Mercurial > hg > nginx
annotate src/stream/ngx_stream_split_clients_module.c @ 7660:d33e17499088
Version bump.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Tue, 26 May 2020 22:03:00 +0300 |
| parents | 787dcc15b802 |
| children |
| rev | line source |
|---|---|
| 3513 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4412 | 4 * Copyright (C) Nginx, Inc. |
| 3513 | 5 */ |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
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10 #include <ngx_stream.h> |
| 3513 | 11 |
| 12 | |
| 13 typedef struct { | |
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14 uint32_t percent; |
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15 ngx_stream_variable_value_t value; |
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16 } ngx_stream_split_clients_part_t; |
| 3513 | 17 |
| 18 | |
| 19 typedef struct { | |
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20 ngx_stream_complex_value_t value; |
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21 ngx_array_t parts; |
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22 } ngx_stream_split_clients_ctx_t; |
| 3513 | 23 |
| 24 | |
| 25 static char *ngx_conf_split_clients_block(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 26 void *conf); | |
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27 static char *ngx_stream_split_clients(ngx_conf_t *cf, ngx_command_t *dummy, |
| 3513 | 28 void *conf); |
| 29 | |
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30 static ngx_command_t ngx_stream_split_clients_commands[] = { |
| 3513 | 31 |
| 32 { ngx_string("split_clients"), | |
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33 NGX_STREAM_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE2, |
| 3513 | 34 ngx_conf_split_clients_block, |
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35 NGX_STREAM_MAIN_CONF_OFFSET, |
| 3513 | 36 0, |
| 37 NULL }, | |
| 38 | |
| 39 ngx_null_command | |
| 40 }; | |
| 41 | |
| 42 | |
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43 static ngx_stream_module_t ngx_stream_split_clients_module_ctx = { |
| 3513 | 44 NULL, /* preconfiguration */ |
| 45 NULL, /* postconfiguration */ | |
| 46 | |
| 47 NULL, /* create main configuration */ | |
| 48 NULL, /* init main configuration */ | |
| 49 | |
| 50 NULL, /* create server configuration */ | |
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51 NULL /* merge server configuration */ |
| 3513 | 52 }; |
| 53 | |
| 54 | |
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55 ngx_module_t ngx_stream_split_clients_module = { |
| 3513 | 56 NGX_MODULE_V1, |
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57 &ngx_stream_split_clients_module_ctx, /* module context */ |
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58 ngx_stream_split_clients_commands, /* module directives */ |
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59 NGX_STREAM_MODULE, /* module type */ |
| 3513 | 60 NULL, /* init master */ |
| 61 NULL, /* init module */ | |
| 62 NULL, /* init process */ | |
| 63 NULL, /* init thread */ | |
| 64 NULL, /* exit thread */ | |
| 65 NULL, /* exit process */ | |
| 66 NULL, /* exit master */ | |
| 67 NGX_MODULE_V1_PADDING | |
| 68 }; | |
| 69 | |
| 70 | |
| 71 static ngx_int_t | |
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72 ngx_stream_split_clients_variable(ngx_stream_session_t *s, |
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73 ngx_stream_variable_value_t *v, uintptr_t data) |
| 3513 | 74 { |
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75 ngx_stream_split_clients_ctx_t *ctx = |
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76 (ngx_stream_split_clients_ctx_t *) data; |
| 3513 | 77 |
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78 uint32_t hash; |
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79 ngx_str_t val; |
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80 ngx_uint_t i; |
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81 ngx_stream_split_clients_part_t *part; |
| 3513 | 82 |
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83 *v = ngx_stream_variable_null_value; |
| 3513 | 84 |
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85 if (ngx_stream_complex_value(s, &ctx->value, &val) != NGX_OK) { |
| 3513 | 86 return NGX_OK; |
| 87 } | |
| 88 | |
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89 hash = ngx_murmur_hash2(val.data, val.len); |
| 3513 | 90 |
| 91 part = ctx->parts.elts; | |
| 92 | |
| 93 for (i = 0; i < ctx->parts.nelts; i++) { | |
| 94 | |
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95 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, |
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96 "stream split: %uD %uD", hash, part[i].percent); |
| 3513 | 97 |
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98 if (hash < part[i].percent || part[i].percent == 0) { |
| 3513 | 99 *v = part[i].value; |
| 100 return NGX_OK; | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 return NGX_OK; | |
| 105 } | |
| 106 | |
| 107 | |
| 108 static char * | |
| 109 ngx_conf_split_clients_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 110 { | |
| 111 char *rv; | |
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112 uint32_t sum, last; |
| 3513 | 113 ngx_str_t *value, name; |
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114 ngx_uint_t i; |
| 3513 | 115 ngx_conf_t save; |
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116 ngx_stream_variable_t *var; |
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117 ngx_stream_split_clients_ctx_t *ctx; |
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118 ngx_stream_split_clients_part_t *part; |
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119 ngx_stream_compile_complex_value_t ccv; |
| 3513 | 120 |
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121 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_stream_split_clients_ctx_t)); |
| 3513 | 122 if (ctx == NULL) { |
| 123 return NGX_CONF_ERROR; | |
| 124 } | |
| 125 | |
| 126 value = cf->args->elts; | |
| 127 | |
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128 ngx_memzero(&ccv, sizeof(ngx_stream_compile_complex_value_t)); |
| 3513 | 129 |
| 130 ccv.cf = cf; | |
| 131 ccv.value = &value[1]; | |
| 132 ccv.complex_value = &ctx->value; | |
| 133 | |
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134 if (ngx_stream_compile_complex_value(&ccv) != NGX_OK) { |
| 3513 | 135 return NGX_CONF_ERROR; |
| 136 } | |
| 137 | |
| 138 name = value[2]; | |
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139 |
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140 if (name.data[0] != '$') { |
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141 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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142 "invalid variable name \"%V\"", &name); |
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143 return NGX_CONF_ERROR; |
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144 } |
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145 |
| 3513 | 146 name.len--; |
| 147 name.data++; | |
| 148 | |
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149 var = ngx_stream_add_variable(cf, &name, NGX_STREAM_VAR_CHANGEABLE); |
| 3513 | 150 if (var == NULL) { |
| 151 return NGX_CONF_ERROR; | |
| 152 } | |
| 153 | |
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154 var->get_handler = ngx_stream_split_clients_variable; |
| 3513 | 155 var->data = (uintptr_t) ctx; |
| 156 | |
| 157 if (ngx_array_init(&ctx->parts, cf->pool, 2, | |
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158 sizeof(ngx_stream_split_clients_part_t)) |
| 3513 | 159 != NGX_OK) |
| 160 { | |
| 161 return NGX_CONF_ERROR; | |
| 162 } | |
| 163 | |
| 164 save = *cf; | |
| 165 cf->ctx = ctx; | |
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166 cf->handler = ngx_stream_split_clients; |
| 3513 | 167 cf->handler_conf = conf; |
| 168 | |
| 169 rv = ngx_conf_parse(cf, NULL); | |
| 170 | |
| 171 *cf = save; | |
| 172 | |
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173 if (rv != NGX_CONF_OK) { |
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174 return rv; |
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175 } |
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176 |
| 3513 | 177 sum = 0; |
| 178 last = 0; | |
| 179 part = ctx->parts.elts; | |
| 180 | |
| 181 for (i = 0; i < ctx->parts.nelts; i++) { | |
| 182 sum = part[i].percent ? sum + part[i].percent : 10000; | |
| 183 if (sum > 10000) { | |
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184 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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185 "percent total is greater than 100%%"); |
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186 return NGX_CONF_ERROR; |
| 3513 | 187 } |
| 188 | |
| 189 if (part[i].percent) { | |
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190 last += part[i].percent * (uint64_t) 0xffffffff / 10000; |
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191 part[i].percent = last; |
| 3513 | 192 } |
| 193 } | |
| 194 | |
| 195 return rv; | |
| 196 } | |
| 197 | |
| 198 | |
| 199 static char * | |
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200 ngx_stream_split_clients(ngx_conf_t *cf, ngx_command_t *dummy, void *conf) |
| 3513 | 201 { |
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202 ngx_int_t n; |
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203 ngx_str_t *value; |
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204 ngx_stream_split_clients_ctx_t *ctx; |
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205 ngx_stream_split_clients_part_t *part; |
| 3513 | 206 |
| 207 ctx = cf->ctx; | |
| 208 value = cf->args->elts; | |
| 209 | |
| 210 part = ngx_array_push(&ctx->parts); | |
| 211 if (part == NULL) { | |
| 212 return NGX_CONF_ERROR; | |
| 213 } | |
| 214 | |
| 215 if (value[0].len == 1 && value[0].data[0] == '*') { | |
| 216 part->percent = 0; | |
| 217 | |
| 218 } else { | |
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219 if (value[0].len == 0 || value[0].data[value[0].len - 1] != '%') { |
| 3513 | 220 goto invalid; |
| 221 } | |
| 222 | |
| 223 n = ngx_atofp(value[0].data, value[0].len - 1, 2); | |
| 224 if (n == NGX_ERROR || n == 0) { | |
| 225 goto invalid; | |
| 226 } | |
| 227 | |
| 228 part->percent = (uint32_t) n; | |
| 229 } | |
| 230 | |
| 231 part->value.len = value[1].len; | |
| 232 part->value.valid = 1; | |
| 233 part->value.no_cacheable = 0; | |
| 234 part->value.not_found = 0; | |
| 235 part->value.data = value[1].data; | |
| 236 | |
| 237 return NGX_CONF_OK; | |
| 238 | |
| 239 invalid: | |
| 240 | |
| 241 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 242 "invalid percent value \"%V\"", &value[0]); | |
| 243 return NGX_CONF_ERROR; | |
| 244 } |