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1 #!/usr/bin/env lua
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2
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3 -- module preamble
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4 local _G, _M = _ENV, {}
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5 _ENV = setmetatable({}, {
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6 __index = function(self, key)
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7 local value = _M[key]; if value ~= nil then return value end
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8 return _G[key]
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9 end,
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10 __newindex = _M
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11 })
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12
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13 -- function that encodes certain HTML entities:
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14 -- (not used by the library itself)
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15 function encode_html(text)
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16 return (
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17 string.gsub(
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18 text, '[<>&"]',
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19 function(char)
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20 if char == '<' then
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21 return "<"
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22 elseif char == '>' then
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23 return ">"
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24 elseif char == '&' then
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25 return "&"
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26 elseif char == '"' then
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27 return """
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28 end
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29 end
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30 )
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31 )
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32
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33 end
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34
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35 -- function that encodes special characters for URIs:
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36 -- (not used by the library itself)
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37 function encode_uri(text)
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38 return (
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39 string.gsub(text, "[^0-9A-Za-z_%.~-]",
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40 function (char)
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41 return string.format("%%%02x", string.byte(char))
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42 end
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43 )
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44 )
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45 end
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46
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47 -- function undoing URL encoding:
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48 do
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49 local b0 = string.byte("0")
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50 local b9 = string.byte("9")
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51 local bA = string.byte("A")
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52 local bF = string.byte("F")
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53 local ba = string.byte("a")
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54 local bf = string.byte("f")
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55 function decode_uri(str)
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56 return (
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57 string.gsub(
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58 string.gsub(str, "%+", " "),
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59 "%%([0-9A-Fa-f][0-9A-Fa-f])",
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60 function(hex)
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61 local n1, n2 = string.byte(hex, 1, 2)
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62 if n1 >= b0 and n1 <= b9 then n1 = n1 - b0
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63 elseif n1 >= bA and n1 <= bF then n1 = n1 - bA + 10
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64 elseif n1 >= ba and n1 <= bf then n1 = n1 - ba + 10
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65 else error("Assertion failed") end
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66 if n2 >= b0 and n2 <= b9 then n2 = n2 - b0
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67 elseif n2 >= bA and n2 <= bF then n2 = n2 - bA + 10
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68 elseif n2 >= ba and n2 <= bf then n2 = n2 - ba + 10
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69 else error("Assertion failed") end
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70 return string.char(n1 * 16 + n2)
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71 end
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72 )
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73 )
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74 end
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75 end
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76
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77 -- status codes that carry no response body (in addition to 1xx):
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78 -- (set to "zero_content_length" if Content-Length header is required)
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79 status_without_response_body = {
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80 ["101"] = true, -- list 101 to allow protocol switch
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81 ["204"] = true,
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82 ["205"] = "zero_content_length",
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83 ["304"] = true
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84 }
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85
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86 -- handling of GET/POST param tables:
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87 local new_params_list -- defined later
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88 do
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89 local params_list_mapping = setmetatable({}, {__mode="k"})
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90 local function nextnonempty(tbl, key)
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91 while true do
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92 key = next(tbl, key)
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93 if key == nil then
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94 return nil
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95 end
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96 local value = tbl[key]
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97 if #value > 0 then
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98 return key, value
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99 end
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100 end
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101 end
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102 local function nextvalue(tbl, key)
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103 while true do
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104 key = next(tbl, key)
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105 if key == nil then
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106 return nil
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107 end
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108 local value = tbl[key][1]
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109 if value ~= nil then
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110 return key, value
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111 end
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112 end
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113 end
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114 local params_list_metatable = {
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115 __index = function(self, key)
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116 local tbl = {}
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117 self[key] = tbl
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118 return tbl
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119 end,
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120 __pairs = function(self)
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121 return nextnonempty, self, nil
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122 end
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123 }
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124 local params_metatable = {
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125 __index = function(self, key)
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126 return params_list_mapping[self][key][1]
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127 end,
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128 __newindex = function(self, key, value)
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129 params_list_mapping[self][key] = {value}
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130 end,
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131 __pairs = function(self)
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132 return nextvalue, params_list_mapping[self], nil
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133 end
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134 }
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135 -- returns a table to store key value-list pairs (i.e. multiple values),
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136 -- and a second table automatically mapping keys to the first value
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137 -- using the key value-list pairs in the first table:
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138 new_params_list = function()
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139 local params_list = setmetatable({}, params_list_metatable)
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140 local params = setmetatable({}, params_metatable)
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141 params_list_mapping[params] = params_list
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142 return params_list, params
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143 end
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144 end
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145
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146 -- parses URL encoded form data and stores it in
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147 -- a key value-list pairs structure that has to be
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148 -- previously obtained by calling by new_params_list():
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149 local function read_urlencoded_form(tbl, data)
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150 for rawkey, rawvalue in string.gmatch(data, "([^?=&]*)=([^?=&]*)") do
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151 local subtbl = tbl[decode_uri(rawkey)]
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152 subtbl[#subtbl+1] = decode_uri(rawvalue)
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153 end
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154 end
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155
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156 -- extracts first value from each subtable:
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157 local function get_first_values(tbl)
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158 local newtbl = {}
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159 for key, subtbl in pairs(tbl) do
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160 newtbl[key] = subtbl[1]
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161 end
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162 return newtbl
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163 end
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164
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165 function generate_handler(handler, options)
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166 -- swap arguments if necessary (for convenience):
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167 if type(handler) ~= "function" and type(options) == "function" then
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168 handler, options = options, handler
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169 end
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jbe@160
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170 -- helper function to process options:
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171 local function default(name, default_value)
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172 local value = options[name]
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173 if value == nil then
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174 return default_value
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175 else
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176 return value or nil
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177 end
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178 end
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179 -- process options:
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180 options = options or {}
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181 local preamble = "" -- preamble sent with every(!) HTTP response
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182 do
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183 -- named arg "static_headers" is used to create the preamble:
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184 local s = options.static_headers
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185 local t = {}
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186 if s then
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187 if type(s) == "string" then
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188 for line in string.gmatch(s, "[^\r\n]+") do
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189 t[#t+1] = line
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190 end
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191 else
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192 for i, kv in ipairs(options.static_headers) do
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193 if type(kv) == "string" then
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194 t[#t+1] = kv
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195 else
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196 t[#t+1] = kv[1] .. ": " .. kv[2]
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197 end
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198 end
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199 end
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200 end
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201 t[#t+1] = ""
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202 preamble = table.concat(t, "\r\n")
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203 end
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204 local input_chunk_size = options.maximum_input_chunk_size or options.chunk_size or 16384
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205 local output_chunk_size = options.minimum_output_chunk_size or options.chunk_size or 1024
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206 local header_size_limit = options.header_size_limit or 1024*1024
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207 local body_size_limit = options.body_size_limit or 64*1024*1024
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208 local request_idle_timeout = default("request_idle_timeout", 330)
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209 local request_header_timeout = default("request_header_timeout", 30)
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210 local request_body_timeout = default("request_body_timeout", 60)
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211 local response_timeout = default("response_timeout", 1800)
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212 local poll = options.poll_function or moonbridge_io.poll
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213 -- return socket handler:
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214 return function(socket)
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215 local socket_set = {[socket] = true} -- used for poll function
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216 local survive = true -- set to false if process shall be terminated later
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217 local consume -- function that reads some input if possible
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218 -- function that drains some input if possible:
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219 local function drain()
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220 local bytes, status = socket:drain_nb(input_chunk_size)
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221 if not bytes or status == "eof" then
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222 consume = nil
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223 end
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224 end
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225 -- function trying to unblock socket by reading:
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226 local function unblock()
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227 if consume then
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228 poll(socket_set, socket_set)
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229 consume()
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230 else
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231 poll(nil, socket_set)
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232 end
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233 end
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jbe@163
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234 -- function that enforces consumption of all input:
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235 local function consume_all()
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236 while consume do
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237 poll(socket_set, nil)
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238 consume()
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239 end
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240 end
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jbe@163
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241 -- handle requests in a loop:
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242 repeat
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243 -- copy limits:
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244 local remaining_header_size_limit = header_size_limit
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245 local remaining_body_size_limit = body_size_limit
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246 -- table for caching nil values:
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247 local headers_value_nil = {}
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248 -- create a new request object with metatable:
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249 local request -- allow references to local variable
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250 request = {
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251 -- allow access to underlying socket:
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252 socket = socket,
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253 -- cookies are simply stored in a table:
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254 cookies = {},
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255 -- table mapping header field names to value-lists
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256 -- (raw access, but case-insensitive):
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257 headers = setmetatable({}, {
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258 __index = function(self, key)
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259 local lowerkey = string.lower(key)
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260 if lowerkey == key then
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261 return
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262 end
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263 local result = rawget(self, lowerkey)
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264 if result == nil then
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265 result = {}
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266 end
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267 self[lowerkey] = result
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268 self[key] = result
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269 return result
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270 end
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271 }),
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272 -- table mapping header field names to value-lists
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273 -- (for headers with comma separated values):
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274 headers_csv_table = setmetatable({}, {
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275 __index = function(self, key)
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276 local result = {}
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277 for i, line in ipairs(request.headers[key]) do
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278 for entry in string.gmatch(line, "[^,]+") do
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279 local value = string.match(entry, "^[ \t]*(..-)[ \t]*$")
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280 if value then
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281 result[#result+1] = value
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282 end
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283 end
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284 end
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285 self[key] = result
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286 return result
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287 end
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288 }),
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289 -- table mapping header field names to a comma separated string
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290 -- (for headers with comma separated values):
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291 headers_csv_string = setmetatable({}, {
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292 __index = function(self, key)
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293 local result = {}
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294 for i, line in ipairs(request.headers[key]) do
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295 result[#result+1] = line
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296 end
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297 result = table.concat(result, ", ")
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298 self[key] = result
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299 return result
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300 end
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301 }),
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302 -- table mapping header field names to a single string value
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303 -- (or false if header has been sent multiple times):
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304 headers_value = setmetatable({}, {
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305 __index = function(self, key)
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306 if headers_value_nil[key] then
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307 return nil
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308 end
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jbe@165
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309 local result = nil
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310 local values = request.headers_csv_table[key]
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jbe@165
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311 if #values == 0 then
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312 headers_value_nil[key] = true
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313 elseif #values == 1 then
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314 result = values[1]
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315 else
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316 result = false
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317 end
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jbe@165
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318 self[key] = result
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319 return result
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320 end
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jbe@165
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321 }),
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322 -- table mapping header field names to a flag table,
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323 -- indicating if the comma separated value contains certain entries:
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jbe@165
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324 headers_flags = setmetatable({}, {
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jbe@165
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325 __index = function(self, key)
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326 local result = setmetatable({}, {
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327 __index = function(self, key)
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328 local lowerkey = string.lower(key)
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329 local result = rawget(self, lowerkey) or false
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330 self[lowerkey] = result
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331 self[key] = result
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332 return result
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333 end
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jbe@165
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334 })
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jbe@165
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335 for i, value in ipairs(request.headers_csv_table[key]) do
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336 result[string.lower(value)] = true
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337 end
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338 self[key] = result
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339 return result
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340 end
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341 })
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342 }
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jbe@172
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343 -- create metatable for request object:
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jbe@172
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344 local request_mt = {}
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jbe@172
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345 setmetatable(request, request_mt)
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jbe@172
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346 -- callback for request body streaming:
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jbe@172
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347 local process_body_chunk
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jbe@162
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348 -- local variables to track the state:
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jbe@162
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349 local state = "init" -- one of:
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jbe@162
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350 -- "init" (initial state)
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jbe@162
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351 -- "no_status_sent" (configuration complete)
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jbe@162
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352 -- "info_status_sent" (1xx status code has been sent)
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jbe@162
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353 -- "bodyless_status_sent" (204/304 status code has been sent)
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jbe@162
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354 -- "status_sent" (regular status code has been sent)
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jbe@162
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355 -- "headers_sent" (headers have been terminated)
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jbe@162
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356 -- "finished" (request has been answered completely)
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jbe@163
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357 -- "faulty" (I/O or protocaol error)
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jbe@162
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358 local close_requested = false -- "Connection: close" requested
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jbe@162
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359 local close_responded = false -- "Connection: close" sent
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jbe@162
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360 local content_length = nil -- value of Content-Length header sent
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jbe@164
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361 local chunk_parts = {} -- list of chunks to send
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jbe@164
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362 local chunk_bytes = 0 -- sum of lengths of chunks to send
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jbe@172
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363 local streamed_post_params = {} -- mapping from POST field name to stream function
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jbe@172
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364 local streamed_post_param_patterns = {} -- list of POST field pattern and stream function pairs
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jbe@163
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365 -- functions to assert proper output/closing:
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jbe@163
|
366 local function assert_output(...)
|
jbe@163
|
367 local retval, errmsg = ...
|
jbe@163
|
368 if retval then return ... end
|
jbe@163
|
369 state = "faulty"
|
jbe@163
|
370 socket:reset()
|
jbe@163
|
371 error("Could not send data to client: " .. errmsg)
|
jbe@163
|
372 end
|
jbe@163
|
373 local function assert_close(...)
|
jbe@163
|
374 local retval, errmsg = ...
|
jbe@163
|
375 if retval then return ... end
|
jbe@163
|
376 state = "faulty"
|
jbe@163
|
377 error("Could not finish sending data to client: " .. errmsg)
|
jbe@163
|
378 end
|
jbe@164
|
379 -- function to assert non-faulty handle:
|
jbe@164
|
380 local function assert_not_faulty()
|
jbe@164
|
381 assert(state ~= "faulty", "Tried to use faulty request handle")
|
jbe@164
|
382 end
|
jbe@162
|
383 -- functions to send data to the browser:
|
jbe@160
|
384 local function send(...)
|
jbe@163
|
385 assert_output(socket:write_call(unblock, ...))
|
jbe@38
|
386 end
|
jbe@162
|
387 local function send_flush(...)
|
jbe@163
|
388 assert_output(socket:flush_call(unblock, ...))
|
jbe@162
|
389 end
|
jbe@163
|
390 -- function to finish request:
|
jbe@163
|
391 local function finish()
|
jbe@163
|
392 if close_responded then
|
jbe@163
|
393 -- discard any input:
|
jbe@163
|
394 consume = drain
|
jbe@163
|
395 -- close output stream:
|
jbe@163
|
396 send_flush()
|
jbe@163
|
397 assert_close(socket:finish())
|
jbe@163
|
398 -- wait for EOF of peer to avoid immediate TCP RST condition:
|
jbe@163
|
399 consume_all()
|
jbe@163
|
400 -- fully close socket:
|
jbe@163
|
401 assert_close(socket:close())
|
jbe@163
|
402 else
|
jbe@163
|
403 send_flush()
|
jbe@172
|
404 process_body_chunk = nil
|
jbe@163
|
405 consume_all()
|
jbe@163
|
406 end
|
jbe@163
|
407 end
|
jbe@164
|
408 -- function that writes out buffered chunks (without flushing the socket):
|
jbe@164
|
409 function send_chunk()
|
jbe@164
|
410 if chunk_bytes > 0 then
|
jbe@164
|
411 assert_output(socket:write(string.format("%x\r\n", chunk_bytes)))
|
jbe@164
|
412 for i = 1, #chunk_parts do -- TODO: evaluated only once?
|
jbe@164
|
413 send(chunk_parts[i])
|
jbe@164
|
414 chunk_parts[i] = nil
|
jbe@164
|
415 end
|
jbe@164
|
416 chunk_bytes = 0
|
jbe@164
|
417 send("\r\n")
|
jbe@164
|
418 end
|
jbe@164
|
419 end
|
jbe@168
|
420 -- function to report an error:
|
jbe@168
|
421 local function request_error(throw_error, status, text)
|
jbe@168
|
422 local errmsg = "Error while reading request from client. Error response: " .. status
|
jbe@168
|
423 if text then
|
jbe@168
|
424 errmsg = errmsg .. " (" .. text .. ")"
|
jbe@168
|
425 end
|
jbe@168
|
426 if
|
jbe@168
|
427 state == "init" or
|
jbe@168
|
428 state == "no_status_sent" or
|
jbe@168
|
429 state == "info_status_sent"
|
jbe@168
|
430 then
|
jbe@168
|
431 local error_response_status, errmsg2 = pcall(function()
|
jbe@168
|
432 request:monologue()
|
jbe@168
|
433 request:send_status(status)
|
jbe@168
|
434 request:send_header("Content-Type", "text/plain")
|
jbe@168
|
435 request:send_data(status, "\n")
|
jbe@168
|
436 if text then
|
jbe@168
|
437 request:send_data("\n", text, "\n")
|
jbe@168
|
438 end
|
jbe@168
|
439 request:finish()
|
jbe@168
|
440 end)
|
jbe@168
|
441 if not error_response_status then
|
jbe@168
|
442 error("Unexpected error while sending error response: " .. errmsg2)
|
jbe@168
|
443 end
|
jbe@168
|
444 elseif state ~= "faulty" then
|
jbe@169
|
445 state = "faulty"
|
jbe@168
|
446 assert_close(socket:reset())
|
jbe@168
|
447 end
|
jbe@168
|
448 if throw_error then
|
jbe@168
|
449 error(errmsg)
|
jbe@168
|
450 else
|
jbe@168
|
451 return survive
|
jbe@168
|
452 end
|
jbe@168
|
453 end
|
jbe@173
|
454 -- read functions
|
jbe@170
|
455 local function read(...)
|
jbe@170
|
456 local data, status = socket:read_yield(...)
|
jbe@170
|
457 if data == nil then
|
jbe@170
|
458 request_error(true, "400 Bad Request", "Read error")
|
jbe@170
|
459 end
|
jbe@170
|
460 if status == "eof" then
|
jbe@170
|
461 request_error(true, "400 Bad Request", "Unexpected EOF")
|
jbe@170
|
462 end
|
jbe@170
|
463 return data
|
jbe@170
|
464 end
|
jbe@173
|
465 local function read_eof(...)
|
jbe@173
|
466 local data, status = socket:read_yield(...)
|
jbe@173
|
467 if data == nil then
|
jbe@173
|
468 request_error(true, "400 Bad Request", "Read error")
|
jbe@173
|
469 end
|
jbe@173
|
470 if status == "eof" then
|
jbe@173
|
471 if data == "" then
|
jbe@173
|
472 return nil
|
jbe@173
|
473 else
|
jbe@173
|
474 request_error(true, "400 Bad Request", "Unexpected EOF")
|
jbe@173
|
475 end
|
jbe@173
|
476 end
|
jbe@173
|
477 return data
|
jbe@173
|
478 end
|
jbe@168
|
479 -- reads a number of bytes from the socket,
|
jbe@168
|
480 -- optionally feeding these bytes chunk-wise
|
jbe@168
|
481 -- into a callback function:
|
jbe@168
|
482 local function read_body_bytes(remaining)
|
jbe@168
|
483 while remaining > 0 do
|
jbe@168
|
484 local limit
|
jbe@168
|
485 if remaining > input_chunk_size then
|
jbe@168
|
486 limit = input_chunk_size
|
jbe@168
|
487 else
|
jbe@168
|
488 limit = remaining
|
jbe@168
|
489 end
|
jbe@170
|
490 local chunk = read(limit)
|
jbe@168
|
491 remaining = remaining - limit
|
jbe@168
|
492 if process_body_chunk then
|
jbe@168
|
493 process_body_chunk(chunk)
|
jbe@168
|
494 end
|
jbe@168
|
495 end
|
jbe@168
|
496 end
|
jbe@168
|
497 -- coroutine for request body processing:
|
jbe@168
|
498 local function read_body()
|
jbe@168
|
499 if request.headers_flags["Transfer-Encoding"]["chunked"] then
|
jbe@168
|
500 while true do
|
jbe@170
|
501 local line = read(32 + remaining_body_size_limit, "\n")
|
jbe@168
|
502 local zeros, lenstr = string.match(line, "^(0*)([1-9A-Fa-f]+[0-9A-Fa-f]*)\r?\n$")
|
jbe@168
|
503 local chunkext
|
jbe@168
|
504 if lenstr then
|
jbe@168
|
505 chunkext = ""
|
jbe@168
|
506 else
|
jbe@168
|
507 zeros, lenstr, chunkext = string.match(line, "^(0*)([1-9A-Fa-f]+[0-9A-Fa-f]*)([ \t;].-)\r?\n$")
|
jbe@168
|
508 end
|
jbe@168
|
509 if not lenstr or #lenstr > 13 then
|
jbe@168
|
510 request_error(true, "400 Bad Request", "Encoding error while reading chunk of request body")
|
jbe@168
|
511 end
|
jbe@168
|
512 local len = tonumber("0x" .. lenstr)
|
jbe@168
|
513 remaining_body_size_limit = remaining_body_size_limit - (#zeros + #chunkext + len)
|
jbe@168
|
514 if remaining_body_size_limit < 0 then
|
jbe@168
|
515 request_error(true, "413 Request Entity Too Large", "Request body size limit exceeded")
|
jbe@168
|
516 end
|
jbe@168
|
517 if len == 0 then break end
|
jbe@168
|
518 read_body_bytes(len)
|
jbe@170
|
519 local term = read(2, "\n")
|
jbe@168
|
520 if term ~= "\r\n" and term ~= "\n" then
|
jbe@168
|
521 request_error(true, "400 Bad Request", "Encoding error while reading chunk of request body")
|
jbe@168
|
522 end
|
jbe@168
|
523 end
|
jbe@168
|
524 while true do
|
jbe@170
|
525 local line = read(2 + remaining_body_size_limit, "\n")
|
jbe@168
|
526 if line == "\r\n" or line == "\n" then break end
|
jbe@168
|
527 remaining_body_size_limit = remaining_body_size_limit - #line
|
jbe@168
|
528 if remaining_body_size_limit < 0 then
|
jbe@168
|
529 request_error(true, "413 Request Entity Too Large", "Request body size limit exceeded while reading trailer section of chunked request body")
|
jbe@168
|
530 end
|
jbe@168
|
531 end
|
jbe@168
|
532 elseif request_body_content_length then
|
jbe@168
|
533 read_body_bytes(request_body_content_length)
|
jbe@168
|
534 end
|
jbe@168
|
535 end
|
jbe@172
|
536 -- function to setup default request body handling:
|
jbe@172
|
537 local function default_request_body_handling()
|
jbe@172
|
538 local post_params_list, post_params = new_params_list()
|
jbe@172
|
539 local content_type = request.headers_value["Content-Type"]
|
jbe@172
|
540 if content_type then
|
jbe@172
|
541 if
|
jbe@172
|
542 content_type == "application/x-www-form-urlencoded" or
|
jbe@172
|
543 string.match(content_type, "^application/x%-www%-form%-urlencoded *;")
|
jbe@172
|
544 then
|
jbe@172
|
545 read_urlencoded_form(post_params_list, request.body)
|
jbe@172
|
546 request.post_params_list, request.post_params = post_params_list, post_params
|
jbe@172
|
547 else
|
jbe@172
|
548 local boundary = string.match(
|
jbe@172
|
549 content_type,
|
jbe@172
|
550 '^multipart/form%-data[ \t]*[;,][ \t]*boundary="([^"]+)"$'
|
jbe@172
|
551 ) or string.match(
|
jbe@172
|
552 content_type,
|
jbe@172
|
553 '^multipart/form%-data[ \t]*[;,][ \t]*boundary=([^"; \t]+)$'
|
jbe@172
|
554 )
|
jbe@172
|
555 if boundary then
|
jbe@172
|
556 local post_metadata_list, post_metadata = new_params_list()
|
jbe@172
|
557 boundary = "--" .. boundary
|
jbe@172
|
558 local headerdata = ""
|
jbe@172
|
559 local streamer
|
jbe@172
|
560 local field_name
|
jbe@172
|
561 local metadata = {}
|
jbe@172
|
562 local value_parts
|
jbe@172
|
563 local function default_streamer(chunk)
|
jbe@172
|
564 value_parts[#value_parts+1] = chunk
|
jbe@172
|
565 end
|
jbe@172
|
566 local function stream_part_finish()
|
jbe@172
|
567 if streamer == default_streamer then
|
jbe@172
|
568 local value = table.concat(value_parts)
|
jbe@172
|
569 value_parts = nil
|
jbe@172
|
570 if field_name then
|
jbe@172
|
571 local values = post_params_list[field_name]
|
jbe@172
|
572 values[#values+1] = value
|
jbe@172
|
573 local metadata_entries = post_metadata_list[field_name]
|
jbe@172
|
574 metadata_entries[#metadata_entries+1] = metadata
|
jbe@172
|
575 end
|
jbe@172
|
576 else
|
jbe@172
|
577 streamer()
|
jbe@172
|
578 end
|
jbe@172
|
579 headerdata = ""
|
jbe@172
|
580 streamer = nil
|
jbe@172
|
581 field_name = nil
|
jbe@172
|
582 metadata = {}
|
jbe@172
|
583 end
|
jbe@172
|
584 local function stream_part_chunk(chunk)
|
jbe@172
|
585 if streamer then
|
jbe@172
|
586 streamer(chunk)
|
jbe@172
|
587 else
|
jbe@172
|
588 headerdata = headerdata .. chunk
|
jbe@172
|
589 while true do
|
jbe@172
|
590 local line, remaining = string.match(headerdata, "^(.-)\r?\n(.*)$")
|
jbe@172
|
591 if not line then
|
jbe@172
|
592 break
|
jbe@172
|
593 end
|
jbe@172
|
594 if line == "" then
|
jbe@172
|
595 streamer = streamed_post_params[field_name]
|
jbe@172
|
596 if not streamer then
|
jbe@172
|
597 for i, rule in ipairs(streamed_post_param_patterns) do
|
jbe@172
|
598 if string.match(field_name, rule[1]) then
|
jbe@172
|
599 streamer = rule[2]
|
jbe@172
|
600 break
|
jbe@172
|
601 end
|
jbe@172
|
602 end
|
jbe@172
|
603 end
|
jbe@172
|
604 if not streamer then
|
jbe@172
|
605 value_parts = {}
|
jbe@172
|
606 streamer = default_streamer
|
jbe@172
|
607 end
|
jbe@172
|
608 streamer(remaining, field_name, metadata)
|
jbe@172
|
609 return
|
jbe@172
|
610 end
|
jbe@172
|
611 headerdata = remaining
|
jbe@172
|
612 local header_key, header_value = string.match(line, "^([^:]*):[ \t]*(.-)[ \t]*$")
|
jbe@172
|
613 if not header_key then
|
jbe@172
|
614 request_error(true, "400 Bad Request", "Invalid header in multipart/form-data part")
|
jbe@172
|
615 end
|
jbe@172
|
616 header_key = string.lower(header_key)
|
jbe@172
|
617 if header_key == "content-disposition" then
|
jbe@172
|
618 local escaped_header_value = string.gsub(header_value, '"[^"]*"', function(str)
|
jbe@172
|
619 return string.gsub(str, "=", "==")
|
jbe@172
|
620 end)
|
jbe@172
|
621 field_name = string.match(escaped_header_value, ';[ \t]*name="([^"]*)"')
|
jbe@172
|
622 if field_name then
|
jbe@172
|
623 field_name = string.gsub(field_name, "==", "=")
|
jbe@172
|
624 else
|
jbe@172
|
625 field_name = string.match(header_value, ';[ \t]*name=([^"; \t]+)')
|
jbe@172
|
626 end
|
jbe@172
|
627 metadata.file_name = string.match(escaped_header_value, ';[ \t]*filename="([^"]*)"')
|
jbe@172
|
628 if metadata.file_name then
|
jbe@172
|
629 metadata.file_name = string.gsub(metadata.file_name, "==", "=")
|
jbe@172
|
630 else
|
jbe@172
|
631 string.match(header_value, ';[ \t]*filename=([^"; \t]+)')
|
jbe@172
|
632 end
|
jbe@172
|
633 elseif header_key == "content-type" then
|
jbe@172
|
634 metadata.content_type = header_value
|
jbe@172
|
635 elseif header_key == "content-transfer-encoding" then
|
jbe@172
|
636 request_error(true, "400 Bad Request", "Content-transfer-encoding not supported by multipart/form-data parser")
|
jbe@172
|
637 end
|
jbe@172
|
638 end
|
jbe@172
|
639 end
|
jbe@172
|
640 end
|
jbe@172
|
641 local skippart = true -- ignore data until first boundary
|
jbe@172
|
642 local afterbound = false -- interpret 2 bytes after boundary ("\r\n" or "--")
|
jbe@172
|
643 local terminated = false -- final boundary read
|
jbe@172
|
644 local bigchunk = ""
|
jbe@172
|
645 request:set_request_body_streamer(function(chunk)
|
jbe@172
|
646 if chunk == nil then
|
jbe@172
|
647 if not terminated then
|
jbe@172
|
648 request_error(true, "400 Bad Request", "Premature end of multipart/form-data request body")
|
jbe@172
|
649 end
|
jbe@172
|
650 request.post_metadata_list, request.post_metadata = post_metadata_list, post_metadata
|
jbe@172
|
651 end
|
jbe@172
|
652 if terminated then
|
jbe@172
|
653 return
|
jbe@172
|
654 end
|
jbe@172
|
655 bigchunk = bigchunk .. chunk
|
jbe@172
|
656 while true do
|
jbe@172
|
657 if afterbound then
|
jbe@172
|
658 if #bigchunk <= 2 then
|
jbe@172
|
659 return
|
jbe@172
|
660 end
|
jbe@172
|
661 local terminator = string.sub(bigchunk, 1, 2)
|
jbe@172
|
662 if terminator == "\r\n" then
|
jbe@172
|
663 afterbound = false
|
jbe@172
|
664 bigchunk = string.sub(bigchunk, 3)
|
jbe@172
|
665 elseif terminator == "--" then
|
jbe@172
|
666 terminated = true
|
jbe@172
|
667 bigchunk = nil
|
jbe@172
|
668 return
|
jbe@172
|
669 else
|
jbe@172
|
670 request_error(true, "400 Bad Request", "Error while parsing multipart body (expected CRLF or double minus)")
|
jbe@172
|
671 end
|
jbe@172
|
672 end
|
jbe@172
|
673 local pos1, pos2 = string.find(bigchunk, boundary, 1, true)
|
jbe@172
|
674 if not pos1 then
|
jbe@172
|
675 if not skippart then
|
jbe@172
|
676 local safe = #bigchunk-#boundary
|
jbe@172
|
677 if safe > 0 then
|
jbe@172
|
678 stream_part_chunk(string.sub(bigchunk, 1, safe))
|
jbe@172
|
679 bigchunk = string.sub(bigchunk, safe+1)
|
jbe@172
|
680 end
|
jbe@172
|
681 end
|
jbe@172
|
682 return
|
jbe@172
|
683 end
|
jbe@172
|
684 if not skippart then
|
jbe@172
|
685 stream_part_chunk(string.sub(bigchunk, 1, pos1 - 1))
|
jbe@172
|
686 stream_part_finish()
|
jbe@172
|
687 else
|
jbe@172
|
688 boundary = "\r\n" .. boundary
|
jbe@172
|
689 skippart = false
|
jbe@172
|
690 end
|
jbe@172
|
691 bigchunk = string.sub(bigchunk, pos2 + 1)
|
jbe@172
|
692 afterbound = true
|
jbe@172
|
693 end
|
jbe@172
|
694 end)
|
jbe@172
|
695 else
|
jbe@172
|
696 request_error(true, "415 Unsupported Media Type", "Unknown Content-Type of request body")
|
jbe@172
|
697 end
|
jbe@172
|
698 end
|
jbe@172
|
699 end
|
jbe@172
|
700 end
|
jbe@172
|
701 -- function to prepare body processing:
|
jbe@162
|
702 local function prepare()
|
jbe@164
|
703 assert_not_faulty()
|
jbe@172
|
704 if process_body_chunk == nil then
|
jbe@172
|
705 default_request_body_handling()
|
jbe@172
|
706 end
|
jbe@171
|
707 if state ~= "init" then
|
jbe@162
|
708 return
|
jbe@162
|
709 end
|
jbe@171
|
710 consume = coroutine.wrap(read_body)
|
jbe@162
|
711 state = "no_status_sent"
|
jbe@171
|
712 if request.headers_flags["Expect"]["100-continue"] then
|
jbe@171
|
713 request:send_status("100 Continue")
|
jbe@171
|
714 request:finish_headers()
|
jbe@171
|
715 end
|
jbe@162
|
716 end
|
jbe@163
|
717 -- method to ignore input and close connection after response:
|
jbe@163
|
718 function request:monologue()
|
jbe@164
|
719 assert_not_faulty()
|
jbe@163
|
720 if
|
jbe@163
|
721 state == "headers_sent" or
|
jbe@163
|
722 state == "finished"
|
jbe@163
|
723 then
|
jbe@163
|
724 error("All HTTP headers have already been sent")
|
jbe@163
|
725 end
|
jbe@164
|
726 local old_state = state
|
jbe@164
|
727 state = "faulty"
|
jbe@163
|
728 consume = drain
|
jbe@163
|
729 close_requested = true
|
jbe@171
|
730 if old_state == "init" then
|
jbe@163
|
731 state = "no_status_sent"
|
jbe@164
|
732 else
|
jbe@164
|
733 state = old_state
|
jbe@162
|
734 end
|
jbe@162
|
735 end
|
jbe@163
|
736 --
|
jbe@162
|
737 -- method to send a HTTP response status (e.g. "200 OK"):
|
jbe@162
|
738 function request:send_status(status)
|
jbe@162
|
739 prepare()
|
jbe@164
|
740 local old_state = state
|
jbe@164
|
741 state = "faulty"
|
jbe@164
|
742 if old_state == "info_status_sent" then
|
jbe@162
|
743 send_flush("\r\n")
|
jbe@164
|
744 elseif old_state ~= "no_status_sent" then
|
jbe@162
|
745 error("HTTP status has already been sent")
|
jbe@162
|
746 end
|
jbe@162
|
747 local status1 = string.sub(status, 1, 1)
|
jbe@162
|
748 local status3 = string.sub(status, 1, 3)
|
jbe@162
|
749 send("HTTP/1.1 ", status, "\r\n", preamble)
|
jbe@162
|
750 local wrb = status_without_response_body[status3]
|
jbe@162
|
751 if wrb then
|
jbe@162
|
752 state = "bodyless_status_sent"
|
jbe@162
|
753 if wrb == "zero_content_length" then
|
jbe@162
|
754 request:send_header("Content-Length", 0)
|
jbe@162
|
755 end
|
jbe@162
|
756 elseif status1 == "1" then
|
jbe@162
|
757 state = "info_status_sent"
|
jbe@162
|
758 else
|
jbe@162
|
759 state = "status_sent"
|
jbe@162
|
760 end
|
jbe@162
|
761 end
|
jbe@162
|
762 -- method to send a HTTP response header:
|
jbe@162
|
763 -- (key and value must be provided as separate args)
|
jbe@162
|
764 function request:send_header(key, value)
|
jbe@164
|
765 assert_not_faulty()
|
jbe@171
|
766 if state == "init" or state == "no_status_sent" then
|
jbe@162
|
767 error("HTTP status has not been sent yet")
|
jbe@162
|
768 elseif
|
jbe@164
|
769 state == "headers_sent" or
|
jbe@164
|
770 state == "finished"
|
jbe@162
|
771 then
|
jbe@162
|
772 error("All HTTP headers have already been sent")
|
jbe@162
|
773 end
|
jbe@162
|
774 local key_lower = string.lower(key)
|
jbe@162
|
775 if key_lower == "content-length" then
|
jbe@162
|
776 if state == "info_status_sent" then
|
jbe@162
|
777 error("Cannot set Content-Length for informational status response")
|
jbe@162
|
778 end
|
jbe@162
|
779 local cl = assert(tonumber(value), "Invalid content-length")
|
jbe@162
|
780 if content_length == nil then
|
jbe@162
|
781 content_length = cl
|
jbe@162
|
782 elseif content_length == cl then
|
jbe@162
|
783 return
|
jbe@162
|
784 else
|
jbe@162
|
785 error("Content-Length has been set multiple times with different values")
|
jbe@162
|
786 end
|
jbe@162
|
787 elseif key_lower == "connection" then
|
jbe@162
|
788 for entry in string.gmatch(string.lower(value), "[^,]+") do
|
jbe@162
|
789 if string.match(entry, "^[ \t]*close[ \t]*$") then
|
jbe@162
|
790 if state == "info_status_sent" then
|
jbe@162
|
791 error("Cannot set \"Connection: close\" for informational status response")
|
jbe@162
|
792 end
|
jbe@162
|
793 close_responded = true
|
jbe@162
|
794 break
|
jbe@162
|
795 end
|
jbe@162
|
796 end
|
jbe@162
|
797 end
|
jbe@162
|
798 assert_output(socket:write(key, ": ", value, "\r\n"))
|
jbe@162
|
799 end
|
jbe@162
|
800 -- function to terminate header section in response, optionally flushing:
|
jbe@162
|
801 -- (may be called multiple times unless response is finished)
|
jbe@162
|
802 local function finish_headers(with_flush)
|
jbe@162
|
803 if state == "finished" then
|
jbe@162
|
804 error("Response has already been finished")
|
jbe@162
|
805 elseif state == "info_status_sent" then
|
jbe@162
|
806 send_flush("\r\n")
|
jbe@162
|
807 state = "no_status_sent"
|
jbe@162
|
808 elseif state == "bodyless_status_sent" then
|
jbe@162
|
809 if close_requested and not close_responded then
|
jbe@162
|
810 request:send_header("Connection", "close")
|
jbe@162
|
811 end
|
jbe@162
|
812 send("\r\n")
|
jbe@163
|
813 finish()
|
jbe@162
|
814 state = "finished"
|
jbe@162
|
815 elseif state == "status_sent" then
|
jbe@162
|
816 if not content_length then
|
jbe@162
|
817 request:send_header("Transfer-Encoding", "chunked")
|
jbe@162
|
818 end
|
jbe@162
|
819 if close_requested and not close_responded then
|
jbe@162
|
820 request:send_header("Connection", "close")
|
jbe@162
|
821 end
|
jbe@162
|
822 send("\r\n")
|
jbe@162
|
823 if request.method == "HEAD" then
|
jbe@163
|
824 finish()
|
jbe@162
|
825 elseif with_flush then
|
jbe@162
|
826 send_flush()
|
jbe@162
|
827 end
|
jbe@162
|
828 state = "headers_sent"
|
jbe@162
|
829 elseif state ~= "headers_sent" then
|
jbe@162
|
830 error("HTTP status has not been sent yet")
|
jbe@162
|
831 end
|
jbe@162
|
832 end
|
jbe@162
|
833 -- method to finish and flush headers:
|
jbe@162
|
834 function request:finish_headers()
|
jbe@164
|
835 assert_not_faulty()
|
jbe@162
|
836 finish_headers(true)
|
jbe@162
|
837 end
|
jbe@164
|
838 -- method to send body data:
|
jbe@164
|
839 function request:send_data(...)
|
jbe@164
|
840 assert_not_faulty()
|
jbe@164
|
841 if output_state == "info_status_sent" then
|
jbe@164
|
842 error("No (non-informational) HTTP status has been sent yet")
|
jbe@164
|
843 elseif output_state == "bodyless_status_sent" then
|
jbe@164
|
844 error("Cannot send response data for body-less status message")
|
jbe@164
|
845 end
|
jbe@164
|
846 finish_headers(false)
|
jbe@164
|
847 if output_state ~= "headers_sent" then
|
jbe@164
|
848 error("Unexpected internal status in HTTP engine")
|
jbe@164
|
849 end
|
jbe@164
|
850 if request.method == "HEAD" then
|
jbe@164
|
851 return
|
jbe@164
|
852 end
|
jbe@164
|
853 for i = 1, select("#", ...) do
|
jbe@164
|
854 local str = tostring(select(i, ...))
|
jbe@164
|
855 if #str > 0 then
|
jbe@164
|
856 if content_length then
|
jbe@164
|
857 local bytes_to_send = #str
|
jbe@164
|
858 if bytes_sent + bytes_to_send > content_length then
|
jbe@164
|
859 error("Content length exceeded")
|
jbe@164
|
860 else
|
jbe@164
|
861 send(str)
|
jbe@164
|
862 bytes_sent = bytes_sent + bytes_to_send
|
jbe@164
|
863 end
|
jbe@164
|
864 else
|
jbe@164
|
865 chunk_bytes = chunk_bytes + #str
|
jbe@164
|
866 chunk_parts[#chunk_parts+1] = str
|
jbe@164
|
867 end
|
jbe@164
|
868 end
|
jbe@164
|
869 end
|
jbe@164
|
870 if chunk_bytes >= output_chunk_size then
|
jbe@164
|
871 send_chunk()
|
jbe@164
|
872 end
|
jbe@164
|
873 end
|
jbe@165
|
874 -- method to flush output buffer:
|
jbe@165
|
875 function request:flush()
|
jbe@165
|
876 assert_not_faulty()
|
jbe@165
|
877 send_chunk()
|
jbe@165
|
878 send_flush()
|
jbe@165
|
879 end
|
jbe@165
|
880 -- method to finish response:
|
jbe@165
|
881 function request:finish()
|
jbe@165
|
882 assert_not_faulty()
|
jbe@165
|
883 if state == "finished" then
|
jbe@165
|
884 return
|
jbe@165
|
885 elseif state == "info_status_sent" then
|
jbe@165
|
886 error("Informational HTTP response can be finished with :finish_headers() method")
|
jbe@165
|
887 end
|
jbe@165
|
888 finish_headers(false)
|
jbe@165
|
889 if state == "headers_sent" then
|
jbe@165
|
890 if request.method ~= "HEAD" then
|
jbe@165
|
891 state = "faulty"
|
jbe@165
|
892 if content_length then
|
jbe@165
|
893 if bytes_sent ~= content_length then
|
jbe@165
|
894 error("Content length not used")
|
jbe@165
|
895 end
|
jbe@165
|
896 else
|
jbe@165
|
897 send_chunk()
|
jbe@165
|
898 send("0\r\n\r\n")
|
jbe@165
|
899 end
|
jbe@165
|
900 finish()
|
jbe@165
|
901 end
|
jbe@165
|
902 state = "finished"
|
jbe@165
|
903 elseif state ~= "finished" then
|
jbe@165
|
904 error("Unexpected internal status in HTTP engine")
|
jbe@165
|
905 end
|
jbe@165
|
906 end
|
jbe@172
|
907 -- method to register POST param stream handler for a single field name:
|
jbe@172
|
908 function request:stream_post_param(field_name, callback)
|
jbe@172
|
909 if state ~= "init" then
|
jbe@172
|
910 error("Cannot setup request body streamer at this stage")
|
jbe@172
|
911 end
|
jbe@172
|
912 streamed_post_params[field_name] = callback
|
jbe@172
|
913 end
|
jbe@172
|
914 -- method to register POST param stream handler for a field name pattern:
|
jbe@172
|
915 function request:stream_post_params(pattern, callback)
|
jbe@172
|
916 if state ~= "init" then
|
jbe@172
|
917 error("Cannot setup request body streamer at this stage")
|
jbe@172
|
918 end
|
jbe@172
|
919 streamed_post_param_patterns[#streamed_post_param_patterns+1] = {pattern, callback}
|
jbe@172
|
920 end
|
jbe@172
|
921 -- method to register request body stream handler
|
jbe@172
|
922 function request:set_request_body_streamer(callback)
|
jbe@172
|
923 if state ~= "init" then
|
jbe@172
|
924 error("Cannot setup request body streamer at this stage")
|
jbe@172
|
925 end
|
jbe@172
|
926 local inprogress = false
|
jbe@172
|
927 local buffer = {}
|
jbe@172
|
928 process_body_chunk = function(chunk)
|
jbe@172
|
929 if inprogress then
|
jbe@172
|
930 buffer[#buffer+1] = chunk
|
jbe@172
|
931 else
|
jbe@172
|
932 inprogress = true
|
jbe@172
|
933 callback(chunk)
|
jbe@172
|
934 while #buffer > 0 do
|
jbe@172
|
935 chunk = table.concat(buffer)
|
jbe@172
|
936 buffer = {}
|
jbe@172
|
937 callback(chunk)
|
jbe@172
|
938 end
|
jbe@172
|
939 inprogress = false
|
jbe@172
|
940 end
|
jbe@172
|
941 end
|
jbe@172
|
942 end
|
jbe@172
|
943 -- method to start reading request body
|
jbe@172
|
944 function request:consume_input()
|
jbe@172
|
945 prepare()
|
jbe@172
|
946 consume_all()
|
jbe@172
|
947 end
|
jbe@172
|
948 -- method to stream request body
|
jbe@172
|
949 function request:stream_request_body(callback)
|
jbe@172
|
950 request:set_request_body_streamer(function(chunk)
|
jbe@172
|
951 if chunk ~= nil then
|
jbe@172
|
952 callback(chunk)
|
jbe@172
|
953 end
|
jbe@172
|
954 end)
|
jbe@172
|
955 request:consume_input()
|
jbe@172
|
956 end
|
jbe@172
|
957 -- metamethod to read special attibutes of request object:
|
jbe@172
|
958 function request_mt:__index(key, value)
|
jbe@172
|
959 if key == "body" then
|
jbe@172
|
960 local chunks = {}
|
jbe@172
|
961 request:stream_request_body(function(chunk)
|
jbe@172
|
962 chunks[#chunks+1] = chunk
|
jbe@172
|
963 end)
|
jbe@172
|
964 self.body = table.concat(chunks)
|
jbe@172
|
965 return self.body
|
jbe@172
|
966 elseif
|
jbe@172
|
967 key == "post_params_list" or key == "post_params" or
|
jbe@172
|
968 key == "post_metadata_list" or key == "post_metadata"
|
jbe@172
|
969 then
|
jbe@172
|
970 prepare()
|
jbe@172
|
971 consume_all()
|
jbe@172
|
972 return self[key]
|
jbe@172
|
973 end
|
jbe@172
|
974 end
|
jbe@173
|
975 -- coroutine for reading headers:
|
jbe@173
|
976 local function read_headers()
|
jbe@173
|
977 -- read and parse request line:
|
jbe@173
|
978 local line = read_eof(remaining_header_size_limit, "\n")
|
jbe@173
|
979 if not line then
|
jbe@173
|
980 return false, survive
|
jbe@173
|
981 end
|
jbe@173
|
982 remaining_header_size_limit = remaining_header_size_limit - #line
|
jbe@173
|
983 if remaining_header_size_limit == 0 then
|
jbe@173
|
984 return false, request_error(false, "414 Request-URI Too Long")
|
jbe@173
|
985 end
|
jbe@173
|
986 local target, proto
|
jbe@173
|
987 request.method, target, proto =
|
jbe@173
|
988 line:match("^([^ \t\r]+)[ \t]+([^ \t\r]+)[ \t]*([^ \t\r]*)[ \t]*\r?\n$")
|
jbe@173
|
989 if not request.method then
|
jbe@173
|
990 return false, request_error(false, "400 Bad Request")
|
jbe@173
|
991 elseif proto ~= "HTTP/1.1" then
|
jbe@173
|
992 return false, request_error(false, "505 HTTP Version Not Supported")
|
jbe@173
|
993 end
|
jbe@173
|
994 -- read and parse headers:
|
jbe@173
|
995 while true do
|
jbe@173
|
996 local line = read(remaining_header_size_limit, "\n");
|
jbe@173
|
997 remaining_header_size_limit = remaining_header_size_limit - #line
|
jbe@173
|
998 if line == "\r\n" or line == "\n" then
|
jbe@173
|
999 break
|
jbe@173
|
1000 end
|
jbe@173
|
1001 if remaining_header_size_limit == 0 then
|
jbe@173
|
1002 return false, request_error(false, "431 Request Header Fields Too Large")
|
jbe@173
|
1003 end
|
jbe@173
|
1004 local key, value = string.match(line, "^([^ \t\r]+):[ \t]*(.-)[ \t]*\r?\n$")
|
jbe@173
|
1005 if not key then
|
jbe@173
|
1006 return false, request_error(false, "400 Bad Request")
|
jbe@173
|
1007 end
|
jbe@173
|
1008 local values = request.headers[key]
|
jbe@173
|
1009 values[#values+1] = value
|
jbe@173
|
1010 end
|
jbe@173
|
1011 return true -- success
|
jbe@173
|
1012 end
|
jbe@160
|
1013 -- wait for input:
|
jbe@160
|
1014 if not poll(socket_set, nil, request_idle_timeout) then
|
jbe@163
|
1015 return request_error(false, "408 Request Timeout", "Idle connection timed out")
|
jbe@38
|
1016 end
|
jbe@173
|
1017 -- read headers (with timeout):
|
jbe@173
|
1018 do
|
jbe@173
|
1019 local coro = coroutine.wrap(read_headers)
|
jbe@173
|
1020 local starttime = request_header_timeout and moonbridge_io.timeref()
|
jbe@173
|
1021 while true do
|
jbe@173
|
1022 local status, retval = coro()
|
jbe@173
|
1023 if status == nil then
|
jbe@173
|
1024 local remaining
|
jbe@173
|
1025 if request_header_timeout then
|
jbe@173
|
1026 remaining = request_header_timeout - moonbridge_io.timeref(starttime)
|
jbe@173
|
1027 end
|
jbe@173
|
1028 if not poll(socket_set, nil, remaining) then
|
jbe@173
|
1029 return request_error(false, "408 Request Timeout", "Timeout while receiving headers")
|
jbe@173
|
1030 end
|
jbe@173
|
1031 elseif status == false then
|
jbe@173
|
1032 return retval
|
jbe@173
|
1033 elseif status == true then
|
jbe@173
|
1034 break
|
jbe@173
|
1035 else
|
jbe@173
|
1036 error("Unexpected yield value")
|
jbe@173
|
1037 end
|
jbe@173
|
1038 end
|
jbe@173
|
1039 end
|
jbe@173
|
1040 -- process "Connection: close" header if existent:
|
jbe@173
|
1041 connection_close_requested = request.headers_flags["Connection"]["close"]
|
jbe@173
|
1042 -- process "Content-Length" header if existent:
|
jbe@173
|
1043 do
|
jbe@173
|
1044 local values = request.headers_csv_table["Content-Length"]
|
jbe@173
|
1045 if #values > 0 then
|
jbe@173
|
1046 request_body_content_length = tonumber(values[1])
|
jbe@173
|
1047 local proper_value = tostring(request_body_content_length)
|
jbe@173
|
1048 for i, value in ipairs(values) do
|
jbe@173
|
1049 value = string.match(value, "^0*(.*)")
|
jbe@173
|
1050 if value ~= proper_value then
|
jbe@173
|
1051 return request_error(false, "400 Bad Request", "Content-Length header(s) invalid")
|
jbe@173
|
1052 end
|
jbe@173
|
1053 end
|
jbe@173
|
1054 if request_body_content_length > remaining_body_size_limit then
|
jbe@173
|
1055 return request_error(false, "413 Request Entity Too Large", "Announced request body size is too big")
|
jbe@173
|
1056 end
|
jbe@173
|
1057 end
|
jbe@173
|
1058 end
|
jbe@173
|
1059 -- process "Transfer-Encoding" header if existent:
|
jbe@173
|
1060 do
|
jbe@173
|
1061 local flag = request.headers_flags["Transfer-Encoding"]["chunked"]
|
jbe@173
|
1062 local list = request.headers_csv_table["Transfer-Encoding"]
|
jbe@173
|
1063 if (flag and #list ~= 1) or (not flag and #list ~= 0) then
|
jbe@173
|
1064 return request_error(false, "400 Bad Request", "Unexpected Transfer-Encoding")
|
jbe@173
|
1065 end
|
jbe@173
|
1066 end
|
jbe@173
|
1067 -- process "Expect" header if existent:
|
jbe@173
|
1068 for i, value in ipairs(request.headers_csv_table["Expect"]) do
|
jbe@173
|
1069 if string.lower(value) ~= "100-continue" then
|
jbe@173
|
1070 return request_error(false, "417 Expectation Failed", "Unexpected Expect header")
|
jbe@173
|
1071 end
|
jbe@173
|
1072 end
|
jbe@173
|
1073 -- get mandatory Host header according to RFC 7230:
|
jbe@173
|
1074 request.host = request.headers_value["Host"]
|
jbe@173
|
1075 if not request.host then
|
jbe@173
|
1076 return request_error(false, "400 Bad Request", "No valid host header")
|
jbe@173
|
1077 end
|
jbe@173
|
1078 -- parse request target:
|
jbe@173
|
1079 request.path, request.query = string.match(target, "^/([^?]*)(.*)$")
|
jbe@173
|
1080 if not request.path then
|
jbe@173
|
1081 local host2
|
jbe@173
|
1082 host2, request.path, request.query = string.match(target, "^[Hh][Tt][Tt][Pp]://([^/?]+)/?([^?]*)(.*)$")
|
jbe@173
|
1083 if host2 then
|
jbe@173
|
1084 if request.host ~= host2 then
|
jbe@173
|
1085 return request_error(false, "400 Bad Request", "No valid host header")
|
jbe@173
|
1086 end
|
jbe@173
|
1087 elseif not (target == "*" and request.method == "OPTIONS") then
|
jbe@173
|
1088 return request_error(false, "400 Bad Request", "Invalid request target")
|
jbe@173
|
1089 end
|
jbe@173
|
1090 end
|
jbe@173
|
1091 -- parse GET params:
|
jbe@173
|
1092 if request.query then
|
jbe@173
|
1093 read_urlencoded_form(request.get_params_list, request.query)
|
jbe@173
|
1094 end
|
jbe@173
|
1095 -- parse cookies:
|
jbe@173
|
1096 for i, line in ipairs(request.headers["Cookie"]) do
|
jbe@173
|
1097 for rawkey, rawvalue in
|
jbe@173
|
1098 string.gmatch(line, "([^=; ]*)=([^=; ]*)")
|
jbe@173
|
1099 do
|
jbe@173
|
1100 request.cookies[decode_uri(rawkey)] = decode_uri(rawvalue)
|
jbe@173
|
1101 end
|
jbe@173
|
1102 end
|
jbe@173
|
1103 -- (re)set timeout for handler:
|
jbe@173
|
1104 timeout(response_timeout or 0)
|
jbe@173
|
1105 -- call underlying handler and remember boolean result:
|
jbe@173
|
1106 if handler(request) ~= true then survive = false end
|
jbe@173
|
1107 -- finish request (unless already done by underlying handler):
|
jbe@173
|
1108 request:finish()
|
jbe@173
|
1109 -- stop timeout timer:
|
jbe@173
|
1110 timeout(0)
|
jbe@162
|
1111 until close_responded
|
jbe@0
|
1112 return survive
|
jbe@0
|
1113 end
|
jbe@0
|
1114 end
|
jbe@0
|
1115
|
jbe@0
|
1116 return _M
|
jbe@0
|
1117
|