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net/http/parser.lua @ 4856:3e3e282f20a3
portmanager: Support for per-port SSL certificates
author | Matthew Wild <mwild1@gmail.com> |
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date | Fri, 11 May 2012 21:24:43 +0100 |
parent | 4716:6eeb142a8073 |
child | 4866:d54999db3aa1 |
rev | line source |
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1 |
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2 local tonumber = tonumber; |
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3 local assert = assert; |
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4 |
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5 local function preprocess_path(path) |
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6 if path:sub(1,1) ~= "/" then |
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7 path = "/"..path; |
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8 end |
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9 local level = 0; |
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10 for component in path:gmatch("([^/]+)/") do |
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11 if component == ".." then |
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12 level = level - 1; |
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13 elseif component ~= "." then |
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14 level = level + 1; |
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15 end |
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16 if level < 0 then |
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17 return nil; |
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18 end |
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19 end |
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20 return path; |
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21 end |
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22 |
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23 local httpstream = {}; |
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24 |
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25 function httpstream.new(success_cb, error_cb, parser_type, options_cb) |
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26 local client = true; |
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27 if not parser_type or parser_type == "server" then client = false; else assert(parser_type == "client", "Invalid parser type"); end |
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28 local buf = ""; |
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29 local chunked; |
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30 local state = nil; |
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31 local packet; |
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32 local len; |
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33 local have_body; |
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34 local error; |
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35 return { |
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36 feed = function(self, data) |
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37 if error then return nil, "parse has failed"; end |
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38 if not data then -- EOF |
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39 if state and client and not len then -- reading client body until EOF |
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40 packet.body = buf; |
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41 success_cb(packet); |
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42 elseif buf ~= "" then -- unexpected EOF |
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43 error = true; return error_cb(); |
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44 end |
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45 return; |
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46 end |
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47 buf = buf..data; |
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48 while #buf > 0 do |
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49 if state == nil then -- read request |
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50 local index = buf:find("\r\n\r\n", nil, true); |
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51 if not index then return; end -- not enough data |
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52 local method, path, httpversion, status_code, reason_phrase; |
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53 local first_line; |
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54 local headers = {}; |
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55 for line in buf:sub(1,index+1):gmatch("([^\r\n]+)\r\n") do -- parse request |
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56 if first_line then |
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57 local key, val = line:match("^([^%s:]+): *(.*)$"); |
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58 if not key then error = true; return error_cb("invalid-header-line"); end -- TODO handle multi-line and invalid headers |
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59 key = key:lower(); |
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60 headers[key] = headers[key] and headers[key]..","..val or val; |
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61 else |
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62 first_line = line; |
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63 if client then |
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64 httpversion, status_code, reason_phrase = line:match("^HTTP/(1%.[01]) (%d%d%d) (.*)$"); |
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65 if not status_code then error = true; return error_cb("invalid-status-line"); end |
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66 have_body = not |
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67 ( (options_cb and options_cb().method == "HEAD") |
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68 or (status_code == 204 or status_code == 304 or status_code == 301) |
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69 or (status_code >= 100 and status_code < 200) ); |
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70 chunked = have_body and headers["transfer-encoding"] == "chunked"; |
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71 else |
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72 method, path, httpversion = line:match("^(%w+) (%S+) HTTP/(1%.[01])$"); |
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73 if not method then error = true; return error_cb("invalid-status-line"); end |
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74 end |
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75 end |
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76 end |
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77 len = tonumber(headers["content-length"]); -- TODO check for invalid len |
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78 if client then |
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79 -- FIXME handle '100 Continue' response (by skipping it) |
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80 if not have_body then len = 0; end |
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81 packet = { |
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82 code = status_code; |
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83 httpversion = httpversion; |
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84 headers = headers; |
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85 body = have_body and "" or nil; |
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86 -- COMPAT the properties below are deprecated |
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87 responseversion = httpversion; |
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88 responseheaders = headers; |
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89 }; |
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90 else |
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91 -- path normalization |
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92 if path:match("^https?://") then |
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93 headers.host, path = path:match("^https?://([^/]*)(.*)"); |
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94 end |
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95 path = preprocess_path(path); |
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96 |
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97 len = len or 0; |
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98 packet = { |
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99 method = method; |
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100 path = path; |
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101 httpversion = httpversion; |
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102 headers = headers; |
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103 body = nil; |
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104 }; |
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105 end |
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106 buf = buf:sub(index + 4); |
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107 state = true; |
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108 end |
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109 if state then -- read body |
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110 if client then |
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111 if chunked then |
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112 local index = buf:find("\r\n", nil, true); |
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113 if not index then return; end -- not enough data |
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114 local chunk_size = buf:match("^%x+"); |
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115 if not chunk_size then error = true; return error_cb("invalid-chunk-size"); end |
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116 chunk_size = tonumber(chunk_size, 16); |
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117 index = index + 2; |
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118 if chunk_size == 0 then |
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119 state = nil; success_cb(packet); |
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120 elseif #buf - index + 1 >= chunk_size then -- we have a chunk |
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121 packet.body = packet.body..buf:sub(index, index + chunk_size - 1); |
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122 buf = buf:sub(index + chunk_size); |
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123 end |
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124 error("trailers"); -- FIXME MUST read trailers |
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125 elseif len and #buf >= len then |
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126 packet.body, buf = buf:sub(1, len), buf:sub(len + 1); |
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127 state = nil; success_cb(packet); |
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128 end |
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129 elseif #buf >= len then |
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130 packet.body, buf = buf:sub(1, len), buf:sub(len + 1); |
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131 state = nil; success_cb(packet); |
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132 end |
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133 end |
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134 end |
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135 end; |
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136 }; |
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137 end |
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138 |
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139 return httpstream; |