manual

PanPipe

PanPipe is an application designed to do content blocking. Users can customize the interception rules and support powerful lua script.

Document

Basic Struct

-- TCP Part

function dorequest(tunnel, buf)
    return buf
end

function doresponse(tunnel, buf)
    -- must take care of content length
    -- when modify http raw
    -- e.g. we replace hello with same size

    return string.gsub(buf, "olleh", "hello")
end

-- HTTP Part

function should_handle_path(tunnel, context)
    if context.path == "/" then
        return true
    else
        return false
    end
end

-- if fakehttprequest's return value is not empty, there is not real request send out.
function fakehttprequest(tunnel, context)
    return {
        code = 200,
        body = "olleh dlrow",
        headers = {
            ["DupKey"] = {
                "ValueA", "ValueB"
            },
            ["TestB"] = "ValueC"
        }
    }
end

function dohttprequest(tunnel, context)
    context:setheader("another", "value")
end

function dohttpresponse(tunnel, context)
    -- content length will be changed automatically.
    context.body = string.gsub(context.body, "dlrow", "world! " .. _prop.hellokey)
end

-- hurge chunked response

-- dohttpresponse is ignored if dohttpresponse_chunk_* methods are set.
function dohttpresponse_chunk_start(tunnel, context)
end

function dohttpresponse_chunk(tunnel, context)
end

function dohttpresponse_chunk_end(tunnel, context)
end

APIs

Global

---

Method	Parameters	Return Type	Description
notify	message:string	void	display notification, works only ios 10+
invoke	identifier:string, method:string	status:boolean, results…	invoke method provide by other tasks.

Property	Type	Description
_prop	table	properties from the task’s edit panel.
_S	table	shared table inside the same task.
module	table	module map to export method for other tasks.
log	table	log library, e.g. log.debug(…)
base64	table	lbase64 library
cjson	table	lua-cjson library
utils	table	utils library

Samples

---

module define

-- identifier ppp.sample

function module.test_swap(a, b)
    return b, a
end

module usage in other task

local status,b,a = invoke("ppp.sample", "test_swap", 1, 2)
assert(status and b == 2 and a == 1)

context

---

Method	Parameters	Return Type	Description
setheader	key:string, value:string	void	set header by kv before request or after response, old header with the same key will be replaced. e.g. context:setheader("KEY", "VALUE")
addheader	key:string, value:string	void	set header by kv before request or after response, will merge with old header(if exist). e.g. context:addheader("KEY", "VALUE")
removeheader	key:string	void	remove header by key before request or after response.
chunks_gsub	src:string, dest:string	count:number	do string.gsub over current chunk and last chunk, only work inside dohttpresponse_chunk.
header_map	void	headers:table	get kv map from context, header with same key will be override.
header_string	void	headers:string	get headers in raw string format.

Property	Type	Description
headers	table	get header map, if there are more than one value for the same key, the value will be value list.
header_list	table	get header list, format [{key = xx, value = xx}, {key = xx, value = xx} ...]
body	string	get or set the body before request or after response
path	string	get or set the path before request, or get the path after response

fan

---

Method	Parameters	Return Type	Description
sleep	second:number	void	sleep for a while, e.g. fan.sleep(0.5)

utils

---

Method	Parameters	Return Type	Description
gettime	void	timestamp:number	get the current timestamp in double

log

---

trace,debug,info,warn,error

Method	Parameters	Return Type	Description
trace	…	void	log trace
isTrace	void	boolean	is trace