def _compile_pattern( self, pattern ):
"""`pattern` is URL routing pattern.
This method compiles the pattern in three different ways and returns
them as a tuple of (regex, tmpl, redict)
`regex`,
A regular expression string that can be used to match incoming
request-url to resolve view-callable.
`tmpl`,
A template formating string that can be used to generate URLs by
apps.
`redict`,
A dictionary of variable components in path segment and optional
regular expression that must match its value. This can be used for
validation during URL generation.
"""
regex, tmpl, redict = r'^', '', {}
segs = list( filter( None, pattern.split( URLSEP )))
while segs :
regex += URLSEP
tmpl += URLSEP
part = segs.pop(0)
if not part : continue
if part[0] == '*' :
part = URLSEP.join( [part] + segs )
prefx, name, reg, sufx = None, part[1:], r'.*', None
segs = []
else :
prefx, interp, sufx = re_patt.match( part ).groups()
if interp :
try : name, reg = interp[1:-1].split(',', 1)
except : name, reg = interp[1:-1], None
else :
name, reg = None, None
regex += prefx if prefx else r''
if name and reg and sufx :
regex += r'(?P<%s>%s(?=%s))%s' % (name, reg, sufx, sufx)
elif name and reg :
regex += r'(?P<%s>%s)' % (name, reg)
elif name and sufx :
regex += r'(?P<%s>.+(?=%s))%s' % (name, sufx, sufx)
elif name :
regex += r'(?P<%s>.+)' % (name,)
elif sufx :
regex += sufx
tmpl += prefx if prefx else ''
tmpl += '{' + name + '}' if name else ''
tmpl += sufx if sufx else ''
redict[ name ] = reg
regex += '$'
return regex, tmpl, redict
def _compile_pattern( self, pattern ):
"""`pattern` is URL routing pattern.
This method compiles the pattern in three different ways and returns
them as a tuple of (regex, tmpl, redict)
`regex`,
A regular expression string that can be used to match incoming
request-url to resolve view-callable.
`tmpl`,
A template formating string that can be used to generate URLs by
apps.
`redict`,
A dictionary of variable components in path segment and optional
regular expression that must match its value. This can be used for
validation during URL generation.
"""
regex, tmpl, redict = r'^', '', {}
segs = pattern.split( URLSEP )
while segs :
seg = segs.pop(0)
if not seg : continue
regex, tmpl = (regex + URLSEP), (tmpl + URLSEP)
prefx, _, name, reg, sufx = re_patt.match( seg ).groups()
if name[0] == '*' :
rempath = URLSEP.join( [seg] + segs )
prefx, _, name, reg, sufx = re_patt.match( rempath ).groups()
segs = []
reg = reg and reg[1:]
regex += prefx if prefx else r''
if name and reg and sufx :
regex += r'(?P<%s>%s(?=%s))%s' % (name, reg, sufx, sufx)
elif name and reg :
regex += r'(?P<%s>%s)' % (name, reg)
elif name and sufx :
regex += r'(?P<%s>.+(?=%s))%s' % (name, sufx, sufx)
elif name :
regex += r'(?p<%s>.+)' % (name,)
elif sufx :
regex += sufx
tmpl += prefx if prefx else ''
tmpl += '{' + name + '}' if name else ''
tmpl += sufx if sufx else ''
redict[ name ] = reg
regex += '$'
return regex, tmpl, redict