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296
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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660
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4 * Copyright (C) Nginx, Inc.
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296
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5 */
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6
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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 typedef struct {
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464
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14 ngx_str_t match;
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15 ngx_http_complex_value_t value;
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296
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16
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464
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17 ngx_hash_t types;
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296
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18
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464
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19 ngx_flag_t once;
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394
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20
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464
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21 ngx_array_t *types_keys;
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296
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22 } ngx_http_sub_loc_conf_t;
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23
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24
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25 typedef enum {
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26 sub_start_state = 0,
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27 sub_match_state,
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28 } ngx_http_sub_state_e;
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29
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30
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31 typedef struct {
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464
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32 ngx_str_t match;
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584
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33 ngx_str_t saved;
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34 ngx_str_t looked;
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296
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35
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464
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36 ngx_uint_t once; /* unsigned once:1 */
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296
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37
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464
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38 ngx_buf_t *buf;
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296
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39
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464
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40 u_char *pos;
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41 u_char *copy_start;
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42 u_char *copy_end;
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296
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43
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464
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44 ngx_chain_t *in;
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45 ngx_chain_t *out;
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46 ngx_chain_t **last_out;
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47 ngx_chain_t *busy;
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48 ngx_chain_t *free;
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296
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49
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464
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50 ngx_str_t sub;
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296
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51
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464
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52 ngx_uint_t state;
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296
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53 } ngx_http_sub_ctx_t;
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54
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55
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56 static ngx_int_t ngx_http_sub_output(ngx_http_request_t *r,
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57 ngx_http_sub_ctx_t *ctx);
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58 static ngx_int_t ngx_http_sub_parse(ngx_http_request_t *r,
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59 ngx_http_sub_ctx_t *ctx);
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60
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61 static char * ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd,
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62 void *conf);
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63 static void *ngx_http_sub_create_conf(ngx_conf_t *cf);
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64 static char *ngx_http_sub_merge_conf(ngx_conf_t *cf,
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65 void *parent, void *child);
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66 static ngx_int_t ngx_http_sub_filter_init(ngx_conf_t *cf);
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67
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68
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69 static ngx_command_t ngx_http_sub_filter_commands[] = {
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70
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71 { ngx_string("sub_filter"),
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72 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
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73 ngx_http_sub_filter,
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74 NGX_HTTP_LOC_CONF_OFFSET,
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75 0,
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76 NULL },
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77
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78 { ngx_string("sub_filter_types"),
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79 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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394
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80 ngx_http_types_slot,
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296
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81 NGX_HTTP_LOC_CONF_OFFSET,
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394
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82 offsetof(ngx_http_sub_loc_conf_t, types_keys),
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83 &ngx_http_html_default_types[0] },
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296
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84
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85 { ngx_string("sub_filter_once"),
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86 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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87 ngx_conf_set_flag_slot,
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88 NGX_HTTP_LOC_CONF_OFFSET,
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89 offsetof(ngx_http_sub_loc_conf_t, once),
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90 NULL },
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91
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92 ngx_null_command
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93 };
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94
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95
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96 static ngx_http_module_t ngx_http_sub_filter_module_ctx = {
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97 NULL, /* preconfiguration */
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98 ngx_http_sub_filter_init, /* postconfiguration */
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99
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100 NULL, /* create main configuration */
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101 NULL, /* init main configuration */
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102
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103 NULL, /* create server configuration */
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104 NULL, /* merge server configuration */
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105
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106 ngx_http_sub_create_conf, /* create location configuration */
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107 ngx_http_sub_merge_conf /* merge location configuration */
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108 };
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109
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110
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111 ngx_module_t ngx_http_sub_filter_module = {
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112 NGX_MODULE_V1,
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113 &ngx_http_sub_filter_module_ctx, /* module context */
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114 ngx_http_sub_filter_commands, /* module directives */
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115 NGX_HTTP_MODULE, /* module type */
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116 NULL, /* init master */
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117 NULL, /* init module */
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118 NULL, /* init process */
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119 NULL, /* init thread */
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120 NULL, /* exit thread */
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121 NULL, /* exit process */
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122 NULL, /* exit master */
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123 NGX_MODULE_V1_PADDING
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124 };
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125
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126
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127 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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128 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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129
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130
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131 static ngx_int_t
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132 ngx_http_sub_header_filter(ngx_http_request_t *r)
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133 {
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134 ngx_http_sub_ctx_t *ctx;
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135 ngx_http_sub_loc_conf_t *slcf;
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136
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137 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module);
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138
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139 if (slcf->match.len == 0
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394
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140 || r->headers_out.content_length_n == 0
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141 || ngx_http_test_content_type(r, &slcf->types) == NULL)
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296
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142 {
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143 return ngx_http_next_header_filter(r);
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144 }
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145
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146 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_ctx_t));
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147 if (ctx == NULL) {
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148 return NGX_ERROR;
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149 }
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150
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584
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151 ctx->saved.data = ngx_pnalloc(r->pool, slcf->match.len);
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152 if (ctx->saved.data == NULL) {
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153 return NGX_ERROR;
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154 }
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155
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156 ctx->looked.data = ngx_pnalloc(r->pool, slcf->match.len);
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157 if (ctx->looked.data == NULL) {
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158 return NGX_ERROR;
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159 }
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160
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296
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161 ngx_http_set_ctx(r, ctx, ngx_http_sub_filter_module);
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162
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163 ctx->match = slcf->match;
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164 ctx->last_out = &ctx->out;
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165
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166 r->filter_need_in_memory = 1;
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167
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168 if (r == r->main) {
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169 ngx_http_clear_content_length(r);
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170 ngx_http_clear_last_modified(r);
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680
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171 ngx_http_clear_etag(r);
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296
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172 }
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173
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174 return ngx_http_next_header_filter(r);
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175 }
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176
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177
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178 static ngx_int_t
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179 ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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180 {
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181 ngx_int_t rc;
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182 ngx_buf_t *b;
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183 ngx_chain_t *cl;
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184 ngx_http_sub_ctx_t *ctx;
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185 ngx_http_sub_loc_conf_t *slcf;
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186
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187 ctx = ngx_http_get_module_ctx(r, ngx_http_sub_filter_module);
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188
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189 if (ctx == NULL) {
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190 return ngx_http_next_body_filter(r, in);
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191 }
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192
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193 if ((in == NULL
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194 && ctx->buf == NULL
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195 && ctx->in == NULL
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196 && ctx->busy == NULL))
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197 {
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198 return ngx_http_next_body_filter(r, in);
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199 }
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200
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201 if (ctx->once && (ctx->buf == NULL || ctx->in == NULL)) {
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202
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203 if (ctx->busy) {
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204 if (ngx_http_sub_output(r, ctx) == NGX_ERROR) {
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205 return NGX_ERROR;
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206 }
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207 }
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208
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209 return ngx_http_next_body_filter(r, in);
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210 }
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211
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212 /* add the incoming chain to the chain ctx->in */
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213
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214 if (in) {
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454
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215 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) {
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296
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216 return NGX_ERROR;
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217 }
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218 }
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219
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220 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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221 "http sub filter \"%V\"", &r->uri);
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222
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223 while (ctx->in || ctx->buf) {
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224
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582
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225 if (ctx->buf == NULL) {
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296
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226 ctx->buf = ctx->in->buf;
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227 ctx->in = ctx->in->next;
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228 ctx->pos = ctx->buf->pos;
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229 }
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230
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231 if (ctx->state == sub_start_state) {
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232 ctx->copy_start = ctx->pos;
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233 ctx->copy_end = ctx->pos;
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234 }
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235
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236 b = NULL;
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237
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238 while (ctx->pos < ctx->buf->last) {
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239
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240 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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584
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241 "saved: \"%V\" state: %d", &ctx->saved, ctx->state);
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296
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242
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243 rc = ngx_http_sub_parse(r, ctx);
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244
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245 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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584
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246 "parse: %d, looked: \"%V\" %p-%p",
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247 rc, &ctx->looked, ctx->copy_start, ctx->copy_end);
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296
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248
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249 if (rc == NGX_ERROR) {
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250 return rc;
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251 }
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252
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253 if (ctx->copy_start != ctx->copy_end) {
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254
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255 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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584
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256 "saved: \"%V\"", &ctx->saved);
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296
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257
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584
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258 if (ctx->saved.len) {
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296
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259
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260 if (ctx->free) {
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261 cl = ctx->free;
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262 ctx->free = ctx->free->next;
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263 b = cl->buf;
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264 ngx_memzero(b, sizeof(ngx_buf_t));
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265
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266 } else {
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267 b = ngx_calloc_buf(r->pool);
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268 if (b == NULL) {
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269 return NGX_ERROR;
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270 }
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271
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272 cl = ngx_alloc_chain_link(r->pool);
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273 if (cl == NULL) {
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274 return NGX_ERROR;
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275 }
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276
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277 cl->buf = b;
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278 }
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279
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584
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280 b->pos = ngx_pnalloc(r->pool, ctx->saved.len);
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281 if (b->pos == NULL) {
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282 return NGX_ERROR;
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283 }
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284
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285 ngx_memcpy(b->pos, ctx->saved.data, ctx->saved.len);
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286 b->last = b->pos + ctx->saved.len;
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296
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287 b->memory = 1;
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288
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289 *ctx->last_out = cl;
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290 ctx->last_out = &cl->next;
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291
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584
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292 ctx->saved.len = 0;
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296
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293 }
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294
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295 if (ctx->free) {
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296 cl = ctx->free;
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297 ctx->free = ctx->free->next;
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298 b = cl->buf;
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299
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300 } else {
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301 b = ngx_alloc_buf(r->pool);
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302 if (b == NULL) {
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303 return NGX_ERROR;
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304 }
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305
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306 cl = ngx_alloc_chain_link(r->pool);
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307 if (cl == NULL) {
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308 return NGX_ERROR;
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309 }
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310
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311 cl->buf = b;
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312 }
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313
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314 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t));
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315
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316 b->pos = ctx->copy_start;
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317 b->last = ctx->copy_end;
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318 b->shadow = NULL;
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319 b->last_buf = 0;
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320 b->recycled = 0;
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321
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322 if (b->in_file) {
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386
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323 b->file_last = b->file_pos + (b->last - ctx->buf->pos);
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324 b->file_pos += b->pos - ctx->buf->pos;
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296
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325 }
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326
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327 cl->next = NULL;
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328 *ctx->last_out = cl;
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329 ctx->last_out = &cl->next;
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330 }
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331
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332 if (ctx->state == sub_start_state) {
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333 ctx->copy_start = ctx->pos;
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334 ctx->copy_end = ctx->pos;
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335
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336 } else {
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337 ctx->copy_start = NULL;
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338 ctx->copy_end = NULL;
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339 }
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340
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341 if (rc == NGX_AGAIN) {
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342 continue;
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343 }
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344
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345
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346 /* rc == NGX_OK */
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347
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348 b = ngx_calloc_buf(r->pool);
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349 if (b == NULL) {
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350 return NGX_ERROR;
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351 }
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352
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353 cl = ngx_alloc_chain_link(r->pool);
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354 if (cl == NULL) {
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355 return NGX_ERROR;
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356 }
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357
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358 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module);
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359
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360 if (ctx->sub.data == NULL) {
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361
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464
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362 if (ngx_http_complex_value(r, &slcf->value, &ctx->sub)
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363 != NGX_OK)
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296
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364 {
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365 return NGX_ERROR;
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366 }
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367 }
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368
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340
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369 if (ctx->sub.len) {
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370 b->memory = 1;
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371 b->pos = ctx->sub.data;
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372 b->last = ctx->sub.data + ctx->sub.len;
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373
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374 } else {
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375 b->sync = 1;
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376 }
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296
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377
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378 cl->buf = b;
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379 cl->next = NULL;
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380 *ctx->last_out = cl;
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381 ctx->last_out = &cl->next;
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382
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383 ctx->once = slcf->once;
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384
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385 continue;
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386 }
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387
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388 if (ctx->buf->last_buf || ngx_buf_in_memory(ctx->buf)) {
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389 if (b == NULL) {
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390 if (ctx->free) {
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391 cl = ctx->free;
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392 ctx->free = ctx->free->next;
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393 b = cl->buf;
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394 ngx_memzero(b, sizeof(ngx_buf_t));
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395
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396 } else {
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397 b = ngx_calloc_buf(r->pool);
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398 if (b == NULL) {
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399 return NGX_ERROR;
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400 }
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401
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402 cl = ngx_alloc_chain_link(r->pool);
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403 if (cl == NULL) {
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404 return NGX_ERROR;
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405 }
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406
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407 cl->buf = b;
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408 }
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409
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410 b->sync = 1;
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411
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412 cl->next = NULL;
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413 *ctx->last_out = cl;
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414 ctx->last_out = &cl->next;
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|
|
415 }
|
|
|
416
|
|
|
417 b->last_buf = ctx->buf->last_buf;
|
|
|
418 b->shadow = ctx->buf;
|
|
|
419
|
|
|
420 b->recycled = ctx->buf->recycled;
|
|
|
421 }
|
|
|
422
|
|
|
423 ctx->buf = NULL;
|
|
|
424
|
|
584
|
425 ctx->saved.len = ctx->looked.len;
|
|
|
426 ngx_memcpy(ctx->saved.data, ctx->looked.data, ctx->looked.len);
|
|
296
|
427 }
|
|
|
428
|
|
|
429 if (ctx->out == NULL && ctx->busy == NULL) {
|
|
|
430 return NGX_OK;
|
|
|
431 }
|
|
|
432
|
|
|
433 return ngx_http_sub_output(r, ctx);
|
|
|
434 }
|
|
|
435
|
|
|
436
|
|
|
437 static ngx_int_t
|
|
|
438 ngx_http_sub_output(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx)
|
|
|
439 {
|
|
|
440 ngx_int_t rc;
|
|
|
441 ngx_buf_t *b;
|
|
|
442 ngx_chain_t *cl;
|
|
|
443
|
|
|
444 #if 1
|
|
|
445 b = NULL;
|
|
|
446 for (cl = ctx->out; cl; cl = cl->next) {
|
|
|
447 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
448 "sub out: %p %p", cl->buf, cl->buf->pos);
|
|
|
449 if (cl->buf == b) {
|
|
|
450 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
451 "the same buf was used in sub");
|
|
|
452 ngx_debug_point();
|
|
|
453 return NGX_ERROR;
|
|
|
454 }
|
|
|
455 b = cl->buf;
|
|
|
456 }
|
|
|
457 #endif
|
|
|
458
|
|
|
459 rc = ngx_http_next_body_filter(r, ctx->out);
|
|
|
460
|
|
|
461 if (ctx->busy == NULL) {
|
|
|
462 ctx->busy = ctx->out;
|
|
|
463
|
|
|
464 } else {
|
|
|
465 for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ }
|
|
|
466 cl->next = ctx->out;
|
|
|
467 }
|
|
|
468
|
|
|
469 ctx->out = NULL;
|
|
|
470 ctx->last_out = &ctx->out;
|
|
|
471
|
|
|
472 while (ctx->busy) {
|
|
|
473
|
|
|
474 cl = ctx->busy;
|
|
|
475 b = cl->buf;
|
|
|
476
|
|
|
477 if (ngx_buf_size(b) != 0) {
|
|
|
478 break;
|
|
|
479 }
|
|
|
480
|
|
|
481 if (b->shadow) {
|
|
|
482 b->shadow->pos = b->shadow->last;
|
|
|
483 }
|
|
|
484
|
|
|
485 ctx->busy = cl->next;
|
|
|
486
|
|
|
487 if (ngx_buf_in_memory(b) || b->in_file) {
|
|
|
488 /* add data bufs only to the free buf chain */
|
|
|
489
|
|
|
490 cl->next = ctx->free;
|
|
|
491 ctx->free = cl;
|
|
|
492 }
|
|
|
493 }
|
|
|
494
|
|
|
495 if (ctx->in || ctx->buf) {
|
|
|
496 r->buffered |= NGX_HTTP_SUB_BUFFERED;
|
|
|
497
|
|
|
498 } else {
|
|
|
499 r->buffered &= ~NGX_HTTP_SUB_BUFFERED;
|
|
|
500 }
|
|
|
501
|
|
|
502 return rc;
|
|
|
503 }
|
|
|
504
|
|
|
505
|
|
|
506 static ngx_int_t
|
|
|
507 ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx)
|
|
|
508 {
|
|
|
509 u_char *p, *last, *copy_end, ch, match;
|
|
|
510 size_t looked;
|
|
|
511 ngx_http_sub_state_e state;
|
|
|
512
|
|
|
513 if (ctx->once) {
|
|
|
514 ctx->copy_start = ctx->pos;
|
|
|
515 ctx->copy_end = ctx->buf->last;
|
|
|
516 ctx->pos = ctx->buf->last;
|
|
584
|
517 ctx->looked.len = 0;
|
|
296
|
518
|
|
|
519 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "once");
|
|
|
520
|
|
|
521 return NGX_AGAIN;
|
|
|
522 }
|
|
|
523
|
|
|
524 state = ctx->state;
|
|
584
|
525 looked = ctx->looked.len;
|
|
296
|
526 last = ctx->buf->last;
|
|
|
527 copy_end = ctx->copy_end;
|
|
|
528
|
|
|
529 for (p = ctx->pos; p < last; p++) {
|
|
|
530
|
|
|
531 ch = *p;
|
|
|
532 ch = ngx_tolower(ch);
|
|
|
533
|
|
|
534 if (state == sub_start_state) {
|
|
|
535
|
|
|
536 /* the tight loop */
|
|
|
537
|
|
|
538 match = ctx->match.data[0];
|
|
|
539
|
|
|
540 for ( ;; ) {
|
|
|
541 if (ch == match) {
|
|
|
542 copy_end = p;
|
|
584
|
543 ctx->looked.data[0] = *p;
|
|
296
|
544 looked = 1;
|
|
|
545 state = sub_match_state;
|
|
|
546
|
|
|
547 goto match_started;
|
|
|
548 }
|
|
|
549
|
|
|
550 if (++p == last) {
|
|
|
551 break;
|
|
|
552 }
|
|
|
553
|
|
|
554 ch = *p;
|
|
|
555 ch = ngx_tolower(ch);
|
|
|
556 }
|
|
|
557
|
|
340
|
558 ctx->state = state;
|
|
296
|
559 ctx->pos = p;
|
|
584
|
560 ctx->looked.len = looked;
|
|
296
|
561 ctx->copy_end = p;
|
|
|
562
|
|
|
563 if (ctx->copy_start == NULL) {
|
|
|
564 ctx->copy_start = ctx->buf->pos;
|
|
|
565 }
|
|
|
566
|
|
|
567 return NGX_AGAIN;
|
|
|
568
|
|
|
569 match_started:
|
|
|
570
|
|
|
571 continue;
|
|
|
572 }
|
|
|
573
|
|
|
574 /* state == sub_match_state */
|
|
|
575
|
|
|
576 if (ch == ctx->match.data[looked]) {
|
|
584
|
577 ctx->looked.data[looked] = *p;
|
|
296
|
578 looked++;
|
|
|
579
|
|
|
580 if (looked == ctx->match.len) {
|
|
340
|
581 if ((size_t) (p - ctx->pos) < looked) {
|
|
584
|
582 ctx->saved.len = 0;
|
|
340
|
583 }
|
|
|
584
|
|
296
|
585 ctx->state = sub_start_state;
|
|
|
586 ctx->pos = p + 1;
|
|
584
|
587 ctx->looked.len = 0;
|
|
296
|
588 ctx->copy_end = copy_end;
|
|
|
589
|
|
|
590 if (ctx->copy_start == NULL && copy_end) {
|
|
|
591 ctx->copy_start = ctx->buf->pos;
|
|
|
592 }
|
|
|
593
|
|
|
594 return NGX_OK;
|
|
|
595 }
|
|
|
596
|
|
|
597 } else if (ch == ctx->match.data[0]) {
|
|
|
598 copy_end = p;
|
|
584
|
599 ctx->looked.data[0] = *p;
|
|
296
|
600 looked = 1;
|
|
|
601
|
|
|
602 } else {
|
|
|
603 copy_end = p;
|
|
|
604 looked = 0;
|
|
|
605 state = sub_start_state;
|
|
|
606 }
|
|
|
607 }
|
|
|
608
|
|
|
609 ctx->state = state;
|
|
|
610 ctx->pos = p;
|
|
584
|
611 ctx->looked.len = looked;
|
|
296
|
612
|
|
|
613 ctx->copy_end = (state == sub_start_state) ? p : copy_end;
|
|
|
614
|
|
|
615 if (ctx->copy_start == NULL && ctx->copy_end) {
|
|
|
616 ctx->copy_start = ctx->buf->pos;
|
|
|
617 }
|
|
|
618
|
|
|
619 return NGX_AGAIN;
|
|
|
620 }
|
|
|
621
|
|
|
622
|
|
|
623 static char *
|
|
|
624 ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
625 {
|
|
|
626 ngx_http_sub_loc_conf_t *slcf = conf;
|
|
|
627
|
|
464
|
628 ngx_str_t *value;
|
|
|
629 ngx_http_compile_complex_value_t ccv;
|
|
296
|
630
|
|
|
631 if (slcf->match.len) {
|
|
|
632 return "is duplicate";
|
|
|
633 }
|
|
|
634
|
|
|
635 value = cf->args->elts;
|
|
|
636
|
|
392
|
637 ngx_strlow(value[1].data, value[1].data, value[1].len);
|
|
296
|
638
|
|
392
|
639 slcf->match = value[1];
|
|
296
|
640
|
|
464
|
641 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
296
|
642
|
|
464
|
643 ccv.cf = cf;
|
|
|
644 ccv.value = &value[2];
|
|
|
645 ccv.complex_value = &slcf->value;
|
|
296
|
646
|
|
464
|
647 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
296
|
648 return NGX_CONF_ERROR;
|
|
|
649 }
|
|
|
650
|
|
|
651 return NGX_CONF_OK;
|
|
|
652 }
|
|
|
653
|
|
|
654
|
|
|
655 static void *
|
|
|
656 ngx_http_sub_create_conf(ngx_conf_t *cf)
|
|
|
657 {
|
|
|
658 ngx_http_sub_loc_conf_t *slcf;
|
|
|
659
|
|
|
660 slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sub_loc_conf_t));
|
|
|
661 if (slcf == NULL) {
|
|
496
|
662 return NULL;
|
|
296
|
663 }
|
|
|
664
|
|
|
665 /*
|
|
|
666 * set by ngx_pcalloc():
|
|
|
667 *
|
|
394
|
668 * conf->match = { 0, NULL };
|
|
|
669 * conf->sub = { 0, NULL };
|
|
296
|
670 * conf->sub_lengths = NULL;
|
|
|
671 * conf->sub_values = NULL;
|
|
394
|
672 * conf->types = { NULL };
|
|
|
673 * conf->types_keys = NULL;
|
|
296
|
674 */
|
|
|
675
|
|
|
676 slcf->once = NGX_CONF_UNSET;
|
|
|
677
|
|
|
678 return slcf;
|
|
|
679 }
|
|
|
680
|
|
|
681
|
|
|
682 static char *
|
|
|
683 ngx_http_sub_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
684 {
|
|
|
685 ngx_http_sub_loc_conf_t *prev = parent;
|
|
|
686 ngx_http_sub_loc_conf_t *conf = child;
|
|
|
687
|
|
|
688 ngx_conf_merge_value(conf->once, prev->once, 1);
|
|
|
689 ngx_conf_merge_str_value(conf->match, prev->match, "");
|
|
|
690
|
|
464
|
691 if (conf->value.value.len == 0) {
|
|
|
692 conf->value = prev->value;
|
|
296
|
693 }
|
|
|
694
|
|
554
|
695 if (ngx_http_merge_types(cf, &conf->types_keys, &conf->types,
|
|
|
696 &prev->types_keys, &prev->types,
|
|
394
|
697 ngx_http_html_default_types)
|
|
|
698 != NGX_OK)
|
|
|
699 {
|
|
|
700 return NGX_CONF_ERROR;
|
|
296
|
701 }
|
|
|
702
|
|
|
703 return NGX_CONF_OK;
|
|
|
704 }
|
|
|
705
|
|
|
706
|
|
|
707 static ngx_int_t
|
|
|
708 ngx_http_sub_filter_init(ngx_conf_t *cf)
|
|
|
709 {
|
|
|
710 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
711 ngx_http_top_header_filter = ngx_http_sub_header_filter;
|
|
|
712
|
|
|
713 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
714 ngx_http_top_body_filter = ngx_http_sub_body_filter;
|
|
|
715
|
|
|
716 return NGX_OK;
|
|
|
717 }
|
