Specs

char_reserved?(byte()) :: boolean()

Checks if character is a reserved one in a URI.

As specified in RFC 3986, section 2.2, the following characters are reserved: :, /, ?, #, [, ], @, !, $, &, ', (, ), *, +, ,, ;, =

Examples

iex> URI.char_reserved?(?+)
true

Specs

char_unescaped?(byte()) :: boolean()

Checks if character is allowed unescaped in a URI.

This is the default used by URI.encode/2 where both reserved and unreserved characters are kept unescaped.

Examples

iex> URI.char_unescaped?(?{)
false

Specs

char_unreserved?(byte()) :: boolean()

Checks if character is an unreserved one in a URI.

As specified in RFC 3986, section 2.3, the following characters are unreserved:

• Alphanumeric characters: A-Z, a-z, 0-9
• ~, _, -

Examples

iex> URI.char_unreserved?(?_)
true

Specs

decode(binary()) :: binary()

Percent-unescapes a URI.

Examples

iex> URI.decode("https%3A%2F%2Felixir-lang.org")
"https://elixir-lang.org"

Specs

decode_query(binary(), %{optional(binary()) => binary()}) :: %{
  optional(binary()) => binary()
}

Decodes a query string into a map.

Given a query string in the form of key1=value1&key2=value2..., this function inserts each key-value pair in the query string as one entry in the given map. Keys and values in the resulting map will be binaries. Keys and values will be percent-unescaped.

Use query_decoder/1 if you want to iterate over each value manually.

Examples

iex> URI.decode_query("foo=1&bar=2")
%{"bar" => "2", "foo" => "1"}

iex> URI.decode_query("percent=oh+yes%21", %{"starting" => "map"})
%{"percent" => "oh yes!", "starting" => "map"}

Specs

decode_www_form(binary()) :: binary()

Decodes string as "x-www-form-urlencoded".

Examples

iex> URI.decode_www_form("%3Call+in%2F")
"<all in/"

Specs

default_port(binary()) :: nil | non_neg_integer()

Returns the default port for a given scheme.

If the scheme is unknown to the URI module, this function returns nil. The default port for any scheme can be configured globally via default_port/2.

Examples

iex> URI.default_port("ftp")
21

iex> URI.default_port("ponzi")
nil

Specs

default_port(binary(), non_neg_integer()) :: :ok

Registers the default port for the given scheme.

After this function is called, port will be returned by default_port/1 for the given scheme scheme. Note that this function changes the default port for the given scheme globally, meaning for every application.

It is recommended for this function to be invoked in your application's start callback in case you want to register new URIs.

Specs

encode(binary(), (byte() -> as_boolean(term()))) :: binary()

Percent-escapes all characters that require escaping in string.

This means reserved characters, such as : and /, and the so-called unreserved characters, which have the same meaning both escaped and unescaped, won't be escaped by default.

See encode_www_form if you are interested in escaping reserved characters too.

This function also accepts a predicate function as an optional argument. If passed, this function will be called with each byte in string as its argument and should return a truthy value (anything other than false or nil) if the given byte should be left as is, or return a falsy value (false or nil) if the character should be escaped.

Examples

iex> URI.encode("ftp://s-ite.tld/?value=put it+й")
"ftp://s-ite.tld/?value=put%20it+%D0%B9"

iex> URI.encode("a string", &(&1 != ?i))
"a str%69ng"

Specs

encode_query(Enum.t()) :: binary()

Encodes an enumerable into a query string.

Takes an enumerable that enumerates as a list of two-element tuples (e.g., a map or a keyword list) and returns a string in the form of key1=value1&key2=value2... where keys and values are URL encoded as per encode_www_form/1.

Keys and values can be any term that implements the String.Chars protocol with the exception of lists, which are explicitly forbidden.

Examples

iex> hd = %{"foo" => 1, "bar" => 2}
iex> URI.encode_query(hd)
"bar=2&foo=1"

iex> query = %{"key" => "value with spaces"}
iex> URI.encode_query(query)
"key=value+with+spaces"

iex> URI.encode_query(%{key: [:a, :list]})
** (ArgumentError) encode_query/1 values cannot be lists, got: [:a, :list]

Specs

encode_www_form(binary()) :: binary()

Encodes string as "x-www-form-urlencoded".

Example

iex> URI.encode_www_form("put: it+й")
"put%3A+it%2B%D0%B9"

Specs

merge(t() | binary(), t() | binary()) :: t()

Merges two URIs.

This function merges two URIs as per RFC 3986, section 5.2.

Examples

iex> URI.merge(URI.parse("http://google.com"), "/query") |> to_string()
"http://google.com/query"

iex> URI.merge("http://example.com", "http://google.com") |> to_string()
"http://google.com"

Specs

parse(t() | binary()) :: t()

Parses a well-formed URI reference into its components.

Note this function expects a well-formed URI and does not perform any validation. See the "Examples" section below for examples of how URI.parse/1 can be used to parse a wide range of URIs.

This function uses the parsing regular expression as defined in RFC 3986, Appendix B.

When a URI is given without a port, the value returned by URI.default_port/1 for the URI's scheme is used for the :port field.

If a %URI{} struct is given to this function, this function returns it unmodified.

Examples

iex> URI.parse("https://elixir-lang.org/")
%URI{
  authority: "elixir-lang.org",
  fragment: nil,
  host: "elixir-lang.org",
  path: "/",
  port: 443,
  query: nil,
  scheme: "https",
  userinfo: nil
}

iex> URI.parse("//elixir-lang.org/")
%URI{
  authority: "elixir-lang.org",
  fragment: nil,
  host: "elixir-lang.org",
  path: "/",
  port: nil,
  query: nil,
  scheme: nil,
  userinfo: nil
}

iex> URI.parse("/foo/bar")
%URI{
  authority: nil,
  fragment: nil,
  host: nil,
  path: "/foo/bar",
  port: nil,
  query: nil,
  scheme: nil,
  userinfo: nil
}

iex> URI.parse("foo/bar")
%URI{
  authority: nil,
  fragment: nil,
  host: nil,
  path: "foo/bar",
  port: nil,
  query: nil,
  scheme: nil,
  userinfo: nil
}

Specs

query_decoder(binary()) :: Enumerable.t()

Returns a stream of two-element tuples representing key-value pairs in the given query.

Key and value in each tuple will be binaries and will be percent-unescaped.

Examples

iex> URI.query_decoder("foo=1&bar=2") |> Enum.to_list()
[{"foo", "1"}, {"bar", "2"}]

iex> URI.query_decoder("food=bread%26butter&drinks=tap%20water") |> Enum.to_list()
[{"food", "bread&butter"}, {"drinks", "tap water"}]

Specs

to_string(t()) :: binary()

Returns the string representation of the given URI struct.

Examples

iex> URI.to_string(URI.parse("http://google.com"))
"http://google.com"

iex> URI.to_string(%URI{scheme: "foo", host: "bar.baz"})
"foo://bar.baz"

Note that when creating this string representation, the :authority value will be used if the :host is nil. Otherwise, the :userinfo, :host, and :port will be used.

iex> URI.to_string(%URI{authority: "foo@example.com:80"})
"//foo@example.com:80"

iex> URI.to_string(%URI{userinfo: "bar", host: "example.org", port: 81})
"//bar@example.org:81"

iex> URI.to_string(%URI{
...>   authority: "foo@example.com:80",
...>   userinfo: "bar",
...>   host: "example.org",
...>   port: 81
...> })
"//bar@example.org:81"