Rails - 如何从控制器发送图像
在我的 Rails 应用程序中，我需要传回图像。
我的路线中有一个 1x1.gif 跟踪像素，如下所示：
match "/_ctrack.gif" => "email_tracking_pixels#my_method"
在控制器中：
def my_method
send_data open('https://www.xxxxxx.com/images/1x1_transparent.gif') {|f| f.read }, :filename => '1x1_transparent.gif', :type => 'image/gif'
end
问题是由于某种原因有时会超时。出现以下错误：
2011-03-07T20:08:36-08:00 heroku[router]: Error H12 (Request timeout) -> GET www.xxxxxxx.com/images/1x1_transparent.gif dyno=web.1 queue=0 wait=0ms service=0ms bytes=0
2011-03-07T20:08:36-08:00 app[web.1]:
2011-03-07T20:08:36-08:00 app[web.1]: OpenURI::HTTPError (503 Service Unavailable):
2011-03-07T20:08:36-08:00 app[web.1]: app/controllers/email_tracking_pixels_controller.rb:19:in `my_method'
2011-03-07T20:08:36-08:00 app[web.1]: lib/rack/www.rb:7:in `call'
关于如何传递本地存储的图像，而不是必须使用 open 并进行网络调用回我自己的服务器，有什么想法吗？
谢谢
in my rails app, I need to pass back a image.
I have a 1x1.gif tracking pixel in my route as follows:
match "/_ctrack.gif" => "email_tracking_pixels#my_method"
In the controller:
def my_method
send_data open('https://www.xxxxxx.com/images/1x1_transparent.gif') {|f| f.read }, :filename => '1x1_transparent.gif', :type => 'image/gif'
end
The problem is that for some reason sometimes this times outs. with the following error:
2011-03-07T20:08:36-08:00 heroku[router]: Error H12 (Request timeout) -> GET www.xxxxxxx.com/images/1x1_transparent.gif dyno=web.1 queue=0 wait=0ms service=0ms bytes=0
2011-03-07T20:08:36-08:00 app[web.1]:
2011-03-07T20:08:36-08:00 app[web.1]: OpenURI::HTTPError (503 Service Unavailable):
2011-03-07T20:08:36-08:00 app[web.1]: app/controllers/email_tracking_pixels_controller.rb:19:in `my_method'
2011-03-07T20:08:36-08:00 app[web.1]: lib/rack/www.rb:7:in `call'
Any ideas on how I can pass this image that's stored locally, versus having to use open and make a web call back to my own server?
Thanks
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是否有原因导致您无法将文件保存到
public/_ctrack.gif、删除路由并让底层 Web 服务器提供图像？如果您需要处理磁盘中的图像，只需使用
open本地文件名：rb将文件设置为打开和二进制模式。Is there a reason that you cannot save the file to
public/_ctrack.gif, remove the route, and let the underlying web server serve the image?If you need to process the image from disk, just use
openon the local filename:The
rbsets the file toopenandbinarymodes.使用 send_file 不是更好吗？
Wouldn't be better to use send_file instead?