2022-12-29 04:48:56 发布人:hao333 阅读( 7248)
经常需要配置Nginx,其中有许多以$开头的变量,经常需要查阅nginx所支持的变量。
经常需要配置nginx,其中有许多以$开头的变量,经常需要查阅nginx所支持的变量。
可能是对Ngixn资源不熟悉,干脆就直接读源码,分析出支持的变量。
Nginx支持的超文本传送协议(超文本传输协议的缩写)变量实现在ngx _ http _变量。c的 ngx_http_core_variables存储实现:
ngx _ http _核心_变量
一静态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 _变量_二进制_远程_地址,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 _ real path _ 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 _变量_请求,
75 offsetof(ngx_http_request_t,args),
76 NGX _ HTTP _ VAR _ changable | NGX _ HTTP _ VAR _ no cache able,0 },
77
78 { ngx_string('is_args '),NULL,ngx_http_variable_is_args,
79 0,NGX_HTTP_VAR_NOCACHEABLE,0 },
80
81 { ngx_string('请求_文件名'),空,
82 ngx _ http _变量_请求_文件名,0,
83 NGX_HTTP_VAR_NOCACHEABLE,0 },
84
85 { ngx_string('服务器名称'),NULL,ngx _ http _变量_服务器名称,0,0,0 }
86
87 { ngx_string('request_method '),NULL,
88 ngx _ http _变量_请求_方法,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 _变量_请求_完成,
98 0, 0, 0 },
99
100 { ngx_string('request_body '),NULL,
101 ngx _ http _变量_请求_正文
102 0, 0, 0 },
103
104 { ngx _ string(' request _ body _ file '),NULL,
105 ngx _ http _变量_请求_正文_文件,
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 _变量_发送位置,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 _变量_发送的连接,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 _变量_请求_获取_大小,
134 offsetof(ngx_http_request_t,limit_rate),
135 NGX _ HTTP _ VAR _ changable | NGX _ HTTP _ VAR _ no cache able,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 };
把这些变量提取下,总结如下:
nginx防DDOS攻击的简单配置
nginx本身就有防军械服务局副局长军火服务司副司长攻击这方面的模块ngx _ http _ limit _ req _模块和ngx_http_limit_conn_module
一、基本介绍
1.ngx _ http _ limit _ req _模块
配置格式及说明:
设置一个缓存区保存不同键的状态,这里的状态是指当前的过量请求数。而键是由可变的指定的,是一个非空的变量,我们这里使用$binary_remote_addr,表示源互联网协议(互联网协议)为键值。
limit _ req _ zone $ variable zone=name:size rate=rate;
指定要进行限制的缓存区和最大的请求到达后有多少个请求放入延迟队列(其它的直接丢弃)。如果不希望请求
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