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Tests: tests for usage of discarded body. The client_max_body_size limit should be ignored when the request body is already discarded. In HTTP/1.x, this is done by checking the r->discard_body flag when the body is being discarded, and because r->headers_in.content_length_n is 0 when it's already discarded. This, however, does not happen with HTTP/2 and HTTP/3, and therefore "error_page 413" does not work without relaxing the limit. Further, with proxy_pass, r->headers_in.content_length_n is used to determine length of the request body, and therefore is not correct if discarding of the request body isn't yet complete. While discarding the request body, r->headers_in.content_length_n contains the rest of the body to discard (or, in case of chunked request body, the rest of the current chunk to discard). Similarly, the $content_length variable uses r->headers_in.content_length if available, and also incorrect. The $content_length variable is used when proxying with fastcgi_pass, grpc_pass, and uwsgi_pass (scgi_pass uses the value calculated based on the actual request body buffers, and therefore works correctly).
author Maxim Dounin <mdounin@mdounin.ru>
date Sat, 27 Apr 2024 18:55:50 +0300
parents 882267679006
children
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1 #!/usr/bin/perl
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2
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3 # (C) Sergey Kandaurov
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4 # (C) Nginx, Inc.
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5
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6 # Tests for split_client module.
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7
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8 ###############################################################################
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9
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10 use warnings;
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11 use strict;
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12
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13 use Test::More;
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14
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15 BEGIN { use FindBin; chdir($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
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25 my $t = Test::Nginx->new()->has(qw/http split_clients/)->plan(1);
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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 split_clients $connection $variant {
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40 51.2% ".one";
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41 10% ".two";
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42 * ".three";
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43 }
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44
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45 server {
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46 listen 127.0.0.1:8080;
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47 server_name localhost;
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48
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49 location / {
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50 index index${variant}.html;
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51 }
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52 }
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53 }
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54
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55 EOF
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56
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57 $t->write_file('index.one.html', 'first');
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58 $t->write_file('index.two.html', 'second');
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59 $t->write_file('index.three.html', 'third');
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60
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61 $t->run();
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62
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63 ###############################################################################
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64
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65 # NB: split_clients distribution is a subject to implementation details
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66
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67 like(many('/', 20), qr/first: 12, second: 2, third: 6/, 'split');
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68
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69 ###############################################################################
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70
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71 sub many {
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72 my ($uri, $count) = @_;
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73 my %dist;
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74
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75 for (1 .. $count) {
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76 if (http_get($uri) =~ /(first|second|third)/) {
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77 $dist{$1} = 0 unless defined $dist{$1};
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78 $dist{$1}++;
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79 }
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80 }
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81
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82 return join ', ', map { $_ . ": " . $dist{$_} } sort keys %dist;
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83 }
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84
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85 ###############################################################################