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// Copyright 2015 Matthew Holt and The Caddy Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package caddyscript
import (
"fmt"
"net/http"
"github.com/starlight-go/starlight/convert"
"go.starlark.net/starlark"
)
// HTTPRequest represents an http request type in caddyscript.
type HTTPRequest struct{ Req *http.Request }
// AttrNames defines what properties and methods are available on the HTTPRequest type.
func (r HTTPRequest) AttrNames() []string {
return []string{"header", "query", "url", "method", "host", "tls", "redirect"}
}
func (r HTTPRequest) Freeze() {}
func (r HTTPRequest) Hash() (uint32, error) { return 0, fmt.Errorf("unhashable: HTTPRequest") }
func (r HTTPRequest) String() string { return fmt.Sprint(r.Req) }
func (r HTTPRequest) Type() string { return "HTTPRequest" }
func (r HTTPRequest) Truth() starlark.Bool { return true }
// Header handles returning a header key.
func (r HTTPRequest) Header(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
var key string
err := starlark.UnpackPositionalArgs(fn.Name(), args, kwargs, 1, &key)
if err != nil {
return starlark.None, fmt.Errorf("get request header: %v", err.Error())
}
return starlark.String(r.Req.Header.Get(key)), nil
}
// Redirect handles an http redirect from starlark code.
func (r HTTPRequest) Redirect(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
var w starlark.Value
var req HTTPRequest
var newURL string
err := starlark.UnpackPositionalArgs(fn.Name(), args, kwargs, 3, &w, &req, &newURL)
if err != nil {
return starlark.None, fmt.Errorf("unpacking arguments: %v", err.Error())
}
writer := convert.FromValue(w)
if w, ok := writer.(http.ResponseWriter); ok {
http.Redirect(w, req.Req, newURL, http.StatusSeeOther)
return starlark.None, nil
}
return starlark.None, fmt.Errorf("first provided argument is not http.ResponseWriter")
}
// Attr defines what happens when props or methods are called on the HTTPRequest type.
func (r HTTPRequest) Attr(name string) (starlark.Value, error) {
switch name {
case "redirect":
b := starlark.NewBuiltin("Redirect", r.Redirect)
b = b.BindReceiver(r)
return b, nil
case "tls":
tls := new(starlark.Dict)
tls.SetKey(starlark.String("cipher_suite"), starlark.MakeUint(uint(r.Req.TLS.CipherSuite)))
tls.SetKey(starlark.String("did_resume"), starlark.Bool(r.Req.TLS.DidResume))
tls.SetKey(starlark.String("handshake_complete"), starlark.Bool(r.Req.TLS.HandshakeComplete))
tls.SetKey(starlark.String("negotiated_protocol"), starlark.String(r.Req.TLS.NegotiatedProtocol))
tls.SetKey(starlark.String("negotiated_protocol_is_mutual"), starlark.Bool(r.Req.TLS.NegotiatedProtocolIsMutual))
tls.SetKey(starlark.String("server_name"), starlark.String(r.Req.TLS.ServerName))
tls.SetKey(starlark.String("version"), starlark.String(r.Req.TLS.Version))
return tls, nil
case "header":
b := starlark.NewBuiltin("Header", r.Header)
b = b.BindReceiver(r)
return b, nil
case "query":
qVals := r.Req.URL.Query()
query := starlark.NewDict(len(qVals))
for k, v := range qVals {
query.SetKey(starlark.String(k), starlark.String(v[0]))
}
return query, nil
case "url":
return starlark.String(r.Req.URL.Path), nil
case "method":
return starlark.String(r.Req.Method), nil
case "host":
return starlark.String(r.Req.Host), nil
}
return nil, nil
}
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