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mirror of https://github.com/Doodle3D/doodle3d-firmware.git synced 2024-12-22 11:03:48 +01:00

Fix response sending when init() fails; create config.lua to contain global configuration; improve API function resolution; improve API code structure.

This commit is contained in:
Wouter R 2013-07-10 00:32:43 +02:00
parent 6caa7d244e
commit 1ac3f130ff
7 changed files with 216 additions and 197 deletions

20
TODO.md
View File

@ -1,10 +1,16 @@
# TODO (new functionality)
- save requested mod+func in request, as well as resolved function/pretty print version/function pointer (or subset…); then fix endpoint function name (when called with blank argument) in response objects to show pretty print name
- fix init script handling as described here: http://wiki.openwrt.org/doc/devel/packages#packaging.a.service
- write a simple client script to autotest as much of the api as possible
extend the client script to run arbitrary post/get requests
- document REST API (mention rq IDs and endpoint information, list endpoints+args+CRUD type, unknown values are empty fields)
(describe fail/error difference: fail is valid rq..could not comply, while error is invalid rq _or_ system error)
- implement (automated) test code where possible
* in 'test' dir next to 'src', with API tests under 'test/www/'
* www tests check functionality of the test module
* www tests also provide an interface to run arbitrary get/post requests
- document REST API
* fail/error difference: fail is a valid rq aka 'could not comply', while error is invalid rq _or_ system error
* modules/functions prefixed with '_' are for internal use
* rq IDs and endpoint information can be supplied (but it's probably not useful after all)
* list endpoints+args+CRUD type
* success/fail/error statuses are justified by drupal api
* unknown values (e.g. in network info) are either empty or unmentioned fields
- use a slightly more descriptive success/error definition (e.g. errortype=system/missing-arg/generic)
- steps to take regarding versioning/updating
* versioning scheme
@ -17,7 +23,9 @@
* expose through info API and/or system API; also provide a way (future) to flash a new image
- dynamic AP name based on partial MAC (set once on installation and then only upon explicit request? (e.g. api/config/wifiname/default))
- require api functions which change state to be invoked as post request
- add API functions to test network connectivity in steps (ifup? hasip? resolve? ping?) to network or test
* can this be modelled like java annotations or c function attributes?
* otherwise maybe pair each function with <func>_attribs = {…}?
- add API functions to test network connectivity in steps (any chance(e.g. ~ap)? ifup? hasip? resolve? ping?) to network or test
- add more config options to package, which should act as defaults for a config file on the system; candidates:
reconf.WWW_RENAME_NAME, wifihelper.{AP_ADDRESS, AP_NETMASK, (NET)}
<https://github.com/2ion/ini.lua>

10
src/config.lua Normal file
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@ -0,0 +1,10 @@
local M = {}
--NOTE: pcall protects from invocation exceptions, which is what we need except
--during debugging. This flag replaces them with a normal call so we can inspect stack traces.
M.DEBUG_PCALLS = true
--REST responses will contain 'module' and 'function' keys describing what was requested
M.API_INCLUDE_ENDPOINT_INFO = true
return M

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@ -3,12 +3,7 @@ local RequestClass = require("rest.request")
local ResponseClass = require("rest.response")
local wifi = require("network.wlanconfig")
local netconf = require("network.netconfig")
--NOTE: pcall protects from invocation exceptions, which is what we need except
--during debugging. This flag replaces them with a normal call so we can inspect stack traces.
local DEBUG_PCALLS = true
local config = require("config")
local postData = nil
@ -21,7 +16,7 @@ local function init()
l:init(l.LEVEL.debug)
l:setStream(io.stderr)
if DEBUG_PCALLS then l:info("Wifibox CGI handler started (pcall debugging enabled)")
if config.DEBUG_PCALLS then l:info("Wifibox CGI handler started (pcall debugging enabled)")
else l:info("Wifibox CGI handler started")
end
@ -41,7 +36,7 @@ local function init()
end
local function main()
local rq = RequestClass.new(postData, DEBUG_PCALLS) -- initializes itself using various environment variables and the arg array
local rq = RequestClass.new(postData, config.DEBUG_PCALLS)
l:info("received request of type " .. rq:getRequestMethod() .. " with arguments: " .. l:dump(rq:getAll()))
if rq:getRequestMethod() ~= "CMDLINE" then
@ -49,7 +44,7 @@ end
l:debug("user agent: " .. rq:getUserAgent())
end
if (not DEBUG_PCALLS and rq:getRequestMethod() == "CMDLINE") then
if (not config.DEBUG_PCALLS and rq:getRequestMethod() == "CMDLINE") then
if rq:get("autowifi") ~= nil then
setupAutoWifiMode()
else
@ -65,12 +60,17 @@ end
end
end
---'entry point'---
local s, msg = init()
if s == false then
local resp = ResponseClass.new()
resp:setError("initialization failed (" .. msg .. ")")
resp:send() --FIXME: this message does not seem to be sent
l:error("initialization failed (" .. msg .. ")") --NOTE: this assumes the logger has been inited properly, despite init() having failed
local errSuffix = msg and " (" .. msg .. ")" or ""
resp:setError("initialization failed" .. errSuffix)
io.write ("Content-type: text/plain\r\n\r\n")
resp:send()
l:error("initialization failed" .. errSuffix) --NOTE: this assumes the logger has been inited properly, despite init() having failed
os.exit(1)
else
main()

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@ -8,21 +8,20 @@ local M = {}
M.isApi = true
function M._global(d)
local r = ResponseClass.new(d)
r:setError("not implemented")
return r
function M._global(request, response)
response:setError("not implemented")
end
--accepts API argument 'nofilter'(bool) to disable filtering of APs and 'self'
function M.available(d)
local r = ResponseClass.new(d)
local noFilter = u.toboolean(d:get("nofilter"))
--accepts with_raw(bool) to include raw table dump
function M.available(request, response)
local noFilter = u.toboolean(request:get("nofilter"))
local withRaw = u.toboolean(request:get("with_raw"))
local sr = wifi.getScanInfo()
local si, se
if sr and #sr > 0 then
r:setSuccess("")
response:setSuccess("")
local netInfoList = {}
for _, se in ipairs(sr) do
if noFilter or se.mode ~= "ap" and se.ssid ~= wifi.AP_SSID then
@ -36,26 +35,25 @@ function M.available(d)
netInfo["signal"] = se.signal
netInfo["quality"] = se.quality
netInfo["quality_max"] = se.quality_max
--netInfo["raw"] = l:dump(se) --TEMP for debugging only
if withRaw then netInfo["_raw"] = l:dump(se) end
table.insert(netInfoList, netInfo)
end
end
r:addData("count", #netInfoList)
r:addData("networks", netInfoList)
response:addData("count", #netInfoList)
response:addData("networks", netInfoList)
else
r:setFail("No scan results or scanning not possible")
response:setFail("No scan results or scanning not possible")
end
return r
end
--accepts API argument 'nofilter'(bool) to disable filtering of APs and 'self'
function M.known(d)
local r = ResponseClass.new(d)
local noFilter = u.toboolean(d:get("nofilter"))
--accepts with_raw(bool) to include raw table dump
function M.known(request, response)
local noFilter = u.toboolean(request:get("nofilter"))
local withRaw = u.toboolean(request:get("with_raw"))
r:setSuccess()
response:setSuccess()
local netInfoList = {}
for _, net in ipairs(wifi.getConfigs()) do
if noFilter or net.mode == "sta" then
@ -64,47 +62,43 @@ function M.known(d)
netInfo["bssid"] = net.bssid or ""
netInfo["channel"] = net.channel or ""
netInfo["encryption"] = net.encryption
--netInfo["raw"] = l:dump(net) --TEMP for debugging only
if withRaw then netInfo["_raw"] = l:dump(net) end
table.insert(netInfoList, netInfo)
end
end
r:addData("count", #netInfoList)
r:addData("networks", netInfoList)
return r
response:addData("count", #netInfoList)
response:addData("networks", netInfoList)
end
function M.state(d)
local r = ResponseClass.new(d)
--accepts with_raw(bool) to include raw table dump
function M.state(request, response)
local withRaw = u.toboolean(request:get("with_raw"))
local ds = wifi.getDeviceState()
r:setSuccess()
r:addData("ssid", ds.ssid or "")
r:addData("bssid", ds.bssid or "")
r:addData("channel", ds.channel or "")
r:addData("mode", ds.mode)
r:addData("encryption", ds.encryption)
r:addData("quality", ds.quality)
r:addData("quality_max", ds.quality_max)
r:addData("txpower", ds.txpower)
r:addData("signal", ds.signal)
r:addData("noise", ds.noise)
--r:addData("raw", l:dump(ds)) --TEMP for debugging only
return r
response:setSuccess()
response:addData("ssid", ds.ssid or "")
response:addData("bssid", ds.bssid or "")
response:addData("channel", ds.channel or "")
response:addData("mode", ds.mode)
response:addData("encryption", ds.encryption)
response:addData("quality", ds.quality)
response:addData("quality_max", ds.quality_max)
response:addData("txpower", ds.txpower)
response:addData("signal", ds.signal)
response:addData("noise", ds.noise)
if withRaw then response:addData("_raw", l:dump(ds)) end
end
--UNTESTED
--requires ssid(string), accepts phrase(string), recreate(bool)
function M.assoc(d)
local r = ResponseClass.new(d)
local argSsid = d:get("ssid")
local argPhrase = d:get("phrase")
local argRecreate = d:get("recreate")
function M.assoc(request, response)
local argSsid = request:get("ssid")
local argPhrase = request:get("phrase")
local argRecreate = request:get("recreate")
if argSsid == nil or argSsid == "" then
r:setError("missing ssid argument")
return r
response:setError("missing ssid argument")
return
end
local cfg = nil
@ -121,65 +115,53 @@ function M.assoc(d)
wifi.createConfigFromScanInfo(scanResult, argPhrase)
else
--check for error
r:setFail("no wireless network with requested SSID is available")
r:addData("ssid", argSsid)
response:setFail("no wireless network with requested SSID is available")
response:addData("ssid", argSsid)
return
end
end
wifi.activateConfig(argSsid)
netconf.switchConfiguration{ wifiiface="add", apnet="rm", staticaddr="rm", dhcppool="rm", wwwredir="rm", dnsredir="rm", wwwcaptive="rm", wireless="reload" }
r:setSuccess("wlan associated")
r:addData("ssid", argSsid)
return r
response:setSuccess("wlan associated")
response:addData("ssid", argSsid)
end
--UNTESTED
function M.disassoc(d)
local r = ResponseClass.new(d)
function M.disassoc(request, response)
wifi.activateConfig()
local rv = wifi.restart()
r:setSuccess("all wireless networks deactivated")
r:addData("wifi_restart_result", rv)
return r
response:setSuccess("all wireless networks deactivated")
response:addData("wifi_restart_result", rv)
end
--UNTESTED
function M.openap(d)
local r = ResponseClass.new(d)
function M.openap(request, response)
--add AP net, activate it, deactivate all others, reload network/wireless config, add all dhcp and captive settings and reload as needed
netconf.switchConfiguration{apnet="add_noreload"}
wifi.activateConfig(wifi.AP_SSID)
netconf.switchConfiguration{ wifiiface="add", network="reload", staticaddr="add", dhcppool="add", wwwredir="add", dnsredir="add", wwwcaptive="add" }
r:setSuccess("switched to Access Point mode")
r:addData("ssid", wifi.AP_SSID)
return r
response:setSuccess("switched to Access Point mode")
response:addData("ssid", wifi.AP_SSID)
end
--UNTESTED
--requires ssid(string)
function M.rm(d)
local r = ResponseClass.new(d)
local argSsid = d:get("ssid")
function M.rm(request, response)
local argSsid = request:get("ssid")
if argSsid == nil or argSsid == "" then
r:setError("missing ssid argument")
return r
response:setError("missing ssid argument")
return
end
if wifi.removeConfig(argSsid) then
r:setSuccess("removed wireless network with requested SSID")
r:addData("ssid", argSsid)
response:setSuccess("removed wireless network with requested SSID")
response:addData("ssid", argSsid)
else
r:setFail("no wireless network with requested SSID") --this used to be a warning instead of an error...
r:addData("ssid", argSsid)
response:setFail("no wireless network with requested SSID") --this used to be a warning instead of an error...
response:addData("ssid", argSsid)
end
return r
end
return M

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@ -5,42 +5,31 @@ local M = {}
M.isApi = true
function M._global(d)
local r = ResponseClass.new(d)
local ba = d:getBlankArgument()
function M._global(request, response)
local ba = request:getBlankArgument()
r:setSuccess("REST test API - default function called with blank argument: '" .. (ba or "<nil>") .. "'")
if ba ~= nil then r:addData("blank_argument", ba) end
return r
response:setSuccess("REST test API - default function called with blank argument: '" .. (ba or "<nil>") .. "'")
if ba ~= nil then response:addData("blank_argument", ba) end
end
function M.success(d)
local r = ResponseClass.new(d)
r:setSuccess("this successful response has been generated on purpose")
r:addData("url", "http://xkcd.com/349/")
return r
function M.success(request, response)
response:setSuccess("this successful response has been generated on purpose")
response:addData("url", "http://xkcd.com/349/")
end
function M.fail(d)
local r = ResponseClass.new(d)
r:setFail("this failure has been generated on purpose")
r:addData("url", "http://xkcd.com/336/")
return r
function M.fail(request, response)
response:setFail("this failure has been generated on purpose")
response:addData("url", "http://xkcd.com/336/")
end
function M.error(d)
local r = ResponseClass.new(d)
r:setError("this error has been generated on purpose")
r:addData("url", "http://xkcd.com/1024/")
return r
function M.error(request, response)
response:setError("this error has been generated on purpose")
response:addData("url", "http://xkcd.com/1024/")
end
function M.echo(d)
local r = ResponseClass.new(d)
r:setSuccess("request echo")
r:addData("request_data", d)
return r
function M.echo(request, response)
response:setSuccess("request echo")
response:addData("request_data", request)
end
return M

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@ -1,4 +1,5 @@
local urlcode = require("util.urlcode")
local config = require("config")
local ResponseClass = require("rest.response")
local M = {}
@ -6,12 +7,24 @@ M.__index = M
local GLOBAL_API_FUNCTION_NAME = "_global"
--NOTE: requestedApi* contain what was extracted from the request data
-- regarding the other variables: either both resolvedApiFunction and realApiFunctionName
-- are nil and resolutionError is not, or exactly the other way around
M.requestedApiModule = nil
M.requestedApiFunction = nil
M.resolvedApiFunction = nil --will contain function address, or nil
M.realApiFunctionName = nil --will contain requested name, or global name, or nil
M.resolutionError = nil --non-nil means function could not be resolved
local function kvTableFromUrlEncodedString(encodedText)
local args = {}
if (encodedText ~= nil) then
urlcode.parsequery(encodedText, args)
end
return args
end
local function kvTableFromArray(argArray)
@ -30,12 +43,53 @@ local function kvTableFromArray(argArray)
end
--returns either a module object, or nil+errmsg
local function resolveApiModule(modname)
if modname == nil then return nil, "missing module name" end
if string.find(modname, "_") == 1 then return nil, "module names starting with '_' are preserved for internal use" end
local reqModName = "rest.api.api_" .. modname
local ok, modObj
if config.DEBUG_PCALLS then ok, modObj = true, require(reqModName)
else ok, modObj = pcall(require, reqModName)
end
if ok == false then return nil, "API module does not exist" end
if modObj == nil then return nil, "API module could not be found" end
if modObj.isApi ~= true then return nil, "module is not part of the CGI API" end
return modObj
end
--returns funcobj+nil (usual), funcobj+number (global func with blank arg), or nil+errmsg (unresolvable or inaccessible)
local function resolveApiFunction(modname, funcname)
if funcname and string.find(funcname, "_") == 1 then return nil, "function names starting with '_' are preserved for internal use" end
local mod, msg = resolveApiModule(modname)
if (funcname == nil or funcname == '') then funcname = GLOBAL_API_FUNCTION_NAME end --treat empty function name as nil
local f = mod[funcname]
local funcNumber = tonumber(funcname)
if (type(f) == "function") then
return f
elseif funcNumber ~= nil then
return mod[GLOBAL_API_FUNCTION_NAME], funcNumber
else
return nil, ("function '" .. funcname .. "' does not exist in API module '" .. modname .. "'")
end
end
setmetatable(M, {
__call = function(cls, ...)
return cls.new(...)
end
})
--This function initializes itself using various environment variables, the arg array and the given postData
--NOTE: if debugging is enabled, commandline arguments 'm' and 'f' override requested module and function
function M.new(postData, debug)
local self = setmetatable({}, M)
@ -54,30 +108,54 @@ function M.new(postData, debug)
self.postArgs = kvTableFromUrlEncodedString(postData)
--TEMP: until these can be extracted from the url path itself
self.apiModule = self.getArgs["m"]
self.apiFunction = self.getArgs["f"]
self.requestedApiModule = self.getArgs["m"]
self.requestedApiFunction = self.getArgs["f"]
if debug then
self.apiModule = self.cmdLineArgs["m"] or self.apiModule
self.apiFunction = self.cmdLineArgs["f"] or self.apiFunction
self.requestedApiModule = self.cmdLineArgs["m"] or self.requestedApiModule
self.requestedApiFunction = self.cmdLineArgs["f"] or self.requestedApiFunction
end
if self.requestedApiModule == "" then self.requestedApiModule = nil end
if self.requestedApiFunction == "" then self.requestedApiFunction = nil end
-- Perform module/function resolution
--TODO: improve naming and perhaps argument passing
local sfunc, sres = resolveApiFunction(self:getRequestedApiModule(), self:getRequestedApiFunction())
if sfunc ~= nil then --function (possibly the global one) could be resolved
self.resolvedApiFunction = sfunc
if sres ~= nil then --apparently it was the global one, and we received a 'blank argument'
self:setBlankArgument(sres)
self.realApiFunctionName = GLOBAL_API_FUNCTION_NAME
else --resolved without blank argument but still potentially the global function, hence the _or_ construction
self.realApiFunctionName = self:getRequestedApiFunction() or GLOBAL_API_FUNCTION_NAME
end
else
--instead of throwing an error, save the message for handle() which is expected to return a response anyway
self.resolutionError = sres
end
if self.apiModule == "" then self.apiModule = nil end
if self.apiFunction == "" then self.apiFunction = nil end
return self
end
--GET/POST/CMDLINE
function M:getRequestMethod()
return self.requestMethod
end
function M:getApiModule()
return self.apiModule
function M:getRequestedApiModule()
return self.requestedApiModule
end
function M:getApiFunction()
return self.apiFunction
function M:getRequestedApiFunction()
return self.requestedApiFunction
end
function M:getRealApiFunctionName()
return self.realApiFunctionName
end
function M:getBlankArgument()
@ -116,72 +194,29 @@ function M:getAll()
end
end
--returns either a module object, or nil+errmsg
local function resolveApiModule(modname)
if modname == nil then return nil, "missing module name" end
if string.find(modname, "_") == 1 then return nil, "module names starting with '_' are preserved for internal use" end
local reqModName = "rest.api.api_" .. modname
local ok, modObj
--TODO: create config.lua which contains DEBUG_PCALLS (nothing else for the moment)
if DEBUG_PCALLS then ok, modObj = true, require(reqModName)
else ok, modObj = pcall(require, reqModName)
end
if ok == false then return nil, "API module does not exist" end
if modObj == nil then return nil, "API module could not be found" end
if modObj.isApi ~= true then return nil, "module is not part of the CGI API" end
return modObj
end
--returns funcobj+nil (usual), funcobj+number (global func with blank arg), or nil+errmsg (unresolvable or inaccessible)
local function resolveApiFunction(modname, funcname)
if funcname and string.find(funcname, "_") == 1 then return nil, "function names starting with '_' are preserved for internal use" end
local mod, msg = resolveApiModule(modname)
if (funcname == nil or funcname == '') then funcname = GLOBAL_API_FUNCTION_NAME end --treat empty function name as nil
local f = mod[funcname]
local funcNumber = tonumber(funcname)
if (type(f) == "function") then
return f
elseif funcNumber ~= nil then
return mod[GLOBAL_API_FUNCTION_NAME], funcNumber
else
return nil, ("function '" .. funcname .. "' does not exist in API module '" .. modname .. "'")
end
end
--returns either a response object+nil, or response object+errmsg
function M:handle()
--TEMP: should be moved to init
local mod = self:getApiModule()
local func = self:getApiFunction()
local sf, sr = resolveApiFunction(mod, func)
local modname = self:getRequestedApiModule()
local resp = ResponseClass.new(self)
local resp = ResponseClass.new(rq) --TEMP: do not do this before resolving. after resolving has been moved to init that will be automatically true
if (sf ~= nil) then
if (sr ~= nil) then self:setBlankArgument(sr) end
if (self.resolvedApiFunction ~= nil) then --we found a function (possible the global function)
--invoke the function
local ok, r
if DEBUG_PCALLS then ok, r = true, sf(self)
else ok, r = pcall(sf, self)
if config.DEBUG_PCALLS then ok, r = true, self.resolvedApiFunction(self, resp)
else ok, r = pcall(self.resolvedApiFunction, self, resp)
end
--handle the result
if ok == true then
return r, nil
return resp, nil
else
resp:setError("call to function '" .. mod .. "/" .. sr .. "' failed")
return resp, ("calling function '" .. func .. "' in API module '" .. mod .. "' somehow failed ('" .. r .. "')")
resp:setError("call to function '" .. modname .. "/" .. self.realApiFunctionName .. "' failed")
return resp, ("calling function '" .. self.realApiFunctionName .. "' in API module '" .. modname .. "' somehow failed ('" .. r .. "')")
end
else
resp:setError("function unknown '" .. (mod or "<empty>") .. "/" .. (func or "<global>") .. "'")
return resp, ("could not resolve requested API function ('" .. sr .. "')")
resp:setError("function unknown '" .. (modname or "<empty>") .. "/" .. (self:getRequestedApiFunction() or "<empty>") .. "'")
return resp, ("could not resolve requested API function ('" .. self.resolutionError .. "')")
end
return resp

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@ -1,10 +1,10 @@
local JSON = (loadfile "util/JSON.lua")()
local config = require("config")
local M = {}
M.__index = M
local REQUEST_ID_ARGUMENT = "rq_id"
local INCLUDE_ENDPOINT_INFO = false
setmetatable(M, {
__call = function(cls, ...)
@ -22,20 +22,15 @@ function M.new(requestObject)
local rqId = requestObject:get(REQUEST_ID_ARGUMENT)
if rqId ~= nil then self.body[REQUEST_ID_ARGUMENT] = rqId end
if INCLUDE_ENDPOINT_INFO == true then
self.body["module"] = requestObject:getApiModule()
self.body["function"] = requestObject:getApiFunction() or ""
if config.API_INCLUDE_ENDPOINT_INFO == true then
self.body["module"] = requestObject:getRequestedApiModule()
self.body["function"] = requestObject:getRealApiFunctionName() or ""
end
end
return self
end
--use set{Success|Fail|Error}()
--function M:setStatus(s)
-- self.body.status = s
--end
function M:setSuccess(msg)
self.body.status = "success"
if msg ~= "" then self.body.msg = msg end