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1
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2 Moonbridge reference
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3 ====================
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4
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5
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6
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7 Global function listen{...}
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8 ---------------------------
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9
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10 This function initializes the Moonbridge Network Server. It may be called
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11 multiple times. However, it is not allowed to register additional listeners by
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12 calling listen{...} from a "prepare", "connect", or "finish" handler.
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13
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14 See file "example.lua" for parametrization of the listen{...} function.
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15
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16 Warning: Moonbridge will fork the Lua environment to handle parallel requests.
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17 Functions provided as "prepare", "connect", and "finish" handlers may access
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18 global variables, but for every child process these global variables will not
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19 be shared! If you require a global state, a DBMS, cache server, or similar is
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20 necessary.
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21
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22
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23
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24 Global function timeout(...)
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25 ----------------------------
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26
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27 Calling this function with a positive number (time in seconds) sets a timer
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28 that kills the current process after the selected time runs out. The remaining
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29 time can be queried by calling this function without arguments.
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30
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31 Calling this function with a single argument that is the number zero will
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32 disable the timeout.
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33
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34 Another mode of operation is selected by passing two arguments: a time (in
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35 seconds) as first argument and a function as second argument. In this case, a
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36 sub-timer will be used to limit the execution time of the function. In case of
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37 timeout, the process will be killed (and the timeout function does not return).
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38 If the time for the sub-timer is longer than a previously set timeout (using
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39 the timeout(...) function with one argument), the shorter timeout (of the
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40 previous call of timeout(...)) will have precedence.
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41
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42 Timers are also automatically reset (disabled) when a handler (prepare handler
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43 or connect handler) returns. To shutdown processes after a certain time waiting
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44 for a new request, use the idle_time parameter of the listen function.
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45
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46
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47
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48 Socket object passed to "connect" handler
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49 -----------------------------------------
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50
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51 For every incoming connection, the registered "connect" handler is called with
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52 a single socket object as argument, which is described below:
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53
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54
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55 ### socket:close()
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56
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57 Closes the socket connection (input and output stream) by flushing all data and
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58 sending a TCP FIN packet.
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59
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60 Returns true on success, or nil plus error message in case of an I/O error.
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61 Using this method on sockets that have already been closed (or reset) will
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62 throw an error.
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63
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64 Warning: Pending data on the input stream may cause connection aborts (TCP RST)
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65 when network connections are used. All pending input data should have been read
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66 (or drained) before calling socket:close(). Use socket:finish() to send a
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67 TCP FIN packet to the peer before waiting for EOF from the peer.
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68
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69 A socket passed to the "connect" handler will be closed automatically if it was
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70 not closed by the "connect" handler and if the "connect" handler returns
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71 normally (i.e. without throwing an error). If the "connect" handler throws an
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72 error, then the socket will be reset. See socket:reset().
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73
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74
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75 ### socket:drain(maxlen, terminator)
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76
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77 Same as socket:read(maxlen, terminator), but discards the input and returns the
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78 number of discarded bytes (as first return value) and the status code ("term",
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79 "maxlen", "eof" as second return value).
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80
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81 In case of an I/O error, nil (as first return value) plus an error message (as
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82 second return value) are returned.
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83
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84
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85 ### socket:drain_call(waitfunc, maxlen, terminator)
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86
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87 Same as socket:drain(maxlen, terminator), but calls waitfunc() (in an infinite
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88 loop) as long as the reading is blocked.
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89
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90
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91 ### socket:drain_nb(maxlen, terminator)
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92
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93 Same as socket:drain(maxlen, terminator), but non-blocking. The status code
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94 (which is returned as second return value) may therefore be "term", "maxlen",
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95 "eof", or "block".
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96
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97 In case of an I/O error, nil (as first return value) plus an error message (as
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98 second return value) are returned.
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99
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100
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101 ### socket:drain_yield(maxlen, terminator)
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102
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103 Alias for socket:drain_call(coroutine.yield, maxlen, terminator)
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104
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105
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106 ### socket:finish()
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107
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108 Sends a TCP FIN packet to indicate EOF on write stream. Subsequent reads are
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109 still possible. When there is no more input data to be read, the connection
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110 should finally be closed with socket:close().
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111
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112 In case of local sockets (Unix Domain Sockets), socket:finish() simply closes
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113 the underlying socket and emulates EOF on subsequent reads. Also in this case,
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114 the connection should be finally closed with socket:close().
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115
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116
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117 ### socket:flush(...)
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118
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119 Same as socket:write(...) but additionally flushes the socket (i.e. all pending
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120 data is passed to the operating system).
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121
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122 In case of an I/O error, nil (as first return value) plus an error message (as
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123 second return value) are returned. On success, the socket userdata object is
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124 returned.
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125
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126
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127 ### socket:flush_call(waitfunc, ...)
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128
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129 Same as socket:flush(...), but calls waitfunc() (in an infinite loop) as long
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130 as the writing is blocked.
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131
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132
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133 ### socket:flush_nb(...)
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134
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135 Same as socket:write_nb(...) but additionally flushes the socket (i.e. all
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136 pending data is passed to the operating system). The total number of bytes that
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137 could not be passed yet to the operating system is returned. Zero is returned
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138 if all data could be flushed out.
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139
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140 In case of an I/O error, nil (as first return value) plus an error message (as
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141 second return value) are returned.
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142
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143
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144 ### socket:flush_yield(...)
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145
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146 Alias for socket:flush_call(coroutine.yield, ...)
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147
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148
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149 ### socket.interval
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150
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151 Set to the name of an interval timer if the "connect" handler was called due to
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152 an elapsed interval timer. Otherwise nil.
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153
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154
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155 ### socket.local_ip4
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156
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157 Local IPv4 address used for the connection. Encoded as 4 raw bytes in form of a
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158 string.
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159
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160
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161 ### socket.local_ip6
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162
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163 Local IPv6 address used for the connection. Encoded as 16 raw bytes in form of
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164 a string.
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165
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166
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167 ### socket.local_tcpport
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168
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169 Local TCP port used for the connection.
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170
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171
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172 ### socket:read(maxlen, terminator)
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173
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174 Reads up to maxlen bytes or until an optional termination character is
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175 encountered (which is included in the result). The maxlen value may be nil, in
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176 which case there is no limit on the number of bytes read.
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177
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178 In case of an I/O error, nil (as first return value) plus an error message (as
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179 second return value) are returned.
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180
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181 In all other cases (including EOF), the following two values are returned:
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182
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183 - a string containing the bytes read (first return value, may be empty string)
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184 - a status code equal to "term", "maxlen", or "eof" (second return value)
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185
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186 If an EOF is encountered before all data could be read, then "eof" is returned
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187 as second return value. If maxlen bytes have been read and no termination
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188 character has been read, then "maxlen" is returned as second return value. If
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189 the termination character is the last character of the read string, the second
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190 return value will be "term".
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191
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192
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193 ### socket:read_call(waitfunc, maxlen, terminator)
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194
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195 Same as socket:read(maxlen, terminator), but calls waitfunc() (in an infinite
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196 loop) as long as the reading is blocked.
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197
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198
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199 ### socket:read_nb(maxlen, terminator)
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200
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201 Same as socket:read(maxlen, terminator), but does not block.
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202
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203 In case of an I/O error, nil (as first return value) plus an error message (as
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204 second return value) are returned.
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205
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206 In all other cases (including EOF), the following two values are returned:
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207
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208 - a string containing the bytes read (first return value, may be empty string)
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209 - a status code equal to "term", "maxlen", "eof", "block" (second return value)
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210
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211 The status code "block" as second return value is used if the function returned
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212 prematurely because it would block otherwise. In this case, the first return
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213 value is a string that contains the bytes that could be read without blocking.
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214
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215
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216 ### socket:read_yield(maxlen, terminator)
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217
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218 Alias for socket:read_call(coroutine.yield, maxlen, terminator)
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219
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220
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221 ### socket.remote_ip4
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222
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223 Remote IPv4 address used for the connection. Encoded as 4 raw bytes in form of
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224 a string.
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225
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226
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227 ### socket.remote_ip6
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228
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229 Remote IPv6 address used for the connection. Encoded as 16 raw bytes in form of
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230 a string.
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231
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232
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233 ### socket.remote_tcpport
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234
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235 Remote TCP port used for the connection.
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236
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237
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jbe@91
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238 ### socket:reset()
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239
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240 Alias for socket:close(). Closes the socket connection by sending a TCP RST
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241 packet if possible to indicate error condition. This is the default operation
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242 when a socket handle gets garbage collected or the process is terminated
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243 abnormally.
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244
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245 Returns true on success, or nil (as first return value) plus error message (as
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246 second return value) in case of an I/O error. Using this method on sockets that
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247 have already been closed (or reset) will throw an error.
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248
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249 Warning: Previously sent (and flushed) data may be lost during transmission.
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250
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251
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252 ### socket:write(...)
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253
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254 Takes a variable number of strings and sends them to the peer. The operation is
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255 buffered, so to actually send out the data, it is necessary to eventually call
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256 socket:flush(), socket:finish(), or socket:close().
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257
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258 In case of an I/O error, nil (as first return value) plus an error message (as
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259 second return value) are returned. On success, the socket userdata object is
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260 returned.
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261
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262
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jbe@145
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263 ### socket:write_call(waitfunc, ...)
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264
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265 Same as socket:write(...), but calls waitfunc() (in an infinite loop) as long
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266 as the writing is blocked.
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267
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268
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jbe@91
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269 ### socket:write_nb(...)
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270
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jbe@91
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271 Takes a variable number of strings and sends them to the peer. The operation is
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272 buffered, so to actually send out the data, it is necessary to eventually call
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273 socket:flush_nb(), socket:flush(), socket:finish(), or socket:close().
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274
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275 This function always returns immediately (i.e. it does not block). If all data
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276 (but a small buffered portion) could be sent out, then zero is returned.
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277 Otherwise, all arguments that could not be sent are stored in a buffer of
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278 unlimited size (up to memory capabilities) and an integer is returned that
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279 indicates the number of bytes currently in the buffer.
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280
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281 In case of an I/O error, nil (as first return value) plus an error message (as
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282 second return value) are returned.
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283
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284
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jbe@145
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285 ### socket:write_yield(...)
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286
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jbe@145
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287 Alias for socket:write_call(coroutine.yield, ...)
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288
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289
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290
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jbe@98
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291 I/O library
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jbe@98
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292 -----------
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293
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294 The Moonbridge Network Server for Lua Applications comes with its own I/O
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295 library to support blocking as well as nonblocking I/O operations.
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296
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jbe@114
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297 All methods on an I/O handle (e.g. socket) are described in the previous
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298 section regarding the "socket" object. All other functions of the library are
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299 listed below.
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300
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301
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jbe@205
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302 ### moonbridge_io.exec(command, arg1, arg2, ...)
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303
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jbe@205
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304 Executes the given command and returns a handle with three sockets named
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305 "stdin", "stdout", and "stderr" as well as the following methods:
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306
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jbe@205
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307 - :kill(signal)
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jbe@205
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308 - :wait()
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jbe@205
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309 - :wait_nb()
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310 - :wait_call(waitfunc)
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311 - :wait_yield()
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312
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313 Use :kill(signal) to terminate the process with the given signal (defaults to
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314 15 for SIGTERM).
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315
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316 The :wait() method will wait for the process to terminate and return its exit
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jbe@205
|
317 code. If the process was terminated by a signal, a negative integer is returned
|
|
jbe@205
|
318 which corresponds to the respective positive signal number.
|
|
jbe@205
|
319
|
|
jbe@205
|
320 The method :wait_nb() is the same as :wait(), except that it does not block but
|
|
jbe@219
|
321 returns false (plus a notice as second return value) if the child process has
|
|
jbe@219
|
322 not terminated yet.
|
|
jbe@205
|
323
|
|
jbe@205
|
324 The method :wait_call() is the same as :wait() but calls waitfunc() (in an
|
|
jbe@205
|
325 infinite loop) as long as the process is still running.
|
|
jbe@205
|
326
|
|
jbe@205
|
327 The method :wait_yield() is an alias for :wait_call(coroutine.yield).
|
|
jbe@205
|
328
|
|
jbe@233
|
329 moonbridge_io.exec(...) returns nil (as first return value) plus an error
|
|
jbe@233
|
330 message (as second return value) in case of error.
|
|
jbe@233
|
331
|
|
jbe@205
|
332
|
|
jbe@114
|
333 ### moonbridge_io.localconnect(path)
|
|
jbe@114
|
334
|
|
jbe@114
|
335 Tries to connect to a local socket (also known as Unix Domain Socket). Returns
|
|
jbe@114
|
336 a socket object on success, or nil (as first return value) plus an error
|
|
jbe@114
|
337 message (as second return value) in case of error.
|
|
jbe@114
|
338
|
|
jbe@114
|
339
|
|
jbe@114
|
340 ### moonbridge_io.localconnect_nb(path)
|
|
jbe@114
|
341
|
|
jbe@114
|
342 Tries to connect to a local socket (also known as Unix Domain Socket). Returns
|
|
jbe@114
|
343 a socket object on success, or nil (as first return value) plus an error
|
|
jbe@114
|
344 message (as second return value) in case of error.
|
|
jbe@114
|
345
|
|
jbe@114
|
346 Same as moonbridge_io.localconnect(path), except that this function does not
|
|
jbe@114
|
347 block and immediately returns a socket object.
|
|
jbe@114
|
348
|
|
jbe@114
|
349 In case of an I/O error, nil (as first return value) plus an error message (as
|
|
jbe@114
|
350 second return value) may be returned. However, connection errors may also be
|
|
jbe@114
|
351 reported on first read or write on the socket.
|
|
jbe@114
|
352
|
|
jbe@114
|
353
|
|
jbe@114
|
354 ### moonbridge_io.locallisten(path)
|
|
jbe@114
|
355
|
|
jbe@114
|
356 Attempts to create a local socket (also known as Unix Domain Socket) to accept
|
|
jbe@118
|
357 incoming connections. If the file does already exist and is a socket, then it
|
|
jbe@118
|
358 is deleted automatically before being re-created.
|
|
jbe@114
|
359
|
|
jbe@114
|
360 In case of an I/O error, nil (as first return value) plus an error message (as
|
|
jbe@220
|
361 second return value) may be returned. On success, a listener object is returned
|
|
jbe@114
|
362 which supports the methods :accept(), :accept_nb(), and :close().
|
|
jbe@114
|
363
|
|
jbe@220
|
364 The method :accept() blocks until a new incoming connection is available, in
|
|
jbe@114
|
365 which case a socket object is returned.
|
|
jbe@114
|
366
|
|
jbe@114
|
367 The method :accept_nb() works like :accept(), except that the call is
|
|
jbe@114
|
368 nonblocking and returns false (plus a notice as second return value) in case no
|
|
jbe@114
|
369 incoming connection is available. It is possible to wait for an incoming
|
|
jbe@114
|
370 connection by including the listener object in the input_set of the
|
|
jbe@114
|
371 moonbridge_io.poll(...) call.
|
|
jbe@114
|
372
|
|
jbe@114
|
373 The method :close() will close the listening socket. In case of local sockets
|
|
jbe@114
|
374 (Unix Domain Sockets), the socket will not be unlinked in the file system.
|
|
jbe@114
|
375
|
|
jbe@114
|
376 I/O errors by the methods of the listener object are also reported by returning
|
|
jbe@114
|
377 nil (as first return value) plus an error message (as second return value).
|
|
jbe@114
|
378
|
|
jbe@98
|
379
|
|
jbe@106
|
380 ### moonbridge_io.poll(input_set, output_set, timeout)
|
|
jbe@106
|
381
|
|
jbe@106
|
382 This function waits for at least one of the given file descriptors and/or
|
|
jbe@106
|
383 I/O handles to be ready for input or output. The two sets of file descriptors
|
|
jbe@106
|
384 and/or handles must contain the file descriptor or handle as a key, and a value
|
|
jbe@220
|
385 which does evaluate to true, e.g. input_set = {[socketA] = true}. If a set is
|
|
jbe@220
|
386 nil, it is treated as being empty.
|
|
jbe@106
|
387
|
|
jbe@106
|
388 Returns true when at least one file descriptor or handle is ready for reading
|
|
jbe@266
|
389 or writing respectively, or if a signal has been received during waiting.
|
|
jbe@266
|
390 Returns false (plus a notice as second return value) in case of timeout.
|
|
jbe@266
|
391
|
|
jbe@266
|
392
|
|
jbe@270
|
393 ### moonbridge_io.signals
|
|
jbe@270
|
394
|
|
jbe@270
|
395 A table mapping a string (e.g. "TERM" or "KILL") to the corresponding signal
|
|
jbe@270
|
396 number (e.g. 9 or 15, respectively).
|
|
jbe@270
|
397
|
|
jbe@270
|
398
|
|
jbe@267
|
399 ### moonbridge_io.signalsocket(signal1, signal2, ...)
|
|
jbe@266
|
400
|
|
jbe@266
|
401 This function installs a signal handler for the signals with the numbers passed
|
|
jbe@266
|
402 as arguments and returns a socket which receives a byte for each received
|
|
jbe@266
|
403 signal.
|
|
jbe@266
|
404
|
|
jbe@266
|
405 Subsequent calls of this function can extend the set of signals but will always
|
|
jbe@266
|
406 return the same socket. If the socket is closed, it is no longer possible to
|
|
jbe@266
|
407 detect signals until the process is terminated.
|
|
jbe@106
|
408
|
|
jbe@106
|
409
|
|
jbe@98
|
410 ### moonbridge_io.tcpconnect(hostname, port)
|
|
jbe@98
|
411
|
|
jbe@98
|
412 Tries to open a TCP connection with the given host and TCP port number. Returns
|
|
jbe@114
|
413 a socket object on success, or nil (as first return value) plus an error
|
|
jbe@114
|
414 message (as second return value) in case of error.
|
|
jbe@98
|
415
|
|
jbe@98
|
416
|
|
jbe@99
|
417 ### moonbridge_io.tcpconnect_nb(hostname, port)
|
|
jbe@99
|
418
|
|
jbe@99
|
419 Same as moonbridge_io.tcpconnect(hostname, port), except that this function
|
|
jbe@99
|
420 does not block and immediately returns a socket object.
|
|
jbe@99
|
421
|
|
jbe@102
|
422 Note: The current implementation still blocks during the DNS lookup. Use a
|
|
jbe@102
|
423 numeric IP address as hostname to be truly nonblocking.
|
|
jbe@102
|
424
|
|
jbe@99
|
425 In case of an I/O error, nil (as first return value) plus an error message (as
|
|
jbe@114
|
426 second return value) may be returned. However, connection errors may also be
|
|
jbe@99
|
427 reported on first read or write on the socket.
|
|
jbe@99
|
428
|
|
jbe@99
|
429
|
|
jbe@114
|
430 ### moonbridge_io.tcplisten(hostname, port)
|
|
jbe@114
|
431
|
|
jbe@114
|
432 Attempts to open a TCP port for listening. To listen on the loopback interface,
|
|
jbe@114
|
433 use "::1" as hostname if IPv6 shall be used, or use "127.0.0.1" as hostname if
|
|
jbe@114
|
434 IPv4 shall be used. To listen on all available interfaces, use "::" (IPv6) or
|
|
jbe@114
|
435 "0.0.0.0" (IPv4) respectively.
|
|
jbe@114
|
436
|
|
jbe@114
|
437 In case of an I/O error, nil (as first return value) plus an error message (as
|
|
jbe@114
|
438 second return value) may be returned. On success, a listener object is returned
|
|
jbe@114
|
439 which supports the methods :accept(), :accept_nb(), and :close(). See reference
|
|
jbe@114
|
440 for moonbridge.io_locallisten(...).
|
|
jbe@114
|
441
|
|
jbe@114
|
442
|
|
jbe@235
|
443 ### moonbridge_io.timeref(previous)
|
|
jbe@235
|
444
|
|
jbe@235
|
445 Helper function which returns a time reference (in SI-seconds). If a value is
|
|
jbe@235
|
446 passed as an optional argument to the function, then that value is substracted
|
|
jbe@235
|
447 from the result. A common idiom is:
|
|
jbe@235
|
448
|
|
jbe@235
|
449 local starttime = moonbridge_io.timeref()
|
|
jbe@235
|
450 [...]
|
|
jbe@235
|
451 while true do
|
|
jbe@235
|
452 [...]
|
|
jbe@235
|
453 if not moonbridge_io.poll(
|
|
jbe@235
|
454 input_set,
|
|
jbe@235
|
455 output_set,
|
|
jbe@235
|
456 timeout - moonbridge_io.timeref(starttime)
|
|
jbe@235
|
457 ) then
|
|
jbe@235
|
458 error("Timeout or signal received!")
|
|
jbe@235
|
459 end
|
|
jbe@235
|
460 [...]
|
|
jbe@235
|
461 end
|
|
jbe@235
|
462
|
|
jbe@235
|
463
|
|
jbe@98
|
464
|
|
jbe@0
|
465 HTTP module
|
|
jbe@0
|
466 -----------
|
|
jbe@0
|
467
|
|
jbe@220
|
468 The HTTP module exports the function moonbridge_http.generate_handler(callback)
|
|
jbe@224
|
469 that converts an HTTP handler to a "connect" handler. See file "helloworld.lua"
|
|
jbe@224
|
470 for a simple example or "example_application.lua" for a more complex example of
|
|
jbe@224
|
471 invocation. A table with options may be passed either as a second argument, or
|
|
jbe@224
|
472 as a first argument preceeding the callback function (whichever is more
|
|
jbe@224
|
473 convenient).
|
|
jbe@0
|
474
|
|
jbe@0
|
475 The following options are supported:
|
|
jbe@0
|
476
|
|
jbe@0
|
477 - request_body_size_limit: maximum size of payload of HTTP request body
|
|
jbe@0
|
478 (transfer encoding is allowed to add a limited amount of extra data)
|
|
jbe@0
|
479 - chunk_size: optional default value for maximum_input_chunk_size and
|
|
jbe@0
|
480 minimum_output_chunk_size
|
|
jbe@0
|
481 - request_header_size_limit: maximum size of HTTP request headers
|
|
jbe@0
|
482 - maximum_input_chunk_size: maximum chunk size when streaming a request body or
|
|
jbe@0
|
483 certain POST fields (bigger chunks will be fragmented automatically)
|
|
jbe@0
|
484 - minimum_output_chunk_size: minimum size for a chunk when sending a response
|
|
jbe@0
|
485 body (smaller chunks will be buffered and concatenated with future data;
|
|
jbe@0
|
486 ignored when request:flush() is called)
|
|
jbe@0
|
487 - static_headers: a set of headers to be included in every HTTP response
|
|
jbe@0
|
488 (may be a string, a table or strings, or a table of key-value pairs)
|
|
jbe@0
|
489
|
|
jbe@0
|
490 The callback function receives a single request object as argument, which is
|
|
jbe@0
|
491 described below.
|
|
jbe@0
|
492
|
|
jbe@0
|
493
|
|
jbe@0
|
494 ### request.body
|
|
jbe@0
|
495
|
|
jbe@0
|
496 The request body (without headers) as a string. Accessing this value makes
|
|
jbe@0
|
497 further access to request.post_params and request.post_params_list, or
|
|
jbe@0
|
498 invocation of request:stream_request_body(...) impossible.
|
|
jbe@0
|
499
|
|
jbe@0
|
500
|
|
jbe@60
|
501 ### request:close_after_finish()
|
|
jbe@60
|
502
|
|
jbe@60
|
503 Closes the connection after answering the request.
|
|
jbe@60
|
504
|
|
jbe@60
|
505 This method can only be called before the HTTP response header section has been
|
|
jbe@60
|
506 finished (i.e. before request:finish_headers(), request:send_data(...), or
|
|
jbe@60
|
507 request:finish() were called), but it may be called before a status code has
|
|
jbe@60
|
508 been sent using request:send_status(...).
|
|
jbe@60
|
509
|
|
jbe@60
|
510 A corresponding "Connection: close" header is automatically sent.
|
|
jbe@60
|
511
|
|
jbe@184
|
512 See also request:monologue().
|
|
jbe@184
|
513
|
|
jbe@184
|
514
|
|
jbe@184
|
515 ### request:consume_input()
|
|
jbe@184
|
516
|
|
jbe@184
|
517 Starts processing the request body (if existent) to set the values
|
|
jbe@184
|
518 request.post_params, request.post_params_list, request.post_metadata, and
|
|
jbe@184
|
519 and request.post_metadata_list and/or to call POST field stream handlers that
|
|
jbe@184
|
520 have been previously registered with request:stream_post_param(...) or
|
|
jbe@184
|
521 request:stream_post_params(...), or to call a previously registered request
|
|
jbe@184
|
522 body stream handler that was set with request:set_request_body_streamer().
|
|
jbe@184
|
523
|
|
jbe@184
|
524 This method gets invoked automatically when the POST param tables
|
|
jbe@184
|
525 (request.post_params, etc.) are accessed or if request.body is accessed.
|
|
jbe@184
|
526
|
|
jbe@60
|
527
|
|
jbe@0
|
528 ### request.cookies
|
|
jbe@0
|
529
|
|
jbe@0
|
530 A table with all cookies sent by the client.
|
|
jbe@0
|
531
|
|
jbe@0
|
532
|
|
jbe@50
|
533 ### request.faulty
|
|
jbe@50
|
534
|
|
jbe@184
|
535 Normally set to false. In case of a write error on the client connection or
|
|
jbe@184
|
536 certain other unexpected errors, this value is set to true before a Lua error
|
|
jbe@184
|
537 is raised.
|
|
jbe@50
|
538
|
|
jbe@50
|
539 A faulty request handle must not be used, or another Lua error will be raised.
|
|
jbe@50
|
540
|
|
jbe@50
|
541
|
|
jbe@0
|
542 ### request:finish()
|
|
jbe@0
|
543
|
|
jbe@224
|
544 Finishes and flushes a HTTP response. An HTTP status, all headers, and the
|
|
jbe@224
|
545 response body (if applicable) must have been previously sent. May be called
|
|
jbe@224
|
546 multiple times (performs no operation if called on a finished request handle).
|
|
jbe@224
|
547 Gets automatically invoked when the callback handler returns. After calling
|
|
jbe@224
|
548 this method explicitly, no further data may be written.
|
|
jbe@0
|
549
|
|
jbe@0
|
550
|
|
jbe@0
|
551 ### request:finish_headers()
|
|
jbe@0
|
552
|
|
jbe@0
|
553 Finishes and flushes the HTTP response header section. May be called multiple
|
|
jbe@0
|
554 times, as long as the request is not finished completely. This method is
|
|
jbe@0
|
555 automatically invoked if the application is beginning to send a response body.
|
|
jbe@0
|
556 After calling this method, no further headers may be sent.
|
|
jbe@0
|
557
|
|
jbe@0
|
558
|
|
jbe@0
|
559 ### request:flush()
|
|
jbe@0
|
560
|
|
jbe@0
|
561 Flushes any pending output data. Note: In order to mark the end of a response
|
|
jbe@0
|
562 body, it is required to call request:finish().
|
|
jbe@0
|
563
|
|
jbe@0
|
564
|
|
jbe@184
|
565 ### request.fresh
|
|
jbe@184
|
566
|
|
jbe@184
|
567 Set to false whenever the request object has been used (e.g. data has been read
|
|
jbe@184
|
568 or sent out, or a stream handler was installed); true otherwise.
|
|
jbe@184
|
569
|
|
jbe@184
|
570
|
|
jbe@0
|
571 ### request.get_params
|
|
jbe@0
|
572
|
|
jbe@0
|
573 A table that maps field names to their corresponding GET value. If there are
|
|
jbe@0
|
574 several GET values with the given field name, then the first value is used.
|
|
jbe@0
|
575
|
|
jbe@35
|
576 Note: May be implemented through metamethods, but does support iteration
|
|
jbe@35
|
577 through pairs(...).
|
|
jbe@35
|
578
|
|
jbe@0
|
579
|
|
jbe@0
|
580 ### request.get_params_list
|
|
jbe@0
|
581
|
|
jbe@0
|
582 A table that maps field names to a sequence of their corresponding GET values.
|
|
jbe@0
|
583
|
|
jbe@35
|
584 Note: May be implemented through metamethods, but does support iteration
|
|
jbe@35
|
585 through pairs(...).
|
|
jbe@35
|
586
|
|
jbe@0
|
587
|
|
jbe@0
|
588 ### request.headers
|
|
jbe@0
|
589
|
|
jbe@0
|
590 A table that maps (case-insensitively) a HTTP header field name to a sequence
|
|
jbe@224
|
591 of values. For each occurrence of the respective header line, a string entry is
|
|
jbe@224
|
592 created in that sequence. Non-existent headers are mapped to an empty table.
|
|
jbe@0
|
593
|
|
jbe@0
|
594
|
|
jbe@0
|
595 ### request.headers_csv_string
|
|
jbe@0
|
596
|
|
jbe@0
|
597 A table that maps (case-insensitively) a HTTP header field name to a comma
|
|
jbe@0
|
598 separated string. Multiple occurrences of the header with the given field name
|
|
jbe@0
|
599 are automatically merged into the comma separated string.
|
|
jbe@0
|
600
|
|
jbe@0
|
601
|
|
jbe@0
|
602 ### request.headers_csv_table
|
|
jbe@0
|
603
|
|
jbe@0
|
604 A table that maps (case-insensitively) a HTTP header field name to a sequence
|
|
jbe@224
|
605 of values. One entry is created in that sequence for every comma separated
|
|
jbe@224
|
606 value of each header with the given field name.
|
|
jbe@0
|
607
|
|
jbe@0
|
608
|
|
jbe@0
|
609 ### request.headers_flags
|
|
jbe@0
|
610
|
|
jbe@0
|
611 A table that maps (case-insensitively) a HTTP header field name to another
|
|
jbe@0
|
612 table which (again case-insensitively) maps a string to a boolean, depending on
|
|
jbe@0
|
613 whether this string occurred in the list of comma separated values of one
|
|
jbe@0
|
614 header line with the given field name that was the key in the first table.
|
|
jbe@0
|
615
|
|
jbe@0
|
616
|
|
jbe@0
|
617 ### request.headers_value
|
|
jbe@0
|
618
|
|
jbe@0
|
619 A table that maps (case-insensitively) a HTTP header field name to a value. If
|
|
jbe@0
|
620 multiple header lines with the given field name have been received, false is
|
|
jbe@0
|
621 used as value.
|
|
jbe@0
|
622
|
|
jbe@0
|
623
|
|
jbe@0
|
624 ### request.method
|
|
jbe@0
|
625
|
|
jbe@0
|
626 The HTTP request method, e.g. "HEAD", "GET", or "POST".
|
|
jbe@0
|
627
|
|
jbe@0
|
628
|
|
jbe@184
|
629 ### request:monologue()
|
|
jbe@184
|
630
|
|
jbe@184
|
631 Same as request:close_after_finish() but additionally discards all input data
|
|
jbe@184
|
632 immediately.
|
|
jbe@184
|
633
|
|
jbe@184
|
634
|
|
jbe@0
|
635 ### request.path
|
|
jbe@0
|
636
|
|
jbe@10
|
637 The requested path without a leading slash and without the query part (e.g.
|
|
jbe@10
|
638 "index.html" if "/index.html?a=b&c=d" has been requested). For the query part,
|
|
jbe@10
|
639 see request.query.
|
|
jbe@10
|
640
|
|
jbe@10
|
641 This value will be nil if (and only if) the request method is "OPTIONS" with a
|
|
jbe@10
|
642 request target equal to "*" (see also asterisk-form of request-target in
|
|
jbe@10
|
643 section 5.3.4 in RFC 7230).
|
|
jbe@0
|
644
|
|
jbe@0
|
645
|
|
jbe@0
|
646 ### request.post_metadata
|
|
jbe@0
|
647
|
|
jbe@0
|
648 Only set for multipart/form-data POST requests. A table that maps field names
|
|
jbe@0
|
649 to their corresponding POST metadata table which contains two entries:
|
|
jbe@0
|
650 "file_name" and "content_type". If there are several POST values with the given
|
|
jbe@0
|
651 field name, then the first value/file is used.
|
|
jbe@0
|
652
|
|
jbe@224
|
653 Note: May be implemented through metamethods, but does support iteration
|
|
jbe@224
|
654 through pairs(...).
|
|
jbe@224
|
655
|
|
jbe@0
|
656
|
|
jbe@0
|
657 ### request.post_metadata_list
|
|
jbe@0
|
658
|
|
jbe@0
|
659 Only set for multipart/form-data POST requests. A table that maps field names
|
|
jbe@0
|
660 to a sequence with their corresponding POST metadata tables. Needed if multiple
|
|
jbe@0
|
661 files are uploaded with the same field name.
|
|
jbe@0
|
662
|
|
jbe@224
|
663 Note: May be implemented through metamethods, but does support iteration
|
|
jbe@224
|
664 through pairs(...).
|
|
jbe@224
|
665
|
|
jbe@0
|
666
|
|
jbe@0
|
667 ### request.post_params
|
|
jbe@0
|
668
|
|
jbe@0
|
669 A table that maps field names to their corresponding POST value. If there are
|
|
jbe@0
|
670 several POST values with the given field name, then the first value is used.
|
|
jbe@0
|
671
|
|
jbe@35
|
672 Note: May be implemented through metamethods, but does support iteration
|
|
jbe@35
|
673 through pairs(...).
|
|
jbe@35
|
674
|
|
jbe@0
|
675
|
|
jbe@0
|
676 ### request.post_params_list
|
|
jbe@0
|
677
|
|
jbe@0
|
678 A table that maps field names to a sequence of their corresponding POST values.
|
|
jbe@0
|
679
|
|
jbe@35
|
680 Note: May be implemented through metamethods, but does support iteration
|
|
jbe@35
|
681 through pairs(...).
|
|
jbe@35
|
682
|
|
jbe@0
|
683
|
|
jbe@0
|
684 ### request.query
|
|
jbe@0
|
685
|
|
jbe@12
|
686 Query part of the request target including the leading question mark, e.g.
|
|
jbe@12
|
687 "?a=b&c=d" if the requested target is "/index.html?a=b&c=d". The data is
|
|
jbe@10
|
688 automatically parsed and made available through request.get_params and
|
|
jbe@10
|
689 request.get_params_list.
|
|
jbe@10
|
690
|
|
jbe@10
|
691 If there is no query part given in the request target, then this string is
|
|
jbe@10
|
692 the empty string. This value will be nil if (and only if) the request method
|
|
jbe@10
|
693 is "OPTIONS" with a request target equal to "*" (see also asterisk-form of
|
|
jbe@10
|
694 request-target in section 5.3.4 in RFC 7230).
|
|
jbe@0
|
695
|
|
jbe@0
|
696
|
|
jbe@0
|
697 ### request:send_data(...)
|
|
jbe@0
|
698
|
|
jbe@0
|
699 Sends data as response body. All arguments are converted via tostring(...) and
|
|
jbe@0
|
700 concatenated. May be called multiple times until the request has been finished
|
|
jbe@0
|
701 by calling request:finish().
|
|
jbe@0
|
702
|
|
jbe@0
|
703 If the request method (see request.method) is "HEAD", then calls to
|
|
jbe@0
|
704 request:send_data(...) are automatically ignored.
|
|
jbe@0
|
705
|
|
jbe@0
|
706
|
|
jbe@0
|
707 ### request:send_header(key, value)
|
|
jbe@0
|
708
|
|
jbe@0
|
709 Sends a HTTP response header that consists of the given key and the given
|
|
jbe@0
|
710 value. Note: Key and value must be provided as separate arguments. Before any
|
|
jbe@0
|
711 headers can be sent, a HTTP status must have been set with
|
|
jbe@0
|
712 request:send_status(status_string).
|
|
jbe@0
|
713
|
|
jbe@0
|
714
|
|
jbe@0
|
715 ### request:send_status(status_string)
|
|
jbe@0
|
716
|
|
jbe@0
|
717 Sends a HTTP response status that is given as a string consisting of a 3-digit
|
|
jbe@0
|
718 number and an explanatory string, e.g. "200 OK" or "404 Not Found". This
|
|
jbe@0
|
719 function must be called once before any headers or response body data may be
|
|
jbe@0
|
720 sent.
|
|
jbe@0
|
721
|
|
jbe@0
|
722
|
|
jbe@0
|
723 ### request.socket
|
|
jbe@0
|
724
|
|
jbe@0
|
725 The underlaying socket. Can be used to force a TCP RST, etc.
|
|
jbe@0
|
726
|
|
jbe@0
|
727
|
|
jbe@0
|
728 ### request:stream_post_param(field_name, callback)
|
|
jbe@0
|
729
|
|
jbe@0
|
730 Registers a stream handler for the given POST parameter. The callback function
|
|
jbe@0
|
731 will be called in the following manner:
|
|
jbe@0
|
732
|
|
jbe@0
|
733 - For the initial chunk, the first chunk gets passed as first argument while a
|
|
jbe@0
|
734 table with metadata ("field_name" and "content_type") gets passed as second
|
|
jbe@0
|
735 argument. In case of an immediate EOF (i.e. an empty file), the passed
|
|
jbe@0
|
736 chunk is the empty string. In all other cases the chunk has a length greater
|
|
jbe@0
|
737 than zero.
|
|
jbe@0
|
738 - For any remaining chunks, the respective chunk gets passed as first and only
|
|
jbe@0
|
739 argument (no metadata). Here, the chunk has always a length greater than
|
|
jbe@0
|
740 zero.
|
|
jbe@0
|
741 - To indicate the end of the stream, the callback function is called without
|
|
jbe@0
|
742 arguments. This also happens in case of an immediate EOF (see above).
|
|
jbe@0
|
743
|
|
jbe@0
|
744 In case of an immediate EOF (i.e. an empty file), the callback function is thus
|
|
jbe@0
|
745 called as follows:
|
|
jbe@0
|
746
|
|
jbe@0
|
747 - The first time with an empty string as first argument, and with the metadata
|
|
jbe@0
|
748 as second argument.
|
|
jbe@0
|
749 - The second time without any arguments.
|
|
jbe@0
|
750
|
|
jbe@184
|
751 Note that request:consume_input() needs to be called to enforce streaming to
|
|
jbe@184
|
752 finish.
|
|
jbe@184
|
753
|
|
jbe@0
|
754
|
|
jbe@0
|
755 ### request:stream_post_params(pattern, callback)
|
|
jbe@0
|
756
|
|
jbe@0
|
757 Same as request:stream_post_param(...) but providing a string pattern to match
|
|
jbe@0
|
758 multiple field names (e.g. "^file_[0-9]+$").
|
|
jbe@0
|
759
|
|
jbe@0
|
760
|
|
jbe@0
|
761 ### request:stream_request_body(callback)
|
|
jbe@0
|
762
|
|
jbe@184
|
763 Registeres a stream handler for the whole request body. For each chunk of the
|
|
jbe@184
|
764 request body, the callback function is called with the corresponding chunk. End
|
|
jbe@184
|
765 of data is indicated by passing a nil value to the callback functuion.
|
|
jbe@0
|
766
|
|
jbe@184
|
767 Note that request:consume_input() needs to be called to enforce streaming to
|
|
jbe@184
|
768 finish.
|
|
jbe@0
|
769
|
|
jbe@44
|
770
|
|
jbe@184
|
771 ### request:stream_request_body_now(callback)
|
|
jbe@184
|
772
|
|
jbe@184
|
773 Start streaming of request body immediately. On EOF the function returns and
|
|
jbe@184
|
774 the callback function is *not* called with nil as argument.
|
|
jbe@184
|
775
|
|
jbe@184
|
776
|