"

 COPYRIGHT (c) 2002 by eXept Software AG

              All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

"{ Package: 'stx:libbasic2' }"

URI subclass:#HierarchicalURI

	instanceVariableNames:'authority isAbsolute isDirectory pathSegments query fragment'

	classVariableNames:''

	poolDictionaries:''

	category:'Net-Resources'

!

!HierarchicalURI class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 2002 by eXept Software AG

              All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

documentation

"

    Hierarchical URI as defined in RFC2396:

    <scheme:[//authority][/absolute_path][?query][#fragment]>

    [author:]

        Stefan Vogel (stefan@zwerg)

    [see also:]

    [instance variables:]

    [class variables:]

"

!

examples

"

  more examples to be added:

                                                                [exBegin]

    |u1 u2|

    u1 := URI fromString:'file:/phys/exept/tmp/'.

    u2 := u1 construct:'test.txt'.

    Transcript showCR:u1.

    Transcript showCR:u2.

                                                                [exEnd]

                                                                [exBegin]

    |u1 u2|

    u1 := URI fromString:'file:/phys/exept/tmp'.

    u2 := u1 construct:'test.txt'.

    Transcript showCR:u1.

    Transcript showCR:u2.

                                                                [exEnd]

"

! !

!HierarchicalURI class methodsFor:'instance creation'!

new

    ^ self basicNew initialize

!

scheme:aSchemeString fromString:aString

    "parse the hierarchical information.

     schemeString is ignored here"

    ^ self new scheme:aSchemeString; 

               fromString:aString

! !

!HierarchicalURI methodsFor:'accessing'!

authority

    "return the value of the instance variable 'authority' (automatically generated)"

    ^ authority

!

authority:something

    "set the value of the instance variable 'authority' (automatically generated)"

    authority := something.

!

baseName

    ^ pathSegments last

    "

     (URI fromString:'file:/phys/exept/tmp/foo.html') baseName. 

     (URI fromString:'file:/phys/exept/tmp/foo') baseName.      

     (URI fromString:'file:/phys/exept/tmp/') baseName.         

     (URI fromString:'file:/phys/') baseName.         

     (URI fromString:'file:/phys') baseName.         

     (URI fromString:'file://phys/exept/tmp/foo.html') baseName. 

     (URI fromString:'file://phys/exept/tmp/foo') baseName.      

     (URI fromString:'file://phys/exept/tmp/') baseName.         

     (URI fromString:'file://phys/exept/tmp') baseName.         

     (URI fromString:'file://phys/exept/') baseName.         

     (URI fromString:'file://phys/exept') baseName.         

     (URI fromString:'file://phys/') baseName.         

     (URI fromString:'file://phys') baseName.         

     (URI fromString:'file://') baseName.

    "

!

examples

"

  more examples to be added:

                                                                [exBegin]

        URI fromString:'file:/phys/exept/home/tm/tmp'

                                                                [exEnd]

"

!

fragment

    "return the value of the instance variable 'fragment' (automatically generated)"

    ^ fragment

!

fragment:something

    "set the value of the instance variable 'fragment' (automatically generated)"

    fragment := something.

!

isAbsolute

    "return the value of the instance variable 'isAbsolute' (automatically generated)"

    ^ isAbsolute

!

isDirectory

    "return the value of the instance variable 'isDirectory' (automatically generated)"

    ^ isDirectory ? false

!

pathSegments

    "return the value of the instance variable 'pathSegments' (automatically generated)"

    ^ pathSegments

!

pathSegments:something

    "set the value of the instance variable 'pathSegments' (automatically generated)"

    pathSegments := something.

!

query

    "return the value of the instance variable 'query' (automatically generated)"

    ^ query

!

query:something

    "set the value of the instance variable 'query' (automatically generated)"

    query := something.

! !

!HierarchicalURI methodsFor:'accessing-details'!

host

    "answer the host part of authority"

    |start end|

    authority isNil ifTrue:[

        ^ nil

    ].

    start := (authority indexOf:$@) + 1.

    end := (authority indexOf:$: startingAt:start) - 1.

    end == -1 ifTrue:[

        end := authority size

    ].

    ^ authority copyFrom:start to:end

    "

      (self fromString:'ftp://stefan@www.exept.de:80/test') host

      (self fromString:'ftp://www.exept.de:80/test') host

      (self fromString:'ftp://www.exept.de/test') host

    "

!

password

    "answer the user part of authority"

    |end start|

    authority isNil ifTrue:[

        ^ nil

    ].

    end := authority indexOf:$@.

    end == 0 ifTrue:[

        ^ nil

    ].

    start := authority indexOf:$:.

    (start == 0 or:[start > end]) ifTrue:[

        ^ nil

    ].

    ^ authority copyFrom:start+1 to:end-1

    "

      (self fromString:'ftp://stefan@www.exept.de:80/test') password

      (self fromString:'ftp://stefan:pass@www.exept.de:80/test') password

      (self fromString:'ftp://www.exept.de:80/test') password

    "

!

port

    "answer the port part of authority"

    |start|

    authority isNil ifTrue:[

        ^ self defaultPort

    ].

    start := authority indexOf:$@.

    start := authority indexOf:$: startingAt:start.

    start == 0 ifTrue:[

        ^ self defaultPort

    ].

    ^ authority copyFrom:start+1

    "

      (self fromString:'ftp://stefan@www.exept.de:80/test') port

      (self fromString:'ftp://www.exept.de:80/test') port

      (self fromString:'ftp://www.exept.de/test') port

    "

!

user

    "answer the user part of authority"

    |end end1|

    authority isNil ifTrue:[

        ^ nil

    ].

    end := authority indexOf:$@.

    end == 0 ifTrue:[

        ^ nil

    ].

    end1 := authority indexOf:$:.

    end1 ~~ 0 ifTrue:[

        end := end min:end1.

    ].

    ^ authority copyTo:end-1

    "

      (self fromString:'ftp://stefan@www.exept.de:80/test') user

      (self fromString:'ftp://stefan:pass@www.exept.de:80/test') user

      (self fromString:'ftp://www.exept.de:80/test') user

    "

! !

!HierarchicalURI methodsFor:'comparing'!

= anHierarchicalUri

    ^ self class == anHierarchicalUri class 

      and:[self scheme = anHierarchicalUri scheme

      and:[pathSegments = anHierarchicalUri pathSegments

      and:[authority = anHierarchicalUri authority

      and:[self isAbsolute = anHierarchicalUri isAbsolute

      and:[self isDirectory = anHierarchicalUri isDirectory

      and:[query = anHierarchicalUri query

      and:[fragment = anHierarchicalUri fragment]]]]]]]

!

hash

    ^ pathSegments hash xor:query hash

! !

!HierarchicalURI methodsFor:'copying'!

postCopy

    pathSegments := pathSegments copy

! !

!HierarchicalURI methodsFor:'defaults'!

defaultPort

   "answer the default port for the given scheme.

    Concrete subclasses redefine this method"

   ^ nil

! !

!HierarchicalURI methodsFor:'escape'!

unEscape

    "convert escaped characters (such as %20 for ' ') to their native

     representation"

    authority := self class unEscape:authority readStream.

    pathSegments keysAndValuesDo:[:i :v|

        pathSegments at:i put:(self class unEscape:v readStream).

    ].

    query := self class unEscape:query readStream.

    fragment := self class unEscape:fragment readStream.

! !

!HierarchicalURI methodsFor:'initialization'!

fromString:aString

    |i i1 separator|

    (aString startsWith:'//') ifTrue:[

        i := aString indexOfAny:'/?#' startingAt:3.

        i == 0 ifTrue:[

            authority := aString copyFrom:3.

            ^ self.

        ] ifFalse:[

            separator := aString at:i.

            authority := aString copyFrom:3 to:i-1.

        ].

        (isAbsolute := (aString at:i) == $/).

    ] ifFalse:[

        (isAbsolute := aString startsWith:$/) ifTrue:[

            i := 1.

        ] ifFalse:[

            i := 0.

        ]

    ].

    [

        i1 := aString indexOfAny:'/?#' startingAt:i+1.

        i1 == 0 ifTrue:[ |path|

            path := aString copyFrom:i+1.

            path size ~~ 0 ifTrue:[

                pathSegments add:path.

            ] ifFalse:[

                (aString at:i) == $/ ifTrue:[

                    isDirectory := true

                ].

            ].

            ^ self.

        ] ifFalse:[

            separator := aString at:i1.

            pathSegments add:(aString copyFrom:i+1 to:i1-1).

            isAbsolute ifTrue:[

                pathSegments size == 1 ifTrue:[

                    (pathSegments first startsWith:$~) ifTrue:[

                        isAbsolute := false

                    ].

                ].

            ].

            i := i1.

        ].

    ] doWhile:[separator == $/].

    separator == $? ifTrue:[

        i1 := aString indexOf:$# startingAt:i+1.

        i1 == 0 ifTrue:[

            query := aString copyFrom:i+1.

            ^ self.

        ] ifFalse:[

            separator := aString at:i1.

            query := aString copyFrom:i+1 to:i1-1.

            i := i1.

        ].

    ].

    separator == $# ifTrue:[

        fragment := aString copyFrom:i+1.

    ].

    "

     self new fromString:'//exept~/tmp'  

     self new fromString:'~/tmp'        

     self new fromString:'/~/tmp'       

     self new fromString:'//authority/path1/path2/' 

     self new fromString:'//authority/path1/path2?query'

     self new fromString:'//authority/path1/path2?query#fragment'

     self new fromString:'/path1/path2?query#fragment'

     self new fromString:'/path1/path2#fragment'

     self new fromString:'path1/path2#fragment'

    "    

!

initialize

    pathSegments := OrderedCollection new.

! !

!HierarchicalURI methodsFor:'printing & storing'!

directoryPath

    "answer the directory path part of the URI"

    |aStream|

    aStream := WriteStream on:''.

    pathSegments size ~~ 0 ifTrue: [

        self isAbsolute ifTrue:[

            aStream nextPut:$/.

        ].

        pathSegments size > 1 ifTrue:[

            (pathSegments copyTo:pathSegments size-1) do:[:p|

                self class escape:p allow:'~;:@&=+",' on:aStream

            ] separatedBy:[

                aStream nextPut:$/

            ].

        ].

    ].

    ^ aStream contents

!

path

    "answer the path part of the URI"

    |aStream|

    aStream := WriteStream on:''.

    pathSegments size ~~ 0 ifTrue: [

        self isAbsolute ifTrue:[

            aStream nextPut:$/.

        ].

        pathSegments do:[:p|

            self class escape:p allow:'~;:@&=+",' on:aStream

        ] separatedBy:[

            aStream nextPut:$/

        ].

    ].

    query notNil ifTrue: [

        aStream nextPut:$?.

        self class escape:query allow:nil on:aStream

    ].

    fragment notNil ifTrue: [

        aStream nextPut:$#.

        self class escape:fragment allow:nil on:aStream

    ].

    ^ aStream contents

!

printOn:aStream

    self printOn:aStream escape:false

!

printOn:aStream escape:doEscape

    "print the URI on aStream. If doEscape is set, escape special

     characters"

    super printOn:aStream.

    authority notNil ifTrue: [

        aStream nextPutAll:'//'.

        doEscape ifTrue:[

            self class escape:authority allow:'~$,;:@&=+' on:aStream

        ] ifFalse:[

            aStream nextPutAll:authority

        ]

    ].

    self printPathOn:aStream escape:doEscape.

!

printPathOn:aStream escape:doEscape

    "print the path part"

    pathSegments size ~~ 0 ifTrue: [

        self isAbsolute ifTrue:[

            aStream nextPut:$/.

        ].

        pathSegments do:[:p|

            doEscape ifTrue:[

                self class escape:p allow:'~;:@&=+",' on:aStream

            ] ifFalse:[

                aStream nextPutAll:p

            ]

        ] separatedBy:[

            aStream nextPut:$/

        ].

    ].

    query notNil ifTrue: [

        aStream nextPut:$?.

        doEscape ifTrue:[

            self class escape:query allow:nil on:aStream