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file_system.go
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file_system.go
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// Copyright 2019 Google LLC
//
// 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
//
// https://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.
// [START functions_concepts_filesystem]
// Package tips contains tips for writing Cloud Functions in Go.
package tips
import (
"fmt"
"io/ioutil"
"log"
"net/http"
"github.com/GoogleCloudPlatform/functions-framework-go/functions"
)
func init() {
functions.HTTP("ListFiles", ListFiles)
}
// ListFiles lists the files in the current directory.
// Uses directory "serverless_function_source_code" as defined in the Go
// Functions Framework Buildpack.
// See https://github.com/GoogleCloudPlatform/buildpacks/blob/56eaad4dfe6c7bd0ecc4a175de030d2cfab9ae1c/cmd/go/functions_framework/main.go#L38.
func ListFiles(w http.ResponseWriter, r *http.Request) {
files, err := ioutil.ReadDir("./serverless_function_source_code")
if err != nil {
http.Error(w, "Unable to read files", http.StatusInternalServerError)
log.Printf("ioutil.ListFiles: %v", err)
return
}
fmt.Fprintln(w, "Files:")
for _, f := range files {
fmt.Fprintf(w, "\t%v\n", f.Name())
}
}
// [END functions_concepts_filesystem]