how to find output lines between two patters(they are the same)

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box;
}

I'm trying to parse some log file, which each line starts with time stamp, such as:

[11/16/18 16:40:04:097 EST]

If there isn't any error in the log, then every line will have the same starting pattern. However, if some error occurs, then the whole error stack will be printed with the time stamp as following:

[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName 

Additional Data: 

    null

Current exception:

Message:

_ERR_BSAFE_FUNCTION

Stack trace:

What I want to do is extra the whole error stack, for example, the input is:

[11/16/18 16:40:04:098 EST] 000000ae CommandLogger 2   PerfLog <entry operation="Command : com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl" parameters="@releaseID=9.0 

[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName 

Additional Data: 

    null

Current exception:

Message:

_ERR_BSAFE_FUNCTION

Stack trace:

[11/16/18 16:40:04:101 EST] 000000ae SystemErr     R   

[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.

    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)

The ideal out put should be:

[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName 

Additional Data: 

    null

Current exception:

Message:

_ERR_BSAFE_FUNCTION

Stack trace: 

[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.

    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)

Tried the following and failed, if you can let me know what's wrong with my code, it would be great.

import re, sys



if len(sys.argv) > 1:

    with open(sys.argv[1]) as f:

        text = f.read()

else:

    text = sys.stdin.read()



p_start = r'^[d{2}/.*'

p_end = r'^[d{2}/.*'





pattern = r'{p0}(?!.*{p0})(?:.*?{p1}|.*)'.format(p0=p_start, p1=p_end)



error_no_match = 'No Match'



matches = re.findall(pattern, text, flags=re.M|re.DOTALL)



if matches:

    for match in matches:

        print 'match:', match

    print len(matches)

else:

    print error_no_match

asked Nov 26 '18 at 20:21

Ian Zhang

919

You seem to need re.findall(r'(?m)^[d{2}/.*(?:n(?![d{2}/).*)+', text), see regex demo.

– Wiktor Stribiżew
Nov 26 '18 at 20:43

add a comment |

I'm trying to parse some log file, which each line starts with time stamp, such as:

[11/16/18 16:40:04:097 EST]

If there isn't any error in the log, then every line will have the same starting pattern. However, if some error occurs, then the whole error stack will be printed with the time stamp as following:

[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName 

Additional Data: 

    null

Current exception:

Message:

_ERR_BSAFE_FUNCTION

Stack trace:

What I want to do is extra the whole error stack, for example, the input is:

[11/16/18 16:40:04:098 EST] 000000ae CommandLogger 2   PerfLog <entry operation="Command : com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl" parameters="@releaseID=9.0 

[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName 

Additional Data: 

    null

Current exception:

Message:

_ERR_BSAFE_FUNCTION

Stack trace:

[11/16/18 16:40:04:101 EST] 000000ae SystemErr     R   

[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.

    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)

The ideal out put should be:

[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName 

Additional Data: 

    null

Current exception:

Message:

_ERR_BSAFE_FUNCTION

Stack trace: 

[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.

    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)

Tried the following and failed, if you can let me know what's wrong with my code, it would be great.

import re, sys



if len(sys.argv) > 1:

    with open(sys.argv[1]) as f:

        text = f.read()

else:

    text = sys.stdin.read()



p_start = r'^[d{2}/.*'

p_end = r'^[d{2}/.*'





pattern = r'{p0}(?!.*{p0})(?:.*?{p1}|.*)'.format(p0=p_start, p1=p_end)



error_no_match = 'No Match'



matches = re.findall(pattern, text, flags=re.M|re.DOTALL)



if matches:

    for match in matches:

        print 'match:', match

    print len(matches)

else:

    print error_no_match

asked Nov 26 '18 at 20:21

Ian Zhang

919

You seem to need re.findall(r'(?m)^[d{2}/.*(?:n(?![d{2}/).*)+', text), see regex demo.

– Wiktor Stribiżew
Nov 26 '18 at 20:43

add a comment |

I'm trying to parse some log file, which each line starts with time stamp, such as:

[11/16/18 16:40:04:097 EST]

If there isn't any error in the log, then every line will have the same starting pattern. However, if some error occurs, then the whole error stack will be printed with the time stamp as following:

[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName 

Additional Data: 

    null

Current exception:

Message:

_ERR_BSAFE_FUNCTION

Stack trace:

What I want to do is extra the whole error stack, for example, the input is:

[11/16/18 16:40:04:098 EST] 000000ae CommandLogger 2   PerfLog <entry operation="Command : com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl" parameters="@releaseID=9.0 

[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName 

Additional Data: 

    null

Current exception:

Message:

_ERR_BSAFE_FUNCTION

Stack trace:

[11/16/18 16:40:04:101 EST] 000000ae SystemErr     R   

[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.

    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)

The ideal out put should be:

[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName 

Additional Data: 

    null

Current exception:

Message:

_ERR_BSAFE_FUNCTION

Stack trace: 

[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.

    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)

Tried the following and failed, if you can let me know what's wrong with my code, it would be great.

import re, sys



if len(sys.argv) > 1:

    with open(sys.argv[1]) as f:

        text = f.read()

else:

    text = sys.stdin.read()



p_start = r'^[d{2}/.*'

p_end = r'^[d{2}/.*'





pattern = r'{p0}(?!.*{p0})(?:.*?{p1}|.*)'.format(p0=p_start, p1=p_end)



error_no_match = 'No Match'



matches = re.findall(pattern, text, flags=re.M|re.DOTALL)



if matches:

    for match in matches:

        print 'match:', match

    print len(matches)

else:

    print error_no_match

asked Nov 26 '18 at 20:21

Ian Zhang

919

I'm trying to parse some log file, which each line starts with time stamp, such as:

[11/16/18 16:40:04:097 EST]

If there isn't any error in the log, then every line will have the same starting pattern. However, if some error occurs, then the whole error stack will be printed with the time stamp as following:

[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName 

Additional Data: 

    null

Current exception:

Message:

_ERR_BSAFE_FUNCTION

Stack trace:

What I want to do is extra the whole error stack, for example, the input is:

[11/16/18 16:40:04:098 EST] 000000ae CommandLogger 2   PerfLog <entry operation="Command : com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl" parameters="@releaseID=9.0 

[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName 

Additional Data: 

    null

Current exception:

Message:

_ERR_BSAFE_FUNCTION

Stack trace:

[11/16/18 16:40:04:101 EST] 000000ae SystemErr     R   

[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.

    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)

The ideal out put should be:

[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName 

Additional Data: 

    null

Current exception:

Message:

_ERR_BSAFE_FUNCTION

Stack trace: 

[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.

    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)

Tried the following and failed, if you can let me know what's wrong with my code, it would be great.

import re, sys



if len(sys.argv) > 1:

    with open(sys.argv[1]) as f:

        text = f.read()

else:

    text = sys.stdin.read()



p_start = r'^[d{2}/.*'

p_end = r'^[d{2}/.*'





pattern = r'{p0}(?!.*{p0})(?:.*?{p1}|.*)'.format(p0=p_start, p1=p_end)



error_no_match = 'No Match'



matches = re.findall(pattern, text, flags=re.M|re.DOTALL)



if matches:

    for match in matches:

        print 'match:', match

    print len(matches)

else:

    print error_no_match

python regex

asked Nov 26 '18 at 20:21

Ian Zhang

919

asked Nov 26 '18 at 20:21

Ian Zhang

919

asked Nov 26 '18 at 20:21

Ian Zhang

919

asked Nov 26 '18 at 20:21

Ian Zhang

919

asked Nov 26 '18 at 20:21

Ian Zhang

919

You seem to need re.findall(r'(?m)^[d{2}/.*(?:n(?![d{2}/).*)+', text), see regex demo.

– Wiktor Stribiżew
Nov 26 '18 at 20:43

add a comment |

You seem to need re.findall(r'(?m)^[d{2}/.*(?:n(?![d{2}/).*)+', text), see regex demo.

– Wiktor Stribiżew
Nov 26 '18 at 20:43

You seem to need re.findall(r'(?m)^[d{2}/.*(?:n(?![d{2}/).*)+', text), see regex demo.

– Wiktor Stribiżew
Nov 26 '18 at 20:43

add a comment |

1 Answer
1

active

oldest

votes

As you read the whole file into a variable text, you may use

matches = re.findall(r'^[d{2}/.*(?:n(?![d{2}/).*)+', text, re.M)

See regex demo. Note that in case your text contains CRLF endings, you need to replace n with r?n (where CR is optional).

Details

re.M modifier makes ^ match at the start of a line

^ - start of a line

[ - a [ char

d{2}/ - 2 digits and a / char

.* - the rest of the line

(?:n(?![d{2}/).*)+ - one or more repetitions of
- n(?![d{2}/) - an LF symbol (use r?n if there can be CRLF endings) that is not followed with [ and two digits and /

.* - the rest of the line.

Python demo:

import re

rx = r"^[d{2}/.*(?:n(?![d{2}/).*)+"

text = "[11/16/18 16:40:04:098 EST] 000000ae CommandLogger 2   PerfLog <entry operation="Command : com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl" parameters="@releaseID=9.0 n[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName nAdditional Data: n    nullnCurrent exception:nMessage:n_ERR_BSAFE_FUNCTIONnStack trace:n[11/16/18 16:40:04:101 EST] 000000ae SystemErr     R   n[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.n    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)"

matches = re.findall(rx, text, re.M)

print(matches)

Output:

[

  '[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName nAdditional Data: n    nullnCurrent exception:nMessage:n_ERR_BSAFE_FUNCTIONnStack trace:', 

  '[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.n    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)'

]

edited Nov 26 '18 at 20:55

answered Nov 26 '18 at 20:46

Wiktor Stribiżew

330k16149229

1

Thanks for your help, Wiktor. I had hard time to figure out .*(?:n(?![d{2}/).*)+' by myself... do you have any idea, where did I got wrong...

– Ian Zhang
Nov 26 '18 at 20:55

@IanZhang It is because you tried to match something in between while here it is easier to get all consecutive lines that do not start with a certain pattern, and + quantifier at the end is very important.

– Wiktor Stribiżew
Nov 26 '18 at 20:56

In .*(?:n(?![d{2}/).*)+', the [ is not escaped. You do not match the starting pattern either, although that is of minor importance.

– Wiktor Stribiżew
Nov 26 '18 at 20:59

thanks, also, for +, it's aginst .*(?:n(?![d{2}/).*) or the the whole patter ^[d{2}/.*(?:n(?![d{2}/).*)? In addition, got confused by ?: can you please explain this a bit?

– Ian Zhang
Nov 26 '18 at 21:04

@IanZhang (?:...) is a non-capturing group, only meant to group a number of patterns into a sequence of patterns that you may quantify or use several alternatives. Last + in my pattern makes sure the regex only matches multiline entries.

– Wiktor Stribiżew
Nov 26 '18 at 21:17

|
show 1 more comment

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1 Answer
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1 Answer
1

active

oldest

votes

As you read the whole file into a variable text, you may use

matches = re.findall(r'^[d{2}/.*(?:n(?![d{2}/).*)+', text, re.M)

See regex demo. Note that in case your text contains CRLF endings, you need to replace n with r?n (where CR is optional).

Details

re.M modifier makes ^ match at the start of a line

^ - start of a line

[ - a [ char

d{2}/ - 2 digits and a / char

.* - the rest of the line

(?:n(?![d{2}/).*)+ - one or more repetitions of
- n(?![d{2}/) - an LF symbol (use r?n if there can be CRLF endings) that is not followed with [ and two digits and /

.* - the rest of the line.

Python demo:

import re

rx = r"^[d{2}/.*(?:n(?![d{2}/).*)+"

text = "[11/16/18 16:40:04:098 EST] 000000ae CommandLogger 2   PerfLog <entry operation="Command : com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl" parameters="@releaseID=9.0 n[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName nAdditional Data: n    nullnCurrent exception:nMessage:n_ERR_BSAFE_FUNCTIONnStack trace:n[11/16/18 16:40:04:101 EST] 000000ae SystemErr     R   n[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.n    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)"

matches = re.findall(rx, text, re.M)

print(matches)

Output:

[

  '[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName nAdditional Data: n    nullnCurrent exception:nMessage:n_ERR_BSAFE_FUNCTIONnStack trace:', 

  '[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.n    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)'

]

edited Nov 26 '18 at 20:55

answered Nov 26 '18 at 20:46

Wiktor Stribiżew

330k16149229

1

Thanks for your help, Wiktor. I had hard time to figure out .*(?:n(?![d{2}/).*)+' by myself... do you have any idea, where did I got wrong...

– Ian Zhang
Nov 26 '18 at 20:55

@IanZhang It is because you tried to match something in between while here it is easier to get all consecutive lines that do not start with a certain pattern, and + quantifier at the end is very important.

– Wiktor Stribiżew
Nov 26 '18 at 20:56

In .*(?:n(?![d{2}/).*)+', the [ is not escaped. You do not match the starting pattern either, although that is of minor importance.

– Wiktor Stribiżew
Nov 26 '18 at 20:59

thanks, also, for +, it's aginst .*(?:n(?![d{2}/).*) or the the whole patter ^[d{2}/.*(?:n(?![d{2}/).*)? In addition, got confused by ?: can you please explain this a bit?

– Ian Zhang
Nov 26 '18 at 21:04

@IanZhang (?:...) is a non-capturing group, only meant to group a number of patterns into a sequence of patterns that you may quantify or use several alternatives. Last + in my pattern makes sure the regex only matches multiline entries.

– Wiktor Stribiżew
Nov 26 '18 at 21:17

|
show 1 more comment

As you read the whole file into a variable text, you may use

matches = re.findall(r'^[d{2}/.*(?:n(?![d{2}/).*)+', text, re.M)

See regex demo. Note that in case your text contains CRLF endings, you need to replace n with r?n (where CR is optional).

Details

re.M modifier makes ^ match at the start of a line

^ - start of a line

[ - a [ char

d{2}/ - 2 digits and a / char

.* - the rest of the line

(?:n(?![d{2}/).*)+ - one or more repetitions of
- n(?![d{2}/) - an LF symbol (use r?n if there can be CRLF endings) that is not followed with [ and two digits and /

.* - the rest of the line.

Python demo:

import re

rx = r"^[d{2}/.*(?:n(?![d{2}/).*)+"

text = "[11/16/18 16:40:04:098 EST] 000000ae CommandLogger 2   PerfLog <entry operation="Command : com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl" parameters="@releaseID=9.0 n[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName nAdditional Data: n    nullnCurrent exception:nMessage:n_ERR_BSAFE_FUNCTIONnStack trace:n[11/16/18 16:40:04:101 EST] 000000ae SystemErr     R   n[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.n    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)"

matches = re.findall(rx, text, re.M)

print(matches)

Output:

[

  '[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName nAdditional Data: n    nullnCurrent exception:nMessage:n_ERR_BSAFE_FUNCTIONnStack trace:', 

  '[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.n    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)'

]

edited Nov 26 '18 at 20:55

answered Nov 26 '18 at 20:46

Wiktor Stribiżew

330k16149229

1

Thanks for your help, Wiktor. I had hard time to figure out .*(?:n(?![d{2}/).*)+' by myself... do you have any idea, where did I got wrong...

– Ian Zhang
Nov 26 '18 at 20:55

@IanZhang It is because you tried to match something in between while here it is easier to get all consecutive lines that do not start with a certain pattern, and + quantifier at the end is very important.

– Wiktor Stribiżew
Nov 26 '18 at 20:56

In .*(?:n(?![d{2}/).*)+', the [ is not escaped. You do not match the starting pattern either, although that is of minor importance.

– Wiktor Stribiżew
Nov 26 '18 at 20:59

thanks, also, for +, it's aginst .*(?:n(?![d{2}/).*) or the the whole patter ^[d{2}/.*(?:n(?![d{2}/).*)? In addition, got confused by ?: can you please explain this a bit?

– Ian Zhang
Nov 26 '18 at 21:04

@IanZhang (?:...) is a non-capturing group, only meant to group a number of patterns into a sequence of patterns that you may quantify or use several alternatives. Last + in my pattern makes sure the regex only matches multiline entries.

– Wiktor Stribiżew
Nov 26 '18 at 21:17

|
show 1 more comment

As you read the whole file into a variable text, you may use

matches = re.findall(r'^[d{2}/.*(?:n(?![d{2}/).*)+', text, re.M)

See regex demo. Note that in case your text contains CRLF endings, you need to replace n with r?n (where CR is optional).

Details

re.M modifier makes ^ match at the start of a line

^ - start of a line

[ - a [ char

d{2}/ - 2 digits and a / char

.* - the rest of the line

(?:n(?![d{2}/).*)+ - one or more repetitions of
- n(?![d{2}/) - an LF symbol (use r?n if there can be CRLF endings) that is not followed with [ and two digits and /

.* - the rest of the line.

Python demo:

import re

rx = r"^[d{2}/.*(?:n(?![d{2}/).*)+"

text = "[11/16/18 16:40:04:098 EST] 000000ae CommandLogger 2   PerfLog <entry operation="Command : com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl" parameters="@releaseID=9.0 n[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName nAdditional Data: n    nullnCurrent exception:nMessage:n_ERR_BSAFE_FUNCTIONnStack trace:n[11/16/18 16:40:04:101 EST] 000000ae SystemErr     R   n[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.n    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)"

matches = re.findall(rx, text, re.M)

print(matches)

Output:

[

  '[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName nAdditional Data: n    nullnCurrent exception:nMessage:n_ERR_BSAFE_FUNCTIONnStack trace:', 

  '[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.n    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)'

]

edited Nov 26 '18 at 20:55

answered Nov 26 '18 at 20:46

Wiktor Stribiżew

330k16149229

As you read the whole file into a variable text, you may use

matches = re.findall(r'^[d{2}/.*(?:n(?![d{2}/).*)+', text, re.M)

See regex demo. Note that in case your text contains CRLF endings, you need to replace n with r?n (where CR is optional).

Details

re.M modifier makes ^ match at the start of a line

^ - start of a line

[ - a [ char

d{2}/ - 2 digits and a / char

.* - the rest of the line

(?:n(?![d{2}/).*)+ - one or more repetitions of
- n(?![d{2}/) - an LF symbol (use r?n if there can be CRLF endings) that is not followed with [ and two digits and /

.* - the rest of the line.

Python demo:

import re

rx = r"^[d{2}/.*(?:n(?![d{2}/).*)+"

text = "[11/16/18 16:40:04:098 EST] 000000ae CommandLogger 2   PerfLog <entry operation="Command : com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl" parameters="@releaseID=9.0 n[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName nAdditional Data: n    nullnCurrent exception:nMessage:n_ERR_BSAFE_FUNCTIONnStack trace:n[11/16/18 16:40:04:101 EST] 000000ae SystemErr     R   n[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.n    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)"

matches = re.findall(rx, text, re.M)

print(matches)

Output:

[

  '[11/16/18 16:40:04:100 EST] 000000ae CommerceSrvr  E MessagingViewCommandImpl nonHttpForwardDocument(String,String) CMN8014E: The URL constructed during composition using ViewName nAdditional Data: n    nullnCurrent exception:nMessage:n_ERR_BSAFE_FUNCTIONnStack trace:', 

  '[11/16/18 16:40:04:102 EST] 000000ae SystemErr     R   com.ibm.commerce.exception.ECSystemException: The URL constructed during composition using ViewName http://localhost:80/webapp/wcs/stores/IBM.WC.Compose/webservices/OAGIS/9.0/BODs/AcknowledgePaymentInstruction.jsp/******** is invalid {1}.n    at com.ibm.commerce.messaging.viewcommands.MessagingViewCommandImpl.nonHttpForwardDocument(MessagingViewCommandImpl.java:581)'

]

edited Nov 26 '18 at 20:55

answered Nov 26 '18 at 20:46

Wiktor Stribiżew

330k16149229

edited Nov 26 '18 at 20:55

answered Nov 26 '18 at 20:46

Wiktor Stribiżew

330k16149229

answered Nov 26 '18 at 20:46

Wiktor Stribiżew

330k16149229

answered Nov 26 '18 at 20:46

Wiktor Stribiżew

330k16149229

1

Thanks for your help, Wiktor. I had hard time to figure out .*(?:n(?![d{2}/).*)+' by myself... do you have any idea, where did I got wrong...

– Ian Zhang
Nov 26 '18 at 20:55

@IanZhang It is because you tried to match something in between while here it is easier to get all consecutive lines that do not start with a certain pattern, and + quantifier at the end is very important.

– Wiktor Stribiżew
Nov 26 '18 at 20:56

In .*(?:n(?![d{2}/).*)+', the [ is not escaped. You do not match the starting pattern either, although that is of minor importance.

– Wiktor Stribiżew
Nov 26 '18 at 20:59

thanks, also, for +, it's aginst .*(?:n(?![d{2}/).*) or the the whole patter ^[d{2}/.*(?:n(?![d{2}/).*)? In addition, got confused by ?: can you please explain this a bit?

– Ian Zhang
Nov 26 '18 at 21:04

@IanZhang (?:...) is a non-capturing group, only meant to group a number of patterns into a sequence of patterns that you may quantify or use several alternatives. Last + in my pattern makes sure the regex only matches multiline entries.

– Wiktor Stribiżew
Nov 26 '18 at 21:17

|
show 1 more comment

1

Thanks for your help, Wiktor. I had hard time to figure out .*(?:n(?![d{2}/).*)+' by myself... do you have any idea, where did I got wrong...

– Ian Zhang
Nov 26 '18 at 20:55

@IanZhang It is because you tried to match something in between while here it is easier to get all consecutive lines that do not start with a certain pattern, and + quantifier at the end is very important.

– Wiktor Stribiżew
Nov 26 '18 at 20:56

In .*(?:n(?![d{2}/).*)+', the [ is not escaped. You do not match the starting pattern either, although that is of minor importance.

– Wiktor Stribiżew
Nov 26 '18 at 20:59

thanks, also, for +, it's aginst .*(?:n(?![d{2}/).*) or the the whole patter ^[d{2}/.*(?:n(?![d{2}/).*)? In addition, got confused by ?: can you please explain this a bit?

– Ian Zhang
Nov 26 '18 at 21:04

@IanZhang (?:...) is a non-capturing group, only meant to group a number of patterns into a sequence of patterns that you may quantify or use several alternatives. Last + in my pattern makes sure the regex only matches multiline entries.

– Wiktor Stribiżew
Nov 26 '18 at 21:17

Thanks for your help, Wiktor. I had hard time to figure out .*(?:n(?![d{2}/).*)+' by myself... do you have any idea, where did I got wrong...

– Ian Zhang
Nov 26 '18 at 20:55

@IanZhang It is because you tried to match something in between while here it is easier to get all consecutive lines that do not start with a certain pattern, and + quantifier at the end is very important.

– Wiktor Stribiżew
Nov 26 '18 at 20:56

In .*(?:n(?![d{2}/).*)+', the [ is not escaped. You do not match the starting pattern either, although that is of minor importance.

– Wiktor Stribiżew
Nov 26 '18 at 20:59

thanks, also, for +, it's aginst .*(?:n(?![d{2}/).*) or the the whole patter ^[d{2}/.*(?:n(?![d{2}/).*)? In addition, got confused by ?: can you please explain this a bit?

– Ian Zhang
Nov 26 '18 at 21:04

@IanZhang (?:...) is a non-capturing group, only meant to group a number of patterns into a sequence of patterns that you may quantify or use several alternatives. Last + in my pattern makes sure the regex only matches multiline entries.

– Wiktor Stribiżew
Nov 26 '18 at 21:17

|
show 1 more comment

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