/www/html/scripts/test.sh: line 13: fields: command not found
/var/www/html/scripts/test.sh: line 14: enclosed: command not found
/var/www/html/scripts/test.sh: line 15: lines: command not found
/var/www/html/scripts/test.sh: line 16: column1,: command not found

It seemed to have downloaded the file..However when I check /var/www/html/scripts/, the csv file isn't there..

But still not sure what to do about the commands not found..What did I do wrong..?

[Haggis Veteran]

try this

mysql -user<user> -p<pass> databseName -e'
  statement one;
  statement two;
  ...
  statment n;
  '

[ncc50446]

Thanks! Using something similar..(I had quotes in there, so changed it to QUERY_INPUT)

#!/bin/sh

wget -O table.csv "http://www.example.com/table.csv"

sleep 40

mysql -u<user> -p<password> dataBase <<QUERY_INPUT

load data local infile 'table.csv' into table testing
fields terminated by ','
enclosed by '"'
lines terminated by '\n'
IGNORE 1 ROWS
(column1, column2, column3, column4, column5, column6, column7)
QUERY_INPUT

the 'mysql' part needed to be lowercase as well.

That's the final file for anyone who needs it.

The 'sleep 40' is there to make sure the file downloads before loading MySQL.

'Ignore 1 Rows' is to ignore the first row

 

Thanks for the help!

 

Marking Sikh's as the answer, however thank you Haggis as well!

[Sikh]

Didn't get notifications for this, gurrrr. Thanks haggis for helping out.

 

Glad you figured it out. I would make the sleep a minute or two just incase mysql gets tied up for some reason. Its always good to overestimate then it is to underestimate because if you don't get email notifications that your script is running or failed to run, the next time you look at it, it might have not been working for 2 weeks or 2 days.

 

So I recommend up'ing the sleep

[ncc50446]

Thanks for the suggestion! Think I will up it then

[Sikh]

Yeah np. I've learned my lesson and now have all of my servers at work email me everytime my cron job is successfully ran and if my script actually ran or failed

[ncc50446]

How would I go about setting it up to email me when it fails?