prosody
e5ec60dfb202
net/http/parser.lua

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net/http/parser.lua @ 4910:e5ec60dfb202

net.http.parser: Break loop when no more usable data in buffer
author Matthew Wild <mwild1@gmail.com>
date Fri, 25 May 2012 02:32:33 +0100
parent 4879:45bb378a4a98
child 5207:c5edb08fc7cb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4631
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
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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 local url_parse = require "socket.url".parse;
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5 local urldecode = require "net.http".urldecode;
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6
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7 local function preprocess_path(path)
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8 path = urldecode(path);
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9 if path:sub(1,1) ~= "/" then
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10 path = "/"..path;
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11 end
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12 local level = 0;
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13 for component in path:gmatch("([^/]+)/") do
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14 if component == ".." then
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15 level = level - 1;
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16 elseif component ~= "." then
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17 level = level + 1;
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18 end
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19 if level < 0 then
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20 return nil;
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21 end
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22 end
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23 return path;
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24 end
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25
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fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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26 local httpstream = {};
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27
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28 function httpstream.new(success_cb, error_cb, parser_type, options_cb)
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29 local client = true;
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30 if not parser_type or parser_type == "server" then client = false; else assert(parser_type == "client", "Invalid parser type"); end
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31 local buf = "";
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32 local chunked;
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33 local state = nil;
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34 local packet;
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35 local len;
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36 local have_body;
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37 local error;
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38 return {
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39 feed = function(self, data)
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40 if error then return nil, "parse has failed"; end
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41 if not data then -- EOF
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42 if state and client and not len then -- reading client body until EOF
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43 packet.body = buf;
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44 success_cb(packet);
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45 elseif buf ~= "" then -- unexpected EOF
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46 error = true; return error_cb();
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47 end
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48 return;
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49 end
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50 buf = buf..data;
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51 while #buf > 0 do
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52 if state == nil then -- read request
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53 local index = buf:find("\r\n\r\n", nil, true);
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54 if not index then return; end -- not enough data
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55 local method, path, httpversion, status_code, reason_phrase;
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56 local first_line;
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57 local headers = {};
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58 for line in buf:sub(1,index+1):gmatch("([^\r\n]+)\r\n") do -- parse request
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59 if first_line then
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60 local key, val = line:match("^([^%s:]+): *(.*)$");
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61 if not key then error = true; return error_cb("invalid-header-line"); end -- TODO handle multi-line and invalid headers
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62 key = key:lower();
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63 headers[key] = headers[key] and headers[key]..","..val or val;
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64 else
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65 first_line = line;
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66 if client then
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67 httpversion, status_code, reason_phrase = line:match("^HTTP/(1%.[01]) (%d%d%d) (.*)$");
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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 chunked = have_body and headers["transfer-encoding"] == "chunked";
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74 else
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75 method, path, httpversion = line:match("^(%w+) (%S+) HTTP/(1%.[01])$");
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76 if not method then error = true; return error_cb("invalid-status-line"); end
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77 end
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78 end
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79 end
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80 len = tonumber(headers["content-length"]); -- TODO check for invalid len
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81 if client then
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82 -- FIXME handle '100 Continue' response (by skipping it)
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83 if not have_body then len = 0; end
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84 packet = {
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85 code = status_code;
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86 httpversion = httpversion;
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87 headers = headers;
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88 body = have_body and "" or nil;
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89 -- COMPAT the properties below are deprecated
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90 responseversion = httpversion;
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91 responseheaders = headers;
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92 };
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93 else
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94 local parsed_url = url_parse(path);
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95 path = preprocess_path(parsed_url.path);
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96 headers.host = parsed_url.host or headers.host;
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97
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98 len = len or 0;
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99 packet = {
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100 method = method;
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101 url = parsed_url;
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102 path = path;
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103 httpversion = httpversion;
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104 headers = headers;
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105 body = nil;
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106 };
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107 end
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108 buf = buf:sub(index + 4);
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109 state = true;
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110 end
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111 if state then -- read body
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112 if client then
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113 if chunked then
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114 local index = buf:find("\r\n", nil, true);
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115 if not index then return; end -- not enough data
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116 local chunk_size = buf:match("^%x+");
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117 if not chunk_size then error = true; return error_cb("invalid-chunk-size"); end
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118 chunk_size = tonumber(chunk_size, 16);
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119 index = index + 2;
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120 if chunk_size == 0 then
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121 state = nil; success_cb(packet);
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122 elseif #buf - index + 1 >= chunk_size then -- we have a chunk
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123 packet.body = packet.body..buf:sub(index, index + chunk_size - 1);
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124 buf = buf:sub(index + chunk_size);
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125 end
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126 error("trailers"); -- FIXME MUST read trailers
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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127 elseif len and #buf >= len then
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128 packet.body, buf = buf:sub(1, len), buf:sub(len + 1);
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129 state = nil; success_cb(packet);
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130 end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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131 elseif #buf >= len then
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132 packet.body, buf = buf:sub(1, len), buf:sub(len + 1);
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133 state = nil; success_cb(packet);
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e5ec60dfb202 net.http.parser: Break loop when no more usable data in buffer
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134 else
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135 break;
4631
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136 end
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137 end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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138 end
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139 end;
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140 };
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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141 end
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142
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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143 return httpstream;