How to serve static files from all routes except one in Gin? [duplicate] - go

Question

This question already has answers here:
Gin router: path segment conflicts with existing wildcard
(2 answers)
Closed 9 months ago.
As the title says, consider a Gin router where I want to serve static files from all routes except one. Let's say this one route is /api. A first attempt might look like this:
package main
import (
"github.com/gin-gonic/gin"
)
func main() {
r := gin.Default()
r.StaticFS("/", gin.Dir("static", false))
r.GET("/api/v1/foo", func(c *gin.Context) { c.JSON(200, gin.H{"foo": true}) })
r.Run(":9955")
}
The RouterGroup.StaticFS (and Static too) under the hood joins the relative path with a wildcard path param: path.Join(relativePath, "/*filepath"). When relativePath is the root path /, it will panic with:
panic: '/api/v1/foo' in new path '/api/v1/foo' conflicts with existing wildcard '/*filepath' in existing prefix '/*filepath'
This is due to Gin's http router implementation: routing matches on the path prefix, so a wildcard on root will conflict with every other route. More details about this behavior can be found here — which is where this question was raised.
Another possible solution is to prefix the static file route, so that it doesn't conflict with /api:
r.StaticFS("/static", gin.Dir("static", false))
but this doesn't allow me to serve assets from root too. How can I have a wildcard, or equivalent, on root and still match on one specific path?

Answer 1

There is a package called static for this.
https://github.com/gin-contrib/static#canonical-example
just modify the example as follows
package main
import (
"github.com/gin-contrib/static"
"github.com/gin-gonic/gin"
)
func main() {
r := gin.Default()
// server a directory called static
r.Use(static.Serve("/", static.LocalFile("static", false)))
// And any route as usual
r.GET("/api/ping", func(c *gin.Context) {
c.String(200, "ping")
})
r.Run(":9955")
}