drop support for couchdb

.travis.yml

@@ -13,12 +13,13 @@ services:
     - mysql
     # - elasticsearch
     - postgresql
-    - couchdb
 addons:
   postgresql: "9.4"
   apt:
     packages:
     - rabbitmq-server
+env:
+    - IGNORE_COUCHDB=1
 
 before_install:
     - sudo apt-get update -qq

README.md

@@ -5,7 +5,7 @@ A Powerful Spider(Web Crawler) System in Python.
 
 - Write script in Python
 - Powerful WebUI with script editor, task monitor, project manager and result viewer
-- [MySQL](https://www.mysql.com/), [CouchDB](https://couchdb.apache.org), [MongoDB](https://www.mongodb.org/), [Redis](http://redis.io/), [SQLite](https://www.sqlite.org/), [Elasticsearch](https://www.elastic.co/products/elasticsearch); [PostgreSQL](http://www.postgresql.org/) with [SQLAlchemy](http://www.sqlalchemy.org/) as database backend
+- [MySQL](https://www.mysql.com/), [MongoDB](https://www.mongodb.org/), [Redis](http://redis.io/), [SQLite](https://www.sqlite.org/), [Elasticsearch](https://www.elastic.co/products/elasticsearch); [PostgreSQL](http://www.postgresql.org/) with [SQLAlchemy](http://www.sqlalchemy.org/) as database backend
 - [RabbitMQ](http://www.rabbitmq.com/), [Redis](http://redis.io/) and [Kombu](http://kombu.readthedocs.org/) as message queue
 - Task priority, retry, periodical, recrawl by age, etc...
 - Distributed architecture, Crawl Javascript pages, Python 2.{6,7}, 3.{3,4,5,6} support, etc...

pyspider/database/couchdb/projectdb.py

@@ -31,7 +31,7 @@ class ProjectDB(BaseProjectDB):
             },
             'name': self.__collection_name__ + "_" + database
         }
-        res = self.session.post(self.url+"_index", json=payload).json()
+        res = self.session.post(self.url + "_index", json=payload).json()
         self.index = res['id']
 
     def _default_fields(self, each):