云存储-可以通过API检索对象，但是在尝试访问MediaLink时会出现奇怪的错误

Question

I am using golang on appengine (go version go1.2.1 (appengine-1.9.3) linux/386)

My new app is having trouble when trying to read a cloud storage file's contents. I can get the Object info via google-api-go-client, and the MediaLink gives me a URL like this:

https://www.googleapis.com/storage/v1beta2/b/bucket/o/profile%2Fpath_to_the_file.jpeg?generation=1402107955298000&alt=media

On dev_app_server or appengine, when I try to urlfetch this jpeg, I get "404 Not Found". When I paste the same URL into my browser, I get a 307 redirect, and then a 200 for a new URL that looks likes this:

https://storage.googleapis.com/bucket/profile%2Fpath_to_the_file.jpeg?generation=1402107955298000

I tried a test and just did a urlfetch request for first a www.googleapis.com URL, and then a storage.googleapis.com URL. The first URL gives a 404, but the second URL gives 200 OK. I have nearly identical code working in another app - why am I getting the false 404s in this instance?

Thanks, Tim.

Answer 1

Apparently this is an issue with how golang parses a URL string and translates it to a net/url struct. You can use the URL.Opaque field to work around this behavior. I didn't write this code, but here is an example of how googleapi addresses this same issue in order to preserve the %2F separators in the path.

http://play.golang.org/p/TkKRROJTfb