"301 Moved", Google APIs with Opera - google-api

Question

In my web app I'm making a CURL call to Google's (unofficial) weather API at:
http://www.google.com/ig/api?weather=,,, ...
This works fine in all cases except when the page involved is accessed in Opera. When accessed in Opera, instead of the weather I get the following in the xml response:
301 Moved</H1>
The document has moved
here.
How can I fix this? I've seen some suggestions around the web that clearing the cache is a solution, but that hasn't worked for me. Note I'm particularly concerned with Opera Mini.
Thanks a lot.

Answer 1

Update 2012-06-20: Tested with Opera 12 and Google has fixed the sniffing issue it seems.
I do not think you can fix it. It would be interesting to know why Google does server-side user agent sniffing and redirects Opera to another URI. Could you paste the full weather URI, so we can test it at Opera ourselves? If do a get of the one you have given into Opera I get
<xml_api_reply version="1">
<weather module_id="0" tab_id="0" mobile_row="0" mobile_zipped="1" row="0" section="0">
<problem_cause data=""/>
</weather>
</xml_api_reply>
I also do not get a redirection, but I guess it is because the URI is not the one you have used.
% curl -sI "http://www.google.com/ig/api?weather=,,,"
HTTP/1.1 200 OK
Content-Type: text/xml; charset=ISO-8859-1
Date: Fri, 02 Mar 2012 12:04:44 GMT
Pragma: no-cache
Expires: Fri, 01 Jan 1990 00:00:00 GMT
Cache-Control: no-cache, no-store, must-revalidate
Set-Cookie: PREF=ID=fe13590e95ceb98e:TM=1330689884:LM=1330689884:S=h1eocRzhNcZ_Kwoa; expires=Sun, 02-Mar-2014 12:04:44 GMT; path=/; domain=.google.com
X-Content-Type-Options: nosniff
Server: igfe
X-XSS-Protection: 1; mode=block
Transfer-Encoding: chunked
More details will help, and I will complete here.
Update 2012-03-12 First I tried with a simple curl.
→ curl -sI "http://www.google.com/ig/api?weather=,,,40735500,-73986500"
HTTP/1.1 200 OK
Content-Type: text/xml; charset=ISO-8859-1
Date: Mon, 12 Mar 2012 13:16:43 GMT
Pragma: no-cache
Expires: Fri, 01 Jan 1990 00:00:00 GMT
Cache-Control: no-cache, no-store, must-revalidate
Set-Cookie: PREF=ID=9bc71bbf2edb7ebb:TM=1331558203:LM=1331558203:S=K5Ew69E5IsYhA0s8; expires=Wed, 12-Mar-2014 13:16:43 GMT; path=/; domain=.google.com
X-Content-Type-Options: nosniff
Server: igfe
X-XSS-Protection: 1; mode=block
Transfer-Encoding: chunked
Then with Opera User agent.
→ curl -sI -A "Opera/9.80 (Macintosh; Intel Mac OS X 10.7.3; U; fr) Presto/2.10.229 Version/11.61" "http://www.google.com/ig/api?weather=,,,40735500,-73986500"
HTTP/1.1 200 OK
Content-Type: text/xml; charset=UTF-8
Date: Mon, 12 Mar 2012 13:17:47 GMT
Pragma: no-cache
Expires: Fri, 01 Jan 1990 00:00:00 GMT
Cache-Control: no-cache, no-store, must-revalidate
Set-Cookie: PREF=ID=54cc62619394059e:TM=1331558267:LM=1331558267:S=JRCO-WNJMUNMMHsO; expires=Wed, 12-Mar-2014 13:17:47 GMT; path=/; domain=.google.com
X-Content-Type-Options: nosniff
Server: igfe
X-XSS-Protection: 1; mode=block
Transfer-Encoding: chunked
And finally with Firefox User Agent
→ curl -sI -A "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:9.0) Gecko/20100101 Firefox/9.0" "http://www.google.com/ig/api?weather=,,,40735500,-73986500"
HTTP/1.1 200 OK
Content-Type: text/xml; charset=UTF-8
Date: Mon, 12 Mar 2012 13:20:09 GMT
Pragma: no-cache
Expires: Fri, 01 Jan 1990 00:00:00 GMT
Cache-Control: no-cache, no-store, must-revalidate
Set-Cookie: PREF=ID=ab709995945767a8:TM=1331558409:LM=1331558409:S=bom-8pa-x9gGY5Sb; expires=Wed, 12-Mar-2014 13:20:09 GMT; path=/; domain=.google.com
X-Content-Type-Options: nosniff
Server: igfe
X-XSS-Protection: 1; mode=block
Transfer-Encoding: chunked
There is a no X-Content-Type-Options: nosniff in all cases and no redirection. What is the user agent you are using. You can type about:opera in the addressbar and the user agent string will appear.