如何使用 Django 流式传输 HttpResponse [英] How to stream an HttpResponse with Django
问题描述
我正在尝试为 Django (1.2) 获取流式响应的hello world".我想出了如何使用生成器和 yield 函数.但是响应仍然没有流式传输.我怀疑有一个中间件在处理它——也许是 ETAG 计算器?但我不确定如何禁用它.有人可以帮忙吗?
这是我到目前为止的hello world"流媒体:
def stream_response(request):resp = HttpResponse(stream_response_generator())返回响应def stream_response_generator():对于范围内的 x(1,11):yield "%s
" % x # 向浏览器返回一段响应时间.sleep(1)您可以使用 条件装饰器.这将使您的响应通过 HTTP 流回.您可以使用像 curl 这样的命令行工具来确认这一点.但这可能不足以让您的浏览器在流式传输时显示响应.为了鼓励浏览器在响应流时显示响应，您可以将一堆空格向下推入管道以强制填充其缓冲区.示例如下:
from django.views.decorators.http 导入条件@condition(etag_func=None)定义流响应(请求):resp = HttpResponse(stream_response_generator(), content_type='text/html')返回响应def stream_response_generator():产量 "
"对于范围内的 x(1,11):产量 "%s
" % xyield " " * 1024 # 鼓励浏览器增量渲染时间.sleep(1)产生</body></html>
"
I'm trying to get the 'hello world' of streaming responses working for Django (1.2). I figured out how to use a generator and the yield function. But the response still not streaming. I suspect there's a middleware that's mucking with it -- maybe ETAG calculator? But I'm not sure how to disable it. Can somebody please help?
Here's the "hello world" of streaming that I have so far:
def stream_response(request):
resp = HttpResponse( stream_response_generator())
return resp
def stream_response_generator():
for x in range(1,11):
yield "%s
" % x # Returns a chunk of the response to the browser
time.sleep(1)
You can disable the ETAG middleware using the condition decorator. That will get your response to stream back over HTTP. You can confirm this with a command-line tool like curl. But it probably won't be enough to get your browser to show the response as it streams. To encourage the browser to show the response as it streams, you can push a bunch of whitespace down the pipe to force its buffers to fill. Example follows:
from django.views.decorators.http import condition
@condition(etag_func=None)
def stream_response(request):
resp = HttpResponse( stream_response_generator(), content_type='text/html')
return resp
def stream_response_generator():
yield "<html><body>
"
for x in range(1,11):
yield "<div>%s</div>
" % x
yield " " * 1024 # Encourage browser to render incrementally
time.sleep(1)
yield "</body></html>
"
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