1f90de31e7
This is a first attempt to add a new function for URL parsing, using go's net/url package and the simple API. This is still a barebones implementation, there's possibility to expose more information. It also includes simple tests.
94 lines
3.4 KiB
Go
94 lines
3.4 KiB
Go
// Mgmt
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// Copyright (C) James Shubin and the project contributors
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// Written by James Shubin <james@shubin.ca> and the project contributors
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//
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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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//
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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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//
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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 <https://www.gnu.org/licenses/>.
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//
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// Additional permission under GNU GPL version 3 section 7
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//
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// If you modify this program, or any covered work, by linking or combining it
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// with embedded mcl code and modules (and that the embedded mcl code and
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// modules which link with this program, contain a copy of their source code in
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// the authoritative form) containing parts covered by the terms of any other
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// license, the licensors of this program grant you additional permission to
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// convey the resulting work. Furthermore, the licensors of this program grant
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// the original author, James Shubin, additional permission to update this
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// additional permission if he deems it necessary to achieve the goals of this
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// additional permission.
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package corenet
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import (
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"context"
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"fmt"
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"net/url"
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"github.com/purpleidea/mgmt/lang/funcs/simple"
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"github.com/purpleidea/mgmt/lang/types"
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"github.com/purpleidea/mgmt/util/errwrap"
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)
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const (
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urlParserFieldScheme = "scheme"
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urlParserFieldHost = "host"
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urlParserFieldPath = "path"
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urlParserFieldRawQuery = "raw_query"
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)
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var urlParserReturnType = fmt.Sprintf(
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"struct{%s str; %s str; %s str; %s str}",
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urlParserFieldScheme,
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urlParserFieldHost,
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urlParserFieldPath,
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urlParserFieldRawQuery,
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)
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func init() {
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simple.ModuleRegister(ModuleName, "url_parser", &simple.Scaffold{
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T: types.NewType(fmt.Sprintf("func(str) %s", urlParserReturnType)),
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F: URLParser,
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})
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}
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// URLParser takes a URL as a string, and extracts the different components of
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// the URL: scheme, host, path, and query. The function will error out if the
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// given URL doesn't contain a valid URL, as this is a requirement of the
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// underlying net/url library. Note that additional fields may be added to the
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// output in the future.
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func URLParser(ctx context.Context, input []types.Value) (types.Value, error) {
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u, err := url.Parse(input[0].Str())
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if err != nil {
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return nil, errwrap.Wrapf(err, "error parsing the URL")
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}
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if u.Scheme == "" {
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return nil, errwrap.Wrapf(err, "empty schemes are invalid")
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}
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v := types.NewStruct(types.NewType(urlParserReturnType))
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if err := v.Set(urlParserFieldScheme, &types.StrValue{V: u.Scheme}); err != nil {
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return nil, errwrap.Wrapf(err, "invalid scheme value")
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}
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if err := v.Set(urlParserFieldHost, &types.StrValue{V: u.Host}); err != nil {
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return nil, errwrap.Wrapf(err, "invalid host value")
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}
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if err := v.Set(urlParserFieldPath, &types.StrValue{V: u.Path}); err != nil {
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return nil, errwrap.Wrapf(err, "invalid path value")
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}
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if err := v.Set(urlParserFieldRawQuery, &types.StrValue{V: u.RawQuery}); err != nil {
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return nil, errwrap.Wrapf(err, "invalid query value")
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}
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return v, nil
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}
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