Fri, 17 Dec 2010 01:24:59 +0000
net.httpserver: Default 'ports' = {5280}
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1 | |
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2 | local coroutine = coroutine; |
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3 | local tonumber = tonumber; |
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4 | |
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5 | local deadroutine = coroutine.create(function() end); |
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6 | coroutine.resume(deadroutine); |
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7 | |
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8 | module("httpstream") |
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9 | |
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10 | local function parser(success_cb, parser_type, options_cb) |
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11 | local data = coroutine.yield(); |
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12 | local function readline() |
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13 | local pos = data:find("\r\n", nil, true); |
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14 | while not pos do |
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15 | data = data..coroutine.yield(); |
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16 | pos = data:find("\r\n", nil, true); |
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17 | end |
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18 | local r = data:sub(1, pos-1); |
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19 | data = data:sub(pos+2); |
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20 | return r; |
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21 | end |
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22 | local function readlength(n) |
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23 | while #data < n do |
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24 | data = data..coroutine.yield(); |
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25 | end |
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26 | local r = data:sub(1, n); |
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27 | data = data:sub(n + 1); |
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28 | return r; |
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29 | end |
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30 | local function readheaders() |
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31 | local headers = {}; -- read headers |
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32 | while true do |
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33 | local line = readline(); |
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34 | if line == "" then break; end -- headers done |
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35 | local key, val = line:match("^([^%s:]+): *(.*)$"); |
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36 | if not key then coroutine.yield("invalid-header-line"); end -- TODO handle multi-line and invalid headers |
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37 | key = key:lower(); |
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38 | headers[key] = headers[key] and headers[key]..","..val or val; |
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39 | end |
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40 | return headers; |
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41 | end |
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42 | |
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43 | if not parser_type or parser_type == "server" then |
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44 | while true do |
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45 | -- read status line |
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46 | local status_line = readline(); |
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47 | local method, path, httpversion = status_line:match("^(%S+)%s+(%S+)%s+HTTP/(%S+)$"); |
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48 | if not method then coroutine.yield("invalid-status-line"); end |
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49 | -- TODO parse url |
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50 | local headers = readheaders(); |
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51 | |
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52 | -- read body |
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53 | local len = tonumber(headers["content-length"]); |
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54 | len = len or 0; -- TODO check for invalid len |
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55 | local body = readlength(len); |
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56 | |
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57 | success_cb({ |
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58 | method = method; |
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59 | path = path; |
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60 | httpversion = httpversion; |
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61 | headers = headers; |
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62 | body = body; |
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63 | }); |
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64 | end |
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65 | elseif parser_type == "client" then |
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66 | while true do |
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67 | -- read status line |
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68 | local status_line = readline(); |
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69 | local httpversion, status_code, reason_phrase = status_line:match("^HTTP/(%S+)%s+(%d%d%d)%s+(.*)$"); |
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70 | status_code = tonumber(status_code); |
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71 | if not status_code then coroutine.yield("invalid-status-line"); end |
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72 | local headers = readheaders(); |
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73 | |
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74 | -- read body |
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75 | local have_body = not |
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76 | ( (options_cb and options_cb().method == "HEAD") |
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77 | or (status_code == 204 or status_code == 304 or status_code == 301) |
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78 | or (status_code >= 100 and status_code < 200) ); |
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79 | |
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80 | local body; |
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81 | if have_body then |
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82 | local len = tonumber(headers["content-length"]); |
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83 | if headers["transfer-encoding"] == "chunked" then |
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84 | body = ""; |
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85 | while true do |
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86 | local chunk_size = readline():match("^%x+"); |
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87 | if not chunk_size then coroutine.yield("invalid-chunk-size"); end |
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88 | chunk_size = tonumber(chunk_size, 16) |
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89 | if chunk_size == 0 then break; end |
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90 | body = body..readlength(chunk_size); |
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91 | if readline() ~= "" then coroutine.yield("invalid-chunk-ending"); end |
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92 | end |
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93 | local trailers = readheaders(); |
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94 | elseif len then -- TODO check for invalid len |
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95 | body = readlength(len); |
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96 | else -- read to end |
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97 | repeat |
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98 | local newdata = coroutine.yield(); |
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99 | data = data..newdata; |
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100 | until newdata == ""; |
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101 | body, data = data, ""; |
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102 | end |
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103 | end |
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104 | |
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105 | success_cb({ |
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106 | code = status_code; |
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107 | responseversion = httpversion; |
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108 | responseheaders = headers; |
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109 | body = body; |
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110 | }); |
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111 | end |
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112 | else coroutine.yield("unknown-parser-type"); end |
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113 | end |
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114 | |
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115 | function new(success_cb, error_cb, parser_type, options_cb) |
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116 | local co = coroutine.create(parser); |
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117 | coroutine.resume(co, success_cb, parser_type, options_cb) |
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118 | return { |
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119 | feed = function(self, data) |
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120 | if not data then |
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121 | if parser_type == "client" then coroutine.resume(co, ""); end |
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122 | co = deadroutine; |
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123 | return error_cb(); |
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124 | end |
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125 | local success, result = coroutine.resume(co, data); |
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126 | if result then |
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127 | co = deadroutine; |
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128 | return error_cb(result); |
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129 | end |
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130 | end; |
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131 | }; |
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132 | end |
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133 | |
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134 | return _M; |