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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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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11
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12 typedef struct {
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13 ngx_str_t match;
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14 ngx_str_t sub;
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15
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16 ngx_array_t *types; /* array of ngx_str_t */
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17
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18 ngx_array_t *sub_lengths;
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19 ngx_array_t *sub_values;
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20
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21 ngx_flag_t once;
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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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32 ngx_str_t match;
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33
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34 ngx_uint_t once; /* unsigned once:1 */
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35
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36 ngx_buf_t *buf;
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37
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38 u_char *pos;
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39 u_char *copy_start;
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40 u_char *copy_end;
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41
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42 ngx_chain_t *in;
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43 ngx_chain_t *out;
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44 ngx_chain_t **last_out;
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45 ngx_chain_t *busy;
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46 ngx_chain_t *free;
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47
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48 ngx_str_t sub;
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49
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50 ngx_uint_t state;
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51 size_t saved;
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52 size_t looked;
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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 char *ngx_http_sub_types(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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64 static void *ngx_http_sub_create_conf(ngx_conf_t *cf);
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65 static char *ngx_http_sub_merge_conf(ngx_conf_t *cf,
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66 void *parent, void *child);
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67 static ngx_int_t ngx_http_sub_filter_init(ngx_conf_t *cf);
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68
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69
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70 static ngx_command_t ngx_http_sub_filter_commands[] = {
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71
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72 { ngx_string("sub_filter"),
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73 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
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74 ngx_http_sub_filter,
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75 NGX_HTTP_LOC_CONF_OFFSET,
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76 0,
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77 NULL },
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78
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79 { ngx_string("sub_filter_types"),
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80 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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81 ngx_http_sub_types,
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82 NGX_HTTP_LOC_CONF_OFFSET,
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83 0,
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84 NULL },
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85
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86 { ngx_string("sub_filter_once"),
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87 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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88 ngx_conf_set_flag_slot,
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89 NGX_HTTP_LOC_CONF_OFFSET,
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90 offsetof(ngx_http_sub_loc_conf_t, once),
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91 NULL },
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92
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93 ngx_null_command
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94 };
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95
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96
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97 static ngx_http_module_t ngx_http_sub_filter_module_ctx = {
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98 NULL, /* preconfiguration */
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99 ngx_http_sub_filter_init, /* postconfiguration */
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100
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101 NULL, /* create main configuration */
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102 NULL, /* init main configuration */
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103
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104 NULL, /* create server configuration */
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105 NULL, /* merge server configuration */
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106
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107 ngx_http_sub_create_conf, /* create location configuration */
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108 ngx_http_sub_merge_conf /* merge location configuration */
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109 };
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110
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111
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112 ngx_module_t ngx_http_sub_filter_module = {
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113 NGX_MODULE_V1,
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114 &ngx_http_sub_filter_module_ctx, /* module context */
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115 ngx_http_sub_filter_commands, /* module directives */
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116 NGX_HTTP_MODULE, /* module type */
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117 NULL, /* init master */
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118 NULL, /* init module */
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119 NULL, /* init process */
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120 NULL, /* init thread */
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121 NULL, /* exit thread */
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122 NULL, /* exit process */
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123 NULL, /* exit master */
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124 NGX_MODULE_V1_PADDING
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125 };
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126
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127
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128 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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129 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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130
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131
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132 static ngx_int_t
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133 ngx_http_sub_header_filter(ngx_http_request_t *r)
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134 {
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135 ngx_str_t *type;
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136 ngx_uint_t i;
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137 ngx_http_sub_ctx_t *ctx;
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138 ngx_http_sub_loc_conf_t *slcf;
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139
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140 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module);
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141
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142 if (slcf->match.len == 0
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143 || r->headers_out.content_type.len == 0
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144 || r->headers_out.content_length_n == 0)
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145 {
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146 return ngx_http_next_header_filter(r);
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147 }
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148
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149 type = slcf->types->elts;
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150 for (i = 0; i < slcf->types->nelts; i++) {
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151 if (r->headers_out.content_type.len >= type[i].len
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152 && ngx_strncasecmp(r->headers_out.content_type.data,
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153 type[i].data, type[i].len) == 0)
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154 {
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155 goto found;
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156 }
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157 }
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158
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159 return ngx_http_next_header_filter(r);
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160
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161 found:
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162
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163 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_ctx_t));
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164 if (ctx == NULL) {
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165 return NGX_ERROR;
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166 }
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167
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168 ngx_http_set_ctx(r, ctx, ngx_http_sub_filter_module);
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169
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170 ctx->match = slcf->match;
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171 ctx->last_out = &ctx->out;
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172 ctx->sub = slcf->sub;
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173
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174 r->filter_need_in_memory = 1;
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175
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176 if (r == r->main) {
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177 ngx_http_clear_content_length(r);
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178 ngx_http_clear_last_modified(r);
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179 }
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180
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181 return ngx_http_next_header_filter(r);
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182 }
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183
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184
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185 static ngx_int_t
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186 ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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187 {
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188 ngx_int_t rc;
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189 ngx_buf_t *b;
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190 ngx_chain_t *cl;
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191 ngx_http_sub_ctx_t *ctx;
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192 ngx_http_sub_loc_conf_t *slcf;
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193
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194 ctx = ngx_http_get_module_ctx(r, ngx_http_sub_filter_module);
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195
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196 if (ctx == NULL) {
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197 return ngx_http_next_body_filter(r, in);
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198 }
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199
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200 if ((in == NULL
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201 && ctx->buf == NULL
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202 && ctx->in == NULL
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203 && ctx->busy == NULL))
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204 {
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205 return ngx_http_next_body_filter(r, in);
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206 }
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207
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208 if (ctx->once && (ctx->buf == NULL || ctx->in == NULL)) {
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209
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210 if (ctx->busy) {
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211 if (ngx_http_sub_output(r, ctx) == NGX_ERROR) {
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212 return NGX_ERROR;
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213 }
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214 }
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215
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216 return ngx_http_next_body_filter(r, in);
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217 }
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218
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219 /* add the incoming chain to the chain ctx->in */
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220
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221 if (in) {
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222 if (ngx_chain_add_copy(r->pool, &ctx->in, in) == NGX_ERROR) {
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223 return NGX_ERROR;
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224 }
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225 }
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226
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227 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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228 "http sub filter \"%V\"", &r->uri);
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229
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230 while (ctx->in || ctx->buf) {
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231
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232 if (ctx->buf == NULL ){
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233 ctx->buf = ctx->in->buf;
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234 ctx->in = ctx->in->next;
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235 ctx->pos = ctx->buf->pos;
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236 }
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237
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238 if (ctx->state == sub_start_state) {
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239 ctx->copy_start = ctx->pos;
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240 ctx->copy_end = ctx->pos;
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241 }
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242
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243 b = NULL;
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244
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245 while (ctx->pos < ctx->buf->last) {
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246
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247 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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248 "saved: %d state: %d", ctx->saved, ctx->state);
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249
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250 rc = ngx_http_sub_parse(r, ctx);
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251
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252 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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253 "parse: %d, looked: %d %p-%p",
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254 rc, ctx->looked, ctx->copy_start, ctx->copy_end);
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255
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256 if (rc == NGX_ERROR) {
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257 return rc;
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258 }
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259
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260 if (ctx->copy_start != ctx->copy_end) {
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261
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262 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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263 "saved: %d", ctx->saved);
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264
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265 if (ctx->saved) {
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266
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267 if (ctx->free) {
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268 cl = ctx->free;
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269 ctx->free = ctx->free->next;
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270 b = cl->buf;
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271 ngx_memzero(b, sizeof(ngx_buf_t));
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272
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273 } else {
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274 b = ngx_calloc_buf(r->pool);
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275 if (b == NULL) {
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276 return NGX_ERROR;
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277 }
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278
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279 cl = ngx_alloc_chain_link(r->pool);
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280 if (cl == NULL) {
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281 return NGX_ERROR;
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282 }
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283
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284 cl->buf = b;
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285 }
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286
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287 b->memory = 1;
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288 b->pos = ctx->match.data;
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289 b->last = ctx->match.data + ctx->saved;
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290
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291 *ctx->last_out = cl;
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292 ctx->last_out = &cl->next;
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293
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294 ctx->saved = 0;
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295 }
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296
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297 if (ctx->free) {
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298 cl = ctx->free;
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299 ctx->free = ctx->free->next;
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300 b = cl->buf;
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301
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302 } else {
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303 b = ngx_alloc_buf(r->pool);
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304 if (b == NULL) {
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305 return NGX_ERROR;
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306 }
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307
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308 cl = ngx_alloc_chain_link(r->pool);
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309 if (cl == NULL) {
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310 return NGX_ERROR;
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311 }
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312
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313 cl->buf = b;
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314 }
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315
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316 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t));
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317
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318 b->pos = ctx->copy_start;
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319 b->last = ctx->copy_end;
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320 b->shadow = NULL;
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321 b->last_buf = 0;
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322 b->recycled = 0;
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323
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324 if (b->in_file) {
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325 b->file_last = b->file_pos + (b->last - b->start);
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326 b->file_pos += b->pos - b->start;
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327 }
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328
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329 cl->next = NULL;
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330 *ctx->last_out = cl;
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331 ctx->last_out = &cl->next;
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332 }
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333
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334 if (ctx->state == sub_start_state) {
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335 ctx->copy_start = ctx->pos;
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336 ctx->copy_end = ctx->pos;
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337
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338 } else {
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339 ctx->copy_start = NULL;
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340 ctx->copy_end = NULL;
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341 }
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342
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343 if (rc == NGX_AGAIN) {
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344 continue;
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345 }
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346
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347
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348 /* rc == NGX_OK */
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349
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350 b = ngx_calloc_buf(r->pool);
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351 if (b == NULL) {
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352 return NGX_ERROR;
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353 }
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354
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355 cl = ngx_alloc_chain_link(r->pool);
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356 if (cl == NULL) {
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357 return NGX_ERROR;
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358 }
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359
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360 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module);
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361
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362 if (ctx->sub.data == NULL) {
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363
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364 if (ngx_http_script_run(r, &ctx->sub, slcf->sub_lengths->elts,
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365 0, slcf->sub_values->elts)
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366 == NULL)
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367 {
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368 return NGX_ERROR;
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369 }
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370 }
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371
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372 b->memory = 1;
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373 b->pos = ctx->sub.data;
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374 b->last = ctx->sub.data + ctx->sub.len;
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375
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376 cl->buf = b;
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377 cl->next = NULL;
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378 *ctx->last_out = cl;
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379 ctx->last_out = &cl->next;
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380
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381 ctx->once = slcf->once;
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382
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383 continue;
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384 }
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385
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386 if (ctx->buf->last_buf || ngx_buf_in_memory(ctx->buf)) {
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387 if (b == NULL) {
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388 if (ctx->free) {
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389 cl = ctx->free;
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390 ctx->free = ctx->free->next;
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391 b = cl->buf;
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392 ngx_memzero(b, sizeof(ngx_buf_t));
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393
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394 } else {
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395 b = ngx_calloc_buf(r->pool);
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396 if (b == NULL) {
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397 return NGX_ERROR;
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398 }
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399
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400 cl = ngx_alloc_chain_link(r->pool);
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401 if (cl == NULL) {
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402 return NGX_ERROR;
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403 }
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404
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405 cl->buf = b;
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406 }
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407
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408 b->sync = 1;
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409
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410 cl->next = NULL;
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411 *ctx->last_out = cl;
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412 ctx->last_out = &cl->next;
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413 }
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414
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415 b->last_buf = ctx->buf->last_buf;
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416 b->shadow = ctx->buf;
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417
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418 b->recycled = ctx->buf->recycled;
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419 }
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420
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421 ctx->buf = NULL;
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422
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423 ctx->saved = ctx->looked;
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424 }
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425
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426 if (ctx->out == NULL && ctx->busy == NULL) {
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|
427 return NGX_OK;
|
|
|
428 }
|
|
|
429
|
|
|
430 return ngx_http_sub_output(r, ctx);
|
|
|
431 }
|
|
|
432
|
|
|
433
|
|
|
434 static ngx_int_t
|
|
|
435 ngx_http_sub_output(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx)
|
|
|
436 {
|
|
|
437 ngx_int_t rc;
|
|
|
438 ngx_buf_t *b;
|
|
|
439 ngx_chain_t *cl;
|
|
|
440
|
|
|
441 #if 1
|
|
|
442 b = NULL;
|
|
|
443 for (cl = ctx->out; cl; cl = cl->next) {
|
|
|
444 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
445 "sub out: %p %p", cl->buf, cl->buf->pos);
|
|
|
446 if (cl->buf == b) {
|
|
|
447 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
448 "the same buf was used in sub");
|
|
|
449 ngx_debug_point();
|
|
|
450 return NGX_ERROR;
|
|
|
451 }
|
|
|
452 b = cl->buf;
|
|
|
453 }
|
|
|
454 #endif
|
|
|
455
|
|
|
456 rc = ngx_http_next_body_filter(r, ctx->out);
|
|
|
457
|
|
|
458 if (ctx->busy == NULL) {
|
|
|
459 ctx->busy = ctx->out;
|
|
|
460
|
|
|
461 } else {
|
|
|
462 for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ }
|
|
|
463 cl->next = ctx->out;
|
|
|
464 }
|
|
|
465
|
|
|
466 ctx->out = NULL;
|
|
|
467 ctx->last_out = &ctx->out;
|
|
|
468
|
|
|
469 while (ctx->busy) {
|
|
|
470
|
|
|
471 cl = ctx->busy;
|
|
|
472 b = cl->buf;
|
|
|
473
|
|
|
474 if (ngx_buf_size(b) != 0) {
|
|
|
475 break;
|
|
|
476 }
|
|
|
477
|
|
|
478 #if (NGX_HAVE_WRITE_ZEROCOPY)
|
|
|
479 if (b->zerocopy_busy) {
|
|
|
480 break;
|
|
|
481 }
|
|
|
482 #endif
|
|
|
483
|
|
|
484 if (b->shadow) {
|
|
|
485 b->shadow->pos = b->shadow->last;
|
|
|
486 }
|
|
|
487
|
|
|
488 ctx->busy = cl->next;
|
|
|
489
|
|
|
490 if (ngx_buf_in_memory(b) || b->in_file) {
|
|
|
491 /* add data bufs only to the free buf chain */
|
|
|
492
|
|
|
493 cl->next = ctx->free;
|
|
|
494 ctx->free = cl;
|
|
|
495 }
|
|
|
496 }
|
|
|
497
|
|
|
498 if (ctx->in || ctx->buf) {
|
|
|
499 r->buffered |= NGX_HTTP_SUB_BUFFERED;
|
|
|
500
|
|
|
501 } else {
|
|
|
502 r->buffered &= ~NGX_HTTP_SUB_BUFFERED;
|
|
|
503 }
|
|
|
504
|
|
|
505 return rc;
|
|
|
506 }
|
|
|
507
|
|
|
508
|
|
|
509 static ngx_int_t
|
|
|
510 ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx)
|
|
|
511 {
|
|
|
512 u_char *p, *last, *copy_end, ch, match;
|
|
|
513 size_t looked;
|
|
|
514 ngx_http_sub_state_e state;
|
|
|
515
|
|
|
516 if (ctx->once) {
|
|
|
517 ctx->copy_start = ctx->pos;
|
|
|
518 ctx->copy_end = ctx->buf->last;
|
|
|
519 ctx->pos = ctx->buf->last;
|
|
|
520 ctx->looked = 0;
|
|
|
521
|
|
|
522 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "once");
|
|
|
523
|
|
|
524 return NGX_AGAIN;
|
|
|
525 }
|
|
|
526
|
|
|
527 state = ctx->state;
|
|
|
528 looked = ctx->looked;
|
|
|
529 last = ctx->buf->last;
|
|
|
530 copy_end = ctx->copy_end;
|
|
|
531
|
|
|
532 for (p = ctx->pos; p < last; p++) {
|
|
|
533
|
|
|
534 ch = *p;
|
|
|
535 ch = ngx_tolower(ch);
|
|
|
536
|
|
|
537 if (state == sub_start_state) {
|
|
|
538
|
|
|
539 /* the tight loop */
|
|
|
540
|
|
|
541 match = ctx->match.data[0];
|
|
|
542
|
|
|
543 for ( ;; ) {
|
|
|
544 if (ch == match) {
|
|
|
545 copy_end = p;
|
|
|
546 looked = 1;
|
|
|
547 state = sub_match_state;
|
|
|
548
|
|
|
549 goto match_started;
|
|
|
550 }
|
|
|
551
|
|
|
552 if (++p == last) {
|
|
|
553 break;
|
|
|
554 }
|
|
|
555
|
|
|
556 ch = *p;
|
|
|
557 ch = ngx_tolower(ch);
|
|
|
558 }
|
|
|
559
|
|
|
560 ctx->pos = p;
|
|
|
561 ctx->looked = looked;
|
|
|
562 ctx->copy_end = p;
|
|
|
563
|
|
|
564 if (ctx->copy_start == NULL) {
|
|
|
565 ctx->copy_start = ctx->buf->pos;
|
|
|
566 }
|
|
|
567
|
|
|
568 return NGX_AGAIN;
|
|
|
569
|
|
|
570 match_started:
|
|
|
571
|
|
|
572 continue;
|
|
|
573 }
|
|
|
574
|
|
|
575 /* state == sub_match_state */
|
|
|
576
|
|
|
577 if (ch == ctx->match.data[looked]) {
|
|
|
578 looked++;
|
|
|
579
|
|
|
580 if (looked == ctx->match.len) {
|
|
|
581 ctx->state = sub_start_state;
|
|
|
582 ctx->pos = p + 1;
|
|
|
583 ctx->looked = looked;
|
|
|
584 ctx->copy_end = copy_end;
|
|
|
585
|
|
|
586 if (ctx->copy_start == NULL && copy_end) {
|
|
|
587 ctx->copy_start = ctx->buf->pos;
|
|
|
588 }
|
|
|
589
|
|
|
590 return NGX_OK;
|
|
|
591 }
|
|
|
592
|
|
|
593 } else if (ch == ctx->match.data[0]) {
|
|
|
594 copy_end = p;
|
|
|
595 looked = 1;
|
|
|
596
|
|
|
597 } else {
|
|
|
598 copy_end = p;
|
|
|
599 looked = 0;
|
|
|
600 state = sub_start_state;
|
|
|
601 }
|
|
|
602 }
|
|
|
603
|
|
|
604 ctx->state = state;
|
|
|
605 ctx->pos = p;
|
|
|
606 ctx->looked = looked;
|
|
|
607
|
|
|
608 ctx->copy_end = (state == sub_start_state) ? p : copy_end;
|
|
|
609
|
|
|
610 if (ctx->copy_start == NULL && ctx->copy_end) {
|
|
|
611 ctx->copy_start = ctx->buf->pos;
|
|
|
612 }
|
|
|
613
|
|
|
614 return NGX_AGAIN;
|
|
|
615 }
|
|
|
616
|
|
|
617
|
|
|
618 static char *
|
|
|
619 ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
620 {
|
|
|
621 ngx_http_sub_loc_conf_t *slcf = conf;
|
|
|
622
|
|
|
623 ngx_str_t *value;
|
|
|
624 ngx_int_t n;
|
|
|
625 ngx_uint_t i;
|
|
|
626 ngx_http_script_compile_t sc;
|
|
|
627
|
|
|
628 if (slcf->match.len) {
|
|
|
629 return "is duplicate";
|
|
|
630 }
|
|
|
631
|
|
|
632 value = cf->args->elts;
|
|
|
633
|
|
|
634 slcf->match = value[1];
|
|
|
635
|
|
|
636 for (i = 0; i < value[1].len; i++) {
|
|
|
637 value[1].data[i] = ngx_tolower(value[1].data[i]);
|
|
|
638 }
|
|
|
639
|
|
|
640 n = ngx_http_script_variables_count(&value[2]);
|
|
|
641
|
|
|
642 if (n == 0) {
|
|
|
643 slcf->sub = value[2];
|
|
|
644 return NGX_CONF_OK;
|
|
|
645 }
|
|
|
646
|
|
|
647 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
|
648
|
|
|
649 sc.cf = cf;
|
|
|
650 sc.source = &value[2];
|
|
|
651 sc.lengths = &slcf->sub_lengths;
|
|
|
652 sc.values = &slcf->sub_values;
|
|
|
653 sc.variables = n;
|
|
|
654 sc.complete_lengths = 1;
|
|
|
655 sc.complete_values = 1;
|
|
|
656
|
|
|
657 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
658 return NGX_CONF_ERROR;
|
|
|
659 }
|
|
|
660
|
|
|
661 return NGX_CONF_OK;
|
|
|
662 }
|
|
|
663
|
|
|
664
|
|
|
665 static char *
|
|
|
666 ngx_http_sub_types(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
667 {
|
|
|
668 ngx_http_sub_loc_conf_t *slcf = conf;
|
|
|
669
|
|
|
670 ngx_str_t *value, *type;
|
|
|
671 ngx_uint_t i;
|
|
|
672
|
|
|
673 if (slcf->types == NULL) {
|
|
|
674 slcf->types = ngx_array_create(cf->pool, 4, sizeof(ngx_str_t));
|
|
|
675 if (slcf->types == NULL) {
|
|
|
676 return NGX_CONF_ERROR;
|
|
|
677 }
|
|
|
678
|
|
|
679 type = ngx_array_push(slcf->types);
|
|
|
680 if (type == NULL) {
|
|
|
681 return NGX_CONF_ERROR;
|
|
|
682 }
|
|
|
683
|
|
|
684 type->len = sizeof("text/html") - 1;
|
|
|
685 type->data = (u_char *) "text/html";
|
|
|
686 }
|
|
|
687
|
|
|
688 value = cf->args->elts;
|
|
|
689
|
|
|
690 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
691
|
|
|
692 if (ngx_strcmp(value[i].data, "text/html") == 0) {
|
|
|
693 continue;
|
|
|
694 }
|
|
|
695
|
|
|
696 type = ngx_array_push(slcf->types);
|
|
|
697 if (type == NULL) {
|
|
|
698 return NGX_CONF_ERROR;
|
|
|
699 }
|
|
|
700
|
|
|
701 type->len = value[i].len;
|
|
|
702
|
|
|
703 type->data = ngx_palloc(cf->pool, type->len + 1);
|
|
|
704 if (type->data == NULL) {
|
|
|
705 return NGX_CONF_ERROR;
|
|
|
706 }
|
|
|
707
|
|
|
708 ngx_cpystrn(type->data, value[i].data, type->len + 1);
|
|
|
709 }
|
|
|
710
|
|
|
711 return NGX_CONF_OK;
|
|
|
712 }
|
|
|
713
|
|
|
714
|
|
|
715 static void *
|
|
|
716 ngx_http_sub_create_conf(ngx_conf_t *cf)
|
|
|
717 {
|
|
|
718 ngx_http_sub_loc_conf_t *slcf;
|
|
|
719
|
|
|
720 slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sub_loc_conf_t));
|
|
|
721 if (slcf == NULL) {
|
|
|
722 return NGX_CONF_ERROR;
|
|
|
723 }
|
|
|
724
|
|
|
725 /*
|
|
|
726 * set by ngx_pcalloc():
|
|
|
727 *
|
|
|
728 * conf->match.len = 0;
|
|
|
729 * conf->match.data = NULL;
|
|
|
730 * conf->sub.len = 0;
|
|
|
731 * conf->sub.data = NULL;
|
|
|
732 * conf->sub_lengths = NULL;
|
|
|
733 * conf->sub_values = NULL;
|
|
|
734 * conf->types = NULL;
|
|
|
735 */
|
|
|
736
|
|
|
737 slcf->once = NGX_CONF_UNSET;
|
|
|
738
|
|
|
739 return slcf;
|
|
|
740 }
|
|
|
741
|
|
|
742
|
|
|
743 static char *
|
|
|
744 ngx_http_sub_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
745 {
|
|
|
746 ngx_http_sub_loc_conf_t *prev = parent;
|
|
|
747 ngx_http_sub_loc_conf_t *conf = child;
|
|
|
748
|
|
|
749 ngx_str_t *type;
|
|
|
750
|
|
|
751 ngx_conf_merge_value(conf->once, prev->once, 1);
|
|
|
752 ngx_conf_merge_str_value(conf->match, prev->match, "");
|
|
|
753
|
|
|
754 if (conf->sub.data == NULL && conf->sub_lengths == NULL) {
|
|
|
755 conf->sub = prev->sub;
|
|
|
756 conf->sub_lengths = prev->sub_lengths;
|
|
|
757 conf->sub_values = prev->sub_values;
|
|
|
758 }
|
|
|
759
|
|
|
760 if (conf->types == NULL) {
|
|
|
761 if (prev->types == NULL) {
|
|
|
762 conf->types = ngx_array_create(cf->pool, 1, sizeof(ngx_str_t));
|
|
|
763 if (conf->types == NULL) {
|
|
|
764 return NGX_CONF_ERROR;
|
|
|
765 }
|
|
|
766
|
|
|
767 type = ngx_array_push(conf->types);
|
|
|
768 if (type == NULL) {
|
|
|
769 return NGX_CONF_ERROR;
|
|
|
770 }
|
|
|
771
|
|
|
772 type->len = sizeof("text/html") - 1;
|
|
|
773 type->data = (u_char *) "text/html";
|
|
|
774
|
|
|
775 } else {
|
|
|
776 conf->types = prev->types;
|
|
|
777 }
|
|
|
778 }
|
|
|
779
|
|
|
780 return NGX_CONF_OK;
|
|
|
781 }
|
|
|
782
|
|
|
783
|
|
|
784 static ngx_int_t
|
|
|
785 ngx_http_sub_filter_init(ngx_conf_t *cf)
|
|
|
786 {
|
|
|
787 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
788 ngx_http_top_header_filter = ngx_http_sub_header_filter;
|
|
|
789
|
|
|
790 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
791 ngx_http_top_body_filter = ngx_http_sub_body_filter;
|
|
|
792
|
|
|
793 return NGX_OK;
|
|
|
794 }
|
