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https://github.com/cgrates/cgrates.git
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110 lines
3.0 KiB
Go
110 lines
3.0 KiB
Go
/*
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Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
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Copyright (C) ITsysCOM GmbH
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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package loaders
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import (
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"encoding/csv"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"os"
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"path"
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"strings"
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"github.com/cgrates/cgrates/config"
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"github.com/cgrates/cgrates/engine"
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"github.com/cgrates/cgrates/utils"
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)
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type CSVReader interface {
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Path() string
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Read() ([]string, error)
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Close() error
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}
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func NewCSVReader(csvType, dPath, fn string, sep rune, nrFlds int) (CSVReader, error) {
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switch csvType {
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case utils.MetaFileCSV:
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return NewFileCSV(path.Join(dPath, fn), sep, nrFlds)
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case utils.MetaUrl:
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return NewURLCSV(strings.TrimSuffix(dPath, utils.Slash)+utils.Slash+fn, sep, nrFlds)
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case utils.MetaGoogleAPI: // TODO: Implement *gapi
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return nil, nil
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case utils.MetaString:
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return NewStringCSV(fn, sep, nrFlds), nil
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default:
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return nil, fmt.Errorf("unsupported CSVReader type: <%q>", csvType)
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}
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}
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func NewCSVFile(rdr io.ReadCloser, path string, sep rune, nrFlds int) CSVReader {
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csvRrdr := csv.NewReader(rdr)
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csvRrdr.Comma = sep
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csvRrdr.Comment = utils.CommentChar
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csvRrdr.FieldsPerRecord = nrFlds
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csvRrdr.TrailingComma = true
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return &CSVFile{
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path: path,
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cls: rdr,
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csvRdr: csvRrdr,
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}
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}
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func NewFileCSV(path string, sep rune, nrFlds int) (_ CSVReader, err error) {
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var file io.ReadCloser
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if file, err = os.Open(path); err != nil {
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return
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}
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return NewCSVFile(file, path, sep, nrFlds), nil
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}
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func NewStringCSV(data string, sep rune, nrFlds int) (_ CSVReader) {
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return NewCSVFile(io.NopCloser(strings.NewReader(data)), data, sep, nrFlds)
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}
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func NewURLCSV(path string, sep rune, nrFlds int) (_ CSVReader, err error) {
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if _, err = url.ParseRequestURI(path); err != nil {
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return
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}
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var req *http.Response
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if req, err = (&http.Client{
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Transport: engine.GetHTTPPstrTransport(),
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Timeout: config.CgrConfig().GeneralCfg().ReplyTimeout,
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}).Get(path); err != nil {
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err = utils.ErrPathNotReachable(path)
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return
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}
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if req.StatusCode != http.StatusOK {
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err = utils.ErrNotFound
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return
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}
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return NewCSVFile(req.Body, path, sep, nrFlds), nil
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}
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type CSVFile struct {
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path string // only for logging purposes
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cls io.Closer // keep reference so we can close it when done
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csvRdr *csv.Reader
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}
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func (c *CSVFile) Path() string { return c.path }
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func (c *CSVFile) Read() ([]string, error) { return c.csvRdr.Read() }
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func (c *CSVFile) Close() error { return c.cls.Close() }
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