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annotate src/luan/modules/http/Http.luan @ 1136:d30d400fd43d

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add http/jetty
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 29 Jan 2018 17:50:49 -0700
parents 8c999ab85e33
children 0842b9b570f8
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1 java()
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2 local Luan = require "luan:Luan.luan"
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3 local error = Luan.error
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4 local ipairs = Luan.ipairs or error()
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5 local pairs = Luan.pairs or error()
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6 local set_metatable = Luan.set_metatable or error()
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7 local Io = require "luan:Io.luan"
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8 local Html = require "luan:Html.luan"
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9 local url_encode = Html.url_encode or error()
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10 local Table = require "luan:Table.luan"
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11 local clear = Table.clear or error()
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12 local Package = require "luan:Package.luan"
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13 local String = require "luan:String.luan"
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14 local matches = String.matches or error()
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15 local Implementation = require "luan:http/Implementation.luan"
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16 local HttpServicer = require(Implementation.java.."HttpServicer")
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17 local IoLuan = require "java:luan.modules.IoLuan"
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18
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19 local Http = {}
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20
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21 local singular_metatable = {}
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22
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23 function singular_metatable.__index(table,key)
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24 local list = table.__plural[key]
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25 return list and list[1]
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26 end
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27
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28 function singular_metatable.__new_index(table,key,value)
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29 table.__plural[key] = value and {value}
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30 end
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31
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32 function singular_metatable.__pairs(table)
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33 local iter = pairs(table.__plural)
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34 return function()
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35 local key, value = iter()
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36 return key, value and value[1]
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37 end
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38 end
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39
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40 local function sent_error(_,_,_)
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41 error "headers are not accessible after you start writing content"
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42 end
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43
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44 local sent_error_metatable = { __index=sent_error, __new_index=sent_error }
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45
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46 function Http.sent_headers(headers)
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47 clear(headers)
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48 set_metatable(headers,sent_error_metatable)
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49 end
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51
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52 local function new_common(this)
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53 this = this or {}
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54 this.headers = {}
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55 this.header = {__plural=this.headers}
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56 set_metatable(this.header,singular_metatable)
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57 return this
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58 end
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59
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60
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61 function Http.new_request(this)
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62 this = new_common(this)
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63 this.method = "GET" -- default
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64 -- this.path
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65 -- this.protocol
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66 this.scheme = "http" -- default
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67 this.port = 80 -- default
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68 this.parameters = {}
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69 this.parameter = {__plural=this.parameters}
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70 set_metatable(this.parameter,singular_metatable)
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71 this.cookie = {}
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72
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73 function this.query_string()
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74 local string_uri = Io.uri "string:"
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75 local out = string_uri.text_writer()
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76 local and_char = ""
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77 for name, values in pairs(this.parameters) do
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78 for _, value in ipairs(values) do
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79 out.write( and_char, url_encode(name), "=", url_encode(value) )
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80 and_char = "&"
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81 end
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82 end
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83 out.close()
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84 local s = string_uri.read_text()
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85 return s ~= "" and s or nil
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86 end
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87
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88 function this.url()
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89 local url = this.scheme.."://"..this.header.host..this.path
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90 if this.method ~= "POST" then
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91 local query = this.query_string()
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92 if query ~= nil then
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93 url = url.."?"..query
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94 end
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95 end
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96 return url
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97 end
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98
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99 return this
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100 end
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101
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102 local STATUS = {
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103 OK = 200
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104 MOVED_PERMANENTLY = 301
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105 -- add more as needed
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106 }
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107 Http.STATUS = STATUS
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108
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109 function Http.new_response(this)
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110 this = new_common(this)
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111 this.status = STATUS.OK
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112 if this.java ~= nil then
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113 this.send_redirect = this.java.sendRedirect
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114 this.send_error = this.java.sendError
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115
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116 function this.set_cookie(name,value,is_persistent,domain)
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117 HttpServicer.setCookie(Http.request.java,this.java,name,value,is_persistent,domain)
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118 end
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119
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120 function this.remove_cookie(name,domain)
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121 HttpServicer.removeCookie(Http.request.java,this.java,name,domain)
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122 end
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123
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124 function this.set()
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125 HttpServicer.setResponse(this,this.java)
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126 Http.sent_headers(this.headers)
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127 end
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128
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129 function this.text_writer()
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130 this.java.setCharacterEncoding "UTF-8"
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131 this.java.setContentType "text/html; charset=UTF-8"
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132 this.set()
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133 return IoLuan.textWriter(this.java.getWriter())
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134 end
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135
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136 function this.binary_writer()
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137 this.set()
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138 return IoLuan.binaryWriter(this.java.getOutputStream())
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139 end
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140
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141 function this.reset()
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142 this.java.reset()
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143 set_metatable(this.headers,nil)
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144 end
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145 end
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146 return this
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147 end
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148
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149 -- request = new_request{} -- filled in by HttpServicer
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150 -- response = new_response{} -- filled in by HttpServicer
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151
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152
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153 Http.per_session_pages = {}
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154
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155 function Http.per_session(page)
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156 Http.per_session_pages[page] = true
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157 end
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158
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159 function Http.clear_session()
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160 Http.request.java.getSession().removeAttribute("luan")
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161 end
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162
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163
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164 function Http.uncache_site()
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165 for k in pairs(Table.copy(Package.loaded)) do
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166 if matches(k,"^site:") then
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167 Package.loaded[k] = nil
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168 end
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169 end
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170 end
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171
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172 Http.run_later = HttpServicer.run_later
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173
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174 return Http