javascript - 添加http响应头

Question

我已经用 python 在 Heroku 中编写了一个 Web 应用程序，并希望授予 javascript 客户端对我的资源的基本访问权限。我一直在阅读这篇关于如何做到这一点的文章:https://www.w3.org/wiki/CORS_Enabled

从文章中我发现我应该执行以下操作:

print("Content-Type: text/turtle")
print("Content-Location: mydata.ttl")
print("Access-Control-Allow-Origin: *")

procfile如下:web: python app.py
app.py如下:

#!/usr/bin/env python
import gevent.monkey
gevent.monkey.patch_all()
import bottle
import os
@bottle.route('/')

def index():
    print("Content-Type: text/turtle")
    print("Content-Location: mydata.ttl")
    print("Access-Control-Allow-Origin: *")
    return("testing")

bottle.run(server='gevent', host='0.0.0.0', port=os.environ.get('PORT', 5000))

但是我仍然无法访问资源，我收到此错误:

Failed to load https://ksmlgames.herokuapp.com/: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.

感谢您的帮助

#!/usr/bin/env python
import gevent.monkey
gevent.monkey.patch_all()
import bottle
import os
@bottle.route('/')


def index():
    response.set_header("Content-Type", "text/turtle")
    response.set_header("Content-Location", "mydata.ttl")
    response.set_header("Access-Control-Allow-Origin", "*")
    return("testing")

bottle.run(server='gevent', host='0.0.0.0', port=os.environ.get('PORT', 5000))

@thmsdnnr，这似乎有效，谢谢

Answer 1

您需要使用response.set_header .

def index():
  response.set_header("Content-Type", "text/turtle")
  response.set_header("Content-Location", "mydata.ttl")
  response.set_header("Access-Control-Allow-Origin", "*")
  return("testing")

如果您发现自己对许多路由都这样做，则可以设置“after_request” Hook like this .