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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 #include <zlib.h>
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12
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13
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14 typedef struct {
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15 ngx_flag_t enable;
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16 ngx_flag_t no_buffer;
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17
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76
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18 ngx_array_t *types; /* array of ngx_str_t */
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19
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20 ngx_bufs_t bufs;
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21
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22 ngx_uint_t http_version;
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23 ngx_uint_t proxied;
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24
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25 ngx_int_t level;
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26 size_t wbits;
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27 size_t memlevel;
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28 ssize_t min_length;
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29 } ngx_http_gzip_conf_t;
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30
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31
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32 #define NGX_HTTP_GZIP_PROXIED_OFF 0x0002
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33 #define NGX_HTTP_GZIP_PROXIED_EXPIRED 0x0004
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34 #define NGX_HTTP_GZIP_PROXIED_NO_CACHE 0x0008
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35 #define NGX_HTTP_GZIP_PROXIED_NO_STORE 0x0010
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36 #define NGX_HTTP_GZIP_PROXIED_PRIVATE 0x0020
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37 #define NGX_HTTP_GZIP_PROXIED_NO_LM 0x0040
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38 #define NGX_HTTP_GZIP_PROXIED_NO_ETAG 0x0080
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39 #define NGX_HTTP_GZIP_PROXIED_AUTH 0x0100
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40 #define NGX_HTTP_GZIP_PROXIED_ANY 0x0200
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41
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42
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43 typedef struct {
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44 ngx_chain_t *in;
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45 ngx_chain_t *free;
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46 ngx_chain_t *busy;
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47 ngx_chain_t *out;
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48 ngx_chain_t **last_out;
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49 ngx_buf_t *in_buf;
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50 ngx_buf_t *out_buf;
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51 ngx_int_t bufs;
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52
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53 off_t length;
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54
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55 void *preallocated;
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56 char *free_mem;
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57 ngx_uint_t allocated;
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58
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59 unsigned flush:4;
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60 unsigned redo:1;
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61 unsigned done:1;
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62
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63 size_t zin;
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64 size_t zout;
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65
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66 uint32_t crc32;
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67 z_stream zstream;
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68 ngx_http_request_t *request;
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69 } ngx_http_gzip_ctx_t;
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70
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71
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72 static ngx_int_t ngx_http_gzip_proxied(ngx_http_request_t *r,
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73 ngx_http_gzip_conf_t *conf);
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74 static void *ngx_http_gzip_filter_alloc(void *opaque, u_int items,
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75 u_int size);
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76 static void ngx_http_gzip_filter_free(void *opaque, void *address);
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77 static void ngx_http_gzip_error(ngx_http_gzip_ctx_t *ctx);
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78
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79 static u_char *ngx_http_gzip_log_ratio(ngx_http_request_t *r, u_char *buf,
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80 ngx_http_log_op_t *op);
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81
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122
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82 static ngx_int_t ngx_http_gzip_add_variables(ngx_conf_t *cf);
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83 static ngx_int_t ngx_http_gzip_ratio_variable(ngx_http_request_t *r,
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84 ngx_http_variable_value_t *v, uintptr_t data);
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85
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86 static ngx_int_t ngx_http_gzip_filter_init(ngx_cycle_t *cycle);
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87 static void *ngx_http_gzip_create_conf(ngx_conf_t *cf);
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88 static char *ngx_http_gzip_merge_conf(ngx_conf_t *cf,
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89 void *parent, void *child);
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90 static char *ngx_http_gzip_types(ngx_conf_t *cf, ngx_command_t *cmd,
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91 void *conf);
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92 static char *ngx_http_gzip_window(ngx_conf_t *cf, void *post, void *data);
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93 static char *ngx_http_gzip_hash(ngx_conf_t *cf, void *post, void *data);
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94
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95
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96 static ngx_conf_num_bounds_t ngx_http_gzip_comp_level_bounds = {
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97 ngx_conf_check_num_bounds, 1, 9
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98 };
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99
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100 static ngx_conf_post_handler_pt ngx_http_gzip_window_p = ngx_http_gzip_window;
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101 static ngx_conf_post_handler_pt ngx_http_gzip_hash_p = ngx_http_gzip_hash;
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102
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103
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104 static ngx_conf_enum_t ngx_http_gzip_http_version[] = {
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105 { ngx_string("1.0"), NGX_HTTP_VERSION_10 },
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106 { ngx_string("1.1"), NGX_HTTP_VERSION_11 },
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107 { ngx_null_string, 0 }
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108 };
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109
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110
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111 static ngx_conf_bitmask_t ngx_http_gzip_proxied_mask[] = {
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112 { ngx_string("off"), NGX_HTTP_GZIP_PROXIED_OFF },
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113 { ngx_string("expired"), NGX_HTTP_GZIP_PROXIED_EXPIRED },
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114 { ngx_string("no-cache"), NGX_HTTP_GZIP_PROXIED_NO_CACHE },
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115 { ngx_string("no-store"), NGX_HTTP_GZIP_PROXIED_NO_STORE },
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116 { ngx_string("private"), NGX_HTTP_GZIP_PROXIED_PRIVATE },
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117 { ngx_string("no_last_modified"), NGX_HTTP_GZIP_PROXIED_NO_LM },
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118 { ngx_string("no_etag"), NGX_HTTP_GZIP_PROXIED_NO_ETAG },
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119 { ngx_string("auth"), NGX_HTTP_GZIP_PROXIED_AUTH },
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120 { ngx_string("any"), NGX_HTTP_GZIP_PROXIED_ANY },
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121 { ngx_null_string, 0 }
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122 };
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123
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124
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125 static ngx_command_t ngx_http_gzip_filter_commands[] = {
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126
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127 { ngx_string("gzip"),
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128 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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129 |NGX_CONF_FLAG,
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130 ngx_conf_set_flag_slot,
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131 NGX_HTTP_LOC_CONF_OFFSET,
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132 offsetof(ngx_http_gzip_conf_t, enable),
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133 NULL },
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134
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135 { ngx_string("gzip_buffers"),
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136 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
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137 ngx_conf_set_bufs_slot,
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138 NGX_HTTP_LOC_CONF_OFFSET,
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139 offsetof(ngx_http_gzip_conf_t, bufs),
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140 NULL },
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141
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142 { ngx_string("gzip_types"),
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143 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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144 ngx_http_gzip_types,
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145 NGX_HTTP_LOC_CONF_OFFSET,
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146 0,
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147 NULL },
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148
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149 { ngx_string("gzip_comp_level"),
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150 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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151 ngx_conf_set_num_slot,
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152 NGX_HTTP_LOC_CONF_OFFSET,
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153 offsetof(ngx_http_gzip_conf_t, level),
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154 &ngx_http_gzip_comp_level_bounds },
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155
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156 { ngx_string("gzip_window"),
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157 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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158 ngx_conf_set_size_slot,
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159 NGX_HTTP_LOC_CONF_OFFSET,
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160 offsetof(ngx_http_gzip_conf_t, wbits),
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161 &ngx_http_gzip_window_p },
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162
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163 { ngx_string("gzip_hash"),
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164 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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165 ngx_conf_set_size_slot,
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166 NGX_HTTP_LOC_CONF_OFFSET,
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167 offsetof(ngx_http_gzip_conf_t, memlevel),
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168 &ngx_http_gzip_hash_p },
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169
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170 { ngx_string("gzip_no_buffer"),
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171 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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172 ngx_conf_set_flag_slot,
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173 NGX_HTTP_LOC_CONF_OFFSET,
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174 offsetof(ngx_http_gzip_conf_t, no_buffer),
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175 NULL },
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176
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177 { ngx_string("gzip_http_version"),
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178 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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179 ngx_conf_set_enum_slot,
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180 NGX_HTTP_LOC_CONF_OFFSET,
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181 offsetof(ngx_http_gzip_conf_t, http_version),
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182 &ngx_http_gzip_http_version },
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183
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184 { ngx_string("gzip_proxied"),
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185 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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186 ngx_conf_set_bitmask_slot,
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187 NGX_HTTP_LOC_CONF_OFFSET,
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188 offsetof(ngx_http_gzip_conf_t, proxied),
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189 &ngx_http_gzip_proxied_mask },
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190
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191 { ngx_string("gzip_min_length"),
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192 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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193 ngx_conf_set_size_slot,
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194 NGX_HTTP_LOC_CONF_OFFSET,
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195 offsetof(ngx_http_gzip_conf_t, min_length),
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196 NULL },
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197
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198 ngx_null_command
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199 };
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200
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201
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202 static ngx_http_module_t ngx_http_gzip_filter_module_ctx = {
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122
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203 ngx_http_gzip_add_variables, /* preconfiguration */
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204 NULL, /* postconfiguration */
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205
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206 NULL, /* create main configuration */
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207 NULL, /* init main configuration */
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208
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209 NULL, /* create server configuration */
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210 NULL, /* merge server configuration */
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211
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212 ngx_http_gzip_create_conf, /* create location configuration */
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213 ngx_http_gzip_merge_conf /* merge location configuration */
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214 };
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215
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216
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217 ngx_module_t ngx_http_gzip_filter_module = {
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218 NGX_MODULE_V1,
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219 &ngx_http_gzip_filter_module_ctx, /* module context */
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220 ngx_http_gzip_filter_commands, /* module directives */
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221 NGX_HTTP_MODULE, /* module type */
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90
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222 NULL, /* init master */
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223 ngx_http_gzip_filter_init, /* init module */
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90
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224 NULL, /* init process */
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225 NULL, /* init thread */
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226 NULL, /* exit thread */
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227 NULL, /* exit process */
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228 NULL, /* exit master */
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229 NGX_MODULE_V1_PADDING
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230 };
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231
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232
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233 static ngx_http_log_op_name_t ngx_http_gzip_log_fmt_ops[] = {
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234 { ngx_string("gzip_ratio"), NGX_INT32_LEN + 3,
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235 NULL, NULL, ngx_http_gzip_log_ratio },
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236 { ngx_null_string, 0, NULL, NULL, NULL }
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237 };
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238
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239
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240
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241 static u_char gzheader[10] = { 0x1f, 0x8b, Z_DEFLATED, 0, 0, 0, 0, 0, 0, 3 };
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242
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243 #if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
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244
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245 struct gztrailer {
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246 uint32_t crc32;
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247 uint32_t zlen;
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248 };
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249
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250 #else /* NGX_HAVE_BIG_ENDIAN || !NGX_HAVE_NONALIGNED */
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251
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252 struct gztrailer {
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253 u_char crc32[4];
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254 u_char zlen[4];
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255 };
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256
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257 #endif
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258
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259
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122
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260 static ngx_str_t ngx_http_gzip_ratio = ngx_string("gzip_ratio");
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261 static ngx_str_t ngx_http_gzip_no_cache = ngx_string("no-cache");
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262 static ngx_str_t ngx_http_gzip_no_store = ngx_string("no-store");
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263 static ngx_str_t ngx_http_gzip_private = ngx_string("private");
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264
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265
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266 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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267 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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268
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269
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270 static ngx_int_t
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271 ngx_http_gzip_header_filter(ngx_http_request_t *r)
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272 {
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273 ngx_str_t *type;
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274 ngx_uint_t i;
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275 ngx_http_gzip_ctx_t *ctx;
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276 ngx_http_gzip_conf_t *conf;
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277
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278 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
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279
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280 if (!conf->enable
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281 || (r->headers_out.status != NGX_HTTP_OK
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282 && r->headers_out.status != NGX_HTTP_FORBIDDEN
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283 && r->headers_out.status != NGX_HTTP_NOT_FOUND)
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284 || r->header_only
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146
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285 || r != r->main
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286 || r->http_version < conf->http_version
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287 || r->headers_out.content_type.len == 0
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288 || (r->headers_out.content_encoding
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289 && r->headers_out.content_encoding->value.len)
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290 || r->headers_in.accept_encoding == NULL
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291 || (r->headers_out.content_length_n != -1
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292 && r->headers_out.content_length_n < conf->min_length)
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293 || ngx_strstr(r->headers_in.accept_encoding->value.data, "gzip") == NULL
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294 )
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295 {
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296 return ngx_http_next_header_filter(r);
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297 }
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298
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299
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300 type = conf->types->elts;
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301 for (i = 0; i < conf->types->nelts; i++) {
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302 if (r->headers_out.content_type.len >= type[i].len
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126
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303 && ngx_strncasecmp(r->headers_out.content_type.data,
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304 type[i].data, type[i].len) == 0)
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305 {
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306 goto found;
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307 }
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308 }
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309
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310 return ngx_http_next_header_filter(r);
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311
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312
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313 found:
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314
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315 if (r->headers_in.via) {
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316 if (conf->proxied & NGX_HTTP_GZIP_PROXIED_OFF) {
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317 return ngx_http_next_header_filter(r);
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318 }
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319
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320 if (!(conf->proxied & NGX_HTTP_GZIP_PROXIED_ANY)
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321 && ngx_http_gzip_proxied(r, conf) == NGX_DECLINED)
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322 {
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323 return ngx_http_next_header_filter(r);
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324 }
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325 }
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326
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327
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328 /*
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329 * if the URL (without the "http://" prefix) is longer than 253 bytes
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330 * then MSIE 4.x can not handle the compressed stream - it waits too long,
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331 * hangs up or crashes
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332 */
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333
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334 if (r->headers_in.msie4 && r->unparsed_uri.len > 200) {
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335 return ngx_http_next_header_filter(r);
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336 }
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337
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338 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_gzip_ctx_t));
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339 if (ctx == NULL) {
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340 return NGX_ERROR;
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341 }
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342
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343 ngx_http_set_ctx(r, ctx, ngx_http_gzip_filter_module);
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344
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345
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346 ctx->request = r;
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347
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348 r->headers_out.content_encoding = ngx_list_push(&r->headers_out.headers);
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349 if (r->headers_out.content_encoding == NULL) {
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350 return NGX_ERROR;
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351 }
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352
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353 r->headers_out.content_encoding->hash = 1;
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354 r->headers_out.content_encoding->key.len = sizeof("Content-Encoding") - 1;
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355 r->headers_out.content_encoding->key.data = (u_char *) "Content-Encoding";
|
|
|
356 r->headers_out.content_encoding->value.len = sizeof("gzip") - 1;
|
|
|
357 r->headers_out.content_encoding->value.data = (u_char *) "gzip";
|
|
|
358
|
|
|
359 ctx->length = r->headers_out.content_length_n;
|
|
58
|
360
|
|
62
|
361 r->main_filter_need_in_memory = 1;
|
|
50
|
362
|
|
126
|
363 ngx_http_clear_content_length(r);
|
|
|
364 ngx_http_clear_accept_ranges(r);
|
|
|
365
|
|
50
|
366 return ngx_http_next_header_filter(r);
|
|
|
367 }
|
|
|
368
|
|
|
369
|
|
|
370 static ngx_int_t
|
|
|
371 ngx_http_gzip_proxied(ngx_http_request_t *r, ngx_http_gzip_conf_t *conf)
|
|
|
372 {
|
|
|
373 time_t date, expires;
|
|
|
374
|
|
|
375 if (r->headers_in.authorization
|
|
|
376 && (conf->proxied & NGX_HTTP_GZIP_PROXIED_AUTH))
|
|
|
377 {
|
|
|
378 return NGX_OK;
|
|
|
379 }
|
|
|
380
|
|
|
381 if (r->headers_out.expires) {
|
|
|
382
|
|
|
383 if (!(conf->proxied & NGX_HTTP_GZIP_PROXIED_EXPIRED)) {
|
|
|
384 return NGX_DECLINED;
|
|
|
385 }
|
|
|
386
|
|
|
387 expires = ngx_http_parse_time(r->headers_out.expires->value.data,
|
|
|
388 r->headers_out.expires->value.len);
|
|
|
389 if (expires == NGX_ERROR) {
|
|
|
390 return NGX_DECLINED;
|
|
|
391 }
|
|
|
392
|
|
|
393 if (r->headers_out.date) {
|
|
|
394 date = ngx_http_parse_time(r->headers_out.date->value.data,
|
|
|
395 r->headers_out.date->value.len);
|
|
|
396 if (date == NGX_ERROR) {
|
|
|
397 return NGX_DECLINED;
|
|
|
398 }
|
|
|
399
|
|
|
400 } else {
|
|
|
401 date = ngx_time();
|
|
|
402 }
|
|
|
403
|
|
|
404 if (expires < date) {
|
|
|
405 return NGX_OK;
|
|
|
406 }
|
|
|
407
|
|
|
408 return NGX_DECLINED;
|
|
|
409 }
|
|
|
410
|
|
58
|
411 if (r->headers_out.cache_control.elts) {
|
|
50
|
412
|
|
|
413 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_CACHE)
|
|
58
|
414 && ngx_http_parse_multi_header_lines(&r->headers_out.cache_control,
|
|
|
415 &ngx_http_gzip_no_cache, NULL) >= 0)
|
|
50
|
416 {
|
|
|
417 return NGX_OK;
|
|
|
418 }
|
|
|
419
|
|
|
420 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_STORE)
|
|
58
|
421 && ngx_http_parse_multi_header_lines(&r->headers_out.cache_control,
|
|
|
422 &ngx_http_gzip_no_store, NULL) >= 0)
|
|
50
|
423 {
|
|
|
424 return NGX_OK;
|
|
|
425 }
|
|
|
426
|
|
|
427 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_PRIVATE)
|
|
58
|
428 && ngx_http_parse_multi_header_lines(&r->headers_out.cache_control,
|
|
|
429 &ngx_http_gzip_private, NULL) >= 0)
|
|
50
|
430 {
|
|
|
431 return NGX_OK;
|
|
|
432 }
|
|
|
433
|
|
|
434 return NGX_DECLINED;
|
|
|
435 }
|
|
|
436
|
|
|
437 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_LM)
|
|
|
438 && r->headers_out.last_modified)
|
|
|
439 {
|
|
|
440 return NGX_DECLINED;
|
|
|
441 }
|
|
|
442
|
|
|
443 if ((conf->proxied & NGX_HTTP_GZIP_PROXIED_NO_ETAG)
|
|
|
444 && r->headers_out.etag)
|
|
|
445 {
|
|
|
446 return NGX_DECLINED;
|
|
|
447 }
|
|
|
448
|
|
|
449 return NGX_OK;
|
|
|
450 }
|
|
|
451
|
|
|
452
|
|
|
453 static ngx_int_t
|
|
|
454 ngx_http_gzip_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
|
|
|
455 {
|
|
|
456 int rc, wbits, memlevel;
|
|
|
457 ngx_int_t last;
|
|
|
458 struct gztrailer *trailer;
|
|
|
459 ngx_buf_t *b;
|
|
|
460 ngx_chain_t *cl, out;
|
|
|
461 ngx_http_gzip_ctx_t *ctx;
|
|
|
462 ngx_http_gzip_conf_t *conf;
|
|
|
463
|
|
|
464 ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module);
|
|
|
465
|
|
|
466 if (ctx == NULL || ctx->done) {
|
|
|
467 return ngx_http_next_body_filter(r, in);
|
|
|
468 }
|
|
|
469
|
|
|
470 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
|
471
|
|
|
472 if (ctx->preallocated == NULL) {
|
|
|
473 wbits = conf->wbits;
|
|
|
474 memlevel = conf->memlevel;
|
|
|
475
|
|
|
476 if (ctx->length > 0) {
|
|
|
477
|
|
|
478 /* the actual zlib window size is smaller by 262 bytes */
|
|
|
479
|
|
|
480 while (ctx->length < ((1 << (wbits - 1)) - 262)) {
|
|
|
481 wbits--;
|
|
|
482 memlevel--;
|
|
|
483 }
|
|
|
484 }
|
|
|
485
|
|
|
486 /*
|
|
|
487 * We preallocate a memory for zlib in one buffer (200K-400K), this
|
|
|
488 * decreases a number of malloc() and free() calls and also probably
|
|
|
489 * decreases a number of syscalls (sbrk() and so on).
|
|
|
490 * Besides we free this memory as soon as the gzipping will complete
|
|
|
491 * and do not wait while a whole response will be sent to a client.
|
|
|
492 *
|
|
|
493 * 8K is for zlib deflate_state, it takes
|
|
58
|
494 * *) 5816 bytes on i386 and sparc64 (32-bit mode)
|
|
|
495 * *) 5920 bytes on amd64 and sparc64
|
|
50
|
496 */
|
|
|
497
|
|
|
498 ctx->allocated = 8192 + (1 << (wbits + 2)) + (1 << (memlevel + 9));
|
|
|
499
|
|
|
500 ctx->preallocated = ngx_palloc(r->pool, ctx->allocated);
|
|
|
501 if (ctx->preallocated == NULL) {
|
|
|
502 return NGX_ERROR;
|
|
|
503 }
|
|
|
504
|
|
|
505 ctx->free_mem = ctx->preallocated;
|
|
|
506
|
|
|
507 ctx->zstream.zalloc = ngx_http_gzip_filter_alloc;
|
|
|
508 ctx->zstream.zfree = ngx_http_gzip_filter_free;
|
|
|
509 ctx->zstream.opaque = ctx;
|
|
|
510
|
|
138
|
511 rc = deflateInit2(&ctx->zstream, (int) conf->level, Z_DEFLATED,
|
|
50
|
512 -wbits, memlevel, Z_DEFAULT_STRATEGY);
|
|
|
513
|
|
|
514 if (rc != Z_OK) {
|
|
|
515 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
516 "deflateInit2() failed: %d", rc);
|
|
|
517 ngx_http_gzip_error(ctx);
|
|
|
518 return NGX_ERROR;
|
|
|
519 }
|
|
|
520
|
|
|
521 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
522 if (b == NULL) {
|
|
|
523 ngx_http_gzip_error(ctx);
|
|
|
524 return NGX_ERROR;
|
|
|
525 }
|
|
|
526
|
|
|
527 b->memory = 1;
|
|
|
528 b->pos = gzheader;
|
|
|
529 b->last = b->pos + 10;
|
|
|
530
|
|
|
531 out.buf = b;
|
|
|
532 out.next = NULL;
|
|
|
533
|
|
|
534 /*
|
|
|
535 * We pass the gzheader to the next filter now to avoid its linking
|
|
|
536 * to the ctx->busy chain. zlib does not usually output the compressed
|
|
|
537 * data in the initial iterations, so the gzheader that was linked
|
|
|
538 * to the ctx->busy chain would be flushed by ngx_http_write_filter().
|
|
|
539 */
|
|
|
540
|
|
|
541 if (ngx_http_next_body_filter(r, &out) == NGX_ERROR) {
|
|
|
542 ngx_http_gzip_error(ctx);
|
|
|
543 return NGX_ERROR;
|
|
|
544 }
|
|
|
545
|
|
146
|
546 r->connection->buffered |= NGX_HTTP_GZIP_BUFFERED;
|
|
|
547
|
|
50
|
548 ctx->last_out = &ctx->out;
|
|
|
549
|
|
|
550 ctx->crc32 = crc32(0L, Z_NULL, 0);
|
|
|
551 ctx->flush = Z_NO_FLUSH;
|
|
|
552 }
|
|
|
553
|
|
|
554 if (in) {
|
|
|
555 if (ngx_chain_add_copy(r->pool, &ctx->in, in) == NGX_ERROR) {
|
|
|
556 ngx_http_gzip_error(ctx);
|
|
|
557 return NGX_ERROR;
|
|
|
558 }
|
|
|
559 }
|
|
|
560
|
|
|
561 last = NGX_NONE;
|
|
|
562
|
|
|
563 for ( ;; ) {
|
|
|
564
|
|
|
565 for ( ;; ) {
|
|
|
566
|
|
|
567 /* does zlib need a new data ? */
|
|
|
568
|
|
|
569 if (ctx->zstream.avail_in == 0
|
|
|
570 && ctx->flush == Z_NO_FLUSH
|
|
|
571 && !ctx->redo)
|
|
|
572 {
|
|
|
573 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
574 "gzip in: %p", ctx->in);
|
|
|
575
|
|
|
576 if (ctx->in == NULL) {
|
|
|
577 break;
|
|
|
578 }
|
|
|
579
|
|
|
580 ctx->in_buf = ctx->in->buf;
|
|
|
581 ctx->in = ctx->in->next;
|
|
|
582
|
|
|
583 ctx->zstream.next_in = ctx->in_buf->pos;
|
|
|
584 ctx->zstream.avail_in = ctx->in_buf->last - ctx->in_buf->pos;
|
|
|
585
|
|
|
586 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
587 "gzip in_buf:%p ni:%p ai:%ud",
|
|
|
588 ctx->in_buf,
|
|
|
589 ctx->zstream.next_in, ctx->zstream.avail_in);
|
|
|
590
|
|
|
591 /* STUB */
|
|
|
592 if (ctx->in_buf->last < ctx->in_buf->pos) {
|
|
|
593 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
594 "zstream.avail_in is huge");
|
|
|
595 ctx->done = 1;
|
|
|
596 return NGX_ERROR;
|
|
|
597 }
|
|
|
598 /**/
|
|
|
599
|
|
|
600 if (ctx->in_buf->last_buf) {
|
|
|
601 ctx->flush = Z_FINISH;
|
|
|
602
|
|
|
603 } else if (ctx->in_buf->flush) {
|
|
|
604 ctx->flush = Z_SYNC_FLUSH;
|
|
|
605 }
|
|
|
606
|
|
|
607 if (ctx->zstream.avail_in == 0) {
|
|
|
608 if (ctx->flush == Z_NO_FLUSH) {
|
|
|
609 continue;
|
|
|
610 }
|
|
|
611
|
|
|
612 } else {
|
|
|
613 ctx->crc32 = crc32(ctx->crc32, ctx->zstream.next_in,
|
|
|
614 ctx->zstream.avail_in);
|
|
|
615 }
|
|
|
616 }
|
|
|
617
|
|
|
618
|
|
|
619 /* is there a space for the gzipped data ? */
|
|
|
620
|
|
|
621 if (ctx->zstream.avail_out == 0) {
|
|
|
622
|
|
|
623 if (ctx->free) {
|
|
|
624 ctx->out_buf = ctx->free->buf;
|
|
|
625 ctx->free = ctx->free->next;
|
|
|
626
|
|
|
627 } else if (ctx->bufs < conf->bufs.num) {
|
|
|
628 ctx->out_buf = ngx_create_temp_buf(r->pool,
|
|
|
629 conf->bufs.size);
|
|
|
630 if (ctx->out_buf == NULL) {
|
|
|
631 ngx_http_gzip_error(ctx);
|
|
|
632 return NGX_ERROR;
|
|
|
633 }
|
|
|
634
|
|
|
635 ctx->out_buf->tag = (ngx_buf_tag_t)
|
|
|
636 &ngx_http_gzip_filter_module;
|
|
|
637 ctx->out_buf->recycled = 1;
|
|
|
638 ctx->bufs++;
|
|
|
639
|
|
|
640 } else {
|
|
|
641 break;
|
|
|
642 }
|
|
|
643
|
|
|
644 ctx->zstream.next_out = ctx->out_buf->pos;
|
|
|
645 ctx->zstream.avail_out = conf->bufs.size;
|
|
|
646 }
|
|
|
647
|
|
|
648 ngx_log_debug6(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
649 "deflate in: ni:%p no:%p ai:%ud ao:%ud fl:%d redo:%d",
|
|
|
650 ctx->zstream.next_in, ctx->zstream.next_out,
|
|
|
651 ctx->zstream.avail_in, ctx->zstream.avail_out,
|
|
|
652 ctx->flush, ctx->redo);
|
|
|
653
|
|
|
654 rc = deflate(&ctx->zstream, ctx->flush);
|
|
|
655
|
|
|
656 if (rc != Z_OK && rc != Z_STREAM_END) {
|
|
|
657 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
658 "deflate() failed: %d, %d", ctx->flush, rc);
|
|
|
659 ngx_http_gzip_error(ctx);
|
|
|
660 return NGX_ERROR;
|
|
|
661 }
|
|
|
662
|
|
|
663 ngx_log_debug5(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
664 "deflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d",
|
|
|
665 ctx->zstream.next_in, ctx->zstream.next_out,
|
|
|
666 ctx->zstream.avail_in, ctx->zstream.avail_out,
|
|
|
667 rc);
|
|
|
668
|
|
|
669 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
670 "gzip in_buf:%p pos:%p",
|
|
|
671 ctx->in_buf, ctx->in_buf->pos);
|
|
|
672
|
|
|
673
|
|
|
674 if (ctx->zstream.next_in) {
|
|
|
675 ctx->in_buf->pos = ctx->zstream.next_in;
|
|
|
676
|
|
|
677 if (ctx->zstream.avail_in == 0) {
|
|
|
678 ctx->zstream.next_in = NULL;
|
|
|
679 }
|
|
|
680 }
|
|
|
681
|
|
|
682 ctx->out_buf->last = ctx->zstream.next_out;
|
|
|
683
|
|
|
684 if (ctx->zstream.avail_out == 0) {
|
|
|
685
|
|
|
686 /* zlib wants to output some more gzipped data */
|
|
|
687
|
|
|
688 cl = ngx_alloc_chain_link(r->pool);
|
|
|
689 if (cl == NULL) {
|
|
|
690 ngx_http_gzip_error(ctx);
|
|
|
691 return NGX_ERROR;
|
|
|
692 }
|
|
|
693
|
|
|
694 cl->buf = ctx->out_buf;
|
|
|
695 cl->next = NULL;
|
|
|
696 *ctx->last_out = cl;
|
|
|
697 ctx->last_out = &cl->next;
|
|
|
698
|
|
|
699 ctx->redo = 1;
|
|
|
700
|
|
|
701 continue;
|
|
|
702 }
|
|
|
703
|
|
|
704 ctx->redo = 0;
|
|
|
705
|
|
|
706 if (ctx->flush == Z_SYNC_FLUSH) {
|
|
|
707
|
|
58
|
708 ctx->zstream.avail_out = 0;
|
|
|
709 ctx->out_buf->flush = 1;
|
|
50
|
710 ctx->flush = Z_NO_FLUSH;
|
|
|
711
|
|
|
712 cl = ngx_alloc_chain_link(r->pool);
|
|
|
713 if (cl == NULL) {
|
|
|
714 ngx_http_gzip_error(ctx);
|
|
|
715 return NGX_ERROR;
|
|
|
716 }
|
|
|
717
|
|
|
718 cl->buf = ctx->out_buf;
|
|
|
719 cl->next = NULL;
|
|
|
720 *ctx->last_out = cl;
|
|
|
721 ctx->last_out = &cl->next;
|
|
|
722
|
|
|
723 break;
|
|
|
724 }
|
|
|
725
|
|
|
726 if (rc == Z_STREAM_END) {
|
|
|
727
|
|
|
728 ctx->zin = ctx->zstream.total_in;
|
|
|
729 ctx->zout = 10 + ctx->zstream.total_out + 8;
|
|
|
730
|
|
|
731 rc = deflateEnd(&ctx->zstream);
|
|
|
732
|
|
|
733 if (rc != Z_OK) {
|
|
|
734 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
735 "deflateEnd() failed: %d", rc);
|
|
|
736 ngx_http_gzip_error(ctx);
|
|
|
737 return NGX_ERROR;
|
|
|
738 }
|
|
|
739
|
|
|
740 ngx_pfree(r->pool, ctx->preallocated);
|
|
|
741
|
|
|
742 cl = ngx_alloc_chain_link(r->pool);
|
|
|
743 if (cl == NULL) {
|
|
|
744 ngx_http_gzip_error(ctx);
|
|
|
745 return NGX_ERROR;
|
|
|
746 }
|
|
|
747
|
|
|
748 cl->buf = ctx->out_buf;
|
|
|
749 cl->next = NULL;
|
|
|
750 *ctx->last_out = cl;
|
|
|
751 ctx->last_out = &cl->next;
|
|
|
752
|
|
|
753 if (ctx->zstream.avail_out >= 8) {
|
|
|
754 trailer = (struct gztrailer *) ctx->out_buf->last;
|
|
|
755 ctx->out_buf->last += 8;
|
|
|
756 ctx->out_buf->last_buf = 1;
|
|
|
757
|
|
|
758 } else {
|
|
|
759 b = ngx_create_temp_buf(r->pool, 8);
|
|
|
760 if (b == NULL) {
|
|
|
761 ngx_http_gzip_error(ctx);
|
|
|
762 return NGX_ERROR;
|
|
|
763 }
|
|
|
764
|
|
|
765 b->last_buf = 1;
|
|
|
766
|
|
|
767 cl = ngx_alloc_chain_link(r->pool);
|
|
|
768 if (cl == NULL) {
|
|
|
769 ngx_http_gzip_error(ctx);
|
|
|
770 return NGX_ERROR;
|
|
|
771 }
|
|
|
772
|
|
|
773 cl->buf = b;
|
|
|
774 cl->next = NULL;
|
|
|
775 *ctx->last_out = cl;
|
|
|
776 ctx->last_out = &cl->next;
|
|
|
777 trailer = (struct gztrailer *) b->pos;
|
|
|
778 b->last += 8;
|
|
|
779 }
|
|
|
780
|
|
|
781 #if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
|
|
|
782
|
|
|
783 trailer->crc32 = ctx->crc32;
|
|
|
784 trailer->zlen = ctx->zin;
|
|
|
785
|
|
|
786 #else
|
|
|
787 trailer->crc32[0] = (u_char) (ctx->crc32 & 0xff);
|
|
|
788 trailer->crc32[1] = (u_char) ((ctx->crc32 >> 8) & 0xff);
|
|
|
789 trailer->crc32[2] = (u_char) ((ctx->crc32 >> 16) & 0xff);
|
|
|
790 trailer->crc32[3] = (u_char) ((ctx->crc32 >> 24) & 0xff);
|
|
|
791
|
|
|
792 trailer->zlen[0] = (u_char) (ctx->zin & 0xff);
|
|
|
793 trailer->zlen[1] = (u_char) ((ctx->zin >> 8) & 0xff);
|
|
|
794 trailer->zlen[2] = (u_char) ((ctx->zin >> 16) & 0xff);
|
|
|
795 trailer->zlen[3] = (u_char) ((ctx->zin >> 24) & 0xff);
|
|
|
796 #endif
|
|
|
797
|
|
|
798 ctx->zstream.avail_in = 0;
|
|
|
799 ctx->zstream.avail_out = 0;
|
|
|
800
|
|
|
801 ctx->done = 1;
|
|
|
802
|
|
146
|
803 r->connection->buffered &= ~NGX_HTTP_GZIP_BUFFERED;
|
|
|
804
|
|
50
|
805 break;
|
|
|
806 }
|
|
|
807
|
|
|
808 if (conf->no_buffer && ctx->in == NULL) {
|
|
|
809
|
|
|
810 cl = ngx_alloc_chain_link(r->pool);
|
|
|
811 if (cl == NULL) {
|
|
|
812 ngx_http_gzip_error(ctx);
|
|
|
813 return NGX_ERROR;
|
|
|
814 }
|
|
|
815
|
|
|
816 cl->buf = ctx->out_buf;
|
|
|
817 cl->next = NULL;
|
|
|
818 *ctx->last_out = cl;
|
|
|
819 ctx->last_out = &cl->next;
|
|
|
820
|
|
|
821 break;
|
|
|
822 }
|
|
|
823 }
|
|
|
824
|
|
|
825 if (last == NGX_AGAIN && !ctx->done) {
|
|
|
826 return NGX_AGAIN;
|
|
|
827 }
|
|
|
828
|
|
|
829 if (ctx->out == NULL && ctx->busy == NULL) {
|
|
|
830 return NGX_OK;
|
|
|
831 }
|
|
|
832
|
|
|
833 last = ngx_http_next_body_filter(r, ctx->out);
|
|
|
834
|
|
|
835 /*
|
|
|
836 * we do not check NGX_AGAIN here because the downstream filters
|
|
|
837 * may free some buffers and zlib may compress some data into them
|
|
|
838 */
|
|
|
839
|
|
|
840 if (last == NGX_ERROR) {
|
|
|
841 ngx_http_gzip_error(ctx);
|
|
|
842 return NGX_ERROR;
|
|
|
843 }
|
|
|
844
|
|
|
845 ngx_chain_update_chains(&ctx->free, &ctx->busy, &ctx->out,
|
|
|
846 (ngx_buf_tag_t) &ngx_http_gzip_filter_module);
|
|
|
847 ctx->last_out = &ctx->out;
|
|
|
848
|
|
|
849 if (ctx->done) {
|
|
|
850 return last;
|
|
|
851 }
|
|
|
852 }
|
|
|
853 }
|
|
|
854
|
|
|
855
|
|
|
856 static void *
|
|
|
857 ngx_http_gzip_filter_alloc(void *opaque, u_int items, u_int size)
|
|
|
858 {
|
|
|
859 ngx_http_gzip_ctx_t *ctx = opaque;
|
|
|
860
|
|
|
861 void *p;
|
|
|
862 ngx_uint_t alloc;
|
|
|
863
|
|
|
864 alloc = items * size;
|
|
|
865
|
|
|
866 if (alloc % 512 != 0) {
|
|
|
867
|
|
|
868 /*
|
|
|
869 * The zlib deflate_state allocation, it takes about 6K,
|
|
|
870 * we allocate 8K. Other allocations are divisible by 512.
|
|
|
871 */
|
|
|
872
|
|
|
873 alloc = (alloc + ngx_pagesize - 1) & ~(ngx_pagesize - 1);
|
|
|
874 }
|
|
|
875
|
|
|
876 if (alloc <= ctx->allocated) {
|
|
|
877 p = ctx->free_mem;
|
|
|
878 ctx->free_mem += alloc;
|
|
|
879 ctx->allocated -= alloc;
|
|
|
880
|
|
|
881 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0,
|
|
|
882 "gzip alloc: n:%ud s:%ud a:%ud p:%p",
|
|
|
883 items, size, alloc, p);
|
|
|
884
|
|
|
885 return p;
|
|
|
886 }
|
|
|
887
|
|
|
888 ngx_log_error(NGX_LOG_ALERT, ctx->request->connection->log, 0,
|
|
|
889 "gzip filter failed to use preallocated memory: %ud of %ud",
|
|
|
890 items * size, ctx->allocated);
|
|
|
891
|
|
|
892 p = ngx_palloc(ctx->request->pool, items * size);
|
|
|
893
|
|
|
894 return p;
|
|
|
895 }
|
|
|
896
|
|
|
897
|
|
|
898 static void
|
|
|
899 ngx_http_gzip_filter_free(void *opaque, void *address)
|
|
|
900 {
|
|
|
901 #if 0
|
|
|
902 ngx_http_gzip_ctx_t *ctx = opaque;
|
|
|
903
|
|
|
904 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0,
|
|
|
905 "gzip free: %p", address);
|
|
|
906 #endif
|
|
|
907 }
|
|
|
908
|
|
|
909
|
|
|
910 static u_char *
|
|
|
911 ngx_http_gzip_log_ratio(ngx_http_request_t *r, u_char *buf,
|
|
|
912 ngx_http_log_op_t *op)
|
|
|
913 {
|
|
|
914 ngx_uint_t zint, zfrac;
|
|
|
915 ngx_http_gzip_ctx_t *ctx;
|
|
|
916
|
|
|
917 ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module);
|
|
|
918
|
|
|
919 if (ctx == NULL || ctx->zout == 0) {
|
|
|
920 *buf = '-';
|
|
|
921 return buf + 1;
|
|
|
922 }
|
|
|
923
|
|
|
924 zint = (ngx_uint_t) (ctx->zin / ctx->zout);
|
|
|
925 zfrac = (ngx_uint_t) ((ctx->zin * 100 / ctx->zout) % 100);
|
|
|
926
|
|
|
927 if ((ctx->zin * 1000 / ctx->zout) % 10 > 4) {
|
|
|
928
|
|
|
929 /* the rounding, e.g., 2.125 to 2.13 */
|
|
|
930
|
|
|
931 zfrac++;
|
|
|
932
|
|
|
933 if (zfrac > 99) {
|
|
|
934 zint++;
|
|
|
935 zfrac = 0;
|
|
|
936 }
|
|
|
937 }
|
|
|
938
|
|
|
939 return ngx_sprintf(buf, "%ui.%02ui", zint, zfrac);
|
|
|
940 }
|
|
|
941
|
|
|
942
|
|
|
943 static void
|
|
|
944 ngx_http_gzip_error(ngx_http_gzip_ctx_t *ctx)
|
|
|
945 {
|
|
|
946 deflateEnd(&ctx->zstream);
|
|
|
947
|
|
|
948 if (ctx->preallocated) {
|
|
|
949 ngx_pfree(ctx->request->pool, ctx->preallocated);
|
|
|
950 }
|
|
|
951
|
|
|
952 ctx->zstream.avail_in = 0;
|
|
|
953 ctx->zstream.avail_out = 0;
|
|
|
954
|
|
|
955 ctx->done = 1;
|
|
|
956
|
|
|
957 return;
|
|
|
958 }
|
|
|
959
|
|
|
960
|
|
|
961 static ngx_int_t
|
|
122
|
962 ngx_http_gzip_add_variables(ngx_conf_t *cf)
|
|
50
|
963 {
|
|
122
|
964 ngx_http_variable_t *var;
|
|
50
|
965 ngx_http_log_op_name_t *op;
|
|
|
966
|
|
132
|
967 var = ngx_http_add_variable(cf, &ngx_http_gzip_ratio, NGX_HTTP_VAR_NOHASH);
|
|
122
|
968 if (var == NULL) {
|
|
|
969 return NGX_ERROR;
|
|
|
970 }
|
|
|
971
|
|
186
|
972 var->get_handler = ngx_http_gzip_ratio_variable;
|
|
122
|
973
|
|
50
|
974 for (op = ngx_http_gzip_log_fmt_ops; op->name.len; op++) { /* void */ }
|
|
|
975 op->run = NULL;
|
|
|
976
|
|
|
977 for (op = ngx_http_log_fmt_ops; op->run; op++) {
|
|
|
978 if (op->name.len == 0) {
|
|
|
979 op = (ngx_http_log_op_name_t *) op->run;
|
|
|
980 }
|
|
|
981 }
|
|
|
982
|
|
|
983 op->run = (ngx_http_log_op_run_pt) ngx_http_gzip_log_fmt_ops;
|
|
|
984
|
|
|
985 return NGX_OK;
|
|
|
986 }
|
|
|
987
|
|
|
988
|
|
|
989 static ngx_int_t
|
|
122
|
990 ngx_http_gzip_ratio_variable(ngx_http_request_t *r,
|
|
|
991 ngx_http_variable_value_t *v, uintptr_t data)
|
|
|
992 {
|
|
|
993 ngx_uint_t zint, zfrac;
|
|
|
994 ngx_http_gzip_ctx_t *ctx;
|
|
|
995
|
|
126
|
996 v->valid = 1;
|
|
122
|
997 v->no_cachable = 0;
|
|
|
998 v->not_found = 0;
|
|
|
999
|
|
|
1000 ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module);
|
|
|
1001
|
|
|
1002 if (ctx == NULL || ctx->zout == 0) {
|
|
|
1003 v->not_found = 1;
|
|
|
1004 return NGX_OK;
|
|
|
1005 }
|
|
|
1006
|
|
|
1007 v->data = ngx_palloc(r->pool, NGX_INT32_LEN + 3);
|
|
|
1008 if (v->data == NULL) {
|
|
|
1009 return NGX_ERROR;
|
|
|
1010 }
|
|
|
1011
|
|
|
1012 zint = (ngx_uint_t) (ctx->zin / ctx->zout);
|
|
|
1013 zfrac = (ngx_uint_t) ((ctx->zin * 100 / ctx->zout) % 100);
|
|
|
1014
|
|
|
1015 if ((ctx->zin * 1000 / ctx->zout) % 10 > 4) {
|
|
|
1016
|
|
|
1017 /* the rounding, e.g., 2.125 to 2.13 */
|
|
|
1018
|
|
|
1019 zfrac++;
|
|
|
1020
|
|
|
1021 if (zfrac > 99) {
|
|
|
1022 zint++;
|
|
|
1023 zfrac = 0;
|
|
|
1024 }
|
|
|
1025 }
|
|
|
1026
|
|
|
1027 v->len = ngx_sprintf(v->data, "%ui.%02ui", zint, zfrac) - v->data;
|
|
|
1028
|
|
|
1029 return NGX_OK;
|
|
|
1030 }
|
|
|
1031
|
|
|
1032
|
|
|
1033 static ngx_int_t
|
|
50
|
1034 ngx_http_gzip_filter_init(ngx_cycle_t *cycle)
|
|
|
1035 {
|
|
|
1036 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
1037 ngx_http_top_header_filter = ngx_http_gzip_header_filter;
|
|
|
1038
|
|
|
1039 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
1040 ngx_http_top_body_filter = ngx_http_gzip_body_filter;
|
|
|
1041
|
|
|
1042 return NGX_OK;
|
|
|
1043 }
|
|
|
1044
|
|
|
1045
|
|
|
1046 static void *
|
|
|
1047 ngx_http_gzip_create_conf(ngx_conf_t *cf)
|
|
|
1048 {
|
|
|
1049 ngx_http_gzip_conf_t *conf;
|
|
|
1050
|
|
|
1051 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_gzip_conf_t));
|
|
|
1052 if (conf == NULL) {
|
|
|
1053 return NGX_CONF_ERROR;
|
|
|
1054 }
|
|
|
1055
|
|
|
1056 /*
|
|
|
1057 * set by ngx_pcalloc():
|
|
|
1058 *
|
|
|
1059 * conf->bufs.num = 0;
|
|
|
1060 * conf->proxied = 0;
|
|
|
1061 * conf->types = NULL;
|
|
|
1062 */
|
|
|
1063
|
|
|
1064 conf->enable = NGX_CONF_UNSET;
|
|
|
1065 conf->no_buffer = NGX_CONF_UNSET;
|
|
|
1066
|
|
|
1067 conf->http_version = NGX_CONF_UNSET_UINT;
|
|
|
1068
|
|
|
1069 conf->level = NGX_CONF_UNSET;
|
|
|
1070 conf->wbits = (size_t) NGX_CONF_UNSET;
|
|
|
1071 conf->memlevel = (size_t) NGX_CONF_UNSET;
|
|
|
1072 conf->min_length = NGX_CONF_UNSET;
|
|
|
1073
|
|
|
1074 return conf;
|
|
|
1075 }
|
|
|
1076
|
|
|
1077
|
|
|
1078 static char *
|
|
|
1079 ngx_http_gzip_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
1080 {
|
|
|
1081 ngx_http_gzip_conf_t *prev = parent;
|
|
|
1082 ngx_http_gzip_conf_t *conf = child;
|
|
|
1083
|
|
76
|
1084 ngx_str_t *type;
|
|
50
|
1085
|
|
|
1086 ngx_conf_merge_value(conf->enable, prev->enable, 0);
|
|
|
1087
|
|
|
1088 ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, 4, ngx_pagesize);
|
|
|
1089
|
|
212
|
1090 ngx_conf_merge_uint_value(conf->http_version, prev->http_version,
|
|
50
|
1091 NGX_HTTP_VERSION_11);
|
|
|
1092 ngx_conf_merge_bitmask_value(conf->proxied, prev->proxied,
|
|
|
1093 (NGX_CONF_BITMASK_SET|NGX_HTTP_GZIP_PROXIED_OFF));
|
|
|
1094
|
|
|
1095 ngx_conf_merge_value(conf->level, prev->level, 1);
|
|
|
1096 ngx_conf_merge_size_value(conf->wbits, prev->wbits, MAX_WBITS);
|
|
|
1097 ngx_conf_merge_size_value(conf->memlevel, prev->memlevel,
|
|
|
1098 MAX_MEM_LEVEL - 1);
|
|
126
|
1099 ngx_conf_merge_value(conf->min_length, prev->min_length, 20);
|
|
50
|
1100 ngx_conf_merge_value(conf->no_buffer, prev->no_buffer, 0);
|
|
|
1101
|
|
|
1102 if (conf->types == NULL) {
|
|
|
1103 if (prev->types == NULL) {
|
|
76
|
1104 conf->types = ngx_array_create(cf->pool, 1, sizeof(ngx_str_t));
|
|
50
|
1105 if (conf->types == NULL) {
|
|
|
1106 return NGX_CONF_ERROR;
|
|
|
1107 }
|
|
|
1108
|
|
|
1109 type = ngx_array_push(conf->types);
|
|
|
1110 if (type == NULL) {
|
|
|
1111 return NGX_CONF_ERROR;
|
|
|
1112 }
|
|
|
1113
|
|
76
|
1114 type->len = sizeof("text/html") - 1;
|
|
|
1115 type->data = (u_char *) "text/html";
|
|
50
|
1116
|
|
|
1117 } else {
|
|
|
1118 conf->types = prev->types;
|
|
|
1119 }
|
|
|
1120 }
|
|
|
1121
|
|
|
1122 return NGX_CONF_OK;
|
|
|
1123 }
|
|
|
1124
|
|
|
1125
|
|
|
1126 static char *
|
|
76
|
1127 ngx_http_gzip_types(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
50
|
1128 {
|
|
|
1129 ngx_http_gzip_conf_t *gcf = conf;
|
|
|
1130
|
|
76
|
1131 ngx_str_t *value, *type;
|
|
|
1132 ngx_uint_t i;
|
|
50
|
1133
|
|
|
1134 if (gcf->types == NULL) {
|
|
76
|
1135 gcf->types = ngx_array_create(cf->pool, 4, sizeof(ngx_str_t));
|
|
50
|
1136 if (gcf->types == NULL) {
|
|
|
1137 return NGX_CONF_ERROR;
|
|
|
1138 }
|
|
|
1139
|
|
|
1140 type = ngx_array_push(gcf->types);
|
|
|
1141 if (type == NULL) {
|
|
|
1142 return NGX_CONF_ERROR;
|
|
|
1143 }
|
|
|
1144
|
|
76
|
1145 type->len = sizeof("text/html") - 1;
|
|
|
1146 type->data = (u_char *) "text/html";
|
|
50
|
1147 }
|
|
|
1148
|
|
|
1149 value = cf->args->elts;
|
|
|
1150
|
|
|
1151 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
1152
|
|
|
1153 if (ngx_strcmp(value[i].data, "text/html") == 0) {
|
|
|
1154 continue;
|
|
|
1155 }
|
|
|
1156
|
|
|
1157 type = ngx_array_push(gcf->types);
|
|
|
1158 if (type == NULL) {
|
|
|
1159 return NGX_CONF_ERROR;
|
|
|
1160 }
|
|
|
1161
|
|
76
|
1162 type->len = value[i].len;
|
|
50
|
1163
|
|
76
|
1164 type->data = ngx_palloc(cf->pool, type->len + 1);
|
|
|
1165 if (type->data == NULL) {
|
|
50
|
1166 return NGX_CONF_ERROR;
|
|
|
1167 }
|
|
|
1168
|
|
76
|
1169 ngx_cpystrn(type->data, value[i].data, type->len + 1);
|
|
50
|
1170 }
|
|
|
1171
|
|
|
1172 return NGX_CONF_OK;
|
|
|
1173 }
|
|
|
1174
|
|
|
1175
|
|
|
1176 static char *
|
|
76
|
1177 ngx_http_gzip_window(ngx_conf_t *cf, void *post, void *data)
|
|
50
|
1178 {
|
|
|
1179 int *np = data;
|
|
|
1180
|
|
|
1181 int wbits, wsize;
|
|
|
1182
|
|
|
1183 wbits = 15;
|
|
|
1184
|
|
|
1185 for (wsize = 32 * 1024; wsize > 256; wsize >>= 1) {
|
|
|
1186
|
|
|
1187 if (wsize == *np) {
|
|
|
1188 *np = wbits;
|
|
|
1189
|
|
|
1190 return NGX_CONF_OK;
|
|
|
1191 }
|
|
|
1192
|
|
|
1193 wbits--;
|
|
|
1194 }
|
|
|
1195
|
|
|
1196 return "must be 512, 1k, 2k, 4k, 8k, 16k, or 32k";
|
|
|
1197 }
|
|
|
1198
|
|
|
1199
|
|
|
1200 static char *
|
|
76
|
1201 ngx_http_gzip_hash(ngx_conf_t *cf, void *post, void *data)
|
|
50
|
1202 {
|
|
|
1203 int *np = data;
|
|
|
1204
|
|
|
1205 int memlevel, hsize;
|
|
|
1206
|
|
|
1207 memlevel = 9;
|
|
|
1208
|
|
|
1209 for (hsize = 128 * 1024; hsize > 256; hsize >>= 1) {
|
|
|
1210
|
|
|
1211 if (hsize == *np) {
|
|
|
1212 *np = memlevel;
|
|
|
1213
|
|
|
1214 return NGX_CONF_OK;
|
|
|
1215 }
|
|
|
1216
|
|
|
1217 memlevel--;
|
|
|
1218 }
|
|
|
1219
|
|
|
1220 return "must be 512, 1k, 2k, 4k, 8k, 16k, 32k, 64k, or 128k";
|
|
|
1221 }
|
