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Go语言拼接URL路径有多种方法建议用ResolveReference。
JoinPath
JoinPath会把多个多个路径合并成一个路径，并且处理../和./，多个//合并成单个/。
package main
import (
"fmt"
"net/url"
)
func main() {
u1 := "http://example.com/directory/"
u2 := "../../..//search?q=dotnet"
u3 := "/dir1/dir2/search?q=dotnet"
j1, _ := url.JoinPath(u1, u2)
j2, _ := url.JoinPath(u1, u3)
fmt.Println(j1)
// http://example.com/search%3Fq=dotnet
fmt.Println(j2)
// http://example.com/directory/dir1/dir2/search%3Fq=dotnet
}ResolveReference
ResolveReference会处理绝对路径和相对路径。
package main
import (
"fmt"
"log"
"net/url"
)
func main() {
u1, _ := url.Parse("../../..//search?q=dotnet")
u2, _ := url.Parse("/dir1/dir2/search?q=dotnet")
base, err := url.Parse("http://example.com/directory/")
if err != nil {
log.Fatal(err)
}
fmt.Println(base.ResolveReference(u1))
// http://example.com/search?q=dotnet
fmt.Println(base.ResolveReference(u2))
// http://example.com/dir1/dir2/search?q=dotnet
}path.Join
path主要是对斜杠放个的路径。
package main
import (
"fmt"
"log"
"net/url"
"path"
)
func main() {
u, err := url.Parse("http://example.com/test/")
if err != nil {
log.Fatal(err)
}
u.Path = path.Join(u.Path, "../bar.html")
s := u.String()
fmt.Println(s) // http://example.com/bar.html
}