moonbridge

annotate moonbridge_http.lua @ 165:00f01d945e13

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Work on new HTTP module implementation
author jbe
date Sat Jun 13 18:02:57 2015 +0200 (2015-06-13)
parents 27dc025e76cc
children 41a44ae5c293
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@154 86 -- parses URL encoded form data:
jbe@154 87 local function read_urlencoded_form(data)
jbe@154 88 local tbl = {}
jbe@154 89 for rawkey, rawvalue in string.gmatch(data, "([^?=&]*)=([^?=&]*)") do
jbe@154 90 local key = decode_uri(rawkey)
jbe@154 91 local value = decode_uri(rawvalue)
jbe@154 92 local subtbl = tbl[key]
jbe@154 93 if subtbl then
jbe@154 94 subtbl[#subtbl+1] = value
jbe@154 95 else
jbe@154 96 tbl[key] = {value}
jbe@35 97 end
jbe@35 98 end
jbe@154 99 return tbl
jbe@0 100 end
jbe@0 101
jbe@154 102 -- extracts first value from each subtable:
jbe@154 103 local function get_first_values(tbl)
jbe@154 104 local newtbl = {}
jbe@154 105 for key, subtbl in pairs(tbl) do
jbe@154 106 newtbl[key] = subtbl[1]
jbe@0 107 end
jbe@154 108 return newtbl
jbe@154 109 end
jbe@154 110
jbe@0 111 function generate_handler(handler, options)
jbe@0 112 -- swap arguments if necessary (for convenience):
jbe@0 113 if type(handler) ~= "function" and type(options) == "function" then
jbe@0 114 handler, options = options, handler
jbe@0 115 end
jbe@160 116 -- helper function to process options:
jbe@160 117 local function default(name, default_value)
jbe@160 118 local value = options[name]
jbe@160 119 if value == nil then
jbe@160 120 return default_value
jbe@160 121 else
jbe@160 122 return value or nil
jbe@159 123 end
jbe@160 124 end
jbe@0 125 -- process options:
jbe@0 126 options = options or {}
jbe@0 127 local preamble = "" -- preamble sent with every(!) HTTP response
jbe@0 128 do
jbe@0 129 -- named arg "static_headers" is used to create the preamble:
jbe@0 130 local s = options.static_headers
jbe@0 131 local t = {}
jbe@0 132 if s then
jbe@0 133 if type(s) == "string" then
jbe@0 134 for line in string.gmatch(s, "[^\r\n]+") do
jbe@0 135 t[#t+1] = line
jbe@0 136 end
jbe@0 137 else
jbe@0 138 for i, kv in ipairs(options.static_headers) do
jbe@0 139 if type(kv) == "string" then
jbe@0 140 t[#t+1] = kv
jbe@0 141 else
jbe@0 142 t[#t+1] = kv[1] .. ": " .. kv[2]
jbe@0 143 end
jbe@0 144 end
jbe@0 145 end
jbe@0 146 end
jbe@0 147 t[#t+1] = ""
jbe@0 148 preamble = table.concat(t, "\r\n")
jbe@0 149 end
jbe@160 150 local input_chunk_size = options.maximum_input_chunk_size or options.chunk_size or 16384
jbe@44 151 local output_chunk_size = options.minimum_output_chunk_size or options.chunk_size or 1024
jbe@160 152 local header_size_limit = options.header_size_limit or 1024*1024
jbe@160 153 local body_size_limit = options.body_size_limit or 64*1024*1024
jbe@160 154 local request_idle_timeout = default("request_idle_timeout", 330)
jbe@160 155 local request_header_timeout = default("request_header_timeout", 30)
jbe@160 156 local request_body_timeout = default("request_body_timeout", 60)
jbe@160 157 local request_response_timeout = default("request_response_timeout", 1800)
jbe@160 158 local poll = options.poll_function or moonbridge_io.poll
jbe@160 159 -- return socket handler:
jbe@0 160 return function(socket)
jbe@160 161 local socket_set = {[socket] = true} -- used for poll function
jbe@0 162 local survive = true -- set to false if process shall be terminated later
jbe@160 163 local consume -- function that reads some input if possible
jbe@160 164 -- function that drains some input if possible:
jbe@160 165 local function drain()
jbe@163 166 local bytes, status = socket:drain_nb(input_chunk_size)
jbe@163 167 if not bytes or status == "eof" then
jbe@160 168 consume = nil
jbe@50 169 end
jbe@159 170 end
jbe@163 171 -- function trying to unblock socket by reading:
jbe@160 172 local function unblock()
jbe@160 173 if consume then
jbe@160 174 poll(socket_set, socket_set)
jbe@160 175 consume()
jbe@160 176 else
jbe@160 177 poll(nil, socket_set)
jbe@0 178 end
jbe@154 179 end
jbe@163 180 -- function that enforces consumption of all input:
jbe@162 181 local function consume_all()
jbe@162 182 while consume do
jbe@163 183 poll(socket_set, nil)
jbe@162 184 consume()
jbe@162 185 end
jbe@162 186 end
jbe@163 187 -- handle requests in a loop:
jbe@160 188 repeat
jbe@162 189 -- create a new request object:
jbe@160 190 local request = {
jbe@165 191 -- allow access to underlying socket:
jbe@0 192 socket = socket,
jbe@165 193 -- cookies are simply stored in a table:
jbe@165 194 cookies = {},
jbe@165 195 -- table mapping header field names to value-lists
jbe@165 196 -- (raw access, but case-insensitive):
jbe@165 197 headers = setmetatable({}, {
jbe@165 198 __index = function(self, key)
jbe@165 199 local lowerkey = string.lower(key)
jbe@165 200 if lowerkey == key then
jbe@165 201 return
jbe@165 202 end
jbe@165 203 local result = rawget(self, lowerkey)
jbe@165 204 if result == nil then
jbe@165 205 result = {}
jbe@165 206 end
jbe@165 207 self[lowerkey] = result
jbe@165 208 self[key] = result
jbe@165 209 return result
jbe@165 210 end
jbe@165 211 }),
jbe@165 212 -- table mapping header field names to value-lists
jbe@165 213 -- (for headers with comma separated values):
jbe@165 214 headers_csv_table = setmetatable({}, {
jbe@165 215 __index = function(self, key)
jbe@165 216 local result = {}
jbe@165 217 for i, line in ipairs(request.headers[key]) do
jbe@165 218 for entry in string.gmatch(line, "[^,]+") do
jbe@165 219 local value = string.match(entry, "^[ \t]*(..-)[ \t]*$")
jbe@165 220 if value then
jbe@165 221 result[#result+1] = value
jbe@165 222 end
jbe@165 223 end
jbe@165 224 end
jbe@165 225 self[key] = result
jbe@165 226 return result
jbe@165 227 end
jbe@165 228 }),
jbe@165 229 -- table mapping header field names to a comma separated string
jbe@165 230 -- (for headers with comma separated values):
jbe@165 231 headers_csv_string = setmetatable({}, {
jbe@165 232 __index = function(self, key)
jbe@165 233 local result = {}
jbe@165 234 for i, line in ipairs(request.headers[key]) do
jbe@165 235 result[#result+1] = line
jbe@165 236 end
jbe@165 237 result = string.concat(result, ", ")
jbe@165 238 self[key] = result
jbe@165 239 return result
jbe@165 240 end
jbe@165 241 }),
jbe@165 242 -- table mapping header field names to a single string value
jbe@165 243 -- (or false if header has been sent multiple times):
jbe@165 244 headers_value = setmetatable({}, {
jbe@165 245 __index = function(self, key)
jbe@165 246 if headers_value_nil[key] then
jbe@165 247 return nil
jbe@165 248 end
jbe@165 249 local result = nil
jbe@165 250 local values = request.headers_csv_table[key]
jbe@165 251 if #values == 0 then
jbe@165 252 headers_value_nil[key] = true
jbe@165 253 elseif #values == 1 then
jbe@165 254 result = values[1]
jbe@165 255 else
jbe@165 256 result = false
jbe@165 257 end
jbe@165 258 self[key] = result
jbe@165 259 return result
jbe@165 260 end
jbe@165 261 }),
jbe@165 262 -- table mapping header field names to a flag table,
jbe@165 263 -- indicating if the comma separated value contains certain entries:
jbe@165 264 headers_flags = setmetatable({}, {
jbe@165 265 __index = function(self, key)
jbe@165 266 local result = setmetatable({}, {
jbe@165 267 __index = function(self, key)
jbe@165 268 local lowerkey = string.lower(key)
jbe@165 269 local result = rawget(self, lowerkey) or false
jbe@165 270 self[lowerkey] = result
jbe@165 271 self[key] = result
jbe@165 272 return result
jbe@165 273 end
jbe@165 274 })
jbe@165 275 for i, value in ipairs(request.headers_csv_table[key]) do
jbe@165 276 result[string.lower(value)] = true
jbe@165 277 end
jbe@165 278 self[key] = result
jbe@165 279 return result
jbe@165 280 end
jbe@165 281 })
jbe@0 282 }
jbe@162 283 -- local variables to track the state:
jbe@162 284 local state = "init" -- one of:
jbe@162 285 -- "init" (initial state)
jbe@163 286 -- "prepare" (configureation in preparation)
jbe@162 287 -- "no_status_sent" (configuration complete)
jbe@162 288 -- "info_status_sent" (1xx status code has been sent)
jbe@162 289 -- "bodyless_status_sent" (204/304 status code has been sent)
jbe@162 290 -- "status_sent" (regular status code has been sent)
jbe@162 291 -- "headers_sent" (headers have been terminated)
jbe@162 292 -- "finished" (request has been answered completely)
jbe@163 293 -- "faulty" (I/O or protocaol error)
jbe@162 294 local close_requested = false -- "Connection: close" requested
jbe@162 295 local close_responded = false -- "Connection: close" sent
jbe@162 296 local content_length = nil -- value of Content-Length header sent
jbe@164 297 local chunk_parts = {} -- list of chunks to send
jbe@164 298 local chunk_bytes = 0 -- sum of lengths of chunks to send
jbe@163 299 -- functions to assert proper output/closing:
jbe@163 300 local function assert_output(...)
jbe@163 301 local retval, errmsg = ...
jbe@163 302 if retval then return ... end
jbe@163 303 state = "faulty"
jbe@163 304 socket:reset()
jbe@163 305 error("Could not send data to client: " .. errmsg)
jbe@163 306 end
jbe@163 307 local function assert_close(...)
jbe@163 308 local retval, errmsg = ...
jbe@163 309 if retval then return ... end
jbe@163 310 state = "faulty"
jbe@163 311 error("Could not finish sending data to client: " .. errmsg)
jbe@163 312 end
jbe@164 313 -- function to assert non-faulty handle:
jbe@164 314 local function assert_not_faulty()
jbe@164 315 assert(state ~= "faulty", "Tried to use faulty request handle")
jbe@164 316 end
jbe@162 317 -- functions to send data to the browser:
jbe@160 318 local function send(...)
jbe@163 319 assert_output(socket:write_call(unblock, ...))
jbe@38 320 end
jbe@162 321 local function send_flush(...)
jbe@163 322 assert_output(socket:flush_call(unblock, ...))
jbe@162 323 end
jbe@163 324 -- function to finish request:
jbe@163 325 local function finish()
jbe@163 326 if close_responded then
jbe@163 327 -- discard any input:
jbe@163 328 consume = drain
jbe@163 329 -- close output stream:
jbe@163 330 send_flush()
jbe@163 331 assert_close(socket:finish())
jbe@163 332 -- wait for EOF of peer to avoid immediate TCP RST condition:
jbe@163 333 consume_all()
jbe@163 334 -- fully close socket:
jbe@163 335 assert_close(socket:close())
jbe@163 336 else
jbe@163 337 send_flush()
jbe@163 338 consume_all()
jbe@163 339 end
jbe@163 340 end
jbe@164 341 -- function that writes out buffered chunks (without flushing the socket):
jbe@164 342 function send_chunk()
jbe@164 343 if chunk_bytes > 0 then
jbe@164 344 assert_output(socket:write(string.format("%x\r\n", chunk_bytes)))
jbe@164 345 for i = 1, #chunk_parts do -- TODO: evaluated only once?
jbe@164 346 send(chunk_parts[i])
jbe@164 347 chunk_parts[i] = nil
jbe@164 348 end
jbe@164 349 chunk_bytes = 0
jbe@164 350 send("\r\n")
jbe@164 351 end
jbe@164 352 end
jbe@164 353 -- function to prepare (or skip) body processing:
jbe@162 354 local function prepare()
jbe@164 355 assert_not_faulty()
jbe@162 356 if state == "prepare" then
jbe@164 357 error("Unexpected internal status in HTTP engine (recursive prepare)")
jbe@162 358 elseif state ~= "init" then
jbe@162 359 return
jbe@162 360 end
jbe@162 361 state = "prepare"
jbe@162 362 -- TODO
jbe@162 363 state = "no_status_sent"
jbe@162 364 end
jbe@163 365 -- method to ignore input and close connection after response:
jbe@163 366 function request:monologue()
jbe@164 367 assert_not_faulty()
jbe@163 368 if
jbe@163 369 state == "headers_sent" or
jbe@163 370 state == "finished"
jbe@163 371 then
jbe@163 372 error("All HTTP headers have already been sent")
jbe@163 373 end
jbe@164 374 local old_state = state
jbe@164 375 state = "faulty"
jbe@163 376 consume = drain
jbe@163 377 close_requested = true
jbe@164 378 if old_state == "init" or old_state == "prepare" then -- TODO: ok?
jbe@163 379 state = "no_status_sent"
jbe@164 380 else
jbe@164 381 state = old_state
jbe@162 382 end
jbe@162 383 end
jbe@163 384 --
jbe@162 385 -- method to send a HTTP response status (e.g. "200 OK"):
jbe@162 386 function request:send_status(status)
jbe@162 387 prepare()
jbe@164 388 local old_state = state
jbe@164 389 state = "faulty"
jbe@164 390 if old_state == "info_status_sent" then
jbe@162 391 send_flush("\r\n")
jbe@164 392 elseif old_state ~= "no_status_sent" then
jbe@162 393 error("HTTP status has already been sent")
jbe@162 394 end
jbe@162 395 local status1 = string.sub(status, 1, 1)
jbe@162 396 local status3 = string.sub(status, 1, 3)
jbe@162 397 send("HTTP/1.1 ", status, "\r\n", preamble)
jbe@162 398 local wrb = status_without_response_body[status3]
jbe@162 399 if wrb then
jbe@162 400 state = "bodyless_status_sent"
jbe@162 401 if wrb == "zero_content_length" then
jbe@162 402 request:send_header("Content-Length", 0)
jbe@162 403 end
jbe@162 404 elseif status1 == "1" then
jbe@162 405 state = "info_status_sent"
jbe@162 406 else
jbe@162 407 state = "status_sent"
jbe@162 408 end
jbe@162 409 end
jbe@162 410 -- method to send a HTTP response header:
jbe@162 411 -- (key and value must be provided as separate args)
jbe@162 412 function request:send_header(key, value)
jbe@164 413 assert_not_faulty()
jbe@164 414 if
jbe@164 415 state == "init" or
jbe@164 416 state == "prepare" or
jbe@164 417 state == "no_status_sent"
jbe@164 418 then
jbe@162 419 error("HTTP status has not been sent yet")
jbe@162 420 elseif
jbe@164 421 state == "headers_sent" or
jbe@164 422 state == "finished"
jbe@162 423 then
jbe@162 424 error("All HTTP headers have already been sent")
jbe@162 425 end
jbe@162 426 local key_lower = string.lower(key)
jbe@162 427 if key_lower == "content-length" then
jbe@162 428 if state == "info_status_sent" then
jbe@162 429 error("Cannot set Content-Length for informational status response")
jbe@162 430 end
jbe@162 431 local cl = assert(tonumber(value), "Invalid content-length")
jbe@162 432 if content_length == nil then
jbe@162 433 content_length = cl
jbe@162 434 elseif content_length == cl then
jbe@162 435 return
jbe@162 436 else
jbe@162 437 error("Content-Length has been set multiple times with different values")
jbe@162 438 end
jbe@162 439 elseif key_lower == "connection" then
jbe@162 440 for entry in string.gmatch(string.lower(value), "[^,]+") do
jbe@162 441 if string.match(entry, "^[ \t]*close[ \t]*$") then
jbe@162 442 if state == "info_status_sent" then
jbe@162 443 error("Cannot set \"Connection: close\" for informational status response")
jbe@162 444 end
jbe@162 445 close_responded = true
jbe@162 446 break
jbe@162 447 end
jbe@162 448 end
jbe@162 449 end
jbe@162 450 assert_output(socket:write(key, ": ", value, "\r\n"))
jbe@162 451 end
jbe@162 452 -- function to terminate header section in response, optionally flushing:
jbe@162 453 -- (may be called multiple times unless response is finished)
jbe@162 454 local function finish_headers(with_flush)
jbe@162 455 if state == "finished" then
jbe@162 456 error("Response has already been finished")
jbe@162 457 elseif state == "info_status_sent" then
jbe@162 458 send_flush("\r\n")
jbe@162 459 state = "no_status_sent"
jbe@162 460 elseif state == "bodyless_status_sent" then
jbe@162 461 if close_requested and not close_responded then
jbe@162 462 request:send_header("Connection", "close")
jbe@162 463 end
jbe@162 464 send("\r\n")
jbe@163 465 finish()
jbe@162 466 state = "finished"
jbe@162 467 elseif state == "status_sent" then
jbe@162 468 if not content_length then
jbe@162 469 request:send_header("Transfer-Encoding", "chunked")
jbe@162 470 end
jbe@162 471 if close_requested and not close_responded then
jbe@162 472 request:send_header("Connection", "close")
jbe@162 473 end
jbe@162 474 send("\r\n")
jbe@162 475 if request.method == "HEAD" then
jbe@163 476 finish()
jbe@162 477 elseif with_flush then
jbe@162 478 send_flush()
jbe@162 479 end
jbe@162 480 state = "headers_sent"
jbe@162 481 elseif state ~= "headers_sent" then
jbe@162 482 error("HTTP status has not been sent yet")
jbe@162 483 end
jbe@162 484 end
jbe@162 485 -- method to finish and flush headers:
jbe@162 486 function request:finish_headers()
jbe@164 487 assert_not_faulty()
jbe@162 488 finish_headers(true)
jbe@162 489 end
jbe@164 490 -- method to send body data:
jbe@164 491 function request:send_data(...)
jbe@164 492 assert_not_faulty()
jbe@164 493 if output_state == "info_status_sent" then
jbe@164 494 error("No (non-informational) HTTP status has been sent yet")
jbe@164 495 elseif output_state == "bodyless_status_sent" then
jbe@164 496 error("Cannot send response data for body-less status message")
jbe@164 497 end
jbe@164 498 finish_headers(false)
jbe@164 499 if output_state ~= "headers_sent" then
jbe@164 500 error("Unexpected internal status in HTTP engine")
jbe@164 501 end
jbe@164 502 if request.method == "HEAD" then
jbe@164 503 return
jbe@164 504 end
jbe@164 505 for i = 1, select("#", ...) do
jbe@164 506 local str = tostring(select(i, ...))
jbe@164 507 if #str > 0 then
jbe@164 508 if content_length then
jbe@164 509 local bytes_to_send = #str
jbe@164 510 if bytes_sent + bytes_to_send > content_length then
jbe@164 511 error("Content length exceeded")
jbe@164 512 else
jbe@164 513 send(str)
jbe@164 514 bytes_sent = bytes_sent + bytes_to_send
jbe@164 515 end
jbe@164 516 else
jbe@164 517 chunk_bytes = chunk_bytes + #str
jbe@164 518 chunk_parts[#chunk_parts+1] = str
jbe@164 519 end
jbe@164 520 end
jbe@164 521 end
jbe@164 522 if chunk_bytes >= output_chunk_size then
jbe@164 523 send_chunk()
jbe@164 524 end
jbe@164 525 end
jbe@165 526 -- method to flush output buffer:
jbe@165 527 function request:flush()
jbe@165 528 assert_not_faulty()
jbe@165 529 send_chunk()
jbe@165 530 send_flush()
jbe@165 531 end
jbe@165 532 -- method to finish response:
jbe@165 533 function request:finish()
jbe@165 534 assert_not_faulty()
jbe@165 535 if state == "finished" then
jbe@165 536 return
jbe@165 537 elseif state == "info_status_sent" then
jbe@165 538 error("Informational HTTP response can be finished with :finish_headers() method")
jbe@165 539 end
jbe@165 540 finish_headers(false)
jbe@165 541 if state == "headers_sent" then
jbe@165 542 if request.method ~= "HEAD" then
jbe@165 543 state = "faulty"
jbe@165 544 if content_length then
jbe@165 545 if bytes_sent ~= content_length then
jbe@165 546 error("Content length not used")
jbe@165 547 end
jbe@165 548 else
jbe@165 549 send_chunk()
jbe@165 550 send("0\r\n\r\n")
jbe@165 551 end
jbe@165 552 finish()
jbe@165 553 end
jbe@165 554 state = "finished"
jbe@165 555 elseif state ~= "finished" then
jbe@165 556 error("Unexpected internal status in HTTP engine")
jbe@165 557 end
jbe@165 558 end
jbe@163 559 -- function to report an error:
jbe@163 560 local function request_error(throw_error, status, text)
jbe@163 561 local errmsg = "Error while reading request from client. Error response: " .. status
jbe@163 562 if text then
jbe@163 563 errmsg = errmsg .. " (" .. text .. ")"
jbe@163 564 end
jbe@163 565 if
jbe@163 566 state == "init" or
jbe@163 567 state == "prepare" or
jbe@163 568 state == "no_status_sent" or
jbe@163 569 state == "info_status_sent"
jbe@163 570 then
jbe@163 571 local error_response_status, errmsg2 = pcall(function()
jbe@163 572 request:monologue()
jbe@163 573 request:send_status(status)
jbe@163 574 request:send_header("Content-Type", "text/plain")
jbe@163 575 request:send_data(status, "\n")
jbe@163 576 if text then
jbe@163 577 request:send_data("\n", text, "\n")
jbe@163 578 end
jbe@163 579 request:finish()
jbe@163 580 end)
jbe@163 581 if not error_response_status then
jbe@163 582 error("Unexpected error while sending error response: " .. errmsg2)
jbe@163 583 end
jbe@163 584 elseif state ~= "faulty" then
jbe@163 585 assert_close(socket:reset())
jbe@163 586 end
jbe@163 587 if throw_error then
jbe@163 588 error(errmsg)
jbe@163 589 else
jbe@163 590 return survive
jbe@163 591 end
jbe@163 592 end
jbe@160 593 -- wait for input:
jbe@160 594 if not poll(socket_set, nil, request_idle_timeout) then
jbe@163 595 return request_error(false, "408 Request Timeout", "Idle connection timed out")
jbe@38 596 end
jbe@162 597 until close_responded
jbe@0 598 return survive
jbe@0 599 end
jbe@0 600 end
jbe@0 601
jbe@0 602 return _M
jbe@0 603

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