Need help in creating a Unix Script to parse xml file


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# 1  
Need help in creating a Unix Script to parse xml file

Hi All,

My requirement is create an unix script to parse the xml file and display the values of the Elements/value between the tags on console. Like say, I would like to fetch the value of errorCode from the below xml which is 'U007' and display it. Can we use SED command for this? I have tried using the following command but is not working:
Code:
sed -n -e "s/<errorCode>\([a-z]*[0-9]*\)<\/errorCode>/\1/p" /x01/hub/data/incoming/Txn200802251031080012-093624998419.xml

Code:
<gDSNError>
  <errorCode>U007</errorCode> 
  <errorDescription>00093624998419|BEST_BUY_LONG_DESCRIPTION|PDQ Import - The value coded against this attribute exceeds the maximum field length. Please amend & resend.</errorDescription> 
  <errorDateTime>2008-02-26T09:04:11.728-00:00</errorDateTime> 
  </gDSNError>

Can anyone please help me in creating the unix script to parse and display the values between the tags. Its damn urgent requirement for me I would be very thankful if anyone can help me on this

Last edited by Yogesh Sawant; 04-10-2008 at 08:26 AM.. Reason: added code tags
# 2  
Please provide us with the sample input and output
# 3  
Code:
awk '/<errorCode>/ {
 gsub(/<errorCode>|<\/errorCode>/,"")
 print $0
}' file

use a dedicated xml parser for more complex operations
# 4  
the sample xml input file is as below:

<gDSNError>
<errorCode>U007</errorCode>
<errorDescription>00093624998419|BEST_BUY_LONG_DESCRIPTION|PDQ Import - The value coded against this attribute exceeds the maximum field length. Please amend & resend.</errorDescription>
<errorDateTime>2008-02-26T09:04:11.728-00:00</errorDateTime>
</gDSNError>

I tried getting the values between the tags using the following code and I am able to get it:

#to get Error Description

Error_Desc = grep "<errorDescription>.*<.errorDescription>" {#hub_in_dir} | sed -e "s/^.*<errorDescription/<errorDescription/" | cut -f2 -d">"| cut -f1 -d"<"
Error_Code = grep "<errorCode>.*<.errorCode>" {#hub_in_dir} | sed -e "s/^.*<errorCode/<errorCode/" | cut -f2 -d">"| cut -f1 -d"<"

in addition my requirement is to write the values to the file with comma seperated. The output file should be something like specified below all in 1 line:

U007, 00093624998419|BEST_BUY_LONG_DESCRIPTION|PDQ Import - The value coded against this attribute exceeds the maximum field length. Please amend & resend, 2008-02-26T09:04:11.728-00:00
# 5  
of course you can use a complicated awk script to do this (and handle the cases when the sequence of data is something else than you gave above), but i would suggest you import the xml file in a database (for example, ms access or ms excel) and then run an sql query to extract the data the way you want. i think access can also create normalised tables for you.
# 6  
In our case as we get very large xml's and xml's being varying every time it may become bit complex to import the data to database and as i only need 2 or 3 tag values from the whole xml i dont find the need to import whole data to database. I can fetch those by using SED or awk Scripts.

please suggest me the way I can write the fetched data to a file in 1 line with comma separated using unix script(ksh or sh).

Input sample xml file:

<gDSNError>
<errorCode>U007</errorCode>
<errorDescription>00093624998419|BEST_BUY_LONG_DESCRIPTION|PDQ Import - The value coded against this attribute exceeds the maximum field length. Please amend & resend.</errorDescription>
<errorDateTime>2008-02-26T09:04:11.728-00:00</errorDateTime>
</gDSNError>

The output should be something like as below:

U007, 00093624998419|BEST_BUY_LONG_DESCRIPTION|PDQ Import - The value coded against this attribute exceeds the maximum field length. Please amend & resend, 2008-02-26T09:04:11.728-00:00
# 7  
Try this:

Code:
awk 'BEGIN{FS="<|>"}
NF==5&&!f{printf("%s",$3);f=1;next}
NF==5&&f{printf(",%s",$3)}
END{print ""}
' file

Regards

Last edited by Franklin52; 04-10-2008 at 02:39 PM..
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