add file sending, request refactor, bugfixes

.gitignore

@@ -0,0 +1,3 @@
+# Emacs
+*~
+\#*#

etc/api/api.lua

@@ -7,7 +7,7 @@ local tools =require 'etc.api.tools'
 local json = require 'etc.json'
 local events=require 'etc.events'
 local api = {
-  request = function(s, ...) return tools.request(s.token, ...) end
+  request = function(s, ...) return tools.request(s.token, ...) end,
 }
 api.__index = api -- Make class
 

etc/api/tools.lua

@@ -7,9 +7,10 @@ local tools = {
   json = require 'etc.json',
 }
 
-local json = tools.json
+local json  = tools.json
 local https = require 'ssl.https'
 local ltn12 = require 'ltn12'
+local mp    = require 'etc.multipart'
 
 function tools.fetchCmd(text)
   return
@@ -17,30 +18,23 @@ function tools.fetchCmd(text)
     text:match '/[%w_]+@([%w_]+)' -- to
 end
 
--- https://gist.github.com/liukun/f9ce7d6d14fa45fe9b924a3eed5c3d99
-function tools.urlencode(url)
-  if url == nil then return end
-  url = url:gsub("\n", "\r\n")
-  url = url:gsub("([^%w_%- . ~])", function(c) return string.format("%%%02X", string.byte(c)) end)
-  url = url:gsub(" ", "+")
-  return url
-end
+function tools._req(url, meth, data, ctype)
+  assert(url,  'Provide URL!')
+  assert(meth, 'Provide method!')
 
-function tools.req(url, par)
-  if type(par) == 'table' then
-    url = url .. '?'
-    for k,v in pairs(par) do
-      url = url ..'&'.. k ..'='.. tools.urlencode(tostring(v))
-    end
-  end
-  
   local resp = {}
-  local succ, res = https.request {
-    url = url,
-    method = 'GET',
-    sink = ltn12.sink.table(resp),
+  local head = {
+    url      = url,
+    method   = meth,
+    headers  = {
+      ['Content-Type']   = ctype,
+      ['Content-Length'] = #(data or ''),
+    },
+    source   = ltn12.source.string(data),
+    sink     = ltn12.sink.table(resp),
   }
 
+  local succ, res = https.request(head)
   if not succ then
     print('Connection error [' .. res .. ']')
     return nil, false
@@ -48,22 +42,61 @@ function tools.req(url, par)
   return resp[1], true
 end
 
-function tools.requ(url, par, dbg)
-  local res, succ = tools.req(url, par)
-  if dbg then print(url, succ, res) end
+function tools.preq(url, par)
+  par = par or {}
+
+  local body, bound = mp.encode(par)
+  return tools._req(
+    url,
+    'POST',
+    body,
+    'multipart/form-data; boundary=' .. bound
+  )
+end
+
+function tools.greq(url, par, f)
+  par = json.encode(par)
+  return tools._req(url, 'GET', par, 'application/json')
+end
+
+function tools.req(url, par, f, dbg)
+  local res, succ
+  par = par or {}
+
+  -- files
+  if f and next(f) ~= nil then
+    par = par or {}
+    for k, v in pairs(par) do par[k] = tostring(v) end
+    local ft, fn = next(f)
+    local fr = io.open(fn, 'r')
+    if fr then
+      par[ft] = {
+        filename = fn,
+	data = fr:read '*a'
+      }
+      fr:close()
+    else par[ft] = fn end
+    res, succ = tools.preq(url, par)
+  else -- text
+    res, succ = tools.greq(url, par)
+  end
+
+  if dbg then print(url, succ, res, par)
+    -- dump(par))
+  end
   res = json.decode(res or '{}')
   if not succ or not res then return {}, false end
   return res, true
 end
 
-function tools.request(token, endpoint, param, dbg)
+function tools.request(token, endpoint, param, f, dbg)
   assert(token, 'Provide token!')
   assert(endpoint, 'Provide endpoint!')
 
-  local url = 'https://api.telegram.org/bot' .. token .. '/' .. endpoint
+  local url = 'https://api.telegram.org/bot' ..token.. '/' ..endpoint
 
   -- dbg = true
-  local resp = tools.requ(url, param, dbg)
+  local resp = tools.req(url, param, f, dbg)
   return resp, resp.ok or false
 end
 

etc/multipart.lua

@@ -0,0 +1,167 @@
+-- based on https://github.com/catwell/lua-multipart-post
+-- MIT License
+
+local ltn12 = require 'ltn12'
+local mp = {
+  CHARSET  = 'UTF-8',
+  LANGUAGE = ''
+}
+
+-- https://gist.github.com/liukun/f9ce7d6d14fa45fe9b924a3eed5c3d99
+local function urlencode(url)
+  if url == nil then return end
+  url = url:gsub("\n", "\r\n")
+  url = url:gsub("([^%w_%- . ~])", function(c) return string.format("%%%02X", string.byte(c)) end)
+  url = url:gsub(" ", "+")
+  return url
+end
+mp.urlencode = urlencode
+
+local function fmt(p, ...)
+  if select('#', ...) == 0 then
+    return p
+  end
+  return string.format(p, ...)
+end
+
+local function tprintf(t, p, ...)
+  t[#t+1] = fmt(p, ...)
+end
+
+local function section_header(r, k, extra)
+  tprintf(r, 'content-disposition: form-data; name="%s"', k)
+  if extra.filename then
+    tprintf(r, '; filename="%s"', extra.filename)
+    tprintf(
+      r, "; filename*=%s'%s'%s",
+      mp.CHARSET, mp.LANGUAGE, urlencode(extra.filename)
+    )
+  end
+  if extra.content_type then
+    tprintf(r, '\r\ncontent-type: %s', extra.content_type)
+  end
+  if extra.content_transfer_encoding then
+    tprintf(
+      r, '\r\ncontent-transfer-encoding: %s',
+      extra.content_transfer_encoding
+    )
+  end
+  tprintf(r, '\r\n\r\n')
+end
+
+function mp.boundary()
+  local t = {"BOUNDARY-"}
+  for i=2,17 do t[i] = string.char(math.random(65, 90)) end
+  t[18] = "-BOUNDARY"
+  return table.concat(t)
+end
+
+local function encode_header_to_table(r, k, v, boundary)
+  local _t = type(v)
+
+  tprintf(r, "--%s\r\n", boundary)
+  if _t == "string" then
+    section_header(r, k, {})
+  elseif _t == "table" then
+    assert(v.data, "invalid input")
+    local extra = {
+      filename = v.filename or v.name,
+      content_type = v.content_type or v.mimetype
+        or "application/octet-stream",
+      content_transfer_encoding = v.content_transfer_encoding
+        or "binary",
+    }
+    section_header(r, k, extra)
+  else
+    error(string.format("unexpected type %s", _t))
+  end
+end
+
+local function encode_header_as_source(k, v, boundary, ctx)
+  local r = {}
+  encode_header_to_table(r, k, v, boundary, ctx)
+  local s = table.concat(r)
+  if ctx then
+    ctx.headers_length = ctx.headers_length + #s
+  end
+  return ltn12.source.string(s)
+end
+
+local function data_len(d)
+  local _t = type(d)
+
+  if _t == "string" then
+    return string.len(d)
+  elseif _t == "table" then
+    if type(d.data) == "string" then
+      return string.len(d.data)
+    end
+    if d.len then return d.len end
+    error("must provide data length for non-string datatypes")
+  end
+end
+
+local function content_length(t, boundary, ctx)
+  local r = ctx and ctx.headers_length or 0
+  for k, v in pairs(t) do
+    if not ctx then
+      local tmp = {}
+      encode_header_to_table(tmp, k, v, boundary)
+      r = r + #table.concat(tmp)
+    end
+    r = r + data_len(v) + 2 -- `\r\n`
+  end
+  return r + #boundary + 6 -- `--BOUNDARY--\r\n`
+end
+
+local function get_data_src(v)
+  local _t = type(v)
+  if v.source then
+    return v.source
+  elseif _t == "string" then
+    return ltn12.source.string(v)
+  elseif _t == "table" then
+    _t = type(v.data)
+    if _t == "string" then
+      return ltn12.source.string(v.data)
+    elseif _t == "table" then
+      return ltn12.source.table(v.data)
+    elseif _t == "userdata" then
+      return ltn12.source.file(v.data)
+    elseif _t == "function" then
+      return v.data
+    end
+  end
+  error("invalid input")
+end
+
+local function set_ltn12_blksz(sz)
+  assert(type(sz) == "number", "set_ltn12_blksz expects a number")
+  ltn12.BLOCKSIZE = sz
+end
+mp.set_ltn12_blksz = set_ltn12_blksz
+
+local function source(t, boundary, ctx)
+  local sources, n = {}, 1
+  for k, v in pairs(t) do
+    sources[n] = encode_header_as_source(k, v, boundary, ctx)
+    sources[n+1] = get_data_src(v)
+    sources[n+2] = ltn12.source.string("\r\n")
+    n = n + 3
+  end
+  sources[n] = ltn12.source.string(string.format("--%s--\r\n", boundary))
+  return ltn12.source.cat(table.unpack(sources))
+end
+mp.source = source
+
+function mp.encode(t, boundary)
+  boundary = boundary or mp.boundary()
+  local r = {}
+  assert(ltn12.pump.all(
+    (source(t, boundary)),
+    (ltn12.sink.table(r))
+  ))
+  return table.concat(r), boundary
+end
+
+return mp

src/cmds/rub.lua

@@ -10,8 +10,9 @@ local rub = {
 }
 
 function rub:course(wants)
-  local resp, succ = self.tools.requ(self.url)
+  local resp, succ = self.tools._req(self.url, 'GET')
   if not succ then return 'err' end
+  resp = self.tools.json.decode(resp or '{}')
 
   resp = resp.ValCurs
   table.insert(resp.Valute, {

src/events/command.lua

@@ -22,7 +22,7 @@
       local cid = C.config.owner
       api:forward(cid, msg.chat.id, msg.message_id, false)
       api:send(cid, err)
-      api:reply(msg, msg.locale.error.not_suc)
+      api:reply(msg, C.locale:get('error', 'not_suc', l))
     end
   end
-end
+end

src/locales/ru.json

@@ -2,7 +2,7 @@
   "error": {
     "inv_cmd": "Указана неизвестная команда.",
     "adm_cmd": "Вы не можете исполнять админские команды!",
-    "cmd_run": "Это команда не мжет быть выполнена сейчас.",
+    "cmd_run": "Это команда не может быть выполнена сейчас.",
     "not_suc": "Произошла ошибка, которая уже отправлена создателю.",
     "unk_err": "Неизвестная ошибка.",
     "req_err": "Ошибка запроса."