make canonicalize follow redirects

 - renamed old consumer_t::canonicalize to consumer_t::normalize
 - made the real canonicalize virtual to allow caching layer

1 files changed, 25 insertions, 1 deletions

diff --git a/lib/consumer.cc b/lib/consumer.cc
index 282f0cc..dd8e150 100644
--- a/lib/consumer.cc
+++ b/lib/consumer.cc
@@ -305,17 +305,17 @@ namespace opkele {
 	if(server.empty())
 	    throw failed_assertion(OPKELE_CP_ "The location has no openid.server declaration");
     }
 
     assoc_t consumer_t::find_assoc(const string& server) {
 	throw failed_lookup(OPKELE_CP_ "no find_assoc() provided");
     }
 
-    string consumer_t::canonicalize(const string& url) {
+    string consumer_t::normalize(const string& url) {
 	string rv = url;
 	// strip leading and trailing spaces
 	string::size_type i = rv.find_first_not_of(" \t\r\n");
 	if(i==string::npos)
 	    throw bad_input(OPKELE_CP_ "empty URL");
 	if(i)
 	    rv.erase(0,i);
 	i = rv.find_last_not_of(" \t\r\n");
@@ -337,9 +337,33 @@ namespace opkele {
 		rv.insert(qm,1,'/');
 	}else{
 	    if(sl==string::npos)
 		rv += '/';
 	}
 	return rv;
     }
 
+    string consumer_t::canonicalize(const string& url) {
+	string rv = normalize(url);
+	curl_t curl = curl_easy_init();
+	if(!curl)
+	    throw exception_curl(OPKELE_CP_ "failed to curl_easy_init()");
+	string html;
+	CURLcode r;
+	(r=curl_misc_sets(curl))
+	|| (r=curl_easy_setopt(curl,CURLOPT_URL,rv.c_str()))
+	|| (r=curl_easy_setopt(curl,CURLOPT_NOBODY,1))
+	;
+	if(r)
+	    throw exception_curl(OPKELE_CP_ "failed to curl_easy_setopt()",r);
+	r = curl_easy_perform(curl);
+	if(r)
+	    throw exception_curl(OPKELE_CP_ "failed to curl_easy_perform()",r);
+	const char *eu = 0;
+	r = curl_easy_getinfo(curl,CURLINFO_EFFECTIVE_URL,&eu);
+	if(r)
+	    throw exception_curl(OPKELE_CP_ "failed to curl_easy_getinfo(..CURLINFO_EFFECTIVE_URL..)",r);
+	rv = eu;
+	return normalize(rv);
+    }
+
 }