Matti R
a31e14177e
* ci: migrate from Travis to GitHub Actions Co-authored-by: unknwon <u@gogs.io> * Fix lint errors * README * Fix tests on Windows * Skip test Co-authored-by: Sourcegraph Bot <campaigns@sourcegraph.com>
77 lines
2.1 KiB
Go
77 lines
2.1 KiB
Go
// Copyright 2013 Martini Authors
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// Copyright 2014 The Macaron Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"): you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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package macaron
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import (
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"net/http"
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"reflect"
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"gitea.com/macaron/inject"
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)
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// ReturnHandler is a service that Martini provides that is called
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// when a route handler returns something. The ReturnHandler is
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// responsible for writing to the ResponseWriter based on the values
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// that are passed into this function.
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type ReturnHandler func(*Context, []reflect.Value)
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func canDeref(val reflect.Value) bool {
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return val.Kind() == reflect.Interface || val.Kind() == reflect.Ptr
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}
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func isError(val reflect.Value) bool {
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_, ok := val.Interface().(error)
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return ok
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}
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func isByteSlice(val reflect.Value) bool {
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return val.Kind() == reflect.Slice && val.Type().Elem().Kind() == reflect.Uint8
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}
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func defaultReturnHandler() ReturnHandler {
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return func(ctx *Context, vals []reflect.Value) {
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rv := ctx.GetVal(inject.InterfaceOf((*http.ResponseWriter)(nil)))
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resp := rv.Interface().(http.ResponseWriter)
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var respVal reflect.Value
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if len(vals) > 1 && vals[0].Kind() == reflect.Int {
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resp.WriteHeader(int(vals[0].Int()))
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respVal = vals[1]
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} else if len(vals) > 0 {
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respVal = vals[0]
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if isError(respVal) {
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err := respVal.Interface().(error)
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if err != nil {
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ctx.internalServerError(ctx, err)
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}
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return
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} else if canDeref(respVal) {
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if respVal.IsNil() {
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return // Ignore nil error
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}
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}
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}
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if canDeref(respVal) {
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respVal = respVal.Elem()
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}
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if isByteSlice(respVal) {
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_, _ = resp.Write(respVal.Bytes())
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} else {
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_, _ = resp.Write([]byte(respVal.String()))
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}
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}
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}
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