django-pipeline - 页面加载速度很慢

时间:2015-01-30 15:37:36

标签: python django django-staticfiles django-pipeline

我正在尝试使用django-pipeline来缩小静态资源,为它们使用缓存并使我的模板更简单。我的浏览器找到并加载了我的CSS和JS文件,但我的(非常简单的)主页加载大约需要10秒钟。

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我正在使用Python 2.7.6,Django 1.7.3和django-pipeline 1.4.3。 PyCharm使用本地virtualenv运行开发服务器。

我的settings.py包含以下内容:

DEBUG = True
TEMPLATE_DEBUG = DEBUG

INSTALLED_APPS = (
    'django_admin_bootstrapped', # custom admin
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    # pip installed apps
    'pipeline',
    # project apps
    'myapp',
)

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'pipeline.middleware.MinifyHTMLMiddleware',
)

STATICFILES_FINDERS = (
    'django.contrib.staticfiles.finders.FileSystemFinder',
    'django.contrib.staticfiles.finders.AppDirectoriesFinder',
    'pipeline.finders.FileSystemFinder',
    'pipeline.finders.CachedFileFinder',
    'pipeline.finders.PipelineFinder',
)

STATICFILES_STORAGE = 'pipeline.storage.PipelineCachedStorage'

STATIC_URL = '/static/'
STATIC_ROOT = os.path.join(BASE_DIR, 'static')

STATICFILES_DIRS = (
    os.path.join(BASE_DIR, 'myapp/static'),
)

STATICFILES_STORAGE = 'pipeline.storage.PipelineCachedStorage'
PIPELINE_CSS_COMPRESSOR = 'pipeline.compressors.yuglify.YuglifyCompressor'
PIPELINE_JS_COMPRESSOR = 'pipeline.compressors.yuglify.YuglifyCompressor'

PIPELINE_CSS = {
    'base': {
        'source_filenames': (
            'myapp/css/base.css',
            'myapp/bower_components/bootstrap/dist/css/bootstrap.css',
            'myapp/bower_components/Hover/css/hover.css',
            'myapp/bower_components/font-awesome/css/font-awesome.css',
        ),
        'output_filename': 'css/myapp.css',
    },
}

PIPELINE_JS = {
    'base': {
        'source_filenames': (
            'myapp/bower_components/jquery/dist/jquery.min.js',
            'myapp/bower_components/bootstrap/dist/js/bootstrap.min.js',
        ),
        'output_filename': 'js/myapp.js',
    },
}

我的基本HTML模板包含以下内容:

{% load staticfiles %}
{% load pipeline %}

<!DOCTYPE html>
<html>
    <head>
        [...]
        {% block css %}
            {% stylesheet 'base' %}
        {% endblock css %}

        {% block javascript %}
            {% javascript 'base' %}
        {% endblock javascript %}

    </head>
    <body> [...] </body>
</html>

我的home.html扩展了base.html但不使用css或javascript管道的模板标记。

只是为了确保yuglify可用:

$ yuglify --version
0.1.4

我在这里做错了什么?

注意:如果PIPELINE_ENABLED = True,浏览器找不到静态资源(myapp.css和myapp.js)。

1 个答案:

答案 0 :(得分:1)

问题是模板标记代码正在做一堆事情,包括当debug为True时为每个请求运行collectstatic,这使得开发速度非常慢。即使debug为False,templatetag仍会连接并查询S3以获取多项内容。当文件是本地文件时,这不是一个(大)问题,但是当使用S3时它就是。我能提出的唯一解决方案是编写自己的简化模板标签pipelines.py

在你进入它之前,你需要知道两个重要的事情,首先是让管道工作我有一个空的shell S3PipelineStorage,它结合了管道和boto,你可能已经有了这个,如果你有s3 +管道工作,但它很重要:

from pipeline.storage import PipelineMixin
from storages.backends.s3boto import S3BotoStorage

class S3PipelineStorage(PipelineMixin, S3BotoStorage):
    pass

然后在设置中:

STATICFILES_STORAGE = 'path.to.your.file.S3PipelineStorage'

现在,如果您向下看模板标签,您会看到我使用与原始模板标签类似的staticfiles_storage.url。这会将s3路径添加到相对路径,但如果您不添加此设置,则每次都会查询S3以生成URL。你可以添加设置或只是硬编码你的s3路径而不是staticfiles_storage.url但是我建议你添加设置,因为它会提高为s3资源生成URL的性能。

AWS_S3_CUSTOM_DOMAIN = 'your_bucket-%s.s3.amazonaws.com' % ENVIRONMENT.lower()

现在您已准备好使用templatetag。要仅使用{% load pipelines %}代替{% load pipeline %}

from django.contrib.staticfiles.storage import staticfiles_storage
from django import template
from django.template.loader import render_to_string
from django.utils.safestring import mark_safe
from pipeline.conf import settings

register = template.Library()

@register.simple_tag
def stylesheet(group):

    if group not in settings.PIPELINE_CSS:
        return ''

    if settings.DEBUG is False or settings.PIPELINE_ENABLED is True:
        context = {
            'type': 'text/css',
            'url': mark_safe(staticfiles_storage.url(settings.PIPELINE_CSS[group]['output_filename']))
        }
        html = render_to_string("pipeline/css.html", context)
    else:
        html = ''
        for path in settings.PIPELINE_CSS[group]['source_filenames']:
            context = {
                'type': 'text/css',
                'url': mark_safe(staticfiles_storage.url(path))
            }
            html = "%s\n        %s" % (html, render_to_string("pipeline/css.html", context))

    return html

@register.simple_tag
def javascript(group):

    if group not in settings.PIPELINE_JS:
        return ''

    if settings.DEBUG is False or settings.PIPELINE_ENABLED is True:
        context = {
            'type': 'text/javascript',
            'url': mark_safe(staticfiles_storage.url(settings.PIPELINE_JS[group]['output_filename']))
        }
        html = render_to_string("pipeline/js.html", context)
    else:
        html = ''
        for path in settings.PIPELINE_JS[group]['source_filenames']:
            context = {
                'type': 'text/javascript',
                'url': mark_safe(staticfiles_storage.url(path))
            }
            html = "%s\n        %s" % (html, render_to_string("pipeline/js.html", context))

    return html