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issue2551142 - Import ... unique constraint failure. Full title: Import of retired node with username after active node fails with unique constraint failure. Fix this in two ways: 1) sort export on keyname, retired status so that retired nodes for a given keyname are before the acive node in the export file. This stops generating a broken export. 2) handle importing a broken export by deactivating/fixing up/clearing the active record's unique index entry temporarily. Redo the import of the retired node and resetting the active record to active. The fixup changes the unique index (keyvalue, __retired__) from (keyvalue, 0) to (keyvalue, -1). Then it retries the failed import of a retired record with keyvalue. I use -1 in case something goes wrong, It makes the record stand out in the database allowing hand recovery if needed. Rather than using -1 I could just use the id of the record like a normal retirement does. If the retry of the import fails (raises exception), reset the active record from -1 back to 0 and raise the exception. If it succeeds, reset the active record from -1 back to 0 and continue the import process. Reset __retired__ from -1 to 0 on every import. I don't think the performance loss from resetting on every exception matters as there should be very few exceptions. Also this makes the code more understandable. There is no reason to leave the -1 value in place and do a bulk rest of -1 to 0 after the class csv file is loaded. Also if a fixup is needed it is logged at level info with the rest of the database logging. Also success of the fixup is logged. Fixup failure generates a propagated exception.
author John Rouillard <rouilj@ieee.org>
date Mon, 07 Jun 2021 09:58:39 -0400
parents f8893e1cde0d
children
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#
# Copyright (c) 2001 Bizar Software Pty Ltd (http://www.bizarsoftware.com.au/)
# This module is free software, and you may redistribute it and/or modify
# under the same terms as Python, so long as this copyright message and
# disclaimer are retained in their original form.
#
# IN NO EVENT SHALL BIZAR SOFTWARE PTY LTD BE LIABLE TO ANY PARTY FOR
# DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING
# OUT OF THE USE OF THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# BIZAR SOFTWARE PTY LTD SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
# BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE.  THE CODE PROVIDED HEREUNDER IS ON AN "AS IS"
# BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

import email
import unittest
from roundup.anypy.strings import StringIO

from roundup.mailgw import RoundupMessage

def gen_message(spec):
    """Create a basic MIME message according to 'spec'.

    Each line of a spec has one content-type, which is optionally indented.
    The indentation signifies how deep in the MIME hierarchy the
    content-type is.

    """

    def getIndent(line):
        """Get the current line's indentation, using four-space indents."""
        count = 0
        for char in line:
            if char != ' ':
                break
            count += 1
        return count // 4

    # A note on message/rfc822: The content of such an attachment is an
    # email with at least one header line. RFC2046 tells us: """   A
    # media type of "message/rfc822" indicates that the body contains an
    # encapsulated message, with the syntax of an RFC 822 message.
    # However, unlike top-level RFC 822 messages, the restriction that
    # each "message/rfc822" body must include a "From", "Date", and at
    # least one destination header is removed and replaced with the
    # requirement that at least one of "From", "Subject", or "Date" must
    # be present."""
    # This means we have to add a newline after the mime-header before
    # the subject, otherwise the subject is part of the mime header not
    # part of the email header.
    table = {'multipart/signed': '    boundary="boundary-%(indent)s";\n',
             'multipart/mixed': '    boundary="boundary-%(indent)s";\n',
             'multipart/alternative': '    boundary="boundary-%(indent)s";\n',
             'text/plain': '    name="foo.txt"\nfoo\n',
             'text/html': '    name="bar.html"\n<html><body>bar &gt;</body></html>\n',
             'application/pgp-signature': '    name="foo.gpg"\nfoo\n',
             'application/pdf': '    name="foo.pdf"\nfoo\n',
             'message/rfc822': '\nSubject: foo\n\nfoo\n'}

    parts = []
    for line in spec.splitlines():
        content_type = line.strip()
        if not content_type:
            continue

        indent = getIndent(line)
        if indent:
            parts.append('\n--boundary-%s\n' % indent)
        parts.append('Content-type: %s;\n' % content_type)
        parts.append(table[content_type] % {'indent': indent + 1})

    for i in range(indent, 0, -1):
        parts.append('\n--boundary-%s--\n' % i)

    return email.message_from_file(StringIO(''.join(parts)), RoundupMessage)

class MultipartTestCase(unittest.TestCase):
    def setUp(self):
        self.fp = StringIO()
        w = self.fp.write
        w('Content-Type: multipart/mixed; boundary="foo"\r\n\r\n')
        w('This is a multipart message. Ignore this bit.\r\n')
        w('\r\n--foo\r\n')

        w('Content-Type: text/plain\r\n\r\n')
        w('Hello, world!\r\n')
        w('\r\n')
        w('Blah blah\r\n')
        w('foo\r\n')
        w('-foo\r\n')
        w('\r\n--foo\r\n')

        w('Content-Type: multipart/alternative; boundary="bar"\r\n\r\n')
        w('This is a multipart message. Ignore this bit.\r\n')
        w('\r\n--bar\r\n')

        w('Content-Type: text/plain\r\n\r\n')
        w('Hello, world!\r\n')
        w('\r\n')
        w('Blah blah\r\n')
        w('\r\n--bar\r\n')

        w('Content-Type: text/html\r\n\r\n')
        w('<b>Hello, world!</b>\r\n')
        w('\r\n--bar--\r\n')
        w('\r\n--foo\r\n')

        w('Content-Type: text/plain\r\n\r\n')
        w('Last bit\n')
        w('\r\n--foo--\r\n')
        self.fp.seek(0)

    def testMultipart(self):
        m = email.message_from_file(self.fp, RoundupMessage)
        self.assertTrue(m is not None)

        it = iter(m.get_payload())

        # first text/plain
        p = next(it, None)
        self.assertTrue(p is not None)
        self.assertEqual(p.get_content_type(), 'text/plain')
        self.assertEqual(p.get_payload(),
            'Hello, world!\r\n\r\nBlah blah\r\nfoo\r\n-foo\r\n')

        # sub-multipart
        p = next(it, None)
        self.assertTrue(p is not None)
        self.assertEqual(p.get_content_type(), 'multipart/alternative')

        # sub-multipart text/plain
        qit = iter(p.get_payload())
        q = next(qit, None)
        self.assertTrue(q is not None)
        self.assertEqual(q.get_content_type(), 'text/plain')
        self.assertEqual(q.get_payload(), 'Hello, world!\r\n\r\nBlah blah\r\n')

        # sub-multipart text/html
        q = next(qit, None)
        self.assertTrue(q is not None)
        self.assertEqual(q.get_content_type(), 'text/html')
        self.assertEqual(q.get_payload(), '<b>Hello, world!</b>\r\n')

        # sub-multipart end
        q = next(qit, None)
        self.assertTrue(q is None)

        # final text/plain
        p = next(it, None)
        self.assertTrue(p is not None)
        self.assertEqual(p.get_content_type(), 'text/plain')
        self.assertEqual(p.get_payload(),
            'Last bit\n')

        # end
        p = next(it, None)
        self.assertTrue(p is None)

    def TestExtraction(self, spec, expected, convert_html_with=False):
        if convert_html_with:
            from roundup.dehtml import dehtml
            html2text=dehtml(convert_html_with).html2text
        else:
            html2text=None

        self.assertEqual(gen_message(spec).extract_content(
            html2text=html2text), expected)

    def testTextPlain(self):
        self.TestExtraction('text/plain', ('foo\n', [], False))

    def testAttachedTextPlain(self):
        self.TestExtraction("""
multipart/mixed
    text/plain
    text/plain""",
                  ('foo\n',
                   [('foo.txt', 'text/plain', 'foo\n')], False))

    def testMultipartMixed(self):
        self.TestExtraction("""
multipart/mixed
    text/plain
    application/pdf""",
                  ('foo\n',
                   [('foo.pdf', 'application/pdf', b'foo\n')], False))

    def testMultipartMixedHtml(self):
        # test with html conversion enabled
        self.TestExtraction("""
multipart/mixed
    text/html
    application/pdf""",
                  ('bar >\n',
                   [('bar.html', 'text/html',
                      '<html><body>bar &gt;</body></html>\n'),
                   ('foo.pdf', 'application/pdf', b'foo\n')], False),
                            convert_html_with='dehtml')

        # test with html conversion disabled
        self.TestExtraction("""
multipart/mixed
    text/html
    application/pdf""",
                  (None,
                   [('bar.html', 'text/html',
                      '<html><body>bar &gt;</body></html>\n'),
                    ('foo.pdf', 'application/pdf', b'foo\n')], False),
                            convert_html_with=False)

    def testMultipartAlternative(self):
        self.TestExtraction("""
multipart/alternative
    text/plain
    application/pdf
        """, ('foo\n', [('foo.pdf', 'application/pdf', b'foo\n')], False))

    def testMultipartAlternativeHtml(self):
        self.TestExtraction("""
multipart/alternative
    text/html
    application/pdf""",
                  ('bar >\n',
                   [('bar.html', 'text/html',
                      '<html><body>bar &gt;</body></html>\n'),
                   ('foo.pdf', 'application/pdf', b'foo\n')], False),
                            convert_html_with='dehtml')

        self.TestExtraction("""
multipart/alternative
    text/html
    application/pdf""",
                  (None,
                   [('bar.html', 'text/html',
                      '<html><body>bar &gt;</body></html>\n'),
                    ('foo.pdf', 'application/pdf', b'foo\n')], False),
                            convert_html_with=False)

    def testMultipartAlternativeHtmlText(self):
        # text should take priority over html when html is first
        self.TestExtraction("""
multipart/alternative
    text/html
    text/plain
    application/pdf""",
                  ('foo\n',
                   [('bar.html', 'text/html',
                      '<html><body>bar &gt;</body></html>\n'),
                    ('foo.pdf', 'application/pdf', b'foo\n')], False),
                            convert_html_with='dehtml')

        # text should take priority over html when text is first
        self.TestExtraction("""
multipart/alternative
    text/plain
    text/html
    application/pdf""",
                  ('foo\n',
                   [('bar.html', 'text/html',
                      '<html><body>bar &gt;</body></html>\n'),
                    ('foo.pdf', 'application/pdf', b'foo\n')], False),
                            convert_html_with='dehtml')

        # text should take priority over html when text is second and
        # html is disabled
        self.TestExtraction("""
multipart/alternative
    text/html
    text/plain
    application/pdf""",
                  ('foo\n',
                   [('bar.html', 'text/html',
                      '<html><body>bar &gt;</body></html>\n'),
                    ('foo.pdf', 'application/pdf', b'foo\n')], False),
                            convert_html_with=False)

        # text should take priority over html when text is first and
        # html is disabled
        self.TestExtraction("""
multipart/alternative
    text/plain
    text/html
    application/pdf""",
                  ('foo\n',
                   [('bar.html', 'text/html',
                      '<html><body>bar &gt;</body></html>\n'),
                    ('foo.pdf', 'application/pdf', b'foo\n')], False),
                            convert_html_with=False)

    def testDeepMultipartAlternative(self):
        self.TestExtraction("""
multipart/mixed
    multipart/alternative
        text/plain
        application/pdf
        """, ('foo\n', [('foo.pdf', 'application/pdf', b'foo\n')], False))

    def testSignedText(self):
        self.TestExtraction("""
multipart/signed
    text/plain
    application/pgp-signature""", ('foo\n', [], False))

    def testSignedAttachments(self):
        self.TestExtraction("""
multipart/signed
    multipart/mixed
        text/plain
        application/pdf
    application/pgp-signature""",
                  ('foo\n',
                   [('foo.pdf', 'application/pdf', b'foo\n')], False))

    def testAttachedSignature(self):
        self.TestExtraction("""
multipart/mixed
    text/plain
    application/pgp-signature""",
                  ('foo\n',
                   [('foo.gpg', 'application/pgp-signature', b'foo\n')], False))

    def testMessageRfc822(self):
        self.TestExtraction("""
multipart/mixed
    message/rfc822""",
                  (None,
                   [('foo.eml', 'message/rfc822', 'Subject: foo\n\nfoo\n')], False))

# vim: set filetype=python ts=4 sw=4 et si
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