1ec2759550
This change refactors gRPC code used within the v3 API package into generic code that can be used for managing gRPC and gRPC Gateway.
69 lines
1.9 KiB
Go
69 lines
1.9 KiB
Go
// Copyright 2017 clair authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package httputil implements common HTTP functionality used throughout the Clair codebase.
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package httputil
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import (
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"net"
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"net/http"
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"strings"
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"github.com/coreos/clair/pkg/version"
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)
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// Middleware is a function used to wrap the logic of another http.Handler.
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type Middleware func(http.Handler) http.Handler
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// GetWithUserAgent performs an HTTP GET with the proper Clair User-Agent.
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func GetWithUserAgent(url string) (*http.Response, error) {
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client := &http.Client{}
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req, err := http.NewRequest("GET", url, nil)
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if err != nil {
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return nil, err
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}
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req.Header.Set("User-Agent", "Clair/"+version.Version+" (https://github.com/coreos/clair)")
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resp, err := client.Do(req)
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if err != nil {
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return nil, err
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}
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return resp, nil
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}
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// GetClientAddr returns the first value in X-Forwarded-For if it exists
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// otherwise fall back to use RemoteAddr
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func GetClientAddr(r *http.Request) string {
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addr := r.RemoteAddr
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if s := r.Header.Get("X-Forwarded-For"); s != "" {
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ips := strings.Split(s, ",")
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// assume the first one is the client address
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if len(ips) != 0 {
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// validate the ip
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if realIP := net.ParseIP(ips[0]); realIP != nil {
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addr = strings.TrimSpace(ips[0])
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}
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}
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}
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return addr
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}
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// Status2xx returns true if the response's status code is success (2xx)
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func Status2xx(resp *http.Response) bool {
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return resp.StatusCode/100 == 2
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}
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