Python Scrapy 框架发布错误图像 - 为什么/如何解决这个问题？

Question

我正在使用 Python 的 Scrapy 框架从一个网站抓取多个条目，包括文本和图像，并将它们一一发布到另一个网站。一切正常，只是发布的图像与错误的对应文本不同。我一生都无法弄清楚该采取什么不同的做法。

这是代码，如果有人能帮我解决这个问题，我将不胜感激：

from flexmls.items import FlexmlsItem

class Epropertysites(BaseSpider):

name = 'epropertysites'

start_urls = ['http://www.epropertysites.com/']
URL  = 'http://www.epropertysites.com'

def parse(self, response):
    return FormRequest.from_response(response,
                                     formdata={'i_login':settings.get('EPROP_USER', u''),
                                               'i_password':settings.get('EPROP_PASSW', u'')},
                                               callback=self.after_login)

def after_login(self, response):
    if 'is incorrect' in response.body:
        print 'Failed to login with\r\n press enter'
        self.log('Login failes', log.ERROR)
        raw_input()
        return
    for row in csv.DictReader(open(os.path.join("results", 'flexmls.csv'))):
        yield Request('http://www.epropertysites.com/myprop_add.htm',
                      meta={'item':row},
                      dont_filter=True,
                   callback=self.post_ad)

def post_ad(self, response):
    item = response.request.meta['item']
    try:
        print 'posting', item['address'].encode()
    except:pass
    formdata={'i_address':item['address'],
        'i_city':item['city'],
        'i_price':item['price'] if item['price'] else u'0',
        'i_state':item['state'].strip(),
        'i_zip':item['zip'].strip(),
        'i_county':item['county'],
       'i_mls':item['id'].strip(),
        'i_type':'1',
        'i_br':item['beds'] if item['beds'] else u'1',
        'i_ba':item['baths'] if item['baths'] else u'1',
        'i_sqft':item['sqft'],
        'i_year_blt':item['year_built'],
        'i_tagline':item['address'],
        'i_desc':item['description'].replace("\n", '\r\n'),
        'i_site_key':item['address'].replace(u" ", u'-').replace(u".", u'').strip(),
        'i_domain':'ePropertySites.com',
        'i_layout':'%.2d' %random.randint(2,5),
        'i_color02':'%.2d' %random.randint(1,12)
        }

    return FormRequest('http://www.epropertysites.com/myprop_add.htm?&f=3',
                       formdata=formdata,
                              meta={'item':item, 'form':formdata},
                       callback=self.post_images)


def encode_multipart_formdata(self, fields, files):

    BOUNDARY = '----------ThIs_Is_tHe_bouNdaRY_$'
    CRLF = '\r\n'
    L = []
    for (key, value) in fields:
        L.append('--' + BOUNDARY)
        L.append('Content-Disposition: form-data; name="%s"' % key)
        L.append('')
        L.append(value)
    for (filename, value) in files:
        L.append('--' + BOUNDARY)
        L.append('Content-Disposition: form-data; name="%s"; filename="%s"' % (filename, filename))
        L.append('Content-Type: image/jpeg')
        L.append('')
        L.append(value)
    L.append('--' + BOUNDARY + '--')
    L.append('')
    body = CRLF.join(L)
    content_type = 'multipart/form-data; boundary=%s' % BOUNDARY
    return content_type, body

def post_images(self, response):
    if 'That Website Key is already being used' in response.body:return
    page = HtmlXPathSelector(response)

    item = response.request.meta['item']
    images = eval(item['images'])
    fields = [('i_caption_1',''), ('v_max','1'),
              ('Content-Disposition: form-data; name="mode"','send')]
    files = [ ( os.path.basename(image),
               open(os.path.join(settings.get("IMAGES_STORE"), image)).read())
             for image in images]
    content_type, body = self.encode_multipart_formdata(fields, files)
    return FormRequest(self.URL + page.select("//form/@action").extract()[0],
                           body=body,
                           method='POST',
                           headers={'Content-Type':content_type,
                                    'content-length':len(body)},
                           meta={"item":item, 'form':response.request.meta['form']},
                           callback=self.get_change_page)

def get_change_page(self, response):
    page = HtmlXPathSelector(response)
    ad_id = page.select("//form/@action").re(r"&key=(\d+)&")[0].strip()
    return Request("http://www.epropertysites.com/myproperties.htm?&f=mod&key=%s" %ad_id,
                   meta={'item':response.request.meta['item'],
                         'form':response.request.meta['form'],
                         'id':ad_id},
                   callback=self.post_rest_info)