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authorSteven Barth <steven@midlink.org>2009-06-14 09:02:40 +0000
committerSteven Barth <steven@midlink.org>2009-06-14 09:02:40 +0000
commitbdf0a4b520bdeb2c892f7eaadf3242c1b824bf11 (patch)
treed954cf6fdd8f426ce7aff795534837bfb0af1caf /libs/rpcc/luasrc/rpcc.lua
parentc47be2e727d1bb3e2e3aa415ec96be2a5f8a45b7 (diff)
GSoC: Add RPC client
Diffstat (limited to 'libs/rpcc/luasrc/rpcc.lua')
-rw-r--r--libs/rpcc/luasrc/rpcc.lua84
1 files changed, 84 insertions, 0 deletions
diff --git a/libs/rpcc/luasrc/rpcc.lua b/libs/rpcc/luasrc/rpcc.lua
new file mode 100644
index 0000000000..ef94d3bbd5
--- /dev/null
+++ b/libs/rpcc/luasrc/rpcc.lua
@@ -0,0 +1,84 @@
+--[[
+LuCIRPCc
+(c) 2009 Steven Barth <steven@midlink.org>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+]]--
+
+local util = require "luci.util"
+local json = require "luci.json"
+local ltn12 = require "luci.ltn12"
+local nixio = require "nixio", require "nixio.util"
+
+local tostring, assert, setmetatable = tostring, assert, setmetatable
+local error = error
+
+--- LuCI RPC Client.
+-- @cstyle instance
+module "luci.rpcc"
+
+RQLIMIT = 32 * nixio.const.buffersize
+
+--- Create a new JSON-RPC stream client.
+-- @class function
+-- @param fd File descriptor
+-- @param v1 Use protocol version 1.0
+-- @return RPC Client
+Client = util.class()
+
+function Client.__init__(self, fd, v1)
+ self.fd = fd
+ self.uniqueid = tostring(self):match("0x([a-f0-9]+)")
+ self.msgid = 1
+ self.v1 = v1
+end
+
+--- Request an RP call and get the response.
+-- @param method Remote method
+-- @param params Parameters
+-- @param notification Notification only?
+-- @return response
+function Client.request(self, method, params, notification)
+ local oldchunk = self.decoder and self.decoder.chunk
+ self.decoder = json.ActiveDecoder(self.fd:blocksource(nil, RQLIMIT))
+ self.decoder.chunk = oldchunk
+
+ local reqid = self.msgid .. self.uniqueid
+ local reqdata = json.Encoder({
+ id = (not notification) and (self.msgid .. self.uniqueid) or nil,
+ jsonrpc = (not self.v1) and "2.0" or nil,
+ method = method,
+ params = params
+ })
+ ltn12.pump.all(reqdata:source(), self.fd:sink())
+ if not notification then
+ self.msgid = self.msgid + 1
+ local response = self.decoder:get()
+ assert(response.id == reqid, "Invalid response id")
+ if response.error then
+ error(response.error.message or response.error)
+ end
+ return response.result
+ end
+end
+
+--- Create a transparent RPC proxy.
+-- @param prefix Method prefix
+-- @return RPC Proxy object
+function Client.proxy(self, prefix)
+ prefix = prefix or ""
+ return setmetatable({}, {
+ __call = function(proxy, ...)
+ return self:request(prefix, {...})
+ end,
+ __index = function(proxy, name)
+ return self:proxy(prefix .. name .. ".")
+ end
+ })
+end \ No newline at end of file