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This commit is contained in:
Omar Roth 2019-10-26 11:16:05 -04:00
parent 174a36f4ad
commit a7f2c4fbea
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5 changed files with 520 additions and 233 deletions
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2
shard.yml
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@ -1,5 +1,5 @@
name: protodec
version: 0.1.0
version: 0.1.1
authors:
- Omar Roth <omarroth@protonmail.com>

29
spec/protodec_spec.cr Normal file
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@ -0,0 +1,29 @@
require "./spec_helper"
describe Protodec do
it "decodes Base64 data" do
input = "4qmFsgIrEhhVQ0NqOTU2SUY2MkZiVDdHb3VzemFqOXcaD0VnbGpiMjF0ZFc1cGRIaw"
output = input.strip
.try { |i| URI.decode_www_form(i) }
.try { |i| URI.decode_www_form(i) }
.try { |i| Base64.decode(i) }
.try { |i| IO::Memory.new(i) }
.try { |i| Protodec::Any.parse(i) }
output["80226972:0:embedded"]["2:0:string"].should eq("UCCj956IF62FbT7Gouszaj9w")
output["80226972:0:embedded"]["3:1:base64"]["2:0:string"].should eq("community")
end
it "encodes JSON object" do
object = Protodec::Any.cast_json({
"80226972:0:embedded" => {
"2:0:string" => "UCCj956IF62FbT7Gouszaj9w",
"3:1:base64" => {
"2:0:string" => "community",
},
},
})
Base64.urlsafe_encode(Protodec::Any.from_json(object), padding: false).should eq("4qmFsgIrEhhVQ0NqOTU2SUY2MkZiVDdHb3VzemFqOXcaD0VnbGpiMjF0ZFc1cGRIaw")
end
end

2
spec/spec_helper.cr Normal file
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@ -0,0 +1,2 @@
require "spec"
require "../src/protodec/utils"

239
src/protodec.cr
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@ -14,10 +14,8 @@
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
require "base64"
require "json"
require "option_parser"
require "uri"
require "./protodec/utils"
CURRENT_BRANCH = {{ "#{`git branch | sed -n '/\* /s///p'`.strip}" }}
CURRENT_COMMIT = {{ "#{`git rev-list HEAD --max-count=1 --abbrev-commit`.strip}" }}
@ -29,229 +27,6 @@ SOFTWARE = {
"branch" => "#{CURRENT_BRANCH}",
}
struct VarLong
def self.from_io(io : IO, format = IO::ByteFormat::NetworkEndian) : Int64
result = 0_i64
num_read = 0
loop do
byte = io.read_byte
raise "Invalid VarLong" if !byte
value = byte & 0x7f
result |= value.to_i64 << (7 * num_read)
num_read += 1
break if byte & 0x80 == 0
raise "Invalid VarLong" if num_read > 10
end
result
end
def self.to_io(io : IO, value : Int64)
io.write_byte 0x00 if value == 0x00
value = value.to_u64!
while value != 0
byte = (value & 0x7f).to_u8!
value >>= 7
if value != 0
byte |= 0x80
end
io.write_byte byte
end
end
end
struct ProtoBuf::Any
enum Tag
VarInt = 0
Bit64 = 1
LengthDelimited = 2
Bit32 = 5
end
TAG_MAP = {
"varint" => 0,
"float32" => 5,
"int32" => 5,
"float64" => 1,
"int64" => 1,
"string" => 2,
"embedded" => 2,
"base64" => 2,
"bytes" => 2,
}
alias Type = Int64 |
Float64 |
Array(UInt8) |
String |
Hash(String, Type)
getter raw : Type
def initialize(@raw : Type)
end
def self.parse(io : IO)
from_io(io, ignore_exceptions: true)
end
def self.from_io(io : IO, format = IO::ByteFormat::NetworkEndian, ignore_exceptions = false)
item = new({} of String => Type)
index = 0
begin
until io.pos == io.size
header = io.read_bytes(VarLong)
field = (header >> 3).to_i
type = Tag.new((header & 0b111).to_i)
case type
when Tag::VarInt
value = io.read_bytes(VarLong)
key = "#{field}:#{index}:varint"
when Tag::Bit32
value = io.read_bytes(Int32)
bytes = IO::Memory.new
value.to_io(bytes, IO::ByteFormat::LittleEndian)
bytes.rewind
begin
value = bytes.read_bytes(Float32, format: IO::ByteFormat::LittleEndian).to_f64
key = "#{field}:#{index}:float32"
rescue ex
value = value.to_i64
key = "#{field}:#{index}:int32"
end
when Tag::Bit64
value = io.read_bytes(Int64)
bytes = IO::Memory.new
value.to_io(bytes, IO::ByteFormat::LittleEndian)
bytes.rewind
begin
value = bytes.read_bytes(Float64, format: IO::ByteFormat::LittleEndian)
key = "#{field}:#{index}:float64"
rescue ex
key = "#{field}:#{index}:int64"
end
when Tag::LengthDelimited
size = io.read_bytes(VarLong)
raise "Invalid size" if size > 2**22
bytes = Bytes.new(size)
io.read_fully(bytes)
value = String.new(bytes)
if value.empty?
value = ""
key = "#{field}:#{index}:string"
elsif value.valid_encoding? && !value.codepoints.any? { |codepoint|
(0x00..0x1f).includes?(codepoint) &&
!{0x09, 0x0a, 0x0d}.includes?(codepoint)
}
begin
value = from_io(IO::Memory.new(Base64.decode(URI.decode_www_form(URI.decode_www_form(value))))).raw
key = "#{field}:#{index}:base64"
rescue ex
key = "#{field}:#{index}:string"
end
else
begin
value = from_io(IO::Memory.new(bytes)).raw
key = "#{field}:#{index}:embedded"
rescue ex
value = bytes.to_a
key = "#{field}:#{index}:bytes"
end
end
else
raise "Invalid type #{type}"
end
item[key] = value.as(Type)
index += 1
end
rescue ex
raise ex if !ignore_exceptions
end
item
end
def []=(key : String, value : Type)
case object = @raw
when Hash
object[key] = value
else
raise "Expected Hash for #[]=(key : String, value : Type), not #{object.class}"
end
end
def to_json
raw.to_json
end
def to_json(json)
raw.to_json(json)
end
def self.from_json(json : JSON::Any, io : IO, format = IO::ByteFormat::NetworkEndian)
case object = json.raw
when Hash
object.each do |key, value|
parts = key.split(":")
field = parts[0].to_i64
type = parts[-1]
header = (field << 3) | TAG_MAP[type]
VarLong.to_io(io, header)
case type
when "varint"
VarLong.to_io(io, value.raw.as(Number).to_i64!)
when "int32"
value.raw.as(Number).to_i32!.to_io(io, IO::ByteFormat::LittleEndian)
when "float32"
value.raw.as(Number).to_f32!.to_io(io, IO::ByteFormat::LittleEndian)
when "int64"
value.raw.as(Number).to_i64!.to_io(io, IO::ByteFormat::LittleEndian)
when "float64"
value.raw.as(Number).to_f64!.to_io(io, IO::ByteFormat::LittleEndian)
when "string"
VarLong.to_io(io, value.as_s.bytesize.to_i64)
io.print value.as_s
when "base64"
buffer = IO::Memory.new
from_json(value, buffer)
buffer.rewind
buffer = Base64.urlsafe_encode(buffer, padding: false)
VarLong.to_io(io, buffer.bytesize.to_i64)
buffer.to_s(io)
when "embedded"
buffer = IO::Memory.new
from_json(value, buffer)
buffer.rewind
VarLong.to_io(io, buffer.bytesize.to_i64)
IO.copy(buffer, io)
when "bytes"
VarLong.to_io(io, value.size.to_i64)
value.as_a.each { |byte| io.write_byte byte.as_i.to_u8 }
end
end
else
raise "Invalid value #{json}"
end
end
end
enum IOType
Base64
Hex
@ -321,15 +96,15 @@ end
case input_type
when IOType::Base64
output = ProtoBuf::Any.parse(IO::Memory.new(Base64.decode(URI.decode_www_form(URI.decode_www_form(STDIN.gets_to_end.strip)))))
output = Protodec::Any.parse(IO::Memory.new(Base64.decode(URI.decode_www_form(URI.decode_www_form(STDIN.gets_to_end.strip)))))
when IOType::Hex
array = STDIN.gets_to_end.strip.split(/[- ,]+/).map &.to_i(16).to_u8
output = ProtoBuf::Any.parse(IO::Memory.new(Slice.new(array.size) { |i| array[i] }))
output = Protodec::Any.parse(IO::Memory.new(Slice.new(array.size) { |i| array[i] }))
when IOType::Raw
output = ProtoBuf::Any.parse(IO::Memory.new(STDIN.gets_to_end))
output = Protodec::Any.parse(IO::Memory.new(STDIN.gets_to_end))
when IOType::Json, IOType::JsonPretty
output = IO::Memory.new
ProtoBuf::Any.from_json(JSON.parse(STDIN), output)
Protodec::Any.from_json(JSON.parse(STDIN), output)
else
output = ""
end
@ -342,7 +117,7 @@ when IOType::Hex
when IOType::Raw
STDOUT.write output.as(IO).to_slice
when IOType::Json
STDOUT.puts output.as(ProtoBuf::Any).to_json
STDOUT.puts output.as(Protodec::Any).to_json
when IOType::JsonPretty
STDOUT.puts output.as(ProtoBuf::Any).to_pretty_json
STDOUT.puts output.as(Protodec::Any).to_pretty_json
end

481
src/protodec/utils.cr Normal file
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@ -0,0 +1,481 @@
require "base64"
require "json"
require "uri"
module Protodec
struct VarLong
def self.from_io(io : IO, format = IO::ByteFormat::NetworkEndian) : Int64
result = 0_i64
num_read = 0
loop do
byte = io.read_byte
raise "Invalid VarLong" if !byte
value = byte & 0x7f
result |= value.to_i64 << (7 * num_read)
num_read += 1
break if byte & 0x80 == 0
raise "Invalid VarLong" if num_read > 10
end
result
end
def self.to_io(io : IO, value : Int64)
io.write_byte 0x00 if value == 0x00
value = value.to_u64!
while value != 0
byte = (value & 0x7f).to_u8!
value >>= 7
if value != 0
byte |= 0x80
end
io.write_byte byte
end
end
end
struct Any
enum Tag
VarInt = 0
Bit64 = 1
LengthDelimited = 2
Bit32 = 5
end
TAG_MAP = {
"varint" => 0,
"float32" => 5,
"int32" => 5,
"float64" => 1,
"int64" => 1,
"string" => 2,
"embedded" => 2,
"base64" => 2,
"bytes" => 2,
}
alias Type = Int32 |
Int64 |
Float64 |
String |
Array(UInt8) |
Hash(String, Any)
getter raw : Type
def initialize(@raw : Type)
end
def self.parse(io : IO)
from_io(io, ignore_exceptions: true)
end
def self.from_io(io : IO, format = IO::ByteFormat::NetworkEndian, ignore_exceptions = false)
item = new({} of String => Any)
index = 0
begin
until io.size == io.pos
begin
header = io.read_bytes(VarLong)
rescue ex
next
end
field = (header >> 3).to_i
type = Tag.new((header & 0b111).to_i)
case type
when Tag::VarInt
value = io.read_bytes(VarLong)
key = "#{field}:#{index}:varint"
when Tag::Bit32
value = io.read_bytes(Int32)
bytes = IO::Memory.new
value.to_io(bytes, IO::ByteFormat::LittleEndian)
bytes.rewind
begin
value = bytes.read_bytes(Float32, format: IO::ByteFormat::LittleEndian).to_f64
key = "#{field}:#{index}:float32"
rescue ex
value = value.to_i64
key = "#{field}:#{index}:int32"
end
when Tag::Bit64
value = io.read_bytes(Int64)
bytes = IO::Memory.new
value.to_io(bytes, IO::ByteFormat::LittleEndian)
bytes.rewind
begin
value = bytes.read_bytes(Float64, format: IO::ByteFormat::LittleEndian)
key = "#{field}:#{index}:float64"
rescue ex
key = "#{field}:#{index}:int64"
end
when Tag::LengthDelimited
size = io.read_bytes(VarLong)
raise "Invalid size" if size > 2**22
bytes = Bytes.new(size)
io.read_fully(bytes)
value = String.new(bytes)
if value.empty?
value = ""
key = "#{field}:#{index}:string"
elsif value.valid_encoding? && !value.codepoints.any? { |codepoint|
(0x00..0x1f).includes?(codepoint) &&
!{0x09, 0x0a, 0x0d}.includes?(codepoint)
}
begin
value = from_io(IO::Memory.new(Base64.decode(URI.decode_www_form(URI.decode_www_form(value))))).raw
key = "#{field}:#{index}:base64"
rescue ex
key = "#{field}:#{index}:string"
end
else
begin
value = from_io(IO::Memory.new(bytes)).raw
key = "#{field}:#{index}:embedded"
rescue ex
value = bytes.to_a
key = "#{field}:#{index}:bytes"
end
end
else
raise "Invalid type #{type}"
end
item[key] = value.as(Type)
index += 1
end
rescue ex
raise ex if !ignore_exceptions
end
item
end
def self.from_json(json : JSON::Any, format = IO::ByteFormat::NetworkEndian) : Bytes
io = IO::Memory.new
from_json(json, io, format)
return io.to_slice
end
def self.from_json(json : JSON::Any, io : IO, format = IO::ByteFormat::NetworkEndian)
case object = json.raw
when Hash
object.each do |key, value|
parts = key.split(":")
field = parts[0].to_i64
type = parts[-1]
header = (field << 3) | TAG_MAP[type]
VarLong.to_io(io, header)
case type
when "varint"
VarLong.to_io(io, value.raw.as(Number).to_i64!)
when "int32"
value.raw.as(Number).to_i32!.to_io(io, IO::ByteFormat::LittleEndian)
when "float32"
value.raw.as(Number).to_f32!.to_io(io, IO::ByteFormat::LittleEndian)
when "int64"
value.raw.as(Number).to_i64!.to_io(io, IO::ByteFormat::LittleEndian)
when "float64"
value.raw.as(Number).to_f64!.to_io(io, IO::ByteFormat::LittleEndian)
when "string"
VarLong.to_io(io, value.as_s.bytesize.to_i64)
io.print value.as_s
when "base64"
buffer = IO::Memory.new
from_json(value, buffer)
buffer.rewind
buffer = Base64.urlsafe_encode(buffer, padding: false)
VarLong.to_io(io, buffer.bytesize.to_i64)
buffer.to_s(io)
when "embedded"
buffer = IO::Memory.new
from_json(value, buffer)
buffer.rewind
VarLong.to_io(io, buffer.bytesize.to_i64)
IO.copy(buffer, io)
when "bytes"
VarLong.to_io(io, value.size.to_i64)
value.as_a.each { |byte| io.write_byte byte.as_i.to_u8 }
end
end
else
raise "Invalid value #{json}"
end
end
# Assumes the underlying value is an `Array` or `Hash` and returns its size.
# Raises if the underlying value is not an `Array` or `Hash`.
def size : Int
case object = @raw
when Array
object.size
when Hash
object.size
else
raise "Expected Array or Hash for #size, not #{object.class}"
end
end
# Assumes the underlying value is an `Array` and returns the element
# at the given index.
# Raises if the underlying value is not an `Array`.
# def [](index : Int) : Any
# case object = @raw
# when Array
# object[index]
# else
# raise "Expected Array for #[](index : Int), not #{object.class}"
# end
# end
def []=(key : String, value : Type)
case object = @raw
when Hash
object[key] = Protodec::Any.new(value)
else
raise "Expected Hash for #[]=(key : String, value : Type), not #{object.class}"
end
end
# Assumes the underlying value is an `Array` and returns the element
# at the given index, or `nil` if out of bounds.
# Raises if the underlying value is not an `Array`.
def []?(index : Int) : Protodec::Any?
case object = @raw
when Array
object[index]?
else
raise "Expected Array for #[]?(index : Int), not #{object.class}"
end
end
# Assumes the underlying value is a `Hash` and returns the element
# with the given key.
# Raises if the underlying value is not a `Hash`.
def [](key : String) : Protodec::Any
case object = @raw
when Hash
object[key].as(Protodec::Any)
else
raise "Expected Hash for #[](key : String), not #{object.class}"
end
end
# Assumes the underlying value is a `Hash` and returns the element
# with the given key, or `nil` if the key is not present.
# Raises if the underlying value is not a `Hash`.
def []?(key : String) : Protodec::Any?
case object = @raw
when Hash
object[key]?
else
raise "Expected Hash for #[]?(key : String), not #{object.class}"
end
end
# Traverses the depth of a structure and returns the value.
# Returns `nil` if not found.
def dig?(key : String | Int, *subkeys)
if (value = self[key]?) && value.responds_to?(:dig?)
value.dig?(*subkeys)
end
end
# :nodoc:
def dig?(key : String | Int)
self[key]?
end
# Traverses the depth of a structure and returns the value, otherwise raises.
def dig(key : String | Int, *subkeys)
if (value = self[key]) && value.responds_to?(:dig)
return value.dig(*subkeys)
end
raise "Protodec::Any value not diggable for key: #{key.inspect}"
end
# :nodoc:
def dig(key : String | Int)
self[key]
end
# Checks that the underlying value is `Nil`, and returns `nil`.
# Raises otherwise.
def as_nil : Nil
@raw.as(Nil)
end
# Checks that the underlying value is `Bool`, and returns its value.
# Raises otherwise.
def as_bool : Bool
@raw.as(Bool)
end
# Checks that the underlying value is `Bool`, and returns its value.
# Returns `nil` otherwise.
def as_bool? : Bool?
as_bool if @raw.is_a?(Bool)
end
# Checks that the underlying value is `Int`, and returns its value as an `Int32`.
# Raises otherwise.
def as_i : Int32
@raw.as(Int).to_i
end
# Checks that the underlying value is `Int`, and returns its value as an `Int32`.
# Returns `nil` otherwise.
def as_i? : Int32?
as_i if @raw.is_a?(Int)
end
# Checks that the underlying value is `Int`, and returns its value as an `Int64`.
# Raises otherwise.
def as_i64 : Int64
@raw.as(Int).to_i64
end
# Checks that the underlying value is `Int`, and returns its value as an `Int64`.
# Returns `nil` otherwise.
def as_i64? : Int64?
as_i64 if @raw.is_a?(Int64)
end
# Checks that the underlying value is `Float`, and returns its value as an `Float64`.
# Raises otherwise.
def as_f : Float64
@raw.as(Float64)
end
# Checks that the underlying value is `Float`, and returns its value as an `Float64`.
# Returns `nil` otherwise.
def as_f? : Float64?
@raw.as?(Float64)
end
# Checks that the underlying value is `Float`, and returns its value as an `Float32`.
# Raises otherwise.
def as_f32 : Float32
@raw.as(Float).to_f32
end
# Checks that the underlying value is `Float`, and returns its value as an `Float32`.
# Returns `nil` otherwise.
def as_f32? : Float32?
as_f32 if @raw.is_a?(Float)
end
# Checks that the underlying value is `String`, and returns its value.
# Raises otherwise.
def as_s : String
@raw.as(String)
end
# Checks that the underlying value is `String`, and returns its value.
# Returns `nil` otherwise.
def as_s? : String?
as_s if @raw.is_a?(String)
end
# Checks that the underlying value is `Array`, and returns its value.
# Raises otherwise.
def as_a : Array(Any)
@raw.as(Array)
end
# Checks that the underlying value is `Array`, and returns its value.
# Returns `nil` otherwise.
def as_a? : Array(Any)?
as_a if @raw.is_a?(Array)
end
# Checks that the underlying value is `Hash`, and returns its value.
# Raises otherwise.
def as_h : Hash(String, Any)
@raw.as(Hash)
end
# Checks that the underlying value is `Hash`, and returns its value.
# Returns `nil` otherwise.
def as_h? : Hash(String, Any)?
as_h if @raw.is_a?(Hash)
end
# :nodoc:
def inspect(io : IO) : Nil
@raw.inspect(io)
end
# :nodoc:
def to_s(io : IO) : Nil
@raw.to_s(io)
end
# :nodoc:
def pretty_print(pp)
@raw.pretty_print(pp)
end
# Returns `true` if both `self` and *other*'s raw object are equal.
def ==(other : Protodec::Any)
raw == other.raw
end
# Returns `true` if the raw object is equal to *other*.
def ==(other)
raw == other
end
# See `Object#hash(hasher)`
def_hash raw
# :nodoc:
def to_json(json : JSON::Builder)
raw.to_json(json)
end
def to_yaml(yaml : YAML::Nodes::Builder)
raw.to_yaml(yaml)
end
# Returns a new Protodec::Any instance with the `raw` value `dup`ed.
def dup
Any.new(raw.dup)
end
# Returns a new Protodec::Any instance with the `raw` value `clone`ed.
def clone
Any.new(raw.clone)
end
def self.cast_json(object)
raise "Invalid type" if !object.is_a?(Hash)
JSON::Any.new(object.transform_values do |value|
case value
when .is_a?(Hash)
cast_json(value)
else
JSON::Any.new(value)
end
end)
end
end
end