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domain-discovery-crawler's Issues

ValueError: SMAZ can only process ASCII text

I thought this could not possibly happen, but somehow non-ascii URLs can reach SMAZ:

Traceback (most recent call last):
  File "/usr/local/lib/python3.5/site-packages/twisted/internet/task.py", line 517, in _oneWorkUnit
    result = next(self._iterator)
  File "/usr/local/lib/python3.5/site-packages/scrapy/utils/defer.py", line 63, in <genexpr>
    work = (callable(elem, *args, **named) for elem in iterable)
  File "/usr/local/lib/python3.5/site-packages/scrapy/core/scraper.py", line 183, in _process_spidermw_output
    self.crawler.engine.crawl(request=output, spider=spider)
  File "/usr/local/lib/python3.5/site-packages/scrapy/core/engine.py", line 210, in crawl
    self.schedule(request, spider)
  File "/usr/local/lib/python3.5/site-packages/scrapy/core/engine.py", line 216, in schedule
    if not self.slot.scheduler.enqueue_request(request):
  File "/usr/local/lib/python3.5/site-packages/scrapy_redis/scheduler.py", line 167, in enqueue_request
    self.queue.push(request)
  File "/dd_crawler/dd_crawler/queue.py", line 90, in push
    data = self._encode_request(request)
  File "/dd_crawler/dd_crawler/queue.py", line 392, in _encode_request
    return struct.pack('h', depth) + parent + url_compress(request.url)
  File "/dd_crawler/dd_crawler/queue.py", line 374, in url_compress
    return smaz.compress(url, compression_tree=smaz_tree).encode('latin1')
  File "/usr/local/lib/python3.5/site-packages/lib/smaz.py", line 399, in compress
    raise ValueError('SMAZ can only process ASCII text.')
ValueError: SMAZ can only process ASCII text

UnicodeDecode error when saving item

  File "/usr/local/lib/python3.5/site-packages/scrapy/utils/defer.py", line 102, in iter_errback
    yield next(it)
  File "/usr/local/lib/python3.5/site-packages/scrapy/spidermiddlewares/offsite.py", line 29, in process_spider_output
    for x in result:
  File "/dd_crawler/dd_crawler/middleware/domains.py", line 71, in process_spider_output
    for item in (result or []):
  File "/dd_crawler/dd_crawler/middleware/log.py", line 31, in process_spider_output
    for item in result:
  File "/usr/local/lib/python3.5/site-packages/scrapy/spidermiddlewares/referer.py", line 339, in <genexpr>
    return (_set_referer(r) for r in result or ())
  File "/dd_crawler/dd_crawler/middleware/dupesegments.py", line 41, in process_spider_output
    for el in result:
  File "/usr/local/lib/python3.5/site-packages/scrapy/spidermiddlewares/urllength.py", line 37, in <genexpr>
    return (r for r in result or () if _filter(r))
  File "/usr/local/lib/python3.5/site-packages/scrapy/spidermiddlewares/depth.py", line 58, in <genexpr>
    return (r for r in result or () if _filter(r))
  File "/dd_crawler/dd_crawler/spiders.py", line 39, in parse
    yield self.page_item(response)
  File "/dd_crawler/dd_crawler/spiders.py", line 159, in page_item
    item = super().page_item(response)
  File "/dd_crawler/dd_crawler/spiders.py", line 76, in page_item
    'parent': _url_hash_as_str(response.meta.get('parent')),
  File "/usr/local/lib/python3.5/site-packages/scrapy_cdr/utils.py", line 19, in text_cdr_item
    response_headers=response.headers.to_unicode_dict(),
  File "/usr/local/lib/python3.5/site-packages/scrapy/http/headers.py", line 89, in to_unicode_dict
    for key, value in self.items())
  File "/usr/local/lib/python3.5/site-packages/scrapy/utils/datatypes.py", line 193, in __init__
    self.update(seq)
  File "/usr/local/lib/python3.5/site-packages/scrapy/utils/datatypes.py", line 229, in update
    super(CaselessDict, self).update(iseq)
  File "/usr/local/lib/python3.5/site-packages/scrapy/utils/datatypes.py", line 228, in <genexpr>
    iseq = ((self.normkey(k), self.normvalue(v)) for k, v in seq)
  File "/usr/local/lib/python3.5/site-packages/scrapy/http/headers.py", line 89, in <genexpr>
    for key, value in self.items())
  File "/usr/local/lib/python3.5/site-packages/scrapy/utils/python.py", line 107, in to_unicode
    return text.decode(encoding, errors)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x94 in position 7: invalid start byte```

Move to scrapy-redis from PyPI

Right now we are using an old fork with a few commits that fixed py3 compatibility. But upstream has since fixed py3 compat, so it would be better to switch to stable and supported version.

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