引數為空時Flask回傳什么

我正在為道德黑客創建一個網站，他們可以在其中搜索 Collections 1-5' 資料泄露的資料庫。我正在讓這個應用程式使用 URL 引數，為了使應用程式簡單，我只是將我不使用的引數留空 ex。username=&password=pass但我的問題是有時（因為它在此之前作業）回傳一個我無法弄清楚的隨機值。

例如，假設變數被呼叫var1，我做了一個 If 陳述句-確保它不為空，所以我這樣做

if var1 != "":
    pass

但是有一些奇怪的值通過并且 if 陳述句仍在運行。

我試過的：

我嘗試向 if 陳述句添加多個值，這些值也可能是空白的，例如， var1 != "" or var1 != None or var1 != " "

這是我與郵遞員一起使用的確切 URL，它會拋出一個500 500 INTERNAL SERVER ERROR

http://localhost:6969/search/shordan?ip=&port=&domain=&formated_domain=&asn=&isp=&orginization=&tag=&product=&city=i&country=u&email=&tel=

請注意，我只在第一個 if 回圈中添加了額外的or !=陳述句，用于測驗不起作用

這些是我的 if 陳述句

if ip != "" or ip != None or ip != " ":
    IP = f"ip LIKE '%{ip}%' "
    andCounter  = 1
    hasIP = True
else:
    IP = ""
if port != "" or port != None:
    Port = f"Port LIKE '%{port}%' "
    andCounter  = 1
    hasPort = True
else:
    Port = ""
if domain != "" or domain != None:
    Domain = f"Domain LIKE '%{domain}%' "
    andCounter  = 1
    hasDomain = True
else:
    Domain = ""
if formatedDomain != "" or formatedDomain != None:
    FormatedDomain = f"'FORMATED DOMAIN' LIKE '%{formatedDomain}%' "
    andCounter  = 1
    hasFormatedDomain = True
else:
    formatedDomain = ""
if asn != "" or asn != None:
    print("asn: "   asn)
    Asn = f"asn LIKE '%{asn}%' "
    andCounter  = 1
    hasAsn = True
else:
    Asn = ""
if isp != "" or isp != None:
    ISP = f"ISP LIKE '%{isp}%' "
    andCounter  = 1
    hasISP = True
else:
    ISP = ""
if orginization != "" or orginization != None:
    Orginization = f"ORGANIZATION LIKE '%{orginization}%' "
    andCounter  = 1
    hasOrginization = True
else:
    Orginization = ""
if tag != "" or tag != None:
    Tag = f"tags LIKE '%{tag}%' "
    andCounter  = 1
    hasTag = True
else:
    Tag = ""
if product != "" or product != None:
    print("product: "   product)
    Product = f"product LIKE '%{product}%' "
    andCounter  = 1
    hasProduct = True
else:
    Product = ""
if city != "" or city != None:
    print("city: "   city)
    City = f"city LIKE '%{city}%' "
    andCounter  = 1
    hasCity = True
else:
    City = ""
if country != "" or country != None:
    Country = f"country LIKE '%{country}%' "
    andCounter  = 1
    hasCountry = True
else:
    Country = ""
if email != "" or email != None:
    Email = f"email LIKE '%{email}%' "
    andCounter  = 1
    hasEmail = True
else:
    Email = ""
if tel != "" or tel != None:
    Tel = f"tel LIKE '%{tel}%' "
    andCounter  = 1
    hasTel = True
else:
    Tel = ""

如果它有幫助，我讓 if 陳述句成為一個變數True，如果 if 陳述句運行，那么我列印了它，這些是結果

Has IP: True
has Port: True
Has Domain: True
Has Formated Domain: True
hasASN: False
hasISP: True
hasOrginization: True
hasTag: True
hasProduct: True
hasCity: True
hasCountry: True
hasEmail: True
hasTel: True

uj5u.com熱心網友回復：

我試圖通過以下方式驗證引數是否為空：

@app.route("/test",methods=["GET"]) 
def test():
  emptyvalues = ["", "''", " ", "' '", None, '""', '" "']
  data = request.args
  if "ip" in data and data["ip"] not in emptyvalues:
    hasIP = True
  else:
    hasIP = False
  if "port" in data and data["port"] not in emptyvalues:
    hasPort = True
  else:
    hasPort = False

  print(hasIP, hasPort)
  print(data)
  return 'hello'

我用了

/test?ip=123&port=&domain=&formated_domain=&asn=&isp=&orginization=&tag=&product=&city=i&country=u&email=&tel=

結果

True
False
ImmutableMultiDict([('ip', '123'), ('port', ''), ('domain', ''), ('formated_domain', ''), ('asn', ''), ('isp', ''), ('orginization', ''), ('tag', ''), ('product', ''), ('city', 'i'), ('country', 'u'), ('email', ''), ('tel', '')])

您的代碼使用“或”而不是“和”，這就是無效輸入傳遞為 True 的原因

標籤：Python if 语句 烧瓶 烧瓶宁静的 网址参数

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