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50
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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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394
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18 ngx_hash_t types;
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50
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19
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20 ngx_bufs_t bufs;
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21
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138
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22 ngx_int_t level;
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23 size_t wbits;
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24 size_t memlevel;
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25 ssize_t min_length;
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394
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26
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27 ngx_array_t *types_keys;
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50
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28 } ngx_http_gzip_conf_t;
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29
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30
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31 typedef struct {
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32 ngx_chain_t *in;
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33 ngx_chain_t *free;
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34 ngx_chain_t *busy;
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35 ngx_chain_t *out;
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36 ngx_chain_t **last_out;
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432
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37
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38 ngx_chain_t *copied;
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39 ngx_chain_t *copy_buf;
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40
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50
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41 ngx_buf_t *in_buf;
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42 ngx_buf_t *out_buf;
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43 ngx_int_t bufs;
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44
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45 void *preallocated;
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46 char *free_mem;
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47 ngx_uint_t allocated;
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48
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432
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49 int wbits;
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50 int memlevel;
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51
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50
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52 unsigned flush:4;
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53 unsigned redo:1;
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54 unsigned done:1;
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416
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55 unsigned nomem:1;
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56 unsigned gzheader:1;
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432
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57 unsigned buffering:1;
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50
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58
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59 size_t zin;
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60 size_t zout;
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61
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62 uint32_t crc32;
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63 z_stream zstream;
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64 ngx_http_request_t *request;
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65 } ngx_http_gzip_ctx_t;
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66
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67
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416
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68 #if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
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69
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70 struct gztrailer {
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71 uint32_t crc32;
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72 uint32_t zlen;
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73 };
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74
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75 #else /* NGX_HAVE_BIG_ENDIAN || !NGX_HAVE_NONALIGNED */
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76
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77 struct gztrailer {
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78 u_char crc32[4];
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79 u_char zlen[4];
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80 };
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81
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82 #endif
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83
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84
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432
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85 static void ngx_http_gzip_filter_memory(ngx_http_request_t *r,
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86 ngx_http_gzip_ctx_t *ctx);
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87 static ngx_int_t ngx_http_gzip_filter_copy_recycled(ngx_http_gzip_ctx_t *ctx,
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88 ngx_chain_t *in);
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416
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89 static ngx_int_t ngx_http_gzip_filter_deflate_start(ngx_http_request_t *r,
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90 ngx_http_gzip_ctx_t *ctx);
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91 static ngx_int_t ngx_http_gzip_filter_gzheader(ngx_http_request_t *r,
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92 ngx_http_gzip_ctx_t *ctx);
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93 static ngx_int_t ngx_http_gzip_filter_add_data(ngx_http_request_t *r,
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94 ngx_http_gzip_ctx_t *ctx);
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95 static ngx_int_t ngx_http_gzip_filter_get_buf(ngx_http_request_t *r,
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96 ngx_http_gzip_ctx_t *ctx);
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97 static ngx_int_t ngx_http_gzip_filter_deflate(ngx_http_request_t *r,
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98 ngx_http_gzip_ctx_t *ctx);
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99 static ngx_int_t ngx_http_gzip_filter_deflate_end(ngx_http_request_t *r,
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100 ngx_http_gzip_ctx_t *ctx);
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101
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50
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102 static void *ngx_http_gzip_filter_alloc(void *opaque, u_int items,
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103 u_int size);
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104 static void ngx_http_gzip_filter_free(void *opaque, void *address);
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432
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105 static void ngx_http_gzip_filter_free_copy_buf(ngx_http_request_t *r,
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106 ngx_http_gzip_ctx_t *ctx);
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107
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122
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108 static ngx_int_t ngx_http_gzip_add_variables(ngx_conf_t *cf);
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109 static ngx_int_t ngx_http_gzip_ratio_variable(ngx_http_request_t *r,
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110 ngx_http_variable_value_t *v, uintptr_t data);
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111
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230
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112 static ngx_int_t ngx_http_gzip_filter_init(ngx_conf_t *cf);
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50
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113 static void *ngx_http_gzip_create_conf(ngx_conf_t *cf);
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114 static char *ngx_http_gzip_merge_conf(ngx_conf_t *cf,
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115 void *parent, void *child);
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76
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116 static char *ngx_http_gzip_window(ngx_conf_t *cf, void *post, void *data);
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117 static char *ngx_http_gzip_hash(ngx_conf_t *cf, void *post, void *data);
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118
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119
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120 static ngx_conf_num_bounds_t ngx_http_gzip_comp_level_bounds = {
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121 ngx_conf_check_num_bounds, 1, 9
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122 };
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123
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76
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124 static ngx_conf_post_handler_pt ngx_http_gzip_window_p = ngx_http_gzip_window;
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125 static ngx_conf_post_handler_pt ngx_http_gzip_hash_p = ngx_http_gzip_hash;
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126
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127
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128 static ngx_command_t ngx_http_gzip_filter_commands[] = {
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129
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130 { ngx_string("gzip"),
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131 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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132 |NGX_CONF_FLAG,
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133 ngx_conf_set_flag_slot,
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134 NGX_HTTP_LOC_CONF_OFFSET,
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135 offsetof(ngx_http_gzip_conf_t, enable),
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136 NULL },
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137
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138 { ngx_string("gzip_buffers"),
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139 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
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140 ngx_conf_set_bufs_slot,
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141 NGX_HTTP_LOC_CONF_OFFSET,
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142 offsetof(ngx_http_gzip_conf_t, bufs),
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143 NULL },
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144
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145 { ngx_string("gzip_types"),
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146 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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394
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147 ngx_http_types_slot,
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50
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148 NGX_HTTP_LOC_CONF_OFFSET,
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394
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149 offsetof(ngx_http_gzip_conf_t, types_keys),
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150 &ngx_http_html_default_types[0] },
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151
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152 { ngx_string("gzip_comp_level"),
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153 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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154 ngx_conf_set_num_slot,
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155 NGX_HTTP_LOC_CONF_OFFSET,
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156 offsetof(ngx_http_gzip_conf_t, level),
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157 &ngx_http_gzip_comp_level_bounds },
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158
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159 { ngx_string("gzip_window"),
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160 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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161 ngx_conf_set_size_slot,
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162 NGX_HTTP_LOC_CONF_OFFSET,
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163 offsetof(ngx_http_gzip_conf_t, wbits),
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164 &ngx_http_gzip_window_p },
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165
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166 { ngx_string("gzip_hash"),
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167 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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168 ngx_conf_set_size_slot,
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169 NGX_HTTP_LOC_CONF_OFFSET,
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170 offsetof(ngx_http_gzip_conf_t, memlevel),
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76
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171 &ngx_http_gzip_hash_p },
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172
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173 { ngx_string("gzip_no_buffer"),
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174 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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175 ngx_conf_set_flag_slot,
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176 NGX_HTTP_LOC_CONF_OFFSET,
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177 offsetof(ngx_http_gzip_conf_t, no_buffer),
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178 NULL },
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179
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180 { ngx_string("gzip_min_length"),
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181 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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182 ngx_conf_set_size_slot,
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183 NGX_HTTP_LOC_CONF_OFFSET,
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184 offsetof(ngx_http_gzip_conf_t, min_length),
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185 NULL },
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186
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187 ngx_null_command
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188 };
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189
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190
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191 static ngx_http_module_t ngx_http_gzip_filter_module_ctx = {
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122
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192 ngx_http_gzip_add_variables, /* preconfiguration */
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230
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193 ngx_http_gzip_filter_init, /* postconfiguration */
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194
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195 NULL, /* create main configuration */
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196 NULL, /* init main configuration */
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197
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198 NULL, /* create server configuration */
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199 NULL, /* merge server configuration */
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200
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201 ngx_http_gzip_create_conf, /* create location configuration */
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202 ngx_http_gzip_merge_conf /* merge location configuration */
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203 };
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204
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205
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206 ngx_module_t ngx_http_gzip_filter_module = {
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58
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207 NGX_MODULE_V1,
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208 &ngx_http_gzip_filter_module_ctx, /* module context */
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209 ngx_http_gzip_filter_commands, /* module directives */
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210 NGX_HTTP_MODULE, /* module type */
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90
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211 NULL, /* init master */
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230
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212 NULL, /* init module */
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90
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213 NULL, /* init process */
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214 NULL, /* init thread */
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215 NULL, /* exit thread */
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216 NULL, /* exit process */
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217 NULL, /* exit master */
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218 NGX_MODULE_V1_PADDING
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50
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219 };
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220
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221
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122
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222 static ngx_str_t ngx_http_gzip_ratio = ngx_string("gzip_ratio");
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58
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223
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50
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224 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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225 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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226
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227
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228 static ngx_int_t
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229 ngx_http_gzip_header_filter(ngx_http_request_t *r)
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230 {
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382
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231 ngx_table_elt_t *h;
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232 ngx_http_gzip_ctx_t *ctx;
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233 ngx_http_gzip_conf_t *conf;
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50
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234
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235 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
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236
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237 if (!conf->enable
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238 || (r->headers_out.status != NGX_HTTP_OK
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239 && r->headers_out.status != NGX_HTTP_FORBIDDEN
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240 && r->headers_out.status != NGX_HTTP_NOT_FOUND)
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241 || r->header_only
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242 || (r->headers_out.content_encoding
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243 && r->headers_out.content_encoding->value.len)
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244 || (r->headers_out.content_length_n != -1
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245 && r->headers_out.content_length_n < conf->min_length)
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394
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246 || ngx_http_test_content_type(r, &conf->types) == NULL
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358
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247 || ngx_http_gzip_ok(r) != NGX_OK)
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50
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248 {
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249 return ngx_http_next_header_filter(r);
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250 }
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251
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252 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_gzip_ctx_t));
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253 if (ctx == NULL) {
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254 return NGX_ERROR;
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255 }
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256
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257 ngx_http_set_ctx(r, ctx, ngx_http_gzip_filter_module);
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258
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259 ctx->request = r;
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432
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260 ctx->buffering = 1;
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261
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262 ngx_http_gzip_filter_memory(r, ctx);
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263
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358
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264 h = ngx_list_push(&r->headers_out.headers);
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265 if (h == NULL) {
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266 return NGX_ERROR;
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267 }
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268
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358
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269 h->hash = 1;
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270 h->key.len = sizeof("Content-Encoding") - 1;
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271 h->key.data = (u_char *) "Content-Encoding";
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272 h->value.len = sizeof("gzip") - 1;
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273 h->value.data = (u_char *) "gzip";
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342
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274
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358
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275 r->headers_out.content_encoding = h;
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276
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62
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277 r->main_filter_need_in_memory = 1;
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50
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278
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126
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279 ngx_http_clear_content_length(r);
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280 ngx_http_clear_accept_ranges(r);
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281
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282 return ngx_http_next_header_filter(r);
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283 }
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284
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285
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286 static ngx_int_t
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287 ngx_http_gzip_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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288 {
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416
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289 int rc;
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290 ngx_chain_t *cl;
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291 ngx_http_gzip_ctx_t *ctx;
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50
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292
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293 ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module);
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294
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295 if (ctx == NULL || ctx->done) {
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296 return ngx_http_next_body_filter(r, in);
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297 }
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298
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432
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299 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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300 "http gzip filter");
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301
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302 if (ctx->buffering) {
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303
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304 if (in) {
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440
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305 switch (ngx_http_gzip_filter_copy_recycled(ctx, in)) {
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432
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306
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440
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307 case NGX_OK:
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308 return NGX_OK;
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432
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309
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440
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310 case NGX_DONE:
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311 in = NULL;
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312 break;
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432
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313
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440
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314 default: /* NGX_ERROR */
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315 goto failed;
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316 }
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432
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317
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318 } else {
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319 ctx->buffering = 0;
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320 }
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321 }
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322
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50
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323 if (ctx->preallocated == NULL) {
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416
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324 if (ngx_http_gzip_filter_deflate_start(r, ctx) != NGX_OK) {
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325 goto failed;
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50
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326 }
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327 }
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328
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329 if (in) {
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330 if (ngx_chain_add_copy(r->pool, &ctx->in, in) == NGX_ERROR) {
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416
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331 goto failed;
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50
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332 }
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333 }
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334
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416
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335 if (ctx->nomem) {
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336
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337 /* flush busy buffers */
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338
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339 if (ngx_http_next_body_filter(r, NULL) == NGX_ERROR) {
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340 goto failed;
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341 }
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342
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343 cl = NULL;
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344
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345 ngx_chain_update_chains(&ctx->free, &ctx->busy, &cl,
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346 (ngx_buf_tag_t) &ngx_http_gzip_filter_module);
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347 ctx->nomem = 0;
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348 }
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50
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349
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350 for ( ;; ) {
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351
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416
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352 /* cycle while we can write to a client */
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353
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50
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354 for ( ;; ) {
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355
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416
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356 /* cycle while there is data to feed zlib and ... */
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50
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357
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416
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358 rc = ngx_http_gzip_filter_add_data(r, ctx);
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50
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359
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416
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360 if (rc == NGX_DECLINED) {
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361 break;
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362 }
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50
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363
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416
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364 if (rc == NGX_AGAIN) {
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365 continue;
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50
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366 }
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367
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368
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416
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369 /* ... there are buffers to write zlib output */
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50
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370
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416
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371 rc = ngx_http_gzip_filter_get_buf(r, ctx);
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50
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372
|
|
416
|
373 if (rc == NGX_DECLINED) {
|
|
|
374 break;
|
|
50
|
375 }
|
|
|
376
|
|
416
|
377 if (rc == NGX_ERROR) {
|
|
|
378 goto failed;
|
|
50
|
379 }
|
|
|
380
|
|
|
381
|
|
416
|
382 rc = ngx_http_gzip_filter_deflate(r, ctx);
|
|
50
|
383
|
|
416
|
384 if (rc == NGX_OK) {
|
|
50
|
385 break;
|
|
|
386 }
|
|
|
387
|
|
416
|
388 if (rc == NGX_ERROR) {
|
|
|
389 goto failed;
|
|
50
|
390 }
|
|
|
391
|
|
416
|
392 /* rc == NGX_AGAIN */
|
|
|
393 }
|
|
50
|
394
|
|
416
|
395 if (ctx->out == NULL) {
|
|
432
|
396 ngx_http_gzip_filter_free_copy_buf(r, ctx);
|
|
|
397
|
|
416
|
398 return ctx->busy ? NGX_AGAIN : NGX_OK;
|
|
|
399 }
|
|
50
|
400
|
|
416
|
401 if (!ctx->gzheader) {
|
|
|
402 if (ngx_http_gzip_filter_gzheader(r, ctx) != NGX_OK) {
|
|
|
403 goto failed;
|
|
50
|
404 }
|
|
|
405 }
|
|
|
406
|
|
416
|
407 rc = ngx_http_next_body_filter(r, ctx->out);
|
|
50
|
408
|
|
416
|
409 if (rc == NGX_ERROR) {
|
|
|
410 goto failed;
|
|
50
|
411 }
|
|
|
412
|
|
432
|
413 ngx_http_gzip_filter_free_copy_buf(r, ctx);
|
|
|
414
|
|
50
|
415 ngx_chain_update_chains(&ctx->free, &ctx->busy, &ctx->out,
|
|
|
416 (ngx_buf_tag_t) &ngx_http_gzip_filter_module);
|
|
|
417 ctx->last_out = &ctx->out;
|
|
|
418
|
|
416
|
419 ctx->nomem = 0;
|
|
|
420
|
|
50
|
421 if (ctx->done) {
|
|
416
|
422 return rc;
|
|
|
423 }
|
|
|
424 }
|
|
|
425
|
|
|
426 /* unreachable */
|
|
|
427
|
|
|
428 failed:
|
|
|
429
|
|
|
430 ctx->done = 1;
|
|
|
431
|
|
|
432 if (ctx->preallocated) {
|
|
|
433 deflateEnd(&ctx->zstream);
|
|
|
434
|
|
|
435 ngx_pfree(r->pool, ctx->preallocated);
|
|
|
436 }
|
|
|
437
|
|
432
|
438 ngx_http_gzip_filter_free_copy_buf(r, ctx);
|
|
|
439
|
|
416
|
440 return NGX_ERROR;
|
|
|
441 }
|
|
|
442
|
|
|
443
|
|
432
|
444 static void
|
|
|
445 ngx_http_gzip_filter_memory(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
|
416
|
446 {
|
|
432
|
447 int wbits, memlevel;
|
|
416
|
448 ngx_http_gzip_conf_t *conf;
|
|
|
449
|
|
|
450 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
|
451
|
|
|
452 wbits = conf->wbits;
|
|
|
453 memlevel = conf->memlevel;
|
|
|
454
|
|
432
|
455 if (r->headers_out.content_length_n > 0) {
|
|
416
|
456
|
|
|
457 /* the actual zlib window size is smaller by 262 bytes */
|
|
|
458
|
|
432
|
459 while (r->headers_out.content_length_n < ((1 << (wbits - 1)) - 262)) {
|
|
416
|
460 wbits--;
|
|
|
461 memlevel--;
|
|
50
|
462 }
|
|
|
463 }
|
|
416
|
464
|
|
432
|
465 ctx->wbits = wbits;
|
|
|
466 ctx->memlevel = memlevel;
|
|
|
467
|
|
416
|
468 /*
|
|
|
469 * We preallocate a memory for zlib in one buffer (200K-400K), this
|
|
|
470 * decreases a number of malloc() and free() calls and also probably
|
|
|
471 * decreases a number of syscalls (sbrk()/mmap() and so on).
|
|
|
472 * Besides we free the memory as soon as a gzipping will complete
|
|
|
473 * and do not wait while a whole response will be sent to a client.
|
|
|
474 *
|
|
|
475 * 8K is for zlib deflate_state, it takes
|
|
|
476 * *) 5816 bytes on i386 and sparc64 (32-bit mode)
|
|
|
477 * *) 5920 bytes on amd64 and sparc64
|
|
|
478 */
|
|
|
479
|
|
|
480 ctx->allocated = 8192 + (1 << (wbits + 2)) + (1 << (memlevel + 9));
|
|
432
|
481 }
|
|
|
482
|
|
|
483
|
|
|
484 static ngx_int_t
|
|
|
485 ngx_http_gzip_filter_copy_recycled(ngx_http_gzip_ctx_t *ctx, ngx_chain_t *in)
|
|
|
486 {
|
|
|
487 size_t size, buffered;
|
|
|
488 ngx_buf_t *b, *buf;
|
|
|
489 ngx_chain_t *cl, **ll;
|
|
|
490 ngx_http_request_t *r;
|
|
|
491
|
|
|
492 r = ctx->request;
|
|
|
493
|
|
|
494 r->connection->buffered |= NGX_HTTP_GZIP_BUFFERED;
|
|
|
495
|
|
|
496 buffered = 0;
|
|
|
497 ll = &ctx->in;
|
|
|
498
|
|
|
499 for (cl = ctx->in; cl; cl = cl->next) {
|
|
|
500 buffered += cl->buf->last - cl->buf->pos;
|
|
|
501 ll = &cl->next;
|
|
|
502 }
|
|
|
503
|
|
|
504 while (in) {
|
|
|
505 cl = ngx_alloc_chain_link(r->pool);
|
|
|
506 if (cl == NULL) {
|
|
|
507 return NGX_ERROR;
|
|
|
508 }
|
|
|
509
|
|
|
510 b = in->buf;
|
|
|
511
|
|
|
512 size = b->last - b->pos;
|
|
|
513 buffered += size;
|
|
|
514
|
|
|
515 if (b->flush || b->last_buf) {
|
|
|
516 ctx->buffering = 0;
|
|
|
517
|
|
|
518 } else if (buffered > ctx->allocated / 2) {
|
|
|
519
|
|
|
520 /*
|
|
|
521 * With default memory settings zlib starts to output gzipped data
|
|
|
522 * only after it has got about 90K, so it makes sense to allocate
|
|
|
523 * zlib memory (200-400K) only after we have enough data
|
|
|
524 * to compress. Although we copy recycled buffers, nevertheless
|
|
|
525 * for responses up to 120K this allows to allocate zlib memory,
|
|
|
526 * to compress and to output the response in one step
|
|
|
527 * using hot CPU cache.
|
|
|
528 */
|
|
|
529
|
|
|
530 ctx->buffering = 0;
|
|
|
531 }
|
|
|
532
|
|
|
533 if (ctx->buffering && size && b->recycled) {
|
|
|
534
|
|
|
535 buf = ngx_create_temp_buf(r->pool, size);
|
|
|
536 if (buf == NULL) {
|
|
|
537 return NGX_ERROR;
|
|
|
538 }
|
|
|
539
|
|
|
540 buf->last = ngx_cpymem(buf->pos, b->pos, size);
|
|
|
541 b->pos = b->last;
|
|
|
542
|
|
|
543 buf->last_buf = b->last_buf;
|
|
|
544 buf->tag = (ngx_buf_tag_t) &ngx_http_gzip_filter_module;
|
|
|
545
|
|
|
546 cl->buf = buf;
|
|
|
547
|
|
|
548 } else {
|
|
|
549 cl->buf = b;
|
|
|
550 }
|
|
|
551
|
|
|
552 *ll = cl;
|
|
|
553 ll = &cl->next;
|
|
|
554 in = in->next;
|
|
|
555 }
|
|
|
556
|
|
|
557 *ll = NULL;
|
|
|
558
|
|
|
559 return ctx->buffering ? NGX_OK : NGX_DONE;
|
|
|
560 }
|
|
|
561
|
|
|
562
|
|
|
563 static ngx_int_t
|
|
|
564 ngx_http_gzip_filter_deflate_start(ngx_http_request_t *r,
|
|
|
565 ngx_http_gzip_ctx_t *ctx)
|
|
|
566 {
|
|
|
567 int rc;
|
|
|
568 ngx_http_gzip_conf_t *conf;
|
|
|
569
|
|
|
570 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
416
|
571
|
|
|
572 ctx->preallocated = ngx_palloc(r->pool, ctx->allocated);
|
|
|
573 if (ctx->preallocated == NULL) {
|
|
|
574 return NGX_ERROR;
|
|
|
575 }
|
|
|
576
|
|
|
577 ctx->free_mem = ctx->preallocated;
|
|
|
578
|
|
|
579 ctx->zstream.zalloc = ngx_http_gzip_filter_alloc;
|
|
|
580 ctx->zstream.zfree = ngx_http_gzip_filter_free;
|
|
|
581 ctx->zstream.opaque = ctx;
|
|
|
582
|
|
|
583 rc = deflateInit2(&ctx->zstream, (int) conf->level, Z_DEFLATED,
|
|
432
|
584 - ctx->wbits, ctx->memlevel, Z_DEFAULT_STRATEGY);
|
|
416
|
585
|
|
|
586 if (rc != Z_OK) {
|
|
|
587 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
588 "deflateInit2() failed: %d", rc);
|
|
|
589 return NGX_ERROR;
|
|
|
590 }
|
|
|
591
|
|
|
592 ctx->last_out = &ctx->out;
|
|
|
593 ctx->crc32 = crc32(0L, Z_NULL, 0);
|
|
|
594 ctx->flush = Z_NO_FLUSH;
|
|
|
595
|
|
|
596 return NGX_OK;
|
|
|
597 }
|
|
|
598
|
|
|
599
|
|
|
600 static ngx_int_t
|
|
|
601 ngx_http_gzip_filter_gzheader(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
|
|
602 {
|
|
|
603 ngx_buf_t *b;
|
|
|
604 ngx_chain_t *cl;
|
|
|
605 static u_char gzheader[10] =
|
|
|
606 { 0x1f, 0x8b, Z_DEFLATED, 0, 0, 0, 0, 0, 0, 3 };
|
|
|
607
|
|
|
608 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
609 if (b == NULL) {
|
|
|
610 return NGX_ERROR;
|
|
|
611 }
|
|
|
612
|
|
|
613 b->memory = 1;
|
|
|
614 b->pos = gzheader;
|
|
|
615 b->last = b->pos + 10;
|
|
|
616
|
|
|
617 cl = ngx_alloc_chain_link(r->pool);
|
|
|
618 if (cl == NULL) {
|
|
|
619 return NGX_ERROR;
|
|
|
620 }
|
|
|
621
|
|
|
622 cl->buf = b;
|
|
|
623 cl->next = ctx->out;
|
|
|
624 ctx->out = cl;
|
|
|
625
|
|
|
626 ctx->gzheader = 1;
|
|
|
627
|
|
|
628 return NGX_OK;
|
|
|
629 }
|
|
|
630
|
|
|
631
|
|
|
632 static ngx_int_t
|
|
|
633 ngx_http_gzip_filter_add_data(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
|
|
634 {
|
|
|
635 if (ctx->zstream.avail_in || ctx->flush != Z_NO_FLUSH || ctx->redo) {
|
|
|
636 return NGX_OK;
|
|
|
637 }
|
|
|
638
|
|
|
639 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
640 "gzip in: %p", ctx->in);
|
|
|
641
|
|
|
642 if (ctx->in == NULL) {
|
|
|
643 return NGX_DECLINED;
|
|
|
644 }
|
|
|
645
|
|
432
|
646 if (ctx->copy_buf) {
|
|
|
647
|
|
|
648 /*
|
|
|
649 * to avoid CPU cache trashing we do not free() just quit buf,
|
|
|
650 * but postpone free()ing after zlib compressing and data output
|
|
|
651 */
|
|
|
652
|
|
|
653 ctx->copy_buf->next = ctx->copied;
|
|
|
654 ctx->copied = ctx->copy_buf;
|
|
|
655 ctx->copy_buf = NULL;
|
|
|
656 }
|
|
|
657
|
|
416
|
658 ctx->in_buf = ctx->in->buf;
|
|
432
|
659
|
|
|
660 if (ctx->in_buf->tag == (ngx_buf_tag_t) &ngx_http_gzip_filter_module) {
|
|
|
661 ctx->copy_buf = ctx->in;
|
|
|
662 }
|
|
|
663
|
|
416
|
664 ctx->in = ctx->in->next;
|
|
|
665
|
|
|
666 ctx->zstream.next_in = ctx->in_buf->pos;
|
|
|
667 ctx->zstream.avail_in = ctx->in_buf->last - ctx->in_buf->pos;
|
|
|
668
|
|
|
669 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
670 "gzip in_buf:%p ni:%p ai:%ud",
|
|
|
671 ctx->in_buf,
|
|
|
672 ctx->zstream.next_in, ctx->zstream.avail_in);
|
|
|
673
|
|
|
674 if (ctx->in_buf->last_buf) {
|
|
|
675 ctx->flush = Z_FINISH;
|
|
|
676
|
|
|
677 } else if (ctx->in_buf->flush) {
|
|
|
678 ctx->flush = Z_SYNC_FLUSH;
|
|
|
679 }
|
|
|
680
|
|
|
681 if (ctx->zstream.avail_in) {
|
|
|
682
|
|
|
683 ctx->crc32 = crc32(ctx->crc32, ctx->zstream.next_in,
|
|
|
684 ctx->zstream.avail_in);
|
|
|
685
|
|
|
686 } else if (ctx->flush == Z_NO_FLUSH) {
|
|
|
687 return NGX_AGAIN;
|
|
|
688 }
|
|
|
689
|
|
|
690 return NGX_OK;
|
|
|
691 }
|
|
|
692
|
|
|
693
|
|
|
694 static ngx_int_t
|
|
|
695 ngx_http_gzip_filter_get_buf(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
|
|
696 {
|
|
|
697 ngx_http_gzip_conf_t *conf;
|
|
|
698
|
|
|
699 if (ctx->zstream.avail_out) {
|
|
|
700 return NGX_OK;
|
|
|
701 }
|
|
|
702
|
|
|
703 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
|
704
|
|
|
705 if (ctx->free) {
|
|
|
706 ctx->out_buf = ctx->free->buf;
|
|
|
707 ctx->free = ctx->free->next;
|
|
|
708
|
|
|
709 } else if (ctx->bufs < conf->bufs.num) {
|
|
|
710
|
|
|
711 ctx->out_buf = ngx_create_temp_buf(r->pool, conf->bufs.size);
|
|
|
712 if (ctx->out_buf == NULL) {
|
|
|
713 return NGX_ERROR;
|
|
|
714 }
|
|
|
715
|
|
|
716 ctx->out_buf->tag = (ngx_buf_tag_t) &ngx_http_gzip_filter_module;
|
|
|
717 ctx->out_buf->recycled = 1;
|
|
|
718 ctx->bufs++;
|
|
|
719
|
|
|
720 } else {
|
|
|
721 ctx->nomem = 1;
|
|
|
722 return NGX_DECLINED;
|
|
|
723 }
|
|
|
724
|
|
|
725 ctx->zstream.next_out = ctx->out_buf->pos;
|
|
|
726 ctx->zstream.avail_out = conf->bufs.size;
|
|
|
727
|
|
|
728 return NGX_OK;
|
|
|
729 }
|
|
|
730
|
|
|
731
|
|
|
732 static ngx_int_t
|
|
|
733 ngx_http_gzip_filter_deflate(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
|
|
734 {
|
|
|
735 int rc;
|
|
|
736 ngx_chain_t *cl;
|
|
|
737 ngx_http_gzip_conf_t *conf;
|
|
|
738
|
|
|
739 ngx_log_debug6(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
740 "deflate in: ni:%p no:%p ai:%ud ao:%ud fl:%d redo:%d",
|
|
|
741 ctx->zstream.next_in, ctx->zstream.next_out,
|
|
|
742 ctx->zstream.avail_in, ctx->zstream.avail_out,
|
|
|
743 ctx->flush, ctx->redo);
|
|
|
744
|
|
|
745 rc = deflate(&ctx->zstream, ctx->flush);
|
|
|
746
|
|
|
747 if (rc != Z_OK && rc != Z_STREAM_END) {
|
|
|
748 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
749 "deflate() failed: %d, %d", ctx->flush, rc);
|
|
|
750 return NGX_ERROR;
|
|
|
751 }
|
|
|
752
|
|
|
753 ngx_log_debug5(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
754 "deflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d",
|
|
|
755 ctx->zstream.next_in, ctx->zstream.next_out,
|
|
|
756 ctx->zstream.avail_in, ctx->zstream.avail_out,
|
|
|
757 rc);
|
|
|
758
|
|
|
759 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
760 "gzip in_buf:%p pos:%p",
|
|
|
761 ctx->in_buf, ctx->in_buf->pos);
|
|
|
762
|
|
|
763 if (ctx->zstream.next_in) {
|
|
|
764 ctx->in_buf->pos = ctx->zstream.next_in;
|
|
|
765
|
|
|
766 if (ctx->zstream.avail_in == 0) {
|
|
|
767 ctx->zstream.next_in = NULL;
|
|
|
768 }
|
|
|
769 }
|
|
|
770
|
|
|
771 ctx->out_buf->last = ctx->zstream.next_out;
|
|
|
772
|
|
|
773 if (ctx->zstream.avail_out == 0) {
|
|
|
774
|
|
|
775 /* zlib wants to output some more gzipped data */
|
|
|
776
|
|
|
777 cl = ngx_alloc_chain_link(r->pool);
|
|
|
778 if (cl == NULL) {
|
|
|
779 return NGX_ERROR;
|
|
|
780 }
|
|
|
781
|
|
|
782 cl->buf = ctx->out_buf;
|
|
|
783 cl->next = NULL;
|
|
|
784 *ctx->last_out = cl;
|
|
|
785 ctx->last_out = &cl->next;
|
|
|
786
|
|
|
787 ctx->redo = 1;
|
|
|
788
|
|
|
789 return NGX_AGAIN;
|
|
|
790 }
|
|
|
791
|
|
|
792 ctx->redo = 0;
|
|
|
793
|
|
|
794 if (ctx->flush == Z_SYNC_FLUSH) {
|
|
|
795
|
|
|
796 ctx->zstream.avail_out = 0;
|
|
|
797 ctx->out_buf->flush = 1;
|
|
|
798 ctx->flush = Z_NO_FLUSH;
|
|
|
799
|
|
|
800 cl = ngx_alloc_chain_link(r->pool);
|
|
|
801 if (cl == NULL) {
|
|
|
802 return NGX_ERROR;
|
|
|
803 }
|
|
|
804
|
|
|
805 cl->buf = ctx->out_buf;
|
|
|
806 cl->next = NULL;
|
|
|
807 *ctx->last_out = cl;
|
|
|
808 ctx->last_out = &cl->next;
|
|
|
809
|
|
|
810 return NGX_OK;
|
|
|
811 }
|
|
|
812
|
|
|
813 if (rc == Z_STREAM_END) {
|
|
|
814
|
|
|
815 if (ngx_http_gzip_filter_deflate_end(r, ctx) != NGX_OK) {
|
|
|
816 return NGX_ERROR;
|
|
|
817 }
|
|
|
818
|
|
|
819 return NGX_OK;
|
|
|
820 }
|
|
|
821
|
|
|
822 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
|
823
|
|
|
824 if (conf->no_buffer && ctx->in == NULL) {
|
|
|
825
|
|
|
826 cl = ngx_alloc_chain_link(r->pool);
|
|
|
827 if (cl == NULL) {
|
|
|
828 return NGX_ERROR;
|
|
|
829 }
|
|
|
830
|
|
|
831 cl->buf = ctx->out_buf;
|
|
|
832 cl->next = NULL;
|
|
|
833 *ctx->last_out = cl;
|
|
|
834 ctx->last_out = &cl->next;
|
|
|
835
|
|
|
836 return NGX_OK;
|
|
|
837 }
|
|
|
838
|
|
|
839 return NGX_AGAIN;
|
|
|
840 }
|
|
|
841
|
|
|
842
|
|
|
843 static ngx_int_t
|
|
|
844 ngx_http_gzip_filter_deflate_end(ngx_http_request_t *r,
|
|
|
845 ngx_http_gzip_ctx_t *ctx)
|
|
|
846 {
|
|
|
847 int rc;
|
|
|
848 ngx_buf_t *b;
|
|
|
849 ngx_chain_t *cl;
|
|
|
850 struct gztrailer *trailer;
|
|
|
851
|
|
|
852 ctx->zin = ctx->zstream.total_in;
|
|
|
853 ctx->zout = 10 + ctx->zstream.total_out + 8;
|
|
|
854
|
|
|
855 rc = deflateEnd(&ctx->zstream);
|
|
|
856
|
|
|
857 if (rc != Z_OK) {
|
|
|
858 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
859 "deflateEnd() failed: %d", rc);
|
|
|
860 return NGX_ERROR;
|
|
|
861 }
|
|
|
862
|
|
|
863 ngx_pfree(r->pool, ctx->preallocated);
|
|
|
864
|
|
|
865 cl = ngx_alloc_chain_link(r->pool);
|
|
|
866 if (cl == NULL) {
|
|
|
867 return NGX_ERROR;
|
|
|
868 }
|
|
|
869
|
|
|
870 cl->buf = ctx->out_buf;
|
|
|
871 cl->next = NULL;
|
|
|
872 *ctx->last_out = cl;
|
|
|
873 ctx->last_out = &cl->next;
|
|
|
874
|
|
|
875 if (ctx->zstream.avail_out >= 8) {
|
|
|
876 trailer = (struct gztrailer *) ctx->out_buf->last;
|
|
|
877 ctx->out_buf->last += 8;
|
|
|
878 ctx->out_buf->last_buf = 1;
|
|
|
879
|
|
|
880 } else {
|
|
|
881 b = ngx_create_temp_buf(r->pool, 8);
|
|
|
882 if (b == NULL) {
|
|
|
883 return NGX_ERROR;
|
|
|
884 }
|
|
|
885
|
|
|
886 b->last_buf = 1;
|
|
|
887
|
|
|
888 cl = ngx_alloc_chain_link(r->pool);
|
|
|
889 if (cl == NULL) {
|
|
|
890 return NGX_ERROR;
|
|
|
891 }
|
|
|
892
|
|
|
893 cl->buf = b;
|
|
|
894 cl->next = NULL;
|
|
|
895 *ctx->last_out = cl;
|
|
|
896 ctx->last_out = &cl->next;
|
|
|
897 trailer = (struct gztrailer *) b->pos;
|
|
|
898 b->last += 8;
|
|
|
899 }
|
|
|
900
|
|
|
901 #if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
|
|
|
902
|
|
|
903 trailer->crc32 = ctx->crc32;
|
|
|
904 trailer->zlen = ctx->zin;
|
|
|
905
|
|
|
906 #else
|
|
|
907
|
|
|
908 trailer->crc32[0] = (u_char) (ctx->crc32 & 0xff);
|
|
|
909 trailer->crc32[1] = (u_char) ((ctx->crc32 >> 8) & 0xff);
|
|
|
910 trailer->crc32[2] = (u_char) ((ctx->crc32 >> 16) & 0xff);
|
|
|
911 trailer->crc32[3] = (u_char) ((ctx->crc32 >> 24) & 0xff);
|
|
|
912
|
|
|
913 trailer->zlen[0] = (u_char) (ctx->zin & 0xff);
|
|
|
914 trailer->zlen[1] = (u_char) ((ctx->zin >> 8) & 0xff);
|
|
|
915 trailer->zlen[2] = (u_char) ((ctx->zin >> 16) & 0xff);
|
|
|
916 trailer->zlen[3] = (u_char) ((ctx->zin >> 24) & 0xff);
|
|
|
917
|
|
|
918 #endif
|
|
|
919
|
|
|
920 ctx->zstream.avail_in = 0;
|
|
|
921 ctx->zstream.avail_out = 0;
|
|
|
922
|
|
|
923 ctx->done = 1;
|
|
|
924
|
|
|
925 r->connection->buffered &= ~NGX_HTTP_GZIP_BUFFERED;
|
|
|
926
|
|
|
927 return NGX_OK;
|
|
50
|
928 }
|
|
|
929
|
|
|
930
|
|
|
931 static void *
|
|
|
932 ngx_http_gzip_filter_alloc(void *opaque, u_int items, u_int size)
|
|
|
933 {
|
|
|
934 ngx_http_gzip_ctx_t *ctx = opaque;
|
|
|
935
|
|
|
936 void *p;
|
|
|
937 ngx_uint_t alloc;
|
|
|
938
|
|
|
939 alloc = items * size;
|
|
|
940
|
|
434
|
941 if (alloc % 512 != 0 && alloc < 8192) {
|
|
50
|
942
|
|
|
943 /*
|
|
|
944 * The zlib deflate_state allocation, it takes about 6K,
|
|
|
945 * we allocate 8K. Other allocations are divisible by 512.
|
|
|
946 */
|
|
|
947
|
|
434
|
948 alloc = 8192;
|
|
50
|
949 }
|
|
|
950
|
|
|
951 if (alloc <= ctx->allocated) {
|
|
|
952 p = ctx->free_mem;
|
|
|
953 ctx->free_mem += alloc;
|
|
|
954 ctx->allocated -= alloc;
|
|
|
955
|
|
|
956 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0,
|
|
|
957 "gzip alloc: n:%ud s:%ud a:%ud p:%p",
|
|
|
958 items, size, alloc, p);
|
|
|
959
|
|
|
960 return p;
|
|
|
961 }
|
|
|
962
|
|
|
963 ngx_log_error(NGX_LOG_ALERT, ctx->request->connection->log, 0,
|
|
|
964 "gzip filter failed to use preallocated memory: %ud of %ud",
|
|
|
965 items * size, ctx->allocated);
|
|
|
966
|
|
|
967 p = ngx_palloc(ctx->request->pool, items * size);
|
|
|
968
|
|
|
969 return p;
|
|
|
970 }
|
|
|
971
|
|
|
972
|
|
|
973 static void
|
|
|
974 ngx_http_gzip_filter_free(void *opaque, void *address)
|
|
|
975 {
|
|
|
976 #if 0
|
|
|
977 ngx_http_gzip_ctx_t *ctx = opaque;
|
|
|
978
|
|
|
979 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0,
|
|
|
980 "gzip free: %p", address);
|
|
|
981 #endif
|
|
|
982 }
|
|
|
983
|
|
|
984
|
|
432
|
985 static void
|
|
|
986 ngx_http_gzip_filter_free_copy_buf(ngx_http_request_t *r,
|
|
|
987 ngx_http_gzip_ctx_t *ctx)
|
|
|
988 {
|
|
|
989 ngx_chain_t *cl;
|
|
|
990
|
|
|
991 for (cl = ctx->copied; cl; cl = cl->next) {
|
|
|
992 ngx_pfree(r->pool, cl->buf->start);
|
|
|
993 }
|
|
|
994
|
|
|
995 ctx->copied = NULL;
|
|
|
996 }
|
|
|
997
|
|
|
998
|
|
50
|
999 static ngx_int_t
|
|
122
|
1000 ngx_http_gzip_add_variables(ngx_conf_t *cf)
|
|
50
|
1001 {
|
|
260
|
1002 ngx_http_variable_t *var;
|
|
50
|
1003
|
|
132
|
1004 var = ngx_http_add_variable(cf, &ngx_http_gzip_ratio, NGX_HTTP_VAR_NOHASH);
|
|
122
|
1005 if (var == NULL) {
|
|
|
1006 return NGX_ERROR;
|
|
|
1007 }
|
|
|
1008
|
|
186
|
1009 var->get_handler = ngx_http_gzip_ratio_variable;
|
|
122
|
1010
|
|
50
|
1011 return NGX_OK;
|
|
|
1012 }
|
|
|
1013
|
|
|
1014
|
|
|
1015 static ngx_int_t
|
|
122
|
1016 ngx_http_gzip_ratio_variable(ngx_http_request_t *r,
|
|
|
1017 ngx_http_variable_value_t *v, uintptr_t data)
|
|
|
1018 {
|
|
|
1019 ngx_uint_t zint, zfrac;
|
|
|
1020 ngx_http_gzip_ctx_t *ctx;
|
|
|
1021
|
|
126
|
1022 v->valid = 1;
|
|
340
|
1023 v->no_cacheable = 0;
|
|
122
|
1024 v->not_found = 0;
|
|
|
1025
|
|
|
1026 ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module);
|
|
|
1027
|
|
|
1028 if (ctx == NULL || ctx->zout == 0) {
|
|
|
1029 v->not_found = 1;
|
|
|
1030 return NGX_OK;
|
|
|
1031 }
|
|
|
1032
|
|
382
|
1033 v->data = ngx_pnalloc(r->pool, NGX_INT32_LEN + 3);
|
|
122
|
1034 if (v->data == NULL) {
|
|
|
1035 return NGX_ERROR;
|
|
|
1036 }
|
|
|
1037
|
|
|
1038 zint = (ngx_uint_t) (ctx->zin / ctx->zout);
|
|
|
1039 zfrac = (ngx_uint_t) ((ctx->zin * 100 / ctx->zout) % 100);
|
|
|
1040
|
|
|
1041 if ((ctx->zin * 1000 / ctx->zout) % 10 > 4) {
|
|
|
1042
|
|
|
1043 /* the rounding, e.g., 2.125 to 2.13 */
|
|
|
1044
|
|
|
1045 zfrac++;
|
|
|
1046
|
|
|
1047 if (zfrac > 99) {
|
|
|
1048 zint++;
|
|
|
1049 zfrac = 0;
|
|
|
1050 }
|
|
|
1051 }
|
|
|
1052
|
|
|
1053 v->len = ngx_sprintf(v->data, "%ui.%02ui", zint, zfrac) - v->data;
|
|
|
1054
|
|
|
1055 return NGX_OK;
|
|
|
1056 }
|
|
|
1057
|
|
|
1058
|
|
50
|
1059 static void *
|
|
|
1060 ngx_http_gzip_create_conf(ngx_conf_t *cf)
|
|
|
1061 {
|
|
|
1062 ngx_http_gzip_conf_t *conf;
|
|
|
1063
|
|
|
1064 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_gzip_conf_t));
|
|
|
1065 if (conf == NULL) {
|
|
|
1066 return NGX_CONF_ERROR;
|
|
|
1067 }
|
|
|
1068
|
|
|
1069 /*
|
|
|
1070 * set by ngx_pcalloc():
|
|
|
1071 *
|
|
|
1072 * conf->bufs.num = 0;
|
|
394
|
1073 * conf->types = { NULL };
|
|
|
1074 * conf->types_keys = NULL;
|
|
50
|
1075 */
|
|
|
1076
|
|
|
1077 conf->enable = NGX_CONF_UNSET;
|
|
|
1078 conf->no_buffer = NGX_CONF_UNSET;
|
|
|
1079
|
|
|
1080 conf->level = NGX_CONF_UNSET;
|
|
|
1081 conf->wbits = (size_t) NGX_CONF_UNSET;
|
|
|
1082 conf->memlevel = (size_t) NGX_CONF_UNSET;
|
|
|
1083 conf->min_length = NGX_CONF_UNSET;
|
|
|
1084
|
|
|
1085 return conf;
|
|
|
1086 }
|
|
|
1087
|
|
|
1088
|
|
|
1089 static char *
|
|
|
1090 ngx_http_gzip_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
1091 {
|
|
|
1092 ngx_http_gzip_conf_t *prev = parent;
|
|
|
1093 ngx_http_gzip_conf_t *conf = child;
|
|
|
1094
|
|
|
1095 ngx_conf_merge_value(conf->enable, prev->enable, 0);
|
|
|
1096
|
|
432
|
1097 ngx_conf_merge_bufs_value(conf->bufs, prev->bufs,
|
|
|
1098 (128 * 1024) / ngx_pagesize, ngx_pagesize);
|
|
50
|
1099
|
|
|
1100 ngx_conf_merge_value(conf->level, prev->level, 1);
|
|
|
1101 ngx_conf_merge_size_value(conf->wbits, prev->wbits, MAX_WBITS);
|
|
|
1102 ngx_conf_merge_size_value(conf->memlevel, prev->memlevel,
|
|
|
1103 MAX_MEM_LEVEL - 1);
|
|
126
|
1104 ngx_conf_merge_value(conf->min_length, prev->min_length, 20);
|
|
50
|
1105 ngx_conf_merge_value(conf->no_buffer, prev->no_buffer, 0);
|
|
|
1106
|
|
394
|
1107 if (ngx_http_merge_types(cf, conf->types_keys, &conf->types,
|
|
|
1108 prev->types_keys, &prev->types,
|
|
|
1109 ngx_http_html_default_types)
|
|
|
1110 != NGX_OK)
|
|
|
1111 {
|
|
|
1112 return NGX_CONF_ERROR;
|
|
50
|
1113 }
|
|
|
1114
|
|
|
1115 return NGX_CONF_OK;
|
|
|
1116 }
|
|
|
1117
|
|
|
1118
|
|
230
|
1119 static ngx_int_t
|
|
|
1120 ngx_http_gzip_filter_init(ngx_conf_t *cf)
|
|
|
1121 {
|
|
|
1122 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
1123 ngx_http_top_header_filter = ngx_http_gzip_header_filter;
|
|
|
1124
|
|
|
1125 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
1126 ngx_http_top_body_filter = ngx_http_gzip_body_filter;
|
|
|
1127
|
|
|
1128 return NGX_OK;
|
|
|
1129 }
|
|
|
1130
|
|
|
1131
|
|
50
|
1132 static char *
|
|
76
|
1133 ngx_http_gzip_window(ngx_conf_t *cf, void *post, void *data)
|
|
50
|
1134 {
|
|
416
|
1135 size_t *np = data;
|
|
50
|
1136
|
|
416
|
1137 size_t wbits, wsize;
|
|
50
|
1138
|
|
|
1139 wbits = 15;
|
|
|
1140
|
|
|
1141 for (wsize = 32 * 1024; wsize > 256; wsize >>= 1) {
|
|
|
1142
|
|
|
1143 if (wsize == *np) {
|
|
|
1144 *np = wbits;
|
|
|
1145
|
|
|
1146 return NGX_CONF_OK;
|
|
|
1147 }
|
|
|
1148
|
|
|
1149 wbits--;
|
|
|
1150 }
|
|
|
1151
|
|
|
1152 return "must be 512, 1k, 2k, 4k, 8k, 16k, or 32k";
|
|
|
1153 }
|
|
|
1154
|
|
|
1155
|
|
|
1156 static char *
|
|
76
|
1157 ngx_http_gzip_hash(ngx_conf_t *cf, void *post, void *data)
|
|
50
|
1158 {
|
|
416
|
1159 size_t *np = data;
|
|
50
|
1160
|
|
416
|
1161 size_t memlevel, hsize;
|
|
50
|
1162
|
|
|
1163 memlevel = 9;
|
|
|
1164
|
|
|
1165 for (hsize = 128 * 1024; hsize > 256; hsize >>= 1) {
|
|
|
1166
|
|
|
1167 if (hsize == *np) {
|
|
|
1168 *np = memlevel;
|
|
|
1169
|
|
|
1170 return NGX_CONF_OK;
|
|
|
1171 }
|
|
|
1172
|
|
|
1173 memlevel--;
|
|
|
1174 }
|
|
|
1175
|
|
|
1176 return "must be 512, 1k, 2k, 4k, 8k, 16k, 32k, 64k, or 128k";
|
|
|
1177 }
|
