Fan

 

const final class

sys::Uri

sys::Obj
  sys::Uri

Uri is used to immutably represent a Universal Resource Identifier according to RFC 3986. The generic format for a URI is:

<uri>        := [<scheme> ":"] <body>
<body>       := ["//" <auth>] ["/" <path>] ["?" <query>] ["#" <frag>]
<auth>       := [<userInfo> "@"] <host> [":" <port>]
<path>       := <name> ("/" <name>)*
<name>       := <basename> ["." <ext>]
<query>      := <queryPair> (<querySep> <queryPair>)*
<querySep>   := "&" | ";"
<queryPair>  := <queryKey> ["=" <queryVal>]
<gen-delims> := ":" / "/" / "?" / "#" / "[" / "]" / "@"

Uris are expressed in the following forms:

  • Standard Form: any char allowed, general delimiters are "\" escaped
  • Encoded Form: %HH percent encoded

In standard form the full range of Unicode characters is allowed in all sections except the general delimiters which separate sections. For example ? is barred in any section before the query, but is permissible in the query string itself or the fragment identifier. The scheme must be strictly defined in terms of ASCII alphanumeric, ".", "+", or "-". Any general delimiter used outside of its normal role, must be escaped using the "\" backslash character. The backslash itself is escaped as "\\". For example a filename with the "#" character is represented as "file \#2". Only the path, query, and fragment sections can use escaped general delimiters; the scheme and authority sections cannot use escaped general delimters.

Encoded form as defined by RFC 3986 uses a stricter set of rules for the characters allowed in each section of the URI (scheme, userInfo, host, path, query, and fragment). Any character outside of the allowed set is UTF-8 encoded into octets and %HH percent encoded. The encoded form should be used when working with external applications such as HTTP, HTML, or XML.

The Uri API is designed to work with the standard form of the Uri. Access methods like host, pathStr, or queryStr all use standard form. To summarize different ways of working with Uri:

Uri can be used to model either absolute URIs or relative references. The plus and relTo methods can be used to resolve and relativize relative references against a base URI.

Slots

authSource

Str? auth()

The authority represents a network endpoint in the format:

[<userInfo> "@"] host [":" <port>]

Examples:

`http://user@host:99/`.auth  =>  "user@host:99"
`http://host/`.auth          =>  "host"
`/dir/file.txt`.auth         =>  null
basenameSource

Str basename()

Return file name without the extension (everything up to the last dot) or "" if name is "".

Examples:

`/`.basename            =>  ""
`/a/file.txt`.basename  =>  "file"
`/a/file`.basename      =>  "file"
`/a/file.`.basename     =>  "file"
`..`.basename           =>  ".."
checkNameSource

static Void checkName(Str name)

If the specified string is not a valid name according to the isName method, then throw NameErr.

decodeSource

static Uri? decode(Str s, Bool checked := true)

Parse an ASCII percent encoded string into a Uri according to RFC 3986. All %HH escape sequences are translated into octects, and then the octect sequence is UTF-8 decoded into a Str. The + character in the query section is unescaped into a space. If checked if true then throw ParseErr if the string is a malformed URI or if not encoded correctly, otherwise return null. Refer to fromStr for normalization rules.

decodeQuerySource

static Str:Str decodeQuery(Str s)

Decode a map of query parameters which are URL encoded according to the "application/x-www-form-urlencoded" MIME type. This method will unescape % percent encoding and + into space. The parameters are parsed into map using the same semantics as Uri.query. Throw ArgErr is the string is malformed. See encodeQuery.

encodeSource

Str encode()

Return the percent encoded string for this Uri according to RFC 3986. Each section of the Uri is UTF-8 encoded into octects and then percent encoded according to its valid character set. Spaces in the query section are encoded as +.

encodeQuerySource

static Str encodeQuery(Str:Str q)

Encode a map of query parameters into URL percent encoding according to the "application/x-www-form-urlencoded" MIME type. See decodeQuery.

equalsSource

override Bool equals(Obj? that)

Overrides sys::Obj.equals

Two Uris are equal if they have same string normalized representation.

extSource

Str? ext()

Return file name extension (everything after the last dot) or null if name is null or name has no dot.

Examples:

`/`.ext            =>  null
`/a/file.txt`.ext  =>  "txt"
`/Foo.Bar`.ext     =>  "Bar"
`/a/file`.ext      =>  null
`/a/file.`.ext     =>  ""
`..`.ext           =>  null
fragSource

Str? frag()

Return the fragment component of the Uri which is everything after the "#". Return null if no fragment specified.

Examples:

`http://host/path?query#frag`.frag  =>  "frag"
`http://host/path`                  =>  null
`#h1`                               =>  "h1"
fromStrSource

static Uri? fromStr(Str s, Bool checked := true)

Parse the specified string into a Uri. If invalid format and checked is false return null, otherwise throw ParseErr. a standard form Unicode string into its generic parts. It does not unescape % or + and handles normal Unicode characters in the string. If general delimiters such as the "?" or "#" characters are used outside their normal role, then they must be backslash escaped.

All Uris are automatically normalized as follows:

  • Replacing "." and ".." segments in the middle of a path
  • Scheme always normalizes to lowercase
  • If http then port 80 normalizes to null
  • If http then a null path normalizes to /
getSource

Obj? get(Obj? base := null, Bool checked := true)

Resolve this Uri into an Fan object. See docLang for the resolve process.

hashSource

override Int hash()

Overrides sys::Obj.hash

Return a hash code based on the normalized string representation.

hostSource

Str? host()

Return the host address of the URI or null if not available. The host is in the format of a DNS name, IPv4 address, or IPv6 address surrounded by square brackets. Return null if the uri is not absolute.

Examples:

`ftp://there:78/file`.host            =>  "there"
`http://www.cool.com/`.host           =>  "www.cool.com"
`http://user@10.162.255.4/index`.host =>  "10.162.255.4"
`http://[::192.9.5.5]/`.host          =>  "[::192.9.5.5]"
`//foo/bar`.host                      =>  "foo"
`/bar`.host                           =>  null
isAbsSource

Bool isAbs()

Return if an absolute Uri which means it has a non-null scheme.

isDirSource

Bool isDir()

A Uri represents a directory if it has a non-null path which ends with a "/" slash. Directories are joined with other Uris relative to themselves versus non-directories which are joined relative to their parent.

Examples:

`/a/b`.isDir   =>  false
`/a/b/`.isDir  =>  true
`/a/?q`.isDir  =>  true
isNameSource

static Bool isName(Str name)

Return if the specified string is an valid name segment to use in an unencoded URI. The name must be at least one char long and can never be "." or "..". The legal characters are defined by as follows from RFC 3986:

unreserved  =  ALPHA / DIGIT / "-" / "." / "_" / "~"
ALPHA       =  %x41-5A / %x61-7A   ; A-Z / a-z
DIGIT       =  %x30-39 ; 0-9

Although RFC 3986 does allow path segments to contain other special characters such as sub-delims, Fan takes a strict approach to names to be used in URIs.

isPathAbsSource

Bool isPathAbs()

Return if the path starts with a leading slash. If pathStr is null, then return false.

Examples:

`http://foo/`.isPathAbs    =>  true
`/dir/f.txt`.isPathAbs     =>  true
`dir/f.txt`.isPathAbs      =>  false
`../index.html`.isPathAbs  =>  false
isPathOnlySource

Bool isPathOnly()

Return if this Uri contains only a path component. The authority (scheme, host, port), query, and fragment must be null.

isRelSource

Bool isRel()

Return if a relative Uri which means it has a null scheme.

mimeTypeSource

MimeType? mimeType()

Return the MimeType mapped by the ext or null if no mapping. If this uri is to a directory, then "x-directory/normal" is returned.

Examples:

`file.txt`  =>  text/plain
`somefile`  =>  null
nameSource

Str name()

Return simple file name which is path.last or "" if the path is empty.

Examples:

`/`.name            =>  ""
`/a/file.txt`.name  =>  "file.txt"
`/a/file`.name      =>  "file"
`somedir/`.name     =>  "somedir"
parentSource

Uri? parent()

Return the parent directory of this Uri or null if a parent path cannot be computed from this Uri. If the path is not empty, then this method is equivalent to slice(0..-2).

Examples:

`http://foo/a/b/c?q#f`.parent  =>  `http://foo/a/b/`
`/a/b/c/`.parent  =>  `/a/b/`)
`a/b/c`.parent    =>  `a/b/`
`/a`.parent       =>   `/`
`/`.parent        =>   null
`a.txt`.parent    =>   null
pathSource

Str[] path()

Return the path parsed into a list of simple names or an empty list if the pathStr is "" or "/". Any general delimiters in the path such "?" or "#" are backslash escaped.

Examples:

`mailto:me@there.com`  =>  null
`http://host`.path     =>  Str[,]
`http://foo/`.path     =>  Str[,]
`/`.path               =>  Str[,]
`/a`.path              =>  ["a"]
`/a/b`.path            =>  ["a", "b"]
`../a/b`.path          =>  ["..", "a", "b"]
pathOnlySource

Uri pathOnly()

Return a new Uri with only a path part. If this Uri has an authority, fragment, or query they are stripped off.

Examples:

`http://host/a/b/c?query`.pathOnly =>  `/a/b/c`
`http://host/a/b/c/`.pathOnly      =>  `/a/b/c/`
`/a/b/c`.pathOnly                  =>  `/a/b/c`
`file.txt`.pathOnly                =>  `file.txt`
pathStrSource

Str pathStr()

Return the path component of the Uri. Any general delimiters in the path such "?" or "#" are backslash escaped.

Examples:

`mailto:me@there.com`  =>  "me@there.com"
`http://host`          =>  ""
`http://foo/`.pathStr  =>  "/"
`/a`.pathStr           =>  "/a"
`/a/b`.pathStr         =>  "/a/b"
`../a/b`.pathStr       =>  "../a/b"
plusSource

Uri plus(Uri toAppend)

Return a new Uri with the specified Uri appended to this Uri.

Examples:

`http://foo/path` + `http://bar/`  =>  `http://bar/`
`http://foo/path?q#f` + `newpath`  =>  `http://foo/newpath`
`http://foo/path/?q#f` + `newpath` =>  `http://foo/path/newpath`
`a/b/c`  + `d`                     =>  `a/b/d`
`a/b/c/` + `d`                     =>  `a/b/c/d`
`a/b/c`  + `../../d`               =>  `d`
`a/b/c/` + `../../d`               =>  `a/d`
`a/b/c`  + `../../../d`            =>  `../d`
`a/b/c/` + `../../../d`            =>  `d`
plusNameSource

Uri plusName(Str name, Bool asDir := false)

Return a new Uri with a single path name appended to this Uri. If asDir is true, then add a trailing slash to the Uri to make it a directory Uri. This method is potentially much more efficient than using plus when appending a single name.

Examples:

`dir/`.plusName("foo")        =>  `dir/foo`
`dir/`.plusName("foo", true)  =>  `dir/foo/`
`/dir/file`.plusName("foo")   =>  `/dir/foo`
`/dir/#frag`.plusName("foo")  =>  `/dir/foo`
plusQuerySource

Uri plusQuery([Str:Str]? query)

Add the specified query key/value pairs to this Uri. If this uri has an existing query, then it is merged with the given query. The key/value pairs should not be backslash escaped or percent encoded. If the query param is null or empty, return this instance.

Examples:

`http://h/`.plusQuery(["k":"v"])         =>  `http://h/?k=v`
`http://h/?k=old`.plusQuery(["k":"v"])   =>  `http://h/?k=v`
`/foo?a=b`.plusQuery(["k":"v"])          =>  `/foo?a=b&k=v`
`?a=b`.plusQuery(["k1":"v1", "k2":"v2"]) =>  `?a=b&k1=v1&k2=v2`
plusSlashSource

Uri plusSlash()

Add a trailing slash to the path string of this Uri to make it a directory Uri.

Examples

`http://h/dir`.plusSlash  => `http://h/dir/`
`/a`.plusSlash            =>  `/a/`
`/a/`.plusSlash           =>  `/a/`
`/a/b`.plusSlash          =>  `/a/b/`
`/a?q`.plusSlash          =>  `/a/?q`
portSource

Int? port()

Return the IP port of the host for the network end point. It is optionally embedded in the authority using the ":" character. If unspecified then return null.

Examples:

`http://foo:81/`.port        =>  81
`http://www.cool.com/`.port  =>  null
querySource

Str:Str query()

Return the query parsed as a map of key/value pairs. If no query string was specified return an empty map (this method will never return null). The query is parsed such that pairs are separated by the "&" or ";" characters. If a pair contains the "=", then it is split into a key and value, otherwise the value defaults to "true". If delimiters such as "&", "=", or ";" are in the keys or values, then they are not escaped.

Examples:

`http://host/path?query`.query  =>  ["query":"true"]
`http://host/path`.query        =>  [:]
`?a=b;c=d`.query                =>  ["a":"b", "c":"d"]
`?a=b&c=d`.query                =>  ["a":"b", "c":"d"]
`?a=b;;c=d;`.query              =>  ["a":"b", "c":"d"]
`?a=b;;c`.query                 =>  ["a":"b", "c":"true"]
queryStrSource

Str? queryStr()

Return the query component of the Uri which is everything after the "?" but before the "#" fragment. Return null if no query string specified. Any delimiters used in keys or values such as "&", "=", or ";" are backslash escaped.

Examples:

`http://host/path?query#frag`.queryStr =>  "query"
`http://host/path?query`.queryStr      =>  "query"
`http://host/path`.queryStr            =>  null
`../foo?a=b&c=d`.queryStr              =>  "a=b&c=d"
`?a=b;c;`.queryStr                     =>  "a=b;c;"
relToSource

Uri relTo(Uri base)

Relativize this uri against the specified base.

Examples:

`http://foo/a/b/c`.relTo(`http://foo/a/b/c`) => ``
`http://foo/a/b/c`.relTo(`http://foo/a/b`)   => `c`
`//foo/a/b/c`.relTo(`http://foo/`)           => `a/b/c`
`/a/b/c`.relTo(`/a`)                         => `b/c`
relToAuthSource

Uri relToAuth()

Relativize this uri against its authority. This method strips the authority if present and keeps the path, query, and fragment segments.

Examples:

`http://host/a/b/c?q#frag`.relToAuth  => `/a/b/c?q#frag`
`http://host/a/b/c`.relToAuth         => `/a/b/c`
`http://user@host/index`.relToAuth    => `/index`
`mailto:bob@bob.net`.relToAuth        => `bob@bob.net`
`/a/b/c/`.relToAuth                   => `/a/b/c/`
`logo.png`.relToAuth                  => `logo.png`
schemeSource

Str? scheme()

Return the scheme component or null if not absolute. The scheme is always normalized into lowercase.

Examples:

`http://foo/a/b/c`.scheme      =>  "http"
`HTTP://foo/a/b/c`.scheme      =>  "http"
`mailto:who@there.com`.scheme  =>  "mailto"
sliceSource

Uri slice(Range r)

Return a new Uri based on a slice of this Uri's path. If the range starts at zero, then the authority is included otherwise it is stripped and the result is not path absolute. If the range includes the last name in the path, then the query and fragment are included otherwise they are stripped and the result includes a trailing slash. The range can include negative indices to access from the end of the path. Also see pathOnly to create a slice without the authority, query, or fragment.

Examples:

`http://host/a/b/c?q`[0..-1]  =>  `http://host/a/b/c?q`
`http://host/a/b/c?q`[0..-2]  =>  `http://host/a/b/`
`http://host/a/b/c?q`[0..-3]  =>  `http://host/a/`
`http://host/a/b/c?q`[0..-4]  =>  `http://host/`
`http://host/a/b/c?q`[1..-1]  =>  `b/c?q`
`http://host/a/b/c?q`[2..-1]  =>  `c?q`
`http://host/a/b/c?q`[3..-1]  =>  `?q`
`/a/b/c/`[0..1]               =>  `/a/b/`
`/a/b/c/`[0..0]               =>  `/a/`
`/a/b/c/`[1..2]               =>  `b/c/`
`/a/b/c/`[1...2]              =>  `b/`
`/a`[0..-2]                   =>  `/`
sliceToPathAbsSource

Uri sliceToPathAbs(Range r)

Return a slice of this Uri's path using the same semantics as slice. However this method ensures that the result has a leading slash in the path such that isPathAbs returns true.

Examples:

`/a/b/c/`.sliceToPathAbs(0..1)  =>  `/a/b/`
`/a/b/c/`.sliceToPathAbs(1..2)  =>  `/b/c/`
`/a/b/c/`.sliceToPathAbs(1...2) =>  `/b/`
toFileSource

File toFile()

Convenience for File.make(this) - no guarantee is made that the file exists.

toStrSource

override Str toStr()

Overrides sys::Obj.toStr

Return normalized string representation.

userInfoSource

Str? userInfo()

User info is string information embedded in the authority using the "@" character. Its use is discouraged for security reasons.

Examples:

`http://brian:pass@host/`.userInfo  =>  "brian:pass"
`http://www.cool.com/`.userInfo     =>  null