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route_params.go
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route_params.go
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// Copyright (c) 2018 Palantir Technologies. All rights reserved.
//
// 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 wrouter
import (
"github.com/palantir/pkg/metrics"
)
type RouteParam interface {
perms() RouteParamPerms
metricTags() metrics.Tags
}
type requestParamPermsFunc func() RouteParamPerms
func (f requestParamPermsFunc) perms() RouteParamPerms {
return f()
}
func (f requestParamPermsFunc) metricTags() metrics.Tags {
return nil
}
func RouteParamPermsParam(perms RouteParamPerms) RouteParam {
return requestParamPermsFunc(func() RouteParamPerms {
return perms
})
}
func SafePathParams(safeParams ...string) RouteParam {
return requestParamPermsFunc(func() RouteParamPerms {
return &requestParamPermsImpl{
pathParamPerms: newSafeParamPerms(safeParams...),
}
})
}
func ForbiddenPathParams(forbiddenParams ...string) RouteParam {
return requestParamPermsFunc(func() RouteParamPerms {
return &requestParamPermsImpl{
pathParamPerms: newForbiddenParamPerms(forbiddenParams...),
}
})
}
func SafeQueryParams(safeParams ...string) RouteParam {
return requestParamPermsFunc(func() RouteParamPerms {
return &requestParamPermsImpl{
queryParamPerms: newSafeParamPerms(safeParams...),
}
})
}
func ForbiddenQueryParams(forbiddenParams ...string) RouteParam {
return requestParamPermsFunc(func() RouteParamPerms {
return &requestParamPermsImpl{
queryParamPerms: newForbiddenParamPerms(forbiddenParams...),
}
})
}
func SafeHeaderParams(safeParams ...string) RouteParam {
return requestParamPermsFunc(func() RouteParamPerms {
return &requestParamPermsImpl{
headerParamPerms: newSafeParamPerms(safeParams...),
}
})
}
func ForbiddenHeaderParams(forbiddenParams ...string) RouteParam {
return requestParamPermsFunc(func() RouteParamPerms {
return &requestParamPermsImpl{
headerParamPerms: newForbiddenParamPerms(forbiddenParams...),
}
})
}
func toRequestParamPerms(params []RouteParam) RouteParamPerms {
var pathParamPerms []ParamPerms
var queryParamPerms []ParamPerms
var headerParamPerms []ParamPerms
for _, p := range params {
if p == nil {
continue
}
perms := p.perms()
if perms != nil {
pathParamPerms = append(pathParamPerms, perms.PathParamPerms())
queryParamPerms = append(queryParamPerms, perms.QueryParamPerms())
headerParamPerms = append(headerParamPerms, perms.HeaderParamPerms())
}
}
return &requestParamPermsImpl{
pathParamPerms: NewCombinedParamPerms(pathParamPerms...),
queryParamPerms: NewCombinedParamPerms(queryParamPerms...),
headerParamPerms: NewCombinedParamPerms(headerParamPerms...),
}
}
type requestMetricTagsFunc func() metrics.Tags
func (f requestMetricTagsFunc) perms() RouteParamPerms {
return nil
}
func (f requestMetricTagsFunc) metricTags() metrics.Tags {
return f()
}
func MetricTags(tags metrics.Tags) RouteParam {
return requestMetricTagsFunc(func() metrics.Tags {
return tags
})
}
func toMetricTags(params []RouteParam) metrics.Tags {
var tags metrics.Tags
for _, param := range params {
tags = append(tags, param.metricTags()...)
}
return tags
}