1 files changed, 35 insertions, 10 deletions

diff --git a/lib/discovery.cc b/lib/discovery.cc
index 6e20654..6f58339 100644
--- a/lib/discovery.cc
+++ b/lib/discovery.cc
@@ -19,25 +19,25 @@ namespace opkele {
     using xrd::service_t;
 
     /* TODO: the whole discovery thing needs cleanup and optimization due to
      * many changes of concept. */
 
     static const char *whitespace = " \t\r\n";
     static const char *i_leaders = "=@+$!(";
     static const size_t max_html = 16384;
 
     static const struct service_type_t {
         const char *uri;
         const char *forceid;
-    } service_types[] = {
+    } op_service_types[] = {
         { STURI_OPENID20_OP, IDURI_SELECT20 },
         { STURI_OPENID20, 0 },
         { STURI_OPENID11, 0 },
         { STURI_OPENID10, 0 }
     };
     enum {
         st_index_1 = 2, st_index_2 = 1
     };
 
 
     static inline bool is_qelement(const XML_Char *n,const char *qen) {
         return !strcasecmp(n,qen);
@@ -65,25 +65,26 @@ namespace opkele {
         for(;*a;++a)
             if(!strcasecmp(*(a++),at)) {
                 return *a;
             }
         return 0;
     }
 
     class idigger_t : public util::curl_t, public util::expat_t {
         public:
             string xri_proxy;
 
             enum {
-                xmode_html = 1, xmode_xrd = 2, xmode_cid = 4
+                xmode_html = 1, xmode_xrd = 2, xmode_cid = 4,
+                xmode_noredirs = 8
             };
             int xmode;
 
             string xrds_location;
             string http_content_type;
             service_t html_openid1;
             service_t html_openid2;
             string cdata_buf;
             long status_code;
             string status_string;
 
             typedef list<string> pt_stack_t;
@@ -101,45 +102,59 @@ namespace opkele {
                 util::expat_t(0),
                 xri_proxy(XRI_PROXY_URL) {
                     CURLcode r;
                     (r=misc_sets())
                         || (r=set_write())
                         || (r=set_header())
                         ;
                     if(r)
                         throw exception_curl(OPKELE_CP_ "failed to set curly options",r);
                 }
             ~idigger_t() throw() { }
 
+            void yadiscover(endpoint_discovery_iterator oi,const string& yurl,const char **types,bool redirs) {
+                idiscovery_t idis;
+                idis.xri_identity = false;
+                discover_at(idis,yurl,xmode_html|xmode_xrd|(redirs?0:xmode_noredirs));
+                if(!xrds_location.empty()) {
+                    idis.clear();
+                    discover_at(idis,xrds_location,xmode_xrd);
+                }
+                idis.normalized_id = idis.canonicalized_id = yurl;
+                service_type_t st;
+                for(st.uri=*types;*types;st.uri=*(++types))
+                    queue_endpoints(oi,idis,&st);
+            }
+
             string discover(endpoint_discovery_iterator& oi,const string& identity) {
                 string rv;
                 idiscovery_t idis;
                 string::size_type fsc = identity.find_first_not_of(whitespace);
                 if(fsc==string::npos)
                     throw bad_input(OPKELE_CP_ "whitespace-only identity");
                 string::size_type lsc = identity.find_last_not_of(whitespace);
                 assert(lsc!=string::npos);
                 if(!strncasecmp(identity.c_str()+fsc,"xri://",sizeof("xri://")-1))
                     fsc += sizeof("xri://")-1;
                 if((fsc+1)>=lsc)
                     throw bad_input(OPKELE_CP_ "not a character of importance in identity");
                 string id(identity,fsc,lsc-fsc+1);
                 idis.clear();
                 if(strchr(i_leaders,id[0])) {
                     /* TODO: further normalize xri identity? Like folding case
                      * or whatever... */
                     rv = id;
                     set<string> cids;
-                    for(const struct service_type_t *st=service_types;
-                            st<&service_types[sizeof(service_types)/sizeof(*service_types)];++st) {
+                    for(const struct service_type_t *st=op_service_types;
+                            st<&op_service_types[sizeof(op_service_types)/sizeof(*op_service_types)];++st) {
                         idis.clear();
                         discover_at( idis,
                                 xri_proxy + util::url_encode(id)+
                                 "?_xrd_t="+util::url_encode(st->uri)+
                                 "&_xrd_r=application/xrd%2Bxml"
                                 ";sep=true;refs=true",
                                 xmode_xrd );
                         if(status_code==241) continue;
                         if(status_code!=100)
                             throw failed_xri_resolution(OPKELE_CP_
                                     "XRI resolution failed with '"+status_string+"' message"
                                     ", while looking for SEP with type '"+st->uri+"'", status_code);
@@ -185,37 +200,39 @@ namespace opkele {
                     if(r)
                         throw exception_curl(OPKELE_CP_ "failed to get CURLINFO_EFFECTIVE_URL",r);
                     string cid = util::strip_uri_fragment_part( idis.canonicalized_id = util::rfc_3986_normalize_uri(eu) );
                     if(xrds_location.empty()) {
                         html2xrd(oi,idis);
                     }else{
                         idis.clear();
                         idis.canonicalized_id = cid;
                         discover_at(idis,xrds_location,xmode_xrd);
                         if(idis.xrd.empty())
                             html2xrd(oi,idis);
                         else{
-                            for(const service_type_t *st=service_types;
-                                    st<&service_types[sizeof(service_types)/sizeof(*service_types)];++st)
+                            for(const service_type_t *st=op_service_types;
+                                    st<&op_service_types[sizeof(op_service_types)/sizeof(*op_service_types)];++st)
                                 queue_endpoints(oi,idis,st);
                         }
                     }
                 }
                 return rv;
             }
 
             void discover_at(idiscovery_t& idis,const string& url,int xm) {
-                CURLcode r = easy_setopt(CURLOPT_URL,url.c_str());
+                CURLcode r = easy_setopt(CURLOPT_MAXREDIRS, (xm&xmode_noredirs)?0:5);
                 if(r)
-                    throw exception_curl(OPKELE_CP_ "failed to set culry urlie",r);
+                    throw exception_curl(OPKELE_CP_ "failed to set curly maxredirs option");
+                if( (r=easy_setopt(CURLOPT_URL,url.c_str())) )
+                    throw exception_curl(OPKELE_CP_ "failed to set curly urlie",r);
 
                 http_content_type.clear();
                 xmode = xm;
                 prepare_to_parse();
                 if(xmode&xmode_html) {
                     xrds_location.clear();
                     save_html.clear();
                     save_html.reserve(max_html);
                 }
                 xrd = &idis.xrd;
 
                 r = easy_perform();
@@ -263,30 +280,30 @@ namespace opkele {
                 }
 
                 cdata = 0; xrd_service = 0; skipping = 0;
                 pt_stack.clear();
                 status_code = 100; status_string.clear();
             }
 
             void html2xrd(endpoint_discovery_iterator& oi,idiscovery_t& id) {
                 XRD_t& x = id.xrd;
                 if(!html_openid2.uris.empty()) {
                     html_openid2.types.insert(STURI_OPENID20);
                     x.services.add(-1,html_openid2);
-                    queue_endpoints(oi,id,&service_types[st_index_2]);
+                    queue_endpoints(oi,id,&op_service_types[st_index_2]);
                 }
                 if(!html_openid1.uris.empty()) {
                     html_openid1.types.insert(STURI_OPENID11);
                     x.services.add(-1,html_openid1);
-                    queue_endpoints(oi,id,&service_types[st_index_1]);
+                    queue_endpoints(oi,id,&op_service_types[st_index_1]);
                 }
             }
 
             size_t write(void *p,size_t s,size_t nm) {
                 /* TODO: limit total size */
                 size_t bytes = s*nm;
                 const char *inbuf = (const char*)p;
                 if(xmode&xmode_html) {
                     size_t mbts = save_html.capacity()-save_html.size();
                     size_t bts = 0;
                     if(mbts>0) {
                         bts = (bytes>mbts)?mbts:bytes;
@@ -540,13 +557,21 @@ namespace opkele {
                         }
                     }
                 }
             }
 
     };
 
     string idiscover(endpoint_discovery_iterator oi,const string& identity) {
         idigger_t idigger;
         return idigger.discover(oi,identity);
     }
 
+    void yadiscover(endpoint_discovery_iterator oi,const string& yurl,const char **types,bool redirs) try {
+        idigger_t idigger;
+        idigger.yadiscover(oi,yurl,types,redirs);
+    }catch(exception_curl& ec) {
+        if(redirs || ec._error!=CURLE_TOO_MANY_REDIRECTS)
+            throw;
+    }
+
 }