2

我将所有图像都存储在项目中的某个文件夹中,例如媒体,并且我在 html 模板中有一个按钮,应该下载相应的图像。

以下是我的代码

视图.py

@login_required
def download_image(request, product_id):
    import os
    # current_site = get_current_site(request)
    product_image =  Product.objects.get(id=product_id)
    product_image_url = product_image.image_code_url()
    print product_image_url, ">>>>>>>>>>>>>>>"
    response = HttpResponse(mimetype='application/force-download')
    response['X-Sendfile'] = smart_str(product_image_url)
    response['Content-Length'] = os.stat(product_image_url).st_size

    return response  

模板.html

<input type=button><a href="{% url 'download_image' product_id%}"></a>/>

结果

/media/productb7ab/product792f2764314f40b8bd3b3d58290765cc/codes/Image_1.png  >>>>>>>>>>>>>>>
ERROR 2013-10-25 18:46:21,192 (base) (7258, -1248855232): Internal Server Error: /download/code/88/
Traceback (most recent call last):
  .......
  .......
  OSError: [Errno 2] No such file or directory: '/media/productb7ab/product792f2764314f40b8bd3b3d58290765cc/codes/Image_1.png'

但是当我点击类似的网址时localhost:8000/media/productb7ab/product792f2764314f40b8bd3b3d58290765cc/codes/Image_1.png,我可以查看图像,

那么最后如何从 django 的文件系统中下载图像?

我在上面的代码中做错了什么?

编辑

阅读分享的建议链接后Brandon

我已将上述方法修改为以下代码,但我仍然面临同样的错误

从 django.core.servers.basehttp 导入 FileWrapper

@login_required
def downloadimage(request, product_id):
    import os
    # current_site = get_current_site(request)
    image_code =  Product.objects.get(object_id=product_id)
    image_code_url = image_code.image_code_url()
    print image_code_url,">>>>>>>>>>>>>>"
    wrapper = FileWrapper(file(image_code_url))
    response = HttpResponse(wrapper, content_type='text/plain')
    response['Content-Disposition'] = 'attachment; filename=%s' % os.path.basename(image_code_url)
    response['Content-Length'] = os.path.getsize(image_code_url)
    return response

错误

Error:IOError at /download/code/88/
[Errno 2] No such file or directory: '/media/productrbab/product792f2764314f40b8bd3b3d58290765cc/codes/Image_1.png'
Request Method: GET
Request URL:    http://localhost:8000/download/qrcode/88/
Django Version: 1.5.4
Exception Type: IOError
Exception Value:    
[Errno 2] No such file or directory: '/media/productrbab/product792f2764314f40b8bd3b3d58290765cc/codes/Image_1.png'
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1 回答 1

1

为什么不在上一个视图中设置 url:

image_url = Product.objects.get(...).image_code_url()

然后在您的模板中放置一个普通链接:

<a href="{{ image_url }}">Download</a>

注意:在更大的系统中通过 Django 提供文件会导致效率低下 - 最好通过简单的 HTTP 服务器(Apache 或 Nginx)来提供文件。更多关于django 文档中的媒体管理。

于 2013-10-25T19:45:42.953 回答