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validate.go
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validate.go
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// Copyright © 2021 The Things Network Foundation, The Things Industries B.V.
//
// 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 main
import (
"fmt"
"net/http"
"os"
"path/filepath"
"sync"
"sync/atomic"
"time"
"github.com/TheThingsNetwork/lorawan-webhook-templates/schema"
"gopkg.in/yaml.v2"
)
// numWorkers is the number of worker goroutines to spawn for template validation.
const numWorkers = 12
func validateTemplate(baseDir, templateID string) error {
templateYml := filepath.Join(baseDir, templateID+".yml")
b, err := os.ReadFile(templateYml)
if err != nil {
return err
}
template := schema.WebhookTemplate{}
if err := yaml.Unmarshal(b, &template); err != nil {
return err
}
return template.Validate()
}
func readTemplatesIndex(baseDir string) ([]string, error) {
templatesYml := filepath.Join(baseDir, "templates.yml")
b, err := os.ReadFile(templatesYml)
if err != nil {
return nil, err
}
var templateIDs []string
if err := yaml.Unmarshal(b, &templateIDs); err != nil {
return nil, err
}
if len(templateIDs) == 0 {
return nil, fmt.Errorf("no template IDs found in %s", templatesYml)
}
return templateIDs, nil
}
func init() {
http.DefaultClient.Timeout = 5 * time.Second
}
func main() {
baseDir := os.Getenv("WEBHOOK_TEMPLATES_DIR")
templateIDs, err := readTemplatesIndex(baseDir)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to retrieve templates: %v\n", err)
os.Exit(1)
}
fmt.Printf("Found %d webhook templates\n", len(templateIDs))
wg := sync.WaitGroup{}
templateCh := make(chan string)
var rc int32
for i := 0; i < numWorkers; i++ {
wg.Add(1)
go func() {
for templateID := range templateCh {
if err := validateTemplate(baseDir, templateID); err != nil {
fmt.Fprintf(os.Stderr, "Webhook template %s ERROR: %v\n", templateID, err)
atomic.StoreInt32(&rc, 1)
} else {
fmt.Printf("Webhook template %s OK\n", templateID)
}
}
wg.Done()
}()
}
go func() {
for _, templateID := range templateIDs {
templateCh <- templateID
}
close(templateCh)
}()
wg.Wait()
os.Exit(int(rc))
}