refactoring to make adding new formats possible

cps/book_formats.py

@@ -0,0 +1,50 @@
+__author__ = 'lemmsh'
+
+import uploader
+import os
+try:
+    from wand.image import Image
+    use_generic_pdf_cover = False
+except ImportError, e:
+    use_generic_pdf_cover = True
+
+def process(tmp_file_path, original_file_name, original_file_extension):
+    if (".PDF" == original_file_extension.upper()):
+        return pdf_meta(tmp_file_path, original_file_name, original_file_extension)
+    else: return None
+
+
+def pdf_meta(tmp_file_path, original_file_name, original_file_extension):
+    from PyPDF2 import PdfFileReader
+    pdf = PdfFileReader(open(tmp_file_path, 'rb'))
+    doc_info = pdf.getDocumentInfo()
+    print("!!!!!!!!!!!!!!")
+    print(doc_info.producer)
+    if (doc_info is not None):
+        author = doc_info.author
+        title = doc_info.title
+        subject = doc_info.subject
+    else:
+        author = "Unknown"
+        title = original_file_name
+        subject = ""
+    return uploader.BookMeta(
+        file_path = tmp_file_path,
+        extension = original_file_extension,
+        title = title,
+        author = author,
+        cover = pdf_preview(tmp_file_path, original_file_name),
+        description = subject,
+        tags = "",
+        series = "",
+        series_id="")
+
+def pdf_preview(tmp_file_path, tmp_dir):
+    if use_generic_pdf_cover:
+        return None
+    else:
+        cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.jpg"
+        with Image(filename=tmp_file_path + "[0]", resolution=150) as img:
+            img.compression_quality = 88
+            img.save(filename=os.path.join(tmp_dir, cover_file_name))
+        return cover_file_name

cps/uploader.py

@@ -0,0 +1,30 @@
+import os
+import hashlib
+from collections import namedtuple
+import book_formats
+
+
+tmp_dir = "/tmp/calibre-web"
+
+BookMeta = namedtuple('BookMeta', 'file_path, extension, title, author, cover, description, tags, series, series_id')
+
+
+"""
+ :rtype: BookMeta
+"""
+def upload(file):
+    if not os.path.isdir(tmp_dir):
+        os.mkdir(tmp_dir)
+
+    filename = file.filename
+    filename_root, file_extension = os.path.splitext(filename)
+    md5 = hashlib.md5()
+    md5.update(filename)
+    tmp_file_path = os.path.join(tmp_dir, md5.hexdigest())
+    file.save(tmp_file_path)
+    meta = book_formats.process(tmp_file_path, filename_root, file_extension)
+    return meta
+
+
+
+

cps/web.py

@@ -23,6 +23,7 @@ import base64
 from sqlalchemy.sql import *
 import json
 import datetime
+import book_formats
 from uuid import uuid4
 try:
     from wand.image import Image
@@ -1075,6 +1076,8 @@ def edit_book(book_id):
     else:
         return render_template('edit_book.html', book=book, authors=author_names, cc=cc)
 
+import uploader
+
 @app.route("/upload", methods = ["GET", "POST"])
 @login_required
 @upload_required
@@ -1086,20 +1089,17 @@ def upload():
     db.session.connection().connection.connection.create_function('uuid4', 0, lambda : str(uuid4()))
     if request.method == 'POST' and 'btn-upload' in request.files:
         file = request.files['btn-upload']
-        filename = file.filename
-        filename_root, fileextension = os.path.splitext(filename)
-        if fileextension.upper() == ".PDF":
-            title = filename_root
-            author = "Unknown"
-        else: 
-            flash("Upload is only available for PDF files", category="error")
-            return redirect(url_for('index'))
-        
+        meta = uploader.upload(file)
+
+        title = meta.title
+        author = meta.author
+
+
         title_dir = helper.get_valid_filename(title, False)
         author_dir = helper.get_valid_filename(author.decode('utf-8'), False)
         data_name = title_dir
         filepath = config.DB_ROOT + "/" + author_dir + "/" + title_dir
-        saved_filename = filepath + "/" + data_name + fileextension
+        saved_filename = filepath + "/" + data_name + meta.extension
         if not os.path.exists(filepath):
             try:
                 os.makedirs(filepath)
@@ -1107,21 +1107,20 @@ def upload():
                 flash("Failed to create path %s (Permission denied)." % filepath, category="error")
                 return redirect(url_for('index'))
         try:
-            file.save(saved_filename)
+            copyfile(meta.file_path, saved_filename) #remove as well
         except OSError:
             flash("Failed to store file %s (Permission denied)." % saved_filename, category="error")
             return redirect(url_for('index'))
+
         file_size = os.path.getsize(saved_filename)
-        has_cover = 0
-        if fileextension.upper() == ".PDF":
-            if use_generic_pdf_cover:
-                basedir = os.path.dirname(__file__)
-                copyfile(os.path.join(basedir, "static/generic_cover.jpg"), os.path.join(filepath, "cover.jpg"))
-            else:
-                with Image(filename=saved_filename + "[0]", resolution=150) as img:
-                    img.compression_quality = 88
-                    img.save(filename=os.path.join(filepath, "cover.jpg"))
-                    has_cover = 1
+        if meta.cover is None:
+            has_cover = 0
+            basedir = os.path.dirname(__file__)
+            copyfile(os.path.join(basedir, "static/generic_cover.jpg"), os.path.join(filepath, "cover.jpg"))
+        else:
+            has_cover = 1
+            copyfile(meta.cover, os.path.join(filepath, "cover.jpg"))
+
         is_author = db.session.query(db.Authors).filter(db.Authors.name == author).first()
         if is_author:
             db_author = is_author
@@ -1131,7 +1130,7 @@ def upload():
         path = os.path.join(author_dir, title_dir)
         db_book = db.Books(title, "", "", datetime.datetime.now(), datetime.datetime(101, 01,01), 1, datetime.datetime.now(), path, has_cover, db_author, [])
         db_book.authors.append(db_author)
-        db_data = db.Data(db_book, fileextension.upper()[1:], file_size, data_name)
+        db_data = db.Data(db_book, meta.extension.upper()[1:], file_size, data_name)
         db_book.data.append(db_data)
         
         db.session.add(db_book)