| -rw-r--r-- | lib/discovery.cc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/discovery.cc b/lib/discovery.cc index bc7d6fb..81727c0 100644 --- a/lib/discovery.cc +++ b/lib/discovery.cc @@ -1,382 +1,388 @@ #include <list> #include <opkele/curl.h> #include <opkele/expat.h> #include <opkele/uris.h> #include <opkele/discovery.h> #include <opkele/exception.h> #include <opkele/util.h> #include "config.h" #define XRDS_HEADER "X-XRDS-Location" #define CT_HEADER "Content-Type" namespace opkele { using std::list; using xrd::XRD_t; using xrd::service_t; static const char *whitespace = " \t\r\n"; static const char *i_leaders = "=@+$!("; static inline bool is_qelement(const XML_Char *n,const char *qen) { return !strcasecmp(n,qen); } static inline bool is_element(const XML_Char *n,const char *en) { if(!strcasecmp(n,en)) return true; int nl = strlen(n), enl = strlen(en); if( (nl>=(enl+1)) && n[nl-enl-1]=='\t' && !strcasecmp(&n[nl-enl],en) ) return true; return false; } static long element_priority(const XML_Char **a) { for(;*a;++a) if(!strcasecmp(*(a++),"priority")) { long rv; return (sscanf(*a,"%ld",&rv)==1)?rv:-1; } return -1; } class idigger_t : public util::curl_t, public util::expat_t { public: string xri_proxy; enum { xmode_html = 1, xmode_xrd = 2 }; 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; pt_stack_t pt_stack; int skipping; XRD_t *xrd; service_t *xrd_service; string* cdata; idigger_t() : util::curl_t(easy_init()), 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 discover(idiscovery_t& result,const string& identity) { result.clear(); string::size_type fsc = identity.find_first_not_of(whitespace); if(fsc==string::npos) throw bad_input(OPKELE_CP_ "whtiespace-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); if(strchr(i_leaders,id[0])) { result.normalized_id = id; result.xri_identity = true; /* TODO: further canonicalize xri identity? Like folding case or whatever... */ discover_at( result, xri_proxy + util::url_encode(id)+ "?_xrd_r=application/xrd+xml;sep=false", xmode_xrd); if(status_code!=100) throw failed_xri_resolution(OPKELE_CP_ "XRI resolution failed with '"+status_string+"' message",status_code); if(result.xrd.canonical_ids.empty()) throw opkele::failed_discovery(OPKELE_CP_ "No CanonicalID for XRI identity found"); result.canonicalized_id = result.xrd.canonical_ids.begin()->second; }else{ result.xri_identity = false; if(id.find("://")==string::npos) id.insert(0,"http://"); string::size_type fp = id.find('#'); if(fp!=string::npos) { string::size_type qp = id.find('?'); if(qp==string::npos || qp<fp) id.erase(fp); else if(qp>fp) id.erase(fp,qp-fp); } result.normalized_id = util::rfc_3986_normalize_uri(id); discover_at(result,id,xmode_html|xmode_xrd); const char * eu = 0; CURLcode r = easy_getinfo(CURLINFO_EFFECTIVE_URL,&eu); if(r) throw exception_curl(OPKELE_CP_ "failed to get CURLINFO_EFFECTIVE_URL",r); result.canonicalized_id = util::rfc_3986_normalize_uri(eu); /* XXX: strip fragment part? */ if(xrds_location.empty()) { html2xrd(result.xrd); }else{ discover_at(result,xrds_location,xmode_xrd); if(result.xrd.empty()) html2xrd(result.xrd); } } } void discover_at(idiscovery_t& result,const string& url,int xm) { CURLcode r = easy_setopt(CURLOPT_URL,url.c_str()); if(r) throw exception_curl(OPKELE_CP_ "failed to set culry urlie",r); (*(expat_t*)this) = parser_create_ns(); set_user_data(); set_element_handler(); set_character_data_handler(); http_content_type.clear(); xmode = xm; if(xmode&xmode_html) { xrds_location.clear(); html_openid1.clear(); html_openid2.clear(); } xrd = &result.xrd; cdata = 0; xrd_service = 0; skipping = 0; status_code = 100; status_string.clear(); r = easy_perform(); if(r && r!=CURLE_WRITE_ERROR) throw exception_curl(OPKELE_CP_ "failed to perform curly request",r); parse(0,0,true); } void html2xrd(XRD_t& x) { if(!html_openid1.uris.empty()) { html_openid1.types.insert(STURI_OPENID11); x.services.add(-1,html_openid1); } if(!html_openid2.uris.empty()) { html_openid2.types.insert(STURI_OPENID20); x.services.add(-1,html_openid2); } } size_t write(void *p,size_t s,size_t nm) { if(skipping<0) return 0; /* TODO: limit total size */ size_t bytes = s*nm; parse((const char *)p,bytes,false); return bytes; } size_t header(void *p,size_t s,size_t nm) { size_t bytes = s*nm; const char *h = (const char*)p; const char *colon = (const char*)memchr(p,':',bytes); const char *space = (const char*)memchr(p,' ',bytes); if(space && ( (!colon) || space<colon ) ) { xrds_location.clear(); http_content_type.clear(); }else if(colon) { const char *hv = ++colon; int hnl = colon-h; int rb; for(rb = bytes-hnl-1;rb>0 && isspace(*hv);++hv,--rb); while(rb>0 && isspace(hv[rb-1])) --rb; if(rb) { if( (hnl>=sizeof(XRDS_HEADER)) && !strncasecmp(h,XRDS_HEADER":", sizeof(XRDS_HEADER)) ) { xrds_location.assign(hv,rb); }else if( (hnl>=sizeof(CT_HEADER)) && !strncasecmp(h,CT_HEADER":", sizeof(CT_HEADER)) ) { const char *sc = (const char*)memchr( hv,';',rb); http_content_type.assign(hv,sc?(sc-hv):rb); } } } return curl_t::header(p,s,nm); } void start_element(const XML_Char *n,const XML_Char **a) { if(skipping<0) return; if(skipping) { if(xmode&xmode_html) html_start_element(n,a); ++skipping; return; } if(pt_stack.empty()) { if(is_qelement(n,NSURI_XRDS "\tXRDS")) return; if(is_qelement(n,NSURI_XRD "\tXRD")) { assert(xrd); xrd->clear(); pt_stack.push_back(n); }else if(xmode&xmode_html) { html_start_element(n,a); }else{ skipping = -1; } }else{ int pt_s = pt_stack.size(); if(pt_s==1) { if(is_qelement(n,NSURI_XRD "\tCanonicalID")) { assert(xrd); cdata = &(xrd->canonical_ids.add(element_priority(a),string())); }else if(is_qelement(n,NSURI_XRD "\tLocalID")) { assert(xrd); cdata = &(xrd->local_ids.add(element_priority(a),string())); + }else if(is_qelement(n,NSURI_XRD "\tProviderID")) { + assert(xrd); + cdata = &(xrd->provider_id); }else if(is_qelement(n,NSURI_XRD "\tService")) { assert(xrd); xrd_service = &(xrd->services.add(element_priority(a), service_t())); pt_stack.push_back(n); }else if(is_qelement(n,NSURI_XRD "\tStatus")) { for(;*a;) { if(!strcasecmp(*(a++),"code")) { if(sscanf(*(a++),"%ld",&status_code)==1 && status_code!=100) { cdata = &status_string; pt_stack.push_back(n); break; } } } }else if(is_qelement(n,NSURI_XRD "\tExpires")) { assert(xrd); cdata_buf.clear(); cdata = &cdata_buf; }else if(xmode&xmode_html) { html_start_element(n,a); }else{ skipping = 1; } }else if(pt_s==2) { if(is_qelement(pt_stack.back().c_str(), NSURI_XRD "\tService")) { if(is_qelement(n,NSURI_XRD "\tType")) { assert(xrd); assert(xrd_service); cdata_buf.clear(); cdata = &cdata_buf; }else if(is_qelement(n,NSURI_XRD "\tURI")) { assert(xrd); assert(xrd_service); cdata = &(xrd_service->uris.add(element_priority(a),string())); }else if(is_qelement(n,NSURI_XRD "\tLocalID") || is_qelement(n,NSURI_OPENID10 "\tDelegate") ) { assert(xrd); assert(xrd_service); cdata = &(xrd_service->local_ids.add(element_priority(a),string())); + }else if(is_qelement(n,NSURI_XRD "\tProviderID")) { + assert(xrd); assert(xrd_service); + cdata = &(xrd_service->provider_id); }else{ skipping = 1; } }else skipping = 1; }else if(xmode&xmode_html) { html_start_element(n,a); }else{ skipping = 1; } } } void end_element(const XML_Char *n) { if(skipping<0) return; if(skipping) { --skipping; return; } if(is_qelement(n,NSURI_XRD "\tType")) { assert(xrd); assert(xrd_service); assert(cdata==&cdata_buf); xrd_service->types.insert(cdata_buf); }else if(is_qelement(n,NSURI_XRD "\tService")) { assert(xrd); assert(xrd_service); assert(!pt_stack.empty()); assert(pt_stack.back()==(NSURI_XRD "\tService")); pt_stack.pop_back(); xrd_service = 0; }else if(is_qelement(n,NSURI_XRD "\tStatus")) { assert(xrd); if(is_qelement(pt_stack.back().c_str(),n)) { assert(cdata==&status_string); pt_stack.pop_back(); if(status_code!=100) skipping = -1; } }else if(is_qelement(n,NSURI_XRD "\tExpires")) { assert(xrd); xrd->expires = util::w3c_to_time(cdata_buf); }else if((xmode&xmode_html) && is_element(n,"head")) { skipping = -1; } cdata = 0; } void character_data(const XML_Char *s,int l) { if(skipping) return; if(cdata) cdata->append(s,l); } void html_start_element(const XML_Char *n,const XML_Char **a) { if(is_element(n,"meta")) { bool heq = false; string l; for(;*a;a+=2) { if(!( strcasecmp(a[0],"http-equiv") || strcasecmp(a[1],XRDS_HEADER) )) heq = true; else if(!strcasecmp(a[0],"content")) l.assign(a[1]); } if(heq) xrds_location = l; }else if(is_element(n,"link")) { string rels; string href; for(;*a;a+=2) { if( !strcasecmp(a[0],"rel") ) { rels.assign(a[1]); }else if( !strcasecmp(a[0],"href") ) { const char *ns = a[1]; for(;*ns && isspace(*ns);++ns); href.assign(ns); string::size_type lns=href.find_last_not_of(whitespace); href.erase(lns+1); } } for(string::size_type ns=rels.find_first_not_of(whitespace); ns!=string::npos; ns=rels.find_first_not_of(whitespace,ns)) { string::size_type s = rels.find_first_of(whitespace,ns); string rel; if(s==string::npos) { rel.assign(rels,ns,string::npos); ns = string::npos; }else{ rel.assign(rels,ns,s-ns); ns = s; } if(rel=="openid.server") html_openid1.uris.add(-1,href); else if(rel=="openid.delegate") html_openid1.local_ids.add(-1,href); else if(rel=="openid2.provider") html_openid2.uris.add(-1,href); else if(rel=="openid2.local_id") html_openid2.local_ids.add(-1,href); } }else if(is_element(n,"body")) { skipping = -1; } } }; void idiscover(idiscovery_t& result,const string& identity) { idigger_t idigger; idigger.discover(result,identity); } } |