Merge pull request #1349 from SkynetLabs/base-32-lua-converter
implement base32 decoder
This commit is contained in:
Ivaylo Novakov
GitHub
commit
972013e9f9
|
|
@ -0,0 +1,32 @@
|
|||
# Install and run unit tests with busted
|
||||
# Docs: http://olivinelabs.com/busted/
|
||||
|
||||
name: Nginx Lua Unit Tests
|
||||
|
||||
on:
|
||||
pull_request:
|
||||
paths:
|
||||
- "docker/nginx/libs/**.lua"
|
||||
|
||||
jobs:
|
||||
build:
|
||||
runs-on: ubuntu-latest
|
||||
|
||||
steps:
|
||||
- uses: actions/checkout@v2
|
||||
- uses: actions/setup-python@v2
|
||||
with:
|
||||
python-version: "3.x"
|
||||
architecture: "x64"
|
||||
|
||||
- name: Install Dependencies
|
||||
run: |
|
||||
pip install hererocks
|
||||
hererocks env --lua=5.1 -rlatest
|
||||
source env/bin/activate
|
||||
luarocks install busted
|
||||
|
||||
- name: Unit Tests
|
||||
run: |
|
||||
source env/bin/activate
|
||||
busted --verbose --pattern=spec --directory=docker/nginx/libs .
|
||||
|
|
@ -7,6 +7,7 @@ RUN luarocks install lua-resty-http && \
|
|||
-out /etc/ssl/local-certificate.crt
|
||||
|
||||
COPY mo ./
|
||||
COPY libs /etc/nginx/libs
|
||||
COPY conf.d /etc/nginx/conf.d
|
||||
COPY conf.d.templates /etc/nginx/conf.d.templates
|
||||
|
||||
|
|
|
|||
|
|
@ -7,3 +7,6 @@ set $hns_domain '';
|
|||
|
||||
# set only if server has been access through SERVER_DOMAIN
|
||||
set $server_alias '';
|
||||
|
||||
# expose skylink variable so we can use it in access log
|
||||
set $skylink '';
|
||||
|
|
|
|||
|
|
@ -11,6 +11,10 @@ if ($request_method = PURGE) {
|
|||
|
||||
limit_conn downloads_by_ip 100; # ddos protection: max 100 downloads at a time
|
||||
|
||||
# ensure that skylink that we pass around is base64 encoded (transform base32 encoded ones)
|
||||
# this is important because we want only one format in cache keys and logs
|
||||
set_by_lua_block $skylink { return require("skynet.skylink").parse(ngx.var.skylink) }
|
||||
|
||||
# $skylink_v1 and $skylink_v2 variables default to the same value but in case the requested skylink was:
|
||||
# a) skylink v1 - it would not matter, no additional logic is executed
|
||||
# b) skylink v2 - in a lua block below we will resolve the skylink v2 into skylink v1 and update
|
||||
|
|
|
|||
|
|
@ -37,6 +37,7 @@ location / {
|
|||
ngx.var.skylink = cache_value
|
||||
end
|
||||
|
||||
ngx.var.skylink = require("skynet.skylink").parse(ngx.var.skylink)
|
||||
ngx.var.skylink_v1 = ngx.var.skylink
|
||||
ngx.var.skylink_v2 = ngx.var.skylink
|
||||
}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,301 @@
|
|||
-- source: https://github.com/aiq/basexx
|
||||
-- license: MIT
|
||||
-- modified: exposed from_basexx and to_basexx generic functions
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- util functions
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local function divide_string( str, max )
|
||||
local result = {}
|
||||
|
||||
local start = 1
|
||||
for i = 1, #str do
|
||||
if i % max == 0 then
|
||||
table.insert( result, str:sub( start, i ) )
|
||||
start = i + 1
|
||||
elseif i == #str then
|
||||
table.insert( result, str:sub( start, i ) )
|
||||
end
|
||||
end
|
||||
|
||||
return result
|
||||
end
|
||||
|
||||
local function number_to_bit( num, length )
|
||||
local bits = {}
|
||||
|
||||
while num > 0 do
|
||||
local rest = math.floor( math.fmod( num, 2 ) )
|
||||
table.insert( bits, rest )
|
||||
num = ( num - rest ) / 2
|
||||
end
|
||||
|
||||
while #bits < length do
|
||||
table.insert( bits, "0" )
|
||||
end
|
||||
|
||||
return string.reverse( table.concat( bits ) )
|
||||
end
|
||||
|
||||
local function ignore_set( str, set )
|
||||
if set then
|
||||
str = str:gsub( "["..set.."]", "" )
|
||||
end
|
||||
return str
|
||||
end
|
||||
|
||||
local function pure_from_bit( str )
|
||||
return ( str:gsub( '........', function ( cc )
|
||||
return string.char( tonumber( cc, 2 ) )
|
||||
end ) )
|
||||
end
|
||||
|
||||
local function unexpected_char_error( str, pos )
|
||||
local c = string.sub( str, pos, pos )
|
||||
return string.format( "unexpected character at position %d: '%s'", pos, c )
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local basexx = {}
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- base2(bitfield) decode and encode function
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local bitMap = { o = "0", i = "1", l = "1" }
|
||||
|
||||
function basexx.from_bit( str, ignore )
|
||||
str = ignore_set( str, ignore )
|
||||
str = string.lower( str )
|
||||
str = str:gsub( '[ilo]', function( c ) return bitMap[ c ] end )
|
||||
local pos = string.find( str, "[^01]" )
|
||||
if pos then return nil, unexpected_char_error( str, pos ) end
|
||||
|
||||
return pure_from_bit( str )
|
||||
end
|
||||
|
||||
function basexx.to_bit( str )
|
||||
return ( str:gsub( '.', function ( c )
|
||||
local byte = string.byte( c )
|
||||
local bits = {}
|
||||
for _ = 1,8 do
|
||||
table.insert( bits, byte % 2 )
|
||||
byte = math.floor( byte / 2 )
|
||||
end
|
||||
return table.concat( bits ):reverse()
|
||||
end ) )
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- base16(hex) decode and encode function
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
function basexx.from_hex( str, ignore )
|
||||
str = ignore_set( str, ignore )
|
||||
local pos = string.find( str, "[^%x]" )
|
||||
if pos then return nil, unexpected_char_error( str, pos ) end
|
||||
|
||||
return ( str:gsub( '..', function ( cc )
|
||||
return string.char( tonumber( cc, 16 ) )
|
||||
end ) )
|
||||
end
|
||||
|
||||
function basexx.to_hex( str )
|
||||
return ( str:gsub( '.', function ( c )
|
||||
return string.format('%02X', string.byte( c ) )
|
||||
end ) )
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- generic function to decode and encode base32/base64
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
function basexx.from_basexx( str, alphabet, bits )
|
||||
local result = {}
|
||||
for i = 1, #str do
|
||||
local c = string.sub( str, i, i )
|
||||
if c ~= '=' then
|
||||
local index = string.find( alphabet, c, 1, true )
|
||||
if not index then
|
||||
return nil, unexpected_char_error( str, i )
|
||||
end
|
||||
table.insert( result, number_to_bit( index - 1, bits ) )
|
||||
end
|
||||
end
|
||||
|
||||
local value = table.concat( result )
|
||||
local pad = #value % 8
|
||||
return pure_from_bit( string.sub( value, 1, #value - pad ) )
|
||||
end
|
||||
|
||||
function basexx.to_basexx( str, alphabet, bits, pad )
|
||||
local bitString = basexx.to_bit( str )
|
||||
|
||||
local chunks = divide_string( bitString, bits )
|
||||
local result = {}
|
||||
for _,value in ipairs( chunks ) do
|
||||
if ( #value < bits ) then
|
||||
value = value .. string.rep( '0', bits - #value )
|
||||
end
|
||||
local pos = tonumber( value, 2 ) + 1
|
||||
table.insert( result, alphabet:sub( pos, pos ) )
|
||||
end
|
||||
|
||||
table.insert( result, pad )
|
||||
return table.concat( result )
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- rfc 3548: http://www.rfc-editor.org/rfc/rfc3548.txt
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local base32Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567"
|
||||
local base32PadMap = { "", "======", "====", "===", "=" }
|
||||
|
||||
function basexx.from_base32( str, ignore )
|
||||
str = ignore_set( str, ignore )
|
||||
return basexx.from_basexx( string.upper( str ), base32Alphabet, 5 )
|
||||
end
|
||||
|
||||
function basexx.to_base32( str )
|
||||
return basexx.to_basexx( str, base32Alphabet, 5, base32PadMap[ #str % 5 + 1 ] )
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- crockford: http://www.crockford.com/wrmg/base32.html
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local crockfordAlphabet = "0123456789ABCDEFGHJKMNPQRSTVWXYZ"
|
||||
local crockfordMap = { O = "0", I = "1", L = "1" }
|
||||
|
||||
function basexx.from_crockford( str, ignore )
|
||||
str = ignore_set( str, ignore )
|
||||
str = string.upper( str )
|
||||
str = str:gsub( '[ILOU]', function( c ) return crockfordMap[ c ] end )
|
||||
return basexx.from_basexx( str, crockfordAlphabet, 5 )
|
||||
end
|
||||
|
||||
function basexx.to_crockford( str )
|
||||
return basexx.to_basexx( str, crockfordAlphabet, 5, "" )
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- base64 decode and encode function
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local base64Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"..
|
||||
"abcdefghijklmnopqrstuvwxyz"..
|
||||
"0123456789+/"
|
||||
local base64PadMap = { "", "==", "=" }
|
||||
|
||||
function basexx.from_base64( str, ignore )
|
||||
str = ignore_set( str, ignore )
|
||||
return basexx.from_basexx( str, base64Alphabet, 6 )
|
||||
end
|
||||
|
||||
function basexx.to_base64( str )
|
||||
return basexx.to_basexx( str, base64Alphabet, 6, base64PadMap[ #str % 3 + 1 ] )
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
-- URL safe base64 decode and encode function
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local url64Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"..
|
||||
"abcdefghijklmnopqrstuvwxyz"..
|
||||
"0123456789-_"
|
||||
|
||||
function basexx.from_url64( str, ignore )
|
||||
str = ignore_set( str, ignore )
|
||||
return basexx.from_basexx( str, url64Alphabet, 6 )
|
||||
end
|
||||
|
||||
function basexx.to_url64( str )
|
||||
return basexx.to_basexx( str, url64Alphabet, 6, "" )
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
--
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
local function length_error( len, d )
|
||||
return string.format( "invalid length: %d - must be a multiple of %d", len, d )
|
||||
end
|
||||
|
||||
local z85Decoder = { 0x00, 0x44, 0x00, 0x54, 0x53, 0x52, 0x48, 0x00,
|
||||
0x4B, 0x4C, 0x46, 0x41, 0x00, 0x3F, 0x3E, 0x45,
|
||||
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
|
||||
0x08, 0x09, 0x40, 0x00, 0x49, 0x42, 0x4A, 0x47,
|
||||
0x51, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A,
|
||||
0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32,
|
||||
0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A,
|
||||
0x3B, 0x3C, 0x3D, 0x4D, 0x00, 0x4E, 0x43, 0x00,
|
||||
0x00, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10,
|
||||
0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
|
||||
0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20,
|
||||
0x21, 0x22, 0x23, 0x4F, 0x00, 0x50, 0x00, 0x00 }
|
||||
|
||||
function basexx.from_z85( str, ignore )
|
||||
str = ignore_set( str, ignore )
|
||||
if ( #str % 5 ) ~= 0 then
|
||||
return nil, length_error( #str, 5 )
|
||||
end
|
||||
|
||||
local result = {}
|
||||
|
||||
local value = 0
|
||||
for i = 1, #str do
|
||||
local index = string.byte( str, i ) - 31
|
||||
if index < 1 or index >= #z85Decoder then
|
||||
return nil, unexpected_char_error( str, i )
|
||||
end
|
||||
value = ( value * 85 ) + z85Decoder[ index ]
|
||||
if ( i % 5 ) == 0 then
|
||||
local divisor = 256 * 256 * 256
|
||||
while divisor ~= 0 do
|
||||
local b = math.floor( value / divisor ) % 256
|
||||
table.insert( result, string.char( b ) )
|
||||
divisor = math.floor( divisor / 256 )
|
||||
end
|
||||
value = 0
|
||||
end
|
||||
end
|
||||
|
||||
return table.concat( result )
|
||||
end
|
||||
|
||||
local z85Encoder = "0123456789"..
|
||||
"abcdefghijklmnopqrstuvwxyz"..
|
||||
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"..
|
||||
".-:+=^!/*?&<>()[]{}@%$#"
|
||||
|
||||
function basexx.to_z85( str )
|
||||
if ( #str % 4 ) ~= 0 then
|
||||
return nil, length_error( #str, 4 )
|
||||
end
|
||||
|
||||
local result = {}
|
||||
|
||||
local value = 0
|
||||
for i = 1, #str do
|
||||
local b = string.byte( str, i )
|
||||
value = ( value * 256 ) + b
|
||||
if ( i % 4 ) == 0 then
|
||||
local divisor = 85 * 85 * 85 * 85
|
||||
while divisor ~= 0 do
|
||||
local index = ( math.floor( value / divisor ) % 85 ) + 1
|
||||
table.insert( result, z85Encoder:sub( index, index ) )
|
||||
divisor = math.floor( divisor / 85 )
|
||||
end
|
||||
value = 0
|
||||
end
|
||||
end
|
||||
|
||||
return table.concat( result )
|
||||
end
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
return basexx
|
||||
|
|
@ -0,0 +1,16 @@
|
|||
local _M = {}
|
||||
|
||||
local basexx = require("basexx")
|
||||
|
||||
-- parse any skylink and return base64 version
|
||||
function _M.parse(skylink)
|
||||
if string.len(skylink) == 55 then
|
||||
local decoded = basexx.from_basexx(string.upper(skylink), "0123456789ABCDEFGHIJKLMNOPQRSTUV", 5)
|
||||
|
||||
return basexx.to_url64(decoded)
|
||||
end
|
||||
|
||||
return skylink
|
||||
end
|
||||
|
||||
return _M
|
||||
|
|
@ -0,0 +1,14 @@
|
|||
skylink = require("skynet/skylink")
|
||||
|
||||
describe("parse", function()
|
||||
local base32 = "0404dsjvti046fsua4ktor9grrpe76erq9jot9cvopbhsvsu76r4r30"
|
||||
local base64 = "AQBG8n_sgEM_nlEp3G0w3vLjmdvSZ46ln8ZXHn-eObZNjA"
|
||||
|
||||
it("should return unchanged base64 skylink", function()
|
||||
assert.is.same(skylink.parse(base64), base64)
|
||||
end)
|
||||
|
||||
it("should transform base32 skylink into base64", function()
|
||||
assert.is.same(skylink.parse(base32), base64)
|
||||
end)
|
||||
end)
|
||||
|
|
@ -38,6 +38,8 @@ http {
|
|||
include mime.types;
|
||||
default_type application/octet-stream;
|
||||
|
||||
lua_package_path "/etc/nginx/libs/?.lua;;";
|
||||
|
||||
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
|
||||
'$status $body_bytes_sent "$http_referer" '
|
||||
'"$http_user_agent" $upstream_response_time '
|
||||
|
|
@ -45,7 +47,7 @@ http {
|
|||
'"$upstream_http_content_type" "$upstream_cache_status" '
|
||||
'"$server_alias" "$sent_http_skynet_skylink" '
|
||||
'$upstream_connect_time $upstream_header_time '
|
||||
'$request_time "$hns_domain"';
|
||||
'$request_time "$hns_domain" "$skylink"';
|
||||
|
||||
access_log logs/access.log main;
|
||||
|
||||
|
|
@ -74,6 +76,7 @@ http {
|
|||
init_by_lua_block {
|
||||
require "cjson"
|
||||
require "resty.http"
|
||||
require "skynet.skylink"
|
||||
}
|
||||
|
||||
# include skynet-portal-api and skynet-server-api header on every request
|
||||
|
|
|
|||
Reference in New Issue