1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
--[[
Copyright (C) 2016 ZTE, Inc. and others. All rights reserved. (ZTE)
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
--]]
local msbConf = require('conf.msbinit')
local svcConf = require('conf.svcconf')
local dbclient = require('dao.db_access')
local tbl_util = require('lib.utils.table_util')
local svc_util = require('lib.utils.svc_util')
local log_util = require('lib.utils.log_util')
local tbl_concat = table.concat
local tbl_isempty = tbl_util.isempty
local svc_isactive = svc_util.isactive
local svc_setauthheader = svc_util.setauthheader
local svc_isautodiscover = svc_util.isautodiscover
local str_sub = string.sub
local str_len = string.len
local str_low = string.lower
local ngx_var = ngx.var
local ngx_ctx = ngx.ctx
local log = log_util.log
local defaultport = msbConf.systemConf.defaultport
local defaultprefix = msbConf.systemConf.defaultprefix
local enablerefercheck = msbConf.systemConf.enablerefercheck
local useconsultemplate = msbConf.systemConf.useconsultemplate
local urlfieldMap = svcConf.urlfieldMap
local donotfound = function()
ngx.status = ngx.HTTP_NOT_FOUND
ngx.say("service info not found!")
return ngx.exit(ngx.status)
end
---------------------------------------------------------------
--preCheck:
-- determine whether it is websocket request
-- and do internal redirect
---------------------------------------------------------------
local http_upgrade = ngx_var.http_upgrade
if(ngx_var.websocket_internal_redirect == "on") and http_upgrade and str_low(http_upgrade)== "websocket" then
ngx.log(ngx.ERR, "Websocket request and redirect to @customwebsocket")
return ngx.exec("@customwebsocket");
end
---------------------------------------------------------------
--step0:Preparation
-- svcnames:service names registered under this port
---------------------------------------------------------------
local sys_prefix = ""
local server_port = ngx_var.server_port
if(server_port == defaultport) then
sys_prefix = defaultprefix
else
sys_prefix = server_port
end
local custom_svc_keypattern = tbl_concat({sys_prefix,"custom","*"},":")
local get_svcinfokey_custom = function(svcname)
return tbl_concat({sys_prefix,"custom",svcname,"info"},":")
end
local get_svcserverpattern_custom = function(svcname)
return tbl_concat({sys_prefix,"custom",svcname,"lb:server*"},":")
end
local svcnames,err = dbclient.load_customsvcnames(custom_svc_keypattern)
if not svcnames then
donotfound()
end
---------------------------------------------------------------
--step1:run the match process(check whether the request
-- match the name in the svcnames one by one)
-- and return the matched serice info
---------------------------------------------------------------
local req_res = ngx_var.uri
local svc_type = ngx_var.svc_type
local matchedsvcname
local svcinfo
--add by wangyg:20160418 special handler for refer
local matched_usingrefer = false
--end of add by wangyg:20160418 special handler for refer
for _, svcname in ipairs(svcnames) do
if (svcname == "/") then
local svc_info_key = get_svcinfokey_custom(svcname)
local svc_info,err = dbclient.load_serviceinfo(svc_info_key)
if svc_info and svc_isactive(svc_info)then
matchedsvcname = svcname
svcinfo = svc_info
break
end
end
local from, to, err = ngx.re.find(req_res, "^"..svcname.."(/(.*))?$", "jo")
--check whether svcname is the prefix of the req uri
if from then
local svc_info_key = get_svcinfokey_custom(svcname)
local svc_info,err = dbclient.load_serviceinfo(svc_info_key)
if svc_info and svc_isactive(svc_info) then
matchedsvcname = svcname
svcinfo = svc_info
break
end
else
--do nothing
end
end
---------------------------------------------------------------
--step1.1:additional process,test against the refer
-- similar to step1
---------------------------------------------------------------
--add by wangyg:20160418 special handler for refer
if not matchedsvcname and enablerefercheck then
local refer = ngx_var.http_referer
if(refer and refer~="") then
for _, svcname in ipairs(svcnames) do
local urlreg ="^(https://|http://|)(([1-9]|([1-9]\\d)|(1\\d\\d)|(2([0-4]\\d|5[0-5])))\\.)(([0-9]|([1-9]\\d)|(1\\d\\d)|(2([0-4]\\d|5[0-5])))\\.){2}([1-9]|([1-9]\\d)|(1\\d\\d)|(2([0-4]\\d|5[0-5])))(:\\d{1,5})?"..svcname.."(/(.*))?$";
local from, to, err = ngx.re.find(refer, urlreg, "jo")
----check whether svcname is the prefix of the req refer
if from then
local svc_info_key = get_svcinfokey_custom(svcname)
local svc_info,err = dbclient.load_serviceinfo(svc_info_key)
if svc_info and svc_isactive(svc_info) then
matchedsvcname = svcname
svcinfo = svc_info
matched_usingrefer = true
break
end
end
end
end
end
--end of add by wangyg:20160418 special handler for refer
if not matchedsvcname or tbl_isempty(svcinfo) then
donotfound()
end
local svc_url = svcinfo[urlfieldMap[svc_type]]
if not svc_url then
donotfound()
end
---------------------------------------------------------------
--step2:rewrite the request uri using the svcinfo
---------------------------------------------------------------
local rewrited_uri =""
if (matchedsvcname == "/") then
--special handling: if "/" matched, contact directly
rewrited_uri = svc_url..req_res
else
--rewrited_uri = ngx.re.sub(req_res, "^"..matchedsvcname.."(.*)", svc_url.."$1", "o")
local newuri,n,err = ngx.re.sub(req_res, "^"..matchedsvcname.."(/.*)?", svc_url.."$1", "o")
--add by wangyg:20160418 special handler for refer
if(n==0 and matched_usingrefer) then newuri = svc_url..req_res end --special handling if matched using refer
--end of add by wangyg:20160418 special handler for refer
rewrited_uri = newuri
end
if (rewrited_uri == "") then rewrited_uri = "/" end --avoid throws internal error when it is empty
ngx.req.set_uri(rewrited_uri)
--set the matched service info,used in the proxy_redirect directive
ngx_var.svc_name = matchedsvcname
ngx_var.svc_url = svc_url
--log the route info
log("matchedservice",matchedsvcname)
if(matched_usingrefer) then log("matched_usingrefer",true) end
log("rewrited_uri",rewrited_uri)
---------------------------------------------------------------
--step2.1:if this service is inter-system,add custom http header
---------------------------------------------------------------
svc_setauthheader(svcinfo)
---------------------------------------------------------------
--step3:process the proxy upstream part
-- con1-using consul template:set the upstream name
-- con2-using msb balancer:query the backserver list and store in the ctx
---------------------------------------------------------------
if useconsultemplate and svc_isautodiscover(svcinfo) then
--FIX ME:if svcname contains "/", the upstream name may be illegal
ngx_var.backend = ngx.re.sub(matchedsvcname, "^/(.*)", "$1", "o")
else
local svc_server_keypattern = get_svcserverpattern_custom(matchedsvcname)
local backservers,err = dbclient.load_backservers(svc_server_keypattern)
if tbl_isempty(backservers) then
donotfound()
end
ngx_ctx.backservers = backservers
ngx_ctx.svcserverpattern = svc_server_keypattern
end
|
