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46
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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 #define NGX_HTTP_SSI_MAX_PARAMS 16
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12
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13 #define NGX_HTTP_SSI_COMMAND_LEN 31
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14 #define NGX_HTTP_SSI_PARAM_LEN 31
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15 #define NGX_HTTP_SSI_PARAMS_N 4
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16
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17 #define NGX_HTTP_SSI_ERROR 1
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18
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19
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20 typedef struct {
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21 ngx_flag_t enable;
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22 ngx_flag_t silent_errors;
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23
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24 size_t min_file_chunk;
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25 size_t value_len;
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26 } ngx_http_ssi_conf_t;
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27
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28
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29 typedef struct {
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30 ngx_buf_t *buf;
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31
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32 u_char *pos;
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33 u_char *copy_start;
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34 u_char *copy_end;
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35
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36 ngx_str_t command;
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37 ngx_array_t params;
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38 ngx_table_elt_t *param;
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39 ngx_table_elt_t params_array[NGX_HTTP_SSI_PARAMS_N];
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40
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41 ngx_chain_t *in;
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42 ngx_chain_t *out;
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43 ngx_chain_t **last_out;
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44
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45 ngx_uint_t state;
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46 ngx_uint_t saved_state;
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47 size_t saved;
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48 size_t looked;
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49
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50 size_t value_len;
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51 } ngx_http_ssi_ctx_t;
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52
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53
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54 typedef ngx_int_t (*ngx_http_ssi_command_pt) (ngx_http_request_t *r,
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55 ngx_http_ssi_ctx_t *ctx, ngx_str_t **);
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56
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57
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58 typedef struct {
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59 ngx_str_t name;
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60 ngx_uint_t index;
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61
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62 ngx_uint_t mandatory;
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63 } ngx_http_ssi_param_t;
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64
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65
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66 typedef struct {
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67 ngx_str_t name;
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68 ngx_http_ssi_command_pt handler;
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69 ngx_http_ssi_param_t *params;
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70
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71 ngx_uint_t flush; /* unsigned flush:1; */
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72 } ngx_http_ssi_command_t;
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73
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74
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75 typedef enum {
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76 ssi_start_state = 0,
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77 ssi_tag_state,
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78 ssi_comment0_state,
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79 ssi_comment1_state,
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80 ssi_sharp_state,
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81 ssi_precommand_state,
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82 ssi_command_state,
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83 ssi_preparam_state,
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84 ssi_param_state,
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85 ssi_preequal_state,
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86 ssi_prevalue_state,
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87 ssi_double_quoted_value_state,
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88 ssi_quoted_value_state,
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89 ssi_quoted_symbol_state,
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90 ssi_postparam_state,
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91 ssi_comment_end0_state,
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92 ssi_comment_end1_state,
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93 ssi_error_state,
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94 ssi_error_end0_state,
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95 ssi_error_end1_state
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96 } ngx_http_ssi_state_e;
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97
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98
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99 static ngx_int_t ngx_http_ssi_error(ngx_http_request_t *r,
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100 ngx_http_ssi_ctx_t *ctx);
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101 static ngx_int_t ngx_http_ssi_parse(ngx_http_request_t *r,
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102 ngx_http_ssi_ctx_t *ctx);
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103
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104 static ngx_int_t ngx_http_ssi_echo(ngx_http_request_t *r,
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105 ngx_http_ssi_ctx_t *ctx, ngx_str_t **params);
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106
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107 static void *ngx_http_ssi_create_conf(ngx_conf_t *cf);
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108 static char *ngx_http_ssi_merge_conf(ngx_conf_t *cf,
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109 void *parent, void *child);
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110 static ngx_int_t ngx_http_ssi_filter_init(ngx_cycle_t *cycle);
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111
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112
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113 static ngx_command_t ngx_http_ssi_filter_commands[] = {
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114
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115 { ngx_string("ssi"),
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116 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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117 ngx_conf_set_flag_slot,
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118 NGX_HTTP_LOC_CONF_OFFSET,
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119 offsetof(ngx_http_ssi_conf_t, enable),
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120 NULL },
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121
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122 { ngx_string("ssi_silent_errors"),
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123 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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124 ngx_conf_set_flag_slot,
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125 NGX_HTTP_LOC_CONF_OFFSET,
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126 offsetof(ngx_http_ssi_conf_t, silent_errors),
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127 NULL },
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128
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129 { ngx_string("ssi_min_file_chunk"),
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130 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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131 ngx_conf_set_size_slot,
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132 NGX_HTTP_LOC_CONF_OFFSET,
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133 offsetof(ngx_http_ssi_conf_t, min_file_chunk),
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134 NULL },
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135
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136 ngx_null_command
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137 };
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138
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139
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140
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141 static ngx_http_module_t ngx_http_ssi_filter_module_ctx = {
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142 NULL, /* pre conf */
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143
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144 NULL, /* create main configuration */
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145 NULL, /* init main configuration */
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146
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147 NULL, /* create server configuration */
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148 NULL, /* merge server configuration */
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149
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150 ngx_http_ssi_create_conf, /* create location configuration */
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151 ngx_http_ssi_merge_conf /* merge location configuration */
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152 };
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153
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154
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155 ngx_module_t ngx_http_ssi_filter_module = {
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156 NGX_MODULE,
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157 &ngx_http_ssi_filter_module_ctx, /* module context */
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158 ngx_http_ssi_filter_commands, /* module directives */
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159 NGX_HTTP_MODULE, /* module type */
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160 ngx_http_ssi_filter_init, /* init module */
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161 NULL /* init child */
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162 };
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163
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164
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165 static ngx_int_t (*ngx_http_next_header_filter) (ngx_http_request_t *r);
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166 static ngx_int_t (*ngx_http_next_body_filter) (ngx_http_request_t *r,
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167 ngx_chain_t *in);
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168
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169
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170 static u_char ngx_http_ssi_string[] = "<!--";
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171 static u_char ngx_http_ssi_error_string[] =
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172 "[an error occurred while processing the directive]";
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173
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174 static ngx_str_t ngx_http_ssi_none = ngx_string("(none)");
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175
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176
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177 #define NGX_HTTP_SSI_ECHO_VAR 0
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178 #define NGX_HTTP_SSI_ECHO_DEFAULT 1
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179
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180 static ngx_http_ssi_param_t ngx_http_ssi_echo_params[] = {
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181 { ngx_string("var"), NGX_HTTP_SSI_ECHO_VAR, 1 },
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182 { ngx_string("default"), NGX_HTTP_SSI_ECHO_DEFAULT, 0 },
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183 { ngx_null_string, 0, 0 }
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184 };
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185
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186
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187 static ngx_http_ssi_command_t ngx_http_ssi_commands[] = {
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188 { ngx_string("echo"), ngx_http_ssi_echo, ngx_http_ssi_echo_params, 0 },
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189 { ngx_null_string, NULL, NULL, 0 }
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190 };
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191
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192
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193 static ngx_int_t
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194 ngx_http_ssi_header_filter(ngx_http_request_t *r)
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195 {
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196 ngx_http_ssi_ctx_t *ctx;
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197 ngx_http_ssi_conf_t *conf;
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198
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199 conf = ngx_http_get_module_loc_conf(r, ngx_http_ssi_filter_module);
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200
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201 if (!conf->enable) {
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202 return ngx_http_next_header_filter(r);
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203 }
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204
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205 /* TODO: "text/html" -> custom types */
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206
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207 if (r->headers_out.content_type
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208 && ngx_strncasecmp(r->headers_out.content_type->value.data,
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209 "text/html", 5) != 0)
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210 {
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211 return ngx_http_next_header_filter(r);
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212 }
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213
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214
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215 if (!(ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_ssi_ctx_t)))) {
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216 return NGX_ERROR;
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217 }
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218
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219 ngx_http_set_ctx(r, ctx, ngx_http_ssi_filter_module);
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220
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221
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222 ctx->value_len = conf->value_len;
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223 ctx->last_out = &ctx->out;
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224
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225 ctx->params.elts = ctx->params_array;
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226 ctx->params.size = sizeof(ngx_table_elt_t);
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227 ctx->params.nalloc = NGX_HTTP_SSI_PARAMS_N;
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228 ctx->params.pool = r->pool;
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229
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230 r->headers_out.content_length_n = -1;
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231 if (r->headers_out.content_length) {
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232 r->headers_out.content_length->key.len = 0;
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233 r->headers_out.content_length = NULL;
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234 }
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235
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236 r->headers_out.last_modified_time = -1;
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237 if (r->headers_out.last_modified) {
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238 r->headers_out.last_modified->key.len = 0;
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239 r->headers_out.last_modified = NULL;
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240 }
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241
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242 r->filter_need_in_memory = 1;
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243 r->filter_ssi_need_in_memory = 1;
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244
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245 return ngx_http_next_header_filter(r);
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246 }
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247
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248
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249 static ngx_int_t
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250 ngx_http_ssi_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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251 {
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252 ngx_int_t rc;
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253 ngx_uint_t i;
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254 ngx_buf_t *b;
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255 ngx_chain_t *cl;
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256 ngx_table_elt_t *param;
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257 ngx_http_ssi_ctx_t *ctx;
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258 ngx_http_ssi_conf_t *conf;
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259 ngx_http_ssi_param_t *prm;
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260 ngx_http_ssi_command_t *cmd;
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261 ngx_str_t *params[NGX_HTTP_SSI_MAX_PARAMS];
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262
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263 ctx = ngx_http_get_module_ctx(r, ngx_http_ssi_filter_module);
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264
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265 if (ctx == NULL || (in == NULL && ctx->in == NULL)) {
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266 return ngx_http_next_body_filter(r, in);
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267 }
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268
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269 /* add the incoming chain to the chain ctx->in */
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270
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271 if (in) {
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272 if (ngx_chain_add_copy(r->pool, &ctx->in, in) == NGX_ERROR) {
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273 return NGX_ERROR;
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274 }
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275 }
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276
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277 conf = ngx_http_get_module_loc_conf(r, ngx_http_ssi_filter_module);
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278
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279 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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280 "http ssi filter");
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281
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282 b = NULL;
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283
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284 while (ctx->in) {
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285
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286 ctx->buf = ctx->in->buf;
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287 ctx->in = ctx->in->next;
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288 ctx->pos = ctx->buf->pos;
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289
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290 if (ctx->state == ssi_start_state) {
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291 ctx->copy_start = ctx->pos;
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292 ctx->copy_end = ctx->pos;
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293 }
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294
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295 while (ctx->pos < ctx->buf->last) {
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296
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297 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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298 "saved: %d state: %d", ctx->saved, ctx->state);
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299
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300 rc = ngx_http_ssi_parse(r, ctx);
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301
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302 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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303 "parse: %d, looked: %d %p-%p",
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304 rc, ctx->looked, ctx->copy_start, ctx->copy_end);
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305
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306 if (rc == NGX_ERROR) {
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307 return rc;
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308 }
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309
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310 if (ctx->copy_start != ctx->copy_end) {
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311
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312 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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313 "saved: %d", ctx->saved);
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314
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315 if (ctx->saved) {
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316 if (!(b = ngx_calloc_buf(r->pool))) {
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317 return NGX_ERROR;
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318 }
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319
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320 b->memory = 1;
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321 b->pos = ngx_http_ssi_string;
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322 b->last = ngx_http_ssi_string + ctx->saved;
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323
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324 if (!(cl = ngx_alloc_chain_link(r->pool))) {
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325 return NGX_ERROR;
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326 }
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327
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328 cl->buf = b;
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329 *ctx->last_out = cl;
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330 ctx->last_out = &cl->next;
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331
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332 ctx->saved = 0;
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333 }
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334
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335 if (!(b = ngx_calloc_buf(r->pool))) {
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336 return NGX_ERROR;
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337 }
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338
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339 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t));
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340
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341 b->last_buf = 0;
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342 b->pos = ctx->copy_start;
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343 b->last = ctx->copy_end;
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344
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345 if (b->in_file) {
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346
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347 if (conf->min_file_chunk < (size_t) (b->last - b->pos)) {
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348 b->file_last = b->file_pos + (b->last - b->start);
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349 b->file_pos += b->pos - b->start;
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350
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351 } else {
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352 b->in_file = 0;
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353 }
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354 }
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355
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356 if (!(cl = ngx_alloc_chain_link(r->pool))) {
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357 return NGX_ERROR;
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358 }
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359
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360 cl->buf = b;
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361 cl->next = NULL;
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362 *ctx->last_out = cl;
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363 ctx->last_out = &cl->next;
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364 }
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365
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366 if (ctx->state == ssi_start_state) {
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367 ctx->copy_start = ctx->pos;
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368 ctx->copy_end = ctx->pos;
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369
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370 } else {
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371 ctx->copy_start = NULL;
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372 ctx->copy_end = NULL;
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373 }
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374
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375 if (rc == NGX_AGAIN) {
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376 continue;
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377 }
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378
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379
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380 if (rc == NGX_OK) {
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381
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382 for (cmd = ngx_http_ssi_commands; cmd->handler; cmd++) {
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383 if (cmd->name.len == 0) {
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384 cmd = (ngx_http_ssi_command_t *) cmd->handler;
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385 }
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386
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387 if (cmd->name.len != ctx->command.len
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388 || ngx_strncmp(cmd->name.data, ctx->command.data,
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389 ctx->command.len) != 0)
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390 {
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391 continue;
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392 }
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393
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394 break;
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395 }
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396
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397 if (cmd->name.len == 0) {
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398 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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399 "invalid SSI command: \"%V\"", &ctx->command);
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400 goto ssi_error;
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401 }
|
|
|
402
|
|
|
403 ngx_memzero(params,
|
|
|
404 NGX_HTTP_SSI_MAX_PARAMS * sizeof(ngx_str_t *));
|
|
|
405
|
|
|
406 param = ctx->params.elts;
|
|
|
407
|
|
|
408
|
|
|
409 for (i = 0; i < ctx->params.nelts; i++) {
|
|
|
410
|
|
|
411 for (prm = cmd->params; prm->name.len; prm++) {
|
|
|
412
|
|
|
413 if (param[i].key.len != prm->name.len
|
|
|
414 || ngx_strncmp(param[i].key.data, prm->name.data,
|
|
|
415 prm->name.len) != 0)
|
|
|
416 {
|
|
|
417 continue;
|
|
|
418 }
|
|
|
419
|
|
|
420 if (params[prm->index]) {
|
|
|
421 ngx_log_error(NGX_LOG_ERR,
|
|
|
422 r->connection->log, 0,
|
|
|
423 "duplicate \"%V\" parameter "
|
|
|
424 "in \"%V\" SSI command",
|
|
|
425 ¶m[i].key, &ctx->command);
|
|
|
426
|
|
|
427 goto ssi_error;
|
|
|
428 }
|
|
|
429
|
|
|
430 params[prm->index] = ¶m[i].value;
|
|
|
431
|
|
|
432 break;
|
|
|
433 }
|
|
|
434
|
|
|
435 if (prm->name.len == 0) {
|
|
|
436 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
437 "invalid parameter name: \"%V\" "
|
|
|
438 "in \"%V\" SSI command",
|
|
|
439 ¶m[i].key, &ctx->command);
|
|
|
440
|
|
|
441 goto ssi_error;
|
|
|
442 }
|
|
|
443 }
|
|
|
444
|
|
|
445 for (prm = cmd->params; prm->name.len; prm++) {
|
|
|
446 if (prm->mandatory && params[prm->index] == 0) {
|
|
|
447 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
448 "mandatory \"%V\" parameter is absent "
|
|
|
449 "in \"%V\" SSI command",
|
|
|
450 &prm->name, &ctx->command);
|
|
|
451
|
|
|
452 goto ssi_error;
|
|
|
453 }
|
|
|
454 }
|
|
|
455
|
|
|
456 if (cmd->handler(r, ctx, params) == NGX_OK) {
|
|
|
457 continue;
|
|
|
458 }
|
|
|
459 }
|
|
|
460
|
|
|
461
|
|
|
462 /* rc == NGX_HTTP_SSI_ERROR */
|
|
|
463
|
|
|
464 ssi_error:
|
|
|
465
|
|
|
466 if (conf->silent_errors) {
|
|
|
467 continue;
|
|
|
468 }
|
|
|
469
|
|
|
470 if (!(b = ngx_calloc_buf(r->pool))) {
|
|
|
471 return NGX_ERROR;
|
|
|
472 }
|
|
|
473
|
|
|
474 b->memory = 1;
|
|
|
475 b->pos = ngx_http_ssi_error_string;
|
|
|
476 b->last = ngx_http_ssi_error_string
|
|
|
477 + sizeof(ngx_http_ssi_error_string) - 1;
|
|
|
478
|
|
|
479 if (!(cl = ngx_alloc_chain_link(r->pool))) {
|
|
|
480 return NGX_ERROR;
|
|
|
481 }
|
|
|
482
|
|
|
483 cl->buf = b;
|
|
|
484 cl->next = NULL;
|
|
|
485 *ctx->last_out = cl;
|
|
|
486 ctx->last_out = &cl->next;
|
|
|
487
|
|
|
488 continue;
|
|
|
489 }
|
|
|
490
|
|
|
491 ctx->buf->pos = ctx->buf->last;
|
|
|
492
|
|
|
493 if (b && ctx->buf->last_buf) {
|
|
|
494 b->last_buf = 1;
|
|
|
495 }
|
|
|
496
|
|
|
497 ctx->saved = ctx->looked;
|
|
|
498 }
|
|
|
499
|
|
|
500 if (ctx->out == NULL) {
|
|
|
501 return NGX_OK;
|
|
|
502 }
|
|
|
503
|
|
|
504 rc = ngx_http_next_body_filter(r, ctx->out);
|
|
|
505
|
|
|
506 ctx->out = NULL;
|
|
|
507 ctx->last_out = &ctx->out;
|
|
|
508
|
|
|
509 return rc;
|
|
|
510 }
|
|
|
511
|
|
|
512
|
|
|
513 static ngx_int_t
|
|
|
514 ngx_http_ssi_parse(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx)
|
|
|
515 {
|
|
|
516 u_char *p, *last, *copy_end, ch;
|
|
|
517 size_t looked;
|
|
|
518 ngx_http_ssi_state_e state;
|
|
|
519
|
|
|
520 state = ctx->state;
|
|
|
521 looked = ctx->looked;
|
|
|
522 last = ctx->buf->last;
|
|
|
523 copy_end = ctx->copy_end;
|
|
|
524
|
|
|
525 for (p = ctx->pos; p < last; p++) {
|
|
|
526
|
|
|
527 ch = *p;
|
|
|
528
|
|
|
529 if (state == ssi_start_state) {
|
|
|
530
|
|
|
531 /* the tight loop */
|
|
|
532
|
|
|
533 for ( /* void */ ; p < last; ch = *(++p)) {
|
|
|
534 if (ch != '<') {
|
|
|
535 continue;
|
|
|
536 }
|
|
|
537
|
|
|
538 copy_end = p;
|
|
|
539 looked = 1;
|
|
|
540 state = ssi_tag_state;
|
|
|
541
|
|
|
542 goto tag_started;
|
|
|
543 }
|
|
|
544
|
|
|
545 ctx->pos = p;
|
|
|
546 ctx->looked = looked;
|
|
|
547 ctx->copy_end = p;
|
|
|
548
|
|
|
549 if (ctx->copy_start == NULL) {
|
|
|
550 ctx->copy_start = ctx->buf->pos;
|
|
|
551 }
|
|
|
552
|
|
|
553 return NGX_AGAIN;
|
|
|
554
|
|
|
555 tag_started:
|
|
|
556 continue;
|
|
|
557 }
|
|
|
558
|
|
|
559 switch (state) {
|
|
|
560
|
|
|
561 case ssi_start_state:
|
|
|
562 break;
|
|
|
563
|
|
|
564 case ssi_tag_state:
|
|
|
565 switch (ch) {
|
|
|
566 case '!':
|
|
|
567 looked = 2;
|
|
|
568 state = ssi_comment0_state;
|
|
|
569 break;
|
|
|
570
|
|
|
571 case '<':
|
|
|
572 copy_end = p;
|
|
|
573 break;
|
|
|
574
|
|
|
575 default:
|
|
|
576 copy_end = p;
|
|
|
577 looked = 0;
|
|
|
578 state = ssi_start_state;
|
|
|
579 break;
|
|
|
580 }
|
|
|
581
|
|
|
582 break;
|
|
|
583
|
|
|
584 case ssi_comment0_state:
|
|
|
585 switch (ch) {
|
|
|
586 case '-':
|
|
|
587 looked = 3;
|
|
|
588 state = ssi_comment1_state;
|
|
|
589 break;
|
|
|
590
|
|
|
591 case '<':
|
|
|
592 copy_end = p;
|
|
|
593 looked = 1;
|
|
|
594 state = ssi_tag_state;
|
|
|
595 break;
|
|
|
596
|
|
|
597 default:
|
|
|
598 copy_end = p;
|
|
|
599 looked = 0;
|
|
|
600 state = ssi_start_state;
|
|
|
601 break;
|
|
|
602 }
|
|
|
603
|
|
|
604 break;
|
|
|
605
|
|
|
606 case ssi_comment1_state:
|
|
|
607 switch (ch) {
|
|
|
608 case '-':
|
|
|
609 looked = 4;
|
|
|
610 state = ssi_sharp_state;
|
|
|
611 break;
|
|
|
612
|
|
|
613 case '<':
|
|
|
614 copy_end = p;
|
|
|
615 looked = 1;
|
|
|
616 state = ssi_tag_state;
|
|
|
617 break;
|
|
|
618
|
|
|
619 default:
|
|
|
620 copy_end = p;
|
|
|
621 looked = 0;
|
|
|
622 state = ssi_start_state;
|
|
|
623 break;
|
|
|
624 }
|
|
|
625
|
|
|
626 break;
|
|
|
627
|
|
|
628 case ssi_sharp_state:
|
|
|
629 switch (ch) {
|
|
|
630 case '#':
|
|
|
631 if (ctx->copy_start) {
|
|
|
632 ctx->saved = 0;
|
|
|
633 }
|
|
|
634 looked = 0;
|
|
|
635 state = ssi_precommand_state;
|
|
|
636 break;
|
|
|
637
|
|
|
638 case '<':
|
|
|
639 copy_end = p;
|
|
|
640 looked = 1;
|
|
|
641 state = ssi_tag_state;
|
|
|
642 break;
|
|
|
643
|
|
|
644 default:
|
|
|
645 copy_end = p;
|
|
|
646 looked = 0;
|
|
|
647 state = ssi_start_state;
|
|
|
648 break;
|
|
|
649 }
|
|
|
650
|
|
|
651 break;
|
|
|
652
|
|
|
653 case ssi_precommand_state:
|
|
|
654 switch (ch) {
|
|
|
655 case ' ':
|
|
|
656 case CR:
|
|
|
657 case LF:
|
|
|
658 case '\t':
|
|
|
659 break;
|
|
|
660
|
|
|
661 default:
|
|
|
662 ctx->command.len = 1;
|
|
|
663 ctx->command.data = ngx_palloc(r->pool,
|
|
|
664 NGX_HTTP_SSI_COMMAND_LEN + 1);
|
|
|
665 if (ctx->command.data == NULL) {
|
|
|
666 return NGX_ERROR;
|
|
|
667 }
|
|
|
668
|
|
|
669 ctx->command.data[0] = ch;
|
|
|
670 ctx->params.nelts = 0;
|
|
|
671 state = ssi_command_state;
|
|
|
672 break;
|
|
|
673 }
|
|
|
674
|
|
|
675 break;
|
|
|
676
|
|
|
677 case ssi_command_state:
|
|
|
678 switch (ch) {
|
|
|
679 case ' ':
|
|
|
680 case CR:
|
|
|
681 case LF:
|
|
|
682 case '\t':
|
|
|
683 state = ssi_preparam_state;
|
|
|
684 break;
|
|
|
685
|
|
|
686 case '-':
|
|
|
687 state = ssi_comment_end0_state;
|
|
|
688 break;
|
|
|
689
|
|
|
690 default:
|
|
|
691 ctx->command.data[ctx->command.len++] = ch;
|
|
|
692
|
|
|
693 if (ctx->command.len == NGX_HTTP_SSI_COMMAND_LEN) {
|
|
|
694 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
695 "the \"%V\" SSI command is too long",
|
|
|
696 &ctx->command);
|
|
|
697
|
|
|
698 state = ssi_error_state;
|
|
|
699 break;
|
|
|
700 }
|
|
|
701 }
|
|
|
702
|
|
|
703 break;
|
|
|
704
|
|
|
705 case ssi_preparam_state:
|
|
|
706 switch (ch) {
|
|
|
707 case ' ':
|
|
|
708 case CR:
|
|
|
709 case LF:
|
|
|
710 case '\t':
|
|
|
711 break;
|
|
|
712
|
|
|
713 case '-':
|
|
|
714 state = ssi_comment_end0_state;
|
|
|
715 break;
|
|
|
716
|
|
|
717 default:
|
|
|
718 if (!(ctx->param = ngx_array_push(&ctx->params))) {
|
|
|
719 return NGX_ERROR;
|
|
|
720 }
|
|
|
721
|
|
|
722 ctx->param->key.len = 1;
|
|
|
723 ctx->param->key.data = ngx_palloc(r->pool,
|
|
|
724 NGX_HTTP_SSI_PARAM_LEN + 1);
|
|
|
725 if (ctx->param->key.data == NULL) {
|
|
|
726 return NGX_ERROR;
|
|
|
727 }
|
|
|
728
|
|
|
729 ctx->param->key.data[0] = ch;
|
|
|
730
|
|
|
731 ctx->param->value.len = 0;
|
|
|
732 ctx->param->value.data = ngx_palloc(r->pool,
|
|
|
733 ctx->value_len + 1);
|
|
|
734 if (ctx->param->value.data == NULL) {
|
|
|
735 return NGX_ERROR;
|
|
|
736 }
|
|
|
737
|
|
|
738 state = ssi_param_state;
|
|
|
739 break;
|
|
|
740 }
|
|
|
741
|
|
|
742 break;
|
|
|
743
|
|
|
744 case ssi_param_state:
|
|
|
745 switch (ch) {
|
|
|
746 case ' ':
|
|
|
747 case CR:
|
|
|
748 case LF:
|
|
|
749 case '\t':
|
|
|
750 state = ssi_preequal_state;
|
|
|
751 break;
|
|
|
752
|
|
|
753 case '=':
|
|
|
754 state = ssi_prevalue_state;
|
|
|
755 break;
|
|
|
756
|
|
|
757 case '-':
|
|
|
758 state = ssi_error_end0_state;
|
|
|
759
|
|
|
760 ctx->param->key.data[ctx->param->key.len++] = ch;
|
|
|
761 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
762 "invalid \"%V\" parameter in \"%V\" SSI command",
|
|
|
763 &ctx->param->key, &ctx->command);
|
|
|
764 break;
|
|
|
765
|
|
|
766 default:
|
|
|
767 ctx->param->key.data[ctx->param->key.len++] = ch;
|
|
|
768
|
|
|
769 if (ctx->param->key.len == NGX_HTTP_SSI_PARAM_LEN) {
|
|
|
770 state = ssi_error_state;
|
|
|
771 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
772 "too long \"%V\" parameter in "
|
|
|
773 "\"%V\" SSI command",
|
|
|
774 &ctx->param->key, &ctx->command);
|
|
|
775 break;
|
|
|
776 }
|
|
|
777 }
|
|
|
778
|
|
|
779 break;
|
|
|
780
|
|
|
781 case ssi_preequal_state:
|
|
|
782 switch (ch) {
|
|
|
783 case ' ':
|
|
|
784 case CR:
|
|
|
785 case LF:
|
|
|
786 case '\t':
|
|
|
787 break;
|
|
|
788
|
|
|
789 case '=':
|
|
|
790 state = ssi_prevalue_state;
|
|
|
791 break;
|
|
|
792
|
|
|
793 default:
|
|
|
794 if (ch == '-') {
|
|
|
795 state = ssi_error_end0_state;
|
|
|
796 } else {
|
|
|
797 state = ssi_error_state;
|
|
|
798 }
|
|
|
799
|
|
|
800 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
801 "unexpected \"%c\" symbol after \"%V\" "
|
|
|
802 "parameter in \"%V\" SSI command",
|
|
|
803 ch, &ctx->param->key, &ctx->command);
|
|
|
804 break;
|
|
|
805 }
|
|
|
806
|
|
|
807 break;
|
|
|
808
|
|
|
809 case ssi_prevalue_state:
|
|
|
810 switch (ch) {
|
|
|
811 case ' ':
|
|
|
812 case CR:
|
|
|
813 case LF:
|
|
|
814 case '\t':
|
|
|
815 break;
|
|
|
816
|
|
|
817 case '"':
|
|
|
818 state = ssi_double_quoted_value_state;
|
|
|
819 break;
|
|
|
820
|
|
|
821 case '\'':
|
|
|
822 state = ssi_quoted_value_state;
|
|
|
823 break;
|
|
|
824
|
|
|
825 default:
|
|
|
826 if (ch == '-') {
|
|
|
827 state = ssi_error_end0_state;
|
|
|
828 } else {
|
|
|
829 state = ssi_error_state;
|
|
|
830 }
|
|
|
831
|
|
|
832 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
833 "unexpected \"%c\" symbol before value of "
|
|
|
834 "\"%V\" parameter in \"%V\" SSI command",
|
|
|
835 ch, &ctx->param->key, &ctx->command);
|
|
|
836 break;
|
|
|
837 }
|
|
|
838
|
|
|
839 break;
|
|
|
840
|
|
|
841 case ssi_double_quoted_value_state:
|
|
|
842 switch (ch) {
|
|
|
843 case '\\':
|
|
|
844 ctx->saved_state = ssi_double_quoted_value_state;
|
|
|
845 state = ssi_quoted_symbol_state;
|
|
|
846 break;
|
|
|
847
|
|
|
848 case '"':
|
|
|
849 state = ssi_postparam_state;
|
|
|
850 break;
|
|
|
851
|
|
|
852 default:
|
|
|
853 ctx->param->value.data[ctx->param->value.len++] = ch;
|
|
|
854
|
|
|
855 if (ctx->param->value.len == ctx->value_len) {
|
|
|
856 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
857 "too long \"%V\" value of \"%V\" parameter "
|
|
|
858 "in \"%V\" SSI command",
|
|
|
859 &ctx->param->value, &ctx->param->key,
|
|
|
860 &ctx->command);
|
|
|
861 state = ssi_error_state;
|
|
|
862 break;
|
|
|
863 }
|
|
|
864 }
|
|
|
865
|
|
|
866 break;
|
|
|
867
|
|
|
868 case ssi_quoted_value_state:
|
|
|
869 switch (ch) {
|
|
|
870 case '\\':
|
|
|
871 ctx->saved_state = ssi_quoted_value_state;
|
|
|
872 state = ssi_quoted_symbol_state;
|
|
|
873 break;
|
|
|
874
|
|
|
875 case '\'':
|
|
|
876 state = ssi_postparam_state;
|
|
|
877 break;
|
|
|
878
|
|
|
879 default:
|
|
|
880 ctx->param->value.data[ctx->param->value.len++] = ch;
|
|
|
881
|
|
|
882 if (ctx->param->value.len == ctx->value_len) {
|
|
|
883 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
884 "too long \"%V\" value of \"%V\" parameter "
|
|
|
885 "in \"%V\" SSI command",
|
|
|
886 &ctx->param->value, &ctx->param->key,
|
|
|
887 &ctx->command);
|
|
|
888 state = ssi_error_state;
|
|
|
889 break;
|
|
|
890 }
|
|
|
891 }
|
|
|
892
|
|
|
893 break;
|
|
|
894
|
|
|
895 case ssi_quoted_symbol_state:
|
|
|
896 ctx->param->value.data[ctx->param->value.len++] = ch;
|
|
|
897
|
|
|
898 if (ctx->param->value.len == ctx->value_len) {
|
|
|
899 if (ctx->param->value.len == ctx->value_len) {
|
|
|
900 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
901 "too long \"%V\" value of \"%V\" parameter "
|
|
|
902 "in \"%V\" SSI command",
|
|
|
903 &ctx->param->value, &ctx->param->key,
|
|
|
904 &ctx->command);
|
|
|
905 state = ssi_error_state;
|
|
|
906 break;
|
|
|
907 }
|
|
|
908 }
|
|
|
909
|
|
|
910 state = ctx->saved_state;
|
|
|
911 break;
|
|
|
912
|
|
|
913 case ssi_postparam_state:
|
|
|
914 switch (ch) {
|
|
|
915 case ' ':
|
|
|
916 case CR:
|
|
|
917 case LF:
|
|
|
918 case '\t':
|
|
|
919 state = ssi_preparam_state;
|
|
|
920 break;
|
|
|
921
|
|
|
922 case '-':
|
|
|
923 state = ssi_comment_end0_state;
|
|
|
924 break;
|
|
|
925
|
|
|
926 default:
|
|
|
927 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
928 "unexpected \"%c\" symbol after \"%V\" value "
|
|
|
929 "of \"%V\" parameter in \"%V\" SSI command",
|
|
|
930 ch, &ctx->param->value, &ctx->param->key,
|
|
|
931 &ctx->command);
|
|
|
932 state = ssi_error_state;
|
|
|
933 break;
|
|
|
934 }
|
|
|
935
|
|
|
936 break;
|
|
|
937
|
|
|
938 case ssi_comment_end0_state:
|
|
|
939 switch (ch) {
|
|
|
940 case '-':
|
|
|
941 state = ssi_comment_end1_state;
|
|
|
942 break;
|
|
|
943
|
|
|
944 default:
|
|
|
945 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
946 "unexpected \"%c\" symbol in \"%V\" SSI command",
|
|
|
947 ch, &ctx->command);
|
|
|
948 state = ssi_error_state;
|
|
|
949 break;
|
|
|
950 }
|
|
|
951
|
|
|
952 break;
|
|
|
953
|
|
|
954 case ssi_comment_end1_state:
|
|
|
955 switch (ch) {
|
|
|
956 case '>':
|
|
|
957 ctx->state = ssi_start_state;
|
|
|
958 ctx->pos = p + 1;
|
|
|
959 ctx->looked = looked;
|
|
|
960 ctx->copy_end = copy_end;
|
|
|
961
|
|
|
962 if (ctx->copy_start == NULL && copy_end) {
|
|
|
963 ctx->copy_start = ctx->buf->pos;
|
|
|
964 }
|
|
|
965
|
|
|
966 return NGX_OK;
|
|
|
967
|
|
|
968 default:
|
|
|
969 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
970 "unexpected \"%c\" symbol in \"%V\" SSI command",
|
|
|
971 ch, &ctx->command);
|
|
|
972 state = ssi_error_state;
|
|
|
973 break;
|
|
|
974 }
|
|
|
975
|
|
|
976 break;
|
|
|
977
|
|
|
978 case ssi_error_state:
|
|
|
979 switch (ch) {
|
|
|
980 case '-':
|
|
|
981 state = ssi_error_end0_state;
|
|
|
982 break;
|
|
|
983
|
|
|
984 default:
|
|
|
985 break;
|
|
|
986 }
|
|
|
987
|
|
|
988 break;
|
|
|
989
|
|
|
990 case ssi_error_end0_state:
|
|
|
991 switch (ch) {
|
|
|
992 case '-':
|
|
|
993 state = ssi_error_end1_state;
|
|
|
994 break;
|
|
|
995
|
|
|
996 default:
|
|
|
997 state = ssi_error_state;
|
|
|
998 break;
|
|
|
999 }
|
|
|
1000
|
|
|
1001 break;
|
|
|
1002
|
|
|
1003 case ssi_error_end1_state:
|
|
|
1004 switch (ch) {
|
|
|
1005 case '>':
|
|
|
1006 ctx->state = ssi_start_state;
|
|
|
1007 ctx->pos = p + 1;
|
|
|
1008 ctx->looked = looked;
|
|
|
1009 ctx->copy_end = copy_end;
|
|
|
1010
|
|
|
1011 if (ctx->copy_start == NULL && copy_end) {
|
|
|
1012 ctx->copy_start = ctx->buf->pos;
|
|
|
1013 }
|
|
|
1014
|
|
|
1015 return NGX_HTTP_SSI_ERROR;
|
|
|
1016
|
|
|
1017 default:
|
|
|
1018 state = ssi_error_state;
|
|
|
1019 break;
|
|
|
1020 }
|
|
|
1021
|
|
|
1022 break;
|
|
|
1023 }
|
|
|
1024 }
|
|
|
1025
|
|
|
1026 ctx->state = state;
|
|
|
1027 ctx->pos = p;
|
|
|
1028 ctx->looked = looked;
|
|
|
1029
|
|
|
1030 ctx->copy_end = (state == ssi_start_state) ? p : copy_end;
|
|
|
1031
|
|
|
1032 if (ctx->copy_start == NULL && ctx->copy_end) {
|
|
|
1033 ctx->copy_start = ctx->buf->pos;
|
|
|
1034 }
|
|
|
1035
|
|
|
1036 return NGX_AGAIN;
|
|
|
1037 }
|
|
|
1038
|
|
|
1039
|
|
|
1040 static ngx_int_t
|
|
|
1041 ngx_http_ssi_echo(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx,
|
|
|
1042 ngx_str_t **params)
|
|
|
1043 {
|
|
|
1044 u_char ch;
|
|
|
1045 ngx_uint_t i, n;
|
|
|
1046 ngx_buf_t *b;
|
|
|
1047 ngx_str_t *var, *value;
|
|
|
1048 ngx_chain_t *cl;
|
|
|
1049 ngx_list_part_t *part;
|
|
|
1050 ngx_table_elt_t *header;
|
|
|
1051
|
|
|
1052 var = params[NGX_HTTP_SSI_ECHO_VAR];
|
|
|
1053 value = NULL;
|
|
|
1054
|
|
|
1055 if (var->len > 5 && ngx_strncmp(var->data, "HTTP_", 5) == 0) {
|
|
|
1056
|
|
|
1057 part = &r->headers_in.headers.part;
|
|
|
1058 header = part->elts;
|
|
|
1059
|
|
|
1060 for (i = 0; /* void */ ; i++) {
|
|
|
1061
|
|
|
1062 if (i >= part->nelts) {
|
|
|
1063 if (part->next == NULL) {
|
|
|
1064 break;
|
|
|
1065 }
|
|
|
1066
|
|
|
1067 part = part->next;
|
|
|
1068 header = part->elts;
|
|
|
1069 i = 0;
|
|
|
1070 }
|
|
|
1071
|
|
|
1072 for (n = 0; n + 5 < var->len && n < header[i].key.len; n++)
|
|
|
1073 {
|
|
|
1074 ch = header[i].key.data[n];
|
|
|
1075
|
|
|
1076 if (ch >= 'a' && ch <= 'z') {
|
|
|
1077 ch &= ~0x20;
|
|
|
1078
|
|
|
1079 } else if (ch == '-') {
|
|
|
1080 ch = '_';
|
|
|
1081 }
|
|
|
1082
|
|
|
1083 if (var->data[n + 5] != ch) {
|
|
|
1084 break;
|
|
|
1085 }
|
|
|
1086 }
|
|
|
1087
|
|
|
1088 if (n + 5 == var->len) {
|
|
|
1089 value = &header[i].value;
|
|
|
1090 break;
|
|
|
1091 }
|
|
|
1092 }
|
|
|
1093
|
|
|
1094 } else if (var->len == sizeof("REMOTE_ADDR") - 1
|
|
|
1095 && ngx_strncmp(var->data, "REMOTE_ADDR",
|
|
|
1096 sizeof("REMOTE_ADDR") - 1) == 0)
|
|
|
1097 {
|
|
|
1098 value = &r->connection->addr_text;
|
|
|
1099 }
|
|
|
1100
|
|
|
1101
|
|
|
1102 if (value == NULL) {
|
|
|
1103 value = params[NGX_HTTP_SSI_ECHO_DEFAULT];
|
|
|
1104 }
|
|
|
1105
|
|
|
1106 if (value == NULL) {
|
|
|
1107 value = &ngx_http_ssi_none;
|
|
|
1108
|
|
|
1109 } else if (value->len == 0) {
|
|
|
1110 return NGX_OK;
|
|
|
1111 }
|
|
|
1112
|
|
|
1113 if (!(b = ngx_calloc_buf(r->pool))) {
|
|
|
1114 return NGX_HTTP_SSI_ERROR;
|
|
|
1115 }
|
|
|
1116
|
|
|
1117 if (!(cl = ngx_alloc_chain_link(r->pool))) {
|
|
|
1118 return NGX_HTTP_SSI_ERROR;
|
|
|
1119 }
|
|
|
1120
|
|
|
1121 b->memory = 1;
|
|
|
1122 b->pos = value->data;
|
|
|
1123 b->last = value->data + value->len;
|
|
|
1124
|
|
|
1125 cl->buf = b;
|
|
|
1126 cl->next = NULL;
|
|
|
1127 *ctx->last_out = cl;
|
|
|
1128 ctx->last_out = &cl->next;
|
|
|
1129
|
|
|
1130 return NGX_OK;
|
|
|
1131 }
|
|
|
1132
|
|
|
1133
|
|
|
1134 static void *
|
|
|
1135 ngx_http_ssi_create_conf(ngx_conf_t *cf)
|
|
|
1136 {
|
|
|
1137 ngx_http_ssi_conf_t *conf;
|
|
|
1138
|
|
|
1139 if (!(conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssi_conf_t)))) {
|
|
|
1140 return NGX_CONF_ERROR;
|
|
|
1141 }
|
|
|
1142
|
|
|
1143 conf->enable = NGX_CONF_UNSET;
|
|
|
1144 conf->silent_errors = NGX_CONF_UNSET;
|
|
|
1145
|
|
|
1146 conf->min_file_chunk = NGX_CONF_UNSET_SIZE;
|
|
|
1147 conf->value_len = NGX_CONF_UNSET_SIZE;
|
|
|
1148
|
|
|
1149 return conf;
|
|
|
1150 }
|
|
|
1151
|
|
|
1152
|
|
|
1153 static char *
|
|
|
1154 ngx_http_ssi_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
1155 {
|
|
|
1156 ngx_http_ssi_conf_t *prev = parent;
|
|
|
1157 ngx_http_ssi_conf_t *conf = child;
|
|
|
1158
|
|
|
1159 ngx_conf_merge_value(conf->enable, prev->enable, 0);
|
|
|
1160 ngx_conf_merge_value(conf->silent_errors, prev->silent_errors, 0);
|
|
|
1161
|
|
|
1162 ngx_conf_merge_size_value(conf->min_file_chunk, prev->min_file_chunk, 1024);
|
|
|
1163 ngx_conf_merge_size_value(conf->value_len, prev->value_len, 256);
|
|
|
1164
|
|
|
1165 return NGX_CONF_OK;
|
|
|
1166 }
|
|
|
1167
|
|
|
1168
|
|
|
1169 static ngx_int_t
|
|
|
1170 ngx_http_ssi_filter_init(ngx_cycle_t *cycle)
|
|
|
1171 {
|
|
|
1172 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
1173 ngx_http_top_header_filter = ngx_http_ssi_header_filter;
|
|
|
1174
|
|
|
1175 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
1176 ngx_http_top_body_filter = ngx_http_ssi_body_filter;
|
|
|
1177
|
|
|
1178 return NGX_OK;
|
|
|
1179 }
|
