# HG changeset patch # User Waqas Hussain # Date 1278707705 -18000 # Node ID 316d7c8e1fb040351b4267d0fa6e690d59640c7e # Parent 4927b9737bb78f5f1c938a1c60a04f9a410633b1 mod_couchdb: Initial commit. diff -r 4927b9737bb7 -r 316d7c8e1fb0 mod_couchdb/couchdb/couchapi.lib.lua --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_couchdb/couchdb/couchapi.lib.lua Sat Jul 10 01:35:05 2010 +0500 @@ -0,0 +1,97 @@ + +local setmetatable = setmetatable; +local pcall = pcall; +local type = type; +local t_concat = table.concat; +local print = print; + +local socket_url = require "socket.url"; +local http = require "socket.http"; +local ltn12 = require "ltn12"; + +--local json = require "json"; +local json = module:require("couchdb/json"); + +--module("couchdb") +local _M = {}; + +local function urlcat(url, path) + return url:gsub("/*$", "").."/"..path:gsub("^/*", ""); +end + +local doc_mt = {}; +doc_mt.__index = doc_mt; + +function doc_mt:get() + return self.db:get(socket_url.escape(self.id)); +end +function doc_mt:put(val) + return self.db:put(socket_url.escape(self.id), val); +end +function doc_mt:__tostring() + return "couchdb.doc("..self.url..")"; +end + + +local db_mt = {}; +db_mt.__index = db_mt; + +function db_mt:__tostring() + return "couchdb.db("..self.url..")"; +end +function db_mt:doc(id) + local url = urlcat(self.url, socket_url.escape(id)); + return setmetatable({ url = url, db = self, id = id }, doc_mt); +end +function db_mt:get(id) + local url = urlcat(self.url, id); + local a,b = http.request(url); + local r,x = pcall(json.decode, a); + if r then a = x; end + return a,b; +end +function db_mt:put(id, value) + local url = urlcat(self.url, id); + if type(value) == "table" then + value = json.encode(value); + elseif value ~= nil and type(value) ~= "string" then + return nil, "Invalid type"; + end + local t = {}; + local a,b = http.request { + url = url, + sink = ltn12.sink.table(t), + source = ltn12.source.string(value), + method = "PUT", + headers = { + ["Content-Length"] = #value, + ["Content-Type"] = "application/json" + } + }; + a = t_concat(t); + local r,x = pcall(json.decode, a); + if r then a = x; end + return a,b; +end + + +local server_mt = {}; +server_mt.__index = server_mt; + +function server_mt:db(name) + local url = urlcat(self.url, socket_url.escape(name)); + return setmetatable({ url = url }, db_mt); +end +function server_mt:__tostring() + return "couchdb.server("..self.url..")"; +end + + +function _M.server(url) + return setmetatable({ url = url }, server_mt); +end +function _M.db(url) + return setmetatable({ url = url }, db_mt); +end + +return _M; diff -r 4927b9737bb7 -r 316d7c8e1fb0 mod_couchdb/couchdb/couchdb.lib.lua --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_couchdb/couchdb/couchdb.lib.lua Sat Jul 10 01:35:05 2010 +0500 @@ -0,0 +1,91 @@ + +local http = require "socket.http"; +local url = require "socket.url"; + +local couchapi = module:require("couchdb/couchapi"); +local json = module:require("couchdb/json"); + +local couchdb_url = assert(module:get_option("couchdb_url"), "Option couchdb_url not specified"); +local db = couchapi.db(couchdb_url); + +local function couchdb_get(key) + local a,b = db:doc(key):get() + print(json.encode(a)); + if b == 404 then return nil; end + if b == 200 then b = nil; end + return a.payload,b; +end + +local function couchdb_put(key, value) + local a,b = db:doc(key):get(); + return db:doc(key):put({ payload = value, _rev = a and a._rev }); +end + +local st = require "util.stanza"; + +local handlers = {}; + +handlers.accounts = { + get = function(self, user) + return couchdb_get(self.host.."/"..user.."/account"); + end; + set = function(self, user, data) + return couchdb_put(self.host.."/"..user.."/account", data); + end; +}; +handlers.vcard = { + get = function(self, user) + return couchdb_get(self.host.."/"..user.."/vcard"); + end; + set = function(self, user, data) + return couchdb_put(self.host.."/"..user.."/vcard", data); + end; +}; +handlers.private = { + get = function(self, user) + return couchdb_get(self.host.."/"..user.."/private"); + end; + set = function(self, user, data) + return couchdb_put(self.host.."/"..user.."/private", data); + end; +}; +handlers.roster = { + get = function(self, user) + return couchdb_get(self.host.."/"..user.."/roster"); + end; + set = function(self, user, data) + return couchdb_put(self.host.."/"..user.."/roster", data); + end; +}; + +----------------------------- +local driver = {}; +driver.__index = driver; + +function driver:open(host, datastore, typ) + local cache_key = host.." "..datastore; + if self.ds_cache[cache_key] then return self.ds_cache[cache_key]; end + local instance = setmetatable({}, self); + instance.host = host; + instance.datastore = datastore; + local handler = handlers[datastore]; + if not handler then return nil; end + for key,val in pairs(handler) do + instance[key] = val; + end + if instance.init then instance:init(); end + self.ds_cache[cache_key] = instance; + return instance; +end + +----------------------------- +local _M = {}; + +function _M.new() + local instance = setmetatable({}, driver); + instance.__index = instance; + instance.ds_cache = {}; + return instance; +end + +return _M; diff -r 4927b9737bb7 -r 316d7c8e1fb0 mod_couchdb/couchdb/json.lib.lua --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_couchdb/couchdb/json.lib.lua Sat Jul 10 01:35:05 2010 +0500 @@ -0,0 +1,354 @@ + +local type = type; +local t_insert, t_concat, t_remove = table.insert, table.concat, table.remove; +local s_char = string.char; +local tostring, tonumber = tostring, tonumber; +local pairs, ipairs = pairs, ipairs; +local next = next; +local error = error; +local newproxy, getmetatable = newproxy, getmetatable; +local print = print; + +--module("json") +local _M = {}; + +local null = newproxy and newproxy(true) or {}; +if getmetatable and getmetatable(null) then + getmetatable(null).__tostring = function() return "null"; end; +end +_M.null = null; + +local escapes = { + ["\""] = "\\\"", ["\\"] = "\\\\", ["\b"] = "\\b", + ["\f"] = "\\f", ["\n"] = "\\n", ["\r"] = "\\r", ["\t"] = "\\t"}; +local unescapes = { + ["\""] = "\"", ["\\"] = "\\", ["/"] = "/", + b = "\b", f = "\f", n = "\n", r = "\r", t = "\t"}; +for i=0,31 do + local ch = s_char(i); + if not escapes[ch] then escapes[ch] = ("\\u%.4X"):format(i); end +end + +local valid_types = { + number = true, + string = true, + table = true, + boolean = true +}; +local special_keys = { + __array = true; + __hash = true; +}; + +local simplesave, tablesave, arraysave, stringsave; + +function stringsave(o, buffer) + -- FIXME do proper utf-8 and binary data detection + t_insert(buffer, "\""..(o:gsub(".", escapes)).."\""); +end + +function arraysave(o, buffer) + t_insert(buffer, "["); + if next(o) then + for i,v in ipairs(o) do + simplesave(v, buffer); + t_insert(buffer, ","); + end + t_remove(buffer); + end + t_insert(buffer, "]"); +end + +function tablesave(o, buffer) + local __array = {}; + local __hash = {}; + local hash = {}; + for i,v in ipairs(o) do + __array[i] = v; + end + for k,v in pairs(o) do + local ktype, vtype = type(k), type(v); + if valid_types[vtype] or v == null then + if ktype == "string" and not special_keys[k] then + hash[k] = v; + elseif (valid_types[ktype] or k == null) and __array[k] == nil then + __hash[k] = v; + end + end + end + if next(__hash) ~= nil or next(hash) ~= nil or next(__array) == nil then + t_insert(buffer, "{"); + local mark = #buffer; + for k,v in pairs(hash) do + stringsave(k, buffer); + t_insert(buffer, ":"); + simplesave(v, buffer); + t_insert(buffer, ","); + end + if next(__hash) ~= nil then + t_insert(buffer, "\"__hash\":["); + for k,v in pairs(__hash) do + simplesave(k, buffer); + t_insert(buffer, ","); + simplesave(v, buffer); + t_insert(buffer, ","); + end + t_remove(buffer); + t_insert(buffer, "]"); + t_insert(buffer, ","); + end + if next(__array) then + t_insert(buffer, "\"__array\":"); + arraysave(__array, buffer); + t_insert(buffer, ","); + end + if mark ~= #buffer then t_remove(buffer); end + t_insert(buffer, "}"); + else + arraysave(__array, buffer); + end +end + +function simplesave(o, buffer) + local t = type(o); + if t == "number" then + t_insert(buffer, tostring(o)); + elseif t == "string" then + stringsave(o, buffer); + elseif t == "table" then + tablesave(o, buffer); + elseif t == "boolean" then + t_insert(buffer, (o and "true" or "false")); + else + t_insert(buffer, "null"); + end +end + +function _M.encode(obj) + local t = {}; + simplesave(obj, t); + return t_concat(t); +end + +----------------------------------- + + +function _M.decode(json) + local pos = 1; + local current = {}; + local stack = {}; + local ch, peek; + local function next() + ch = json:sub(pos, pos); + pos = pos+1; + peek = json:sub(pos, pos); + return ch; + end + + local function skipwhitespace() + while ch and (ch == "\r" or ch == "\n" or ch == "\t" or ch == " ") do + next(); + end + end + local function skiplinecomment() + repeat next(); until not(ch) or ch == "\r" or ch == "\n"; + skipwhitespace(); + end + local function skipstarcomment() + next(); next(); -- skip '/', '*' + while peek and ch ~= "*" and peek ~= "/" do next(); end + if not peek then error("eof in star comment") end + next(); next(); -- skip '*', '/' + skipwhitespace(); + end + local function skipstuff() + while true do + skipwhitespace(); + if ch == "/" and peek == "*" then + skipstarcomment(); + elseif ch == "/" and peek == "*" then + skiplinecomment(); + else + return; + end + end + end + + local readvalue; + local function readarray() + local t = {}; + next(); -- skip '[' + skipstuff(); + if ch == "]" then next(); return t; end + t_insert(t, readvalue()); + while true do + skipstuff(); + if ch == "]" then next(); return t; end + if not ch then error("eof while reading array"); + elseif ch == "," then next(); + elseif ch then error("unexpected character in array, comma expected"); end + if not ch then error("eof while reading array"); end + t_insert(t, readvalue()); + end + end + + local function checkandskip(c) + local x = ch or "eof"; + if x ~= c then error("unexpected "..x..", '"..c.."' expected"); end + next(); + end + local function readliteral(lit, val) + for c in lit:gmatch(".") do + checkandskip(c); + end + return val; + end + local function readstring() + local s = ""; + checkandskip("\""); + while ch do + while ch and ch ~= "\\" and ch ~= "\"" do + s = s..ch; next(); + end + if ch == "\\" then + next(); + if unescapes[ch] then + s = s..unescapes[ch]; + next(); + elseif ch == "u" then + local seq = ""; + for i=1,4 do + next(); + if not ch then error("unexpected eof in string"); end + if not ch:match("[0-9a-fA-F]") then error("invalid unicode escape sequence in string"); end + seq = seq..ch; + end + s = s..s.char(tonumber(seq, 16)); -- FIXME do proper utf-8 + next(); + else error("invalid escape sequence in string"); end + end + if ch == "\"" then + next(); + return s; + end + end + error("eof while reading string"); + end + local function readnumber() + local s = ""; + if ch == "-" then + s = s..ch; next(); + if not ch:match("[0-9]") then error("number format error"); end + end + if ch == "0" then + s = s..ch; next(); + if ch:match("[0-9]") then error("number format error"); end + else + while ch and ch:match("[0-9]") do + s = s..ch; next(); + end + end + if ch == "." then + s = s..ch; next(); + if not ch:match("[0-9]") then error("number format error"); end + while ch and ch:match("[0-9]") do + s = s..ch; next(); + end + if ch == "e" or ch == "E" then + s = s..ch; next(); + if ch == "+" or ch == "-" then + s = s..ch; next(); + if not ch:match("[0-9]") then error("number format error"); end + while ch and ch:match("[0-9]") do + s = s..ch; next(); + end + end + end + end + return tonumber(s); + end + local function readmember(t) + local k = readstring(); + checkandskip(":"); + t[k] = readvalue(); + end + local function fixobject(obj) + local __array = obj.__array; + if __array then + obj.__array = nil; + for i,v in ipairs(__array) do + t_insert(obj, v); + end + end + local __hash = obj.__hash; + if __hash then + obj.__hash = nil; + local k; + for i,v in ipairs(__hash) do + if k ~= nil then + obj[k] = v; k = nil; + else + k = v; + end + end + end + return obj; + end + local function readobject() + local t = {}; + next(); -- skip '{' + skipstuff(); + if ch == "}" then next(); return t; end + if not ch then error("eof while reading object"); end + readmember(t); + while true do + skipstuff(); + if ch == "}" then next(); return fixobject(t); end + if not ch then error("eof while reading object"); + elseif ch == "," then next(); + elseif ch then error("unexpected character in object, comma expected"); end + if not ch then error("eof while reading object"); end + readmember(t); + end + end + + function readvalue() + skipstuff(); + while ch do + if ch == "{" then + return readobject(); + elseif ch == "[" then + return readarray(); + elseif ch == "\"" then + return readstring(); + elseif ch:match("[%-0-9%.]") then + return readnumber(); + elseif ch == "n" then + return readliteral("null", null); + elseif ch == "t" then + return readliteral("true", true); + elseif ch == "f" then + return readliteral("false", false); + end + end + error("eof while reading value"); + end + next(); + return readvalue(); +end + +function _M.test(object) + local encoded = encode(object); + local decoded = decode(encoded); + local recoded = encode(decoded); + if encoded ~= recoded then + print("FAILED"); + print("encoded:", encoded); + print("recoded:", recoded); + else + print(encoded); + end + return encoded ~= recoded; +end + +return _M;