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net/http/parser.lua @ 13379:977d92aff563
Merge 0.12->trunk
author | Kim Alvefur <zash@zash.se> |
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date | Fri, 01 Dec 2023 17:11:19 +0100 |
parent | 12974:ba409c67353b |
parent | 13378:db30ffbf2090 |
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1 local tonumber = tonumber; |
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2 local assert = assert; |
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3 local url_parse = require "socket.url".parse; |
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4 local urldecode = require "prosody.util.http".urldecode; |
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5 local dbuffer = require "prosody.util.dbuffer"; |
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6 |
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7 local function preprocess_path(path) |
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8 path = urldecode((path:gsub("//+", "/"))); |
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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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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 bodylimit = tonumber(options_cb and options_cb().body_size_limit) or 10*1024*1024; |
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32 -- https://stackoverflow.com/a/686243 |
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33 -- Individual headers can be up to 16k? What madness? |
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34 local headlimit = tonumber(options_cb and options_cb().head_size_limit) or 10*1024; |
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35 local buflimit = tonumber(options_cb and options_cb().buffer_size_limit) or bodylimit * 2; |
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36 local buffer = dbuffer.new(buflimit); |
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37 local chunked; |
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38 local state = nil; |
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39 local packet; |
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40 local len; |
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41 local have_body; |
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42 local error; |
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43 return { |
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44 feed = function(_, data) |
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45 if error then return nil, "parse has failed"; end |
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46 if not data then -- EOF |
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47 if state and client and not len then -- reading client body until EOF |
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48 buffer:collapse(); |
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49 packet.body = buffer:read_chunk() or ""; |
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50 packet.partial = nil; |
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51 success_cb(packet); |
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52 state = nil; |
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53 elseif buffer:length() ~= 0 then -- unexpected EOF |
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54 error = true; return error_cb("unexpected-eof"); |
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55 end |
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56 return; |
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57 end |
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58 if not buffer:write(data) then error = true; return error_cb("max-buffer-size-exceeded"); end |
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59 while buffer:length() > 0 do |
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60 if state == nil then -- read request |
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61 local index = buffer:sub(1, headlimit):find("\r\n\r\n", nil, true); |
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62 if not index then |
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63 if buffer:length() > headlimit then |
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64 return error_cb("header-too-large"); |
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65 end |
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66 -- not enough data |
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67 return; |
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68 end |
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69 -- FIXME was reason_phrase meant to be passed on somewhere? |
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70 local method, path, httpversion, status_code, reason_phrase; -- luacheck: ignore reason_phrase |
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71 local first_line; |
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72 local headers = {}; |
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73 for line in buffer:read(index+3):gmatch("([^\r\n]+)\r\n") do -- parse request |
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74 if first_line then |
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75 local key, val = line:match("^([^%s:]+): *(.*)$"); |
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76 if not key then error = true; return error_cb("invalid-header-line"); end -- TODO handle multi-line and invalid headers |
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77 key = key:lower(); |
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78 headers[key] = headers[key] and headers[key]..","..val or val; |
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79 else |
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80 first_line = line; |
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81 if client then |
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82 httpversion, status_code, reason_phrase = line:match("^HTTP/(1%.[01]) (%d%d%d) (.*)$"); |
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83 status_code = tonumber(status_code); |
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84 if not status_code then error = true; return error_cb("invalid-status-line"); end |
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85 have_body = not |
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86 ( (options_cb and options_cb().method == "HEAD") |
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87 or (status_code == 204 or status_code == 304 or status_code == 301) |
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88 or (status_code >= 100 and status_code < 200) ); |
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89 else |
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90 method, path, httpversion = line:match("^(%w+) (%S+) HTTP/(1%.[01])$"); |
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91 if not method then error = true; return error_cb("invalid-status-line"); end |
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92 end |
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93 end |
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94 end |
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95 if not first_line then error = true; return error_cb("invalid-status-line"); end |
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96 chunked = have_body and headers["transfer-encoding"] == "chunked"; |
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97 len = tonumber(headers["content-length"]); -- TODO check for invalid len |
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98 if client then |
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99 -- FIXME handle '100 Continue' response (by skipping it) |
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100 if not have_body then len = 0; end |
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101 packet = { |
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102 code = status_code; |
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103 httpversion = httpversion; |
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104 headers = headers; |
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105 body = false; |
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106 body_length = len; |
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107 chunked = chunked; |
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108 partial = true; |
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109 -- COMPAT the properties below are deprecated |
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110 responseversion = httpversion; |
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111 responseheaders = headers; |
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112 }; |
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113 else |
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114 local parsed_url; |
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115 if path:byte() == 47 then -- starts with / |
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116 local _path, _query = path:match("([^?]*).?(.*)"); |
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117 if _query == "" then _query = nil; end |
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118 parsed_url = { path = _path, query = _query }; |
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119 else |
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120 parsed_url = url_parse(path); |
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121 if not(parsed_url and parsed_url.path) then error = true; return error_cb("invalid-url"); end |
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122 end |
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123 path = preprocess_path(parsed_url.path); |
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124 headers.host = parsed_url.host or headers.host; |
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125 |
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126 len = len or 0; |
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127 packet = { |
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128 method = method; |
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129 url = parsed_url; |
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130 path = path; |
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131 httpversion = httpversion; |
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132 headers = headers; |
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133 body = false; |
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134 body_sink = nil; |
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135 chunked = chunked; |
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136 partial = true; |
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137 }; |
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138 end |
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139 if not len or len > bodylimit then |
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140 -- Early notification, for redirection |
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141 success_cb(packet); |
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142 if not packet.body_sink and (len and len > bodylimit) then |
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143 error = true; |
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144 return error_cb("content-length-limit-exceeded"); |
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145 end |
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146 end |
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147 if chunked and not packet.body_sink then |
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148 success_cb(packet); |
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149 if not packet.body_sink then |
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150 packet.body_buffer = dbuffer.new(buflimit); |
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151 end |
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152 end |
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153 state = true; |
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154 end |
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155 if state then -- read body |
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156 if chunked then |
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157 local chunk_header = buffer:sub(1, 512); -- XXX How large do chunk headers grow? |
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158 local chunk_size, chunk_start = chunk_header:match("^(%x+)[^\r\n]*\r\n()"); |
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159 if not chunk_size then return; end |
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160 chunk_size = chunk_size and tonumber(chunk_size, 16); |
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161 if not chunk_size then error = true; return error_cb("invalid-chunk-size"); end |
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162 |
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163 if chunk_size == 0 and chunk_header:find("\r\n\r\n", chunk_start-2, true) then |
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164 local body_buffer = packet.body_buffer; |
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165 if body_buffer then |
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166 packet.body_buffer = nil; |
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167 body_buffer:collapse(); |
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168 packet.body = body_buffer:read_chunk() or ""; |
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169 end |
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170 |
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171 buffer:collapse(); |
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172 local buf = buffer:read_chunk(); |
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173 buf = buf:gsub("^.-\r\n\r\n", ""); -- This ensure extensions and trailers are stripped |
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174 buffer:write(buf); |
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175 state, chunked = nil, nil; |
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176 packet.partial = nil; |
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177 success_cb(packet); |
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178 elseif buffer:length() - chunk_start - 1 >= chunk_size then -- we have a chunk |
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179 buffer:discard(chunk_start - 1); |
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180 (packet.body_sink or packet.body_buffer):write(buffer:read(chunk_size)); |
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181 buffer:discard(2); -- CRLF |
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182 else -- Partial chunk remaining |
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183 break; |
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184 end |
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185 elseif packet.body_sink then |
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186 local chunk = buffer:read_chunk(len); |
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187 while chunk and (not len or len > 0) do |
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188 if packet.body_sink:write(chunk) then |
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189 if len then |
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190 len = len - #chunk; |
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191 end |
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192 chunk = buffer:read_chunk(len); |
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193 else |
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194 error = true; |
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195 return error_cb("body-sink-write-failure"); |
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196 end |
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197 end |
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198 if len == 0 then |
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199 state = nil; |
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200 packet.partial = nil; |
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201 success_cb(packet); |
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202 end |
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203 elseif not len or buffer:length() >= len then -- or not len |
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204 assert(not chunked) |
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205 packet.body = len and buffer:read(len) or buffer:read_chunk() or ""; |
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206 state = nil; |
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207 packet.partial = nil; |
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208 success_cb(packet); |
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209 else |
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210 break; |
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211 end |
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212 else |
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213 break; |
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214 end |
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215 end |
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216 end; |
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217 }; |
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218 end |
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219 |
fc5d3b053454
net.http.{server|codes|parser}: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
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220 return httpstream; |