[英]Capture Request Headers whenever a static file is requested in Flask App
全部,
每當向端點發出請求時,我都能夠捕獲請求標頭,但我想知道在請求 static 文件時如何捕獲請求標頭。
例如,每當請求通過此端點獲取圖像時,我都可以將標頭寫入帶有時間戳的 .txt 文件,如下所示。
https://<host_name>/img
請求標頭示例:
============================
28/05/2020, 14:31:03
Request Headers:
Host: <host_name>
Connection: close
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Sec-Fetch-Site: none
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9,kn;q=0.8
X-Request-Id: 00a79a7f-84eb-4fb3-b949-76254a93a001
X-Forwarded-For: 157.49.191.87
X-Forwarded-Proto: https
X-Forwarded-Port: 443
Via: 1.1 vegur
Connect-Time: 0
X-Request-Start: 1590676263802
Total-Route-Time: 0
============================
但是當有人像這樣直接訪問 static 對象時:
https://<host_name>/static/img/<img_name>.png
在沒有任何路由或視圖作為上述端點直接請求時,如何捕獲 static 對象的請求標頭?
目前,我正在使用 Flask 中的request.headers
捕獲請求標頭。 我的 img 端點的 function 如下所示:
@app.route('/img')
def img_func():
req_headers = request.headers
dir = "static"
full_path = os.path.join(dir, "logs")
filename = full_path +'/request_headers_img.txt'
if os.path.exists(filename):
append_write = 'a' # append if already exists
else:
append_write = 'w' # make a new file if not
now = datetime.datetime.now()
date_time = now.strftime("%d/%m/%Y, %H:%M:%S")
app_logs = open(filename, append_write)
app_logs.write("============================" + '\n')
app_logs.write(date_time + '\n')
app_logs.write("Request Headers: " + '\n' + str(req_headers))
app_logs.write("============================"+ '\n')
app_logs.close()
fn = os.path.join(dir, "img") + '/<file_name>.png'
return send_file(fn)
當我確實檢查了一些在線鏈接時,有人提到使用request.path('static')
但不確定如何實現這一點並捕獲請求標頭。
One more thing which was mentioned there that the static files are being served from the webserver like Nginx
or Apache
, not from the flask app if static files are requested directly as I mentioned above. 如果是這樣,有沒有辦法在網絡服務器級別捕獲這些 static 請求標頭?
僅供參考:該應用程序是使用 Flask、Python 3 構建的,並使用 Heroku 使用來自 ZE301ADBCBB9F9DDEZ726 的 CI/CD 部署到 Heroku。
任何關於此的幫助,或者如果有人可以指出我可以閱讀和實施的資源,這將是非常有用的人。
提前致謝!
好的,所以我要回答
(a) 每當在 Flask 應用程序中請求 static 文件時,捕獲請求標頭?
@app.route("/static/<var1>/<var2>")
def test(var1,var2):
print(request.headers)
return "hehe"
讓我知道這是否適合您,並回答您問題的 (a) 部分
這是我正在尋找的更新代碼:
@app.route('/sta/<path:path>')
def getStaticFile(path):
fn = str(path).split("/")[-1]
file_type = str(fn).split(".")[-1]
dir = "static"
full_path = os.path.join(dir, "logs")
if file_type == 'png':
req_headers = request.headers
filename = full_path + '/request_headers_img.txt'
if os.path.exists(filename):
append_write = 'a' # append if already exists
else:
append_write = 'w' # make a new file if not
now = datetime.datetime.now()
date_time = now.strftime("%d/%m/%Y, %H:%M:%S")
app_logs = open(filename, append_write)
app_logs.write("============================" + '\n')
app_logs.write(date_time + '\n')
app_logs.write("Request Headers: " + '\n' + str(req_headers))
app_logs.write("============================" + '\n')
app_logs.close()
return send_from_directory('static', path)
我應該使用<path:path>
而不是<var1>/<var2>
。 謝謝,Akib 調查它!
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