英文:
X-HTTP-Method-Override in Flask's Python Web server
问题
I'm learning HTTP and I try to learn how different headers work. I want to implement a simple HTTP server using Flask and Python just to test the X-HTTP-Method-Override header.
My code:
class HTTPMethodOverrideMiddleware(object):allowed_methods = frozenset(["GET", "HEAD", "POST", "DELETE", "PUT", "PATCH", "OPTIONS"])bodyless_methods = frozenset(["GET", "HEAD", "OPTIONS", "DELETE"])def __init__(self, app):self.app = appdef __call__(self, environ, start_response):method = environ.get("HTTP_X_HTTP_METHOD_OVERRIDE", "").upper()if method in self.allowed_methods:environ["REQUEST_METHOD"] = methodif method in self.bodyless_methods:environ["CONTENT_LENGTH"] = "0"return self.app(environ, start_response)from flask import Flask, requestapp = Flask(__name__)@app.route("/")def index():return request.methodapp.wsgi_app = HTTPMethodOverrideMiddleware(app.wsgi_app)app.run(host="0.0.0.0", port=9090)
When I'm sending this curl request: curl -X GET "http://127.0.0.1:9090" server returns GET, which is OK, but with this: curl -X GET "http://127.0.0.1:9090" --header "X-HTTP-Method-Override : POST" it still shows GET instead of POST.
What is wrong? The code or curl?
英文:
I'm learning HTTP and I try to learn how different headers work. I want to implement a simple HTTP server using Flask and Python just to test theX-HTTP-Method-Override header.
My code:
class HTTPMethodOverrideMiddleware(object):allowed_methods = frozenset(["GET", "HEAD", "POST", "DELETE", "PUT", "PATCH", "OPTIONS"])bodyless_methods = frozenset(["GET", "HEAD", "OPTIONS", "DELETE"])def __init__(self, app):self.app = appdef __call__(self, environ, start_response):method = environ.get("HTTP_X_HTTP_METHOD_OVERRIDE", "").upper()if method in self.allowed_methods:environ["REQUEST_METHOD"] = methodif method in self.bodyless_methods:environ["CONTENT_LENGTH"] = "0"return self.app(environ, start_response)from flask import Flask, requestapp = Flask(__name__)@app.route("/")def index():return request.methodapp.wsgi_app = HTTPMethodOverrideMiddleware(app.wsgi_app)app.run(host="0.0.0.0", port=9090)
When I'm sending this curl request: curl -X GET "http://127.0.0.1:9090" server returns GET, which is OK, but with this: curl -X GET "http://127.0.0.1:9090" --header "X-HTTP-Method-Override : POST" it still shows GET instead of POST.
What is wrong? The code or curl?
答案1
得分: 1
问题出现在代码和curl命令中。
您需要允许路由上的方法，像这样：
@app.route("/", methods=["GET", "POST"])def index():return request.method
这将允许路由上的 GET 和 POST 方法，使您能够执行以下命令：
curl -X GET "http://127.0.0.1:9090" --header "X-HTTP-Method-Override: POST"
curl -X POST "http://127.0.0.1:9090" --header "X-HTTP-Method-Override: GET"
您在 --header 中的 : 之间有空格，导致它无法正确解析。
英文:
The issue is in both code and curl command.
You need to allow the methods on the route, like this:
@app.route("/", methods = ["GET", "POST"])def index():return request.method
This will allow GET and POST methods on the route, enabling you to execute the following commands:
curl -X GET "http://127.0.0.1:9090" --header "X-HTTP-Method-Override: POST"
curl -X POST "http://127.0.0.1:9090" --header "X-HTTP-Method-Override: GET"
You had spaces between : in the --header which caused it not parsing corrently.
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