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nginx 全局變量及防DDOS攻擊的簡單配置

2020-05-27 13:44:18
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供稿:網(wǎng)友

   經(jīng)常需要配置Nginx ,其中有許多以 $ 開頭的變量,經(jīng)常需要查閱nginx 所支持的變量。

  可能是對 Ngixn資源不熟悉,干脆就直接讀源碼,分析出支持的變量。

  Nginx支持的http變量實現(xiàn)在 ngx_http_variables.c 的 ngx_http_core_variables存儲實現(xiàn):

  ngx_http_core_variables

  1 static ngx_http_variable_t ngx_http_core_variables[] = {

  2

  3 { ngx_string("http_host"), NULL, ngx_http_variable_header,

  4 offsetof(ngx_http_request_t, headers_in.host), 0, 0 },

  5

  6 { ngx_string("http_user_agent"), NULL, ngx_http_variable_header,

  7 offsetof(ngx_http_request_t, headers_in.user_agent), 0, 0 },

  8

  9 { ngx_string("http_referer"), NULL, ngx_http_variable_header,

  10 offsetof(ngx_http_request_t, headers_in.referer), 0, 0 },

  11

  12 #if (NGX_HTTP_GZIP)

  13 { ngx_string("http_via"), NULL, ngx_http_variable_header,

  14 offsetof(ngx_http_request_t, headers_in.via), 0, 0 },

  15 #endif

  16

  17 #if (NGX_HTTP_PROXY || NGX_HTTP_REALIP)

  18 { ngx_string("http_x_forwarded_for"), NULL, ngx_http_variable_header,

  19 offsetof(ngx_http_request_t, headers_in.x_forwarded_for), 0, 0 },

  20 #endif

  21

  22 { ngx_string("http_cookie"), NULL, ngx_http_variable_headers,

  23 offsetof(ngx_http_request_t, headers_in.cookies), 0, 0 },

  24

  25 { ngx_string("content_length"), NULL, ngx_http_variable_header,

  26 offsetof(ngx_http_request_t, headers_in.content_length), 0, 0 },

  27

  28 { ngx_string("content_type"), NULL, ngx_http_variable_header,

  29 offsetof(ngx_http_request_t, headers_in.content_type), 0, 0 },

  30

  31 { ngx_string("host"), NULL, ngx_http_variable_host, 0, 0, 0 },

  32

  33 { ngx_string("binary_remote_addr"), NULL,

  34 ngx_http_variable_binary_remote_addr, 0, 0, 0 },

  35

  36 { ngx_string("remote_addr"), NULL, ngx_http_variable_remote_addr, 0, 0, 0 },

  37

  38 { ngx_string("remote_port"), NULL, ngx_http_variable_remote_port, 0, 0, 0 },

  39

  40 { ngx_string("server_addr"), NULL, ngx_http_variable_server_addr, 0, 0, 0 },

  41

  42 { ngx_string("server_port"), NULL, ngx_http_variable_server_port, 0, 0, 0 },

  43

  44 { ngx_string("server_protocol"), NULL, ngx_http_variable_request,

  45 offsetof(ngx_http_request_t, http_protocol), 0, 0 },

  46

  47 { ngx_string("scheme"), NULL, ngx_http_variable_scheme, 0, 0, 0 },

  48

  49 { ngx_string("request_uri"), NULL, ngx_http_variable_request,

  50 offsetof(ngx_http_request_t, unparsed_uri), 0, 0 },

  51

  52 { ngx_string("uri"), NULL, ngx_http_variable_request,

  53 offsetof(ngx_http_request_t, uri),

  54 NGX_HTTP_VAR_NOCACHEABLE, 0 },

  55

  56 { ngx_string("document_uri"), NULL, ngx_http_variable_request,

  57 offsetof(ngx_http_request_t, uri),

  58 NGX_HTTP_VAR_NOCACHEABLE, 0 },

  59

  60 { ngx_string("request"), NULL, ngx_http_variable_request_line, 0, 0, 0 },

  61

  62 { ngx_string("document_root"), NULL,

  63 ngx_http_variable_document_root, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 },

  64

  65 { ngx_string("realpath_root"), NULL,

  66 ngx_http_variable_realpath_root, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 },

  67

  68 { ngx_string("query_string"), NULL, ngx_http_variable_request,

  69 offsetof(ngx_http_request_t, args),

  70 NGX_HTTP_VAR_NOCACHEABLE, 0 },

  71

  72 { ngx_string("args"),

  73 ngx_http_variable_request_set,

  74 ngx_http_variable_request,

  75 offsetof(ngx_http_request_t, args),

  76 NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE, 0 },

  77

  78 { ngx_string("is_args"), NULL, ngx_http_variable_is_args,

  79 0, NGX_HTTP_VAR_NOCACHEABLE, 0 },

  80

  81 { ngx_string("request_filename"), NULL,

  82 ngx_http_variable_request_filename, 0,

  83 NGX_HTTP_VAR_NOCACHEABLE, 0 },

  84

  85 { ngx_string("server_name"), NULL, ngx_http_variable_server_name, 0, 0, 0 },

  86

  87 { ngx_string("request_method"), NULL,

  88 ngx_http_variable_request_method, 0,

  89 NGX_HTTP_VAR_NOCACHEABLE, 0 },

  90

  91 { ngx_string("remote_user"), NULL, ngx_http_variable_remote_user, 0, 0, 0 },

  92

  93 { ngx_string("body_bytes_sent"), NULL, ngx_http_variable_body_bytes_sent,

  94 0, 0, 0 },

  95

  96 { ngx_string("request_completion"), NULL,

  97 ngx_http_variable_request_completion,

  98 0, 0, 0 },

  99

  100 { ngx_string("request_body"), NULL,

  101 ngx_http_variable_request_body,

  102 0, 0, 0 },

  103

  104 { ngx_string("request_body_file"), NULL,

  105 ngx_http_variable_request_body_file,

  106 0, 0, 0 },

  107

  108 { ngx_string("sent_http_content_type"), NULL,

  109 ngx_http_variable_sent_content_type, 0, 0, 0 },

  110

  111 { ngx_string("sent_http_content_length"), NULL,

  112 ngx_http_variable_sent_content_length, 0, 0, 0 },

  113

  114 { ngx_string("sent_http_location"), NULL,

  115 ngx_http_variable_sent_location, 0, 0, 0 },

  116

  117 { ngx_string("sent_http_last_modified"), NULL,

  118 ngx_http_variable_sent_last_modified, 0, 0, 0 },

  119

  120 { ngx_string("sent_http_connection"), NULL,

  121 ngx_http_variable_sent_connection, 0, 0, 0 },

  122

  123 { ngx_string("sent_http_keep_alive"), NULL,

  124 ngx_http_variable_sent_keep_alive, 0, 0, 0 },

  125

  126 { ngx_string("sent_http_transfer_encoding"), NULL,

  127 ngx_http_variable_sent_transfer_encoding, 0, 0, 0 },

  128

  129 { ngx_string("sent_http_cache_control"), NULL, ngx_http_variable_headers,

  130 offsetof(ngx_http_request_t, headers_out.cache_control), 0, 0 },

  131

  132 { ngx_string("limit_rate"), ngx_http_variable_request_set_size,

  133 ngx_http_variable_request_get_size,

  134 offsetof(ngx_http_request_t, limit_rate),

  135 NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE, 0 },

  136

  137 { ngx_string("nginx_version"), NULL, ngx_http_variable_nginx_version,

  138 0, 0, 0 },

  139

  140 { ngx_string("hostname"), NULL, ngx_http_variable_hostname,

  141 0, 0, 0 },

  142

  143 { ngx_string("pid"), NULL, ngx_http_variable_pid,

  144 0, 0, 0 },

  145

  146 { ngx_null_string, NULL, NULL, 0, 0, 0 }

  147 };

 

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