Having issues with the http package in the core of go. It appears that the file contents is cached although the Content-Length in the response body is correct. To demonstrate here is a simplified version of the application I am writing.
package main
import (
"fmt"
"net/http"
)
func main() {
http.Handle("/", http.FileServer(http.Dir("./www/")))
err := http.ListenAndServe(":8080", nil)
if err != nil {
fmt.Println(err)
}
}
Now suppose we have a very simple html page:
<!doctype html>
<html>
<body>
<p>Hello there</p>
</body>
</html>
I execute the go program and access http://localhost:8080 in the browser to be presented with:
Hello there
Checking the response headers I can see the following:
Status Code:200 OK
Accept-Ranges:bytes
Content-Length:68
Content-Type:text/html; charset=utf-8
Date:Fri, 20 Dec 2013 10:04:03 GMT
Last-Modified:Fri, 20 Dec 2013 10:03:32 GMT
Now I edit the html file so the <p> tag contains Hello there everyone and reload the page. I get the following:
Hello there
Again looking at the response headers I get
Status Code:200 OK
Accept-Ranges:bytes
Content-Length:77
Content-Type:text/html; charset=utf-8
Date:Fri, 20 Dec 2013 10:04:34 GMT
Last-Modified:Fri, 20 Dec 2013 10:04:14 GMT
So the Content-Length has changed as well as last modified but not the actual file content delivered by the http.FileServer handler. This issue happens even after closing the program down and doing go run src/.../main.go. The only way I have found so far to clear the apparently cached version of the file is to reboot the machine the program is running on.
I have tried the following:
- Executing program on win / ubuntu / osx 10.8.5
- Going through the chain of functions / interfaces on golang.org/src to see if the served file is cached on disk anywhere
Any help with this would be very much appreciated.
