无法在 django 视图功能中使用 PIL

Question

我正在尝试制作一个生成图像缩略图的函数，但我无法打开图像文件。

def create_thumbnail(request):
    slug = 'yftguhjkn'
    post = get_object_or_404(Post, slug=slug)
    if post:
        markdownify = import_string(MARKDOWNX_MARKDOWNIFY_FUNCTION)
        content = BeautifulSoup(markdownify(post.content), "html5lib")
        try:
            img_link = content.findAll('img')[0].get('src')
            print(img_link)
            filename = img_link.split('/')[-1]
            filename = filename.split('.')[0]
            file_path = settings.MEDIA_URL + settings.DRACEDITOR_UPLOAD_PATH + post.author.username + '/' + filename + '.jpg'
            print (file_path)
            #im = Image.open(img_link)
            im = Image.open(file_path)
            print (im.size)
        except:
            img_link = 'http://howtorecordpodcasts.com/wp-content/uploads/2012/10/YouTube-Background-Pop-4.jpg'
        return HttpResponse(img_link)

但它会出现 except 声明。谁能告诉我如何解决它。

def create_thumbnail(request):
    slug = 'yftguhjkn'
    post = get_object_or_404(Post, slug=slug)
    if post:
        markdownify = import_string(MARKDOWNX_MARKDOWNIFY_FUNCTION)
        content = BeautifulSoup(markdownify(post.content), "html5lib")
        #try:
        img_link = content.findAll('img')[0].get('src')
        print(img_link)
        filename = img_link.split('/')[-1]
        filename = filename.split('.')[0]
        file_path = settings.MEDIA_URL + settings.DRACEDITOR_UPLOAD_PATH + post.author.username + '/' + filename + '.jpg'
        print (file_path)
        im = Image.open(file_path)
        print (im.size)
        #except:
            #img_link = 'http://howtorecordpodcasts.com/wp-content/uploads/2012/10/YouTube-Background-Pop-4.jpg'
        return HttpResponse(file_path)

Answer 1

我认为枕头需要一个正确的路径（完整路径）从图像中打开。

im = Image.open(file_path)

settings.MEDIA_URL 的共同输出是/media/ 对吗？ 所以，你需要file_path是完整路径，例如：

/home/myuser/myenv/myproject/media/images/uploads/2017/05/29/foobar.png

如果您的settings.MEDIA_ROOT 是：

/home/myuser/myenv/myproject/media

你可以这样做：

os.path.join(settings.MEDIA_ROOT, settings.DRACEDITOR_UPLOAD_PATH, image_name)
# example:
'/home/myuser/myenv/myproject/media' + 'images/uploads/2017/05/29/' + 'foobar.png'

您也可以使用BASE_DIR 作为绝对目录。