go-ipp/utils.go

/*
	Copyright 2022 Dolysis Consulting Limited

	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.

	For changes see the git log
*/
package ipp

import (
	"fmt"
	"os"
	"path"
)

// ParseControlFile reads and decodes a cups control file into a response
func ParseControlFile(jobID int, spoolDirectory string) (*Response, error) {
	if spoolDirectory == "" {
		spoolDirectory = "/var/spool/cups"
	}

	controlFilePath := path.Join(spoolDirectory, fmt.Sprintf("c%d", jobID))

	if _, err := os.Stat(controlFilePath); err != nil {
		return nil, err
	}

	controlFile, err := os.Open(controlFilePath)
	if err != nil {
		return nil, err
	}
	defer controlFile.Close()

	return NewResponseDecoder(controlFile).Decode(nil)
}