我正在编写一个快速应用程序来查看一个巨大的XML文件,其中包含对viewgroup
的一些AJAX样式调用。我的问题是session['groups']
没有坚持。我有一些旧的阵列只有4个成员卡在某处(cookie?..)。调用view
时会显示该值。然后,我用最近打开的包含20多个成员的xml文件中的信息覆盖该会话成员。
但是,当调用viewgroup
时,会话变量已恢复为旧值,阵列中只有4个成员!
代码后跟输出。请注意3 sessionStatus()
次调用
def sessionStatus():
print "# of groups in session = " + str(len(session['groups']))
@app.route('/')
def index():
cams = [file for file in os.listdir('xml/') if file.lower().endswith('xml')]
return render_template('index.html', cam_files=cams)
@app.route('/view/<xmlfile>')
def view(xmlfile):
path = 'xml/' + secure_filename(xmlfile)
print 'opening ' + path
xmlf = open(path, 'r')
tree = etree.parse(xmlf)
root = tree.getroot()
p = re.compile(r'Group')
groups = []
for g in root:
if (p.search(g.tag) is not None) and (g.attrib['Comment'] != 'Root'):
groups.append(Group(g.attrib['Comment']))
sessionStatus()
session['groups'] = groups
sessionStatus()
return render_template('view.html', xml=xmlfile, groups=groups)
@app.route('/viewgroup/<name>')
def viewGroup(name):
groups = session['groups']
sessionStatus()
if groups is None or len(groups) == 0:
raise Exception('invalid group name')
groups_filtered = [g for g in groups if g.name == name]
if len(groups_filtered) != 1:
raise Exception('invalid group name', groups_filtered)
group = groups_filtered[0]
prop_names = [p.name for p in group.properties]
return prop_names
输出
opening xml/d.xml
# of groups in session = 5
# of groups in session = 57
127.0.0.1 - - [17/Aug/2011 17:27:29] "GET /view/d.xml HTTP/1.1" 200 -
127.0.0.1 - - [17/Aug/2011 17:27:29] "GET /static/ivtl.css HTTP/1.1" 304 -
127.0.0.1 - - [17/Aug/2011 17:27:29] "GET /static/jquery.js HTTP/1.1" 304 -
127.0.0.1 - - [17/Aug/2011 17:27:29] "GET /static/raphael-min.js HTTP/1.1" 304 -
127.0.0.1 - - [17/Aug/2011 17:27:29] "GET /static/ivtl.css HTTP/1.1" 304 -
127.0.0.1 - - [17/Aug/2011 17:27:29] "GET /favicon.ico HTTP/1.1" 404 -
# of groups in session = 5
127.0.0.1 - - [17/Aug/2011 17:27:31] "GET /viewgroup/DeviceInformation HTTP/1.1" 200 -
我需要所有57个团体留下来。任何提示?
答案 0 :(得分:8)
数据太大而无法序列化到会话中。现在,我将一个密钥生成一个全局字典并将该密钥存储在会话中。
gXmlData[path] = groups
有一个问题是,全局字典会随着越来越多的密钥而永远存在,但这个过程并不意味着长寿。
答案 1 :(得分:0)
也许你的数据太大了。
如果您的数据大于 4KB,则需要服务器端会话。看看Flask-Session。