mirror of
https://github.com/harness/drone.git
synced 2025-05-06 00:00:55 +08:00
97 lines
3.1 KiB
Go
97 lines
3.1 KiB
Go
package encode
|
|
|
|
import (
|
|
"fmt"
|
|
"net/http"
|
|
"net/url"
|
|
"strings"
|
|
)
|
|
|
|
/*
|
|
* Wraps an http.HandlerFunc in a layer that encodes FQNs coming as part of the GIT api
|
|
* (e.g. "space1/repo.git") before executing the provided http.HandlerFunc.
|
|
* The first prefix that matches the URL.Path will be used during encoding.
|
|
*/
|
|
func GitFqnBefore(h http.HandlerFunc) http.HandlerFunc {
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
|
r, _ = encodeFQNWithMarker(r, "", ".git", false)
|
|
h.ServeHTTP(w, r)
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Wraps an http.HandlerFunc in a layer that encodes a terminated FQN (e.g. "/space1/space2/+")
|
|
* before executing the provided http.HandlerFunc.
|
|
* The first prefix that matches the URL.Path will be used during encoding.
|
|
*/
|
|
func TerminatedFqnBefore(prefixes []string, h http.HandlerFunc) http.HandlerFunc {
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
|
for _, p := range prefixes {
|
|
// IMPORTANT: define changed separately to avoid overshadowing r
|
|
changed := false
|
|
if r, changed = encodeFQNWithMarker(r, p, "/+", false); changed {
|
|
break
|
|
}
|
|
}
|
|
|
|
h.ServeHTTP(w, r)
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function encodes an FQN followed by a custom marker and returns a request with an updated URL.Path.
|
|
* A non-empty prefix can be provided to encode encode only after the prefix.
|
|
* It allows our Rest API to handle paths of the form "/spaces/space1/space2/+/authToken"
|
|
*
|
|
* Examples:
|
|
* Prefix: "" Path: "/space1/space2/+" => "/space1%2Fspace2"
|
|
* Prefix: "" Path: "/space1/space2.git" => "/space1%2Fspace2"
|
|
* Prefix: "/spaces" Path: "/spaces/space1/space2/+/authToken" => "/spaces/space1%2Fspace2/authToken"
|
|
*/
|
|
func encodeFQNWithMarker(r *http.Request, prefix string, marker string, keepMarker bool) (*http.Request, bool) {
|
|
// In case path doesn't start with prefix - nothing to encode
|
|
if len(r.URL.Path) < len(prefix) || r.URL.Path[0:len(prefix)] != prefix {
|
|
return r, false
|
|
}
|
|
|
|
originalSubPath := r.URL.Path[len(prefix):]
|
|
fqn, suffix, found := strings.Cut(originalSubPath, marker)
|
|
|
|
// If we don't find a marker - nothing to encode
|
|
if !found {
|
|
return r, false
|
|
}
|
|
|
|
// if marker was found - convert to escaped version (skip first character in case path starts with '/')
|
|
escapedFqn := fqn[0:1] + strings.Replace(fqn[1:], "/", "%2F", -1)
|
|
if keepMarker {
|
|
escapedFqn += marker
|
|
}
|
|
updatedSubPath := escapedFqn + suffix
|
|
|
|
// TODO: Proper Logging
|
|
fmt.Printf(
|
|
"[Encode] prefix: '%s', marker: '%s', original: '%s', updated: '%s'.\n",
|
|
prefix,
|
|
marker,
|
|
originalSubPath,
|
|
updatedSubPath)
|
|
|
|
/*
|
|
* Return shallow clone with updated URL, similar to http.StripPrefix or earlier version of request.WithContext
|
|
* https://cs.opensource.google/go/go/+/refs/tags/go1.19:src/net/http/server.go;l=2138
|
|
* https://cs.opensource.google/go/go/+/refs/tags/go1.18:src/net/http/request.go;l=355
|
|
*
|
|
* http.StripPrefix initially changed the path only, but that was updated because of official recommendations:
|
|
* https://github.com/golang/go/issues/18952
|
|
*/
|
|
r2 := new(http.Request)
|
|
*r2 = *r
|
|
r2.URL = new(url.URL)
|
|
*r2.URL = *r.URL
|
|
r2.URL.Path = prefix + updatedSubPath
|
|
r2.URL.RawPath = ""
|
|
|
|
return r2, true
|
|
}
|