发布照片从Heroku的Facebook的开放图谱，使用回报率，FbGraph宝石和S3 [英] Posting a photo to the Facebook Open Graph from Heroku, using RoR, FbGraph Gem, and S3

问题描述

我想允许用户分享他的Facebook墙上的照片。我用回形针来存储所有我的应用程序的照片在S3上。因此，在下面的例子@ photo.image.url是我要发布的some_album图像的S3网址。使用fb_graph宝石，这是在本地主机上相对容易。在我的控制器我有：

I am trying to allow a user to share a photo on his Facebook wall. I use Paperclip to store all of my app's photos on S3. So in the below example @photo.image.url is the S3 url of an image that I want to post in some_album. Using the fb_graph gem this is relatively easy on localhost. In my controller I have:

    the_photo = open(@photo.image.url)
    some_album.photo!(
      :access_token => access_token,
      :source => the_photo
    )

在localhost the_photo的类是将它视为档案。

the_photo's class on localhost is "Tempfile".

在Heroku的事情变得棘手。使用相同的code两（貌似相关的）事情发生。首先，the_photo是类类型StringIO的。其次，当FbGraph帖子给Facebook我得到以下错误：

On heroku things get tricky. Using the same code two (seemingly related) things happen. First, the_photo is class type "stringIO". Second when FbGraph posts to Facebook I get the following error:

FbGraph::InvalidRequest (OAuthException :: (#324) Requires upload file):

的事实，也可能帮助下面有几个要点：

Heres a few bullet points of facts that might also help:

• 的Heroku是一个只读的系统，但显然你的可以的写入它视为
• 在我on Rails的3.1.0
• 的Ruby 1.9.2
• 在Heroku的堆栈竹美里

• Heroku is a read only system, but apparently you can write to a Tempfile
• I am on Rails 3.1.0
• Ruby 1.9.2
• Heroku Stack Bamboo-Miri

任何帮助/想法/变通/问题将大大AP preciated。

Any help/thoughts/work arounds/questions would be greatly appreciated.

推荐答案

我不知道为什么这样做的伎俩，但这个工作对我来说：

I am not sure why this did the trick but this worked for me:

some_album.photo!(
  :access_token => access_token,
  :source => open(@photo.image.url)
)

而不是设置变量photo_response =打开（@ photo.image.url）。

as opposed to setting a variable photo_response = open(@photo.image.url).

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