使用requests.post请求

上图的URL

hash值在上图的位置。

该图是response

#coding=utf-8
import requests
from bs4 import BeautifulSoup

get_url="http://www.szhec.gov.cn/pages/szepb/kqzl/TGzfwHjKqzlzs.jsp?FLAG=FIRSTFW"#获取hash值
post_url="http://www.szhec.gov.cn/pages/szepb/kqzl/TGzfwHjKqzlzs.jsp" #获取空气质量时报
html=requests.get(get_url)
#使用beautiful解析网页，获取hash值
html_soup=BeautifulSoup(html.text,"html.parser")
hash=html_soup.select("input[name=hash]")
hash=hash[0].get('value')
#构造data
data={

'hash':hash, 'FROM_SELF':'true', 'q_JCRQ':'2016-04-01', 'q_SDATE':'00', 'q_JCDW':'', 'q_JCDW_text':'',

}
#至此已经正确获取了控制质量时报的信息
tqHtml=requests.post(post_url,data=data)
print tqHtml.text

右键检查元素，查看 network，选择一个时间搜索，查看调用的 ajax API 地址：

接上：
我大概用了这段代码试了下，程序既不报错也没有结果。请问错在哪？
import requests
import xlwt
from bs4 import BeautifulSoup
import datetime
import tqdm

def datelist(start, end):

start_date = datetime.datetime(*start) end_date = datetime.datetime(*end) result = [] curr_date = start_date while curr_date != end_date: result.append("%04d-%02d-%02d-%02d" % (curr_date.year, curr_date.month, curr_date.day,curr_date.hour)) return result

def get_html():

global h s = requests.session() url = 'http://www.szhec.gov.cn/pages/szepb/kqzl/TGzfwHjKqzlzs.jsp' headers = { 'User-Agent':'Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0_1 like Mac OS X; ja-jp) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A306 Safari/6531.22.7', 'Referer':'http://www.szhec.gov.cn/pages/szepb/kqzl/TGzfwHjKqzlzs.jsp', 'Host':'www.szhec.gov.cn', 'Cookie':'JSESSIONID=1F7389E70413F613C3A166D8F5A963C4', 'Connection':'keep-alive', 'Accept-Language':'zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3', 'Accept-Encoding':'gzip, deflate', 'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8' } r = s.post(url, data=dt, headers=headers) h = r.content.decode('utf-8')

def get_excel():

book = xlwt.Workbook(encoding = 'utf-8',style_compression=0) sheet = book.add_sheet('data',cell_overwrite_ok = True) global dt j = 0 for each in datelist((2016, 3, 1,0), (2016, 3, 31,23)): dt = {'cdateEnd':each,'pageNo1':'1','pageNo2':''} get_html() soup = BeautifulSoup(h, "html.parser") #j = 0 for tabb in soup.find_all('tr'): i=0; for tdd in tabb.find_all('td'): #print (tdd.get_text()+",",) sheet.write(j,i,tdd.get_text()) i = i+1 j=j+1 book.save(r'.\\re'+each+'.xls')

get_excel()