prosody
e6fed1d80116
net/http/parser.lua

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net/http/parser.lua @ 5915:e6fed1d80116

Back out 1b0ac7950129, as SSLv3 appears to still be in moderate use on the network. Also, although obsolete, SSLv3 isn't documented to have any weaknesses that TLS 1.0 (the most common version used today) doesn't also have. Get your act together clients!
author Matthew Wild <mwild1@gmail.com>
date Tue, 12 Nov 2013 02:13:01 +0000
parent 5477:50cbea68586f
child 6386:f942cf2a9a03
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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1 local tonumber = tonumber;
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2 local assert = assert;
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d54999db3aa1 net.http.parser: Do full URL decoding and parsing (e.g. adds request.url.query when present)
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3 local url_parse = require "socket.url".parse;
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274c10668fe8 net.http.parser: Depend on util.http instead of net.http for urlencode
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4 local urldecode = require "util.http".urldecode;
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5
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6eeb142a8073 mod_http_files, net.http.parser: Move path normalization to net.http.parser so that all modules can benefit
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6 local function preprocess_path(path)
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61c47d26481d net.http.parser: Fix syntax error introduced in c5edb08fc7cb.
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7 path = urldecode((path:gsub("//+", "/")));
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8 if path:sub(1,1) ~= "/" then
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9 path = "/"..path;
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10 end
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11 local level = 0;
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12 for component in path:gmatch("([^/]+)/") do
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13 if component == ".." then
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14 level = level - 1;
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15 elseif component ~= "." then
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16 level = level + 1;
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17 end
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18 if level < 0 then
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19 return nil;
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20 end
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21 end
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22 return path;
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23 end
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24
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25 local httpstream = {};
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26
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27 function httpstream.new(success_cb, error_cb, parser_type, options_cb)
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28 local client = true;
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29 if not parser_type or parser_type == "server" then client = false; else assert(parser_type == "client", "Invalid parser type"); end
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30 local buf = "";
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31 local chunked, chunk_size, chunk_start;
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32 local state = nil;
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33 local packet;
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34 local len;
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35 local have_body;
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36 local error;
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37 return {
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38 feed = function(self, data)
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39 if error then return nil, "parse has failed"; end
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40 if not data then -- EOF
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41 if state and client and not len then -- reading client body until EOF
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42 packet.body = buf;
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43 success_cb(packet);
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44 elseif buf ~= "" then -- unexpected EOF
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45 error = true; return error_cb();
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46 end
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47 return;
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48 end
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49 buf = buf..data;
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50 while #buf > 0 do
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51 if state == nil then -- read request
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52 local index = buf:find("\r\n\r\n", nil, true);
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53 if not index then return; end -- not enough data
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54 local method, path, httpversion, status_code, reason_phrase;
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55 local first_line;
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56 local headers = {};
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57 for line in buf:sub(1,index+1):gmatch("([^\r\n]+)\r\n") do -- parse request
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58 if first_line then
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59 local key, val = line:match("^([^%s:]+): *(.*)$");
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60 if not key then error = true; return error_cb("invalid-header-line"); end -- TODO handle multi-line and invalid headers
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61 key = key:lower();
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62 headers[key] = headers[key] and headers[key]..","..val or val;
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63 else
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64 first_line = line;
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65 if client then
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66 httpversion, status_code, reason_phrase = line:match("^HTTP/(1%.[01]) (%d%d%d) (.*)$");
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67 status_code = tonumber(status_code);
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68 if not status_code then error = true; return error_cb("invalid-status-line"); end
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69 have_body = not
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70 ( (options_cb and options_cb().method == "HEAD")
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71 or (status_code == 204 or status_code == 304 or status_code == 301)
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72 or (status_code >= 100 and status_code < 200) );
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73 else
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74 method, path, httpversion = line:match("^(%w+) (%S+) HTTP/(1%.[01])$");
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75 if not method then error = true; return error_cb("invalid-status-line"); end
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76 end
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77 end
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78 end
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79 if not first_line then error = true; return error_cb("invalid-status-line"); end
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80 chunked = have_body and headers["transfer-encoding"] == "chunked";
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81 len = tonumber(headers["content-length"]); -- TODO check for invalid len
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82 if client then
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83 -- FIXME handle '100 Continue' response (by skipping it)
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84 if not have_body then len = 0; end
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85 packet = {
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86 code = status_code;
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87 httpversion = httpversion;
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88 headers = headers;
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89 body = have_body and "" or nil;
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90 -- COMPAT the properties below are deprecated
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91 responseversion = httpversion;
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92 responseheaders = headers;
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93 };
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94 else
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95 local parsed_url;
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96 if path:byte() == 47 then -- starts with /
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97 local _path, _query = path:match("([^?]*).?(.*)");
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98 if _query == "" then _query = nil; end
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99 parsed_url = { path = _path, query = _query };
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100 else
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101 parsed_url = url_parse(path);
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102 if not(parsed_url and parsed_url.path) then error = true; return error_cb("invalid-url"); end
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103 end
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104 path = preprocess_path(parsed_url.path);
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105 headers.host = parsed_url.host or headers.host;
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106
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107 len = len or 0;
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108 packet = {
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109 method = method;
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110 url = parsed_url;
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111 path = path;
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112 httpversion = httpversion;
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113 headers = headers;
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114 body = nil;
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115 };
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116 end
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117 buf = buf:sub(index + 4);
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118 state = true;
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119 end
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120 if state then -- read body
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121 if client then
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122 if chunked then
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123 if not buf:find("\r\n", nil, true) then
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124 return;
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125 end -- not enough data
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126 if not chunk_size then
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127 chunk_size, chunk_start = buf:match("^(%x+)[^\r\n]*\r\n()");
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128 chunk_size = chunk_size and tonumber(chunk_size, 16);
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129 if not chunk_size then error = true; return error_cb("invalid-chunk-size"); end
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130 end
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131 if chunk_size == 0 and buf:find("\r\n\r\n", chunk_start-2, true) then
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132 state, chunk_size = nil, nil;
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133 buf = buf:gsub("^.-\r\n\r\n", ""); -- This ensure extensions and trailers are stripped
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134 success_cb(packet);
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135 elseif #buf - chunk_start + 2 >= chunk_size then -- we have a chunk
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136 packet.body = packet.body..buf:sub(chunk_start, chunk_start + (chunk_size-1));
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137 buf = buf:sub(chunk_start + chunk_size + 2);
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138 chunk_size, chunk_start = nil, nil;
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139 else -- Partial chunk remaining
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140 break;
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141 end
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142 elseif len and #buf >= len then
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143 packet.body, buf = buf:sub(1, len), buf:sub(len + 1);
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144 state = nil; success_cb(packet);
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145 else
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146 break;
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147 end
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148 elseif #buf >= len then
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149 packet.body, buf = buf:sub(1, len), buf:sub(len + 1);
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150 state = nil; success_cb(packet);
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151 else
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152 break;
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153 end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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154 end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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155 end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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156 end;
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157 };
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158 end
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159
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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160 return httpstream;