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