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annotate upstream_hash.t @ 572:ca54b445d982

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Tests: masked nginx bug in proxy next upstream. When iterating through several next upstreams per a worker cycle, a previously reported event about upstream connection error may be improperly applied to the next upstream, thus leading to the invalid connection error. E.g., in kqueue, where the problem is visible, this is caused by "ev->instance" that does not tolerate more than one next upstream at once, and kevents placed on the kqueue separately for read and write events. The change is to limit test case to the only one next upstream.
author Sergey Kandaurov <pluknet@nginx.com>
date Thu, 14 May 2015 11:54:24 +0300
parents 907e89fba9c3
children 6cdfd177319b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/perl
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2
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3 # (C) Sergey Kandaurov
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4 # (C) Nginx, Inc.
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5
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6 # Tests for upstream hash balancer module.
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7
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8 ###############################################################################
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9
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10 use warnings;
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11 use strict;
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12
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13 use Test::More;
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14
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15 BEGIN { use FindBin; chdir($FindBin::Bin); }
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16
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17 use lib 'lib';
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18 use Test::Nginx;
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19
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20 ###############################################################################
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21
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22 select STDERR; $| = 1;
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23 select STDOUT; $| = 1;
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24
568
907e89fba9c3 Tests: removed TODO and try_run() checks for legacy versions.
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25 my $t = Test::Nginx->new()->has(qw/http proxy rewrite upstream_hash/)->plan(11);
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26
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27 $t->write_file_expand('nginx.conf', <<'EOF');
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28
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29 %%TEST_GLOBALS%%
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30
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31 daemon off;
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32
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33 events {
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34 }
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35
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36 http {
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37 %%TEST_GLOBALS_HTTP%%
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38
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39 upstream u {
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40 hash $arg_a;
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41 server 127.0.0.1:8081;
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42 server 127.0.0.1:8082;
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43 server 127.0.0.1:8083;
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44 }
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45
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46 upstream u2 {
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47 hash $arg_a;
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48 server 127.0.0.1:8081;
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49 server 127.0.0.1:8083;
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50 }
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51
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52 upstream cw {
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53 hash $arg_a consistent;
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54 server 127.0.0.1:8081;
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55 server 127.0.0.1:8082;
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56 server 127.0.0.1:8083 weight=10;
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57 }
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58
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59 upstream cw2 {
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60 hash $arg_a consistent;
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61 server 127.0.0.1:8081;
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62 server 127.0.0.1:8083 weight=10;
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63 }
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64
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65 upstream c {
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66 hash $arg_a consistent;
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67 server 127.0.0.1:8081;
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68 server 127.0.0.1:8082;
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69 server 127.0.0.1:8083;
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70 }
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71
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72 upstream c2 {
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73 hash $arg_a consistent;
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74 server 127.0.0.1:8081;
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75 server 127.0.0.1:8083;
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76 }
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77
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78 upstream bad {
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79 hash $arg_a;
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80 server 127.0.0.1:8081;
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81 server 127.0.0.1:8084;
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82 }
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83
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84 upstream cbad {
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85 hash $arg_a consistent;
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86 server 127.0.0.1:8081;
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87 server 127.0.0.1:8084;
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88 }
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89
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90 server {
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91 listen 127.0.0.1:8080;
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92 server_name localhost;
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93
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94 location / {
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95 proxy_pass http://u;
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96 }
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97 location /2 {
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98 proxy_pass http://u2;
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99 }
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100 location /cw {
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101 proxy_pass http://cw;
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102 }
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103 location /cw2 {
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104 proxy_pass http://cw2;
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105 }
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106 location /c {
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107 proxy_pass http://c;
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108 }
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109 location /c2 {
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110 proxy_pass http://c2;
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111 }
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112 location /bad {
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113 proxy_pass http://bad;
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114 }
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115 location /cbad {
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116 proxy_pass http://cbad;
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117 }
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118 location /pnu {
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119 proxy_pass http://u/;
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120 proxy_next_upstream http_502;
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121 }
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122 }
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123
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124 server {
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125 listen 127.0.0.1:8081;
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126 listen 127.0.0.1:8082;
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127 listen 127.0.0.1:8083;
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128 server_name localhost;
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129
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130 add_header X-Port $server_port;
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131
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132 location / {
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133 return 204;
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134 }
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135
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136 location /502 {
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137 if ($server_port = 8083) {
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138 return 502;
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139 }
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140 return 204;
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141 }
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142 }
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143
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144 server {
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145 listen 127.0.0.1:8084;
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146 server_name localhost;
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147 return 444;
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148 }
411
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149 }
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150
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151 EOF
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152
568
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153 $t->run();
411
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154
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155 ###############################################################################
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156
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157 # Ony requests for absent peer are moved to other peers if hash is consistent.
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158 # Check this by comparing two upstreams with different number of peers.
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159
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160 ok(!cmp_peers([iter('/', 20)], [iter('/2', 20)], 8082), 'inconsistent');
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161 ok(cmp_peers([iter('/c', 20)], [iter('/c2', 20)], 8082), 'consistent');
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162 ok(cmp_peers([iter('/cw', 20)], [iter('/cw2', 20)], 8082), 'consistent weight');
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163
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164 like(many('/?a=1', 10), qr/808\d: 10/, 'stable hash');
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165 like(many('/c?a=1', 10), qr/808\d: 10/, 'stable hash - consistent');
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166
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167 my @res = iter('/', 10);
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168
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169 is(@res, 10, 'all hashed peers');
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170
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171 @res = grep { $_ != 8083 } @res;
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172 my @res2 = iter('/502', 10);
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173
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174 is_deeply(\@res, \@res2, 'no proxy_next_upstream');
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175 isnt(@res2, 10, 'no proxy_next_upstream peers');
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176
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177 is(iter('/pnu/502', 10), 10, 'proxy_next_upstream peers');
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178
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179 @res = grep { $_ == 8081 } iter('/bad', 20);
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180 is(@res, 20, 'all hashed peers - bad');
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181
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182 @res = grep { $_ == 8081 } iter('/cbad', 20);
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183 is(@res, 20, 'all hashed peers - bad consistent');
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184
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185 ###############################################################################
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186
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187 # Returns true if two arrays follow consistency, i.e., they may only differ
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188 # by @args present in $p, but absent in $p2, for the same indices.
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189
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190 sub cmp_peers {
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191 my ($p, $p2, @args) = @_;
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192
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193 for my $i (0 .. $#$p) {
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194 next if @{$p}[$i] == @{$p2}[$i];
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195 next if (grep $_ == @{$p}[$i], @args);
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196 return 0;
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197 }
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198
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199 return 1;
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200 }
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201
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202 # series of requests, each with unique hash key
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203
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204 sub iter {
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205 my ($uri, $count) = @_;
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206 my @res;
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207
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208 for my $i (1 .. $count) {
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209 if (http_get("$uri/?a=$i") =~ /X-Port: (\d+)/) {
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210 push @res, $1 if defined $1;
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211 }
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212 }
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213
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214 return @res;
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215 }
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216
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217 sub many {
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218 my ($uri, $count) = @_;
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219 my %ports;
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220
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221 for my $i (1 .. $count) {
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222 if (http_get($uri) =~ /X-Port: (\d+)/) {
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223 $ports{$1} = 0 unless defined $ports{$1};
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224 $ports{$1}++;
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225 }
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226 }
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227
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228 return join ', ', map { $_ . ": " . $ports{$_} } sort keys %ports;
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229 }
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230
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231 ###############################################################################