95 lines
3.0 KiB
Go
95 lines
3.0 KiB
Go
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain 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,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package thrift
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import (
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"context"
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)
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// See https://godoc.org/context#WithValue on why do we need the unexported typedefs.
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type responseHelperKey struct{}
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// TResponseHelper defines a object with a set of helper functions that can be
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// retrieved from the context object passed into server handler functions.
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//
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// Use GetResponseHelper to retrieve the injected TResponseHelper implementation
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// from the context object.
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//
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// The zero value of TResponseHelper is valid with all helper functions being
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// no-op.
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type TResponseHelper struct {
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// THeader related functions
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*THeaderResponseHelper
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}
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// THeaderResponseHelper defines THeader related TResponseHelper functions.
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//
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// The zero value of *THeaderResponseHelper is valid with all helper functions
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// being no-op.
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type THeaderResponseHelper struct {
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proto *THeaderProtocol
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}
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// NewTHeaderResponseHelper creates a new THeaderResponseHelper from the
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// underlying TProtocol.
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func NewTHeaderResponseHelper(proto TProtocol) *THeaderResponseHelper {
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if hp, ok := proto.(*THeaderProtocol); ok {
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return &THeaderResponseHelper{
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proto: hp,
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}
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}
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return nil
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}
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// SetHeader sets a response header.
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//
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// It's no-op if the underlying protocol/transport does not support THeader.
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func (h *THeaderResponseHelper) SetHeader(key, value string) {
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if h != nil && h.proto != nil {
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h.proto.SetWriteHeader(key, value)
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}
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}
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// ClearHeaders clears all the response headers previously set.
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//
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// It's no-op if the underlying protocol/transport does not support THeader.
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func (h *THeaderResponseHelper) ClearHeaders() {
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if h != nil && h.proto != nil {
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h.proto.ClearWriteHeaders()
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}
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}
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// GetResponseHelper retrieves the TResponseHelper implementation injected into
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// the context object.
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//
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// If no helper was found in the context object, a nop helper with ok == false
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// will be returned.
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func GetResponseHelper(ctx context.Context) (helper TResponseHelper, ok bool) {
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if v := ctx.Value(responseHelperKey{}); v != nil {
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helper, ok = v.(TResponseHelper)
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}
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return
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}
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// SetResponseHelper injects TResponseHelper into the context object.
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func SetResponseHelper(ctx context.Context, helper TResponseHelper) context.Context {
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return context.WithValue(ctx, responseHelperKey{}, helper)
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}
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