Mercurial > gemma
view pkg/soap/validate.go @ 3533:8e083b271fca
Improve error messages if no matching gauge version found
Avoid hitting the NOT NULL constraint of the referencing validity
column in order to hit the foreign key constraint instead and emit
an appropriate error message in all such cases.
author | Tom Gottfried <tom@intevation.de> |
---|---|
date | Wed, 29 May 2019 18:14:20 +0200 |
parents | bd09d6ad4c14 |
children | 31973f6f5cca |
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// This is Free Software under GNU Affero General Public License v >= 3.0 // without warranty, see README.md and license for details. // // SPDX-License-Identifier: AGPL-3.0-or-later // License-Filename: LICENSES/AGPL-3.0.txt // // Copyright (C) 2018 by via donau // – Österreichische Wasserstraßen-Gesellschaft mbH // Software engineering by Intevation GmbH // // Author(s): // * Sascha L. Teichmann <sascha.teichmann@intevation.de> package soap import ( "bytes" "encoding/xml" "fmt" "io" "io/ioutil" "os" "os/exec" "path/filepath" "strings" "golang.org/x/net/html/charset" "gemma.intevation.de/gemma/pkg/config" ) const linter = "xmllint" type ( ValidationError string foundError string ) func (ef foundError) Error() string { return string(ef) } func (ve ValidationError) Error() string { return string(ve) } func FindSchema(name string) (string, error) { name = strings.ToLower(name) config.WaitReady() for _, root := range filepath.SplitList(config.SchemaDirs()) { err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error { if err != nil { return err } if info == nil { return nil } if info.Mode().IsRegular() && strings.ToLower(info.Name()) == name { return foundError(path) } return nil }) if path, ok := err.(foundError); ok { return string(path), nil } if err != nil { return "", err } } return "", nil } func ValidateFile(fname, schema string, dst interface{}) error { f, err := os.Open(fname) if err != nil { return err } defer f.Close() return Validate(f, schema, dst) } func Validate(r io.Reader, schema string, dst interface{}) error { schemaPath, err := FindSchema(schema) if err != nil { return err } if schemaPath == "" { return fmt.Errorf("no schema file '%s' found", schema) } linterPath, err := exec.LookPath(linter) if err != nil { return err } type envelope struct { _ xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Envelope"` Body *struct { Inner []byte `xml:",innerxml"` } `xml:"http://schemas.xmlsoap.org/soap/envelope/ Body"` } content, err := ioutil.ReadAll(r) if err != nil { return err } dec := xml.NewDecoder(bytes.NewReader(content)) dec.CharsetReader = charset.NewReaderLabel var env envelope if err := dec.Decode(&env); err != nil { return err } // It has a body -> throw envelope away. if env.Body != nil && len(env.Body.Inner) > 0 { content = env.Body.Inner } cmd := exec.Command( linterPath, "--schema", schemaPath, "--noout", "-") var stderr bytes.Buffer cmd.Stdin = bytes.NewReader(content) cmd.Stderr = &stderr cmd.Stdout = ioutil.Discard if err := cmd.Start(); err != nil { return err } if err := cmd.Wait(); err != nil { if err2, ok := err.(*exec.ExitError); ok { if !err2.Success() { return ValidationError(stderr.String()) } } return err } // Validation successful -> Deserialize. dec = xml.NewDecoder(bytes.NewReader(content)) dec.CharsetReader = charset.NewReaderLabel return dec.Decode(dst) }