moonbridge

annotate moonbridge_http.lua @ 167:625ab06babe9

Use old system for GET/POST param tables in new HTTP module implementation
author jbe
date Mon Jun 15 00:07:08 2015 +0200 (2015-06-15)
parents 41a44ae5c293
children d4f5d6a7d401
rev   line source
jbe@0 1 #!/usr/bin/env lua
jbe@0 2
jbe@0 3 -- module preamble
jbe@0 4 local _G, _M = _ENV, {}
jbe@0 5 _ENV = setmetatable({}, {
jbe@0 6 __index = function(self, key)
jbe@0 7 local value = _M[key]; if value ~= nil then return value end
jbe@0 8 return _G[key]
jbe@0 9 end,
jbe@63 10 __newindex = _M
jbe@0 11 })
jbe@0 12
jbe@0 13 -- function that encodes certain HTML entities:
jbe@0 14 -- (not used by the library itself)
jbe@0 15 function encode_html(text)
jbe@0 16 return (
jbe@0 17 string.gsub(
jbe@0 18 text, '[<>&"]',
jbe@0 19 function(char)
jbe@0 20 if char == '<' then
jbe@0 21 return "&lt;"
jbe@0 22 elseif char == '>' then
jbe@0 23 return "&gt;"
jbe@0 24 elseif char == '&' then
jbe@0 25 return "&amp;"
jbe@0 26 elseif char == '"' then
jbe@0 27 return "&quot;"
jbe@0 28 end
jbe@0 29 end
jbe@0 30 )
jbe@0 31 )
jbe@0 32
jbe@0 33 end
jbe@0 34
jbe@0 35 -- function that encodes special characters for URIs:
jbe@0 36 -- (not used by the library itself)
jbe@0 37 function encode_uri(text)
jbe@0 38 return (
jbe@0 39 string.gsub(text, "[^0-9A-Za-z_%.~-]",
jbe@0 40 function (char)
jbe@0 41 return string.format("%%%02x", string.byte(char))
jbe@0 42 end
jbe@0 43 )
jbe@0 44 )
jbe@0 45 end
jbe@0 46
jbe@0 47 -- function undoing URL encoding:
jbe@0 48 do
jbe@0 49 local b0 = string.byte("0")
jbe@0 50 local b9 = string.byte("9")
jbe@0 51 local bA = string.byte("A")
jbe@0 52 local bF = string.byte("F")
jbe@0 53 local ba = string.byte("a")
jbe@0 54 local bf = string.byte("f")
jbe@0 55 function decode_uri(str)
jbe@0 56 return (
jbe@0 57 string.gsub(
jbe@0 58 string.gsub(str, "%+", " "),
jbe@0 59 "%%([0-9A-Fa-f][0-9A-Fa-f])",
jbe@0 60 function(hex)
jbe@0 61 local n1, n2 = string.byte(hex, 1, 2)
jbe@0 62 if n1 >= b0 and n1 <= b9 then n1 = n1 - b0
jbe@0 63 elseif n1 >= bA and n1 <= bF then n1 = n1 - bA + 10
jbe@0 64 elseif n1 >= ba and n1 <= bf then n1 = n1 - ba + 10
jbe@0 65 else error("Assertion failed") end
jbe@0 66 if n2 >= b0 and n2 <= b9 then n2 = n2 - b0
jbe@0 67 elseif n2 >= bA and n2 <= bF then n2 = n2 - bA + 10
jbe@0 68 elseif n2 >= ba and n2 <= bf then n2 = n2 - ba + 10
jbe@0 69 else error("Assertion failed") end
jbe@0 70 return string.char(n1 * 16 + n2)
jbe@0 71 end
jbe@0 72 )
jbe@0 73 )
jbe@0 74 end
jbe@0 75 end
jbe@0 76
jbe@0 77 -- status codes that carry no response body (in addition to 1xx):
jbe@0 78 -- (set to "zero_content_length" if Content-Length header is required)
jbe@0 79 status_without_response_body = {
jbe@5 80 ["101"] = true, -- list 101 to allow protocol switch
jbe@0 81 ["204"] = true,
jbe@0 82 ["205"] = "zero_content_length",
jbe@0 83 ["304"] = true
jbe@0 84 }
jbe@0 85
jbe@167 86 -- handling of GET/POST param tables:
jbe@167 87 local new_params_list -- defined later
jbe@167 88 do
jbe@167 89 local params_list_mapping = setmetatable({}, {__mode="k"})
jbe@167 90 local function nextnonempty(tbl, key)
jbe@167 91 while true do
jbe@167 92 key = next(tbl, key)
jbe@167 93 if key == nil then
jbe@167 94 return nil
jbe@167 95 end
jbe@167 96 local value = tbl[key]
jbe@167 97 if #value > 0 then
jbe@167 98 return key, value
jbe@167 99 end
jbe@35 100 end
jbe@35 101 end
jbe@167 102 local function nextvalue(tbl, key)
jbe@167 103 key = next(tbl, key)
jbe@167 104 if key == nil then
jbe@167 105 return nil
jbe@167 106 end
jbe@167 107 return key, tbl[key][1]
jbe@167 108 end
jbe@167 109 local params_list_metatable = {
jbe@167 110 __index = function(self, key)
jbe@167 111 local tbl = {}
jbe@167 112 self[key] = tbl
jbe@167 113 return tbl
jbe@167 114 end,
jbe@167 115 __pairs = function(self)
jbe@167 116 return nextnonempty, self, nil
jbe@167 117 end
jbe@167 118 }
jbe@167 119 local params_metatable = {
jbe@167 120 __index = function(self, key)
jbe@167 121 return params_list_mapping[self][key][1]
jbe@167 122 end,
jbe@167 123 __newindex = function(self, key, value)
jbe@167 124 params_list_mapping[self][key] = {value}
jbe@167 125 end,
jbe@167 126 __pairs = function(self)
jbe@167 127 return nextvalue, params_list_mapping[self], nil
jbe@167 128 end
jbe@167 129 }
jbe@167 130 -- returns a table to store key value-list pairs (i.e. multiple values),
jbe@167 131 -- and a second table automatically mapping keys to the first value
jbe@167 132 -- using the key value-list pairs in the first table:
jbe@167 133 new_params_list = function()
jbe@167 134 local params_list = setmetatable({}, params_list_metatable)
jbe@167 135 local params = setmetatable({}, params_metatable)
jbe@167 136 params_list_mapping[params] = params_list
jbe@167 137 return params_list, params
jbe@167 138 end
jbe@167 139 end
jbe@167 140
jbe@167 141 -- parses URL encoded form data and stores it in
jbe@167 142 -- a key value-list pairs structure that has to be
jbe@167 143 -- previously obtained by calling by new_params_list():
jbe@167 144 local function read_urlencoded_form(tbl, data)
jbe@167 145 for rawkey, rawvalue in string.gmatch(data, "([^?=&]*)=([^?=&]*)") do
jbe@167 146 local subtbl = tbl[decode_uri(rawkey)]
jbe@167 147 subtbl[#subtbl+1] = decode_uri(rawvalue)
jbe@167 148 end
jbe@0 149 end
jbe@0 150
jbe@154 151 -- extracts first value from each subtable:
jbe@154 152 local function get_first_values(tbl)
jbe@154 153 local newtbl = {}
jbe@154 154 for key, subtbl in pairs(tbl) do
jbe@154 155 newtbl[key] = subtbl[1]
jbe@0 156 end
jbe@154 157 return newtbl
jbe@154 158 end
jbe@154 159
jbe@0 160 function generate_handler(handler, options)
jbe@0 161 -- swap arguments if necessary (for convenience):
jbe@0 162 if type(handler) ~= "function" and type(options) == "function" then
jbe@0 163 handler, options = options, handler
jbe@0 164 end
jbe@160 165 -- helper function to process options:
jbe@160 166 local function default(name, default_value)
jbe@160 167 local value = options[name]
jbe@160 168 if value == nil then
jbe@160 169 return default_value
jbe@160 170 else
jbe@160 171 return value or nil
jbe@159 172 end
jbe@160 173 end
jbe@0 174 -- process options:
jbe@0 175 options = options or {}
jbe@0 176 local preamble = "" -- preamble sent with every(!) HTTP response
jbe@0 177 do
jbe@0 178 -- named arg "static_headers" is used to create the preamble:
jbe@0 179 local s = options.static_headers
jbe@0 180 local t = {}
jbe@0 181 if s then
jbe@0 182 if type(s) == "string" then
jbe@0 183 for line in string.gmatch(s, "[^\r\n]+") do
jbe@0 184 t[#t+1] = line
jbe@0 185 end
jbe@0 186 else
jbe@0 187 for i, kv in ipairs(options.static_headers) do
jbe@0 188 if type(kv) == "string" then
jbe@0 189 t[#t+1] = kv
jbe@0 190 else
jbe@0 191 t[#t+1] = kv[1] .. ": " .. kv[2]
jbe@0 192 end
jbe@0 193 end
jbe@0 194 end
jbe@0 195 end
jbe@0 196 t[#t+1] = ""
jbe@0 197 preamble = table.concat(t, "\r\n")
jbe@0 198 end
jbe@160 199 local input_chunk_size = options.maximum_input_chunk_size or options.chunk_size or 16384
jbe@44 200 local output_chunk_size = options.minimum_output_chunk_size or options.chunk_size or 1024
jbe@160 201 local header_size_limit = options.header_size_limit or 1024*1024
jbe@160 202 local body_size_limit = options.body_size_limit or 64*1024*1024
jbe@160 203 local request_idle_timeout = default("request_idle_timeout", 330)
jbe@160 204 local request_header_timeout = default("request_header_timeout", 30)
jbe@160 205 local request_body_timeout = default("request_body_timeout", 60)
jbe@160 206 local request_response_timeout = default("request_response_timeout", 1800)
jbe@160 207 local poll = options.poll_function or moonbridge_io.poll
jbe@160 208 -- return socket handler:
jbe@0 209 return function(socket)
jbe@160 210 local socket_set = {[socket] = true} -- used for poll function
jbe@0 211 local survive = true -- set to false if process shall be terminated later
jbe@160 212 local consume -- function that reads some input if possible
jbe@160 213 -- function that drains some input if possible:
jbe@160 214 local function drain()
jbe@163 215 local bytes, status = socket:drain_nb(input_chunk_size)
jbe@163 216 if not bytes or status == "eof" then
jbe@160 217 consume = nil
jbe@50 218 end
jbe@159 219 end
jbe@163 220 -- function trying to unblock socket by reading:
jbe@160 221 local function unblock()
jbe@160 222 if consume then
jbe@160 223 poll(socket_set, socket_set)
jbe@160 224 consume()
jbe@160 225 else
jbe@160 226 poll(nil, socket_set)
jbe@0 227 end
jbe@154 228 end
jbe@163 229 -- function that enforces consumption of all input:
jbe@162 230 local function consume_all()
jbe@162 231 while consume do
jbe@163 232 poll(socket_set, nil)
jbe@162 233 consume()
jbe@162 234 end
jbe@162 235 end
jbe@163 236 -- handle requests in a loop:
jbe@160 237 repeat
jbe@166 238 -- table for caching nil values:
jbe@166 239 local headers_value_nil = {}
jbe@162 240 -- create a new request object:
jbe@166 241 local request -- allow references to local variable
jbe@166 242 request = {
jbe@165 243 -- allow access to underlying socket:
jbe@0 244 socket = socket,
jbe@165 245 -- cookies are simply stored in a table:
jbe@165 246 cookies = {},
jbe@165 247 -- table mapping header field names to value-lists
jbe@165 248 -- (raw access, but case-insensitive):
jbe@165 249 headers = setmetatable({}, {
jbe@165 250 __index = function(self, key)
jbe@165 251 local lowerkey = string.lower(key)
jbe@165 252 if lowerkey == key then
jbe@165 253 return
jbe@165 254 end
jbe@165 255 local result = rawget(self, lowerkey)
jbe@165 256 if result == nil then
jbe@165 257 result = {}
jbe@165 258 end
jbe@165 259 self[lowerkey] = result
jbe@165 260 self[key] = result
jbe@165 261 return result
jbe@165 262 end
jbe@165 263 }),
jbe@165 264 -- table mapping header field names to value-lists
jbe@165 265 -- (for headers with comma separated values):
jbe@165 266 headers_csv_table = setmetatable({}, {
jbe@165 267 __index = function(self, key)
jbe@165 268 local result = {}
jbe@165 269 for i, line in ipairs(request.headers[key]) do
jbe@165 270 for entry in string.gmatch(line, "[^,]+") do
jbe@165 271 local value = string.match(entry, "^[ \t]*(..-)[ \t]*$")
jbe@165 272 if value then
jbe@165 273 result[#result+1] = value
jbe@165 274 end
jbe@165 275 end
jbe@165 276 end
jbe@165 277 self[key] = result
jbe@165 278 return result
jbe@165 279 end
jbe@165 280 }),
jbe@165 281 -- table mapping header field names to a comma separated string
jbe@165 282 -- (for headers with comma separated values):
jbe@165 283 headers_csv_string = setmetatable({}, {
jbe@165 284 __index = function(self, key)
jbe@165 285 local result = {}
jbe@165 286 for i, line in ipairs(request.headers[key]) do
jbe@165 287 result[#result+1] = line
jbe@165 288 end
jbe@165 289 result = string.concat(result, ", ")
jbe@165 290 self[key] = result
jbe@165 291 return result
jbe@165 292 end
jbe@165 293 }),
jbe@165 294 -- table mapping header field names to a single string value
jbe@165 295 -- (or false if header has been sent multiple times):
jbe@165 296 headers_value = setmetatable({}, {
jbe@165 297 __index = function(self, key)
jbe@165 298 if headers_value_nil[key] then
jbe@165 299 return nil
jbe@165 300 end
jbe@165 301 local result = nil
jbe@165 302 local values = request.headers_csv_table[key]
jbe@165 303 if #values == 0 then
jbe@165 304 headers_value_nil[key] = true
jbe@165 305 elseif #values == 1 then
jbe@165 306 result = values[1]
jbe@165 307 else
jbe@165 308 result = false
jbe@165 309 end
jbe@165 310 self[key] = result
jbe@165 311 return result
jbe@165 312 end
jbe@165 313 }),
jbe@165 314 -- table mapping header field names to a flag table,
jbe@165 315 -- indicating if the comma separated value contains certain entries:
jbe@165 316 headers_flags = setmetatable({}, {
jbe@165 317 __index = function(self, key)
jbe@165 318 local result = setmetatable({}, {
jbe@165 319 __index = function(self, key)
jbe@165 320 local lowerkey = string.lower(key)
jbe@165 321 local result = rawget(self, lowerkey) or false
jbe@165 322 self[lowerkey] = result
jbe@165 323 self[key] = result
jbe@165 324 return result
jbe@165 325 end
jbe@165 326 })
jbe@165 327 for i, value in ipairs(request.headers_csv_table[key]) do
jbe@165 328 result[string.lower(value)] = true
jbe@165 329 end
jbe@165 330 self[key] = result
jbe@165 331 return result
jbe@165 332 end
jbe@165 333 })
jbe@0 334 }
jbe@162 335 -- local variables to track the state:
jbe@162 336 local state = "init" -- one of:
jbe@162 337 -- "init" (initial state)
jbe@163 338 -- "prepare" (configureation in preparation)
jbe@162 339 -- "no_status_sent" (configuration complete)
jbe@162 340 -- "info_status_sent" (1xx status code has been sent)
jbe@162 341 -- "bodyless_status_sent" (204/304 status code has been sent)
jbe@162 342 -- "status_sent" (regular status code has been sent)
jbe@162 343 -- "headers_sent" (headers have been terminated)
jbe@162 344 -- "finished" (request has been answered completely)
jbe@163 345 -- "faulty" (I/O or protocaol error)
jbe@162 346 local close_requested = false -- "Connection: close" requested
jbe@162 347 local close_responded = false -- "Connection: close" sent
jbe@162 348 local content_length = nil -- value of Content-Length header sent
jbe@164 349 local chunk_parts = {} -- list of chunks to send
jbe@164 350 local chunk_bytes = 0 -- sum of lengths of chunks to send
jbe@163 351 -- functions to assert proper output/closing:
jbe@163 352 local function assert_output(...)
jbe@163 353 local retval, errmsg = ...
jbe@163 354 if retval then return ... end
jbe@163 355 state = "faulty"
jbe@163 356 socket:reset()
jbe@163 357 error("Could not send data to client: " .. errmsg)
jbe@163 358 end
jbe@163 359 local function assert_close(...)
jbe@163 360 local retval, errmsg = ...
jbe@163 361 if retval then return ... end
jbe@163 362 state = "faulty"
jbe@163 363 error("Could not finish sending data to client: " .. errmsg)
jbe@163 364 end
jbe@164 365 -- function to assert non-faulty handle:
jbe@164 366 local function assert_not_faulty()
jbe@164 367 assert(state ~= "faulty", "Tried to use faulty request handle")
jbe@164 368 end
jbe@162 369 -- functions to send data to the browser:
jbe@160 370 local function send(...)
jbe@163 371 assert_output(socket:write_call(unblock, ...))
jbe@38 372 end
jbe@162 373 local function send_flush(...)
jbe@163 374 assert_output(socket:flush_call(unblock, ...))
jbe@162 375 end
jbe@163 376 -- function to finish request:
jbe@163 377 local function finish()
jbe@163 378 if close_responded then
jbe@163 379 -- discard any input:
jbe@163 380 consume = drain
jbe@163 381 -- close output stream:
jbe@163 382 send_flush()
jbe@163 383 assert_close(socket:finish())
jbe@163 384 -- wait for EOF of peer to avoid immediate TCP RST condition:
jbe@163 385 consume_all()
jbe@163 386 -- fully close socket:
jbe@163 387 assert_close(socket:close())
jbe@163 388 else
jbe@163 389 send_flush()
jbe@163 390 consume_all()
jbe@163 391 end
jbe@163 392 end
jbe@164 393 -- function that writes out buffered chunks (without flushing the socket):
jbe@164 394 function send_chunk()
jbe@164 395 if chunk_bytes > 0 then
jbe@164 396 assert_output(socket:write(string.format("%x\r\n", chunk_bytes)))
jbe@164 397 for i = 1, #chunk_parts do -- TODO: evaluated only once?
jbe@164 398 send(chunk_parts[i])
jbe@164 399 chunk_parts[i] = nil
jbe@164 400 end
jbe@164 401 chunk_bytes = 0
jbe@164 402 send("\r\n")
jbe@164 403 end
jbe@164 404 end
jbe@164 405 -- function to prepare (or skip) body processing:
jbe@162 406 local function prepare()
jbe@164 407 assert_not_faulty()
jbe@162 408 if state == "prepare" then
jbe@164 409 error("Unexpected internal status in HTTP engine (recursive prepare)")
jbe@162 410 elseif state ~= "init" then
jbe@162 411 return
jbe@162 412 end
jbe@162 413 state = "prepare"
jbe@162 414 -- TODO
jbe@162 415 state = "no_status_sent"
jbe@162 416 end
jbe@163 417 -- method to ignore input and close connection after response:
jbe@163 418 function request:monologue()
jbe@164 419 assert_not_faulty()
jbe@163 420 if
jbe@163 421 state == "headers_sent" or
jbe@163 422 state == "finished"
jbe@163 423 then
jbe@163 424 error("All HTTP headers have already been sent")
jbe@163 425 end
jbe@164 426 local old_state = state
jbe@164 427 state = "faulty"
jbe@163 428 consume = drain
jbe@163 429 close_requested = true
jbe@164 430 if old_state == "init" or old_state == "prepare" then -- TODO: ok?
jbe@163 431 state = "no_status_sent"
jbe@164 432 else
jbe@164 433 state = old_state
jbe@162 434 end
jbe@162 435 end
jbe@163 436 --
jbe@162 437 -- method to send a HTTP response status (e.g. "200 OK"):
jbe@162 438 function request:send_status(status)
jbe@162 439 prepare()
jbe@164 440 local old_state = state
jbe@164 441 state = "faulty"
jbe@164 442 if old_state == "info_status_sent" then
jbe@162 443 send_flush("\r\n")
jbe@164 444 elseif old_state ~= "no_status_sent" then
jbe@162 445 error("HTTP status has already been sent")
jbe@162 446 end
jbe@162 447 local status1 = string.sub(status, 1, 1)
jbe@162 448 local status3 = string.sub(status, 1, 3)
jbe@162 449 send("HTTP/1.1 ", status, "\r\n", preamble)
jbe@162 450 local wrb = status_without_response_body[status3]
jbe@162 451 if wrb then
jbe@162 452 state = "bodyless_status_sent"
jbe@162 453 if wrb == "zero_content_length" then
jbe@162 454 request:send_header("Content-Length", 0)
jbe@162 455 end
jbe@162 456 elseif status1 == "1" then
jbe@162 457 state = "info_status_sent"
jbe@162 458 else
jbe@162 459 state = "status_sent"
jbe@162 460 end
jbe@162 461 end
jbe@162 462 -- method to send a HTTP response header:
jbe@162 463 -- (key and value must be provided as separate args)
jbe@162 464 function request:send_header(key, value)
jbe@164 465 assert_not_faulty()
jbe@164 466 if
jbe@164 467 state == "init" or
jbe@164 468 state == "prepare" or
jbe@164 469 state == "no_status_sent"
jbe@164 470 then
jbe@162 471 error("HTTP status has not been sent yet")
jbe@162 472 elseif
jbe@164 473 state == "headers_sent" or
jbe@164 474 state == "finished"
jbe@162 475 then
jbe@162 476 error("All HTTP headers have already been sent")
jbe@162 477 end
jbe@162 478 local key_lower = string.lower(key)
jbe@162 479 if key_lower == "content-length" then
jbe@162 480 if state == "info_status_sent" then
jbe@162 481 error("Cannot set Content-Length for informational status response")
jbe@162 482 end
jbe@162 483 local cl = assert(tonumber(value), "Invalid content-length")
jbe@162 484 if content_length == nil then
jbe@162 485 content_length = cl
jbe@162 486 elseif content_length == cl then
jbe@162 487 return
jbe@162 488 else
jbe@162 489 error("Content-Length has been set multiple times with different values")
jbe@162 490 end
jbe@162 491 elseif key_lower == "connection" then
jbe@162 492 for entry in string.gmatch(string.lower(value), "[^,]+") do
jbe@162 493 if string.match(entry, "^[ \t]*close[ \t]*$") then
jbe@162 494 if state == "info_status_sent" then
jbe@162 495 error("Cannot set \"Connection: close\" for informational status response")
jbe@162 496 end
jbe@162 497 close_responded = true
jbe@162 498 break
jbe@162 499 end
jbe@162 500 end
jbe@162 501 end
jbe@162 502 assert_output(socket:write(key, ": ", value, "\r\n"))
jbe@162 503 end
jbe@162 504 -- function to terminate header section in response, optionally flushing:
jbe@162 505 -- (may be called multiple times unless response is finished)
jbe@162 506 local function finish_headers(with_flush)
jbe@162 507 if state == "finished" then
jbe@162 508 error("Response has already been finished")
jbe@162 509 elseif state == "info_status_sent" then
jbe@162 510 send_flush("\r\n")
jbe@162 511 state = "no_status_sent"
jbe@162 512 elseif state == "bodyless_status_sent" then
jbe@162 513 if close_requested and not close_responded then
jbe@162 514 request:send_header("Connection", "close")
jbe@162 515 end
jbe@162 516 send("\r\n")
jbe@163 517 finish()
jbe@162 518 state = "finished"
jbe@162 519 elseif state == "status_sent" then
jbe@162 520 if not content_length then
jbe@162 521 request:send_header("Transfer-Encoding", "chunked")
jbe@162 522 end
jbe@162 523 if close_requested and not close_responded then
jbe@162 524 request:send_header("Connection", "close")
jbe@162 525 end
jbe@162 526 send("\r\n")
jbe@162 527 if request.method == "HEAD" then
jbe@163 528 finish()
jbe@162 529 elseif with_flush then
jbe@162 530 send_flush()
jbe@162 531 end
jbe@162 532 state = "headers_sent"
jbe@162 533 elseif state ~= "headers_sent" then
jbe@162 534 error("HTTP status has not been sent yet")
jbe@162 535 end
jbe@162 536 end
jbe@162 537 -- method to finish and flush headers:
jbe@162 538 function request:finish_headers()
jbe@164 539 assert_not_faulty()
jbe@162 540 finish_headers(true)
jbe@162 541 end
jbe@164 542 -- method to send body data:
jbe@164 543 function request:send_data(...)
jbe@164 544 assert_not_faulty()
jbe@164 545 if output_state == "info_status_sent" then
jbe@164 546 error("No (non-informational) HTTP status has been sent yet")
jbe@164 547 elseif output_state == "bodyless_status_sent" then
jbe@164 548 error("Cannot send response data for body-less status message")
jbe@164 549 end
jbe@164 550 finish_headers(false)
jbe@164 551 if output_state ~= "headers_sent" then
jbe@164 552 error("Unexpected internal status in HTTP engine")
jbe@164 553 end
jbe@164 554 if request.method == "HEAD" then
jbe@164 555 return
jbe@164 556 end
jbe@164 557 for i = 1, select("#", ...) do
jbe@164 558 local str = tostring(select(i, ...))
jbe@164 559 if #str > 0 then
jbe@164 560 if content_length then
jbe@164 561 local bytes_to_send = #str
jbe@164 562 if bytes_sent + bytes_to_send > content_length then
jbe@164 563 error("Content length exceeded")
jbe@164 564 else
jbe@164 565 send(str)
jbe@164 566 bytes_sent = bytes_sent + bytes_to_send
jbe@164 567 end
jbe@164 568 else
jbe@164 569 chunk_bytes = chunk_bytes + #str
jbe@164 570 chunk_parts[#chunk_parts+1] = str
jbe@164 571 end
jbe@164 572 end
jbe@164 573 end
jbe@164 574 if chunk_bytes >= output_chunk_size then
jbe@164 575 send_chunk()
jbe@164 576 end
jbe@164 577 end
jbe@165 578 -- method to flush output buffer:
jbe@165 579 function request:flush()
jbe@165 580 assert_not_faulty()
jbe@165 581 send_chunk()
jbe@165 582 send_flush()
jbe@165 583 end
jbe@165 584 -- method to finish response:
jbe@165 585 function request:finish()
jbe@165 586 assert_not_faulty()
jbe@165 587 if state == "finished" then
jbe@165 588 return
jbe@165 589 elseif state == "info_status_sent" then
jbe@165 590 error("Informational HTTP response can be finished with :finish_headers() method")
jbe@165 591 end
jbe@165 592 finish_headers(false)
jbe@165 593 if state == "headers_sent" then
jbe@165 594 if request.method ~= "HEAD" then
jbe@165 595 state = "faulty"
jbe@165 596 if content_length then
jbe@165 597 if bytes_sent ~= content_length then
jbe@165 598 error("Content length not used")
jbe@165 599 end
jbe@165 600 else
jbe@165 601 send_chunk()
jbe@165 602 send("0\r\n\r\n")
jbe@165 603 end
jbe@165 604 finish()
jbe@165 605 end
jbe@165 606 state = "finished"
jbe@165 607 elseif state ~= "finished" then
jbe@165 608 error("Unexpected internal status in HTTP engine")
jbe@165 609 end
jbe@165 610 end
jbe@163 611 -- function to report an error:
jbe@163 612 local function request_error(throw_error, status, text)
jbe@163 613 local errmsg = "Error while reading request from client. Error response: " .. status
jbe@163 614 if text then
jbe@163 615 errmsg = errmsg .. " (" .. text .. ")"
jbe@163 616 end
jbe@163 617 if
jbe@163 618 state == "init" or
jbe@163 619 state == "prepare" or
jbe@163 620 state == "no_status_sent" or
jbe@163 621 state == "info_status_sent"
jbe@163 622 then
jbe@163 623 local error_response_status, errmsg2 = pcall(function()
jbe@163 624 request:monologue()
jbe@163 625 request:send_status(status)
jbe@163 626 request:send_header("Content-Type", "text/plain")
jbe@163 627 request:send_data(status, "\n")
jbe@163 628 if text then
jbe@163 629 request:send_data("\n", text, "\n")
jbe@163 630 end
jbe@163 631 request:finish()
jbe@163 632 end)
jbe@163 633 if not error_response_status then
jbe@163 634 error("Unexpected error while sending error response: " .. errmsg2)
jbe@163 635 end
jbe@163 636 elseif state ~= "faulty" then
jbe@163 637 assert_close(socket:reset())
jbe@163 638 end
jbe@163 639 if throw_error then
jbe@163 640 error(errmsg)
jbe@163 641 else
jbe@163 642 return survive
jbe@163 643 end
jbe@163 644 end
jbe@160 645 -- wait for input:
jbe@160 646 if not poll(socket_set, nil, request_idle_timeout) then
jbe@163 647 return request_error(false, "408 Request Timeout", "Idle connection timed out")
jbe@38 648 end
jbe@162 649 until close_responded
jbe@0 650 return survive
jbe@0 651 end
jbe@0 652 end
jbe@0 653
jbe@0 654 return _M
jbe@0 655

Impressum / About Us