nowhere near usable but setting aside for rainy day
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10
const.go
10
const.go
@ -1,6 +1,14 @@
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package conf
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package main
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import (
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"regexp"
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)
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const (
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XSIVal = "http://www.w3.org/2001/XMLSchema-instance"
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DefSchemaNS = "xsi"
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)
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var (
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uriRe = regexp.MustCompile(`^(?P<type>file|https?)://(?P<path>.+)$`)
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)
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128
func_nsxml.go
Normal file
128
func_nsxml.go
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@ -0,0 +1,128 @@
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package main
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import (
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"io/ioutil"
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"net/http"
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"strings"
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lxml "github.com/lestrrat-go/libxml2"
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lxmlp "github.com/lestrrat-go/libxml2/parser"
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lxmlt "github.com/lestrrat-go/libxml2/types"
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"github.com/lestrrat-go/libxml2/xsd"
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rpaths "r00t2.io/sysutils/paths"
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)
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func NewNsXml(raw *[]byte) (x *NsXml, err error) {
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var xml NsXml
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xml.Raw = raw
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x = &xml
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return
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}
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func (x *NsXml) Validate(defaults bool) (bool, error) {
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// We need the XSD before we can validate.
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if err := x.getXSD(); err != nil {
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return false, err
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}
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return false, nil
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}
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func (x *NsXml) getXSD() error {
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if err := x.mapNS(); err != nil {
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return err
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}
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r := uriRe.FindStringSubmatch(strings.ToLower(x.XSD.XSDPath))
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reResults := make(map[string]string)
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for i, name := range uriRe.SubexpNames() {
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if i != 0 && name != "" {
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reResults[name] = r[i]
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}
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}
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var xsdRaw []byte
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switch reResults["type"] {
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case "file":
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p := reResults["path"]
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exists, err := rpaths.RealPathExists(&p)
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if (err != nil) || (!exists) {
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return err
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}
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xsdRaw, err = ioutil.ReadFile(p)
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if err != nil {
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return err
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}
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case "http", "https":
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resp, err := http.Get(x.XSD.XSDPath)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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xsdRaw, err = ioutil.ReadAll(resp.Body)
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if err != nil {
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return err
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}
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default:
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return errors.New("invalid URI type for schemaLocation")
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}
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x.XSD, err = xsd.Parse(xsdRaw)
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if err != nil {
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return err
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}
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}
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// mapNS (tries to) extract the default namespace from the document via the SchemaLocation property of XML, sets DefaultNS,
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// and then gets the XSDPath specified therein.
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func (x *NsXml) mapNS() error {
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if x.XSD.Pointer() != 0 {
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// Already set.
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return nil
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}
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if err := x.parse(); err != nil {
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return err
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}
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x.DefaultNS = x.Root.NamespaceURI()
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/* x.DefaultNS = *x.XML.XMLName.Space
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sl := *x.XML.SchemaLocation
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*/
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ns := strings.Fields(sl)
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if ns != nil {
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if len(ns) > 2 {
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return errors.New("too many values for a valid schemaLocation")
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} else if len(ns) == 0 {
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return errors.New("no specified value for schemaLocation")
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} else if len(ns) == 1 {
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// LAZY. This is improper XML, but is commonly used regardless.
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x.XSDPath = ns[0]
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} else {
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if ns[0] == x.DefaultNS {
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x.XSDPath = ns[1]
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}
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}
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}
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return nil
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}
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// parse parses the x.XML into its x.LXML
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func (x *NsXml) parse() error {
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if x.LXML != nil {
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return nil // Already parsed
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}
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if x.XML == nil {
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return errors.New("XML property is empty")
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}
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x.LXML, err = lxml.Parse(*x.XML, lxmlp.XMLParseBigLines, lxmlp.XMLParseXInclude)
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if err != nil {
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return err
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}
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de, err := x.LXML.DocumentElement()
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if err != nil {
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return err
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}
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x.Root = de.(lxmlt.Element)
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return nil
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}
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134
schema.go
134
schema.go
@ -1,131 +1,17 @@
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package conf
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package main
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// The usage of this depends on the successful resolution of https://github.com/lestrrat-go/libxml2/issues/67.
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import (
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`errors`
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`io/ioutil`
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`net/http`
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`regexp`
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`strings`
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"errors"
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"io/ioutil"
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"net/http"
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"strings"
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lxml `github.com/lestrrat-go/libxml2`
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lxmlp `github.com/lestrrat-go/libxml2/parser`
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lxmlt `github.com/lestrrat-go/libxml2/types`
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`github.com/lestrrat-go/libxml2/xsd`
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lxml "github.com/lestrrat-go/libxml2"
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lxmlp "github.com/lestrrat-go/libxml2/parser"
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lxmlt "github.com/lestrrat-go/libxml2/types"
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"github.com/lestrrat-go/libxml2/xsd"
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rpaths `r00t2.io/sysutils/paths`
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rpaths "r00t2.io/sysutils/paths"
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)
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var uriRe = regexp.MustCompile(`^(?P<type>file|https?)://(?P<path>.+)$`)
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type NSXML struct {
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XML *[]byte // The raw XML bytes.
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LXML lxmlt.Document // The lxml.Parse()'d XML.
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Root lxmlt.Element // The Document's root element
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XSD xsd.Schema // Its schema.
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}
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func (x *NSXML) Validate(defaults bool) (bool, error) {
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// We need the XSD before we can validate.
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if err := x.getXSD(); err != nil {
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return false, err
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}
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return false, nil
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}
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func (x *NSXML) getXSD() error {
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if err := x.mapNS(); err != nil {
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return err
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}
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r := uriRe.FindStringSubmatch(strings.ToLower(x.XSDPath))
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reResults := make(map[string]string)
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for i, name := range uriRe.SubexpNames() {
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if i != 0 && name != "" {
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reResults[name] = r[i]
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}
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}
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var xsdRaw []byte
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switch reResults["type"] {
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case "file":
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p := reResults["path"]
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exists, err := rpaths.RealPathExists(&p)
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if (err != nil) || (!exists) {
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return err
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}
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xsdRaw, err = ioutil.ReadFile(p)
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if err != nil {
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return err
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}
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case "http", "https":
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resp, err := http.Get(x.XSDPath)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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xsdRaw, err = ioutil.ReadAll(resp.Body)
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if err != nil {
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return err
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}
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default:
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return errors.New("invalid URI type for schemaLocation")
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}
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x.XSD, err = xsd.Parse(xsdRaw)
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if err != nil {
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return err
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}
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}
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// mapNS (tries to) extract the default namespace from the document via the SchemaLocation property of XML, sets DefaultNS,
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// and then gets the XSDPath specified therein.
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func (x *NSXML) mapNS() error {
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if x.XSD.Pointer() != 0 {
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// Already set.
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return nil
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}
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if err := x.parse(); err != nil {
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return err
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}
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x.DefaultNS = x.Root.NamespaceURI()
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/* x.DefaultNS = *x.XML.XMLName.Space
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sl := *x.XML.SchemaLocation
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*/
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ns := strings.Fields(sl)
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if ns != nil {
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if len(ns) > 2 {
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return errors.New("too many values for a valid schemaLocation")
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} else if len(ns) == 0 {
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return errors.New("no specified value for schemaLocation")
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} else if len(ns) == 1 {
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// LAZY. This is improper XML, but is commonly used regardless.
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x.XSDPath = ns[0]
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} else {
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if ns[0] == x.DefaultNS {
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x.XSDPath = ns[1]
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}
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}
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}
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return nil
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}
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// parse parses the x.XML into its x.LXML
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func (x *NSXML) parse() error {
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if x.LXML != nil {
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return nil // Already parsed
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}
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if x.XML == nil {
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return errors.New("XML property is empty")
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}
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x.LXML, err = lxml.Parse(*x.XML, lxmlp.XMLParseBigLines, lxmlp.XMLParseXInclude)
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if err != nil {
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return err
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}
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de, err := x.LXML.DocumentElement()
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if err != nil {
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return err
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}
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x.Root = de.(lxmlt.Element)
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return nil
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}
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28
types.go
Normal file
28
types.go
Normal file
@ -0,0 +1,28 @@
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package main
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import (
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lxmlt "github.com/lestrrat-go/libxml2/types"
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"github.com/lestrrat-go/libxml2/xsd"
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)
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// NsXml is a namespaced XML document.
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type NsXml struct {
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// Raw is the raw bytes of the document.
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Raw *[]byte
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// XML is the libxml2-parsed document.
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XML lxmlt.Document
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// Root is LXML's root element.
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Root lxmlt.Element
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// XSD is LXML's schema (NsXsd).
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XSD *NsXsd
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}
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// NsXsd is a namespaced XSD (XML Schema Definition).
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type NsXsd struct {
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// Raw is the raw bytes of the document.
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Raw *[]byte
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// XSD is the libxml2-parsed schema.
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XSD xsd.Schema
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// XSDPath is the path of the XSD in a fetchable form (the URI of the document, essentially).
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XSDPath string
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}
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