The obvious error is that I did not use the correct URL for the
library call. The not so obvious piece is that discogs wants the
header "Accept-Encoding: gzip" (but it ignores User-agent).

On 19 September 2011 12:42, Michael Wood <esiotrot_at_gmail.com> wrote:
> On 19 September 2011 11:33, John P. Hartmann <jphartmann_at_gmail.com> wrote:
>> Absolute beginner.  I must be missing something obvious.
>>
>> Typing 'http://api.discogs.com/artist/John+Coltrane' into netscape
>> gets me information on the saxofonist.
>
> Here you're using "api.discogs.com".
>
>> Sending the same URL with libcurl does not.  The first line is my log
>> of the parameter to curl_easy_setopt(curl, CURLOPT_URL, qry);:
>>
>> Query 'http://www.discogs.com/artist/John+Coltrane'
>
> Here you're using "www.discogs.com".
>
>> * About to connect() to www.discogs.com port 80 (#0)
>> *   Trying 70.103.226.22... * connected
>>> GET /artist/John+Coltrane HTTP/1.1
>> Host: www.discogs.com
>
> One other thing you might want to do is include a User-Agent header.
> Some web sites don't like it if you leave that out.
>
>> 500 Client Refused
>> * Connection #0 to host www.discogs.com left intact
>> * Closing connection #0
>>
>> Passing the URL to the curl command gets me a different error response:
>>
>> u@ubuntu:~$ curl 'http://api.discogs.com/artist/John+Coltrane'
>> {"resp": {"status": false, "version": "2.0", "error": "Invalid API
>> request"}}u_at_ubuntu:~$
>
> You could also try:
>
> curl 'http://api.discogs.com/artist/John+Coltrane' --libcurl discogs-example.c
>
> which will generate a file called discogs-example.c that should do the
> same thing as the "curl" command.
>
> --
> Michael Wood <esiotrot_at_gmail.com>
>
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Received on 2011-09-19