Mercurial > hg > nginx
annotate src/http/modules/ngx_http_not_modified_filter_module.c @ 8795:278ab0ed24f2 quic
HTTP/3: generate more H3_FRAME_UNEXPECTED.
As per quic-http-34, these are the cases when this error should be generated:
If an endpoint receives a second SETTINGS frame
on the control stream, the endpoint MUST respond with a connection
error of type H3_FRAME_UNEXPECTED
SETTINGS frames MUST NOT be sent on any stream other than the control
stream. If an endpoint receives a SETTINGS frame on a different
stream, the endpoint MUST respond with a connection error of type
H3_FRAME_UNEXPECTED.
A client MUST NOT send a PUSH_PROMISE frame. A server MUST treat the
receipt of a PUSH_PROMISE frame as a connection error of type
H3_FRAME_UNEXPECTED; see Section 8.
The MAX_PUSH_ID frame is always sent on the control stream. Receipt
of a MAX_PUSH_ID frame on any other stream MUST be treated as a
connection error of type H3_FRAME_UNEXPECTED.
Receipt of an invalid sequence of frames MUST be treated as a
connection error of type H3_FRAME_UNEXPECTED; see Section 8. In
particular, a DATA frame before any HEADERS frame, or a HEADERS or
DATA frame after the trailing HEADERS frame, is considered invalid.
A CANCEL_PUSH frame is sent on the control stream. Receiving a
CANCEL_PUSH frame on a stream other than the control stream MUST be
treated as a connection error of type H3_FRAME_UNEXPECTED.
The GOAWAY frame is always sent on the control stream.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Fri, 11 Jun 2021 12:11:08 +0300 |
parents | 8b6fa4842133 |
children |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_http.h> |
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11 |
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12 |
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13 static ngx_uint_t ngx_http_test_if_unmodified(ngx_http_request_t *r); |
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14 static ngx_uint_t ngx_http_test_if_modified(ngx_http_request_t *r); |
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15 static ngx_uint_t ngx_http_test_if_match(ngx_http_request_t *r, |
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16 ngx_table_elt_t *header, ngx_uint_t weak); |
681 | 17 static ngx_int_t ngx_http_not_modified_filter_init(ngx_conf_t *cf); |
135
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18 |
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19 |
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20 static ngx_http_module_t ngx_http_not_modified_filter_module_ctx = { |
509 | 21 NULL, /* preconfiguration */ |
681 | 22 ngx_http_not_modified_filter_init, /* postconfiguration */ |
177
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23 |
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24 NULL, /* create main configuration */ |
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25 NULL, /* init main configuration */ |
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26 |
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27 NULL, /* create server configuration */ |
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28 NULL, /* merge server configuration */ |
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29 |
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30 NULL, /* create location configuration */ |
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31 NULL /* merge location configuration */ |
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32 }; |
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33 |
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34 |
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35 ngx_module_t ngx_http_not_modified_filter_module = { |
509 | 36 NGX_MODULE_V1, |
135
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37 &ngx_http_not_modified_filter_module_ctx, /* module context */ |
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38 NULL, /* module directives */ |
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39 NGX_HTTP_MODULE, /* module type */ |
541 | 40 NULL, /* init master */ |
681 | 41 NULL, /* init module */ |
541 | 42 NULL, /* init process */ |
43 NULL, /* init thread */ | |
44 NULL, /* exit thread */ | |
45 NULL, /* exit process */ | |
46 NULL, /* exit master */ | |
47 NGX_MODULE_V1_PADDING | |
135
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48 }; |
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49 |
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50 |
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51 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; |
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52 |
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53 |
2702 | 54 static ngx_int_t |
55 ngx_http_not_modified_header_filter(ngx_http_request_t *r) | |
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56 { |
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57 if (r->headers_out.status != NGX_HTTP_OK |
597 | 58 || r != r->main |
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59 || r->disable_not_modified) |
135
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60 { |
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61 return ngx_http_next_header_filter(r); |
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62 } |
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63 |
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64 if (r->headers_in.if_unmodified_since |
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65 && !ngx_http_test_if_unmodified(r)) |
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66 { |
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67 return ngx_http_filter_finalize_request(r, NULL, |
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68 NGX_HTTP_PRECONDITION_FAILED); |
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69 } |
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70 |
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71 if (r->headers_in.if_match |
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72 && !ngx_http_test_if_match(r, r->headers_in.if_match, 0)) |
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73 { |
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74 return ngx_http_filter_finalize_request(r, NULL, |
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75 NGX_HTTP_PRECONDITION_FAILED); |
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76 } |
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77 |
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78 if (r->headers_in.if_modified_since || r->headers_in.if_none_match) { |
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79 |
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80 if (r->headers_in.if_modified_since |
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81 && ngx_http_test_if_modified(r)) |
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82 { |
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83 return ngx_http_next_header_filter(r); |
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84 } |
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85 |
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86 if (r->headers_in.if_none_match |
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87 && !ngx_http_test_if_match(r, r->headers_in.if_none_match, 1)) |
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88 { |
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89 return ngx_http_next_header_filter(r); |
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90 } |
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91 |
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92 /* not modified */ |
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93 |
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94 r->headers_out.status = NGX_HTTP_NOT_MODIFIED; |
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95 r->headers_out.status_line.len = 0; |
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96 r->headers_out.content_type.len = 0; |
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97 ngx_http_clear_content_length(r); |
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98 ngx_http_clear_accept_ranges(r); |
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99 |
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100 if (r->headers_out.content_encoding) { |
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101 r->headers_out.content_encoding->hash = 0; |
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102 r->headers_out.content_encoding = NULL; |
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103 } |
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104 |
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105 return ngx_http_next_header_filter(r); |
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106 } |
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107 |
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108 return ngx_http_next_header_filter(r); |
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109 } |
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110 |
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111 |
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112 static ngx_uint_t |
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113 ngx_http_test_if_unmodified(ngx_http_request_t *r) |
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114 { |
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115 time_t iums; |
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116 |
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117 if (r->headers_out.last_modified_time == (time_t) -1) { |
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118 return 0; |
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119 } |
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120 |
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Moved ngx_http_parse_time() to core, renamed accordingly.
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121 iums = ngx_parse_http_time(r->headers_in.if_unmodified_since->value.data, |
3814
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"If-Unmodified-Since" support
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122 r->headers_in.if_unmodified_since->value.len); |
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123 |
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124 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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125 "http iums:%T lm:%T", iums, r->headers_out.last_modified_time); |
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|
126 |
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127 if (iums >= r->headers_out.last_modified_time) { |
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128 return 1; |
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129 } |
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130 |
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131 return 0; |
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132 } |
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133 |
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134 |
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135 static ngx_uint_t |
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136 ngx_http_test_if_modified(ngx_http_request_t *r) |
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137 { |
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138 time_t ims; |
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139 ngx_http_core_loc_conf_t *clcf; |
135
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140 |
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141 if (r->headers_out.last_modified_time == (time_t) -1) { |
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142 return 1; |
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143 } |
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144 |
2496 | 145 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
146 | |
147 if (clcf->if_modified_since == NGX_HTTP_IMS_OFF) { | |
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148 return 1; |
2496 | 149 } |
150 | |
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151 ims = ngx_parse_http_time(r->headers_in.if_modified_since->value.data, |
135
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152 r->headers_in.if_modified_since->value.len); |
577 | 153 |
257
70e1c7d2b83d
nginx-0.0.2-2004-02-11-20:08:49 import
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154 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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155 "http ims:%T lm:%T", ims, r->headers_out.last_modified_time); |
135
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156 |
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157 if (ims == r->headers_out.last_modified_time) { |
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158 return 0; |
135
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159 } |
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160 |
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161 if (clcf->if_modified_since == NGX_HTTP_IMS_EXACT |
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162 || ims < r->headers_out.last_modified_time) |
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163 { |
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164 return 1; |
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|
165 } |
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166 |
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167 return 0; |
135
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168 } |
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169 |
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170 |
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171 static ngx_uint_t |
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172 ngx_http_test_if_match(ngx_http_request_t *r, ngx_table_elt_t *header, |
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173 ngx_uint_t weak) |
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174 { |
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175 u_char *start, *end, ch; |
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176 ngx_str_t etag, *list; |
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177 |
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178 list = &header->value; |
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179 |
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180 if (list->len == 1 && list->data[0] == '*') { |
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181 return 1; |
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|
182 } |
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|
183 |
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|
184 if (r->headers_out.etag == NULL) { |
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185 return 0; |
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|
186 } |
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|
187 |
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|
188 etag = r->headers_out.etag->value; |
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|
189 |
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diff
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|
190 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
5734
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diff
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|
191 "http im:\"%V\" etag:%V", list, &etag); |
af229f8cf987
Entity tags: weak comparison for If-None-Match.
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|
192 |
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diff
changeset
|
193 if (weak |
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|
194 && etag.len > 2 |
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|
195 && etag.data[0] == 'W' |
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|
196 && etag.data[1] == '/') |
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|
197 { |
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diff
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|
198 etag.len -= 2; |
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|
199 etag.data += 2; |
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diff
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|
200 } |
4744
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|
201 |
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|
202 start = list->data; |
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diff
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|
203 end = list->data + list->len; |
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|
204 |
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changeset
|
205 while (start < end) { |
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|
206 |
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|
207 if (weak |
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|
208 && end - start > 2 |
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|
209 && start[0] == 'W' |
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|
210 && start[1] == '/') |
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Entity tags: weak comparison for If-None-Match.
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diff
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|
211 { |
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diff
changeset
|
212 start += 2; |
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diff
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|
213 } |
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diff
changeset
|
214 |
af229f8cf987
Entity tags: weak comparison for If-None-Match.
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diff
changeset
|
215 if (etag.len > (size_t) (end - start)) { |
4744
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Entity tags: basic support in not modified filter.
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diff
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|
216 return 0; |
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diff
changeset
|
217 } |
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changeset
|
218 |
5734
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diff
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|
219 if (ngx_strncmp(start, etag.data, etag.len) != 0) { |
4744
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Entity tags: basic support in not modified filter.
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diff
changeset
|
220 goto skip; |
5b93a9ac60ed
Entity tags: basic support in not modified filter.
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diff
changeset
|
221 } |
5b93a9ac60ed
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diff
changeset
|
222 |
5734
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diff
changeset
|
223 start += etag.len; |
4744
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diff
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|
224 |
5b93a9ac60ed
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diff
changeset
|
225 while (start < end) { |
5b93a9ac60ed
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diff
changeset
|
226 ch = *start; |
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|
227 |
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diff
changeset
|
228 if (ch == ' ' || ch == '\t') { |
5b93a9ac60ed
Entity tags: basic support in not modified filter.
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diff
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|
229 start++; |
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diff
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|
230 continue; |
5b93a9ac60ed
Entity tags: basic support in not modified filter.
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changeset
|
231 } |
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changeset
|
232 |
5b93a9ac60ed
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diff
changeset
|
233 break; |
5b93a9ac60ed
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changeset
|
234 } |
5b93a9ac60ed
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changeset
|
235 |
5b93a9ac60ed
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diff
changeset
|
236 if (start == end || *start == ',') { |
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Entity tags: basic support in not modified filter.
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|
237 return 1; |
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Entity tags: basic support in not modified filter.
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diff
changeset
|
238 } |
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parents:
4743
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239 |
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240 skip: |
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241 |
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242 while (start < end && *start != ',') { start++; } |
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243 while (start < end) { |
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244 ch = *start; |
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245 |
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246 if (ch == ' ' || ch == '\t' || ch == ',') { |
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247 start++; |
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248 continue; |
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249 } |
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250 |
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251 break; |
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252 } |
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253 } |
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254 |
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255 return 0; |
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256 } |
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257 |
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258 |
2702 | 259 static ngx_int_t |
260 ngx_http_not_modified_filter_init(ngx_conf_t *cf) | |
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261 { |
155
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262 ngx_http_next_header_filter = ngx_http_top_header_filter; |
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263 ngx_http_top_header_filter = ngx_http_not_modified_header_filter; |
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264 |
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265 return NGX_OK; |
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266 } |