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main.go
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main.go
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// Copyright (c) 2017 Yamagishi Kazutoshi <ykzts@desire.sh>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package main // import "manael.org/x/manael/cmd/manael"
import (
"flag"
"fmt"
"log"
"net/http"
"os"
"github.com/gorilla/handlers"
"manael.org/x/manael"
)
const (
// DefaultPort is returned by default port.
DefaultPort = 8080
// DefaultUpstreamURL is returned by default upstream URL.
DefaultUpstreamURL = "http://localhost:9000"
)
type config struct {
httpAddr string
upstreamURL string
}
func main() {
fs := flag.NewFlagSet(os.Args[0], flag.ExitOnError)
conf := config{}
fs.StringVar(&conf.httpAddr, "http", "", "HTTP server address")
fs.StringVar(&conf.upstreamURL, "upstream_url", "", "Upstream URL for processing images")
if err := fs.Parse(os.Args[1:]); err != nil {
log.Fatalf("Error: %v", err)
}
if conf.httpAddr == "" {
port := os.Getenv("PORT")
if port != "" {
conf.httpAddr = fmt.Sprintf(":%s", port)
} else {
conf.httpAddr = fmt.Sprintf(":%d", DefaultPort)
}
}
if conf.upstreamURL == "" {
u := os.Getenv("MANAEL_UPSTREAM_URL")
if u != "" {
conf.upstreamURL = u
} else {
conf.upstreamURL = DefaultUpstreamURL
}
}
var handler http.Handler
handler = manael.NewServeProxy(conf.upstreamURL)
handler = handlers.CombinedLoggingHandler(os.Stdout, handler)
err := http.ListenAndServe(conf.httpAddr, handler)
if err != nil {
log.Fatal(err)
}
}