How to configure Python CGI run on Tomcat server

Want to request triggers a non-java applications deployed on tomcat, you need to use the Common Gateway Interface (CGI). Tomcat Servlet CGI provides support.

 

• Modify web.xml

web.xml configuration file in the default annotated CGIServlet, only need to open the comment. Modify apache-tomcat-xxxx / conf / web.xml file can affect all deployed applications on the server. In addition, there are several configuration requires attention,

cgiPathPrefix: subordinates applications, location cgi script. tomcat will be looking at what the directory for all applications.

executable: program execution CGI scripts.

passShellEnvironment: the shell environment variables. 

URL pattern: the practical application of webroot + / cgi-bin / *

 1 <servlet>
 2         <servlet-name>cgi</servlet-name>
 3         <servlet-class>org.apache.catalina.servlets.CGIServlet</servlet-class>
 4         <init-param>
 5           <param-name>cgiPathPrefix</param-name>
 6           <param-value>WEB-INF/cgi</param-value>
 7         </init-param>
 8         <init-param>
 9             <param-name>executable</param-name>
10             <param-value>C:\Anaconda3\python.exe</param-value>
11         </init-param>
12         <init-param>
13             <param-name>passShellEnvironment</param-name>
14             <param-value>true</param-value>
15         </init-param>
16         <load-on-startup>5</load-on-startup>
17     </servlet>
18 
19 　　<servlet-mapping>
20         <servlet-name>cgi</servlet-name>
21         <url-pattern>/cgi-bin/*</url-pattern>
22     </servlet-mapping>

 

• Modify context.xml

Modify apache-tomcat-xxxx / conf / context.xml file will affect all applications deployed on the server.

<Context privileged="true">

• The python script to deploy a web application

Creating hello.py, put it in a web application test under the project, "WEB-INF / cgi" directory.

from os import *
from cgi import *

print('Hello')

• Access program in the browser

http://localhost:8180/test/cgi-bin/hello.py

19-Dec-2019 14:39:55.232 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8109"]
19-Dec-2019 14:39:55.249 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 15210 ms
19-Dec-2019 14:40:04.408 INFO [http-nio-8180-exec-2] org.apache.catalina.servlets.CGIServlet$CGIRunner.run Bad header line [Hello]