diff --git a/core/bookloader.py b/core/bookloader.py
index 05123280..f00d9ffb 100755
--- a/core/bookloader.py
+++ b/core/bookloader.py
@@ -14,7 +14,6 @@ import requests
 # django imports
 
 from django.conf import settings
-from django.core.files.base import ContentFile
 from django.core.files.storage import default_storage
 from django.db import IntegrityError
 from django.db.models import Sum
@@ -31,7 +30,6 @@ from gitenberg.metadata.pandata import Pandata
 
 import regluit
 import regluit.core.isbn
-from regluit.core.validation import test_file
 from regluit.marc.models import inverse_marc_rels
 from regluit.utils.lang import lang_to_language_code
 
@@ -39,6 +37,7 @@ from . import cc
 from . import models
 from .parameters import WORK_IDENTIFIERS
 from .validation import identifier_cleaner, unreverse_name
+from .models import loader
 
 logger = logging.getLogger(__name__)
 request_log = logging.getLogger("requests")
@@ -884,22 +883,6 @@ def edition_for_etype(etype, metadata, default=None):
         for key in metadata.edition_identifiers.keys():
             return edition_for_ident(key, metadata.identifiers[key])
 
-def load_ebookfile(url, etype):
-    '''
-    return a ContentFile if a new ebook has been loaded
-    '''
-    ebfs = models.EbookFile.objects.filter(source=url)
-    if ebfs:
-        return None
-    try:
-        r = requests.get(url)
-        contentfile = ContentFile(r.content)
-        test_file(contentfile, etype)
-        return contentfile
-    except IOError as e:
-        logger.error(u'could not open {}'.format(url))
-    except ValidationError as e:
-        logger.error(u'downloaded {} was not a valid {}'.format(url, etype))
 
 class BasePandataLoader(object):
     def __init__(self, url):
@@ -1016,8 +999,8 @@ class BasePandataLoader(object):
             if url:
                 edition = edition_for_etype(key, metadata, default=default_edition)
                 if edition:
-                    contentfile = load_ebookfile(url, key)
-                    if contentfile:
+                    contentfile, fmt = loader.load_ebookfile(url, key)
+                    if contentfile and fmt == key:
                         contentfile_name = '/loaded/ebook_{}.{}'.format(edition.id, key)
                         path = default_storage.save(contentfile_name, contentfile)
                         ebf = models.EbookFile.objects.create(
diff --git a/core/loaders/doab.py b/core/loaders/doab.py
index 95ab5c77..62d1e5b2 100644
--- a/core/loaders/doab.py
+++ b/core/loaders/doab.py
@@ -18,7 +18,7 @@ from oaipmh.metadata import MetadataRegistry, oai_dc_reader
 from regluit.core import bookloader, cc
 from regluit.core import models, tasks
 from regluit.core.bookloader import merge_works
-from regluit.core.loaders.utils import type_for_url
+from regluit.core.models.loader import type_for_url
 from regluit.core.validation import identifier_cleaner, valid_subject
 
 from . import scrape_language
diff --git a/core/loaders/doab_utils.py b/core/loaders/doab_utils.py
index dec0060e..a5355d83 100644
--- a/core/loaders/doab_utils.py
+++ b/core/loaders/doab_utils.py
@@ -9,7 +9,7 @@ from urllib.parse import urlparse, urljoin
 import requests
 
 from regluit.utils.lang import lang_to_language_code
-from .utils import get_soup
+from .soup import get_soup
 
 logger = logging.getLogger(__name__)
 
diff --git a/core/loaders/harvest.py b/core/loaders/harvest.py
index 9188d9c8..3d40a5b7 100644
--- a/core/loaders/harvest.py
+++ b/core/loaders/harvest.py
@@ -4,20 +4,19 @@ code for harvesting 'online' ebooks
 import logging
 import re
 import time
-from urllib.parse import urlparse, urljoin
+from urllib.parse import urljoin
 
 import requests
 
 from django.conf import settings
 from django.core.files.base import ContentFile
 
-from regluit.core.models import (
-    Ebook, EbookFile, path_for_file,
-)
+from regluit.core import models
+from regluit.core.models import loader
+from regluit.core.parameters import GOOD_PROVIDERS
 from regluit.core.pdf import staple_pdf
 
-from .utils import get_soup, type_for_url
-
+from .soup import get_soup
 
 logger = logging.getLogger(__name__)
 
@@ -40,9 +39,11 @@ class RateLimiter(object):
 
 rl = RateLimiter()
 
-def dl_online(ebook, limiter=rl.delay):
-    if ebook.format != 'online':
+def dl_online(ebook, limiter=rl.delay, format='online'):
+    if ebook.format != format or ebook.provider in DONT_HARVEST:
         return None, 0
+    if ebook.ebook_files.exists():
+        return ebook.ebook_files.first(), 0
     for do_harvest, harvester in harvesters(ebook):
         if do_harvest:
             for ebf in ebf_if_harvested(ebook.url):
@@ -63,7 +64,13 @@ CMPPROVIDERS = [
     'editorial.uniagustiniana.edu.co',
     'monographs.uc.pt',
 ]
-
+DONT_HARVEST = [
+    'Unglue.it',
+    'Github',
+    'Project Gutenberg',
+    'Google Books',
+    'OpenEdition Books',
+]
 
 def harvesters(ebook):
     yield ebook.provider in GOOD_PROVIDERS, harvest_generic
@@ -109,10 +116,10 @@ def harvesters(ebook):
 
 
 def ebf_if_harvested(url):
-    onlines = EbookFile.objects.filter(source=url)
+    onlines = models.EbookFile.objects.filter(source=url)
     if onlines:
         return onlines
-    return  EbookFile.objects.none()
+    return  models.EbookFile.objects.none()
 
 
 def make_dl_ebook(url, ebook, user_agent=settings.USER_AGENT, method='GET'):
@@ -122,75 +129,66 @@ def make_dl_ebook(url, ebook, user_agent=settings.USER_AGENT, method='GET'):
     logger.info('making %s' % url)
 
     # check to see if url already harvested
-    new_prev = []
     for ebf in ebf_if_harvested(url):
-        new_ebf = EbookFile.objects.create(
+        if ebf.ebook == ebook:
+            return ebf, 0
+        new_ebf = models.EbookFile.objects.create(
             edition=ebf.edition,
             format=ebf.format,
             file=ebf.file,
             source=ebook.url,
+            ebook=ebook,
         )
-        new_prev.append(new_ebf)
-    if new_prev:
         logger.info("Previously harvested")
-        return new_prev[0], len(new_prev)
+        return new_ebf, 0
 
-    try:
-        if method == 'POST':
-            response = requests.post(url, headers={"User-Agent": user_agent})
-        else:
-            response = requests.get(url, headers={"User-Agent": user_agent})
-    except requests.exceptions.SSLError:
-        logger.error('bad certificate? for %s', url)
-        return None, 0
-    if response.status_code == 200:
-        filesize = int(response.headers.get("Content-Length", 0))
-        filesize = filesize if filesize else None
-        logger.debug(response.headers.get('content-type', ''))
-        format = type_for_url(url, 
-                              content_type=response.headers.get('content-type', ''),
-                              disposition=response.headers.get('content-disposition', ''))
-        if format != 'online':
-            return make_harvested_ebook(response.content, ebook, format, filesize=filesize)
-        else:
-            logger.warning('download format %s for %s is not ebook', format, url)
+    
+    dl_cf, fmt = loader.load_ebookfile(url, ebook.format, user_agent=user_agent, method=method)
+    if dl_cf:
+        return make_harvested_ebook(dl_cf, ebook, fmt, filesize=dl_cf.size)
     else:
-        logger.warning('couldn\'t get %s', url)
+        logger.warning('download format %s for %s is not ebook', ebook.format, url)
     return None, 0
 
 def make_stapled_ebook(urllist, ebook, user_agent=settings.USER_AGENT, strip_covers=False):
     pdffile = staple_pdf(urllist, user_agent, strip_covers=strip_covers)
     if not pdffile:
         return None, 0
-    return make_harvested_ebook(pdffile.getvalue(), ebook, 'pdf')
+    return make_harvested_ebook(ContentFile(pdffile.getvalue()), ebook, 'pdf')
 
 def make_harvested_ebook(content, ebook, format, filesize=0):
     if not filesize:
         filesize = len(content)
-    new_ebf = EbookFile.objects.create(
+    new_ebf = models.EbookFile.objects.create(
         edition=ebook.edition,
         format=format,
         source=ebook.url,
     )
     try:
-        new_ebf.file.save(path_for_file(new_ebf, None), ContentFile(content))
+        new_ebf.file.save(models.path_for_file(new_ebf, None), content)
         new_ebf.save()
     except MemoryError:  #huge pdf files cause problems here
         logger.error("memory error saving ebook file for %s", ebook.url)
         new_ebf.delete()
         return None, 0
-
-    new_ebook = Ebook.objects.create(
-        edition=ebook.edition,
-        format=format,
-        provider='Unglue.it',
-        url=new_ebf.file.url,
-        rights=ebook.rights,
-        filesize=filesize,
-        version_label=ebook.version_label,
-        version_iter=ebook.version_iter,
-    )
-    new_ebf.ebook = new_ebook
+    if ebook.format == "online":
+        harvested_ebook = models.Ebook.objects.create(
+            edition=ebook.edition,
+            format=format,
+            provider='Unglue.it',
+            url=new_ebf.file.url,
+            rights=ebook.rights,
+            filesize=filesize if filesize < 2147483647 else 2147483647, # largest safe integer
+            version_label=ebook.version_label,
+            version_iter=ebook.version_iter,
+        )
+    else:
+        if not ebook.filesize:
+            ebook.filesize = filesize if filesize < 2147483647 else 2147483647
+            ebook.save()
+        harvested_ebook = ebook
+        
+    new_ebf.ebook = harvested_ebook
     new_ebf.save()
     return new_ebf, 1
 
diff --git a/core/loaders/soup.py b/core/loaders/soup.py
new file mode 100644
index 00000000..f30f9aa5
--- /dev/null
+++ b/core/loaders/soup.py
@@ -0,0 +1,31 @@
+import logging
+
+from bs4 import BeautifulSoup
+import requests
+
+from django.conf import settings
+
+
+def get_soup(url, user_agent=settings.USER_AGENT):
+    try:
+        response = requests.get(url, headers={"User-Agent": user_agent})
+    except requests.exceptions.MissingSchema:
+        response = requests.get('http://%s' % url, headers={"User-Agent": user_agent})
+    except requests.exceptions.ConnectionError as e:
+        logger.error("Connection refused for %s", url)
+        logger.error(e)
+        return None
+    if response.status_code == 200:
+        soup = BeautifulSoup(response.content, 'lxml')
+
+        # make sure document has a base
+        if not soup.find('base'):
+            obj = soup.find('head')
+            if obj:
+                obj.append(soup.new_tag("base", href=response.url))
+            else:
+                logger.error('No head for  %s', url)
+        return soup
+    else:
+        logger.error('%s returned code %s', url, response.status_code)
+    return None
diff --git a/core/loaders/tests.py b/core/loaders/tests.py
index 50a36911..17a34a59 100644
--- a/core/loaders/tests.py
+++ b/core/loaders/tests.py
@@ -23,6 +23,7 @@ class LoaderTests(TestCase):
         self.assertTrue(dropbox_ebf.ebook.filesize)
 
         jbe_url = 'http://www.jbe-platform.com/content/books/9789027295958'
-        jbe_ebook = Ebook.objects.create(format='online', url=jbe_url, edition=edition)
+        jbe_ebook = Ebook.objects.create(format='online', url=jbe_url, edition=edition, 
+                                         provider='jbe-platform.com')
         jbe_ebf, new_ebf = dl_online(jbe_ebook)
         self.assertTrue(jbe_ebf.ebook.filesize)
diff --git a/core/loaders/utils.py b/core/loaders/utils.py
index cbc45168..35f24f43 100644
--- a/core/loaders/utils.py
+++ b/core/loaders/utils.py
@@ -10,6 +10,7 @@ import requests
 
 from django.conf import settings
 
+
 from regluit.api.crosswalks import inv_relator_contrib
 from regluit.bisac.models import BisacHeading
 from regluit.core.bookloader import add_by_isbn_from_google, merge_works
@@ -18,6 +19,8 @@ from regluit.core.models import (
     Ebook, Edition, Identifier, Subject, Work,
 )
 
+from .soup import get_soup
+
 logger = logging.getLogger(__name__)
 
 def UnicodeDictReader(utf8_data, **kwargs):
@@ -41,29 +44,6 @@ def utf8_general_ci_norm(s):
     s1 = unicodedata.normalize('NFD', s)
     return ''.join(c for c in s1 if not unicodedata.combining(c)).upper()
 
-def get_soup(url, user_agent=settings.USER_AGENT):
-    try:
-        response = requests.get(url, headers={"User-Agent": user_agent})
-    except requests.exceptions.MissingSchema:
-        response = requests.get('http://%s' % url, headers={"User-Agent": user_agent})
-    except requests.exceptions.ConnectionError as e:
-        logger.error("Connection refused for %s", url)
-        logger.error(e)
-        return None
-    if response.status_code == 200:
-        soup = BeautifulSoup(response.content, 'lxml')
-
-        # make sure document has a base
-        if not soup.find('base'):
-            obj = soup.find('head')
-            if obj:
-                obj.append(soup.new_tag("base", href=response.url))
-            else:
-                logger.error('No head for  %s', url)
-        return soup
-    else:
-        logger.error('%s returned code %s', url, response.status_code)
-    return None
 
 def get_authors(book):
     authors = []
@@ -378,89 +358,3 @@ def ids_from_urls(url):
             ids[ident] = id_match.group('id')
     return ids
 
-def type_for_url(url, content_type=None, force=False, disposition=''):
-    url_disp = url + disposition
-    if not url:
-        return ''
-
-    # check to see if we already know
-    for ebook in Ebook.objects.filter(url=url):
-        if ebook.format != 'online':
-            return ebook.format
-
-    if not force:
-        if url.find('books.openedition.org') >= 0:
-            return 'online'
-    if content_type:
-        ct = content_type
-    else:
-        ct, disposition = contenttyper.calc_type(url)
-    url_disp = url + disposition
-    binary_type = re.search("octet-stream", ct) or re.search("application/binary", ct)
-    if re.search("pdf", ct):
-        return "pdf"
-    elif binary_type and re.search("pdf", url_disp, flags=re.I):
-        return "pdf"
-    elif binary_type and re.search("epub", url_disp, flags=re.I):
-        return "epub"
-    elif binary_type and re.search("mobi", url_disp, flags=re.I):
-        return "mobi"
-    elif re.search("text/plain", ct):
-        return "text"
-    elif re.search("text/html", ct):
-        if url.find('oapen.org/view') >= 0:
-            return "html"
-        return "online"
-    elif re.search("epub", ct):
-        return "epub"
-    elif re.search("mobi", ct):
-        return "mobi"
-    elif ct == '404':
-        return ct
-    # no content-type header!
-    elif ct == '' and re.search("epub", url_disp, flags=re.I):
-        return "epub"
-    elif ct == '' and re.search("pdf", url_disp, flags=re.I):
-        return "pdf"
-    elif ct == '' and re.search("mobi", url_disp, flags=re.I):
-        return "mobi"
-
-    return "other"
-
-class ContentTyper(object):
-    """ """
-    def __init__(self):
-        self.last_call = dict()
-
-    def content_type(self, url):
-        try:
-            r = requests.head(url, allow_redirects=True)
-            if r.status_code == 405:
-                r =  requests.get(url)
-            elif r.status_code == 404:
-                logger.error('File not found (404) for %s', url)
-                return '404', ''
-            return r.headers.get('content-type', ''), r.headers.get('content-disposition', '')
-        except:
-            return '', ''
-
-    def calc_type(self, url):
-        logger.info(url)
-        delay = 1
-        # is there a delay associated with the url
-        netloc = urlparse(url).netloc
-
-        # wait if necessary
-        last_call = self.last_call.get(netloc)
-        if last_call is not None:
-            now = time.time()
-            min_time_next_call = last_call + delay
-            if min_time_next_call > now:
-                time.sleep(min_time_next_call-now)
-
-        self.last_call[netloc] = time.time()
-
-        # compute the content-type
-        return self.content_type(url)
-
-contenttyper = ContentTyper()
diff --git a/core/models/__init__.py b/core/models/__init__.py
index 656838b1..13e1703e 100755
--- a/core/models/__init__.py
+++ b/core/models/__init__.py
@@ -61,6 +61,7 @@ from regluit.core.parameters import (
     THANKED,
     OFFER_CHOICES,
     ACQ_CHOICES,
+    GOOD_PROVIDERS,
 )
 from regluit.core.epub import personalize, ungluify, ask_epub
 from regluit.core.pdf import ask_pdf, pdf_append
@@ -79,7 +80,6 @@ from .bibmodels import (
     EbookFile,
     Edition,
     EditionNote,
-    good_providers,
     Identifier,
     path_for_file,
     Publisher,
@@ -893,9 +893,9 @@ class Campaign(models.Model):
     def make_mobis(self):
         # make archive files for ebooks, make mobi files for epubs
         versions = set()
-        for ebook in self.work.ebooks().filter(provider__in=good_providers, format='mobi'):
+        for ebook in self.work.ebooks().filter(provider__in=GOOD_PROVIDERS, format='mobi'):
             versions.add(ebook.version_label)
-        for ebook in self.work.ebooks_all().exclude(provider='Unglue.it').filter(provider__in=good_providers, format='epub'):
+        for ebook in self.work.ebooks_all().exclude(provider='Unglue.it').filter(provider__in=GOOD_PROVIDERS, format='epub'):
             if not ebook.version_label in versions:
                 # now make the mobi file
                 ebf = ebook.get_archive_ebf()
@@ -912,7 +912,7 @@ class Campaign(models.Model):
                 ebf.file.open()
                 to_dos.append({'content': ebf.file.read(), 'ebook': ebf.ebook})
                 format_versions.append(format_version)
-        for ebook in self.work.ebooks_all().exclude(provider='Unglue.it').filter(provider__in=good_providers):
+        for ebook in self.work.ebooks_all().exclude(provider='Unglue.it').filter(provider__in=GOOD_PROVIDERS):
             format_version = '{}_{}'.format(ebook.format, ebook.version_label)
             if ebook.format in ('pdf', 'epub') and not format_version in format_versions:
                 to_dos.append({'content': ebook.get_archive().read(), 'ebook': ebook})
@@ -1018,6 +1018,7 @@ class Campaign(models.Model):
             provider="Unglue.it",
             url=settings.BASE_URL_SECURE + reverse('download_campaign', args=[self.work_id, format]),
             version_label='unglued',
+            filesize=ebf.file.size,
         )
         old_ebooks = Ebook.objects.exclude(pk=ebook.pk).filter(
             edition=self.work.preferred_edition,
diff --git a/core/models/bibmodels.py b/core/models/bibmodels.py
index 1021663e..f2d4ea45 100644
--- a/core/models/bibmodels.py
+++ b/core/models/bibmodels.py
@@ -35,8 +35,8 @@ from regluit.core import mobi
 import regluit.core.cc as cc
 from regluit.core.epub import test_epub
 from regluit.core.links import id_url
+from regluit.core.loaders.harvest import dl_online
 from regluit.core.validation import valid_subject
-
 from regluit.core.parameters import (
     AGE_LEVEL_CHOICES,
     BORROWED,
@@ -56,7 +56,6 @@ from regluit.core.parameters import (
 ImageFile.LOAD_TRUNCATED_IMAGES = True
 
 logger = logging.getLogger(__name__)
-good_providers = ('Internet Archive', 'Unglue.it', 'Github', 'OAPEN Library', 'SciELO')
 
 def id_for(obj, type):
     if not obj.pk:
@@ -1143,7 +1142,7 @@ class EbookFile(models.Model):
             edition=self.edition,
             format='mobi',
             asking=self.asking,
-            source=self.file.url
+            source=self.file.url,
         )
             
         new_mobi_ebf.file.save(path_for_file(new_mobi_ebf, None), mobi_cf)
@@ -1157,6 +1156,7 @@ class EbookFile(models.Model):
                 rights=self.ebook.rights,
                 version_label=self.ebook.version_label,
                 version_iter=self.ebook.version_iter,
+                filesize=mobi_cf.size,
             )
             new_mobi_ebf.ebook = new_ebook
         new_mobi_ebf.save()
@@ -1205,40 +1205,15 @@ class Ebook(models.Model):
         return ebf.file
 
     def get_archive_ebf(self): # returns an ebf
-        if not self.ebook_files.filter(asking=False).exists():
-            if not self.provider in good_providers:
-                return None
-            try:
-                r = requests.get(self.url)
-                if r.status_code == 200:
-                    self.filesize = len(r.content)
-                    if self.save:
-                        self.filesize = self.filesize if self.filesize < 2147483647 else 2147483647  # largest safe positive integer
-                        self.save()
-                    ebf = EbookFile.objects.create(
-                        edition=self.edition,
-                        ebook=self,
-                        format=self.format,
-                        source=self.url
-                    )
-                    ebf.file.save(path_for_file(ebf, None), ContentFile(r.content))
-                    ebf.file.close()
-                    ebf.save()
-                    return ebf
-                else:
-                    logging.error('Bad link error: {}'.format(self.url))
-            except IOError:
-                logger.error(u'could not open {}'.format(self.url))
+        if self.ebook_files.filter(asking=False):
+            ebf = self.ebook_files.filter(asking=False).last()
+        elif EbookFile.objects.filter(source=self.url, format=self.format):
+            ebf = self.ebook_files.filter(asking=False).last()
         else:
-            ebf = self.ebook_files.filter(asking=False).order_by('-created')[0]
-            if not self.filesize:
-                try:
-                    self.filesize = ebf.file.size
-                    self.save()
-                except ClientError:
-                    # error thrown when the can't access the S3 bucket
-                    pass
-            return ebf
+            ebf, num = dl_online(self, format=self.format)
+            if not ebf:
+                return None
+        return ebf
 
     def set_provider(self):
         self.provider = Ebook.infer_provider(self.url)
diff --git a/core/models/loader.py b/core/models/loader.py
new file mode 100644
index 00000000..338599fa
--- /dev/null
+++ b/core/models/loader.py
@@ -0,0 +1,147 @@
+import logging
+import re
+import requests
+from urllib.parse import urlparse
+
+from django.apps import apps
+from django.conf import settings
+from django.core.files.base import ContentFile
+from django.forms import ValidationError
+
+from regluit.core.validation import test_file
+from regluit.core import models
+#from . import Ebook, EbookFile
+
+#Ebook = apps.get_model('core', 'Ebook')
+#EbookFile = apps.get_model('core', 'EbookFile')
+
+logger = logging.getLogger(__name__)
+
+def type_for_url(url, content_type=None, force=False, disposition=''):
+    url_disp = url + disposition
+    if not url:
+        return ''
+
+    # check to see if we already know
+    for ebook in models.Ebook.objects.filter(url=url):
+        if ebook.format != 'online':
+            return ebook.format
+
+    if not force:
+        if url.find('books.openedition.org') >= 0:
+            return 'online'
+    if content_type:
+        ct = content_type
+    else:
+        ct, disposition = contenttyper.calc_type(url)
+    url_disp = url + disposition
+    binary_type = re.search("octet-stream", ct) or re.search("application/binary", ct)
+    if re.search("pdf", ct):
+        return "pdf"
+    elif binary_type and re.search("pdf", url_disp, flags=re.I):
+        return "pdf"
+    elif binary_type and re.search("epub", url_disp, flags=re.I):
+        return "epub"
+    elif binary_type and re.search("mobi", url_disp, flags=re.I):
+        return "mobi"
+    elif re.search("text/plain", ct):
+        return "text"
+    elif re.search("text/html", ct):
+        if url.find('oapen.org/view') >= 0:
+            return "html"
+        return "online"
+    elif re.search("epub", ct):
+        return "epub"
+    elif re.search("mobi", ct):
+        return "mobi"
+    elif ct == '404':
+        return ct
+    # no content-type header!
+    elif ct == '' and re.search("epub", url_disp, flags=re.I):
+        return "epub"
+    elif ct == '' and re.search("pdf", url_disp, flags=re.I):
+        return "pdf"
+    elif ct == '' and re.search("mobi", url_disp, flags=re.I):
+        return "mobi"
+
+    return "other"
+
+class ContentTyper(object):
+    """ """
+    def __init__(self):
+        self.last_call = dict()
+
+    def content_type(self, url):
+        try:
+            r = requests.head(url, allow_redirects=True)
+            if r.status_code == 405:
+                r =  requests.get(url)
+            elif r.status_code == 404:
+                logger.error('File not found (404) for %s', url)
+                return '404', ''
+            return r.headers.get('content-type', ''), r.headers.get('content-disposition', '')
+        except:
+            return '', ''
+
+    def calc_type(self, url):
+        logger.info(url)
+        delay = 1
+        # is there a delay associated with the url
+        netloc = urlparse(url).netloc
+
+        # wait if necessary
+        last_call = self.last_call.get(netloc)
+        if last_call is not None:
+            now = time.time()
+            min_time_next_call = last_call + delay
+            if min_time_next_call > now:
+                time.sleep(min_time_next_call-now)
+
+        self.last_call[netloc] = time.time()
+
+        # compute the content-type
+        return self.content_type(url)
+
+contenttyper = ContentTyper()
+
+def load_ebookfile(url, format, user_agent=settings.USER_AGENT, method='GET'):
+    '''
+    return a ContentFile, format if a new ebook has been loaded
+    '''
+    ebfs = models.EbookFile.objects.filter(source=url)
+    if ebfs:
+        return None, ''
+    try:
+        if method == 'POST':
+            response = requests.post(url, headers={"User-Agent": user_agent})
+        else:
+            response = requests.get(url, headers={"User-Agent": user_agent})
+
+    except requests.exceptions.SSLError:
+        logger.error('bad certificate? for %s', url)
+        return None, ''
+    except IOError as e:
+        logger.error('could not open %', url)
+        return None, ''
+
+    if response.status_code == 200:
+        logger.debug(response.headers.get('content-type', ''))
+        resp_format = type_for_url(url, 
+                              content_type=response.headers.get('content-type', ''),
+                              disposition=response.headers.get('content-disposition', ''))
+        if resp_format == 'online' or (format != 'online' and resp_format != format):
+            logger.warning('response format %s for %s is not correct', resp_format, url)
+            return None, resp_format
+    else:
+        logger.warning('couldn\'t get %s', url)
+        return None, ''
+
+    contentfile = ContentFile(response.content)
+    try:
+        test_file(contentfile, resp_format)
+        return contentfile, resp_format
+    except ValidationError as e:
+        logger.error('downloaded %s was not a valid %s', url, format)
+        None, resp_format
+        
+
diff --git a/core/parameters.py b/core/parameters.py
index 1b39eb20..cbb03160 100644
--- a/core/parameters.py
+++ b/core/parameters.py
@@ -48,8 +48,5 @@ WORK_IDENTIFIERS = ('doi','olwk','glue','ltwk', 'http', 'doab')
 
 ID_CHOICES_MAP = dict(ID_CHOICES)
 
-
-
-
-
+GOOD_PROVIDERS = ('Internet Archive', 'Unglue.it', 'Github', 'OAPEN Library', 'SciELO')
 
diff --git a/distro/push.py b/distro/push.py
index d29015ed..4a485ff9 100644
--- a/distro/push.py
+++ b/distro/push.py
@@ -4,8 +4,9 @@ from io import StringIO
 
 
 from regluit.core.facets import BaseFacet
-from regluit.core.models import Work, good_providers
+from regluit.core.models import Work
 from regluit.api.onix import onix_feed
+from regluit.core.parameters import GOOD_PROVIDERS 
 
 from .models import Target
 
@@ -45,7 +46,7 @@ def get_target_facet(target, start=datetime(1900,1,1), new=False):
                     editions__ebooks__created__gt = start, 
                     identifiers__type="isbn", 
                     editions__ebooks__format__in = formats,
-                    editions__ebooks__provider__in = good_providers,
+                    editions__ebooks__provider__in = GOOD_PROVIDERS,
                     ).distinct().order_by('-featured')
                 
         model_filters = {"Ebook": format_filter, "Edition": edition_format_filter}    
diff --git a/frontend/views/__init__.py b/frontend/views/__init__.py
index 536d2488..01ebdd41 100755
--- a/frontend/views/__init__.py
+++ b/frontend/views/__init__.py
@@ -494,8 +494,9 @@ def manage_ebooks(request, edition_id, by=None):
         ebook_form = EbookForm(data = request.POST, files=request.FILES,)
         if ebook_form.is_valid():
             if ebook_form.cleaned_data.get('file', None):
+                file=ebook_form.cleaned_data['file']
                 new_ebf = models.EbookFile.objects.create(
-                    file=ebook_form.cleaned_data['file'],
+                    file=file,
                     format=ebook_form.cleaned_data['format'],
                     edition=edition,
                 )
@@ -504,6 +505,8 @@ def manage_ebooks(request, edition_id, by=None):
                 ebook_form.instance.save()
                 new_ebf.ebook = ebook_form.instance
                 new_ebf.save()
+                new_ebf.ebook.filesize = new_ebf.file.size
+                new_ebf.ebook.save()                
             else:
                 ebook_form.save()
                 ebook_form.instance.set_next_iter()