[libboost_regex-1_32.dylib] Validating Email address using Regx failing in boost
Hi All, I am using boost regex libraries (libboost_regex-1_32.dylib) for validation of strings. The regular expression string i use is as below. string expr = "^((?>[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+\\x20*|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\"\\x20*)*(?<angle><))?((?!\\.)(?>\\.?[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+)+|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\")@(((?!-)[a-zA-Z\\d\\-]+(?<!-)\\.)+[a-zA-Z]{2,}|\\[(((?(?<!\\[)\\.)(25[0-5]|2[0-4]\\d|[01]?\\d?\\d)){4}|[a-zA-Z\\d\\-]*[a-zA-Z\\d]:((?=[\\x01-\\x7f])[^\\\\\\[\\]]|\\\\[\\x01-\\x7f])+)\\])(?(angle)>)$"; When i make a call boost::regex regExpr(expr); it is throwing what(): Invalid preceding regular expression. I got the regular expression from http://regexlib.com/REDetails.aspx?regexp_id=711 and converted into std::string. If i print the string onto a terminal, the string exactly matches with the regular expression ^((?>[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?(angle)>)$ I am not able to find why boost is telling the string as invalid regular expression. I work in Mac OS X Leopard, and use boost_1_32. Any ideas? Thanks Arun Reply Forward New window Print all « Back to Sent Mail Archive Report spam Delete Move to Inbox Labels More actions 1 of 598 Older › Use free POP access to download your messages to Outlook or devices that support POP. Learn more You are currently using 1306 MB (17%) of your 7382 MB. Last account activity: 9 minutes ago at this IP (125.16.133.35). Details Gmail view: standard | turn off chat | older version | basic HTML Learn more ©2009 Google - Terms - Privacy Policy - Google Home
I am using boost regex libraries (libboost_regex-1_32.dylib) for validation of strings. The regular expression string i use is as below.
string expr = "^((?>[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+\\x20*|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\"\\x20*)*(?<angle><))?((?!\\.)(?>\\.?[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+)+|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\")@(((?!-)[a-zA-Z\\d\\-]+(?<!-)\\.)+[a-zA-Z]{2,}|\\[(((?(?<!\\[)\\.)(25[0-5]|2[0-4]\\d|[01]?\\d?\\d)){4}|[a-zA-Z\\d\\-]*[a-zA-Z\\d]:((?=[\\x01-\\x7f])[^\\\\\\[\\]]|\\\\[\\x01-\\x7f])+)\\])(?(angle)>)$";
When i make a call
boost::regex regExpr(expr);
it is throwing what(): Invalid preceding regular expression.
Sigh... I *really* need to improve those error messages :-( I tried the expression in Perl and got an error as well: $in = 'name.surname@blah.com'; $in =~ /^((?>[a-zA-Z\d!#$%&'*+\-\/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#$%&'*+\-\/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?(angle)>)$/; print "\n"; print "\$& = $&\n"; print "\$1 = $1\n"; print "\$2 = $2\n"; print "\$3 = $3\n"; print "\$4 = $4\n"; print "\$5 = $5\n"; print "\$6 = $6\n"; print "\$7 = $7\n"; print "\$8 = $8\n"; Prints: Unknown switch condition (?(an in regex; marked by <-- HERE in m/^((?>[a-zA-Z\d!#0&'*+\-/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#0&'*+\-/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?( <-- HERE angle)>)$/ at test.pl line 3. So Perl and Boost.Regex are both rejecting the "(?(angle)>)" part, and looking at http://perldoc.perl.org/perlre.html I believe it should be rejected. It appears this is a .NET-specific construct :-( Changing to "(?(<angle>)>)" seems to make everything work though, in code: boost::regex test ( "^((?>[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+\\x20*|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\"\\x20*)*(?<angle><))?((?!\\.)(?>\\.?[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+)+|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\")@(((?!-)[a-zA-Z\\d\\-]+(?<!-)\\.)+[a-zA-Z]{2,}|\\[(((?(?<!\\[)\\.)(25[0-5]|2[0-4]\\d|[01]?\\d?\\d)){4}|[a-zA-Z\\d\\-]*[a-zA-Z\\d]:((?=[\\x01-\\x7f])[^\\\\\\[\\]]|\\\\[\\x01-\\x7f])+)\\])(?(<angle>)>)$" ); HTH, John.
Hi John, Thanks for u r reply. I am using the code as below. bool testRegExMatch(std::string aRegex, std::string aTestString) { boost::regex regExpr(aRegex); if(regex_match(aTestString,regExpr)==false) { return false; } return true; } bool validateEmailAddressWithRegx(std::string aEmailAddressStr) { std::string expr("^((?>[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+\\x20*|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\"\\x20*)*(?<angle><))?((?!\\.)(?>\\.?[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+)+|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\")@(((?!-)[a-zA-Z\\d\\-]+(?<!-)\\.)+[a-zA-Z]{2,}|\\[(((?(?<!\\[)\\.)(25[0-5]|2[0-4]\\d|[01]?\\d?\\d)){4}|[a-zA-Z\\d\\-]*[a-zA-Z\\d]:((?=[\\x01-\\x7f])[^\\\\\\[\\]]|\\\\[\\x01-\\x7f])+)\\])(?(<angle>)>)$"); cout<<expr; return testRegExMatch(expr, aEmailAddressStr); } ^((?>[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?(<angle>)>)$ [Session started at 2009-10-22 22:02:58 +0530.] terminate called after throwing an instance of 'boost::bad_expression' what(): Invalid preceding regular expression Any thing i am missing -Arun But still i am getting the output as On Thu, Oct 22, 2009 at 9:35 PM, John Maddock <john@johnmaddock.co.uk> wrote:
I am using boost regex libraries (libboost_regex-1_32.dylib) for validation of strings. The regular expression string i use is as below.
string expr = "^((?>[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+\\x20*|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\"\\x20*)*(?<angle><))?((?!\\.)(?>\\.?[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+)+|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\")@(((?!-)[a-zA-Z\\d\\-]+(?<!-)\\.)+[a-zA-Z]{2,}|\\[(((?(?<!\\[)\\.)(25[0-5]|2[0-4]\\d|[01]?\\d?\\d)){4}|[a-zA-Z\\d\\-]*[a-zA-Z\\d]:((?=[\\x01-\\x7f])[^\\\\\\[\\]]|\\\\[\\x01-\\x7f])+)\\])(?(angle)>)$";
When i make a call
boost::regex regExpr(expr);
it is throwing what(): Invalid preceding regular expression.
Sigh... I *really* need to improve those error messages :-(
I tried the expression in Perl and got an error as well:
$in = 'name.surname@blah.com'; $in =~ /^((?>[a-zA-Z\d!#$%&'*+\-\/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#$%&'*+\-\/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?(angle)>)$/; print "\n"; print "\$& = $&\n"; print "\$1 = $1\n"; print "\$2 = $2\n"; print "\$3 = $3\n"; print "\$4 = $4\n"; print "\$5 = $5\n"; print "\$6 = $6\n"; print "\$7 = $7\n"; print "\$8 = $8\n";
Prints:
Unknown switch condition (?(an in regex; marked by <-- HERE in m/^((?>[a-zA-Z\d!#0&'*+\-/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#0&'*+\-/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?( <-- HERE angle)>)$/ at test.pl line 3.
So Perl and Boost.Regex are both rejecting the "(?(angle)>)" part, and looking at http://perldoc.perl.org/perlre.html I believe it should be rejected. It appears this is a .NET-specific construct :-(
Changing to "(?(<angle>)>)" seems to make everything work though, in code:
boost::regex test ( "^((?>[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+\\x20*|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\"\\x20*)*(?<angle><))?((?!\\.)(?>\\.?[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+)+|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\")@(((?!-)[a-zA-Z\\d\\-]+(?<!-)\\.)+[a-zA-Z]{2,}|\\[(((?(?<!\\[)\\.)(25[0-5]|2[0-4]\\d|[01]?\\d?\\d)){4}|[a-zA-Z\\d\\-]*[a-zA-Z\\d]:((?=[\\x01-\\x7f])[^\\\\\\[\\]]|\\\\[\\x01-\\x7f])+)\\])(?(<angle>)>)$" );
HTH, John. _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
Also i have tried the perl code that is being posted in this thread. The output seems comes like this perl test.pl Sequence (?<a...) not recognized in regex; marked by <-- HERE in m/^((?>[a-zA-Z\d!#0&'*+\-/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<a <-- HERE ngle><))?((?!\.)(?>\.?[a-zA-Z\d!#0&'*+\-/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?(angle)>)$/ at test.pl line 2. John, if I compare the output to yours, looks like for me the error is being pointed at the 1st instance of "angle" rather than the second one. Is it possible because we may be sing different Operating Systems? I am using Mac OS X 10.5.5 and perl -v This is perl, v5.8.8 built for darwin-thread-multi-2level (with 1 registered patch, see perl -V for more detail) -Arun On Thu, Oct 22, 2009 at 10:08 PM, Arun <arun.ka@gmail.com> wrote:
Hi John, Thanks for u r reply.
I am using the code as below.
bool testRegExMatch(std::string aRegex, std::string aTestString) { boost::regex regExpr(aRegex);
if(regex_match(aTestString,regExpr)==false) { return false; }
return true; }
bool validateEmailAddressWithRegx(std::string aEmailAddressStr) { std::string expr("^((?>[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+\\x20*|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\"\\x20*)*(?<angle><))?((?!\\.)(?>\\.?[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+)+|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\")@(((?!-)[a-zA-Z\\d\\-]+(?<!-)\\.)+[a-zA-Z]{2,}|\\[(((?(?<!\\[)\\.)(25[0-5]|2[0-4]\\d|[01]?\\d?\\d)){4}|[a-zA-Z\\d\\-]*[a-zA-Z\\d]:((?=[\\x01-\\x7f])[^\\\\\\[\\]]|\\\\[\\x01-\\x7f])+)\\])(?(<angle>)>)$");
cout<<expr;
return testRegExMatch(expr, aEmailAddressStr); }
^((?>[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?(<angle>)>)$ [Session started at 2009-10-22 22:02:58 +0530.] terminate called after throwing an instance of 'boost::bad_expression' what(): Invalid preceding regular expression
Any thing i am missing
-Arun
But still i am getting the output as
On Thu, Oct 22, 2009 at 9:35 PM, John Maddock <john@johnmaddock.co.uk> wrote:
I am using boost regex libraries (libboost_regex-1_32.dylib) for validation of strings. The regular expression string i use is as below.
string expr = "^((?>[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+\\x20*|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\"\\x20*)*(?<angle><))?((?!\\.)(?>\\.?[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+)+|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\")@(((?!-)[a-zA-Z\\d\\-]+(?<!-)\\.)+[a-zA-Z]{2,}|\\[(((?(?<!\\[)\\.)(25[0-5]|2[0-4]\\d|[01]?\\d?\\d)){4}|[a-zA-Z\\d\\-]*[a-zA-Z\\d]:((?=[\\x01-\\x7f])[^\\\\\\[\\]]|\\\\[\\x01-\\x7f])+)\\])(?(angle)>)$";
When i make a call
boost::regex regExpr(expr);
it is throwing what(): Invalid preceding regular expression.
Sigh... I *really* need to improve those error messages :-(
I tried the expression in Perl and got an error as well:
$in = 'name.surname@blah.com'; $in =~ /^((?>[a-zA-Z\d!#$%&'*+\-\/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#$%&'*+\-\/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?(angle)>)$/; print "\n"; print "\$& = $&\n"; print "\$1 = $1\n"; print "\$2 = $2\n"; print "\$3 = $3\n"; print "\$4 = $4\n"; print "\$5 = $5\n"; print "\$6 = $6\n"; print "\$7 = $7\n"; print "\$8 = $8\n";
Prints:
Unknown switch condition (?(an in regex; marked by <-- HERE in m/^((?>[a-zA-Z\d!#0&'*+\-/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#0&'*+\-/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?( <-- HERE angle)>)$/ at test.pl line 3.
So Perl and Boost.Regex are both rejecting the "(?(angle)>)" part, and looking at http://perldoc.perl.org/perlre.html I believe it should be rejected. It appears this is a .NET-specific construct :-(
Changing to "(?(<angle>)>)" seems to make everything work though, in code:
boost::regex test ( "^((?>[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+\\x20*|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\"\\x20*)*(?<angle><))?((?!\\.)(?>\\.?[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+)+|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\")@(((?!-)[a-zA-Z\\d\\-]+(?<!-)\\.)+[a-zA-Z]{2,}|\\[(((?(?<!\\[)\\.)(25[0-5]|2[0-4]\\d|[01]?\\d?\\d)){4}|[a-zA-Z\\d\\-]*[a-zA-Z\\d]:((?=[\\x01-\\x7f])[^\\\\\\[\\]]|\\\\[\\x01-\\x7f])+)\\])(?(<angle>)>)$" );
HTH, John. _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
On Thu, Oct 22, 2009 at 1:03 PM, Arun <arun.ka@gmail.com> wrote:
Also i have tried the perl code that is being posted in this thread. The output seems comes like this
perl test.pl Sequence (?<a...) not recognized in regex; marked by <-- HERE in m/^((?>[a-zA-Z\d!#0&'*+\-/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<a <-- HERE ngle><))?((?!\.)(?>\.?[a-zA-Z\d!#0&'*+\-/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?(angle)>)$/ at test.pl line 2.
John, if I compare the output to yours, looks like for me the error is being pointed at the 1st instance of "angle" rather than the second one.
Is it possible because we may be sing different Operating Systems?
I am using Mac OS X 10.5.5 and
perl -v
This is perl, v5.8.8 built for darwin-thread-multi-2level (with 1 registered patch, see perl -V for more detail)
-Arun
On Thu, Oct 22, 2009 at 10:08 PM, Arun <arun.ka@gmail.com> wrote:
Hi John, Thanks for u r reply.
I am using the code as below.
bool testRegExMatch(std::string aRegex, std::string aTestString) { boost::regex regExpr(aRegex);
if(regex_match(aTestString,regExpr)==false) { return false; }
return true; }
bool validateEmailAddressWithRegx(std::string aEmailAddressStr) { std::string expr("^((?>[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+\\x20*|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\"\\x20*)*(?<angle><))?((?!\\.)(?>\\.?[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+)+|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\")@(((?!-)[a-zA-Z\\d\\-]+(?<!-)\\.)+[a-zA-Z]{2,}|\\[(((?(?<!\\[)\\.)(25[0-5]|2[0-4]\\d|[01]?\\d?\\d)){4}|[a-zA-Z\\d\\-]*[a-zA-Z\\d]:((?=[\\x01-\\x7f])[^\\\\\\[\\]]|\\\\[\\x01-\\x7f])+)\\])(?(<angle>)>)$");
cout<<expr;
return testRegExMatch(expr, aEmailAddressStr); }
^((?>[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#$%&'*+\-/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?(<angle>)>)$ [Session started at 2009-10-22 22:02:58 +0530.] terminate called after throwing an instance of 'boost::bad_expression' what(): Invalid preceding regular expression
Any thing i am missing
-Arun
But still i am getting the output as
On Thu, Oct 22, 2009 at 9:35 PM, John Maddock <john@johnmaddock.co.uk> wrote:
I am using boost regex libraries (libboost_regex-1_32.dylib) for validation of strings. The regular expression string i use is as below.
string expr = "^((?>[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+\\x20*|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\"\\x20*)*(?<angle><))?((?!\\.)(?>\\.?[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+)+|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\")@(((?!-)[a-zA-Z\\d\\-]+(?<!-)\\.)+[a-zA-Z]{2,}|\\[(((?(?<!\\[)\\.)(25[0-5]|2[0-4]\\d|[01]?\\d?\\d)){4}|[a-zA-Z\\d\\-]*[a-zA-Z\\d]:((?=[\\x01-\\x7f])[^\\\\\\[\\]]|\\\\[\\x01-\\x7f])+)\\])(?(angle)>)$";
When i make a call
boost::regex regExpr(expr);
it is throwing what(): Invalid preceding regular expression.
Sigh... I *really* need to improve those error messages :-(
I tried the expression in Perl and got an error as well:
$in = 'name.surname@blah.com'; $in =~ /^((?>[a-zA-Z\d!#$%&'*+\-\/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#$%&'*+\-\/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?(angle)>)$/; print "\n"; print "\$& = $&\n"; print "\$1 = $1\n"; print "\$2 = $2\n"; print "\$3 = $3\n"; print "\$4 = $4\n"; print "\$5 = $5\n"; print "\$6 = $6\n"; print "\$7 = $7\n"; print "\$8 = $8\n";
Prints:
Unknown switch condition (?(an in regex; marked by <-- HERE in m/^((?>[a-zA-Z\d!#0&'*+\-/=?^_`{|}~]+\x20*|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*"\x20*)*(?<angle><))?((?!\.)(?>\.?[a-zA-Z\d!#0&'*+\-/=?^_`{|}~]+)+|"((?=[\x01-\x7f])[^"\\]|\\[\x01-\x7f])*")@(((?!-)[a-zA-Z\d\-]+(?<!-)\.)+[a-zA-Z]{2,}|\[(((?(?<!\[)\.)(25[0-5]|2[0-4]\d|[01]?\d?\d)){4}|[a-zA-Z\d\-]*[a-zA-Z\d]:((?=[\x01-\x7f])[^\\\[\]]|\\[\x01-\x7f])+)\])(?( <-- HERE angle)>)$/ at test.pl line 3.
So Perl and Boost.Regex are both rejecting the "(?(angle)>)" part, and looking at http://perldoc.perl.org/perlre.html I believe it should be rejected. It appears this is a .NET-specific construct :-(
Changing to "(?(<angle>)>)" seems to make everything work though, in code:
boost::regex test ( "^((?>[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+\\x20*|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\"\\x20*)*(?<angle><))?((?!\\.)(?>\\.?[a-zA-Z\\d!#$%&'*+\\-/=?^_`{|}~]+)+|\"((?=[\\x01-\\x7f])[^\"\\\\]|\\\\[\\x01-\\x7f])*\")@(((?!-)[a-zA-Z\\d\\-]+(?<!-)\\.)+[a-zA-Z]{2,}|\\[(((?(?<!\\[)\\.)(25[0-5]|2[0-4]\\d|[01]?\\d?\\d)){4}|[a-zA-Z\\d\\-]*[a-zA-Z\\d]:((?=[\\x01-\\x7f])[^\\\\\\[\\]]|\\\\[\\x01-\\x7f])+)\\])(?(<angle>)>)$" );
I thought one of the correct regex's for email (going strict to the standard) is at http://ex-parrot.com/~pdw/Mail-RFC822-Address.html and supports everything except email comments (which would blow that up more then it already is)? And yes, I tried your regex, not even javascript's parser was able to parse it. And what kind of .NET specific crap is that and what is it supposed to do?
I thought one of the correct regex's for email (going strict to the standard) is at http://ex-parrot.com/~pdw/Mail-RFC822-Address.html and supports everything except email comments (which would blow that up more then it already is)?
Please don't over-quote or use the C-word. Many thanks, Moderately yours, John.
John, if I compare the output to yours, looks like for me the error is being pointed at the 1st instance of "angle" rather than the second one.
You need Perl-5.10 or Boost.Regex 1.40 to support that regex. HTH, John.
On Thu, Oct 22, 2009 at 9:03 PM, Arun <arun.ka@gmail.com> wrote:
Also i have tried the perl code that is being posted in this thread. The output seems comes like this
Isn't this kind of email 'validation' a bad idea anyway? Just send an email with a secret and require the secret to be reproduced. Olaf
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Arun -
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Olaf van der Spek -
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