| -rw-r--r-- | lib/discovery.cc | 75 |
1 files changed, 64 insertions, 11 deletions
diff --git a/lib/discovery.cc b/lib/discovery.cc index 8729cfb..a308b56 100644 --- a/lib/discovery.cc +++ b/lib/discovery.cc @@ -1,29 +1,31 @@ #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 <opkele/tidy.h> #include <opkele/debug.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 const size_t max_html = 16384; 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' @@ -56,16 +58,18 @@ namespace opkele { 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; + bool parser_choked; + string save_html; XRD_t *xrd; service_t *xrd_service; string* cdata; idigger_t() : util::curl_t(easy_init()), util::expat_t(0), @@ -135,56 +139,105 @@ namespace opkele { } } 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; + prepare_to_parse(); if(xmode&xmode_html) { xrds_location.clear(); - html_openid1.clear(); html_openid2.clear(); + save_html.clear(); + save_html.reserve(max_html); } 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); + if(!parser_choked) { + parse(0,0,true); + }else{ + /* TODO: do not bother if we've seen xml */ + try { + util::tidy_doc_t td = util::tidy_doc_t::create(); + if(!td) + throw exception_tidy(OPKELE_CP_ "failed to create htmltidy document"); +#ifndef NDEBUG + td.opt_set(TidyQuiet,false); + td.opt_set(TidyShowWarnings,false); + td.opt_set(TidyForceOutput,true); + td.opt_set(TidyXhtmlOut,true); + td.opt_set(TidyDoctypeMode,TidyDoctypeOmit); + td.opt_set(TidyMark,false); +#endif /* NDEBUG */ + if(td.parse_string(save_html)<=0) + throw exception_tidy(OPKELE_CP_ "tidy failed to parse document"); + if(td.clean_and_repair()<=0) + throw exception_tidy(OPKELE_CP_ "tidy failed to clean and repair"); + util::tidy_buf_t tide; + if(td.save_buffer(tide)<=0) + throw exception_tidy(OPKELE_CP_ "tidy failed to save buffer"); + prepare_to_parse(); + parse(tide.c_str(),tide.size(),true); + }catch(exception_tidy& et) { } + } + save_html.clear(); + } + + void prepare_to_parse() { + (*(expat_t*)this) = parser_create_ns(); + set_user_data(); set_element_handler(); + set_character_data_handler(); + + if(xmode&xmode_html) { + html_openid1.clear(); html_openid2.clear(); + parser_choked = false; + } + + cdata = 0; xrd_service = 0; skipping = 0; + status_code = 100; status_string.clear(); } 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; - bool rp = parse((const char *)p,bytes,false); + 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; + save_html.append(inbuf,bts); + } + if(skipping<0) return bts; + } + if(skipping<0) return 0; + bool rp = parse(inbuf,bytes,false); if(!rp) { + parser_choked = true; skipping = -1; - bytes = 0; + if(!(xmode&xmode_html)) + bytes = 0; } 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); |