apache mod_proxy ProxyPassReverse位置标头

Question

I have tomcat behind apache with the following setup:

ServerName someapp.com

ProxyPass / http://localhost:8080/someapp/
ProxyPassReverse / http://localhost:8080/someapp/

Everything works fine until tomcat response header contains something like:

Location: /someapp/foo

It causes 404 or 500 because the browser goes to " http://someapp.com/someapp/foo " instead of " http://someapp.com/foo/ "

What i did wrong?

Answer 1

Because ProxyPassReverse will replace the Location which your server returned.
In your case, you can see example 1.

Example 1 (Only URL Path)

Apache2 Setting

ProxyPass "/8080" "http://localhost:8080"
ProxyPassReverse "/8080/" "/"

Node.js Setting

const express = require("express");
const app = express()

app.get('/', (req, res) => {
    res.json({a: 8080})
})

app.get("/hi", (req, res) => {
    res.json({a: "8080hi"})
})

app.get("/redirect", (req, res) => {
    res.redirect("/hi")
})

app.listen(8080)

Original Location is "Location: /hi".
New one is "Location: /8080/hi". (/ => /8080/)

That means Apache2 replaced the Location value with ProxyPassReverse setting.
Or you can use full FQDN to do it.

Example 2 (FQDN)

Apache2 Setting

ProxyPass "/8080" "http://localhost:8080"
ProxyPassReverse "/8080" "http://localhost:8080"

Node.js Setting

const express = require("express");
const app = express()

app.get('/', (req, res) => {
    res.json({a: 8080})
})

app.get("/hi", (req, res) => {
    res.json({a: "8080hi"})
})

app.get("/redirect", (req, res) => {
    res.setHeader("Location", "http://localhost:8080/hi")
    res.send(302)
})

app.listen(8080)

Answer 2

不确定这是最好的方法，但是到目前为止，发现的唯一解决方法是使用mod标头：

Header edit Location ^/someapp/ http://someapp.com/