mirror of
https://github.com/ProtonMail/proton-bridge.git
synced 2025-12-10 12:46:46 +00:00
84 lines
2.4 KiB
Go
84 lines
2.4 KiB
Go
// Copyright (c) 2020 Proton Technologies AG
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//
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// This file is part of ProtonMail Bridge.
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//
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// ProtonMail Bridge 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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// ProtonMail Bridge 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 ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package rfc5322
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import (
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"net/mail"
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"time"
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"github.com/ProtonMail/proton-bridge/pkg/message/rfc5322/parser"
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"github.com/antlr/antlr4/runtime/Go/antlr"
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"github.com/sirupsen/logrus"
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)
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// ParseAddressList parses one or more valid RFC5322 (with RFC2047) addresses.
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func ParseAddressList(input string) ([]*mail.Address, error) {
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if len(input) == 0 {
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return []*mail.Address{}, nil
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}
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l := parser.NewRFC5322Lexer(antlr.NewInputStream(input))
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p := parser.NewRFC5322Parser(antlr.NewCommonTokenStream(l, antlr.TokenDefaultChannel))
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w := &walker{}
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p.AddErrorListener(w)
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p.AddParseListener(&parseListener{rules: p.GetRuleNames()})
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antlr.ParseTreeWalkerDefault.Walk(w, p.AddressList())
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return w.res.([]*mail.Address), w.err
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}
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// ParseDateTime parses a valid RFC5322 date-time.
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func ParseDateTime(input string) (time.Time, error) {
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if len(input) == 0 {
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return time.Time{}, nil
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}
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l := parser.NewRFC5322Lexer(antlr.NewInputStream(input))
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p := parser.NewRFC5322Parser(antlr.NewCommonTokenStream(l, antlr.TokenDefaultChannel))
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w := &walker{}
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p.AddErrorListener(w)
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p.AddParseListener(&parseListener{rules: p.GetRuleNames()})
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antlr.ParseTreeWalkerDefault.Walk(w, p.DateTime())
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return w.res.(time.Time), w.err
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}
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type parseListener struct {
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antlr.BaseParseTreeListener
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rules []string
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}
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func (l *parseListener) EnterEveryRule(ctx antlr.ParserRuleContext) {
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logrus.
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WithField("rule", l.rules[ctx.GetRuleIndex()]).
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WithField("text", ctx.GetText()).
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Trace("Entering rule")
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}
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func (l *parseListener) ExitEveryRule(ctx antlr.ParserRuleContext) {
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logrus.
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WithField("rule", l.rules[ctx.GetRuleIndex()]).
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WithField("text", ctx.GetText()).
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Trace("Exiting rule")
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}
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