401 - authorisation error. you can't just request urls.

http://code.google.com/apis/books/docs/gdata/reference.html#ResponseCodes

Okay thanks for the tip. Upon looking at the authentication documentation, i'm a bit stumped. is there a simple way of doing this from within processing? thanks again.

Yes, Google doesn't like much direct raw accesses to their servers. This have been raised before in the old forum. IIRC, it wants a user-agent, at least for the Google search. Providing referers and perhaps even cookies might be required in some cases.

Found back the thread I saw: http://processing.org/discourse/yabb2/YaBB.pl?num=1263989874

thank you for your responses.

i've managed to create a ClientLogin authentication key but i can't figure out how to use it download an image.
the problem is that HttpURLConnection allows for authentication, but loadImage or requestImage use a String as arguments.

basically all i want is to be able to display in processing the image from a google book url such as
http://bks7.books.google.com/books?id=sfW6wrHiDnQC&printsec=frontcover&img=1&zoom=5&edge=curl&sig

any more help would be appreciated!

Hello guess,

How do you access to the google book API ?
Are you using the google book java client library, any third party library or core processing code ?

ClientLogin succesfull response gives you three parameters (SID, LSID & AUTH).
You should extract auth's value (which is a long random string) and set it in your request header.

I can't help you that much without additional infos.
Do you have any sample code ?

hello anchnk,

i'm actually trying to get images from google patents (which returns images from the books.google.com server) but i haven't been able to figure out if i can use a java client library with google patents (which is what i would really like to do). so i've been using a simple restful interface.

to get the authentication key i use modified (a bit long to post here) code from this link - http://code.google.com/apis/base/samples/java/InsertExample.java which gives me the key.

but i don't exactly know how to put the key (auth) and send it in a request header before calling loadImage or requestImage...

is it something like this ?

            HttpURLConnection connection = (HttpURLConnection)(url).openConnection();
           
            connection.setDoInput(true);
            connection.setDoOutput(true);
           
            connection.setRequestMethod("GET");
            connection.setRequestProperty("Content-Type", "application/atom+xml");
            connection.setRequestProperty("Authorization", "GoogleLogin auth=" + token);
            connection.setRequestProperty("X-Google-Key", "key=" + DEVELOPER_KEY);

where token is the auth key?

i've tried all sorts of things on and off for a couple of days and can't seem to find a solution..

thanks again.

Hey guess,

Sorry, i've not much time right now to give it a try but should be something like this.

Have you looked at Google book api java library & ClientLogin for installed Apps ??

That might help you.
Tell me if not, i'll try to help asap.

hello anchnk,

thanks again. i installed gdata-java-client but i still end up with the same problem.

the client works for textual data but the moment i try to do this

bigImage = requestImage("http://bks7.books.google.com/books?id=sfW6wrHiDnQC&printsec=frontcover&img=1&zoom=5&edge=curl&sig", "png");

i get the same 401 error

"The file "http://bks7.books.google.com/books?id=sfW6wrHiDnQC&printsec=frontcover&img=1&zoom=5&edge=curl&sig" is missing or inaccessible, make sure the URL is valid or that the file has been added to your sketch and is readable."

if you have time to take a look (i'm in no real hurry) it would be greatly appreciated.

hello anchnk,

thanks for your message. yes i did solve the problem using

            URL url= new URL(myurl);

            URLConnection urlConn = url.openConnection();
            urlConn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.21; Mac_PowerPC)" );
            urlConn.connect();
            InputStream urlStream = urlConn.getInputStream();

            BufferedImage b = ImageIO.read(urlStream);

works nicely although occasionally the image isn't totally downloaded in the BuffereredImage. i created another forum thread requesting help using a Mediatracker and BufferedImage and am hoping to find a response.