我尝试使用axios对烧瓶服务器进行POST:
var config = { headers: {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*'}
}
axios.post("http://127.0.0.1:5000/test",
{ label : "Test" , text : "Test"} , config
)
.then(function (response) {
console.log(response);
})
.catch(function (error) {
console.log(error);
});
现在是Flask的一部分
...
data = request.get_json(silent=True)
item = {'label': data.get('label'), 'text': data.get('text')}
print item
...
但是,我最终会遇到以下错误:
XMLHttpRequest无法加载http://127.0.0.1:5000/test。对预检请求的响应未通过访问控制检查:请求的资源上不存在“Access-Control-Allow-Origin”标头。因此,不允许原点“http://localhost:3000”访问。
为什么呢?我LL按照建议设置标题。
这里的解决方案
from flask_cors import CORS, cross_origin
app = Flask(__name__)
cors = CORS(app, resources={r"/YOURAPP/*": {"origins": "*"}})
答案 0 :(得分:1)
您需要为Flask应用添加CORS支持。在此处查看相关威胁: Flask-CORS not working for POST, but working for GET。 Flask的一个流行的CORS扩展可以在这里找到:https://flask-cors.readthedocs.io/en/latest/。
答案 1 :(得分:0)
If anyone else is stuck, be sure to check your before
and after
request methods. My problem was this:
@app.before_request
def oauth_verify(*args, **kwargs):
"""Ensure the oauth authorization header is set"""
if not _is_oauth_valid():
return some_custome_error_response("you need oauth!")
So then this would raise an exception on any request, including an OPTIONS
method. Of course, the fix is easy:
@app.before_request
def oauth_verify(*args, **kwargs):
"""Ensure the oauth authorization header is set"""
if request.method in ['OPTIONS', ]:
return
if not _is_oauth_valid():
return some_custome_error_response("you need oauth!")