moonbridge

annotate moonbridge_http.lua @ 157:99a70d18e47c

Further work on new HTTP layer (code cleanup, work on body reading)
author jbe
date Wed May 27 01:51:04 2015 +0200 (2015-05-27)
parents 0c4221702ce1
children bd7225b30391
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@154 111 request_pt = {}
jbe@154 112 request_mt = { __index = request_pt }
jbe@154 113
jbe@154 114 function request_pt:_init(handler, options)
jbe@155 115 self._application_handler = handler
jbe@0 116 -- process options:
jbe@0 117 options = options or {}
jbe@0 118 do
jbe@0 119 -- named arg "static_headers" is used to create the preamble:
jbe@0 120 local s = options.static_headers
jbe@0 121 local t = {}
jbe@0 122 if s then
jbe@0 123 if type(s) == "string" then
jbe@0 124 for line in string.gmatch(s, "[^\r\n]+") do
jbe@0 125 t[#t+1] = line
jbe@0 126 end
jbe@0 127 else
jbe@0 128 for i, kv in ipairs(options.static_headers) do
jbe@0 129 if type(kv) == "string" then
jbe@0 130 t[#t+1] = kv
jbe@0 131 else
jbe@0 132 t[#t+1] = kv[1] .. ": " .. kv[2]
jbe@0 133 end
jbe@0 134 end
jbe@0 135 end
jbe@0 136 end
jbe@0 137 t[#t+1] = ""
jbe@154 138 self._preamble = table.concat(t, "\r\n") -- preamble sent with every(!) HTTP response
jbe@115 139 end
jbe@154 140 self._input_chunk_size = options.maximum_input_chunk_size or options.chunk_size or 16384
jbe@154 141 self._output_chunk_size = options.minimum_output_chunk_size or options.chunk_size or 1024
jbe@154 142 self._header_size_limit = options.header_size_limit or 1024*1024
jbe@156 143 self._body_size_limit = options.body_size_limit or 64*1024*1024
jbe@154 144 local function init_timeout(name, default)
jbe@154 145 local value = options[name]
jbe@154 146 if value == nil then
jbe@154 147 self["_"..name] = default
jbe@154 148 else
jbe@155 149 self["_"..name] = value
jbe@154 150 end
jbe@53 151 end
jbe@154 152 init_timeout("request_idle_timeout", 330)
jbe@154 153 init_timeout("request_header_timeout", 30)
jbe@154 154 init_timeout("request_body_timeout", 1800)
jbe@154 155 init_timeout("response_timeout", 1830)
jbe@154 156 self._poll = options.poll_function or moonbridge_io.poll
jbe@154 157 self:_create_closure("_write_yield")
jbe@154 158 self:_create_closure("_handler")
jbe@155 159 self:_create_header_metatables()
jbe@155 160 end
jbe@155 161
jbe@155 162 function request_pt:_create_closure(name)
jbe@155 163 self[name.."_closure"] = function(...)
jbe@155 164 return self[name](self, ...)
jbe@155 165 end
jbe@155 166 end
jbe@155 167
jbe@155 168 function request_pt:_create_header_metatables()
jbe@154 169 -- table mapping header field names to value-lists:
jbe@154 170 self._headers_mt = {
jbe@154 171 __index = function(tbl, key)
jbe@154 172 local lowerkey = string.lower(key)
jbe@154 173 local result = self._headers[lowerkey]
jbe@154 174 if result == nil then
jbe@154 175 result = {}
jbe@50 176 end
jbe@154 177 tbl[lowerkey] = result
jbe@154 178 tbl[key] = result
jbe@154 179 return result
jbe@154 180 end
jbe@154 181 }
jbe@154 182 -- table mapping header field names to value-lists
jbe@154 183 -- (for headers with comma separated values):
jbe@154 184 self._headers_csv_table_mt = {
jbe@154 185 __index = function(tbl, key)
jbe@154 186 local result = {}
jbe@154 187 for i, line in ipairs(self.headers[key]) do
jbe@154 188 for entry in string.gmatch(line, "[^,]+") do
jbe@154 189 local value = string.match(entry, "^[ \t]*(..-)[ \t]*$")
jbe@154 190 if value then
jbe@154 191 result[#result+1] = value
jbe@0 192 end
jbe@0 193 end
jbe@0 194 end
jbe@154 195 tbl[key] = result
jbe@154 196 return result
jbe@154 197 end
jbe@154 198 }
jbe@154 199 -- table mapping header field names to a comma separated string
jbe@154 200 -- (for headers with comma separated values):
jbe@154 201 self._headers_csv_string_mt = {
jbe@154 202 __index = function(tbl, key)
jbe@154 203 local result = {}
jbe@154 204 for i, line in ipairs(self.headers[key]) do
jbe@154 205 result[#result+1] = line
jbe@154 206 end
jbe@154 207 result = string.concat(result, ", ")
jbe@154 208 tbl[key] = result
jbe@154 209 return result
jbe@154 210 end
jbe@154 211 }
jbe@154 212 -- table mapping header field names to a single string value
jbe@154 213 -- (or false if header has been sent multiple times):
jbe@154 214 self._headers_value_mt = {
jbe@154 215 __index = function(tbl, key)
jbe@154 216 if self._headers_value_nil[key] then
jbe@154 217 return nil
jbe@154 218 end
jbe@154 219 local result = nil
jbe@154 220 local values = self.headers_csv_table[key]
jbe@154 221 if #values == 0 then
jbe@154 222 self._headers_value_nil[key] = true
jbe@154 223 elseif #values == 1 then
jbe@154 224 result = values[1]
jbe@154 225 else
jbe@154 226 result = false
jbe@154 227 end
jbe@154 228 tbl[key] = result
jbe@154 229 return result
jbe@154 230 end
jbe@154 231 }
jbe@154 232 -- table mapping header field names to a flag table,
jbe@154 233 -- indicating if the comma separated value contains certain entries:
jbe@154 234 self._headers_flags_mt = {
jbe@154 235 __index = function(tbl, key)
jbe@154 236 local result = setmetatable({}, {
jbe@154 237 __index = function(tbl, key)
jbe@154 238 local lowerkey = string.lower(key)
jbe@154 239 local result = rawget(tbl, lowerkey) or false
jbe@154 240 tbl[lowerkey] = result
jbe@154 241 tbl[key] = result
jbe@154 242 return result
jbe@0 243 end
jbe@154 244 })
jbe@154 245 for i, value in ipairs(self.headers_csv_table[key]) do
jbe@154 246 result[string.lower(value)] = true
jbe@0 247 end
jbe@154 248 tbl[key] = result
jbe@154 249 return result
jbe@154 250 end
jbe@154 251 }
jbe@154 252 end
jbe@154 253
jbe@154 254 function request_pt:_create_magictable(name)
jbe@154 255 self[name] = setmetatable({}, self["_"..name.."_mt"])
jbe@154 256 end
jbe@154 257
jbe@154 258 function request_pt:_handler(socket)
jbe@154 259 self._socket = socket
jbe@154 260 self._survive = true
jbe@154 261 self._socket_set = {[socket] = true}
jbe@154 262 self._faulty = false
jbe@155 263 self._connection_close_requested = false
jbe@155 264 self._connection_close_responded = false
jbe@154 265 self:_create_magictable("headers")
jbe@154 266 self:_create_magictable("headers_csv_table")
jbe@154 267 self:_create_magictable("headers_csv_string")
jbe@154 268 self:_create_magictable("headers_value")
jbe@154 269 self:_create_magictable("headers_flags")
jbe@154 270 repeat
jbe@154 271 -- wait for input:
jbe@154 272 if not moonbridge_io.poll(self._socket_set, nil, self._request_idle_timeout) then
jbe@154 273 self:_error("408 Request Timeout", "Idle connection timed out")
jbe@154 274 return self._survive
jbe@154 275 end
jbe@154 276 -- read headers (with timeout):
jbe@154 277 do
jbe@154 278 local coro = coroutine.wrap(self._read_headers)
jbe@154 279 local timeout = self._request_header_timeout
jbe@154 280 local starttime = timeout and moonbridge_io.timeref()
jbe@154 281 while true do
jbe@154 282 local status = coro(self)
jbe@154 283 if status == nil then
jbe@154 284 local remaining
jbe@154 285 if timeout then
jbe@154 286 remaining = timeout - moonbridge_io.timeref(starttime)
jbe@0 287 end
jbe@154 288 if not self._poll(self._socket_set, nil, remaining) then
jbe@154 289 self:_error("408 Request Timeout", "Timeout while receiving headers")
jbe@154 290 return self._survive
jbe@0 291 end
jbe@154 292 elseif status == false then
jbe@154 293 return self._survive
jbe@154 294 elseif status == true then
jbe@154 295 break
jbe@154 296 else
jbe@154 297 error("Unexpected yield value")
jbe@0 298 end
jbe@0 299 end
jbe@154 300 end
jbe@157 301 -- prepare reading of body:
jbe@157 302 self._read_body_coro = coroutine.wrap(self._read_body)
jbe@157 303 -- set timeout for application handler:
jbe@155 304 timeout(self._response_timeout or 0)
jbe@157 305 -- call application handler:
jbe@155 306 if self._application_handler(self) ~= true then
jbe@155 307 self._survive = false
jbe@155 308 end
jbe@157 309 -- enforce request:finish()
jbe@155 310 request:finish()
jbe@157 311 -- reset timeout of application handler
jbe@155 312 timeout(0)
jbe@155 313 until self._connection_close_responded
jbe@155 314 return self._survive
jbe@154 315 end
jbe@154 316
jbe@157 317 function request_pt:_drain_input()
jbe@157 318 self._read_body_coro = "drain"
jbe@157 319 end
jbe@157 320
jbe@157 321 function request_pt:_consume_some_input()
jbe@157 322 local coro = self._read_body_coro
jbe@157 323 if coro == "drain" then
jbe@157 324 local bytes, status = self._socket:drain_nb(self._input_chunk_size)
jbe@157 325 if status == "eof" then
jbe@157 326 coro = nil
jbe@157 327 end
jbe@157 328 elseif coro then
jbe@157 329 local retval = coro(self)
jbe@157 330 if retval ~= nil then
jbe@157 331 coro = nil -- can't consume more data
jbe@157 332 end
jbe@157 333 end
jbe@157 334 end
jbe@157 335
jbe@157 336 function request_pt:_consume_all_input()
jbe@157 337 while self._read_body_coro do
jbe@157 338 self._poll(socket_set)
jbe@157 339 self:_consume_some_input()
jbe@157 340 end
jbe@157 341 end
jbe@157 342
jbe@154 343 function request_pt:_error(status, explanation)
jbe@154 344 end
jbe@154 345
jbe@154 346 function request_pt:_read(...)
jbe@154 347 local line, status = self._socket:read_yield(...)
jbe@154 348 if line == nil then
jbe@154 349 self._faulty = true
jbe@154 350 error(status)
jbe@154 351 else
jbe@154 352 return line, status
jbe@154 353 end
jbe@154 354 end
jbe@154 355
jbe@154 356 function request_pt:_read_headers()
jbe@154 357 local remaining = self._header_size_limit
jbe@154 358 -- read and parse request line:
jbe@154 359 local target, proto
jbe@154 360 do
jbe@154 361 local line, status = self:_read(remaining-2, "\n")
jbe@154 362 if status == "maxlen" then
jbe@154 363 self:_error("414 Request-URI Too Long")
jbe@154 364 return false
jbe@154 365 elseif status == "eof" then
jbe@154 366 if line ~= "" then
jbe@154 367 self:_error("400 Bad Request", "Unexpected EOF in request-URI line")
jbe@115 368 end
jbe@154 369 return false
jbe@154 370 end
jbe@154 371 remaining = remaining - #line
jbe@154 372 self.method, target, proto =
jbe@154 373 line:match("^([^ \t\r]+)[ \t]+([^ \t\r]+)[ \t]*([^ \t\r]*)[ \t]*\r?\n$")
jbe@154 374 if not request.method then
jbe@154 375 self:_error("400 Bad Request", "Invalid request-URI line")
jbe@154 376 return false
jbe@154 377 elseif proto ~= "HTTP/1.1" then
jbe@154 378 self:_error("505 HTTP Version Not Supported")
jbe@154 379 return false
jbe@154 380 end
jbe@154 381 end
jbe@154 382 -- read and parse headers:
jbe@157 383 self._headers = {}
jbe@157 384 self._headers_value_nil = {}
jbe@154 385 while true do
jbe@154 386 local line, status = self:_read(remaining, "\n");
jbe@154 387 if status == "maxlen" then
jbe@154 388 self:_error("431 Request Header Fields Too Large")
jbe@154 389 return false
jbe@154 390 elseif status == "eof" then
jbe@154 391 self:_error("400 Bad Request", "Unexpected EOF in request headers")
jbe@154 392 return false
jbe@154 393 end
jbe@154 394 remaining = remaining - #line
jbe@154 395 if line == "\r\n" or line == "\n" then
jbe@154 396 break
jbe@154 397 end
jbe@154 398 local key, value = string.match(line, "^([^ \t\r]+):[ \t]*(.-)[ \t]*\r?\n$")
jbe@154 399 if not key then
jbe@154 400 self:_error("400 Bad Request", "Invalid header line")
jbe@154 401 return false
jbe@154 402 end
jbe@154 403 local lowerkey = key:lower()
jbe@154 404 local values = self._headers[lowerkey]
jbe@154 405 if values then
jbe@154 406 values[#values+1] = value
jbe@154 407 else
jbe@154 408 self._headers[lowerkey] = {value}
jbe@154 409 end
jbe@154 410 end
jbe@154 411 -- process "Connection: close" header if existent:
jbe@154 412 self._connection_close_requested = self.headers_flags["Connection"]["close"]
jbe@154 413 -- process "Content-Length" header if existent:
jbe@154 414 do
jbe@154 415 local values = self.headers_csv_table["Content-Length"]
jbe@154 416 if #values > 0 then
jbe@154 417 self._request_body_content_length = tonumber(values[1])
jbe@154 418 local proper_value = tostring(request_body_content_length)
jbe@154 419 for i, value in ipairs(values) do
jbe@154 420 value = string.match(value, "^0*(.*)")
jbe@154 421 if value ~= proper_value then
jbe@154 422 self:_error("400 Bad Request", "Content-Length header(s) invalid")
jbe@154 423 return false
jbe@0 424 end
jbe@38 425 end
jbe@154 426 if request_body_content_length > self._body_size_limit then
jbe@154 427 self:_error("413 Request Entity Too Large", "Announced request body size is too big")
jbe@154 428 return false
jbe@38 429 end
jbe@154 430 end
jbe@154 431 end
jbe@154 432 -- process "Transfer-Encoding" header if existent:
jbe@154 433 do
jbe@154 434 local flag = self.headers_flags["Transfer-Encoding"]["chunked"]
jbe@154 435 local list = self.headers_csv_table["Transfer-Encoding"]
jbe@154 436 if (flag and #list ~= 1) or (not flag and #list ~= 0) then
jbe@154 437 self:_error("400 Bad Request", "Unexpected Transfer-Encoding")
jbe@154 438 return false
jbe@154 439 end
jbe@154 440 end
jbe@154 441 -- process "Expect" header if existent:
jbe@154 442 for i, value in ipairs(self.headers_csv_table["Expect"]) do
jbe@154 443 if string.lower(value) ~= "100-continue" then
jbe@154 444 self:_error("417 Expectation Failed", "Unexpected Expect header")
jbe@154 445 return false
jbe@154 446 end
jbe@154 447 end
jbe@154 448 -- get mandatory Host header according to RFC 7230:
jbe@154 449 self.host = self.headers_value["Host"]
jbe@154 450 if not self.host then
jbe@154 451 self:_error("400 Bad Request", "No valid host header")
jbe@154 452 return false
jbe@154 453 end
jbe@154 454 -- parse request target:
jbe@154 455 self.path, self.query = string.match(target, "^/([^?]*)(.*)$")
jbe@154 456 if not self.path then
jbe@154 457 local host2
jbe@154 458 host2, self.path, self.query = string.match(target, "^[Hh][Tt][Tt][Pp]://([^/?]+)/?([^?]*)(.*)$")
jbe@154 459 if host2 then
jbe@154 460 if self.host ~= host2 then
jbe@154 461 self:_error("400 Bad Request", "No valid host header")
jbe@154 462 return false
jbe@38 463 end
jbe@154 464 elseif not (target == "*" and self.method == "OPTIONS") then
jbe@154 465 self:_error("400 Bad Request", "Invalid request target")
jbe@157 466 return false
jbe@154 467 end
jbe@154 468 end
jbe@154 469 -- parse GET params:
jbe@154 470 if self.query then
jbe@154 471 self.get_params_list = read_urlencoded_form(request.query)
jbe@154 472 self.get_params = get_first_values(self.get_params_list)
jbe@154 473 end
jbe@154 474 -- parse cookies:
jbe@157 475 self.cookies = {}
jbe@154 476 for i, line in ipairs(self.headers["Cookie"]) do
jbe@154 477 for rawkey, rawvalue in
jbe@154 478 string.gmatch(line, "([^=; ]*)=([^=; ]*)")
jbe@154 479 do
jbe@154 480 self.cookies[decode_uri(rawkey)] = decode_uri(rawvalue)
jbe@154 481 end
jbe@0 482 end
jbe@157 483 -- indicate success:
jbe@157 484 return true
jbe@0 485 end
jbe@0 486
jbe@156 487 function request_pt:_read_body()
jbe@156 488 local remaining = self._body_size_limit
jbe@156 489 if request.headers_flags["Transfer-Encoding"]["chunked"] then
jbe@156 490 while true do
jbe@156 491 local line, status = self:_read(32 + remaining, "\n")
jbe@156 492 if status == "maxlen" then
jbe@156 493 self:_error("400 Bad Request", "Request body size limit exceeded")
jbe@156 494 return false
jbe@156 495 elseif status == "eof" then
jbe@156 496 self:_error("400 Bad Request", "Encoding error or unexpected EOF while reading next chunk of request body")
jbe@156 497 return false
jbe@156 498 end
jbe@156 499 local zeros, lenstr = string.match(line, "^(0*)([1-9A-Fa-f]+[0-9A-Fa-f]*)\r?\n$")
jbe@156 500 local chunkext
jbe@156 501 if lenstr then
jbe@156 502 chunkext = ""
jbe@156 503 else
jbe@156 504 zeros, lenstr, chunkext = string.match(line, "^(0*)([1-9A-Fa-f]+[0-9A-Fa-f]*)([ \t;].-)\r?\n$")
jbe@156 505 end
jbe@156 506 if not lenstr or #lenstr > 13 then
jbe@156 507 self:_error("400 Bad Request", "Encoding error while reading chunk of request body")
jbe@156 508 return false
jbe@156 509 end
jbe@156 510 local len = tonumber("0x" .. lenstr)
jbe@156 511 remaining = remaining - (#zeros + #chunkext + len)
jbe@156 512 if remaining < 0 then
jbe@156 513 self:_error("400 Bad Request", "Request body size limit exceeded")
jbe@156 514 return false
jbe@156 515 end
jbe@156 516 if len == 0 then break end
jbe@156 517 if self:_read_body_bytes(len) == false then
jbe@156 518 return false
jbe@156 519 end
jbe@156 520 local term, status = self:_read(2, "\n")
jbe@156 521 if status == "eof" then
jbe@156 522 self:_error("400 Bad Request", "Unexpected EOF while reading next chunk of request body")
jbe@156 523 return false
jbe@156 524 end
jbe@156 525 if term ~= "\r\n" and term ~= "\n" then
jbe@156 526 self:_error("400 Bad Request", "Encoding error while reading chunk of request body")
jbe@156 527 return false
jbe@156 528 end
jbe@156 529 end
jbe@156 530 while true do
jbe@156 531 local line, status = self:_read(2 + remaining, "\n")
jbe@156 532 if status == "eof" then
jbe@156 533 self:_error("400 Bad Request", "Unexpected EOF while reading chunk of request body")
jbe@156 534 return false
jbe@156 535 end
jbe@156 536 if line == "\r\n" or line == "\n" then break end
jbe@156 537 remaining = remaining - #line
jbe@156 538 if remaining < 0 then
jbe@157 539 self:_error("413 Request Entity Too Large", "Request body size limit exceeded while reading trailer section of chunked request body")
jbe@157 540 return false
jbe@156 541 end
jbe@156 542 end
jbe@156 543 elseif request_body_content_length then
jbe@156 544 if self._read_body_bytes(request_body_content_length) == false then
jbe@156 545 return false
jbe@156 546 end
jbe@156 547 end
jbe@157 548 -- indicate success:
jbe@157 549 return true
jbe@156 550 end
jbe@156 551
jbe@156 552 function request_pt:_read_body_bytes(remaining, callback)
jbe@156 553 while remaining > 0 do
jbe@156 554 local limit
jbe@156 555 if remaining > self._input_chunk_size then
jbe@156 556 limit = self._input_chunk_size
jbe@156 557 else
jbe@156 558 limit = remaining
jbe@156 559 end
jbe@156 560 local chunk, status = self:_read(limit)
jbe@156 561 if status == "eof" then
jbe@156 562 self:_error("400 Bad Request", "Unexpected EOF while reading chunk of request body")
jbe@156 563 return false
jbe@156 564 end
jbe@156 565 remaining = remaining - limit
jbe@156 566 if self._body_streamer then
jbe@156 567 self._body_streamer(chunk)
jbe@156 568 end
jbe@156 569 end
jbe@157 570 return true
jbe@156 571 end
jbe@156 572
jbe@154 573 function request_pt:_assert_not_faulty()
jbe@154 574 assert(not self._faulty, "Tried to use faulty request handle")
jbe@154 575 end
jbe@154 576
jbe@154 577 function request_pt:_write_yield()
jbe@157 578 self:_consume_some_input()
jbe@154 579 self._poll(self._socket_set, self._socket_set)
jbe@154 580 end
jbe@154 581
jbe@154 582 function request_pt:_write(...)
jbe@154 583 assert(self._socket:write_call(self._write_yield_closure, ...))
jbe@154 584 end
jbe@154 585
jbe@154 586 function request_pt:_flush(...)
jbe@154 587 assert(self._socket:write_call(self._write_yield_closure, ...))
jbe@154 588 end
jbe@154 589
jbe@154 590 -- function creating a HTTP handler:
jbe@154 591 function generate_handler(handler, options)
jbe@154 592 -- swap arguments if necessary (for convenience):
jbe@154 593 if type(handler) ~= "function" and type(options) == "function" then
jbe@154 594 handler, options = options, handler
jbe@154 595 end
jbe@154 596 local request = setmetatable({}, request_mt)
jbe@154 597 request:_init(handler, options)
jbe@154 598 return request._handler_closure
jbe@154 599 end
jbe@154 600
jbe@0 601 return _M
jbe@0 602

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