How do you validate a URL with a regular expression in Python

Question

I m building an app on Google App Engine  I m incredibly new to Python and have been beating my head against the following problem for the past 3 days   I have a class to represent an RSS Feed and in this class I have a method called setUrl  Input to this method is a URL    I m trying to use the re python module to validate off of the RFC 3986 Reg-ex  http   www ietf org rfc rfc3986 txt   Below is a snipped which should work    p   re compile                                                              m   p match url  if m    self url   url   return url

User · Answer

urlparse quite happily takes invalid URLs  it is more a string string-splitting library than any kind of validator  For example   from urlparse import urlparse urlparse  http   ----     returns  ParseResult scheme  http   netloc  ----   path     params     query     fragment       Depending on the situation  this might be fine    If you mostly trust the data  and just want to verify the protocol is HTTP  then urlparse is perfect   If you want to make the URL is actually a legal URL  use the ridiculous regex  If you want to make sure it s a real web address   import urllib try      urllib urlopen url  except IOError      print  Not a real URL

User · Answer

I m using the one used by Django and it seems to work pretty well   def is valid url url       import re     regex   re compile          r  https         http    or https            r        A-Z0-9     A-Z0-9-  0 61  A-Z0-9        A-Z  2 6          domain            r localhost      localhost            r  d 1 3    d 1 3    d 1 3    d 1 3         or ip         r      d        optional port         r            S      re IGNORECASE      return url is not None and regex search url    You can always check the latest version here  https   github com django django blob master django core validators py L74

User · Answer

Here s the complete regexp to parse a URL      http                   a-zA-Z d        a-zA-Z d  -   a-zA-Z d             a-zA-Z        a-zA-Z d  -   a-zA-Z d             d           d     3           d                      a-zA-Z d  -                a-fA-F  d  2         amp                    a-zA-Z d  -                a-fA-F d   2         amp                        a-zA-Z d  -                a-fA-F d   2         amp               ftp                   a-zA-Z d  -                 a-fA-F d  2        amp                    a-zA-Z d  -                a- fA-F d  2        amp                           a-zA-Z d        a-zA-Z d  -    a-zA-Z d            a-zA-Z        a-zA-Z d  -   a-zA-Z d              d           d    3           d                       a-zA-Z d  -                 a-fA-F d  2         amp                    a-zA-Z d  -                 a-fA-F d  2         amp             type  AIDaid          news               a-zA-Z d  -                a-fA-F d  2          amp                    a-zA-Z d        a-zA-Z d  -   a-zA-Z d            a-zA-Z         a-zA-Z d  -   a-zA-Z d             d           d    3         a-zA-Z      a-zA-Z d      -             nntp                   a-zA-Z d         a-zA-Z d  -   a-zA-Z d            a-zA-Z        a-zA-Z d  -   a-zA-Z d              d           d    3           d          a-zA-Z     a-zA-Z  d      -            d         telnet                   a-zA-Z d  -                 a-fA-F d  2        amp                    a-zA-Z d  -                 a-fA-F d  2        amp                           a-zA-Z d        a -zA-Z d  -   a-zA-Z d            a-zA-Z        a-zA-Z d  -   a-zA-Z d              d           d    3           d             gopher                    a-zA-Z d        a-zA-Z d  -   a-zA-Z d            a-zA-Z         a-zA-Z d  -   a-zA-Z d             d           d    3           d              a-zA-Z d  -               amp         a-fA-F d  2              a-zA-Z d  -               amp         a-fA-F d  2         09          a-zA -Z d  -                a-fA-F d  2         amp          09       a-zA-Z d   -               amp         a-fA-F d  2                  wais                    a-zA-Z d        a-zA-Z d  -   a-zA-Z d            a-zA-Z         a-zA-Z d  -   a-zA-Z d             d           d    3           d              a-zA-Z d  -                a-fA-F d  2                   a-zA -Z d  -                a-fA-F d  2             a-zA-Z d  -                 a-fA-F d  2                   a-zA-Z d  -                a-fA-F d   2         amp             mailto        a-zA-Z d  -               amp          a-fA-F d  2          file                   a-zA-Z d        a-zA-Z d   -   a-zA-Z d            a-zA-Z        a-zA-Z d  -   a-zA-Z d              d           d    3    localhost                a-zA-Z d  -                 a-fA-F d  2         amp                    a-zA-Z d  -                 a-fA-F d  2         amp              prospero                   a-zA-Z  d        a-zA-Z d  -   a-zA-Z d            a-zA-Z        a-zA-Z d  -    a-zA-Z d             d           d    3           d                    a-zA-Z d  -                a-fA-F d  2         amp                    a- zA-Z d  -                a-fA-F d  2         amp                           a-zA-Z d  -                a-fA-F d  2         amp                a-zA-Z d   -                a-fA-F d  2         amp             ldap                       a-zA-Z d        a-zA-Z d  -   a-zA-Z d            a-zA-Z         a-zA-Z d  -   a-zA-Z d             d           d    3           d                               a-zA-Z d      3 d  46  a-fA-F d   57  Aa d         20       OID oid          d           d             0 Aa       2 0           0 Aa       20            a-zA-Z d  -                a-fA-F  d  2                0 Aa       20            0 Aa       20                    a-zA-Z d      3 d  46  a-fA-F d   57  Aa d        20       OID  oid          d           d             0 Aa       20           0 Aa        20            a-zA-Z d  -                a-fA-F d  2                       0 Aa       20                  0 Aa       20                        a-zA-Z d      3 d  46  a-fA-F d   57  Aa d        20       OID o id          d           d             0 Aa       20           0 Aa        20            a-zA-Z d  -                a-fA-F d  2                 0 Aa       20            0 Aa       20                   a-zA-Z d       3 d  46  a-fA-F d   57  Aa d        20       OID oid          d            d             0 Aa       20           0 Aa       20            a -zA-Z d  -                a-fA-F d  2                     0 Aa       2 0                  0 Aa       20                        a-zA-Z d  -                 a-fA-F d  2                a-zA-Z d  -                a-f A-F d  2                  base one sub              a-zA-Z d  -                amp         a-fA-F d  2                    z39  50 rs                      a-zA-Z d        a-zA-Z d  -   a-zA-Z d            a-zA-Z         a-zA-Z d  -   a-zA-Z d             d           d    3           d                    a-zA-Z d  -                a-fA-F d  2                  a-zA-Z d  -                a-fA-F d  2                   a-zA-Z d  -                 a-fA-F d  2             esn        a-zA-Z d  -                 a-fA-F d  2           rs        a-zA-Z d  -                a-fA -F d  2                 a-zA-Z d  -                a-fA-F d  2                cid           a-zA-Z d  -                a-fA-F d  2          amp            mid           a-zA-Z d  -                a-fA-F d  2           amp                    a-zA-Z d  -                a-fA-F d  2          amp              vemmi                   a-zA-Z d        a-zA-Z d  -   a-zA-Z  d            a-zA-Z        a-zA-Z d  -   a-zA-Z d             d            d    3           d                   a-zA-Z d  -                a -fA-F d  2          amp                       a-zA-Z d  -                a -fA-F d  2          amp                a-zA-Z d  -                a-fA-F d   2          amp               imap                         a-zA-Z d  -                 a-fA-F d  2      amp               Aa  Uu  Tt  Hh                   a-zA-Z d  -                a-fA-F d  2      amp                      Aa  Uu  Tt  Hh                  a-zA-Z d  -                a-fA-F d  2       amp                      a-zA-Z d  -                a-fA-F d  2       amp                              a-zA-Z d        a-zA-Z d  -   a-zA-Z d             a-zA-Z        a-zA-Z d  -   a-zA-Z d             d            d    3           d                          a-zA-Z d  -                 a-fA-F d  2      amp             Tt  Yy  Pp  Ee      Ll     Ii  Ss  Tt    Ss  Uu  Bb                  a-zA-Z d  -                a-fA-F d  2       amp                         a-zA-Z d  -                a-fA-F d  2       amp                    Uu  Ii  Dd  Vv  Aa  Ll  Ii  Dd  Ii  Tt  Yy      1- 9  d                    a-zA-Z d  -                a-fA-F d  2      amp                   Uu  Ii  Dd  Vv  Aa  Ll  Ii  Dd  Ii  Tt  Yy      1-9  d            Uu  Ii  Dd      1-9  d            Ss  Ee  Cc  Tt  Ii  Oo  Nn             a-zA-Z d  -                a-fA-F d  2      amp                       nfs                         a-zA-Z d        a-zA-Z d  -   a-zA- Z d            a-zA-Z        a-zA-Z d  -   a-zA-Z d             d            d    3           d                            a-zA-Z d   -                  a-fA-F d  2       amp                     a-zA-Z d   -                  a-fA-F d  2       amp                                     a-zA-Z d    -                 a-fA-F d  2       amp                     a-zA-Z d    -                 a-fA-F d  2       amp                              a-zA- Z d   -                 a-fA-F d  2       amp                     a-zA-Z d    -                 a-fA-F d  2       amp                 Given its complexibility  I think you should go the urlparse way   For completeness  here s the pseudo-BNF of the above regex  as a documentation      The generic form of a URL is   genericurl       scheme     schemepart    Specific predefined schemes are defined here  new schemes   may be registered with IANA  url              httpurl   ftpurl   newsurl                    nntpurl   telneturl   gopherurl                    waisurl   mailtourl   fileurl                    prosperourl   otherurl    new schemes follow the general syntax otherurl         genericurl    the scheme is in lower case  interpreters should use case-ignore scheme           1   lowalpha   digit          -          schemepart        xchar   ip-schemepart     URL schemeparts for ip based protocols   ip-schemepart         login       urlpath    login              user       password         hostport hostport         host       port   host             hostname   hostnumber hostname            domainlabel       toplabel domainlabel      alphadigit   alphadigit    alphadigit    -    alphadigit toplabel         alpha   alpha    alphadigit    -    alphadigit alphadigit       alpha   digit hostnumber       digits     digits     digits     digits port             digits user                uchar                           password            uchar                           urlpath           xchar      depends on protocol see section 3 1    The predefined schemes     FTP  see also RFC959   ftpurl            ftp     login       fpath     type   ftptype    fpath            fsegment        fsegment   fsegment            uchar                                 ftptype           A     I     D     a     i     d     FILE  fileurl           file       host    localhost        fpath    HTTP  httpurl           http     hostport       hpath       search    hpath            hsegment        hsegment   hsegment            uchar                                 search              uchar                                    GOPHER  see also RFC1436   gopherurl         gopher     hostport       gtype   selector                      09  search     09  gopher  string           gtype            xchar selector          xchar gopher  string    xchar    MAILTO  see also RFC822   mailtourl         mailto   encoded822addr encoded822addr   1 xchar                 further defined in RFC822    NEWS  see also RFC1036   newsurl           news   grouppart grouppart              group   article group            alpha    alpha   digit    -                      article          1   uchar                                           host    NNTP  see also RFC977   nntpurl           nntp     hostport     group       digits      TELNET  telneturl         telnet     login            WAIS  see also RFC1625   waisurl          waisdatabase   waisindex   waisdoc waisdatabase      wais     hostport     database waisindex         wais     hostport     database     search waisdoc           wais     hostport     database     wtype     wpath database          uchar wtype             uchar wpath             uchar    PROSPERO  prosperourl       prospero     hostport     ppath    fieldspec   ppath            psegment        psegment   psegment            uchar                                 fieldspec            fieldname     fieldvalue fieldname           uchar                           fieldvalue          uchar                              Miscellaneous definitions  lowalpha          a     b     c     d     e     f     g     h                      i     j     k     l     m     n     o     p                      q     r     s     t     u     v     w     x                      y     z  hialpha           A     B     C     D     E     F     G     H     I                      J     K     L     M     N     O     P     Q     R                      S     T     U     V     W     X     Y     Z  alpha            lowalpha   hialpha digit             0     1     2     3     4     5     6     7                      8     9  safe                    -                    extra                                              national                                                             punctuation                          reserved                                                 hex              digit    A     B     C     D     E     F                      a     b     c     d     e     f  escape               hex hex  unreserved       alpha   digit   safe   extra uchar            unreserved   escape xchar            unreserved   reserved   escape digits           1 digit

User · Answer

An easy way to parse  and validate  URL s is the urlparse  py2  py3  module     A regex is too much work     There s no  validate  method because almost anything is a valid URL   There are some punctuation rules for splitting it up   Absent any punctuation  you still have a valid URL   Check the RFC carefully and see if you can construct an  invalid  URL   The rules are very flexible     For example       is a valid URL   The path is           A pretty stupid filename  but a valid filename   Also        is a valid URL   The netloc   hostname   is      The path is         Again  stupid   Also valid   This URL normalizes to       which is the equivalent   Something like  bad      worse       is perfectly valid   Dumb but valid   Bottom Line   Parse it  and look at the pieces to see if they re displeasing in some way     Do you want the scheme to always be  http    Do you want the netloc to always be  www somename somedomain    Do you want the path to look unix-like   Or windows-like   Do you want to remove the query string   Or preserve it   These are not RFC-specified validations   These are validations unique to your application

User · Answer

modified django url validation regex  import re  ul     u00a1- uffff     unicode letters range  must not be a raw string     IP patterns  ipv4 re   r    25 0-5  2 0-4  d  0-1   d  d         25 0-5  2 0-4  d  0-1   d  d   3    ipv6 re   r    0-9a-f            Host patterns  hostname re   r  a-z    ul   r 0-9     a-z    ul   r 0-9-  0 61  a-z    ul   r 0-9     domain re   r         -  a-z    ul   r 0-9-  1 63    lt  -       domain names have max length of 63 characters tld re          r                                      dot      r    -                                 can t start with a dash      r     a-z    ul    -  2 63             domain label      r  xn-- a-z0-9  1 59                   or punycode label      r    lt  -                                can t end with a dash      r                                      may have a trailing dot     host re         hostname re   domain re   tld re     localhost    regex   re compile       r     http ftp s        http s     or ftp s         r     S      S           user pass authentication      r        ipv4 re         ipv6 re         host re         localhost or ip     r      d 2 5        optional port     r            s         resource path     r  Z   re IGNORECASE   source  https   github com django django blob master django core validators py L74

User · Answer

I admit  I find your regular expression totally incomprehensible   I wonder if you could use urlparse instead   Something like   pieces   urlparse urlparse url  assert all  pieces scheme  pieces netloc   assert set pieces netloc   lt   set string letters   string digits    -       and others  assert pieces scheme in   http    https    ftp      etc    It might be slower  and maybe you ll miss conditions  but it seems  to me  a lot easier to read and debug than a regular expression for URLs

User · Answer

I ve needed to do this many times over the years and always end up copying someone else s regular expression who has thought about it way more than I want to think about it   Having said that  there is a regex in the Django forms code which should do the trick   http   code djangoproject com browser django trunk django forms fields py L534

User · Answer

note - Lepl is no longer maintained or supported   RFC 3696 defines  best practices  for URL validation - http   www faqs org rfcs rfc3696 html  The latest release of Lepl  a Python parser library  includes an implementation of RFC 3696   You would use it something like   from lepl apps rfc3696 import Email  HttpUrl    compile the validators  do once at start of program  valid email   Email   valid http url   HttpUrl      use the validators  as often as you like  if valid email some email         email is ok else        email is bad if valid http url some url         url is ok else        url is bad   Although the validators are defined in Lepl  which is a recursive descent parser  they are largely compiled internally to regular expressions   That combines the best of both worlds - a  relatively  easy to read definition that can be checked against RFC 3696 and an efficient implementation   There s a post on my blog showing how this simplifies the parser - http   www acooke org cute LEPLOptimi0 html  Lepl is available at http   www acooke org lepl and the RFC 3696 module is documented at http   www acooke org lepl rfc3696 html  This is completely new in this release  so may contain bugs   Please contact me if you have any problems and I will fix them ASAP   Thanks

User · Answer

urlfinders         re compile    0-9  1 3     0-9  1 3     0-9  1 3     0-9  1 3     news telnet nttp file http ftp https       www ftp  -A-Za-z0-9       -A-Za-z0-9         0-9      -A-Za-z0-9                           amp                        gt                  re compile    0-9  1 3     0-9  1 3     0-9  1 3     0-9  1 3     news telnet nttp file http ftp https       www ftp  -A-Za-z0-9       -A-Za-z0-9         0-9            re compile               -A-Za-z0-9                           amp                              re compile      lt   mailto     -A-Za-z0-9       -A-Za-z0-9             NOTE  As ugly as it looks in your browser just copy paste and the formatting should be good  Found at the python mailing lists and used for the gnome-terminal  source  http   mail python org pipermail python-list 2007-January 595436 html

User · Answer

The regex provided should match any url of the form http   www ietf org rfc rfc3986 txt  and does when tested in the python interpreter   What format have the URLs you ve been having trouble parsing had

User · Answer

Nowadays  in 90  of case if you working with URL in Python you probably use python-requests  Hence the question here - why not reuse URL validation from requests  from requests models import PreparedRequest import requests exceptions   def check url url       prepared request   PreparedRequest       try          prepared request prepare url url  None          return prepared request url     except requests exceptions MissingSchema  e          raise SomeException  Features   Don t reinvent the wheel DRY Work offline Minimal resource

User · Answer

http   pypi python org pypi rfc3987 gives regular expressions for consistency with the rules in RFC 3986 and RFC 3987  that is  not with scheme-specific rules    A regexp for IRI reference is     P lt scheme gt  a-zA-Z  a-zA-Z0-9  -           P lt iauthority gt      P lt iuserinfo gt         a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U0002 0000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U 00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009ff fd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U00 0dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                    P lt ihost gt            0-9A-F  1 4    6     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4   0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9            0 -9A-F  1 4    5     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01    0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9       0-9A-F  1 4         0-9A-F  1 4    4     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9    01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F   1 4     0-9A-F  1 4         0-9A-F  1 4    3     0-9A-F  1 4   0-9A-F  1 4            25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01    0-9  0-9             0-9A-F  1 4     2  0-9A-F  1 4         0-9A-F  1 4    2      0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3     25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4     3  0-9A-F  1  4         0-9A-F  1 4       0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0 -9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9             0- 9A-F  1 4     4  0-9A-F  1 4         0-9A-F  1 4   0-9A-F  1 4           25 0-5   2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9              0-9A-F  1 4     5  0-9A-F  1 4      0-9A-F  1 4         0-9A-F  1 4     6   0-9A-F  1 4      v 0-9A-F         a-zA-Z0-9   -      amp                             25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9   0-9            a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000-  U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U000500 00- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00 090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd  U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                    P lt port gt  0-9        P lt ipath gt            a-zA-Z0-9   -    xa0- ud7ff uf900- uf dcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd  U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007f ffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U0 00bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A- F  0-9A-F      amp                      P lt ipath gt            a-zA-Z0-9   -    xa0- ud7 ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000 - U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U0007 0000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U 000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000eff fd     0-9A-F  0-9A-F      amp                           a-zA-Z0-9   -    xa0- ud7ff  uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000-  U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U000700 00- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U00 0b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd      0-9A-F  0-9A-F      amp                        P lt ipath gt        a-zA-Z0-9   -     xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U 00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006ff fd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U00 0afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000-  U000efffd     0-9A-F  0-9A-F      amp                           a-zA-Z0-9   -    xa 0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00 030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd  U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000a fffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U 000efffd     0-9A-F  0-9A-F      amp                      P lt ipath gt           P lt iquery  gt           a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U000 1fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000-  U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U000900 00- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U00 0d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                   ue000- uf8ff U000f0000- U000ffffd U00100000- U0010fffd                    P lt ifra gment gt           a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000-  U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050 000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U0 0090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfff d U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                                      P lt iauthority gt      P lt iuserinfo gt        a-zA-Z0-9   -    xa 0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00 030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd  U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000a fffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U 000efffd     0-9A-F  0-9A-F      amp                    P lt ihost gt           0-9A-F  1  4    6     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0- 9        3    25 0-5  2 0-4  0-9   01   0-9  0-9            0-9A-F  1 4    5      0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3     25 0-5  2 0-4  0-9   01   0-9  0-9       0-9A-F  1 4        0-9A-F  1 4    4      0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9         3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4     0-9A-F  1  4         0-9A-F  1 4    3     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0- 4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9              0-9A-F  1 4     2  0-9A-F  1 4         0-9A-F  1 4    2     0-9A-F  1 4   0-9A -F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4   0-9   01   0-9  0-9             0-9A-F  1 4     3  0-9A-F  1 4         0-9A-F  1  4       0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9         3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4     4  0- 9A-F  1 4         0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01    0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4      5  0-9A-F  1 4      0-9A-F  1 4         0-9A-F  1 4     6  0-9A-F  1 4       v 0-9A-F         a-zA-Z0-9   -      amp                            25 0-5  2 0-4  0- 9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9            a-zA -Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000 - U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U0006 0000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U 000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dff fd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                   P lt port gt  0-9         P lt ipath gt            a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U0 0010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fff d U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U000 8fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000-  U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                       P lt ipath gt            a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufd f0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U000400 00- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00 080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd  U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A -F      amp                           a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0 - uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000 - U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U0008 0000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U 000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F       amp                        P lt ipath gt        a-zA-Z0-9   -    xa0- ud7ff uf900- u fdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd  U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007 fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U 000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A -F  0-9A-F      amp                         a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf  ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00 040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd  U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000b fffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F   0-9A-F      amp                      P lt ipath gt           P lt iquery gt           a-zA-Z0-9    -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U000 2fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000-  U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a00 00- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U00 0e1000- U000efffd     0-9A-F  0-9A-F      amp                  ue000- uf8ff U000f000 0- U000ffffd U00100000- U0010fffd                    P lt ifragment gt           a-zA- Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000-  U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060 000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U0 00a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfff d U000e1000- U000efffd     0-9A-F  0-9A-F      amp                              In one line     P lt scheme gt  a-zA-Z  a-zA-Z0-9  -           P lt iauthority gt      P lt iuserinfo gt        a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                    P lt ihost gt           0-9A-F  1 4    6     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9            0-9A-F  1 4    5     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9       0-9A-F  1 4        0-9A-F  1 4    4     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4     0-9A-F  1 4         0-9A-F  1 4    3     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4     2  0-9A-F  1 4         0-9A-F  1 4    2     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4     3  0-9A-F  1 4         0-9A-F  1 4       0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4     4  0-9A-F  1 4         0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4     5  0-9A-F  1 4      0-9A-F  1 4         0-9A-F  1 4     6  0-9A-F  1 4      v 0-9A-F         a-zA-Z0-9   -      amp                            25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9            a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                   P lt port gt  0-9        P lt ipath gt            a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                      P lt ipath gt            a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                           a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                        P lt ipath gt        a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                           a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                      P lt ipath gt           P lt iquery gt           a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                  ue000- uf8ff U000f0000- U000ffffd U00100000- U0010fffd                    P lt ifragment gt           a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                                     P lt iauthority gt      P lt iuserinfo gt        a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                    P lt ihost gt           0-9A-F  1 4    6     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9            0-9A-F  1 4    5     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9       0-9A-F  1 4        0-9A-F  1 4    4     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4     0-9A-F  1 4         0-9A-F  1 4    3     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4     2  0-9A-F  1 4         0-9A-F  1 4    2     0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4     3  0-9A-F  1 4         0-9A-F  1 4       0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4     4  0-9A-F  1 4         0-9A-F  1 4   0-9A-F  1 4           25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9             0-9A-F  1 4     5  0-9A-F  1 4      0-9A-F  1 4         0-9A-F  1 4     6  0-9A-F  1 4      v 0-9A-F         a-zA-Z0-9   -      amp                            25 0-5  2 0-4  0-9   01   0-9  0-9        3    25 0-5  2 0-4  0-9   01   0-9  0-9            a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                   P lt port gt  0-9        P lt ipath gt            a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                      P lt ipath gt            a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                           a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                        P lt ipath gt        a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                         a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                      P lt ipath gt           P lt iquery gt           a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp                  ue000- uf8ff U000f0000- U000ffffd U00100000- U0010fffd                    P lt ifragment gt           a-zA-Z0-9   -    xa0- ud7ff uf900- ufdcf ufdf0- uffef U00010000- U0001fffd U00020000- U0002fffd U00030000- U0003fffd U00040000- U0004fffd U00050000- U0005fffd U00060000- U0006fffd U00070000- U0007fffd U00080000- U0008fffd U00090000- U0009fffd U000a0000- U000afffd U000b0000- U000bfffd U000c0000- U000cfffd U000d0000- U000dfffd U000e1000- U000efffd     0-9A-F  0-9A-F      amp

[python] How do you validate a URL with a regular expression in Python?

Examples related to python

Examples related to regex

Examples related to google-app-engine