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fakengx.lua
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fakengx.lua
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local bit = require 'bit'
local socket = require 'socket'
local sha1 = require 'sha1'
local CRC32 = { 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D }
-- Helpers
local encode_param = function(str)
return tostring(str):gsub("\n", "\r\n"):gsub("([^%w])", function (c)
return string.format("%%%02X", string.byte(c))
end)
end
local encode_params = function(tab)
local list = {}
for k, v in pairs(tab) do
table.insert(list, encode_param(k) .. "=" .. encode_param(v))
end
return table.concat(list, "&")
end
local function reverse_merge(src, defs)
local opts = {}
for k,v in pairs(src) do opts[k] = v end
for k,v in pairs(defs) do
if src[k] then v = src[k] end
opts[k] = v
end
return opts
end
local function stub_options(opts, method)
opts = opts or {}
if method and opts["method"] == nil then opts["method"] = method end
if type(opts.args) == "table" then opts["args"] = encode_params(opts.args) end
return opts
end
local function stub_response(res)
return reverse_merge(res or {}, { status = 200, headers = {}, body = "" })
end
local control_chars = {
["\a"] = "\\a", ["\b"] = "\\b", ["\f"] = "\\f", ["\n"] = "\\n",
["\r"] = "\\r", ["\t"] = "\\t", ["\v"] = "\\v", ["\\"] = "\\\\"
}
local function replace_control_char(c)
return control_chars[c]
end
local function stub_format(uri, opts)
local pad = 0
for k,_ in pairs(opts) do
if k ~= "method" and #k > pad then pad = #k end
end
local msg = " " .. (opts.method or "GET") .. " " .. uri .. "\n"
for k,v in pairs(opts) do
if k ~= "method" then
k = k .. ":" .. string.rep(" ", pad + 1 - #k)
msg = msg .. " " .. k .. v:gsub("(%c)", replace_control_char) .. "\n"
end
end
return msg
end
-- Capture Registry
local Captures = {}
Captures.__index = Captures
function Captures:new()
local this = { stubs = {} }
setmetatable(this, Captures)
return this
end
function Captures:length()
return #self.stubs
end
function Captures:each(fun)
for i=self:length(),1,-1 do
local stub = self.stubs[i]
fun(stub)
end
end
function Captures:find(uri, opts)
opts = stub_options(opts, "GET")
for i=self:length(),1,-1 do
local stub = self.stubs[i]
if uri == stub.uri then
local is_match = true
for k,v in pairs(stub.opts) do
if type(v) == 'function' then
is_match = v(opts[k])
elseif type(v) == 'string' and v:sub(1, 2) == "~>" then
is_match = tostring(opts[k]):match(v:sub(3)) and true
elseif opts[k] ~= v then
is_match = false
end
if not is_match then break end
end
if is_match then return stub end
end
end
return nil
end
function Captures:stub(uri, opts, res)
local stub = { uri = uri, opts = stub_options(opts), res = stub_response(res), calls = {} }
table.insert(self.stubs, stub)
return stub
end
-- NGX Prototype
local protoype = {
-- Log constants
STDERR = 0,
EMERG = 1,
ALERT = 2,
CRIT = 3,
ERR = 4,
WARN = 5,
NOTICE = 6,
INFO = 7,
DEBUG = 8,
-- HTTP Method Constants
HTTP_GET = "GET",
HTTP_HEAD = "HEAD",
HTTP_POST = "POST",
HTTP_PUT = "PUT",
HTTP_DELETE = "DELETE",
-- HTTP Status Constants
HTTP_OK = 200,
HTTP_CREATED = 201,
HTTP_ACCEPTED = 202,
HTTP_NO_CONTENT = 204,
HTTP_PARTIAL_CONTENT = 206,
HTTP_SPECIAL_RESPONSE = 300,
HTTP_MOVED_PERMANENTLY = 301,
HTTP_MOVED_TEMPORARILY = 302,
HTTP_SEE_OTHER = 303,
HTTP_NOT_MODIFIED = 304,
HTTP_BAD_REQUEST = 400,
HTTP_UNAUTHORIZED = 401,
HTTP_FORBIDDEN = 403,
HTTP_NOT_FOUND = 404,
HTTP_NOT_ALLOWED = 405,
HTTP_REQUEST_TIME_OUT = 408,
HTTP_CONFLICT = 409,
HTTP_LENGTH_REQUIRED = 411,
HTTP_PRECONDITION_FAILED = 412,
HTTP_REQUEST_ENTITY_TOO_LARGE = 413,
HTTP_REQUEST_URI_TOO_LARGE = 414,
HTTP_UNSUPPORTED_MEDIA_TYPE = 415,
HTTP_RANGE_NOT_SATISFIABLE = 416,
HTTP_CLOSE = 444,
HTTP_NGINX_CODES = 494,
HTTP_REQUEST_HEADER_TOO_LARGE = 494,
HTTP_INTERNAL_SERVER_ERROR = 500,
HTTP_NOT_IMPLEMENTED = 501,
HTTP_BAD_GATEWAY = 502,
HTTP_SERVICE_UNAVAILABLE = 503,
HTTP_GATEWAY_TIME_OUT = 504,
HTTP_INSUFFICIENT_STORAGE = 507,
}
-- NGX Builder
local fakengx = {}
-- Constructor
function fakengx.new()
local ngx = {}
for k, v in pairs(protoype) do
ngx[k] = v
end
setmetatable(ngx, getmetatable(protoype))
-- Defaults
ngx.status = 200
ngx.location = {}
-- Tables
ngx.var = {}
ngx.header = {}
ngx.arg = {}
ngx.req = {}
-- Internal Registries
ngx._captures = Captures:new()
ngx._body = ""
ngx._log = ""
ngx._exit = nil
-- http://wiki.nginx.org/HttpLuaModule#ngx.print
function ngx.print(s)
ngx._body = ngx._body .. s
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.say
function ngx.say(s)
ngx.print(s .. "\n")
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.log
function ngx.log(level, s)
ngx._log = ngx._log .. "LOG(" .. tostring(level) .. "): " .. s .. "\n"
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.time
function ngx.time()
if not ngx._time then
ngx._time = os.time()
end
return ngx._time
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.update_time
function ngx.update_time()
ngx._time = nil
ngx._now = nil
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.now
function ngx.now()
if not ngx._now then
ngx._now = socket.gettime()
end
return ngx._now
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.exit
function ngx.exit(status)
if status > ngx.status then ngx.status = status end
ngx._exit = status
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.crc32_short
function ngx.crc32_short(s)
local crc, l, i = 0xFFFFFFFF, string.len(s)
for i = 1, l, 1 do
crc = bit.bxor(bit.rshift(crc, 8), CRC32[bit.band(bit.bxor(crc, string.byte(s, i)), 0xFF) + 1])
end
return bit.bxor(crc, -1)
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.hmac_sha1
function ngx.hmac_sha1(secret_key, str)
return sha1.hmac_sha1(secret_key, str)
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.sha1_bin
function ngx.sha1_bin(str)
return sha1.sha1_binary(str)
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.escape_uri
function ngx.escape_uri(str)
return tostring(str):gsub("\n", "\r\n"):gsub("([^%w ])", function (c)
return string.format("%%%02X", string.byte(c))
end):gsub(" ", "+")
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.unescape_uri
function ngx.unescape_uri(str)
return tostring(str):gsub("+", " "):gsub("\r\n", "\n"):gsub("%%(%x%x)", function(h)
return string.char(tonumber(h,16))
end)
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.encode_args
function ngx.encode_args(tab)
return encode_params(tab)
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.location.capture
function ngx.location.capture(uri, opts)
local stub = ngx._captures:find(uri, opts)
if not stub then
local msg = "\n\nUnstubbed request:\n\n" .. stub_format(uri, opts) .. "\nStubbed were:\n"
ngx._captures:each(function(stub)
msg = msg .. "\n" .. stub_format(stub.uri, stub.opts)
end)
error(msg)
end
table.insert(stub.calls, { uri = uri, opts = opts })
return stub.res
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.location.capture_multi
function ngx.location.capture_multi(...)
local requests = ...
local responses = {}
for i, request in ipairs(requests) do
table.insert(responses, ngx.location.capture(request[1], request[2]))
end
return unpack(responses)
end
-- Stub a capture
function ngx.location.stub(...)
return ngx._captures:stub(...)
end
-- http://wiki.nginx.org/HttpLuaModule#ngx.req.read_body
function ngx.req.read_body()
end
return ngx
end
return fakengx