struct HTTP::Params
Overview
Represents a collection of http parameters and their respective values.
Included Modules
- Enumerable({String, String})
Defined in:
http/params.crClass Method Summary
-
.build(&block : Builder -> ) : String
Builds an url-encoded HTTP form/query.
-
.from_hash(hash : Hash)
Creates an
HTTP::Params
instance from the key-value pairs of the given hash. - .new(raw_params : Hash(String, Array(String)))
-
.parse(query : String) : self
Parses an HTTP query string into a
HTTP::Params
-
.parse(query : String, &block)
Parses an HTTP query and yields each key-value pair.
Instance Method Summary
- #==(other : self)
- #==(other)
-
#[](name)
Returns first value for specified param name.
-
#[]=(name, value)
Sets first value for specified param name.
-
#[]?(name)
Returns first value or
nil
for specified param name. -
#add(name, value)
Appends new value for specified param name.
-
#delete(name)
Deletes first value for provided param name.
-
#delete_all(name)
Deletes all values for provided param name.
-
#each(&block)
Allows to iterate over all name-value pairs.
-
#fetch(name, &block)
Returns first value for specified param name.
-
#fetch(name)
Returns first value for specified param name.
-
#fetch(name, default)
Returns first value for specified param name.
-
#fetch_all(name)
Returns all values for specified param name.
-
#has_key?(*args, **options, &block)
Returns
true
if param with provided name exists. -
#has_key?(*args, **options)
Returns
true
if param with provided name exists. -
#set_all(name, values)
Sets all values for specified param name at once.
-
#to_s(io)
Serializes to string representation as http url-encoded form.
Instance methods inherited from module Enumerable({String, String})
all?(&block)all? all?, any?(&block)
any? any?, chunks(&block : {String, String} -> U) forall U chunks, compact_map(&block) compact_map, count(&block)
count(item) count, cycle(n, &block)
cycle(&block) cycle, each(&block : {String, String} -> _) each, each_cons(count : Int, reuse = false, &block) each_cons, each_slice(count : Int, reuse = false, &block) each_slice, each_with_index(offset = 0, &block) each_with_index, each_with_object(obj, &block) each_with_object, find(if_none = nil, &block) find, first(count : Int)
first first, first? first?, flat_map(&block : {String, String} -> Array(U) | Iterator(U) | U) forall U flat_map, grep(pattern) grep, group_by(&block : {String, String} -> U) forall U group_by, in_groups_of(size : Int, filled_up_with : U = nil) forall U
in_groups_of(size : Int, filled_up_with : U = nil, reuse = false, &block) forall U in_groups_of, includes?(obj) includes?, index(&block)
index(obj) index, index_by(&block : {String, String} -> U) forall U index_by, join(separator, io)
join(separator = "")
join(separator, io, &block)
join(separator = "", &block) join, map(&block : {String, String} -> U) forall U map, map_with_index(&block : {String, String}, Int32 -> U) forall U map_with_index, max max, max? max?, max_by(&block : {String, String} -> U) forall U max_by, max_by?(&block : {String, String} -> U) forall U max_by?, max_of(&block : {String, String} -> U) forall U max_of, max_of?(&block : {String, String} -> U) forall U max_of?, min min, min? min?, min_by(&block : {String, String} -> U) forall U min_by, min_by?(&block : {String, String} -> U) forall U min_by?, min_of(&block : {String, String} -> U) forall U min_of, min_of?(&block : {String, String} -> U) forall U min_of?, minmax minmax, minmax? minmax?, minmax_by(&block : {String, String} -> U) forall U minmax_by, minmax_by?(&block : {String, String} -> U) forall U minmax_by?, minmax_of(&block : {String, String} -> U) forall U minmax_of, minmax_of?(&block : {String, String} -> U) forall U minmax_of?, none?(&block)
none? none?, one?(&block) one?, partition(&block) partition, product(&block)
product(initial : Number, &block)
product
product(initial : Number) product, reduce(&block)
reduce(memo, &block) reduce, reject(&block : {String, String} -> ) reject, select(&block : {String, String} -> ) select, size size, skip(count : Int) skip, skip_while(&block) skip_while, sum(initial)
sum
sum(initial, &block)
sum(&block) sum, take_while(&block) take_while, to_a to_a, to_h to_h, to_set to_set
Instance methods inherited from struct Struct
==(other : self) : Bool
==,
hash : Int32
hash,
inspect(io : IO) : Nil
inspect,
pretty_print(pp) : Nil
pretty_print,
to_s(io)
to_s
Instance methods inherited from struct Value
==(other)
==,
dup
dup
Instance methods inherited from class Object
!=(other)
!=,
!~(other)
!~,
==(other)
==,
===(other : JSON::Any)===(other : YAML::Any)
===(other) ===, =~(other) =~, class class, dup dup, hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, tap(&block) tap, to_json(io : IO)
to_json to_json, to_pretty_json(indent : String = " ")
to_pretty_json(io : IO, indent : String = " ") to_pretty_json, to_s
to_s(io : IO) to_s, to_yaml(io : IO)
to_yaml to_yaml, try(&block) try
Class methods inherited from class Object
from_json(string_or_io, root : String) : selffrom_json(string_or_io) : self from_json, from_yaml(string_or_io) : self from_yaml
Class Method Detail
Builds an url-encoded HTTP form/query.
The yielded object has an #add
method that accepts two arguments,
a key (String
) and a value (String
or Nil
).
Keys and values are escaped using URI#escape
.
params = HTTP::Params.build do |form|
form.add "color", "black"
form.add "name", "crystal"
form.add "year", "2012 - today"
end
params # => "color=black&name=crystal&year=2012+-+today"
Creates an HTTP::Params
instance from the key-value
pairs of the given hash.
Parses an HTTP query string into a HTTP::Params
HTTP::Params.parse("foo=bar&foo=baz&qux=zoo")
# => #<HTTP::Params @raw_params = {"foo" => ["bar", "baz"], "qux" => ["zoo"]}>
Parses an HTTP query and yields each key-value pair.
query = "foo=bar&foo=baz&qux=zoo"
HTTP::Params.parse(query) do |key, value|
# ...
end
Instance Method Detail
Returns first value for specified param name.
params = HTTP::Params.parse("email=john@example.org")
params["email"] # => "john@example.org"
params["non_existent_param"] # KeyError
Returns first value or nil
for specified param name.
params["email"]? # => "john@example.org"
params["non_existent_param"]? # nil
Appends new value for specified param name. Creates param when there was no such param.
params.add("item", "keychain")
params.fetch_all("item") # => ["pencil", "book", "workbook", "keychain"]
Deletes first value for provided param name. If there are no values left, deletes param itself. Returns deleted value.
params.delete("item") # => "keychain"
params.fetch_all("item") # => ["keynote"]
params.delete("item") # => "keynote"
params["item"] # KeyError
params.delete("non_existent_param") # KeyError
Deletes all values for provided param name. Returns array of deleted values.
params.set_all("comments", ["hello, world!", ":+1:"])
params.delete_all("comments") # => ["hello, world!", ":+1:"]
params.has_key?("comments") # => false
Allows to iterate over all name-value pairs.
params.each do |name, value|
puts "#{name} => #{value}"
end
# Outputs:
# email => john@example.org
# item => keychain
# item => keynote
Returns first value for specified param name. Fallbacks to return value of provided block when there is no such param.
params.fetch("email") { raise "Email is missing" } # raises "Email is missing"
params.fetch("non_existent_param") { "default computed value" } # => "default computed value"
Returns first value for specified param name.
params.fetch("email") # => "john@example.org"
params.fetch("non_existent_param") # KeyError
Returns first value for specified param name. Fallbacks to provided default value when there is no such param.
params.fetch("email", "none@example.org") # => "john@example.org"
params.fetch("non_existent_param", "default value") # => "default value"
Returns all values for specified param name.
params.set_all("item", ["pencil", "book", "workbook"])
params.fetch_all("item") # => ["pencil", "book", "workbook"]
Returns true
if param with provided name exists.
params.has_key?("email") # => true
params.has_key?("garbage") # => false
Returns true
if param with provided name exists.
params.has_key?("email") # => true
params.has_key?("garbage") # => false
Sets all values for specified param name at once.
params.set_all("item", ["keychain", "keynote"])
params.fetch_all("item") # => ["keychain", "keynote"]