提交形式

Question

我試圖提交表單到http://apps.fas.usda.gov/esrquery/esrq.aspx在python，使用下面的代碼：

import urllib 
from bs4 import BeautifulSoup 
import mechanize 
import datetime 

today = datetime.date.today().strftime("%m/%d/%Y") 

url = 'http://apps.fas.usda.gov/esrquery/esrq.aspx' 
html = urllib.urlopen(url).read() 
soup = BeautifulSoup(html) 
viewstate = soup.find('input', {'id' : '__VIEWSTATE'})['value'] 
eventval = soup.find('input', {'id' : '__EVENTVALIDATION'})['value'] 

br = mechanize.Browser(factory=mechanize.RobustFactory()) 
br.addheaders = [('User-agent', 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.1) Gecko/2008071615 Fedora/3.0.1-1.fc9 Firefox/3.0.1')] 
br.open(url) 

# fill form 

br.select_form("aspnetForm") 
br.form.set_all_readonly(False) 
br.form['__EVENTTARGET'] = '' 
br.form['__EVENTARGUMENT'] = '' 
br.form['__LASTFOCUS'] = '' 
br.form['__VIEWSTATE'] = viewstate 
br.form['__VIEWSTATEGENERATOR'] = '41AA5B91' 
br.form['__EVENTVALIDATION'] = eventval 
br.form['ctl00$MainContent$lbCommodity'] = ['401'] 
br.form['ctl00$MainContent$lbCountry'] = ['0:0'] 
br.form['ctl00$MainContent$ddlReportFormat'] = ['10'] 
br.find_control('ctl00$MainContent$cbxSumGrand').items[0].selected = True 
br.find_control('ctl00$MainContent$cbxSumKnown').items[0].selected = False 
br.form['ctl00$MainContent$rblOutputType'] = ['2'] 
br.form['ctl00$MainContent$tbStartDate'] = '01/01/1999' 
br.form['ctl00$MainContent$ibtnStart'] = '' 
br.form['ctl00$MainContent$tbEndDate'] = today 
br.form['ctl00$MainContent$ibtnEnd'] = '' 
br.form['ctl00$MainContent$rblColumnSelection'] = ['regular'] 

response = br.submit() 

我得到的響應基本上是與形式的網站只是html代碼按預期填寫。然而，我期待一個Excel文件（因爲我選擇了OutputType值爲2）

我想我在提交前面缺少一些東西。有人可以解釋我缺少的東西嗎？

Answer 1

您已經很近了，但您在提交後還需要做更多。在這種情況下，只需添加：

doc = response.read() 
ofile = '<your path>' 
with open(ofile, 'w') as f: 
    f.write(doc) 

我不能真正在您的網站目前測試這一點，所以我只是假設你所有的設置，在此之前是正確的。我只有Python 3在工作，機械化僅適用於2.x.無論如何，這通常是您想要檢索這種輸出的方式。