樱桃py自动下载文件 [英] cherry py auto download file
问题描述
我目前正在为我的项目构建Cherry py应用程序,并且在某些功能下,我需要自动开始下载文件.
I'm currently building cherry py app for my projects and at certain function I need auto starting download a file.
zip文件生成完毕后,我要开始下载到客户端因此,在创建图像后,将它们压缩并发送给客户端
After zip file finish generating, I want to start downloading to client So after images are created, they are zipped and sent to client
class Process(object):
exposed = True
def GET(self, id, norm_all=True, format_ramp=None):
...
def content(): #generating images
...
def zipdir(basedir, archivename):
assert os.path.isdir(basedir)
with closing(ZipFile(archivename, "w", ZIP_DEFLATED)) as z:
for root, dirs, files in os.walk(basedir):
#NOTE: ignore empty directories
for fn in files:
absfn = os.path.join(root, fn)
zfn = absfn[len(basedir)+len(os.sep):] #XXX: relative path
z.write(absfn, zfn)
zipdir("/data/images/8","8.zip")
#after zip file finish generating, I want to start downloading to client
#so after images are created, they are zipped and sent to client
#and I'm thinking do it here, but don't know how
return content()
GET._cp_config = {'response.stream': True}
def POST(self):
global proc
global processing
proc.kill()
processing = False
推荐答案
只需在内存中创建一个zip存档,然后使用 cherrypy.lib 中的
file_generator()
帮助函数将其返回即可.代码>.您也可以通过 yield
HTTP响应来启用流功能(请记住在执行此操作之前先设置HTTP标头).我为您编写了一个简单的示例(基于您的代码段),您只需返回
一个完整的缓冲zip归档文件即可.
Just create a zip archive in memory and then return it using file_generator()
helper function from cherrypy.lib
. You may as well yield
HTTP response to enable streaming capabilities (keep in mind to set HTTP headers prior to doing that).
I wrote a simple example (based on your snippet) for you just return
ing a whole buffered zip archive.
from io import BytesIO
import cherrypy
from cherrypy.lib import file_generator
class GenerateZip:
@cherrypy.expose
def archive(self, filename):
zip_archive = BytesIO()
with closed(ZipFile(zip_archive, "w", ZIP_DEFLATED)) as z:
for root, dirs, files in os.walk(basedir):
#NOTE: ignore empty directories
for fn in files:
absfn = os.path.join(root, fn)
zfn = absfn[len(basedir)+len(os.sep):] #XXX: relative path
z.write(absfn, zfn)
cherrypy.response.headers['Content-Type'] = (
'application/zip'
)
cherrypy.response.headers['Content-Disposition'] = (
'attachment; filename={fname}.zip'.format(
fname=filename
)
)
return file_generator(zip_archive)
我没有测试这段特定的代码,但是总体思路是正确的.
N.B. I didn't test this specific piece of code, but the general idea is correct.
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