1. Scene description
First explain that the gateway used in the next project is: springcloud gateway, because it needs to provide custom configuration routing rules for each gateway service system, it takes effect in real time, without restarting the gateway (restart risk is high), and it has been implemented: dynamic loading of custom routing files, Dynamically load the routing rules in the routing file.
2. Solution
2.1 Solutions
Create a new general monitoring category, monitor the gateway service routing rule configuration file, and then each routing configuration file monitors whether the content of its own file content changes, and dynamically loads it into the springcloud gateway.
2.2 Description of configuration rules
bc-ruanjianlaowang-all.yaml is the name of the configuration file that needs to be loaded. It is created with monitoring. When a new custom routing rule file is added, the custom rule will be automatically refreshed.
gateways: bc-ruanjianlaowang-demo.json,bc-ruanjianlaowang-auth.json
Create a custom routing rule file. At present, two new gateway service files have been created, bc-ruanjianlaowang-demo.json and bc-ruanjianlaowang-auth.json. You only need to configure custom rules. There will be other gateway services in the future. Add a custom rule json file, and then configure the file name in bc-ruanjianlaowang-all.yaml. It will automatically load and take effect in real time without restarting the gateway.
2.2.1 Rule example description
[
{
"id": "demo-router3","uri":"lb://demo","order": 0,
"filters": [{"name":"StripPrefix","args":{"_genkey_0":"1"}}],
"predicates":
[{"args": {"pattern":"/demo/test/v?1"},"name":"Path"}]
}
]
Description:
(1) "id": "demo-router3", try to use the center name + router + serial number as the id, and it must be unique;
(2) "uri": "lb://demo", here can be the service name of other centers in the registration center, if there are multiple services, the default load balance, polling access to the corresponding service provided later; also possible Configuration: "uri": "http://10.192.168.10.:8010/", this configuration is for the old service not registered in the registry, and the path needs to be configured.
(3) "filters": [{"name":"StripPrefix","args":{"_genkey_0":"1"}}], the meaning here is that removing the first layer path by default is equivalent to removing the demo for access
(4) [{"args": {"pattern":"/demo/test/v?1"},"name":"Path"}] Here are the specific custom configuration rules, follow the rules below Configuration.
2.2.2 Description of path customization rules
Because springcloud gateway uses spring's AntPathMatcher for path matching, simply copy the custom configuration rules to explain, or you can directly look at it on Baidu.
(1) URLs can be matched, the rules are as follows
? Match a character
*Match 0 or more characters
**Match 0 or more directories
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(2) The use case is as follows
/trip/api/*x 匹配 /trip/api/x，/trip/api/ax，/trip/api/abx ；但不匹配 /trip/abc/x；
/trip/a/a?x 匹配 /trip/a/abx；但不匹配 /trip/a/ax，/trip/a/abcx
/**/api/alie 匹配 /trip/api/alie，/trip/dax/api/alie；但不匹配 /trip/a/api
/**/*.htmlm 匹配所有以.htmlm结尾的路径
/app/*.x 匹配(Matches)所有在app路径下的.x文件
/app/p?ttern 匹配(Matches) /app/pattern 和 /app/pXttern,但是不包括/app/pttern
/**/example 匹配(Matches) /app/example, /app/foo/example, 和 /example
/app/**/dir/file. 匹配(Matches) /app/dir/file.jsp, /app/foo/dir/file.html,/app/foo
/bar/dir/file.pdf, 和 /app/dir/file.java
/**/*.jsp 匹配(Matches)任何的.jsp 文件
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(3) In addition
Springcloud or spring is not very good for path matching and regular support, but it can also be used, just take it briefly.
符号 {spring:[a-z]+}
示例代码:
@RequestMapping("/index/{username:[a-b]+}")
@ResponseBody
public String index(@PathVariable("username") String username){
System.out.println(username);
return username;
}
结果:
index/ab true 输出 ab
index/abbaaa true 输出 abbaaa
index/a false 404错误
index/ac false 404错误
The original code of the gateway is to open all services by default. After the new code, it will follow the custom rules. If it is not configured, the jump will be prohibited.
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