Sponsored Content
Top Forums Shell Programming and Scripting Complex string operation (awk, sed, other?) Post 302784517 by usshadowop on Friday 22nd of March 2013 11:33:33 AM
Old 03-22-2013
Complex string operation (awk, sed, other?)

I have a file that contains RewriteRules for 200 countries (2 examples for 1 country below):

Code:
RewriteRule ^/at(/|/index.html|)$ http://%{HTTP_HOST}/locate/index.html?locale=de_AT [R=301,L]

#&

RewriteRule ^/at_english(/|/index.html|)$ http://%{HTTP_HOST}/locate/index.html?locale=en_AT [R=301,L]

I have another list of redirects for the mobile versions of these sites in the following format:
Code:
RewriteRule ^/at_engilsh(/|/index.html|)$ http://%{HTTP_HOST}m.website.com/www.website.com/at_engilsh [R=301,L]

Bear in mind the at_english is just 1 of the country codes, there are many more.

So my goals is to go from

Code:
RewriteRule ^/at_english(/|/index.html|)$ http://%{HTTP_HOST}/locate/index.html?locale=en_AT [R=301,L]

#to

RewriteRule ^/at_engilsh(/|/index.html|)$ http://%{HTTP_HOST}m.website.com/www.website.com/at_engilsh [R=301,L]

I'm supplying the awk / pseudo code for one way I've thought to do it.

Code:
awk '
{
newurl="m.website.com/www.website.com/"
one=substr($0,1,14)
two=substr($1,13,37)
rest=substr($4,1)

# The line below this comment is the section I'm having difficulty with because 
#I have country codes in multiple formats at / at_engilsh / at_french
#I want to select all characters between ^/ ---> (  
code=substr($2,1) 
     

printf ("%s%s%s%s%s %s\n", one,code,two,newurl,code, rest)
}' input

So I either need help converting the pseudo code into actual code, or suggestions on a better way to do this operation.

Thank you for any help
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Complex Sed/Awk Question?

Hello, So i have this file called /apps/turnout which looks like that of the contents of the /etc/shadow (but not exactly) the file has a long list in it. basically, the contents of this file looks something similar to the following: jajajajalala:D#$#AFVAdfda lalabavisof:#%R@fafla#$... (3 Replies)
Discussion started by: SkySmart
3 Replies

2. Shell Programming and Scripting

string operation

i am new user of unix.i have a question.My script is- export STR_ALFA=`head -2 "${FILE_PATH}"|tail -1|cut -d"," -f1` "${TEST_HOME}"/function/chk_alfa.ksh STR_ALFA now i want to check STR_ALFA: 1)whether is alphabetic 2)whether is numeric 3)whether is alphanumeric... (1 Reply)
Discussion started by: arghya_owen
1 Replies

3. UNIX for Dummies Questions & Answers

string operation

I am trying to ask for full name in a script, Then echo back to the user with the surname only, omitting the first name. Thanks (2 Replies)
Discussion started by: orjnet
2 Replies

4. Shell Programming and Scripting

SED complex string replacement

sed -i 's:"ps -ef | grep $(cat $PID_FILE) | grep -v grep":"ps -C java -o pid,cmd | grep ${SERVER_NAME} | cut -d' ' -f1 | grep -v grep":g' scriptName That's what I'm attempting to do. I'm attempting to replace this: ps -ef | grep $(cat $PID_FILE) | grep -v grep with this: ps -C java -o... (5 Replies)
Discussion started by: cbo0485
5 Replies

5. Shell Programming and Scripting

Help - Search for string, then do string operation on line

Hi, I wish to find all lines that contain a specific search word, and then do few string operations on that line. The idea is to "fix" the file which has been moved from windows to unix. Using unix - Sun Solaris Test input ("t2.sas") statement1 statement2 libname yahoo ... (6 Replies)
Discussion started by: deepaksinbox
6 Replies

6. Shell Programming and Scripting

sed or awk command to replace a string pattern with another string based on position of this string

here is what i want to achieve... consider a file contains below contents. the file size is large about 60mb cat dump.sql INSERT INTO `table1` (`id`, `action`, `date`, `descrip`, `lastModified`) VALUES (1,'Change','2011-05-05 00:00:00','Account Updated','2012-02-10... (10 Replies)
Discussion started by: vivek d r
10 Replies

7. Programming

How to replace the complex strings from a file using sed or awk?

Dear All, I am having a requirement to find the difference between 2 files and generate a discrepancy report out of it as an html page. I prefer using diff -y file1 file2 since it gives user friendly layout to know any discrepancy in the record and unique records among the 2 file. Here's how it... (12 Replies)
Discussion started by: Badhrish
12 Replies

8. Shell Programming and Scripting

Replace string in XML file with awk/sed with string from another

Sorry for the long/weird title but I'm stuck on a problem I have. I have this XML file: </member> <member> <name>TransactionID</name> <value><string>123456789123456</string></value> </member> <member> <name>Number</name> ... (9 Replies)
Discussion started by: cozzin
9 Replies

9. Shell Programming and Scripting

Multiple Replacement in a Text File in one operation (sed/awk) ?

Hi all, Saying we have two files: 1. A "Reference File" whose content is "Variable Name": "Variable Value" 2. A "Model File" whose content is a model program in which I want to substitute "VariableName" with their respective value to produce a third file "Program File" which would be a... (4 Replies)
Discussion started by: dae
4 Replies

10. Shell Programming and Scripting

Complex Filter using grep, awk or sed

Hi, I'm not very familiar witrh sed or awk and hope the somebody can help me to solve my problem. I need to filter a text report using grep, sed or awk. I would like to cut out text lines with the pattern INFO and if exists the following lines of the pattern DETAILS. I need te keep the lines with... (4 Replies)
Discussion started by: Frankg
4 Replies
A2P(1)							 Perl Programmers Reference Guide						    A2P(1)

NAME
a2p - Awk to Perl translator SYNOPSIS
a2p [options] [filename] DESCRIPTION
A2p takes an awk script specified on the command line (or from standard input) and produces a comparable perl script on the standard output. OPTIONS Options include: -D<number> sets debugging flags. -F<character> tells a2p that this awk script is always invoked with this -F switch. -n<fieldlist> specifies the names of the input fields if input does not have to be split into an array. If you were translating an awk script that processes the password file, you might say: a2p -7 -nlogin.password.uid.gid.gcos.shell.home Any delimiter can be used to separate the field names. -<number> causes a2p to assume that input will always have that many fields. -o tells a2p to use old awk behavior. The only current differences are: o Old awk always has a line loop, even if there are no line actions, whereas new awk does not. o In old awk, sprintf is extremely greedy about its arguments. For example, given the statement print sprintf(some_args), extra_args; old awk considers extra_args to be arguments to "sprintf"; new awk considers them arguments to "print". "Considerations" A2p cannot do as good a job translating as a human would, but it usually does pretty well. There are some areas where you may want to examine the perl script produced and tweak it some. Here are some of them, in no particular order. There is an awk idiom of putting int() around a string expression to force numeric interpretation, even though the argument is always integer anyway. This is generally unneeded in perl, but a2p can't tell if the argument is always going to be integer, so it leaves it in. You may wish to remove it. Perl differentiates numeric comparison from string comparison. Awk has one operator for both that decides at run time which comparison to do. A2p does not try to do a complete job of awk emulation at this point. Instead it guesses which one you want. It's almost always right, but it can be spoofed. All such guesses are marked with the comment ""#???"". You should go through and check them. You might want to run at least once with the -w switch to perl, which will warn you if you use == where you should have used eq. Perl does not attempt to emulate the behavior of awk in which nonexistent array elements spring into existence simply by being referenced. If somehow you are relying on this mechanism to create null entries for a subsequent for...in, they won't be there in perl. If a2p makes a split line that assigns to a list of variables that looks like (Fld1, Fld2, Fld3...) you may want to rerun a2p using the -n option mentioned above. This will let you name the fields throughout the script. If it splits to an array instead, the script is probably referring to the number of fields somewhere. The exit statement in awk doesn't necessarily exit; it goes to the END block if there is one. Awk scripts that do contortions within the END block to bypass the block under such circumstances can be simplified by removing the conditional in the END block and just exiting directly from the perl script. Perl has two kinds of array, numerically-indexed and associative. Perl associative arrays are called "hashes". Awk arrays are usually translated to hashes, but if you happen to know that the index is always going to be numeric you could change the {...} to [...]. Iteration over a hash is done using the keys() function, but iteration over an array is NOT. You might need to modify any loop that iterates over such an array. Awk starts by assuming OFMT has the value %.6g. Perl starts by assuming its equivalent, $#, to have the value %.20g. You'll want to set $# explicitly if you use the default value of OFMT. Near the top of the line loop will be the split operation that is implicit in the awk script. There are times when you can move this down past some conditionals that test the entire record so that the split is not done as often. For aesthetic reasons you may wish to change index variables from being 1-based (awk style) to 0-based (Perl style). Be sure to change all operations the variable is involved in to match. Cute comments that say "# Here is a workaround because awk is dumb" are passed through unmodified. Awk scripts are often embedded in a shell script that pipes stuff into and out of awk. Often the shell script wrapper can be incorporated into the perl script, since perl can start up pipes into and out of itself, and can do other things that awk can't do by itself. Scripts that refer to the special variables RSTART and RLENGTH can often be simplified by referring to the variables $`, $& and $', as long as they are within the scope of the pattern match that sets them. The produced perl script may have subroutines defined to deal with awk's semantics regarding getline and print. Since a2p usually picks correctness over efficiency. it is almost always possible to rewrite such code to be more efficient by discarding the semantic sugar. For efficiency, you may wish to remove the keyword from any return statement that is the last statement executed in a subroutine. A2p catches the most common case, but doesn't analyze embedded blocks for subtler cases. ARGV[0] translates to $ARGV0, but ARGV[n] translates to $ARGV[$n-1]. A loop that tries to iterate over ARGV[0] won't find it. ENVIRONMENT
A2p uses no environment variables. AUTHOR
Larry Wall <larry@wall.org> FILES
SEE ALSO
perl The perl compiler/interpreter s2p sed to perl translator DIAGNOSTICS
BUGS
It would be possible to emulate awk's behavior in selecting string versus numeric operations at run time by inspection of the operands, but it would be gross and inefficient. Besides, a2p almost always guesses right. Storage for the awk syntax tree is currently static, and can run out. perl v5.12.4 2011-06-01 A2P(1)
All times are GMT -4. The time now is 01:51 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy