java-web - Tomcat+Nginx implements the function of dynamic and static separation. Why are dynamic requests not sent to Tomcat? (solved)-PHP Chinese Network Q&A

question

RT
Because I want to learn Nginx server recently, I want to build a Tomcat+Nginx to simply realize the function of dynamic and static separation.

Specific code and configuration

Version

Ubuntu：ubuntu-16.04-desktop-amd64
JDK：jdk1.8.0_101
Tomcat：apache-tomcat-8.5.4
Nginx：nginx/1.10.0
ubuntu ip:192.168.182.129

Tomcat configuration (/conf/server.xml)

<?xml version="1.0" encoding="UTF-8"?>
<!--
  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You 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.
-->
<!-- Note:  A "Server" is not itself a "Container", so you may not
     define subcomponents such as "Valves" at this level.
     Documentation at /docs/config/server.html
 -->
<Server port="8005" shutdown="SHUTDOWN">
  <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
  <!-- Security listener. Documentation at /docs/config/listeners.html
  <Listener className="org.apache.catalina.security.SecurityListener" />
  -->
  <!--APR library loader. Documentation at /docs/apr.html -->
  <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
  <!-- Prevent memory leaks due to use of particular java/javax APIs-->
  <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
  <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />

  <!-- Global JNDI resources
       Documentation at /docs/jndi-resources-howto.html
  -->
  <GlobalNamingResources>
    <!-- Editable user database that can also be used by
         UserDatabaseRealm to authenticate users
    -->
    <Resource name="UserDatabase" auth="Container"
              type="org.apache.catalina.UserDatabase"
              description="User database that can be updated and saved"
              factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
              pathname="conf/tomcat-users.xml" />
  </GlobalNamingResources>
  <Service name="Catalina">
    <Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />

    <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />

    <Engine name="Catalina" defaultHost="localhost">

      <Realm className="org.apache.catalina.realm.LockOutRealm">
        <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
               resourceName="UserDatabase"/>
      </Realm>

      <Host name="test.nt.springmvc.com"  appBase="webapps/springmvc"
            unpackWARs="true" autoDeploy="true">

        <Context path="/springmvc"  docBase="springmvc.war"/>    
        
        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
               prefix="localhost_access_log" suffix=".txt"
               pattern="%h %l %u %t &quot;%r&quot; %s %b" />

      </Host>
    </Engine>
  </Service>
</Server>

Nginx configuration (/nginx/sites-available/default)

upstream tomcat {   
 server 192.168.182.129:8080;   
} 


server {
    listen 80 default_server;
    listen [::]:80 ;

    root /opt/apache-tomcat-8.5.4/webapps/springmvc;

    #server_name _;
    server_name test.nt.springmvc.com;

    location /{
        proxy_set_header        Host $host;
        proxy_set_header        X-Real-IP $remote_addr;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://tomcat;
        try_files $uri $uri/ =404;

    }
}

test

Through Tomcat, request url: http://test.nt.springmvc.com:...
Through Nginx, request url: http://test.nt.springmvc.com/
Through Nginx, request url: http://test.nt.springmvc.com/...
Through Nginx, request url: http://test.nt.springmvc.com/...

tomcat log

192.168.182.129 - - [28/Jul/2016:15:11:36 +0800] "GET /springmvc/test/ HTTP/1.1" 200 106
192.168.182.129 - - [28/Jul/2016:15:12:40 +0800] "GET / HTTP/1.0" 404 -
192.168.182.129 - - [28/Jul/2016:15:13:05 +0800] "GET /springmvc HTTP/1.0" 302 -
192.168.182.129 - - [28/Jul/2016:15:13:05 +0800] "GET /springmvc/ HTTP/1.0" 404 990

Nginx Log

192.168.182.129 - - [28/Jul/2016:15:12:40 +0800] "GET / HTTP/1.1" 404 0 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.182.129 - - [28/Jul/2016:15:13:05 +0800] "GET /springmvc HTTP/1.1" 302 5 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.182.129 - - [28/Jul/2016:15:13:05 +0800] "GET /springmvc/ HTTP/1.1" 404 441 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0"
192.168.182.129 - - [28/Jul/2016:15:13:37 +0800] "GET /springmvc/test HTTP/1.1" 404 152 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0"

As you can see from the logs, my fourth request was not forwarded to Tomcat. I searched many documents on the Internet and could not find where the problem occurred. The following is the corresponding web page

##Solution

Nginx configuration (/nginx/sites-available/default)

upstream tomcat {   
 server 192.168.182.129:8080;   
} 

server {
    listen 80 default_server;
    listen [::]:80 ;

    root /opt/apache-tomcat-8.5.4/webapps/springmvc;

    server_name test.nt.springmvc.com;

    location / {
        proxy_set_header        Host $host;
        proxy_set_header        X-Real-IP $remote_addr;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://tomcat;
        #try_files $uri $uri/ =404;
    }
}

You can see that in the nginx configuration file, comment out try_files $uri $uri/ =404 and you can access it normally

try_files

try_files on nginx determines whether the file exists

$uri

refers to the requested file and path, excluding things after "?" or "#"

$request_uri: /stat.php?id=1585378&web_id=1585378
$uri /stat.php
$document_uri: /stat.php