added food52_spider

scrapy_proj/openrecipes/spiders/food52_spider.py

@@ -0,0 +1,69 @@
+from scrapy.contrib.spiders import CrawlSpider, Rule
+from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor
+from scrapy.selector import HtmlXPathSelector
+from openrecipes.items import RecipeItem, RecipeItemLoader
+
+
+class Food52Mixin(object):
+    source = 'food52'
+
+    def parse_item(self, response):
+
+        hxs = HtmlXPathSelector(response)
+
+        base_path = '//*[@itemtype="http://schema.org/Recipe"]'
+
+        recipes_scopes = hxs.select(base_path)
+
+        name_path = '//*[@itemprop="name"]/text()'
+        #may be too useless
+        description_path = '//*[@class="recipe-note"]/text()'
+        image_path = '//figure[@class="photo-frame first"]/img/@src'
+        recipeYield_path = '//*[@itemprop="recipeYield"]/strong/em/text()'
+        ingredients_path = '*//*[@itemprop="ingredients"]'
+
+        recipes = []
+
+        for r_scope in recipes_scopes:
+            il = RecipeItemLoader(item=RecipeItem())
+
+            il.add_value('source', self.source)
+
+            il.add_value('name', r_scope.select(name_path).extract())
+            il.add_value('image', r_scope.select(image_path).extract())
+            il.add_value('url', response.url)
+            il.add_value('description', r_scope.select(description_path).extract())
+
+            il.add_value('recipeYield', r_scope.select(recipeYield_path).extract())
+
+            ingredient_scopes = r_scope.select(ingredients_path)
+            ingredients = []
+            for i_scope in ingredient_scopes:
+                amount = i_scope.select('*[@class="quantity"]/text()').extract()
+                name = i_scope.select('*[@class="item-name"]/text()').extract()
+                amount = "".join(amount).strip()
+                name = "".join(name).strip()
+                ingredients.append("%s %s" % (amount, name))
+            il.add_value('ingredients', ingredients)
+
+            recipes.append(il.load_item())
+
+        return recipes
+
+
+class Food52crawlSpider(CrawlSpider, Food52Mixin):
+
+    name = "food52.com"
+
+    allowed_domains = ["food52.com"]
+
+    start_urls = [
+        "http://food52.com/recipes/search?cat=popular",
+    ]
+
+    rules = (
+        Rule(SgmlLinkExtractor(allow=('/recipes/search?cat=popular&page=\d+'))),
+        #may want to double check this last reg exp.
+        Rule(SgmlLinkExtractor(allow=('/recipes/\d+-[a-z]+')),
+             callback='parse_item'),
+    )