Mercurial > gemma

changeset 1602:e80e35b26f17

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WFS Capabilities parser: Wrote a custom xml.Unmarshaler to extract the namespaces of FeatureTypes, too. They are needed in GetFeature requests.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 17 Dec 2018 13:01:58 +0100
parents b88cc5aadcc1
children 2ea2a14f7b25
files cmd/wfs/main.go pkg/wfs/capabilities.go
diffstat 2 files changed, 53 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/cmd/wfs/main.go	Mon Dec 17 12:31:56 2018 +0100
+++ b/cmd/wfs/main.go	Mon Dec 17 13:01:58 2018 +0100
@@ -44,7 +44,13 @@
 		fmt.Println("service identification")
 		fmt.Println("----------------------")
 		fmt.Printf("title: %s\n", caps.ServiceIdentification.Title)
-		fmt.Printf("abstract: %s\n", caps.ServiceIdentification.Abstract)
+		var abstract string
+		if len(caps.ServiceIdentification.Abstract) > 40 {
+			abstract = fmt.Sprintf("%.40s...", caps.ServiceIdentification.Abstract)
+		} else {
+			abstract = caps.ServiceIdentification.Abstract
+		}
+		fmt.Printf("abstract: %s\n", abstract)
 		if len(caps.ServiceIdentification.Keywords.Keywords) > 0 {
 			fmt.Println("keywords:")
 			for _, kw := range caps.ServiceIdentification.Keywords.Keywords {
@@ -116,6 +122,13 @@
 			for _, ft := range caps.FeatureTypeList.FeatureTypes {
 				fmt.Printf("\tname: %s\n", ft.Name)
 				fmt.Printf("\ttitle: %s\n", ft.Title)
+				var abstract string
+				if len(ft.Abstract) > 40 {
+					abstract = fmt.Sprintf("%.40s...", ft.Abstract)
+				} else {
+					abstract = ft.Abstract
+				}
+				fmt.Printf("\tabstract: %s\n", abstract)
 				fmt.Printf("\tdefault CRS: %s\n", ft.DefaultCRS)
 				if len(ft.OtherCRSs) > 0 {
 					fmt.Println("\tother CRSs:")
@@ -128,11 +141,17 @@
 						ft.WGS84BoundingBox.LowerCorner, ft.WGS84BoundingBox.UpperCorner)
 				}
 				if len(ft.Keywords.Keywords) > 0 {
-					fmt.Printf("\tkeywords:\n")
+					fmt.Println("\tkeywords:")
 					for _, kw := range ft.Keywords.Keywords {
 						fmt.Printf("\t\t%s\n", kw.Value)
 					}
 				}
+				if len(ft.Namespaces) > 0 {
+					fmt.Println("\tnamespaces:")
+					for _, ns := range ft.Namespaces {
+						fmt.Printf("\t\t%s:%s\n", ns.Space, ns.Local)
+					}
+				}
 			}
 		}
 	}
--- a/pkg/wfs/capabilities.go	Mon Dec 17 12:31:56 2018 +0100
+++ b/pkg/wfs/capabilities.go	Mon Dec 17 13:01:58 2018 +0100
@@ -111,10 +111,42 @@
 	XMLName          xml.Name          `xml:"http://www.opengis.net/wfs/2.0 FeatureType"`
 	Name             string            `xml:"Name"`
 	Title            string            `xml:"Title"`
+	Abstract         string            `xml:"Abstract"`
+	Keywords         Keywords          `xml:"Keywords"`
+	DefaultCRS       string            `xml:"DefaultCRS"`
+	OtherCRSs        []string          `xml:"OtherCRS"`
+	WGS84BoundingBox *WGS84BoundingBox `xml:"WGS84BoundingBox"`
+	Namespaces       []xml.Name        `xml:"-"`
+}
+
+// shadowFeatureType is used to prevent recursive UnmarshalXML for FeatureType.
+type shadowFeatureType struct {
+	XMLName          xml.Name          `xml:"http://www.opengis.net/wfs/2.0 FeatureType"`
+	Name             string            `xml:"Name"`
+	Title            string            `xml:"Title"`
+	Abstract         string            `xml:"Abstract"`
 	Keywords         Keywords          `xml:"Keywords"`
 	DefaultCRS       string            `xml:"DefaultCRS"`
 	OtherCRSs        []string          `xml:"OtherCRS"`
 	WGS84BoundingBox *WGS84BoundingBox `xml:"WGS84BoundingBox"`
+	Namespaces       []xml.Name        `xml:"-"`
+}
+
+func (ft *FeatureType) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	// Filter out the namespaces for this feature type.
+	var ns []xml.Name
+	for _, attr := range start.Attr {
+		if attr.Name.Space == "xmlns" {
+			ns = append(ns, xml.Name{Space: attr.Name.Local, Local: attr.Value})
+		}
+	}
+	var sft shadowFeatureType
+	if err := d.DecodeElement(&sft, &start); err != nil {
+		return err
+	}
+	*ft = FeatureType(sft)
+	ft.Namespaces = ns
+	return nil
 }
 
 type FeatureTypeList struct {