Mon, 12 Jan 2009 04:09:02 +0000
Add mod_actions_http for executing actions through HTTP
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1 | |
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2 | local socket = require "socket" |
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3 | local mime = require "mime" |
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4 | local url = require "socket.url" |
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5 | |
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6 | local server = require "net.server" |
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7 | |
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8 | local connlisteners_get = require "net.connlisteners".get; |
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9 | local listener = connlisteners_get("httpclient") or error("No httpclient listener!"); |
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10 | |
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11 | local t_insert, t_concat = table.insert, table.concat; |
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12 | local tonumber, tostring, pairs, xpcall, select, debug_traceback = |
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13 | tonumber, tostring, pairs, xpcall, select, debug.traceback; |
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14 | |
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15 | local log = require "util.logger".init("http"); |
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16 | local print = function () end |
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17 | |
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18 | local urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end }); |
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Waqas Hussain <waqas20@gmail.com>
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19 | local urlencode = function (s) return s and (s:gsub("%W", function (c) return string.format("%%%02x", c:byte()); end)); end |
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20 | |
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21 | module "http" |
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22 | |
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23 | local function expectbody(reqt, code) |
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24 | if reqt.method == "HEAD" then return nil end |
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25 | if code == 204 or code == 304 then return nil end |
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26 | if code >= 100 and code < 200 then return nil end |
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27 | return 1 |
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28 | end |
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29 | |
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30 | local function request_reader(request, data, startpos) |
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31 | if not data then |
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32 | if request.body then |
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33 | log("debug", "Connection closed, but we have data, calling callback..."); |
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34 | request.callback(t_concat(request.body), request.code, request); |
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35 | elseif request.state ~= "completed" then |
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36 | -- Error.. connection was closed prematurely |
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37 | request.callback("connection-closed", 0, request); |
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38 | end |
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39 | destroy_request(request); |
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40 | return; |
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41 | end |
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42 | if request.state == "body" then |
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43 | print("Reading body...") |
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44 | if not request.body then request.body = {}; request.havebodylength, request.bodylength = 0, tonumber(request.responseheaders["content-length"]); end |
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45 | if startpos then |
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46 | data = data:sub(startpos, -1) |
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47 | end |
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48 | t_insert(request.body, data); |
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49 | if request.bodylength then |
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50 | request.havebodylength = request.havebodylength + #data; |
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51 | if request.havebodylength >= request.bodylength then |
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52 | -- We have the body |
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53 | log("debug", "Have full body, calling callback"); |
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54 | if request.callback then |
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55 | request.callback(t_concat(request.body), request.code, request); |
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56 | end |
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57 | request.body = nil; |
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58 | request.state = "completed"; |
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59 | else |
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60 | print("", "Have "..request.havebodylength.." bytes out of "..request.bodylength); |
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61 | end |
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62 | end |
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63 | elseif request.state == "headers" then |
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64 | print("Reading headers...") |
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65 | local pos = startpos; |
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66 | local headers = request.responseheaders or {}; |
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67 | for line in data:sub(startpos, -1):gmatch("(.-)\r\n") do |
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68 | startpos = startpos + #line + 2; |
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69 | local k, v = line:match("(%S+): (.+)"); |
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70 | if k and v then |
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71 | headers[k:lower()] = v; |
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72 | print("Header: "..k:lower().." = "..v); |
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73 | elseif #line == 0 then |
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74 | request.responseheaders = headers; |
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75 | break; |
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76 | else |
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77 | print("Unhandled header line: "..line); |
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78 | end |
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79 | end |
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80 | -- Reached the end of the headers |
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81 | request.state = "body"; |
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82 | if #data > startpos then |
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83 | return request_reader(request, data, startpos); |
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84 | end |
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85 | elseif request.state == "status" then |
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86 | print("Reading status...") |
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87 | local http, code, text, linelen = data:match("^HTTP/(%S+) (%d+) (.-)\r\n()", startpos); |
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88 | code = tonumber(code); |
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89 | if not code then |
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90 | return request.callback("invalid-status-line", 0, request); |
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91 | end |
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92 | |
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93 | request.code, request.responseversion = code, http; |
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94 | |
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95 | if request.onlystatus or not expectbody(request, code) then |
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96 | if request.callback then |
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97 | request.callback(nil, code, request); |
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98 | end |
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99 | destroy_request(request); |
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100 | return; |
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101 | end |
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102 | |
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103 | request.state = "headers"; |
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104 | |
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105 | if #data > linelen then |
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106 | return request_reader(request, data, linelen); |
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107 | end |
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108 | end |
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109 | end |
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110 | |
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111 | local function handleerr(err) log("error", "Traceback[http]: %s: %s", tostring(err), debug_traceback()); end |
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112 | function request(u, ex, callback) |
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113 | local req = url.parse(u); |
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114 | |
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115 | local custom_headers, body; |
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116 | local default_headers = { ["Host"] = req.host, ["User-Agent"] = "Prosody XMPP Server" } |
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117 | |
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118 | |
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119 | if req.userinfo then |
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120 | default_headers["Authorization"] = "Basic "..mime.b64(req.userinfo); |
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121 | end |
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122 | |
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123 | if ex then |
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124 | custom_headers = ex.custom_headers; |
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125 | req.onlystatus = ex.onlystatus; |
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126 | body = ex.body; |
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127 | if body then |
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128 | req.method = "POST "; |
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129 | default_headers["Content-Length"] = tostring(#body); |
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130 | default_headers["Content-Type"] = "application/x-www-form-urlencoded"; |
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131 | end |
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132 | if ex.method then req.method = ex.method; end |
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133 | end |
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134 | |
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135 | req.handler, req.conn = server.wraptcpclient(listener, socket.tcp(), req.host, req.port or 80, 0, "*a"); |
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136 | req.write = req.handler.write; |
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137 | req.conn:settimeout(0); |
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138 | local ok, err = req.conn:connect(req.host, req.port or 80); |
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139 | if not ok and err ~= "timeout" then |
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140 | return nil, err; |
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141 | end |
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142 | |
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143 | req.write((req.method or "GET ")..req.path.." HTTP/1.0\r\n"); |
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144 | local t = { [2] = ": ", [4] = "\r\n" }; |
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145 | if custom_headers then |
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146 | for k, v in pairs(custom_headers) do |
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147 | t[1], t[3] = k, v; |
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148 | req.write(t_concat(t)); |
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149 | default_headers[k] = nil; |
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150 | end |
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151 | end |
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152 | |
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153 | for k, v in pairs(default_headers) do |
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154 | t[1], t[3] = k, v; |
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155 | req.write(t_concat(t)); |
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156 | default_headers[k] = nil; |
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157 | end |
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158 | req.write("\r\n"); |
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159 | |
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160 | if body then |
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161 | req.write(body); |
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162 | end |
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163 | |
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164 | req.callback = function (content, code, request) log("debug", "Calling callback, code %s content: %s", code or "---", content or "---"); return select(2, xpcall(function () return callback(content, code, request) end, handleerr)); end |
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165 | req.reader = request_reader; |
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166 | req.state = "status"; |
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167 | |
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168 | listener.register_request(req.handler, req); |
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169 | |
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170 | return req; |
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171 | end |
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172 | |
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173 | function destroy_request(request) |
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174 | if request.conn then |
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175 | request.handler.close() |
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176 | listener.disconnect(request.conn, "closed"); |
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177 | end |
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178 | end |
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179 | |
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180 | _M.urlencode = urlencode; |
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181 | |
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182 | return _M; |