prosody
604dbcb2d46e
util/httpstream.lua

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util/httpstream.lua @ 3883:604dbcb2d46e

Fix lua lib name in LDFLAGS.
author Tobias Markmann <tm@ayena.de>
date Tue, 14 Dec 2010 18:35:05 +0100
parent 3570:6ef68af9431c
child 3902:a34333fcae72
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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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e2cc09e83a3e util.httpstream: A little refactoring of the coroutine control flow.
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125 local success, result = coroutine.resume(co, data);
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126 if result then
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9408d1e10e17 util.httpstream: Refactored and simplified code to improve readability.
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parents: 3495
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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;
0f185563a4e4 util.httpstream: Initial commit of the new HTTP parser.
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131 };
0f185563a4e4 util.httpstream: Initial commit of the new HTTP parser.
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132 end
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133
0f185563a4e4 util.httpstream: Initial commit of the new HTTP parser.
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134 return _M;