golang - HTTP client always escaped the URL - http

Question

Is there anyway for golang HTTP client,not to escape the requested URL.
For example, a request for URL "/test(a)", gets escaped to "/test%28a%29".
I'm running the code from https://github.com/cmpxchg16/gobench

Answer 1

You can set an opaque url.
Assuming you want the url to point to http://example.com/test(a) you would want to do:
req.NewRequest("GET", "http://example.com/test(a)", nil)
req.URL = &url.URL{
Scheme: "http",
Host: "example.com",
Opaque: "//example.com/test(a)",
}
client.Do(req)
Example: http://play.golang.org/p/09V67Hbo6H
Documentation: http://golang.org/pkg/net/url/#URL

Answer 2

This appears to be a bug in the URL package:
https://code.google.com/p/go/issues/detail?id=6784
and https://code.google.com/p/go/issues/detail?id=5684

Answer 3

You need to set Unescaped Path to URL Path and Encoded Path to RawURL or else it will double escape e.g.
package main
import (
"fmt"
"net/url"
)
func main() {
doubleEncodedURL := &url.URL{
Scheme: "http",
Host: "example.com",
Path: "/id/EbnfwIoiiXbtr6Ec44sfedeEsjrf0RcXkJneYukTXa%2BIFVla4ZdfRiMzfh%2FEGs7f/events",
}
rawEncodedURL := &url.URL{
Scheme: "http",
Host: "example.com",
Path: "/id/EbnfwIoiiXbtr6Ec44sfedeEsjrf0RcXkJneYukTXa+IFVla4ZdfRiMzfh/EGs7f/events",
RawPath: "/id/EbnfwIoiiXbtr6Ec44sfedeEsjrf0RcXkJneYukTXa%2BIFVla4ZdfRiMzfh%2FEGs7f/events",
}
fmt.Printf("doubleEncodedURL is : %s\n", doubleEncodedURL)
fmt.Printf("rawEncodedURL is : %s\n", rawEncodedURL)
}
Playground link: https://play.golang.org/p/rOrVzW8ZJCQ