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comparison pkg/wfs/global.go @ 2634:49ce3c11ca72

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WFS downloads: Started with GML based downloads based on installation of ogr2ogr.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 13 Mar 2019 18:33:03 +0100
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children d7ef169fd0d3
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2633:eb1d119f253f 2634:49ce3c11ca72
1 // This is Free Software under GNU Affero General Public License v >= 3.0
2 // without warranty, see README.md and license for details.
3 //
4 // SPDX-License-Identifier: AGPL-3.0-or-later
5 // License-Filename: LICENSES/AGPL-3.0.txt
6 //
7 // Copyright (C) 2019 by via donau
8 // – Österreichische Wasserstraßen-Gesellschaft mbH
9 // Software engineering by Intevation GmbH
10 //
11 // Author(s):
12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
13
14 package wfs
15
16 import (
17 "io"
18 "log"
19 "os/exec"
20 )
21
22 type (
23 Downloader interface {
24 Download(handler func(string, io.Reader) error) error
25 }
26
27 GeoJSONDownloader []string
28 GMLDownloader []string
29 )
30
31 var GetFeatures = setup()
32
33 func setup() func(*Capabilities, string, string) (Downloader, error) {
34 path, err := exec.LookPath("ogr2ogr")
35 if err != nil {
36 log.Println("info: ogr2ogr not installed. Using direct GeoJSON WFS download.")
37 return GetFeaturesGeoJSON
38 }
39 log.Printf("info: ogr2ogr found at %s. Using GML WFS download.\n", path)
40 return GetFeaturesGML
41 }
42
43 func GetFeaturesGeoJSON(
44 caps *Capabilities,
45 featureTypeName string,
46 sortBy string,
47 ) (Downloader, error) {
48 return nil, nil
49 }
50
51 func GetFeaturesGML(
52 caps *Capabilities,
53 featureTypeName string,
54 sortBy string,
55 ) (Downloader, error) {
56 return nil, nil
57 }
58
59 func (gjd GeoJSONDownloader) Download(handler func(string, io.Reader)) error {
60 // TODO: Implement, me!
61 return nil
62 }
63
64 func (gmd GMLDownloader) Download(handler func(string, io.Reader)) error {
65 // TODO: Implement, me!
66 return nil
67 }