mirror of https://github.com/perkeep/perkeep.git
85 lines
2.5 KiB
Go
85 lines
2.5 KiB
Go
/*
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Copyright 2014 The Camlistore Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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// Package app provides helpers for server applications interacting
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// with Camlistore.
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// See also https://camlistore.org/doc/app-environment for the related
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// variables.
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package app // import "camlistore.org/pkg/app"
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import (
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"errors"
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"fmt"
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"net/http"
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"os"
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"strings"
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"camlistore.org/pkg/auth"
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"camlistore.org/pkg/client"
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"camlistore.org/pkg/httputil"
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)
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// Auth returns the auth mode for the app to access Camlistore, as defined by
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// environment variables automatically supplied by the Camlistore server host.
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func Auth() (auth.AuthMode, error) {
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return basicAuth()
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}
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func basicAuth() (auth.AuthMode, error) {
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authString := os.Getenv("CAMLI_AUTH")
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if authString == "" {
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return nil, errors.New("CAMLI_AUTH var not set")
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}
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userpass := strings.Split(authString, ":")
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if len(userpass) != 2 {
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return nil, fmt.Errorf("invalid auth string syntax. got %q, want \"username:password\"", authString)
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}
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return auth.NewBasicAuth(userpass[0], userpass[1]), nil
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}
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// Client returns a Camlistore client as defined by environment variables
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// automatically supplied by the Camlistore server host.
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func Client() (*client.Client, error) {
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server := os.Getenv("CAMLI_API_HOST")
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if server == "" {
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return nil, errors.New("CAMLI_API_HOST var not set")
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}
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am, err := basicAuth()
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if err != nil {
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return nil, err
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}
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return client.NewFromParams(server, am), nil
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}
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// ListenAddress returns the host:[port] network address, derived from the environment,
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// that the application should listen on.
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func ListenAddress() (string, error) {
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listenAddr := os.Getenv("CAMLI_APP_LISTEN")
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if listenAddr == "" {
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return "", errors.New("CAMLI_APP_LISTEN is undefined")
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}
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return listenAddr, nil
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}
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// PathPrefix returns the app's prefix on the app handler if the request was proxied
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// through Camlistore, or "/" if the request went directly to the app.
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func PathPrefix(r *http.Request) string {
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if prefix := httputil.PathBase(r); prefix != "" {
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return prefix
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}
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return "/"
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}
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