我收到“异常消息是：400错误的请求：浏览器（或代理）发送了该服务器无法理解的请求。”执行此代码时出错。我没有得到错误，为什么它提示异常阻止。请帮忙！
import os
from flask import Flask, render_template, request, jsonify
from flask_cors import CORS, cross_origin
import requests
from bs4 import BeautifulSoup as bs
from urllib.request import urlopen as uReq
app = Flask(__name__)
@app.route('/', methods=['GET'])
@cross_origin()
def homePage():
return render_template("index.html")
@app.route('/review', methods=['POST', 'GET']) # route to show the review comments in a web UI
@cross_origin()
def index():
if request.method == 'POST':
try:
searchString = request.form['content'].replace(" ", "")
flipkart_url = "https://www.flipkart.com/search?q=" + searchString
uClient = uReq(flipkart_url)
flipkartPage = uClient.read()
uClient.close()
flipkart_html = bs(flipkartPage, "html.parser")
bigboxes = flipkart_html.findAll("div", {"class": "bhgxx2 col-12-12"})
del bigboxes[0:3]
box = bigboxes[0]
productLink = "https://www.flipkart.com" + box.div.div.div.a['href']
prodRes = requests.get(productLink)
prodRes.encoding = 'utf-8'
prod_html = bs(prodRes.text, "html.parser")
commentboxes = prod_html.find_all('div', {'class': "_3nrCtb"})
filename = searchString + ".csv"
fw = open(filename, "w")
headers = "Product, Customer Name, Rating, Heading, Comment \n"
fw.write(headers)
reviews = []
for commentbox in commentboxes:
try:
# name.encode(encoding='utf-8')
name = commentbox.div.div.find_all('p', {'class': '_3LYOAd _3sxSiS'})[0].text
except:
name = 'No Name'
try:
# rating.encode(encoding='utf-8')
rating = commentbox.div.div.div.div.text
except:
rating = 'No Rating'
try:
# commentHead.encode(encoding='utf-8')
commentHead = commentbox.div.div.div.p.text
except:
commentHead = 'No Comment Heading'
try:
comtag = commentbox.div.div.find_all('div', {'class': ''})
# custComment.encode(encoding='utf-8')
custComment = comtag[0].div.text
except Exception as e:
print("Exception while creating dictionary: ", e)
mydict = {"Product": searchString, "Name": name, "Rating": rating, "CommentHead": commentHead,"Comment": custComment}
reviews.append(mydict)
return render_template('results.html', reviews=reviews[0:(len(reviews) - 1)])
except Exception as e:
print('The Exception message is: ', e)
return 'something is wrong'
else:
return render_template('index.html')
if __name__ == "__main__":
#app.run(host='0.0.0.0', port=5000)
#app.run(host='0.0.0.0', port=port) #for sever
app.run(host='127.0.0.1', port=8001, debug=True)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
</head>
<title>Welcome to Review Scrapper</title>
<link rel="stylesheet" href="../static/css/fonts/all.css">
<link rel="stylesheet" type="text/css" href="../static/css/main.css">
<nav id='navbar'>
<text class="logo">Review Scrapper</text>
<a href='#content'>Home</a>
<a href='https://github.com/rs301378'>Github</a>
<a href='https://www.linkedin.com/in/rohit-sharma-52b369158/'>Portfolio</a>
</nav>
<body>
<div class="content">
<form action="/review" method="POST">
<input class="search-box-input" type="text" id="content" placeholder="Search anything...">
<button class="search-box-button" type="submit" value="Search">Search</button>
</form>
</div>
<footer>
Made with <i class='fas fa-heart'></i> by Rohit Sharma
</footer>
</body>
</html>
答案 0 :(得分：0)
您的烧瓶部分没问题。问题是您的HTML表单。属性名称访问html形式的每个输入。如果调用form.request["content"]，则要获取名称为content的输入值。您的输入甚至没有属性名称（只是一个带有名称内容的ID，但这并不足够）。
更改您的<input>元素（添加name="content"）
<input name="content" class="search-box-input" type="text" id="content" placeholder="Search anything...">