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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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48
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44 ngx_chain_t *busy;
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45 ngx_chain_t *free;
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46
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46
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47 ngx_uint_t state;
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48 ngx_uint_t saved_state;
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49 size_t saved;
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50 size_t looked;
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51
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52 size_t value_len;
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53 } ngx_http_ssi_ctx_t;
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54
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55
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56 typedef ngx_int_t (*ngx_http_ssi_command_pt) (ngx_http_request_t *r,
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57 ngx_http_ssi_ctx_t *ctx, ngx_str_t **);
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58
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59
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60 typedef struct {
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61 ngx_str_t name;
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62 ngx_uint_t index;
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63
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64 ngx_uint_t mandatory;
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65 } ngx_http_ssi_param_t;
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66
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67
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68 typedef struct {
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69 ngx_str_t name;
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70 ngx_http_ssi_command_pt handler;
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71 ngx_http_ssi_param_t *params;
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72
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73 ngx_uint_t flush; /* unsigned flush:1; */
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74 } ngx_http_ssi_command_t;
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75
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76
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77 typedef enum {
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78 ssi_start_state = 0,
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79 ssi_tag_state,
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80 ssi_comment0_state,
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81 ssi_comment1_state,
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82 ssi_sharp_state,
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83 ssi_precommand_state,
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84 ssi_command_state,
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85 ssi_preparam_state,
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86 ssi_param_state,
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87 ssi_preequal_state,
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88 ssi_prevalue_state,
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89 ssi_double_quoted_value_state,
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90 ssi_quoted_value_state,
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91 ssi_quoted_symbol_state,
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92 ssi_postparam_state,
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93 ssi_comment_end0_state,
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94 ssi_comment_end1_state,
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95 ssi_error_state,
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96 ssi_error_end0_state,
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97 ssi_error_end1_state
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98 } ngx_http_ssi_state_e;
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99
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100
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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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48
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161 NULL /* init process */
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46
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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 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_ssi_ctx_t));
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216 if (ctx == NULL) {
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217 return NGX_ERROR;
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218 }
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219
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220 ngx_http_set_ctx(r, ctx, ngx_http_ssi_filter_module);
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221
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222
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223 ctx->value_len = conf->value_len;
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224 ctx->last_out = &ctx->out;
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225
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226 ctx->params.elts = ctx->params_array;
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227 ctx->params.size = sizeof(ngx_table_elt_t);
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228 ctx->params.nalloc = NGX_HTTP_SSI_PARAMS_N;
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229 ctx->params.pool = r->pool;
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230
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231 r->headers_out.content_length_n = -1;
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232 if (r->headers_out.content_length) {
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233 r->headers_out.content_length->key.len = 0;
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234 r->headers_out.content_length = NULL;
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235 }
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236
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237 r->headers_out.last_modified_time = -1;
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238 if (r->headers_out.last_modified) {
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239 r->headers_out.last_modified->key.len = 0;
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240 r->headers_out.last_modified = NULL;
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241 }
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242
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243 r->filter_need_in_memory = 1;
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244 r->filter_ssi_need_in_memory = 1;
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245
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246 return ngx_http_next_header_filter(r);
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247 }
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248
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249
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250 static ngx_int_t
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251 ngx_http_ssi_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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252 {
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253 ngx_int_t rc;
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254 ngx_uint_t i;
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255 ngx_buf_t *b;
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256 ngx_chain_t *cl;
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257 ngx_table_elt_t *param;
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258 ngx_http_ssi_ctx_t *ctx;
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259 ngx_http_ssi_conf_t *conf;
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260 ngx_http_ssi_param_t *prm;
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261 ngx_http_ssi_command_t *cmd;
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262 ngx_str_t *params[NGX_HTTP_SSI_MAX_PARAMS];
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263
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264 ctx = ngx_http_get_module_ctx(r, ngx_http_ssi_filter_module);
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265
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266 if (ctx == NULL || (in == NULL && ctx->in == NULL && ctx->busy == NULL)) {
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267 return ngx_http_next_body_filter(r, in);
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268 }
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269
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270 /* add the incoming chain to the chain ctx->in */
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271
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272 if (in) {
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273 if (ngx_chain_add_copy(r->pool, &ctx->in, in) == NGX_ERROR) {
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274 return NGX_ERROR;
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275 }
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276 }
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277
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278 conf = ngx_http_get_module_loc_conf(r, ngx_http_ssi_filter_module);
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279
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280 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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281 "http ssi filter");
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282
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48
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283 while (ctx->in || ctx->buf) {
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46
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284
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48
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285 if (ctx->buf == NULL ){
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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
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291 if (ctx->state == ssi_start_state) {
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292 ctx->copy_start = ctx->pos;
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293 ctx->copy_end = ctx->pos;
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294 }
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295
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296 b = NULL;
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297
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46
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298 while (ctx->pos < ctx->buf->last) {
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299
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300 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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301 "saved: %d state: %d", ctx->saved, ctx->state);
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302
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303 rc = ngx_http_ssi_parse(r, ctx);
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304
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305 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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306 "parse: %d, looked: %d %p-%p",
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307 rc, ctx->looked, ctx->copy_start, ctx->copy_end);
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308
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309 if (rc == NGX_ERROR) {
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310 return rc;
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311 }
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312
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313 if (ctx->copy_start != ctx->copy_end) {
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314
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315 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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316 "saved: %d", ctx->saved);
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317
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318 if (ctx->saved) {
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319
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320 if (ctx->free) {
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321 cl = ctx->free;
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322 ctx->free = ctx->free->next;
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323 b = cl->buf;
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324 ngx_memzero(b, sizeof(ngx_buf_t));
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325
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326 } else {
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327 b = ngx_calloc_buf(r->pool);
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328 if (b == NULL) {
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329 return NGX_ERROR;
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330 }
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331
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332 cl = ngx_alloc_chain_link(r->pool);
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333 if (cl == NULL) {
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334 return NGX_ERROR;
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335 }
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336
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337 cl->buf = b;
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46
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338 }
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339
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340 b->memory = 1;
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341 b->pos = ngx_http_ssi_string;
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342 b->last = ngx_http_ssi_string + ctx->saved;
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343
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344 *ctx->last_out = cl;
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345 ctx->last_out = &cl->next;
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346
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347 ctx->saved = 0;
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348 }
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349
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48
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350 if (ctx->free) {
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351 cl = ctx->free;
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352 ctx->free = ctx->free->next;
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353 b = cl->buf;
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354
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355 } else {
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356 b = ngx_alloc_buf(r->pool);
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357 if (b == NULL) {
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358 return NGX_ERROR;
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359 }
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360
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361 cl = ngx_alloc_chain_link(r->pool);
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362 if (cl == NULL) {
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363 return NGX_ERROR;
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364 }
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365
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366 cl->buf = b;
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46
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367 }
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368
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369 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t));
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370
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371 b->last_buf = 0;
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372 b->recycled = 0;
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46
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373 b->pos = ctx->copy_start;
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374 b->last = ctx->copy_end;
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375
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376 if (b->in_file) {
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377
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378 if (conf->min_file_chunk < (size_t) (b->last - b->pos)) {
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379 b->file_last = b->file_pos + (b->last - b->start);
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380 b->file_pos += b->pos - b->start;
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381
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382 } else {
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383 b->in_file = 0;
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384 }
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385 }
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386
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387 cl->next = NULL;
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388 *ctx->last_out = cl;
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389 ctx->last_out = &cl->next;
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390 }
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391
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392 if (ctx->state == ssi_start_state) {
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393 ctx->copy_start = ctx->pos;
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394 ctx->copy_end = ctx->pos;
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395
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396 } else {
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397 ctx->copy_start = NULL;
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398 ctx->copy_end = NULL;
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399 }
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400
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401 if (rc == NGX_AGAIN) {
|
|
|
402 continue;
|
|
|
403 }
|
|
|
404
|
|
|
405
|
|
|
406 if (rc == NGX_OK) {
|
|
|
407
|
|
|
408 for (cmd = ngx_http_ssi_commands; cmd->handler; cmd++) {
|
|
|
409 if (cmd->name.len == 0) {
|
|
|
410 cmd = (ngx_http_ssi_command_t *) cmd->handler;
|
|
|
411 }
|
|
|
412
|
|
|
413 if (cmd->name.len != ctx->command.len
|
|
|
414 || ngx_strncmp(cmd->name.data, ctx->command.data,
|
|
|
415 ctx->command.len) != 0)
|
|
|
416 {
|
|
|
417 continue;
|
|
|
418 }
|
|
|
419
|
|
|
420 break;
|
|
|
421 }
|
|
|
422
|
|
|
423 if (cmd->name.len == 0) {
|
|
|
424 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
425 "invalid SSI command: \"%V\"", &ctx->command);
|
|
|
426 goto ssi_error;
|
|
|
427 }
|
|
|
428
|
|
|
429 ngx_memzero(params,
|
|
|
430 NGX_HTTP_SSI_MAX_PARAMS * sizeof(ngx_str_t *));
|
|
|
431
|
|
|
432 param = ctx->params.elts;
|
|
|
433
|
|
|
434
|
|
|
435 for (i = 0; i < ctx->params.nelts; i++) {
|
|
|
436
|
|
|
437 for (prm = cmd->params; prm->name.len; prm++) {
|
|
|
438
|
|
|
439 if (param[i].key.len != prm->name.len
|
|
|
440 || ngx_strncmp(param[i].key.data, prm->name.data,
|
|
|
441 prm->name.len) != 0)
|
|
|
442 {
|
|
|
443 continue;
|
|
|
444 }
|
|
|
445
|
|
|
446 if (params[prm->index]) {
|
|
|
447 ngx_log_error(NGX_LOG_ERR,
|
|
|
448 r->connection->log, 0,
|
|
|
449 "duplicate \"%V\" parameter "
|
|
|
450 "in \"%V\" SSI command",
|
|
|
451 ¶m[i].key, &ctx->command);
|
|
|
452
|
|
|
453 goto ssi_error;
|
|
|
454 }
|
|
|
455
|
|
|
456 params[prm->index] = ¶m[i].value;
|
|
|
457
|
|
|
458 break;
|
|
|
459 }
|
|
|
460
|
|
|
461 if (prm->name.len == 0) {
|
|
|
462 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
463 "invalid parameter name: \"%V\" "
|
|
|
464 "in \"%V\" SSI command",
|
|
|
465 ¶m[i].key, &ctx->command);
|
|
|
466
|
|
|
467 goto ssi_error;
|
|
|
468 }
|
|
|
469 }
|
|
|
470
|
|
|
471 for (prm = cmd->params; prm->name.len; prm++) {
|
|
|
472 if (prm->mandatory && params[prm->index] == 0) {
|
|
|
473 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
474 "mandatory \"%V\" parameter is absent "
|
|
|
475 "in \"%V\" SSI command",
|
|
|
476 &prm->name, &ctx->command);
|
|
|
477
|
|
|
478 goto ssi_error;
|
|
|
479 }
|
|
|
480 }
|
|
|
481
|
|
|
482 if (cmd->handler(r, ctx, params) == NGX_OK) {
|
|
|
483 continue;
|
|
|
484 }
|
|
|
485 }
|
|
|
486
|
|
|
487
|
|
|
488 /* rc == NGX_HTTP_SSI_ERROR */
|
|
|
489
|
|
48
|
490 ssi_error:
|
|
46
|
491
|
|
|
492 if (conf->silent_errors) {
|
|
|
493 continue;
|
|
|
494 }
|
|
|
495
|
|
48
|
496 if (ctx->free) {
|
|
|
497 cl = ctx->free;
|
|
|
498 ctx->free = ctx->free->next;
|
|
|
499 b = cl->buf;
|
|
|
500 ngx_memzero(b, sizeof(ngx_buf_t));
|
|
|
501
|
|
|
502 } else {
|
|
|
503 b = ngx_calloc_buf(r->pool);
|
|
|
504 if (b == NULL) {
|
|
|
505 return NGX_ERROR;
|
|
|
506 }
|
|
|
507
|
|
|
508 cl = ngx_alloc_chain_link(r->pool);
|
|
|
509 if (cl == NULL) {
|
|
|
510 return NGX_ERROR;
|
|
|
511 }
|
|
|
512
|
|
|
513 cl->buf = b;
|
|
46
|
514 }
|
|
|
515
|
|
|
516 b->memory = 1;
|
|
|
517 b->pos = ngx_http_ssi_error_string;
|
|
|
518 b->last = ngx_http_ssi_error_string
|
|
|
519 + sizeof(ngx_http_ssi_error_string) - 1;
|
|
|
520
|
|
|
521 cl->next = NULL;
|
|
|
522 *ctx->last_out = cl;
|
|
|
523 ctx->last_out = &cl->next;
|
|
|
524
|
|
|
525 continue;
|
|
|
526 }
|
|
|
527
|
|
48
|
528 if (ctx->buf->recycled || ctx->buf->last_buf) {
|
|
|
529 if (b == NULL) {
|
|
|
530
|
|
|
531 if (ctx->free) {
|
|
|
532 cl = ctx->free;
|
|
|
533 ctx->free = ctx->free->next;
|
|
|
534 b = cl->buf;
|
|
|
535 ngx_memzero(b, sizeof(ngx_buf_t));
|
|
|
536
|
|
|
537 } else {
|
|
|
538 b = ngx_calloc_buf(r->pool);
|
|
|
539 if (b == NULL) {
|
|
|
540 return NGX_ERROR;
|
|
|
541 }
|
|
46
|
542
|
|
48
|
543 cl = ngx_alloc_chain_link(r->pool);
|
|
|
544 if (cl == NULL) {
|
|
|
545 return NGX_ERROR;
|
|
|
546 }
|
|
|
547
|
|
|
548 cl->buf = b;
|
|
|
549 }
|
|
|
550
|
|
|
551 cl->next = NULL;
|
|
|
552 *ctx->last_out = cl;
|
|
|
553 ctx->last_out = &cl->next;
|
|
|
554 }
|
|
|
555
|
|
|
556 b->last_buf = ctx->buf->last_buf;
|
|
|
557 b->flush = ctx->buf->recycled;
|
|
|
558 b->shadow = ctx->buf;
|
|
46
|
559 }
|
|
|
560
|
|
48
|
561 ctx->buf = NULL;
|
|
|
562
|
|
46
|
563 ctx->saved = ctx->looked;
|
|
|
564 }
|
|
|
565
|
|
48
|
566 if (ctx->out == NULL && ctx->busy == NULL) {
|
|
46
|
567 return NGX_OK;
|
|
|
568 }
|
|
|
569
|
|
|
570 rc = ngx_http_next_body_filter(r, ctx->out);
|
|
|
571
|
|
48
|
572 if (ctx->busy == NULL) {
|
|
|
573 ctx->busy = ctx->out;
|
|
|
574
|
|
|
575 } else {
|
|
|
576 for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ }
|
|
|
577 cl->next = ctx->out;
|
|
|
578 }
|
|
|
579
|
|
46
|
580 ctx->out = NULL;
|
|
|
581 ctx->last_out = &ctx->out;
|
|
|
582
|
|
48
|
583 while (ctx->busy) {
|
|
|
584
|
|
|
585 b = ctx->busy->buf;
|
|
|
586
|
|
|
587 if (ngx_buf_size(b) != 0) {
|
|
|
588 break;
|
|
|
589 }
|
|
|
590
|
|
|
591 #if (NGX_HAVE_WRITE_ZEROCOPY)
|
|
|
592 if (b->zerocopy_busy) {
|
|
|
593 break;
|
|
|
594 }
|
|
|
595 #endif
|
|
|
596
|
|
|
597 if (b->shadow) {
|
|
|
598 b->shadow->pos = b->shadow->last;
|
|
|
599 }
|
|
|
600
|
|
|
601 cl = ctx->busy;
|
|
|
602 ctx->busy = cl->next;
|
|
|
603 cl->next = ctx->free;
|
|
|
604 ctx->free = cl;
|
|
|
605 }
|
|
|
606
|
|
46
|
607 return rc;
|
|
|
608 }
|
|
|
609
|
|
|
610
|
|
|
611 static ngx_int_t
|
|
|
612 ngx_http_ssi_parse(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx)
|
|
|
613 {
|
|
|
614 u_char *p, *last, *copy_end, ch;
|
|
|
615 size_t looked;
|
|
|
616 ngx_http_ssi_state_e state;
|
|
|
617
|
|
|
618 state = ctx->state;
|
|
|
619 looked = ctx->looked;
|
|
|
620 last = ctx->buf->last;
|
|
|
621 copy_end = ctx->copy_end;
|
|
|
622
|
|
|
623 for (p = ctx->pos; p < last; p++) {
|
|
|
624
|
|
|
625 ch = *p;
|
|
|
626
|
|
|
627 if (state == ssi_start_state) {
|
|
|
628
|
|
|
629 /* the tight loop */
|
|
|
630
|
|
48
|
631 for ( ;; ) {
|
|
|
632 if (ch == '<') {
|
|
|
633 copy_end = p;
|
|
|
634 looked = 1;
|
|
|
635 state = ssi_tag_state;
|
|
|
636
|
|
|
637 goto tag_started;
|
|
46
|
638 }
|
|
|
639
|
|
48
|
640 if (++p == last) {
|
|
|
641 break;
|
|
|
642 }
|
|
46
|
643
|
|
48
|
644 ch = *p;
|
|
46
|
645 }
|
|
|
646
|
|
|
647 ctx->pos = p;
|
|
|
648 ctx->looked = looked;
|
|
|
649 ctx->copy_end = p;
|
|
|
650
|
|
|
651 if (ctx->copy_start == NULL) {
|
|
|
652 ctx->copy_start = ctx->buf->pos;
|
|
|
653 }
|
|
|
654
|
|
|
655 return NGX_AGAIN;
|
|
|
656
|
|
48
|
657 tag_started:
|
|
|
658
|
|
46
|
659 continue;
|
|
|
660 }
|
|
|
661
|
|
|
662 switch (state) {
|
|
|
663
|
|
|
664 case ssi_start_state:
|
|
|
665 break;
|
|
|
666
|
|
|
667 case ssi_tag_state:
|
|
|
668 switch (ch) {
|
|
|
669 case '!':
|
|
|
670 looked = 2;
|
|
|
671 state = ssi_comment0_state;
|
|
|
672 break;
|
|
|
673
|
|
|
674 case '<':
|
|
|
675 copy_end = p;
|
|
|
676 break;
|
|
|
677
|
|
|
678 default:
|
|
|
679 copy_end = p;
|
|
|
680 looked = 0;
|
|
|
681 state = ssi_start_state;
|
|
|
682 break;
|
|
|
683 }
|
|
|
684
|
|
|
685 break;
|
|
|
686
|
|
|
687 case ssi_comment0_state:
|
|
|
688 switch (ch) {
|
|
|
689 case '-':
|
|
|
690 looked = 3;
|
|
|
691 state = ssi_comment1_state;
|
|
|
692 break;
|
|
|
693
|
|
|
694 case '<':
|
|
|
695 copy_end = p;
|
|
|
696 looked = 1;
|
|
|
697 state = ssi_tag_state;
|
|
|
698 break;
|
|
|
699
|
|
|
700 default:
|
|
|
701 copy_end = p;
|
|
|
702 looked = 0;
|
|
|
703 state = ssi_start_state;
|
|
|
704 break;
|
|
|
705 }
|
|
|
706
|
|
|
707 break;
|
|
|
708
|
|
|
709 case ssi_comment1_state:
|
|
|
710 switch (ch) {
|
|
|
711 case '-':
|
|
|
712 looked = 4;
|
|
|
713 state = ssi_sharp_state;
|
|
|
714 break;
|
|
|
715
|
|
|
716 case '<':
|
|
|
717 copy_end = p;
|
|
|
718 looked = 1;
|
|
|
719 state = ssi_tag_state;
|
|
|
720 break;
|
|
|
721
|
|
|
722 default:
|
|
|
723 copy_end = p;
|
|
|
724 looked = 0;
|
|
|
725 state = ssi_start_state;
|
|
|
726 break;
|
|
|
727 }
|
|
|
728
|
|
|
729 break;
|
|
|
730
|
|
|
731 case ssi_sharp_state:
|
|
|
732 switch (ch) {
|
|
|
733 case '#':
|
|
|
734 if (ctx->copy_start) {
|
|
|
735 ctx->saved = 0;
|
|
|
736 }
|
|
|
737 looked = 0;
|
|
|
738 state = ssi_precommand_state;
|
|
|
739 break;
|
|
|
740
|
|
|
741 case '<':
|
|
|
742 copy_end = p;
|
|
|
743 looked = 1;
|
|
|
744 state = ssi_tag_state;
|
|
|
745 break;
|
|
|
746
|
|
|
747 default:
|
|
|
748 copy_end = p;
|
|
|
749 looked = 0;
|
|
|
750 state = ssi_start_state;
|
|
|
751 break;
|
|
|
752 }
|
|
|
753
|
|
|
754 break;
|
|
|
755
|
|
|
756 case ssi_precommand_state:
|
|
|
757 switch (ch) {
|
|
|
758 case ' ':
|
|
|
759 case CR:
|
|
|
760 case LF:
|
|
|
761 case '\t':
|
|
|
762 break;
|
|
|
763
|
|
|
764 default:
|
|
|
765 ctx->command.len = 1;
|
|
|
766 ctx->command.data = ngx_palloc(r->pool,
|
|
|
767 NGX_HTTP_SSI_COMMAND_LEN + 1);
|
|
|
768 if (ctx->command.data == NULL) {
|
|
|
769 return NGX_ERROR;
|
|
|
770 }
|
|
|
771
|
|
|
772 ctx->command.data[0] = ch;
|
|
|
773 ctx->params.nelts = 0;
|
|
|
774 state = ssi_command_state;
|
|
|
775 break;
|
|
|
776 }
|
|
|
777
|
|
|
778 break;
|
|
|
779
|
|
|
780 case ssi_command_state:
|
|
|
781 switch (ch) {
|
|
|
782 case ' ':
|
|
|
783 case CR:
|
|
|
784 case LF:
|
|
|
785 case '\t':
|
|
|
786 state = ssi_preparam_state;
|
|
|
787 break;
|
|
|
788
|
|
|
789 case '-':
|
|
|
790 state = ssi_comment_end0_state;
|
|
|
791 break;
|
|
|
792
|
|
|
793 default:
|
|
|
794 ctx->command.data[ctx->command.len++] = ch;
|
|
|
795
|
|
|
796 if (ctx->command.len == NGX_HTTP_SSI_COMMAND_LEN) {
|
|
|
797 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
798 "the \"%V\" SSI command is too long",
|
|
|
799 &ctx->command);
|
|
|
800
|
|
|
801 state = ssi_error_state;
|
|
|
802 break;
|
|
|
803 }
|
|
|
804 }
|
|
|
805
|
|
|
806 break;
|
|
|
807
|
|
|
808 case ssi_preparam_state:
|
|
|
809 switch (ch) {
|
|
|
810 case ' ':
|
|
|
811 case CR:
|
|
|
812 case LF:
|
|
|
813 case '\t':
|
|
|
814 break;
|
|
|
815
|
|
|
816 case '-':
|
|
|
817 state = ssi_comment_end0_state;
|
|
|
818 break;
|
|
|
819
|
|
|
820 default:
|
|
48
|
821 ctx->param = ngx_array_push(&ctx->params);
|
|
|
822 if (ctx->param == NULL) {
|
|
46
|
823 return NGX_ERROR;
|
|
|
824 }
|
|
|
825
|
|
|
826 ctx->param->key.len = 1;
|
|
|
827 ctx->param->key.data = ngx_palloc(r->pool,
|
|
|
828 NGX_HTTP_SSI_PARAM_LEN + 1);
|
|
|
829 if (ctx->param->key.data == NULL) {
|
|
|
830 return NGX_ERROR;
|
|
|
831 }
|
|
|
832
|
|
|
833 ctx->param->key.data[0] = ch;
|
|
|
834
|
|
|
835 ctx->param->value.len = 0;
|
|
|
836 ctx->param->value.data = ngx_palloc(r->pool,
|
|
|
837 ctx->value_len + 1);
|
|
|
838 if (ctx->param->value.data == NULL) {
|
|
|
839 return NGX_ERROR;
|
|
|
840 }
|
|
|
841
|
|
|
842 state = ssi_param_state;
|
|
|
843 break;
|
|
|
844 }
|
|
|
845
|
|
|
846 break;
|
|
|
847
|
|
|
848 case ssi_param_state:
|
|
|
849 switch (ch) {
|
|
|
850 case ' ':
|
|
|
851 case CR:
|
|
|
852 case LF:
|
|
|
853 case '\t':
|
|
|
854 state = ssi_preequal_state;
|
|
|
855 break;
|
|
|
856
|
|
|
857 case '=':
|
|
|
858 state = ssi_prevalue_state;
|
|
|
859 break;
|
|
|
860
|
|
|
861 case '-':
|
|
|
862 state = ssi_error_end0_state;
|
|
|
863
|
|
|
864 ctx->param->key.data[ctx->param->key.len++] = ch;
|
|
|
865 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
866 "invalid \"%V\" parameter in \"%V\" SSI command",
|
|
|
867 &ctx->param->key, &ctx->command);
|
|
|
868 break;
|
|
|
869
|
|
|
870 default:
|
|
|
871 ctx->param->key.data[ctx->param->key.len++] = ch;
|
|
|
872
|
|
|
873 if (ctx->param->key.len == NGX_HTTP_SSI_PARAM_LEN) {
|
|
|
874 state = ssi_error_state;
|
|
|
875 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
876 "too long \"%V\" parameter in "
|
|
|
877 "\"%V\" SSI command",
|
|
|
878 &ctx->param->key, &ctx->command);
|
|
|
879 break;
|
|
|
880 }
|
|
|
881 }
|
|
|
882
|
|
|
883 break;
|
|
|
884
|
|
|
885 case ssi_preequal_state:
|
|
|
886 switch (ch) {
|
|
|
887 case ' ':
|
|
|
888 case CR:
|
|
|
889 case LF:
|
|
|
890 case '\t':
|
|
|
891 break;
|
|
|
892
|
|
|
893 case '=':
|
|
|
894 state = ssi_prevalue_state;
|
|
|
895 break;
|
|
|
896
|
|
|
897 default:
|
|
|
898 if (ch == '-') {
|
|
|
899 state = ssi_error_end0_state;
|
|
|
900 } else {
|
|
|
901 state = ssi_error_state;
|
|
|
902 }
|
|
|
903
|
|
|
904 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
905 "unexpected \"%c\" symbol after \"%V\" "
|
|
|
906 "parameter in \"%V\" SSI command",
|
|
|
907 ch, &ctx->param->key, &ctx->command);
|
|
|
908 break;
|
|
|
909 }
|
|
|
910
|
|
|
911 break;
|
|
|
912
|
|
|
913 case ssi_prevalue_state:
|
|
|
914 switch (ch) {
|
|
|
915 case ' ':
|
|
|
916 case CR:
|
|
|
917 case LF:
|
|
|
918 case '\t':
|
|
|
919 break;
|
|
|
920
|
|
|
921 case '"':
|
|
|
922 state = ssi_double_quoted_value_state;
|
|
|
923 break;
|
|
|
924
|
|
|
925 case '\'':
|
|
|
926 state = ssi_quoted_value_state;
|
|
|
927 break;
|
|
|
928
|
|
|
929 default:
|
|
|
930 if (ch == '-') {
|
|
|
931 state = ssi_error_end0_state;
|
|
|
932 } else {
|
|
|
933 state = ssi_error_state;
|
|
|
934 }
|
|
|
935
|
|
|
936 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
937 "unexpected \"%c\" symbol before value of "
|
|
|
938 "\"%V\" parameter in \"%V\" SSI command",
|
|
|
939 ch, &ctx->param->key, &ctx->command);
|
|
|
940 break;
|
|
|
941 }
|
|
|
942
|
|
|
943 break;
|
|
|
944
|
|
|
945 case ssi_double_quoted_value_state:
|
|
|
946 switch (ch) {
|
|
|
947 case '\\':
|
|
|
948 ctx->saved_state = ssi_double_quoted_value_state;
|
|
|
949 state = ssi_quoted_symbol_state;
|
|
|
950 break;
|
|
|
951
|
|
|
952 case '"':
|
|
|
953 state = ssi_postparam_state;
|
|
|
954 break;
|
|
|
955
|
|
|
956 default:
|
|
|
957 ctx->param->value.data[ctx->param->value.len++] = ch;
|
|
|
958
|
|
|
959 if (ctx->param->value.len == ctx->value_len) {
|
|
|
960 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
961 "too long \"%V\" value of \"%V\" parameter "
|
|
|
962 "in \"%V\" SSI command",
|
|
|
963 &ctx->param->value, &ctx->param->key,
|
|
|
964 &ctx->command);
|
|
|
965 state = ssi_error_state;
|
|
|
966 break;
|
|
|
967 }
|
|
|
968 }
|
|
|
969
|
|
|
970 break;
|
|
|
971
|
|
|
972 case ssi_quoted_value_state:
|
|
|
973 switch (ch) {
|
|
|
974 case '\\':
|
|
|
975 ctx->saved_state = ssi_quoted_value_state;
|
|
|
976 state = ssi_quoted_symbol_state;
|
|
|
977 break;
|
|
|
978
|
|
|
979 case '\'':
|
|
|
980 state = ssi_postparam_state;
|
|
|
981 break;
|
|
|
982
|
|
|
983 default:
|
|
|
984 ctx->param->value.data[ctx->param->value.len++] = ch;
|
|
|
985
|
|
|
986 if (ctx->param->value.len == ctx->value_len) {
|
|
|
987 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
988 "too long \"%V\" value of \"%V\" parameter "
|
|
|
989 "in \"%V\" SSI command",
|
|
|
990 &ctx->param->value, &ctx->param->key,
|
|
|
991 &ctx->command);
|
|
|
992 state = ssi_error_state;
|
|
|
993 break;
|
|
|
994 }
|
|
|
995 }
|
|
|
996
|
|
|
997 break;
|
|
|
998
|
|
|
999 case ssi_quoted_symbol_state:
|
|
|
1000 ctx->param->value.data[ctx->param->value.len++] = ch;
|
|
|
1001
|
|
|
1002 if (ctx->param->value.len == ctx->value_len) {
|
|
|
1003 if (ctx->param->value.len == ctx->value_len) {
|
|
|
1004 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
1005 "too long \"%V\" value of \"%V\" parameter "
|
|
|
1006 "in \"%V\" SSI command",
|
|
|
1007 &ctx->param->value, &ctx->param->key,
|
|
|
1008 &ctx->command);
|
|
|
1009 state = ssi_error_state;
|
|
|
1010 break;
|
|
|
1011 }
|
|
|
1012 }
|
|
|
1013
|
|
|
1014 state = ctx->saved_state;
|
|
|
1015 break;
|
|
|
1016
|
|
|
1017 case ssi_postparam_state:
|
|
|
1018 switch (ch) {
|
|
|
1019 case ' ':
|
|
|
1020 case CR:
|
|
|
1021 case LF:
|
|
|
1022 case '\t':
|
|
|
1023 state = ssi_preparam_state;
|
|
|
1024 break;
|
|
|
1025
|
|
|
1026 case '-':
|
|
|
1027 state = ssi_comment_end0_state;
|
|
|
1028 break;
|
|
|
1029
|
|
|
1030 default:
|
|
|
1031 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
1032 "unexpected \"%c\" symbol after \"%V\" value "
|
|
|
1033 "of \"%V\" parameter in \"%V\" SSI command",
|
|
|
1034 ch, &ctx->param->value, &ctx->param->key,
|
|
|
1035 &ctx->command);
|
|
|
1036 state = ssi_error_state;
|
|
|
1037 break;
|
|
|
1038 }
|
|
|
1039
|
|
|
1040 break;
|
|
|
1041
|
|
|
1042 case ssi_comment_end0_state:
|
|
|
1043 switch (ch) {
|
|
|
1044 case '-':
|
|
|
1045 state = ssi_comment_end1_state;
|
|
|
1046 break;
|
|
|
1047
|
|
|
1048 default:
|
|
|
1049 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
1050 "unexpected \"%c\" symbol in \"%V\" SSI command",
|
|
|
1051 ch, &ctx->command);
|
|
|
1052 state = ssi_error_state;
|
|
|
1053 break;
|
|
|
1054 }
|
|
|
1055
|
|
|
1056 break;
|
|
|
1057
|
|
|
1058 case ssi_comment_end1_state:
|
|
|
1059 switch (ch) {
|
|
|
1060 case '>':
|
|
|
1061 ctx->state = ssi_start_state;
|
|
|
1062 ctx->pos = p + 1;
|
|
|
1063 ctx->looked = looked;
|
|
|
1064 ctx->copy_end = copy_end;
|
|
|
1065
|
|
|
1066 if (ctx->copy_start == NULL && copy_end) {
|
|
|
1067 ctx->copy_start = ctx->buf->pos;
|
|
|
1068 }
|
|
|
1069
|
|
|
1070 return NGX_OK;
|
|
|
1071
|
|
|
1072 default:
|
|
|
1073 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
1074 "unexpected \"%c\" symbol in \"%V\" SSI command",
|
|
|
1075 ch, &ctx->command);
|
|
|
1076 state = ssi_error_state;
|
|
|
1077 break;
|
|
|
1078 }
|
|
|
1079
|
|
|
1080 break;
|
|
|
1081
|
|
|
1082 case ssi_error_state:
|
|
|
1083 switch (ch) {
|
|
|
1084 case '-':
|
|
|
1085 state = ssi_error_end0_state;
|
|
|
1086 break;
|
|
|
1087
|
|
|
1088 default:
|
|
|
1089 break;
|
|
|
1090 }
|
|
|
1091
|
|
|
1092 break;
|
|
|
1093
|
|
|
1094 case ssi_error_end0_state:
|
|
|
1095 switch (ch) {
|
|
|
1096 case '-':
|
|
|
1097 state = ssi_error_end1_state;
|
|
|
1098 break;
|
|
|
1099
|
|
|
1100 default:
|
|
|
1101 state = ssi_error_state;
|
|
|
1102 break;
|
|
|
1103 }
|
|
|
1104
|
|
|
1105 break;
|
|
|
1106
|
|
|
1107 case ssi_error_end1_state:
|
|
|
1108 switch (ch) {
|
|
|
1109 case '>':
|
|
|
1110 ctx->state = ssi_start_state;
|
|
|
1111 ctx->pos = p + 1;
|
|
|
1112 ctx->looked = looked;
|
|
|
1113 ctx->copy_end = copy_end;
|
|
|
1114
|
|
|
1115 if (ctx->copy_start == NULL && copy_end) {
|
|
|
1116 ctx->copy_start = ctx->buf->pos;
|
|
|
1117 }
|
|
|
1118
|
|
|
1119 return NGX_HTTP_SSI_ERROR;
|
|
|
1120
|
|
|
1121 default:
|
|
|
1122 state = ssi_error_state;
|
|
|
1123 break;
|
|
|
1124 }
|
|
|
1125
|
|
|
1126 break;
|
|
|
1127 }
|
|
|
1128 }
|
|
|
1129
|
|
|
1130 ctx->state = state;
|
|
|
1131 ctx->pos = p;
|
|
|
1132 ctx->looked = looked;
|
|
|
1133
|
|
|
1134 ctx->copy_end = (state == ssi_start_state) ? p : copy_end;
|
|
|
1135
|
|
|
1136 if (ctx->copy_start == NULL && ctx->copy_end) {
|
|
|
1137 ctx->copy_start = ctx->buf->pos;
|
|
|
1138 }
|
|
|
1139
|
|
|
1140 return NGX_AGAIN;
|
|
|
1141 }
|
|
|
1142
|
|
|
1143
|
|
|
1144 static ngx_int_t
|
|
|
1145 ngx_http_ssi_echo(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx,
|
|
|
1146 ngx_str_t **params)
|
|
|
1147 {
|
|
50
|
1148 ngx_uint_t i;
|
|
48
|
1149 ngx_buf_t *b;
|
|
|
1150 ngx_str_t *var, *value;
|
|
|
1151 ngx_chain_t *cl;
|
|
50
|
1152 ngx_http_variable_value_t *vv;
|
|
46
|
1153
|
|
|
1154 var = params[NGX_HTTP_SSI_ECHO_VAR];
|
|
|
1155
|
|
50
|
1156 for (i = 0; i < var->len; i++) {
|
|
|
1157 var->data[i] = ngx_toupper(var->data[i]);
|
|
|
1158 }
|
|
46
|
1159
|
|
50
|
1160 vv = ngx_http_get_variable(r, var);
|
|
|
1161
|
|
|
1162 if (vv == NULL) {
|
|
46
|
1163 return NGX_HTTP_SSI_ERROR;
|
|
|
1164 }
|
|
|
1165
|
|
50
|
1166 if (vv == NGX_HTTP_VARIABLE_NOT_FOUND) {
|
|
48
|
1167 value = params[NGX_HTTP_SSI_ECHO_DEFAULT];
|
|
|
1168
|
|
|
1169 if (value == NULL) {
|
|
|
1170 value = &ngx_http_ssi_none;
|
|
|
1171
|
|
|
1172 } else if (value->len == 0) {
|
|
|
1173 return NGX_OK;
|
|
|
1174 }
|
|
|
1175
|
|
|
1176 } else {
|
|
50
|
1177 value = &vv->text;
|
|
48
|
1178
|
|
|
1179 if (value->len == 0) {
|
|
|
1180 return NGX_OK;
|
|
|
1181 }
|
|
|
1182 }
|
|
|
1183
|
|
|
1184 b = ngx_calloc_buf(r->pool);
|
|
|
1185 if (b == NULL) {
|
|
|
1186 return NGX_HTTP_SSI_ERROR;
|
|
|
1187 }
|
|
|
1188
|
|
|
1189 cl = ngx_alloc_chain_link(r->pool);
|
|
|
1190 if (cl == NULL) {
|
|
46
|
1191 return NGX_HTTP_SSI_ERROR;
|
|
|
1192 }
|
|
|
1193
|
|
|
1194 b->memory = 1;
|
|
|
1195 b->pos = value->data;
|
|
|
1196 b->last = value->data + value->len;
|
|
|
1197
|
|
|
1198 cl->buf = b;
|
|
|
1199 cl->next = NULL;
|
|
|
1200 *ctx->last_out = cl;
|
|
|
1201 ctx->last_out = &cl->next;
|
|
|
1202
|
|
|
1203 return NGX_OK;
|
|
|
1204 }
|
|
|
1205
|
|
|
1206
|
|
|
1207 static void *
|
|
|
1208 ngx_http_ssi_create_conf(ngx_conf_t *cf)
|
|
|
1209 {
|
|
|
1210 ngx_http_ssi_conf_t *conf;
|
|
|
1211
|
|
48
|
1212 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssi_conf_t));
|
|
|
1213 if (conf == NULL) {
|
|
46
|
1214 return NGX_CONF_ERROR;
|
|
|
1215 }
|
|
|
1216
|
|
|
1217 conf->enable = NGX_CONF_UNSET;
|
|
|
1218 conf->silent_errors = NGX_CONF_UNSET;
|
|
|
1219
|
|
|
1220 conf->min_file_chunk = NGX_CONF_UNSET_SIZE;
|
|
|
1221 conf->value_len = NGX_CONF_UNSET_SIZE;
|
|
|
1222
|
|
|
1223 return conf;
|
|
|
1224 }
|
|
|
1225
|
|
|
1226
|
|
|
1227 static char *
|
|
|
1228 ngx_http_ssi_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
1229 {
|
|
|
1230 ngx_http_ssi_conf_t *prev = parent;
|
|
|
1231 ngx_http_ssi_conf_t *conf = child;
|
|
|
1232
|
|
|
1233 ngx_conf_merge_value(conf->enable, prev->enable, 0);
|
|
|
1234 ngx_conf_merge_value(conf->silent_errors, prev->silent_errors, 0);
|
|
|
1235
|
|
|
1236 ngx_conf_merge_size_value(conf->min_file_chunk, prev->min_file_chunk, 1024);
|
|
|
1237 ngx_conf_merge_size_value(conf->value_len, prev->value_len, 256);
|
|
|
1238
|
|
|
1239 return NGX_CONF_OK;
|
|
|
1240 }
|
|
|
1241
|
|
|
1242
|
|
|
1243 static ngx_int_t
|
|
|
1244 ngx_http_ssi_filter_init(ngx_cycle_t *cycle)
|
|
|
1245 {
|
|
|
1246 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
1247 ngx_http_top_header_filter = ngx_http_ssi_header_filter;
|
|
|
1248
|
|
|
1249 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
1250 ngx_http_top_body_filter = ngx_http_ssi_body_filter;
|
|
|
1251
|
|
|
1252 return NGX_OK;
|
|
|
1253 }
|
