Re^4: extracting a substring from a string

seems like graff was faster again ;)
I did like your approach though!
I'm not quite sure if (in your solution) $binary is known - in my case I'm handling POSTed data, where $length is declared in the data, and $binary just sits between the <file/> tags.
Still; if $length and $binary could be extracted, unpack sounds more logical to me.

Comment on Re^4: extracting a substring from a string - multiple variables

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Re^5: extracting a substring from a string - multiple variables by mwah (Hermit) on Oct 28, 2007 at 08:39 UTC
walinsky: in my case I'm handling POSTed data, where $length is declared in the data, and $binary just sits between the <file/> tags. If thats so you definitely can't use any approach other than blindly extracting a byte sequence of given length (as in Example 2) because the data might at some point contain the sequence `\x00€µ</file>łá>>~` which would break your program otherwise (if you'd use the regex like *`... =~m{<file>.?</file>} ...`**). Regards mwa	[reply] [d/l] [select]

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Re^5: extracting a substring from a string - multiple variables
by mwah (Hermit) on Oct 28, 2007 at 08:39 UTC

walinsky

in my case I'm handling POSTed data, where $length is declared in the data, and $binary just sits between the <file/> tags.

If thats so you *definitely* can't use any approach other than blindly extracting a byte sequence of given length (as in Example 2) because the data *might* at some point contain the sequence \x00€µ</file>łá>>~ which would break your program otherwise (if you'd use the regex like ... =~m{<file>.*?</file>} ...).

Regards

mwa

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