用django写的api，供第三方调用，但是出现个问题
一，问题
1.用form表单提交ok
2.用ajax方式显示失败，如下提示
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XMLHttpRequest cannot load http://www.itnihao.com/api，Origin null is not allowed by Access-Control-Allow-Origin.
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以上提示信息是跨域访问验证失败，因为django不允许这种跨域访问
二，解决办法
进入项目目录，新建文件
#mkidr middleware
#touch middleware/__init.py__
#vim middleware/crossdomainxhr.py
from django import http
try:
from django.conf import settings
XS_SHARING_ALLOWED_ORIGINS = settings.XS_SHARING_ALLOWED_ORIGINS
XS_SHARING_ALLOWED_METHODS = settings.XS_SHARING_ALLOWED_METHODS
XS_SHARING_ALLOWED_HEADERS = settings.XS_SHARING_ALLOWED_HEADERS
XS_SHARING_ALLOWED_CREDENTIALS = settings.XS_SHARING_ALLOWED_CREDENTIALS
except AttributeError:
XS_SHARING_ALLOWED_ORIGINS = '*'
#XS_SHARING_ALLOWED_METHODS = ['POST', 'GET', 'OPTIONS', 'PUT', 'DELETE']
XS_SHARING_ALLOWED_METHODS = ['POST', 'GET']
XS_SHARING_ALLOWED_HEADERS = ['Content-Type', '*']
XS_SHARING_ALLOWED_CREDENTIALS = 'true'
class XsSharing(object):
"""
This middleware allows cross-domain XHR using the html5 postMessage API.
Access-Control-Allow-Origin: http://foo.example
Access-Control-Allow-Methods: POST, GET, OPTIONS, PUT, DELETE
Based off https://gist.github.com/426829
"""
def process_request(self, request):
if 'HTTP_ACCESS_CONTROL_REQUEST_METHOD' in request.META:
response = http.HttpResponse()
response['Access-Control-Allow-Origin'] = XS_SHARING_ALLOWED_ORIGINS
response['Access-Control-Allow-Methods'] = ",".join( XS_SHARING_ALLOWED_METHODS )
response['Access-Control-Allow-Headers'] = ",".join( XS_SHARING_ALLOWED_HEADERS )
response['Access-Control-Allow-Credentials'] = XS_SHARING_ALLOWED_CREDENTIALS
return response
return None
def process_response(self, request, response):
response['Access-Control-Allow-Origin'] = XS_SHARING_ALLOWED_ORIGINS
response['Access-Control-Allow-Methods'] = ",".join( XS_SHARING_ALLOWED_METHODS )
response['Access-Control-Allow-Headers'] = ",".join( XS_SHARING_ALLOWED_HEADERS )
response['Access-Control-Allow-Credentials'] = XS_SHARING_ALLOWED_CREDENTIALS
return response
在settings.py添加（MIDDLEWARE_CLASSES这里添加）
'middleware.crossdomainxhr.XsSharing',
参考资料
https://gist.github.com/strogonoff/1369619
安装gevent
yum install gcc libevent libevent-devel
easy_install greenlet
easy_install pip
pip install gevent
pip freeze | grep gevent