Question

我一直在寻找有关如何编写Jinja代码的大量信息，并且有2个.py文件page1.py和page2.py引用.jinja个文件templates目录。当我运行python page1.py时，我准确地获得了我想要的网页。事实上，当我运行python page1.py > page1.html然后导航到myWebpage/page1.html时，它就能完美运行。

但是，我想知道，一旦我将myWebpage/page1.html输入浏览器，jinja应该（或可以）自动运行。问题是，一旦后端的参数发生变化，我就会使用Jinja自动更新页面。我是否需要使用cron运行此python代码，或者是否应该在用户刷新网页时生成新的.html代码？

以下是我的python和jinja页面的内容：

（1）/var/www/html/page1.py

的内容

#!/usr/bin/env python

### taken from http://kagerato.net/articles/software/libraries/jinja-quickstart.html
# Load the jinja library's namespace into the current module.
import jinja2

# In this case, we will load templates off the filesystem.
# This means we must construct a FileSystemLoader object.
# 
# The search path can be used to make finding templates by
#   relative paths much easier.  In this case, we are using
#   absolute paths and thus set it to the filesystem root.
templateLoader = jinja2.FileSystemLoader( searchpath="/usage_statistics/webfront" )

# An environment provides the data necessary to read and
#   parse our templates.  We pass in the loader object here.
templateEnv = jinja2.Environment( loader=templateLoader )

# This constant string specifies the template file we will use.
TEMPLATE_FILE = "templates/page1.jinja"

# Read the template file using the environment object.
# This also constructs our Template object.
template = templateEnv.get_template( TEMPLATE_FILE )

# Specify any input variables to the template as a dictionary.
templateVars = { "title" : "Test Example",
                 "description" : "A simple inquiry of function." }

# Finally, process the template to produce our final text.
outputText = template.render( templateVars )

print outputText

（2）/var/www/html/templates/page1.jinja

的内容

<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8" />

  <title>{{ title }}</title>
  <meta name="description" content="{{ description }}" />
</head>

<body>

<div id="content">
  <p>Why, hello there!</p>
</div>

</body>
</html>

（3）/var/www/html/page2.py

的内容

#!/usr/bin/env python
import jinja2

templateLoader = jinja2.FileSystemLoader( searchpath="/usage_statistics/webfront" )
env = jinja2.Environment( loader=templateLoader )

TEMPLATE_FILE = "templates/page2.jinja"
template = env.get_template( TEMPLATE_FILE )

# Here we add a new input variable containing a list.
# Its contents will be expanded in the HTML as a unordered list.
FAVORITES = [ "chocolates", "lunar eclipses", "rabbits" ]

templateVars = { "title" : "Test Example",
                 "description" : "A simple inquiry of function.",
                 "favorites" : FAVORITES
               }   

#outputText = template.render( templateVars )
#template.render( templateVars )
print template.render( templateVars )

（4）page2.jinja的内容

<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8" />

  <title>{{ title }}</title>
  <meta name="description" content="{{ description }}" />
</head>

<body>

<div id="content">
  <p>Greetings visitor!  These are a list of my favorite things:</p>

  <ul>
  {% for item in favorites %}
    <li>{{ item }}</li>
  {% endfor %}
  </ul>
</div>

</body>
</html>

使用Jinja进行html显示

0 个答案: