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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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454
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22 size_t postpone_gzipping;
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138
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23 ngx_int_t level;
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24 size_t wbits;
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25 size_t memlevel;
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26 ssize_t min_length;
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394
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27
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28 ngx_array_t *types_keys;
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50
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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 typedef struct {
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33 ngx_chain_t *in;
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34 ngx_chain_t *free;
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35 ngx_chain_t *busy;
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36 ngx_chain_t *out;
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37 ngx_chain_t **last_out;
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432
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38
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39 ngx_chain_t *copied;
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40 ngx_chain_t *copy_buf;
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41
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50
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42 ngx_buf_t *in_buf;
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43 ngx_buf_t *out_buf;
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44 ngx_int_t bufs;
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45
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46 void *preallocated;
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47 char *free_mem;
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48 ngx_uint_t allocated;
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49
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432
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50 int wbits;
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51 int memlevel;
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52
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50
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53 unsigned flush:4;
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54 unsigned redo:1;
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55 unsigned done:1;
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416
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56 unsigned nomem:1;
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57 unsigned gzheader:1;
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432
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58 unsigned buffering:1;
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59
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60 size_t zin;
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61 size_t zout;
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62
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63 uint32_t crc32;
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64 z_stream zstream;
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65 ngx_http_request_t *request;
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66 } ngx_http_gzip_ctx_t;
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67
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68
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416
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69 #if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
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70
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71 struct gztrailer {
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72 uint32_t crc32;
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73 uint32_t zlen;
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74 };
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75
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76 #else /* NGX_HAVE_BIG_ENDIAN || !NGX_HAVE_NONALIGNED */
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77
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78 struct gztrailer {
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79 u_char crc32[4];
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80 u_char zlen[4];
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81 };
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82
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83 #endif
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84
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85
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432
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86 static void ngx_http_gzip_filter_memory(ngx_http_request_t *r,
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87 ngx_http_gzip_ctx_t *ctx);
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454
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88 static ngx_int_t ngx_http_gzip_filter_buffer(ngx_http_gzip_ctx_t *ctx,
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432
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89 ngx_chain_t *in);
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416
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90 static ngx_int_t ngx_http_gzip_filter_deflate_start(ngx_http_request_t *r,
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91 ngx_http_gzip_ctx_t *ctx);
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92 static ngx_int_t ngx_http_gzip_filter_gzheader(ngx_http_request_t *r,
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93 ngx_http_gzip_ctx_t *ctx);
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94 static ngx_int_t ngx_http_gzip_filter_add_data(ngx_http_request_t *r,
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95 ngx_http_gzip_ctx_t *ctx);
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96 static ngx_int_t ngx_http_gzip_filter_get_buf(ngx_http_request_t *r,
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97 ngx_http_gzip_ctx_t *ctx);
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98 static ngx_int_t ngx_http_gzip_filter_deflate(ngx_http_request_t *r,
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99 ngx_http_gzip_ctx_t *ctx);
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100 static ngx_int_t ngx_http_gzip_filter_deflate_end(ngx_http_request_t *r,
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101 ngx_http_gzip_ctx_t *ctx);
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102
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50
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103 static void *ngx_http_gzip_filter_alloc(void *opaque, u_int items,
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104 u_int size);
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105 static void ngx_http_gzip_filter_free(void *opaque, void *address);
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432
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106 static void ngx_http_gzip_filter_free_copy_buf(ngx_http_request_t *r,
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107 ngx_http_gzip_ctx_t *ctx);
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50
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108
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122
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109 static ngx_int_t ngx_http_gzip_add_variables(ngx_conf_t *cf);
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110 static ngx_int_t ngx_http_gzip_ratio_variable(ngx_http_request_t *r,
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111 ngx_http_variable_value_t *v, uintptr_t data);
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112
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230
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113 static ngx_int_t ngx_http_gzip_filter_init(ngx_conf_t *cf);
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50
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114 static void *ngx_http_gzip_create_conf(ngx_conf_t *cf);
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115 static char *ngx_http_gzip_merge_conf(ngx_conf_t *cf,
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116 void *parent, void *child);
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76
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117 static char *ngx_http_gzip_window(ngx_conf_t *cf, void *post, void *data);
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118 static char *ngx_http_gzip_hash(ngx_conf_t *cf, void *post, void *data);
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119
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120
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121 static ngx_conf_num_bounds_t ngx_http_gzip_comp_level_bounds = {
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122 ngx_conf_check_num_bounds, 1, 9
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123 };
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124
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76
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125 static ngx_conf_post_handler_pt ngx_http_gzip_window_p = ngx_http_gzip_window;
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126 static ngx_conf_post_handler_pt ngx_http_gzip_hash_p = ngx_http_gzip_hash;
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50
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127
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128
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129 static ngx_command_t ngx_http_gzip_filter_commands[] = {
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130
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131 { ngx_string("gzip"),
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132 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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133 |NGX_CONF_FLAG,
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134 ngx_conf_set_flag_slot,
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135 NGX_HTTP_LOC_CONF_OFFSET,
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136 offsetof(ngx_http_gzip_conf_t, enable),
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137 NULL },
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138
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139 { ngx_string("gzip_buffers"),
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140 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
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141 ngx_conf_set_bufs_slot,
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142 NGX_HTTP_LOC_CONF_OFFSET,
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143 offsetof(ngx_http_gzip_conf_t, bufs),
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144 NULL },
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145
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146 { ngx_string("gzip_types"),
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147 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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394
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148 ngx_http_types_slot,
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50
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149 NGX_HTTP_LOC_CONF_OFFSET,
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394
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150 offsetof(ngx_http_gzip_conf_t, types_keys),
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151 &ngx_http_html_default_types[0] },
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50
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152
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153 { ngx_string("gzip_comp_level"),
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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_num_slot,
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156 NGX_HTTP_LOC_CONF_OFFSET,
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157 offsetof(ngx_http_gzip_conf_t, level),
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158 &ngx_http_gzip_comp_level_bounds },
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159
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160 { ngx_string("gzip_window"),
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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, wbits),
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165 &ngx_http_gzip_window_p },
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166
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167 { ngx_string("gzip_hash"),
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168 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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169 ngx_conf_set_size_slot,
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170 NGX_HTTP_LOC_CONF_OFFSET,
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171 offsetof(ngx_http_gzip_conf_t, memlevel),
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76
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172 &ngx_http_gzip_hash_p },
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173
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454
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174 { ngx_string("postpone_gzipping"),
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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_size_slot,
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177 NGX_HTTP_LOC_CONF_OFFSET,
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178 offsetof(ngx_http_gzip_conf_t, postpone_gzipping),
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179 NULL },
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180
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50
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181 { ngx_string("gzip_no_buffer"),
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182 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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183 ngx_conf_set_flag_slot,
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184 NGX_HTTP_LOC_CONF_OFFSET,
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185 offsetof(ngx_http_gzip_conf_t, no_buffer),
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186 NULL },
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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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58
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215 NGX_MODULE_V1,
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50
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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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50
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227 };
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228
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229
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122
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230 static ngx_str_t ngx_http_gzip_ratio = ngx_string("gzip_ratio");
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58
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231
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50
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232 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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233 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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234
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235
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236 static ngx_int_t
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237 ngx_http_gzip_header_filter(ngx_http_request_t *r)
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238 {
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382
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239 ngx_table_elt_t *h;
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240 ngx_http_gzip_ctx_t *ctx;
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241 ngx_http_gzip_conf_t *conf;
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50
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242
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243 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
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244
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245 if (!conf->enable
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246 || (r->headers_out.status != NGX_HTTP_OK
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247 && r->headers_out.status != NGX_HTTP_FORBIDDEN
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248 && r->headers_out.status != NGX_HTTP_NOT_FOUND)
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249 || r->header_only
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250 || (r->headers_out.content_encoding
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251 && r->headers_out.content_encoding->value.len)
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252 || (r->headers_out.content_length_n != -1
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253 && r->headers_out.content_length_n < conf->min_length)
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394
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254 || ngx_http_test_content_type(r, &conf->types) == NULL
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358
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255 || ngx_http_gzip_ok(r) != NGX_OK)
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50
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256 {
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257 return ngx_http_next_header_filter(r);
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258 }
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259
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260 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_gzip_ctx_t));
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261 if (ctx == NULL) {
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262 return NGX_ERROR;
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263 }
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264
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265 ngx_http_set_ctx(r, ctx, ngx_http_gzip_filter_module);
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266
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267 ctx->request = r;
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454
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268 ctx->buffering = (conf->postpone_gzipping != 0);
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432
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269
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270 ngx_http_gzip_filter_memory(r, ctx);
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50
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271
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358
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272 h = ngx_list_push(&r->headers_out.headers);
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273 if (h == NULL) {
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50
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274 return NGX_ERROR;
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275 }
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276
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358
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277 h->hash = 1;
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278 h->key.len = sizeof("Content-Encoding") - 1;
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279 h->key.data = (u_char *) "Content-Encoding";
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280 h->value.len = sizeof("gzip") - 1;
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281 h->value.data = (u_char *) "gzip";
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342
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282
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358
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283 r->headers_out.content_encoding = h;
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284
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62
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285 r->main_filter_need_in_memory = 1;
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50
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286
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126
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287 ngx_http_clear_content_length(r);
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288 ngx_http_clear_accept_ranges(r);
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289
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50
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290 return ngx_http_next_header_filter(r);
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291 }
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292
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293
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294 static ngx_int_t
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295 ngx_http_gzip_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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296 {
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416
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297 int rc;
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298 ngx_chain_t *cl;
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299 ngx_http_gzip_ctx_t *ctx;
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50
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300
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301 ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module);
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302
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303 if (ctx == NULL || ctx->done) {
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304 return ngx_http_next_body_filter(r, in);
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305 }
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306
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432
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307 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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308 "http gzip filter");
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309
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310 if (ctx->buffering) {
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311
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454
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312 /*
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313 * With default memory settings zlib starts to output gzipped data
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314 * only after it has got about 90K, so it makes sense to allocate
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315 * zlib memory (200-400K) only after we have enough data to compress.
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316 * Although we copy buffers, nevertheless for not big responses
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317 * this allows to allocate zlib memory, to compress and to output
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318 * the response in one step using hot CPU cache.
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319 */
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320
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432
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321 if (in) {
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454
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322 switch (ngx_http_gzip_filter_buffer(ctx, in)) {
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432
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323
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440
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324 case NGX_OK:
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325 return NGX_OK;
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432
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326
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440
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327 case NGX_DONE:
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328 in = NULL;
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329 break;
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432
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330
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440
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331 default: /* NGX_ERROR */
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332 goto failed;
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333 }
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432
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334
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335 } else {
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336 ctx->buffering = 0;
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337 }
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338 }
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339
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50
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340 if (ctx->preallocated == NULL) {
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416
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341 if (ngx_http_gzip_filter_deflate_start(r, ctx) != NGX_OK) {
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342 goto failed;
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50
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343 }
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344 }
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345
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346 if (in) {
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454
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347 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) {
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416
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348 goto failed;
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50
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349 }
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350 }
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351
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416
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352 if (ctx->nomem) {
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353
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354 /* flush busy buffers */
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355
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356 if (ngx_http_next_body_filter(r, NULL) == NGX_ERROR) {
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357 goto failed;
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358 }
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359
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360 cl = NULL;
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361
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362 ngx_chain_update_chains(&ctx->free, &ctx->busy, &cl,
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363 (ngx_buf_tag_t) &ngx_http_gzip_filter_module);
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364 ctx->nomem = 0;
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365 }
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50
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366
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|
|
367 for ( ;; ) {
|
|
|
368
|
|
416
|
369 /* cycle while we can write to a client */
|
|
|
370
|
|
50
|
371 for ( ;; ) {
|
|
|
372
|
|
416
|
373 /* cycle while there is data to feed zlib and ... */
|
|
50
|
374
|
|
416
|
375 rc = ngx_http_gzip_filter_add_data(r, ctx);
|
|
50
|
376
|
|
416
|
377 if (rc == NGX_DECLINED) {
|
|
|
378 break;
|
|
|
379 }
|
|
50
|
380
|
|
416
|
381 if (rc == NGX_AGAIN) {
|
|
|
382 continue;
|
|
50
|
383 }
|
|
|
384
|
|
|
385
|
|
416
|
386 /* ... there are buffers to write zlib output */
|
|
50
|
387
|
|
416
|
388 rc = ngx_http_gzip_filter_get_buf(r, ctx);
|
|
50
|
389
|
|
416
|
390 if (rc == NGX_DECLINED) {
|
|
|
391 break;
|
|
50
|
392 }
|
|
|
393
|
|
416
|
394 if (rc == NGX_ERROR) {
|
|
|
395 goto failed;
|
|
50
|
396 }
|
|
|
397
|
|
|
398
|
|
416
|
399 rc = ngx_http_gzip_filter_deflate(r, ctx);
|
|
50
|
400
|
|
416
|
401 if (rc == NGX_OK) {
|
|
50
|
402 break;
|
|
|
403 }
|
|
|
404
|
|
416
|
405 if (rc == NGX_ERROR) {
|
|
|
406 goto failed;
|
|
50
|
407 }
|
|
|
408
|
|
416
|
409 /* rc == NGX_AGAIN */
|
|
|
410 }
|
|
50
|
411
|
|
416
|
412 if (ctx->out == NULL) {
|
|
432
|
413 ngx_http_gzip_filter_free_copy_buf(r, ctx);
|
|
|
414
|
|
416
|
415 return ctx->busy ? NGX_AGAIN : NGX_OK;
|
|
|
416 }
|
|
50
|
417
|
|
416
|
418 if (!ctx->gzheader) {
|
|
|
419 if (ngx_http_gzip_filter_gzheader(r, ctx) != NGX_OK) {
|
|
|
420 goto failed;
|
|
50
|
421 }
|
|
|
422 }
|
|
|
423
|
|
416
|
424 rc = ngx_http_next_body_filter(r, ctx->out);
|
|
50
|
425
|
|
416
|
426 if (rc == NGX_ERROR) {
|
|
|
427 goto failed;
|
|
50
|
428 }
|
|
|
429
|
|
432
|
430 ngx_http_gzip_filter_free_copy_buf(r, ctx);
|
|
|
431
|
|
50
|
432 ngx_chain_update_chains(&ctx->free, &ctx->busy, &ctx->out,
|
|
|
433 (ngx_buf_tag_t) &ngx_http_gzip_filter_module);
|
|
|
434 ctx->last_out = &ctx->out;
|
|
|
435
|
|
416
|
436 ctx->nomem = 0;
|
|
|
437
|
|
50
|
438 if (ctx->done) {
|
|
416
|
439 return rc;
|
|
|
440 }
|
|
|
441 }
|
|
|
442
|
|
|
443 /* unreachable */
|
|
|
444
|
|
|
445 failed:
|
|
|
446
|
|
|
447 ctx->done = 1;
|
|
|
448
|
|
|
449 if (ctx->preallocated) {
|
|
|
450 deflateEnd(&ctx->zstream);
|
|
|
451
|
|
|
452 ngx_pfree(r->pool, ctx->preallocated);
|
|
|
453 }
|
|
|
454
|
|
432
|
455 ngx_http_gzip_filter_free_copy_buf(r, ctx);
|
|
|
456
|
|
416
|
457 return NGX_ERROR;
|
|
|
458 }
|
|
|
459
|
|
|
460
|
|
432
|
461 static void
|
|
|
462 ngx_http_gzip_filter_memory(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
|
416
|
463 {
|
|
432
|
464 int wbits, memlevel;
|
|
416
|
465 ngx_http_gzip_conf_t *conf;
|
|
|
466
|
|
|
467 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
|
468
|
|
|
469 wbits = conf->wbits;
|
|
|
470 memlevel = conf->memlevel;
|
|
|
471
|
|
432
|
472 if (r->headers_out.content_length_n > 0) {
|
|
416
|
473
|
|
|
474 /* the actual zlib window size is smaller by 262 bytes */
|
|
|
475
|
|
432
|
476 while (r->headers_out.content_length_n < ((1 << (wbits - 1)) - 262)) {
|
|
416
|
477 wbits--;
|
|
|
478 memlevel--;
|
|
50
|
479 }
|
|
|
480 }
|
|
416
|
481
|
|
432
|
482 ctx->wbits = wbits;
|
|
|
483 ctx->memlevel = memlevel;
|
|
|
484
|
|
416
|
485 /*
|
|
|
486 * We preallocate a memory for zlib in one buffer (200K-400K), this
|
|
|
487 * decreases a number of malloc() and free() calls and also probably
|
|
|
488 * decreases a number of syscalls (sbrk()/mmap() and so on).
|
|
|
489 * Besides we free the memory as soon as a gzipping will complete
|
|
|
490 * and do not wait while a whole response will be sent to a client.
|
|
|
491 *
|
|
|
492 * 8K is for zlib deflate_state, it takes
|
|
|
493 * *) 5816 bytes on i386 and sparc64 (32-bit mode)
|
|
|
494 * *) 5920 bytes on amd64 and sparc64
|
|
|
495 */
|
|
|
496
|
|
|
497 ctx->allocated = 8192 + (1 << (wbits + 2)) + (1 << (memlevel + 9));
|
|
432
|
498 }
|
|
|
499
|
|
|
500
|
|
|
501 static ngx_int_t
|
|
454
|
502 ngx_http_gzip_filter_buffer(ngx_http_gzip_ctx_t *ctx, ngx_chain_t *in)
|
|
432
|
503 {
|
|
454
|
504 size_t size, buffered;
|
|
|
505 ngx_buf_t *b, *buf;
|
|
|
506 ngx_chain_t *cl, **ll;
|
|
|
507 ngx_http_request_t *r;
|
|
|
508 ngx_http_gzip_conf_t *conf;
|
|
432
|
509
|
|
|
510 r = ctx->request;
|
|
|
511
|
|
|
512 r->connection->buffered |= NGX_HTTP_GZIP_BUFFERED;
|
|
|
513
|
|
|
514 buffered = 0;
|
|
|
515 ll = &ctx->in;
|
|
|
516
|
|
|
517 for (cl = ctx->in; cl; cl = cl->next) {
|
|
|
518 buffered += cl->buf->last - cl->buf->pos;
|
|
|
519 ll = &cl->next;
|
|
|
520 }
|
|
|
521
|
|
454
|
522 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
|
523
|
|
432
|
524 while (in) {
|
|
|
525 cl = ngx_alloc_chain_link(r->pool);
|
|
|
526 if (cl == NULL) {
|
|
|
527 return NGX_ERROR;
|
|
|
528 }
|
|
|
529
|
|
|
530 b = in->buf;
|
|
|
531
|
|
|
532 size = b->last - b->pos;
|
|
|
533 buffered += size;
|
|
|
534
|
|
454
|
535 if (b->flush || b->last_buf || buffered > conf->postpone_gzipping) {
|
|
432
|
536 ctx->buffering = 0;
|
|
|
537 }
|
|
|
538
|
|
454
|
539 if (ctx->buffering && size) {
|
|
432
|
540
|
|
|
541 buf = ngx_create_temp_buf(r->pool, size);
|
|
|
542 if (buf == NULL) {
|
|
|
543 return NGX_ERROR;
|
|
|
544 }
|
|
|
545
|
|
|
546 buf->last = ngx_cpymem(buf->pos, b->pos, size);
|
|
|
547 b->pos = b->last;
|
|
|
548
|
|
|
549 buf->last_buf = b->last_buf;
|
|
|
550 buf->tag = (ngx_buf_tag_t) &ngx_http_gzip_filter_module;
|
|
|
551
|
|
|
552 cl->buf = buf;
|
|
|
553
|
|
|
554 } else {
|
|
|
555 cl->buf = b;
|
|
|
556 }
|
|
|
557
|
|
|
558 *ll = cl;
|
|
|
559 ll = &cl->next;
|
|
|
560 in = in->next;
|
|
|
561 }
|
|
|
562
|
|
|
563 *ll = NULL;
|
|
|
564
|
|
|
565 return ctx->buffering ? NGX_OK : NGX_DONE;
|
|
|
566 }
|
|
|
567
|
|
|
568
|
|
|
569 static ngx_int_t
|
|
|
570 ngx_http_gzip_filter_deflate_start(ngx_http_request_t *r,
|
|
|
571 ngx_http_gzip_ctx_t *ctx)
|
|
|
572 {
|
|
|
573 int rc;
|
|
|
574 ngx_http_gzip_conf_t *conf;
|
|
|
575
|
|
|
576 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
416
|
577
|
|
|
578 ctx->preallocated = ngx_palloc(r->pool, ctx->allocated);
|
|
|
579 if (ctx->preallocated == NULL) {
|
|
|
580 return NGX_ERROR;
|
|
|
581 }
|
|
|
582
|
|
|
583 ctx->free_mem = ctx->preallocated;
|
|
|
584
|
|
|
585 ctx->zstream.zalloc = ngx_http_gzip_filter_alloc;
|
|
|
586 ctx->zstream.zfree = ngx_http_gzip_filter_free;
|
|
|
587 ctx->zstream.opaque = ctx;
|
|
|
588
|
|
|
589 rc = deflateInit2(&ctx->zstream, (int) conf->level, Z_DEFLATED,
|
|
432
|
590 - ctx->wbits, ctx->memlevel, Z_DEFAULT_STRATEGY);
|
|
416
|
591
|
|
|
592 if (rc != Z_OK) {
|
|
|
593 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
594 "deflateInit2() failed: %d", rc);
|
|
|
595 return NGX_ERROR;
|
|
|
596 }
|
|
|
597
|
|
|
598 ctx->last_out = &ctx->out;
|
|
|
599 ctx->crc32 = crc32(0L, Z_NULL, 0);
|
|
|
600 ctx->flush = Z_NO_FLUSH;
|
|
|
601
|
|
|
602 return NGX_OK;
|
|
|
603 }
|
|
|
604
|
|
|
605
|
|
|
606 static ngx_int_t
|
|
|
607 ngx_http_gzip_filter_gzheader(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
|
|
608 {
|
|
|
609 ngx_buf_t *b;
|
|
|
610 ngx_chain_t *cl;
|
|
|
611 static u_char gzheader[10] =
|
|
|
612 { 0x1f, 0x8b, Z_DEFLATED, 0, 0, 0, 0, 0, 0, 3 };
|
|
|
613
|
|
|
614 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
615 if (b == NULL) {
|
|
|
616 return NGX_ERROR;
|
|
|
617 }
|
|
|
618
|
|
|
619 b->memory = 1;
|
|
|
620 b->pos = gzheader;
|
|
|
621 b->last = b->pos + 10;
|
|
|
622
|
|
|
623 cl = ngx_alloc_chain_link(r->pool);
|
|
|
624 if (cl == NULL) {
|
|
|
625 return NGX_ERROR;
|
|
|
626 }
|
|
|
627
|
|
|
628 cl->buf = b;
|
|
|
629 cl->next = ctx->out;
|
|
|
630 ctx->out = cl;
|
|
|
631
|
|
|
632 ctx->gzheader = 1;
|
|
|
633
|
|
|
634 return NGX_OK;
|
|
|
635 }
|
|
|
636
|
|
|
637
|
|
|
638 static ngx_int_t
|
|
|
639 ngx_http_gzip_filter_add_data(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
|
|
640 {
|
|
|
641 if (ctx->zstream.avail_in || ctx->flush != Z_NO_FLUSH || ctx->redo) {
|
|
|
642 return NGX_OK;
|
|
|
643 }
|
|
|
644
|
|
|
645 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
646 "gzip in: %p", ctx->in);
|
|
|
647
|
|
|
648 if (ctx->in == NULL) {
|
|
|
649 return NGX_DECLINED;
|
|
|
650 }
|
|
|
651
|
|
432
|
652 if (ctx->copy_buf) {
|
|
|
653
|
|
|
654 /*
|
|
|
655 * to avoid CPU cache trashing we do not free() just quit buf,
|
|
|
656 * but postpone free()ing after zlib compressing and data output
|
|
|
657 */
|
|
|
658
|
|
|
659 ctx->copy_buf->next = ctx->copied;
|
|
|
660 ctx->copied = ctx->copy_buf;
|
|
|
661 ctx->copy_buf = NULL;
|
|
|
662 }
|
|
|
663
|
|
416
|
664 ctx->in_buf = ctx->in->buf;
|
|
432
|
665
|
|
|
666 if (ctx->in_buf->tag == (ngx_buf_tag_t) &ngx_http_gzip_filter_module) {
|
|
|
667 ctx->copy_buf = ctx->in;
|
|
|
668 }
|
|
|
669
|
|
416
|
670 ctx->in = ctx->in->next;
|
|
|
671
|
|
|
672 ctx->zstream.next_in = ctx->in_buf->pos;
|
|
|
673 ctx->zstream.avail_in = ctx->in_buf->last - ctx->in_buf->pos;
|
|
|
674
|
|
|
675 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
676 "gzip in_buf:%p ni:%p ai:%ud",
|
|
|
677 ctx->in_buf,
|
|
|
678 ctx->zstream.next_in, ctx->zstream.avail_in);
|
|
|
679
|
|
|
680 if (ctx->in_buf->last_buf) {
|
|
|
681 ctx->flush = Z_FINISH;
|
|
|
682
|
|
|
683 } else if (ctx->in_buf->flush) {
|
|
|
684 ctx->flush = Z_SYNC_FLUSH;
|
|
|
685 }
|
|
|
686
|
|
|
687 if (ctx->zstream.avail_in) {
|
|
|
688
|
|
|
689 ctx->crc32 = crc32(ctx->crc32, ctx->zstream.next_in,
|
|
|
690 ctx->zstream.avail_in);
|
|
|
691
|
|
|
692 } else if (ctx->flush == Z_NO_FLUSH) {
|
|
|
693 return NGX_AGAIN;
|
|
|
694 }
|
|
|
695
|
|
|
696 return NGX_OK;
|
|
|
697 }
|
|
|
698
|
|
|
699
|
|
|
700 static ngx_int_t
|
|
|
701 ngx_http_gzip_filter_get_buf(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
|
|
702 {
|
|
|
703 ngx_http_gzip_conf_t *conf;
|
|
|
704
|
|
|
705 if (ctx->zstream.avail_out) {
|
|
|
706 return NGX_OK;
|
|
|
707 }
|
|
|
708
|
|
|
709 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
|
710
|
|
|
711 if (ctx->free) {
|
|
|
712 ctx->out_buf = ctx->free->buf;
|
|
|
713 ctx->free = ctx->free->next;
|
|
|
714
|
|
|
715 } else if (ctx->bufs < conf->bufs.num) {
|
|
|
716
|
|
|
717 ctx->out_buf = ngx_create_temp_buf(r->pool, conf->bufs.size);
|
|
|
718 if (ctx->out_buf == NULL) {
|
|
|
719 return NGX_ERROR;
|
|
|
720 }
|
|
|
721
|
|
|
722 ctx->out_buf->tag = (ngx_buf_tag_t) &ngx_http_gzip_filter_module;
|
|
|
723 ctx->out_buf->recycled = 1;
|
|
|
724 ctx->bufs++;
|
|
|
725
|
|
|
726 } else {
|
|
|
727 ctx->nomem = 1;
|
|
|
728 return NGX_DECLINED;
|
|
|
729 }
|
|
|
730
|
|
|
731 ctx->zstream.next_out = ctx->out_buf->pos;
|
|
|
732 ctx->zstream.avail_out = conf->bufs.size;
|
|
|
733
|
|
|
734 return NGX_OK;
|
|
|
735 }
|
|
|
736
|
|
|
737
|
|
|
738 static ngx_int_t
|
|
|
739 ngx_http_gzip_filter_deflate(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx)
|
|
|
740 {
|
|
|
741 int rc;
|
|
|
742 ngx_chain_t *cl;
|
|
|
743 ngx_http_gzip_conf_t *conf;
|
|
|
744
|
|
|
745 ngx_log_debug6(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
746 "deflate in: ni:%p no:%p ai:%ud ao:%ud fl:%d redo:%d",
|
|
|
747 ctx->zstream.next_in, ctx->zstream.next_out,
|
|
|
748 ctx->zstream.avail_in, ctx->zstream.avail_out,
|
|
|
749 ctx->flush, ctx->redo);
|
|
|
750
|
|
|
751 rc = deflate(&ctx->zstream, ctx->flush);
|
|
|
752
|
|
|
753 if (rc != Z_OK && rc != Z_STREAM_END) {
|
|
|
754 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
755 "deflate() failed: %d, %d", ctx->flush, rc);
|
|
|
756 return NGX_ERROR;
|
|
|
757 }
|
|
|
758
|
|
|
759 ngx_log_debug5(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
760 "deflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d",
|
|
|
761 ctx->zstream.next_in, ctx->zstream.next_out,
|
|
|
762 ctx->zstream.avail_in, ctx->zstream.avail_out,
|
|
|
763 rc);
|
|
|
764
|
|
|
765 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
766 "gzip in_buf:%p pos:%p",
|
|
|
767 ctx->in_buf, ctx->in_buf->pos);
|
|
|
768
|
|
|
769 if (ctx->zstream.next_in) {
|
|
|
770 ctx->in_buf->pos = ctx->zstream.next_in;
|
|
|
771
|
|
|
772 if (ctx->zstream.avail_in == 0) {
|
|
|
773 ctx->zstream.next_in = NULL;
|
|
|
774 }
|
|
|
775 }
|
|
|
776
|
|
|
777 ctx->out_buf->last = ctx->zstream.next_out;
|
|
|
778
|
|
|
779 if (ctx->zstream.avail_out == 0) {
|
|
|
780
|
|
|
781 /* zlib wants to output some more gzipped data */
|
|
|
782
|
|
|
783 cl = ngx_alloc_chain_link(r->pool);
|
|
|
784 if (cl == NULL) {
|
|
|
785 return NGX_ERROR;
|
|
|
786 }
|
|
|
787
|
|
|
788 cl->buf = ctx->out_buf;
|
|
|
789 cl->next = NULL;
|
|
|
790 *ctx->last_out = cl;
|
|
|
791 ctx->last_out = &cl->next;
|
|
|
792
|
|
|
793 ctx->redo = 1;
|
|
|
794
|
|
|
795 return NGX_AGAIN;
|
|
|
796 }
|
|
|
797
|
|
|
798 ctx->redo = 0;
|
|
|
799
|
|
|
800 if (ctx->flush == Z_SYNC_FLUSH) {
|
|
|
801
|
|
|
802 ctx->zstream.avail_out = 0;
|
|
|
803 ctx->out_buf->flush = 1;
|
|
|
804 ctx->flush = Z_NO_FLUSH;
|
|
|
805
|
|
|
806 cl = ngx_alloc_chain_link(r->pool);
|
|
|
807 if (cl == NULL) {
|
|
|
808 return NGX_ERROR;
|
|
|
809 }
|
|
|
810
|
|
|
811 cl->buf = ctx->out_buf;
|
|
|
812 cl->next = NULL;
|
|
|
813 *ctx->last_out = cl;
|
|
|
814 ctx->last_out = &cl->next;
|
|
|
815
|
|
|
816 return NGX_OK;
|
|
|
817 }
|
|
|
818
|
|
|
819 if (rc == Z_STREAM_END) {
|
|
|
820
|
|
|
821 if (ngx_http_gzip_filter_deflate_end(r, ctx) != NGX_OK) {
|
|
|
822 return NGX_ERROR;
|
|
|
823 }
|
|
|
824
|
|
|
825 return NGX_OK;
|
|
|
826 }
|
|
|
827
|
|
|
828 conf = ngx_http_get_module_loc_conf(r, ngx_http_gzip_filter_module);
|
|
|
829
|
|
|
830 if (conf->no_buffer && ctx->in == NULL) {
|
|
|
831
|
|
|
832 cl = ngx_alloc_chain_link(r->pool);
|
|
|
833 if (cl == NULL) {
|
|
|
834 return NGX_ERROR;
|
|
|
835 }
|
|
|
836
|
|
|
837 cl->buf = ctx->out_buf;
|
|
|
838 cl->next = NULL;
|
|
|
839 *ctx->last_out = cl;
|
|
|
840 ctx->last_out = &cl->next;
|
|
|
841
|
|
|
842 return NGX_OK;
|
|
|
843 }
|
|
|
844
|
|
|
845 return NGX_AGAIN;
|
|
|
846 }
|
|
|
847
|
|
|
848
|
|
|
849 static ngx_int_t
|
|
|
850 ngx_http_gzip_filter_deflate_end(ngx_http_request_t *r,
|
|
|
851 ngx_http_gzip_ctx_t *ctx)
|
|
|
852 {
|
|
|
853 int rc;
|
|
|
854 ngx_buf_t *b;
|
|
|
855 ngx_chain_t *cl;
|
|
|
856 struct gztrailer *trailer;
|
|
|
857
|
|
|
858 ctx->zin = ctx->zstream.total_in;
|
|
|
859 ctx->zout = 10 + ctx->zstream.total_out + 8;
|
|
|
860
|
|
|
861 rc = deflateEnd(&ctx->zstream);
|
|
|
862
|
|
|
863 if (rc != Z_OK) {
|
|
|
864 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
865 "deflateEnd() failed: %d", rc);
|
|
|
866 return NGX_ERROR;
|
|
|
867 }
|
|
|
868
|
|
|
869 ngx_pfree(r->pool, ctx->preallocated);
|
|
|
870
|
|
|
871 cl = ngx_alloc_chain_link(r->pool);
|
|
|
872 if (cl == NULL) {
|
|
|
873 return NGX_ERROR;
|
|
|
874 }
|
|
|
875
|
|
|
876 cl->buf = ctx->out_buf;
|
|
|
877 cl->next = NULL;
|
|
|
878 *ctx->last_out = cl;
|
|
|
879 ctx->last_out = &cl->next;
|
|
|
880
|
|
|
881 if (ctx->zstream.avail_out >= 8) {
|
|
|
882 trailer = (struct gztrailer *) ctx->out_buf->last;
|
|
|
883 ctx->out_buf->last += 8;
|
|
|
884 ctx->out_buf->last_buf = 1;
|
|
|
885
|
|
|
886 } else {
|
|
|
887 b = ngx_create_temp_buf(r->pool, 8);
|
|
|
888 if (b == NULL) {
|
|
|
889 return NGX_ERROR;
|
|
|
890 }
|
|
|
891
|
|
|
892 b->last_buf = 1;
|
|
|
893
|
|
|
894 cl = ngx_alloc_chain_link(r->pool);
|
|
|
895 if (cl == NULL) {
|
|
|
896 return NGX_ERROR;
|
|
|
897 }
|
|
|
898
|
|
|
899 cl->buf = b;
|
|
|
900 cl->next = NULL;
|
|
|
901 *ctx->last_out = cl;
|
|
|
902 ctx->last_out = &cl->next;
|
|
|
903 trailer = (struct gztrailer *) b->pos;
|
|
|
904 b->last += 8;
|
|
|
905 }
|
|
|
906
|
|
|
907 #if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
|
|
|
908
|
|
|
909 trailer->crc32 = ctx->crc32;
|
|
|
910 trailer->zlen = ctx->zin;
|
|
|
911
|
|
|
912 #else
|
|
|
913
|
|
|
914 trailer->crc32[0] = (u_char) (ctx->crc32 & 0xff);
|
|
|
915 trailer->crc32[1] = (u_char) ((ctx->crc32 >> 8) & 0xff);
|
|
|
916 trailer->crc32[2] = (u_char) ((ctx->crc32 >> 16) & 0xff);
|
|
|
917 trailer->crc32[3] = (u_char) ((ctx->crc32 >> 24) & 0xff);
|
|
|
918
|
|
|
919 trailer->zlen[0] = (u_char) (ctx->zin & 0xff);
|
|
|
920 trailer->zlen[1] = (u_char) ((ctx->zin >> 8) & 0xff);
|
|
|
921 trailer->zlen[2] = (u_char) ((ctx->zin >> 16) & 0xff);
|
|
|
922 trailer->zlen[3] = (u_char) ((ctx->zin >> 24) & 0xff);
|
|
|
923
|
|
|
924 #endif
|
|
|
925
|
|
|
926 ctx->zstream.avail_in = 0;
|
|
|
927 ctx->zstream.avail_out = 0;
|
|
|
928
|
|
|
929 ctx->done = 1;
|
|
|
930
|
|
|
931 r->connection->buffered &= ~NGX_HTTP_GZIP_BUFFERED;
|
|
|
932
|
|
|
933 return NGX_OK;
|
|
50
|
934 }
|
|
|
935
|
|
|
936
|
|
|
937 static void *
|
|
|
938 ngx_http_gzip_filter_alloc(void *opaque, u_int items, u_int size)
|
|
|
939 {
|
|
|
940 ngx_http_gzip_ctx_t *ctx = opaque;
|
|
|
941
|
|
|
942 void *p;
|
|
|
943 ngx_uint_t alloc;
|
|
|
944
|
|
|
945 alloc = items * size;
|
|
|
946
|
|
434
|
947 if (alloc % 512 != 0 && alloc < 8192) {
|
|
50
|
948
|
|
|
949 /*
|
|
|
950 * The zlib deflate_state allocation, it takes about 6K,
|
|
|
951 * we allocate 8K. Other allocations are divisible by 512.
|
|
|
952 */
|
|
|
953
|
|
434
|
954 alloc = 8192;
|
|
50
|
955 }
|
|
|
956
|
|
|
957 if (alloc <= ctx->allocated) {
|
|
|
958 p = ctx->free_mem;
|
|
|
959 ctx->free_mem += alloc;
|
|
|
960 ctx->allocated -= alloc;
|
|
|
961
|
|
|
962 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0,
|
|
|
963 "gzip alloc: n:%ud s:%ud a:%ud p:%p",
|
|
|
964 items, size, alloc, p);
|
|
|
965
|
|
|
966 return p;
|
|
|
967 }
|
|
|
968
|
|
|
969 ngx_log_error(NGX_LOG_ALERT, ctx->request->connection->log, 0,
|
|
|
970 "gzip filter failed to use preallocated memory: %ud of %ud",
|
|
|
971 items * size, ctx->allocated);
|
|
|
972
|
|
|
973 p = ngx_palloc(ctx->request->pool, items * size);
|
|
|
974
|
|
|
975 return p;
|
|
|
976 }
|
|
|
977
|
|
|
978
|
|
|
979 static void
|
|
|
980 ngx_http_gzip_filter_free(void *opaque, void *address)
|
|
|
981 {
|
|
|
982 #if 0
|
|
|
983 ngx_http_gzip_ctx_t *ctx = opaque;
|
|
|
984
|
|
|
985 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0,
|
|
|
986 "gzip free: %p", address);
|
|
|
987 #endif
|
|
|
988 }
|
|
|
989
|
|
|
990
|
|
432
|
991 static void
|
|
|
992 ngx_http_gzip_filter_free_copy_buf(ngx_http_request_t *r,
|
|
|
993 ngx_http_gzip_ctx_t *ctx)
|
|
|
994 {
|
|
|
995 ngx_chain_t *cl;
|
|
|
996
|
|
|
997 for (cl = ctx->copied; cl; cl = cl->next) {
|
|
|
998 ngx_pfree(r->pool, cl->buf->start);
|
|
|
999 }
|
|
|
1000
|
|
|
1001 ctx->copied = NULL;
|
|
|
1002 }
|
|
|
1003
|
|
|
1004
|
|
50
|
1005 static ngx_int_t
|
|
122
|
1006 ngx_http_gzip_add_variables(ngx_conf_t *cf)
|
|
50
|
1007 {
|
|
260
|
1008 ngx_http_variable_t *var;
|
|
50
|
1009
|
|
132
|
1010 var = ngx_http_add_variable(cf, &ngx_http_gzip_ratio, NGX_HTTP_VAR_NOHASH);
|
|
122
|
1011 if (var == NULL) {
|
|
|
1012 return NGX_ERROR;
|
|
|
1013 }
|
|
|
1014
|
|
186
|
1015 var->get_handler = ngx_http_gzip_ratio_variable;
|
|
122
|
1016
|
|
50
|
1017 return NGX_OK;
|
|
|
1018 }
|
|
|
1019
|
|
|
1020
|
|
|
1021 static ngx_int_t
|
|
122
|
1022 ngx_http_gzip_ratio_variable(ngx_http_request_t *r,
|
|
|
1023 ngx_http_variable_value_t *v, uintptr_t data)
|
|
|
1024 {
|
|
|
1025 ngx_uint_t zint, zfrac;
|
|
|
1026 ngx_http_gzip_ctx_t *ctx;
|
|
|
1027
|
|
126
|
1028 v->valid = 1;
|
|
340
|
1029 v->no_cacheable = 0;
|
|
122
|
1030 v->not_found = 0;
|
|
|
1031
|
|
|
1032 ctx = ngx_http_get_module_ctx(r, ngx_http_gzip_filter_module);
|
|
|
1033
|
|
|
1034 if (ctx == NULL || ctx->zout == 0) {
|
|
|
1035 v->not_found = 1;
|
|
|
1036 return NGX_OK;
|
|
|
1037 }
|
|
|
1038
|
|
382
|
1039 v->data = ngx_pnalloc(r->pool, NGX_INT32_LEN + 3);
|
|
122
|
1040 if (v->data == NULL) {
|
|
|
1041 return NGX_ERROR;
|
|
|
1042 }
|
|
|
1043
|
|
|
1044 zint = (ngx_uint_t) (ctx->zin / ctx->zout);
|
|
|
1045 zfrac = (ngx_uint_t) ((ctx->zin * 100 / ctx->zout) % 100);
|
|
|
1046
|
|
|
1047 if ((ctx->zin * 1000 / ctx->zout) % 10 > 4) {
|
|
|
1048
|
|
|
1049 /* the rounding, e.g., 2.125 to 2.13 */
|
|
|
1050
|
|
|
1051 zfrac++;
|
|
|
1052
|
|
|
1053 if (zfrac > 99) {
|
|
|
1054 zint++;
|
|
|
1055 zfrac = 0;
|
|
|
1056 }
|
|
|
1057 }
|
|
|
1058
|
|
|
1059 v->len = ngx_sprintf(v->data, "%ui.%02ui", zint, zfrac) - v->data;
|
|
|
1060
|
|
|
1061 return NGX_OK;
|
|
|
1062 }
|
|
|
1063
|
|
|
1064
|
|
50
|
1065 static void *
|
|
|
1066 ngx_http_gzip_create_conf(ngx_conf_t *cf)
|
|
|
1067 {
|
|
|
1068 ngx_http_gzip_conf_t *conf;
|
|
|
1069
|
|
|
1070 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_gzip_conf_t));
|
|
|
1071 if (conf == NULL) {
|
|
496
|
1072 return NULL;
|
|
50
|
1073 }
|
|
|
1074
|
|
|
1075 /*
|
|
|
1076 * set by ngx_pcalloc():
|
|
|
1077 *
|
|
|
1078 * conf->bufs.num = 0;
|
|
394
|
1079 * conf->types = { NULL };
|
|
|
1080 * conf->types_keys = NULL;
|
|
50
|
1081 */
|
|
|
1082
|
|
|
1083 conf->enable = NGX_CONF_UNSET;
|
|
|
1084 conf->no_buffer = NGX_CONF_UNSET;
|
|
|
1085
|
|
454
|
1086 conf->postpone_gzipping = NGX_CONF_UNSET_SIZE;
|
|
50
|
1087 conf->level = NGX_CONF_UNSET;
|
|
454
|
1088 conf->wbits = NGX_CONF_UNSET_SIZE;
|
|
|
1089 conf->memlevel = NGX_CONF_UNSET_SIZE;
|
|
50
|
1090 conf->min_length = NGX_CONF_UNSET;
|
|
|
1091
|
|
|
1092 return conf;
|
|
|
1093 }
|
|
|
1094
|
|
|
1095
|
|
|
1096 static char *
|
|
|
1097 ngx_http_gzip_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
1098 {
|
|
|
1099 ngx_http_gzip_conf_t *prev = parent;
|
|
|
1100 ngx_http_gzip_conf_t *conf = child;
|
|
|
1101
|
|
|
1102 ngx_conf_merge_value(conf->enable, prev->enable, 0);
|
|
454
|
1103 ngx_conf_merge_value(conf->no_buffer, prev->no_buffer, 0);
|
|
50
|
1104
|
|
432
|
1105 ngx_conf_merge_bufs_value(conf->bufs, prev->bufs,
|
|
|
1106 (128 * 1024) / ngx_pagesize, ngx_pagesize);
|
|
50
|
1107
|
|
454
|
1108 ngx_conf_merge_size_value(conf->postpone_gzipping, prev->postpone_gzipping,
|
|
|
1109 0);
|
|
50
|
1110 ngx_conf_merge_value(conf->level, prev->level, 1);
|
|
|
1111 ngx_conf_merge_size_value(conf->wbits, prev->wbits, MAX_WBITS);
|
|
|
1112 ngx_conf_merge_size_value(conf->memlevel, prev->memlevel,
|
|
|
1113 MAX_MEM_LEVEL - 1);
|
|
126
|
1114 ngx_conf_merge_value(conf->min_length, prev->min_length, 20);
|
|
50
|
1115
|
|
394
|
1116 if (ngx_http_merge_types(cf, conf->types_keys, &conf->types,
|
|
|
1117 prev->types_keys, &prev->types,
|
|
|
1118 ngx_http_html_default_types)
|
|
|
1119 != NGX_OK)
|
|
|
1120 {
|
|
|
1121 return NGX_CONF_ERROR;
|
|
50
|
1122 }
|
|
|
1123
|
|
|
1124 return NGX_CONF_OK;
|
|
|
1125 }
|
|
|
1126
|
|
|
1127
|
|
230
|
1128 static ngx_int_t
|
|
|
1129 ngx_http_gzip_filter_init(ngx_conf_t *cf)
|
|
|
1130 {
|
|
|
1131 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
1132 ngx_http_top_header_filter = ngx_http_gzip_header_filter;
|
|
|
1133
|
|
|
1134 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
1135 ngx_http_top_body_filter = ngx_http_gzip_body_filter;
|
|
|
1136
|
|
|
1137 return NGX_OK;
|
|
|
1138 }
|
|
|
1139
|
|
|
1140
|
|
50
|
1141 static char *
|
|
76
|
1142 ngx_http_gzip_window(ngx_conf_t *cf, void *post, void *data)
|
|
50
|
1143 {
|
|
416
|
1144 size_t *np = data;
|
|
50
|
1145
|
|
416
|
1146 size_t wbits, wsize;
|
|
50
|
1147
|
|
|
1148 wbits = 15;
|
|
|
1149
|
|
|
1150 for (wsize = 32 * 1024; wsize > 256; wsize >>= 1) {
|
|
|
1151
|
|
|
1152 if (wsize == *np) {
|
|
|
1153 *np = wbits;
|
|
|
1154
|
|
|
1155 return NGX_CONF_OK;
|
|
|
1156 }
|
|
|
1157
|
|
|
1158 wbits--;
|
|
|
1159 }
|
|
|
1160
|
|
|
1161 return "must be 512, 1k, 2k, 4k, 8k, 16k, or 32k";
|
|
|
1162 }
|
|
|
1163
|
|
|
1164
|
|
|
1165 static char *
|
|
76
|
1166 ngx_http_gzip_hash(ngx_conf_t *cf, void *post, void *data)
|
|
50
|
1167 {
|
|
416
|
1168 size_t *np = data;
|
|
50
|
1169
|
|
416
|
1170 size_t memlevel, hsize;
|
|
50
|
1171
|
|
|
1172 memlevel = 9;
|
|
|
1173
|
|
|
1174 for (hsize = 128 * 1024; hsize > 256; hsize >>= 1) {
|
|
|
1175
|
|
|
1176 if (hsize == *np) {
|
|
|
1177 *np = memlevel;
|
|
|
1178
|
|
|
1179 return NGX_CONF_OK;
|
|
|
1180 }
|
|
|
1181
|
|
|
1182 memlevel--;
|
|
|
1183 }
|
|
|
1184
|
|
|
1185 return "must be 512, 1k, 2k, 4k, 8k, 16k, 32k, 64k, or 128k";
|
|
|
1186 }
|
