架构风格：RESTful
服务类型：
-
验证码生成
-
验证码请求
-
验证码校验
-
验证码识别
依赖：
$ pip install Flask
$ pip install flask-restful
$ pip install redis
$ pip install Pillow
$ pip install pytesseract
$ pip install gunicorn
$ pip install supervisor
启动
$ cd captcha_project
$ virtualenv captcha.env
$ source captcha.env/bin/activate
$ supervisord -c etc/supervisord.conf
$ supervisorctl -c etc/supervisord.conf reload
$ supervisorctl -c etc/supervisord.conf restart all
tesseract-ocr 包安装方式：
$ sudo apt-get install tesseract-ocr
tesseract-ocr 源码安装方式：
github 项目地址： https://github.com/tesseract-ocr/tesseract
下载主分支稳定版： https://github.com/tesseract-ocr/tesseract/archive/master.zip
./autogen.sh
./configure
make
sudo make install
sudo ldconfig
对于非 linux 系统, 以下文件 tesseract_cmd 根据需要修改 captcha.env/local/lib/python2.7/site-packages/pytesseract/pytesseract.py
# CHANGE THIS IF TESSERACT IS NOT IN YOUR PATH, OR IS NAMED DIFFERENTLY
tesseract_cmd = 'tesseract'
Flask-RESTful provides the building blocks for creating a great REST API.
https://github.com/flask-restful/flask-restful
http://flask-restful.readthedocs.io/en/latest/
http://www.pythondoc.com/Flask-RESTful/
典型的项目结构
myapi/
__init__.py
app.py # this file contains your app and routes
resources/
__init__.py
foo.py # contains logic for /Foo
bar.py # contains logic for /Bar
common/
__init__.py
util.py # just some common infrastructure