Question

是否有可能在调试模式下写入有关模板生成的生成视图详细信息？例如，它可以生成这样的输出：

base.html文件：

<html>
<body>
{% block content %}
{% endblock %}
</body>
</html>

page.html中：

{% extend "base.html" %}
{% block content %}
Foo
{% include "inner.html" %}
Bar
{% endblock %}

进入这样的形式：

<html>
<body>
<!-- block content -->
<!-- from "page.html" -->
Foo
<!-- include "inner.html" -->
Bar
<!-- endblock content -->
</body>
</html>

为什么呢？因为有时只是通过IDE来探索一些更大的依赖项是非常困难的。或者您可能知道一些更好的工具，以便于导航（生成图表等）？当然，只应在调试模式下生成此信息。在生产中它们应该消失。

Answer 1

您可以使用middlware实现此目的。我有一个类似的问题，一段时间跟踪模板和调用它们的视图所以我写了一个中间件片段，在html响应的顶部添加了一个注释块。它并没有完全按照您的要求进行，但您可以对其进行调整。

COMMENT_BLOCK = """
<!--
[ url      ] >> http://%(host)s%(path)s
[ referer  ] >> %(referer)s
[ module   ] >> %(module)s
[ function ] >> %(function)s, line %(line)s
[ args     ] >> args=%(args)s, kwargs=%(kwargs)s, defaults=%(defaults)s
[ template ] >> %(template)s
-->

"""

# Add any additional template types you wish to add the comment block to.
MIMETYPES = (
    "text/html",
    "text/xml",
)


class HtmlTemplateFinder:

    def __init__(self):
        self.host = None
        self.referer = None
        self.path = None
        self.module = None
        self.function = None
        self.line = None
        self.args = None
        self.kwargs = None
        self.defaults = None
        self.template = None
        self.valid_template = False

    def _populate_comment_block(self):
        return COMMENT_BLOCK % {
                                'host': self.host,
                                'referer': self.referer,
                                'path': self.path,
                                'module': self.module,
                                'function': self.function,
                                'line': self.line,
                                'args': self.args,
                                'kwargs': self.kwargs,
                                'defaults': self.defaults,
                                'template': self.template,
                               }

    def process_view(self, request, view_func, view_args, view_kwargs):
        self.host = request.META.get('HTTP_HOST', None)
        self.referer = request.META.get('HTTP_REFERER', None)
        self.path = request.path
        self.module = view_func.func_code.co_filename
        self.function = ('.').join((view_func.__module__, view_func.func_name))
        self.line = view_func.func_code.co_firstlineno
        self.args = view_args
        self.kwargs = view_kwargs
        self.defaults = view_func.func_defaults
        return None

    def process_template_response(self, request, response):
        from mimetypes import guess_type
        # Use this rather than response.template_name, this always returns str
        self.template = response.resolve_template(response.template_name).name
        self.valid_template = guess_type(self.template)[0] in MIMETYPES
        return response

    def process_response(self, request, response):
        from <your app> import settings
        if settings.DEBUG:
            if self.valid_template:
                block = self._populate_comment_block()
                response.content = "%s%s" % (block, response.content)
        return response

Django模板标签中的详细模式

1 个答案: