GI.GLib.Structs.Uri

The Uri type and related functions can be used to parse URIs into their components, and build valid URIs from individual components.

Note that Uri scope is to help manipulate URIs in various applications, following RFC 3986. In particular, it doesn't intend to cover web browser needs, and doesn't implement the WHATWG URL standard. No APIs are provided to help prevent homograph attacks, so Uri is not suitable for formatting URIs for display to the user for making security-sensitive decisions.

## Relative and absolute URIs # {relative-absolute-uris}

As defined in RFC 3986, the hierarchical nature of URIs means that they can either be ‘relative references’ (sometimes referred to as ‘relative URIs’) or ‘URIs’ (for clarity, ‘URIs’ are referred to in this documentation as ‘absolute URIs’ — although in constrast to RFC 3986, fragment identifiers are always allowed).

Relative references have one or more components of the URI missing. In particular, they have no scheme. Any other component, such as hostname, query, etc. may be missing, apart from a path, which has to be specified (but may be empty). The path may be relative, starting with ./ rather than /.

For example, a valid relative reference is ./path?query, /?query#fragment or //example.com.

Absolute URIs have a scheme specified. Any other components of the URI which are missing are specified as explicitly unset in the URI, rather than being resolved relative to a base URI using uriParseRelative.

For example, a valid absolute URI is file:///home/bob or https://search.com?query=string.

A Uri instance is always an absolute URI. A string may be an absolute URI or a relative reference; see the documentation for individual functions as to what forms they accept.

Parsing URIs

The most minimalist APIs for parsing URIs are uriSplit and uriSplitWithUser. These split a URI into its component parts, and return the parts; the difference between the two is that uriSplit treats the ‘userinfo’ component of the URI as a single element, while uriSplitWithUser can (depending on the UriFlags you pass) treat it as containing a username, password, and authentication parameters. Alternatively, uriSplitNetwork can be used when you are only interested in the components that are needed to initiate a network connection to the service (scheme, host, and port).

uriParse is similar to uriSplit, but instead of returning individual strings, it returns a Uri structure (and it requires that the URI be an absolute URI).

uriResolveRelative and uriParseRelative allow you to resolve a relative URI relative to a base URI. uriResolveRelative takes two strings and returns a string, and uriParseRelative takes a Uri and a string and returns a Uri.

All of the parsing functions take a UriFlags argument describing exactly how to parse the URI; see the documentation for that type for more details on the specific flags that you can pass. If you need to choose different flags based on the type of URI, you can use uriPeekScheme on the URI string to check the scheme first, and use that to decide what flags to parse it with.

For example, you might want to use UriParamsFlagsWwwForm when parsing the params for a web URI, so compare the result of uriPeekScheme against http and https.

Building URIs

uriJoin and uriJoinWithUser can be used to construct valid URI strings from a set of component strings. They are the inverse of uriSplit and uriSplitWithUser.

Similarly, uriBuild and uriBuildWithUser can be used to construct a Uri from a set of component strings.

As with the parsing functions, the building functions take a UriFlags argument. In particular, it is important to keep in mind whether the URI components you are using are already %-encoded. If so, you must pass the UriFlagsEncoded flag.

file:// URIs

Note that Windows and Unix both define special rules for parsing file:// URIs (involving non-UTF-8 character sets on Unix, and the interpretation of path separators on Windows). Uri does not implement these rules. Use filenameFromUri and filenameToUri if you want to properly convert between file:// URIs and local filenames.

URI Equality

Note that there is no g_uri_equal () function, because comparing URIs usefully requires scheme-specific knowledge that Uri does not have. Uri can help with normalization if you use the various encoded UriFlags as well as UriFlagsSchemeNormalize however it is not comprehensive. For example, data:,foo and data:;base64,Zm9v resolve to the same thing according to the data: URI specification which GLib does not handle.

Since: 2.66

Exported types

newtype Uri

Memory-managed wrapper type.

Constructors

Uri (ManagedPtr Uri)

Instances

Eq Uri

Defined in GI.GLib.Structs.Uri

Methods

(==) :: Uri -> Uri -> Bool

(/=) :: Uri -> Uri -> Bool

GBoxed Uri

Defined in GI.GLib.Structs.Uri

ManagedPtrNewtype Uri

Defined in GI.GLib.Structs.Uri

Methods

toManagedPtr :: Uri -> ManagedPtr Uri

TypedObject Uri

Defined in GI.GLib.Structs.Uri

Methods

glibType :: IO GType

HasParentTypes Uri

Defined in GI.GLib.Structs.Uri

IsGValue (Maybe Uri)

Convert Uri to and from GValue. See toGValue and fromGValue.

Defined in GI.GLib.Structs.Uri

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Maybe Uri -> IO ()

gvalueGet_ :: Ptr GValue -> IO (Maybe Uri)

type ParentTypes Uri

Defined in GI.GLib.Structs.Uri

type ParentTypes Uri = '[] :: [Type]

Methods

Click to display all available methods, including inherited ones

Methods

parseRelative, toString, toStringPartial.

Getters

getAuthParams, getFlags, getFragment, getHost, getPassword, getPath, getPort, getQuery, getScheme, getUser, getUserinfo.

Setters

None.

build

uriBuild

Arguments

:: (HasCallStack, MonadIO m)

=> [UriFlags]

flags: flags describing how to build the Uri

-> Text

scheme: the URI scheme

-> Maybe Text

userinfo: the userinfo component, or Nothing

-> Maybe Text

host: the host component, or Nothing

-> Int32

port: the port, or -1

-> Text

path: the path component

-> Maybe Text

query: the query component, or Nothing

-> Maybe Text

fragment: the fragment, or Nothing

-> m Uri

Returns: a new Uri

Creates a new Uri from the given components according to flags.

See also uriBuildWithUser, which allows specifying the components of the "userinfo" separately.

Since: 2.66

buildWithUser

uriBuildWithUser

Arguments

:: (HasCallStack, MonadIO m)

=> [UriFlags]

flags: flags describing how to build the Uri

-> Text

scheme: the URI scheme

-> Maybe Text

user: the user component of the userinfo, or Nothing

-> Maybe Text

password: the password component of the userinfo, or Nothing

-> Maybe Text

authParams: the auth params of the userinfo, or Nothing

-> Maybe Text

host: the host component, or Nothing

-> Int32

port: the port, or -1

-> Text

path: the path component

-> Maybe Text

query: the query component, or Nothing

-> Maybe Text

fragment: the fragment, or Nothing

-> m Uri

Returns: a new Uri

Creates a new Uri from the given components according to flags (UriFlagsHasPassword is added unconditionally). The flags must be coherent with the passed values, in particular use %-encoded values with UriFlagsEncoded.

In contrast to uriBuild, this allows specifying the components of the ‘userinfo’ field separately. Note that user must be non-Nothing if either password or authParams is non-Nothing.

Since: 2.66

errorQuark

uriErrorQuark :: (HasCallStack, MonadIO m) => m Word32

No description available in the introspection data.

escapeBytes

uriEscapeBytes

Arguments

:: (HasCallStack, MonadIO m)

=> ByteString

unescaped: the unescaped input data.

-> Maybe Text

reservedCharsAllowed: a string of reserved characters that are allowed to be used, or Nothing.

-> m Text

Returns: an escaped version of unescaped. The returned string should be freed when no longer needed.

Escapes arbitrary data for use in a URI.

Normally all characters that are not ‘unreserved’ (i.e. ASCII alphanumerical characters plus dash, dot, underscore and tilde) are escaped. But if you specify characters in reservedCharsAllowed they are not escaped. This is useful for the ‘reserved’ characters in the URI specification, since those are allowed unescaped in some portions of a URI.

Though technically incorrect, this will also allow escaping nul bytes as %00.

Since: 2.66

escapeString

uriEscapeString

Arguments

:: (HasCallStack, MonadIO m)

=> Text

unescaped: the unescaped input string.

-> Maybe Text

reservedCharsAllowed: a string of reserved characters that are allowed to be used, or Nothing.

-> Bool

allowUtf8: True if the result can include UTF-8 characters.

-> m Text

Returns: an escaped version of unescaped. The returned string should be freed when no longer needed.

Escapes a string for use in a URI.

Normally all characters that are not "unreserved" (i.e. ASCII alphanumerical characters plus dash, dot, underscore and tilde) are escaped. But if you specify characters in reservedCharsAllowed they are not escaped. This is useful for the "reserved" characters in the URI specification, since those are allowed unescaped in some portions of a URI.

Since: 2.16

getAuthParams

uriGetAuthParams

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

uri: a Uri

-> m (Maybe Text)

Returns: uri's authentication parameters.

Gets uri's authentication parameters, which may contain %-encoding, depending on the flags with which uri was created. (If uri was not created with UriFlagsHasAuthParams then this will be Nothing.)

Depending on the URI scheme, uriParseParams may be useful for further parsing this information.

Since: 2.66

getFlags

uriGetFlags

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

uri: a Uri

-> m [UriFlags]

Returns: uri's flags.

Gets uri's flags set upon construction.

Since: 2.66

getFragment

uriGetFragment

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

uri: a Uri

-> m (Maybe Text)

Returns: uri's fragment.

Gets uri's fragment, which may contain %-encoding, depending on the flags with which uri was created.

Since: 2.66

getHost

uriGetHost

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

uri: a Uri

-> m (Maybe Text)

Returns: uri's host.

Gets uri's host. This will never have %-encoded characters, unless it is non-UTF-8 (which can only be the case if uri was created with UriFlagsNonDns).

If uri contained an IPv6 address literal, this value will be just that address, without the brackets around it that are necessary in the string form of the URI. Note that in this case there may also be a scope ID attached to the address. Eg, fe80::1234%em1 (or fe80::1234%25em1 if the string is still encoded).

Since: 2.66

getPassword

uriGetPassword

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

uri: a Uri

-> m (Maybe Text)

Returns: uri's password.

Gets uri's password, which may contain %-encoding, depending on the flags with which uri was created. (If uri was not created with UriFlagsHasPassword then this will be Nothing.)

Since: 2.66

getPath

uriGetPath

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

uri: a Uri

-> m Text

Returns: uri's path.

Gets uri's path, which may contain %-encoding, depending on the flags with which uri was created.

Since: 2.66

getPort

uriGetPort

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

uri: a Uri

-> m Int32

Returns: uri's port, or -1 if no port was specified.

Gets uri's port.

Since: 2.66

getQuery

uriGetQuery

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

uri: a Uri

-> m (Maybe Text)

Returns: uri's query.

Gets uri's query, which may contain %-encoding, depending on the flags with which uri was created.

For queries consisting of a series of name=value parameters, UriParamsIter or uriParseParams may be useful.

Since: 2.66

getScheme

uriGetScheme

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

uri: a Uri

-> m Text

Returns: uri's scheme.

Gets uri's scheme. Note that this will always be all-lowercase, regardless of the string or strings that uri was created from.

Since: 2.66

getUser

uriGetUser

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

uri: a Uri

-> m (Maybe Text)

Returns: uri's user.

Gets the ‘username’ component of uri's userinfo, which may contain %-encoding, depending on the flags with which uri was created. If uri was not created with UriFlagsHasPassword or UriFlagsHasAuthParams, this is the same as uriGetUserinfo.

Since: 2.66

getUserinfo

uriGetUserinfo

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

uri: a Uri

-> m (Maybe Text)

Returns: uri's userinfo.

Gets uri's userinfo, which may contain %-encoding, depending on the flags with which uri was created.

Since: 2.66

isValid

uriIsValid

Arguments

:: (HasCallStack, MonadIO m)

=> Text

uriString: a string containing an absolute URI

-> [UriFlags]

flags: flags for parsing uriString

-> m ()

(Can throw GError)

Parses uriString according to flags, to determine whether it is a valid [absolute URI][relative-absolute-uris], i.e. it does not need to be resolved relative to another URI using uriParseRelative.

If it’s not a valid URI, an error is returned explaining how it’s invalid.

See uriSplit, and the definition of UriFlags, for more information on the effect of flags.

Since: 2.66

join

uriJoin

Arguments

:: (HasCallStack, MonadIO m)

=> [UriFlags]

flags: flags describing how to build the URI string

-> Maybe Text

scheme: the URI scheme, or Nothing

-> Maybe Text

userinfo: the userinfo component, or Nothing

-> Maybe Text

host: the host component, or Nothing

-> Int32

port: the port, or -1

-> Text

path: the path component

-> Maybe Text

query: the query component, or Nothing

-> Maybe Text

fragment: the fragment, or Nothing

-> m Text

Returns: an absolute URI string

Joins the given components together according to flags to create an absolute URI string. path may not be Nothing (though it may be the empty string).

When host is present, path must either be empty or begin with a slash (/) character. When host is not present, path cannot begin with two slash characters (//). See RFC 3986, section 3.

See also uriJoinWithUser, which allows specifying the components of the ‘userinfo’ separately.

UriFlagsHasPassword and UriFlagsHasAuthParams are ignored if set in flags.

Since: 2.66

joinWithUser

uriJoinWithUser

Arguments

:: (HasCallStack, MonadIO m)

=> [UriFlags]

flags: flags describing how to build the URI string

-> Maybe Text

scheme: the URI scheme, or Nothing

-> Maybe Text

user: the user component of the userinfo, or Nothing

-> Maybe Text

password: the password component of the userinfo, or Nothing

-> Maybe Text

authParams: the auth params of the userinfo, or Nothing

-> Maybe Text

host: the host component, or Nothing

-> Int32

port: the port, or -1

-> Text

path: the path component

-> Maybe Text

query: the query component, or Nothing

-> Maybe Text

fragment: the fragment, or Nothing

-> m Text

Returns: an absolute URI string

Joins the given components together according to flags to create an absolute URI string. path may not be Nothing (though it may be the empty string).

In contrast to uriJoin, this allows specifying the components of the ‘userinfo’ separately. It otherwise behaves the same.

UriFlagsHasPassword and UriFlagsHasAuthParams are ignored if set in flags.

Since: 2.66

listExtractUris

uriListExtractUris

Arguments

:: (HasCallStack, MonadIO m)

=> Text

uriList: an URI list

-> m [Text]

Returns: a newly allocated Nothing-terminated list of strings holding the individual URIs. The array should be freed with strfreev.

Splits an URI list conforming to the text/uri-list mime type defined in RFC 2483 into individual URIs, discarding any comments. The URIs are not validated.

Since: 2.6

parse

uriParse

Arguments

:: (HasCallStack, MonadIO m)

=> Text

uriString: a string representing an absolute URI

-> [UriFlags]

flags: flags describing how to parse uriString

-> m Uri

Returns: a new Uri, or NULL on error. (Can throw GError)

Parses uriString according to flags. If the result is not a valid [absolute URI][relative-absolute-uris], it will be discarded, and an error returned.

Since: 2.66

parseParams

uriParseParams

Arguments

:: (HasCallStack, MonadIO m)

=> Text

params: a %-encoded string containing attribute=value parameters

-> Int64

length: the length of params, or -1 if it is nul-terminated

-> Text

separators: the separator byte character set between parameters. (usually &, but sometimes ; or both &;). Note that this function works on bytes not characters, so it can't be used to delimit UTF-8 strings for anything but ASCII characters. You may pass an empty set, in which case no splitting will occur.

-> [UriParamsFlags]

flags: flags to modify the way the parameters are handled.

-> m (Map Text Text)

Returns: A hash table of attribute/value pairs, with both names and values fully-decoded; or Nothing on error. (Can throw GError)

Many URI schemes include one or more attribute/value pairs as part of the URI value. This method can be used to parse them into a hash table. When an attribute has multiple occurrences, the last value is the final returned value. If you need to handle repeated attributes differently, use UriParamsIter.

The params string is assumed to still be %-encoded, but the returned values will be fully decoded. (Thus it is possible that the returned values may contain = or separators, if the value was encoded in the input.) Invalid %-encoding is treated as with the UriFlagsParseRelaxed rules for uriParse. (However, if params is the path or query string from a Uri that was parsed without UriFlagsParseRelaxed and UriFlagsEncoded, then you already know that it does not contain any invalid encoding.)

UriParamsFlagsWwwForm is handled as documented for uriParamsIterInit.

If UriParamsFlagsCaseInsensitive is passed to flags, attributes will be compared case-insensitively, so a params string attr=123&Attr=456 will only return a single attribute–value pair, Attr=456. Case will be preserved in the returned attributes.

If params cannot be parsed (for example, it contains two separators characters in a row), then error is set and Nothing is returned.

Since: 2.66

parseRelative

uriParseRelative

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

baseUri: a base absolute URI

-> Text

uriRef: a string representing a relative or absolute URI

-> [UriFlags]

flags: flags describing how to parse uriRef

-> m Uri

Returns: a new Uri, or NULL on error. (Can throw GError)

Parses uriRef according to flags and, if it is a [relative URI][relative-absolute-uris], resolves it relative to baseUri. If the result is not a valid absolute URI, it will be discarded, and an error returned.

Since: 2.66

parseScheme

uriParseScheme

Arguments

:: (HasCallStack, MonadIO m)

=> Text

uri: a valid URI.

-> m (Maybe Text)

Returns: The ‘scheme’ component of the URI, or Nothing on error. The returned string should be freed when no longer needed.

Gets the scheme portion of a URI string. RFC 3986 decodes the scheme as: > >URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ]

Common schemes include file, https, svn+ssh, etc.

Since: 2.16

peekScheme

uriPeekScheme

Arguments

:: (HasCallStack, MonadIO m)

=> Text

uri: a valid URI.

-> m (Maybe Text)

Returns: The ‘scheme’ component of the URI, or Nothing on error. The returned string is normalized to all-lowercase, and interned via internString, so it does not need to be freed.

Gets the scheme portion of a URI string. RFC 3986 decodes the scheme as: > >URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ]

Common schemes include file, https, svn+ssh, etc.

Unlike uriParseScheme, the returned scheme is normalized to all-lowercase and does not need to be freed.

Since: 2.66

resolveRelative

uriResolveRelative

Arguments

:: (HasCallStack, MonadIO m)

=> Maybe Text

baseUriString: a string representing a base URI

-> Text

uriRef: a string representing a relative or absolute URI

-> [UriFlags]

flags: flags describing how to parse uriRef

-> m Text

Returns: the resolved URI string, or NULL on error. (Can throw GError)

Parses uriRef according to flags and, if it is a [relative URI][relative-absolute-uris], resolves it relative to baseUriString. If the result is not a valid absolute URI, it will be discarded, and an error returned.

(If baseUriString is Nothing, this just returns uriRef, or Nothing if uriRef is invalid or not absolute.)

Since: 2.66

split

uriSplit

Arguments

:: (HasCallStack, MonadIO m)

=> Text

uriRef: a string containing a relative or absolute URI

-> [UriFlags]

flags: flags for parsing uriRef

-> m (Maybe Text, Maybe Text, Maybe Text, Int32, Text, Maybe Text, Maybe Text)

(Can throw GError)

Parses uriRef (which can be an [absolute or relative URI][relative-absolute-uris]) according to flags, and returns the pieces. Any component that doesn't appear in uriRef will be returned as Nothing (but note that all URIs always have a path component, though it may be the empty string).

If flags contains UriFlagsEncoded, then %-encoded characters in uriRef will remain encoded in the output strings. (If not, then all such characters will be decoded.) Note that decoding will only work if the URI components are ASCII or UTF-8, so you will need to use UriFlagsEncoded if they are not.

Note that the UriFlagsHasPassword and UriFlagsHasAuthParams flags are ignored by uriSplit, since it always returns only the full userinfo; use uriSplitWithUser if you want it split up.

Since: 2.66

splitNetwork

uriSplitNetwork

Arguments

:: (HasCallStack, MonadIO m)

=> Text

uriString: a string containing an absolute URI

-> [UriFlags]

flags: flags for parsing uriString

-> m (Maybe Text, Maybe Text, Int32)

(Can throw GError)

Parses uriString (which must be an [absolute URI][relative-absolute-uris]) according to flags, and returns the pieces relevant to connecting to a host. See the documentation for uriSplit for more details; this is mostly a wrapper around that function with simpler arguments. However, it will return an error if uriString is a relative URI, or does not contain a hostname component.

Since: 2.66

splitWithUser

uriSplitWithUser

Arguments

:: (HasCallStack, MonadIO m)

=> Text

uriRef: a string containing a relative or absolute URI

-> [UriFlags]

flags: flags for parsing uriRef

-> m (Maybe Text, Maybe Text, Maybe Text, Maybe Text, Maybe Text, Int32, Text, Maybe Text, Maybe Text)

(Can throw GError)

Parses uriRef (which can be an [absolute or relative URI][relative-absolute-uris]) according to flags, and returns the pieces. Any component that doesn't appear in uriRef will be returned as Nothing (but note that all URIs always have a path component, though it may be the empty string).

See uriSplit, and the definition of UriFlags, for more information on the effect of flags. Note that password will only be parsed out if flags contains UriFlagsHasPassword, and authParams will only be parsed out if flags contains UriFlagsHasAuthParams.

Since: 2.66

toString

uriToString

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

uri: a Uri

-> m Text

Returns: a string representing uri, which the caller must free.

Returns a string representing uri.

This is not guaranteed to return a string which is identical to the string that uri was parsed from. However, if the source URI was syntactically correct (according to RFC 3986), and it was parsed with UriFlagsEncoded, then uriToString is guaranteed to return a string which is at least semantically equivalent to the source URI (according to RFC 3986).

If uri might contain sensitive details, such as authentication parameters, or private data in its query string, and the returned string is going to be logged, then consider using uriToStringPartial to redact parts.

Since: 2.66

toStringPartial

uriToStringPartial

Arguments

:: (HasCallStack, MonadIO m)

=> Uri

uri: a Uri

-> [UriHideFlags]

flags: flags describing what parts of uri to hide

-> m Text

Returns: a string representing uri, which the caller must free.

Returns a string representing uri, subject to the options in flags. See uriToString and UriHideFlags for more details.

Since: 2.66

unescapeBytes

uriUnescapeBytes

Arguments

:: (HasCallStack, MonadIO m)

=> Text

escapedString: A URI-escaped string

-> Int64

length: the length (in bytes) of escapedString to escape, or -1 if it is nul-terminated.

-> Maybe Text

illegalCharacters: a string of illegal characters not to be allowed, or Nothing.

-> m Bytes

Returns: an unescaped version of escapedString or Nothing on error (if decoding failed, using UriErrorFailed error code). The returned Bytes should be unreffed when no longer needed. (Can throw GError)

Unescapes a segment of an escaped string as binary data.

Note that in contrast to uriUnescapeString, this does allow nul bytes to appear in the output.

If any of the characters in illegalCharacters appears as an escaped character in escapedString, then that is an error and Nothing will be returned. This is useful if you want to avoid for instance having a slash being expanded in an escaped path element, which might confuse pathname handling.

Since: 2.66

unescapeSegment

uriUnescapeSegment

Arguments

:: (HasCallStack, MonadIO m)

=> Maybe Text

escapedString: A string, may be Nothing

-> Maybe Text

escapedStringEnd: Pointer to end of escapedString, may be Nothing

-> Maybe Text

illegalCharacters: An optional string of illegal characters not to be allowed, may be Nothing

-> m (Maybe Text)

Returns: an unescaped version of escapedString, or Nothing on error. The returned string should be freed when no longer needed. As a special case if Nothing is given for escapedString, this function will return Nothing.

Unescapes a segment of an escaped string.

If any of the characters in illegalCharacters or the NUL character appears as an escaped character in escapedString, then that is an error and Nothing will be returned. This is useful if you want to avoid for instance having a slash being expanded in an escaped path element, which might confuse pathname handling.

Note: NUL byte is not accepted in the output, in contrast to uriUnescapeBytes.

Since: 2.16

unescapeString

uriUnescapeString

Arguments

:: (HasCallStack, MonadIO m)

=> Text

escapedString: an escaped string to be unescaped.

-> Maybe Text

illegalCharacters: a string of illegal characters not to be allowed, or Nothing.

-> m (Maybe Text)

Returns: an unescaped version of escapedString. The returned string should be freed when no longer needed.

Unescapes a whole escaped string.

If any of the characters in illegalCharacters or the NUL character appears as an escaped character in escapedString, then that is an error and Nothing will be returned. This is useful if you want to avoid for instance having a slash being expanded in an escaped path element, which might confuse pathname handling.

Since: 2.16