ÿØÿà JFIF    ÿÛ „  ( %"1!%)+...383,7(-.+  -+++--++++---+-+-----+---------------+---+-++7-----ÿÀ  ß â" ÿÄ     ÿÄ H    !1AQaq"‘¡2B±ÁÑð#R“Ò Tbr‚²á3csƒ’ÂñDS¢³$CÿÄ   ÿÄ %  !1AQa"23‘ÿÚ   ? ôÿ ¨pŸªáÿ —åYõõ\?àÒü©ŠÄï¨pŸªáÿ —åYõõ\?àÓü©ŠÄá 0Ÿªáÿ Ÿå[úƒ ú®ði~TÁbqÐ8OÕpÿ ƒOò¤Oè`–RÂáœá™êi€ßÉ< FtŸI“öÌ8úDf´°å}“¾œ6  öFá°y¥jñÇh†ˆ¢ã/ÃÐ:ªcÈ "Y¡ðÑl>ÿ ”ÏËte:qž\oäŠe÷󲍷˜HT4&ÿ ÓÐü6ö®¿øþßèô Ÿ•7Ñi’•j|“ñì>b…þS?*Óôÿ ÓÐü*h¥£ír¶ü UãSç‚Ÿ[AÐaè[ûª•õ&õj?†Éö+EzP—WeÒírJFt ‘BŒ†Ï‡%#tE Øz ¥OÛ«!1›üä±Í™%ºÍãö]°î(–:@<‹ŒÊö×òÆt¦ãº+‡¦%ÌÁ²h´OƒJŒtMÜ>ÀÜÊw3Y´•牋4ǍýʏTì>œú=Íwhyë,¾Ôò×õ¿ßÊa»«þˆѪQ|%6ž™A õ%:øj<>É—ÿ Å_ˆCbõ¥š±ý¯Ýƒï…¶|RëócÍf溪“t.СøTÿ *Ä¿-{†çàczůŽ_–^XþŒ±miB[X±d 1,é”zEù»& î9gœf™9Ð'.;—™i}!ôšåîqêÛ٤ёý£½ÆA–àôe"A$˝Úsäÿ ÷Û #°xŸëí(l »ý3—¥5m! rt`†0~'j2(]S¦¦kv,ÚÇ l¦øJA£Šƒ J3E8ÙiŽ:cÉžúeZ°€¯\®kÖ(79«Ž:¯X”¾³Š&¡* ….‰Ž(ÜíŸ2¥ª‡×Hi²TF¤ò[¨íÈRëÉ䢍mgÑ.Ÿ<öäS0í„ǹÁU´f#Vß;Õ–…P@3ío<ä-±»Ž.L|kªÀê›fÂ6@»eu‚|ÓaÞÆŸ…¨ááå>åŠ?cKü6ùTÍÆ”†sĤÚ;H2RÚ†õ\Ö·Ÿn'¾ ñ#ºI¤Å´%çÁ­‚â7›‹qT3Iï¨ÖÚ5I7Ë!ÅOóŸ¶øÝñØôת¦$Tcö‘[«Ö³šÒ';Aþ ¸èíg A2Z"i¸vdÄ÷.iõ®§)¿]¤À†–‡É&ä{V¶iŽ”.Ó×Õÿ û?h¬Mt–íª[ÿ Ñÿ ÌV(í}=ibÔ¡›¥¢±b Lô¥‡piη_Z<‡z§èŒ)iÖwiÇ 2hÙ3·=’d÷8éŽ1¦¸c¤µ€7›7Ø ð\á)} ¹fËí›pAÃL%âc2 í§æQz¿;T8sæ°qø)QFMð‰XŒÂ±N¢aF¨…8¯!U  Z©RÊ ÖPVÄÀÍin™Ì-GˆªÅËŠ›•zË}º±ŽÍFò¹}Uw×#ä5B¤{î}Ð<ÙD é©¤&‡ïDbàÁôMÁ." ¤‡ú*õ'VŽ|¼´Úgllº¼klz[Æüï÷Aób‡Eÿ dÑ»Xx9ÃÜ£ÁT/`¼¸vI±Ýµ·Ë‚“G³þ*Ÿû´r|*}<¨îºœ @¦mÄ’M¹”.œ«Y–|6ÏU¤jç¥ÕÞqO ˜kDÆÁ¨5ÿ š;Њ¦¦€GÙk \ –Þ=â¼=SͧµªS°ÚÍpÜãQűÀõ¬?ÃÁ1Ñ•õZà?hóœ€ L¦l{Y*K˜Ù›zc˜–ˆâ ø+¾ ­-Ök¥%ùEÜA'}ˆ><ÊIè“bpÍ/qÞâvoX€w,\úªò6Z[XdÒæ­@Ö—€$òJí#é>'°Ú ôª˜<)4ryÙ£|óAÅn5žêŸyÒäMÝ2{"}‰–¤l÷ûWX\l¾Á¸góÉOÔ /óñB¤f¸çñ[.P˜ZsÊË*ßT܈§QN¢’¡¨§V¼(Üù*eÕ“”5T¨‹Âê¥FŒã½Dü[8'Ò¥a…Ú¶k7a *•›¼'Ò·\8¨ª\@\õ¢¦íq+DÙrmÎ…_ªæ»ŠÓœ¡¯’Ré9MÅ×D™lælffc+ŒÑ,ý™ÿ ¯þǤ=Å’Á7µ÷ÚÛ/“Ü€ñýã¼àí¾ÕÑ+ƒ,uµMâÀÄbm:ÒÎPæ{˜Gz[ƒ¯«® KHà`ßØŠéí¯P8Aq.C‰ à€kòpj´kN¶qô€…Õ,ÜNŠª-­{Zö’æû44‰sŽè‰îVíRœÕm" 6?³D9¡ÇTíÅꋇ`4«¸ÝÁô ï’ýorqКÇZ«x4Žâéþuïf¹µö[P ,Q£éaX±`PÉÍZ ¸äYúg üAx ’6Lê‚xÝÓ*äQ  Ï’¨hÍ =²,6ï#rÃ<¯–£»ƒ‹,–ê•€ aÛsñ'%Æ"®ÛüìBᝠHÚ3ß°©$“XnœÖ’î2ËTeûìxîß ¦å¿çÉ ðK§þ{‘t‚Ϋ¬jéîZ[ ”š7L¥4VÚCE×]m¤Øy”ä4-dz£œ§¸x.*ãÊÊ b÷•h:©‡¦s`BTÁRû¾g⻩‹jø sF¢àJøFl‘È•Xᓁà~*j¯ +(ÚÕ6-£¯÷GŠØy‚<Ç’.F‹Hœw(+)ÜÜâÈzÄäT§FߘãÏ;DmVœ3Àu@mÚüXÝü•3B¨òÌÁÛ<·ÃÜ z,Ì@õÅ·d2]ü8s÷IôÞ¯^Ç9¢u„~ëAŸï4«M? K]­ÅàPl@s_ p:°¬ZR”´›JC[CS.h‹ƒïËœ«Æ]–÷ó‚wR×k7X‰k›‘´ù¦=¡«‰¨¨Â')—71ó’c‡Ðúµ `é.{§p¹ój\Ž{1h{o±Ý=áUÊïGÖŒõ–-BÄm+AZX¶¡ ïHðæ¥JmÙ;…ä¡Ÿˆ¦ ° äšiÉg«$üMk5¤L“’çÊvïâï ,=f“"íἊ5ô¬x6{ɏžID0e¸vçmi'︧ºð9$ò¹÷*£’9ÿ ²TÔ…×>JV¥}Œ}$p[bÔ®*[jzS*8 ”·T›Í–ñUîƒwo$áè=LT™ç—~ô·¤ÈÚ$榍q‰„+´kFm)ž‹©i–ËqÞŠ‰à¶ü( ‚•§ •°ò·‡#5ª•µÊ﯅¡X¨šÁ*F#TXJÊ ušJVÍ&=iÄs1‚3•'fý§5Ñ<=[íÞ­ PÚ;ѱÌ_~Ä££8rÞ ²w;’hDT°>ÈG¬8Á²ÚzŽ®ò®qZcqJêäÞ-ö[ܘbň±çb“Š¶31²n×iƒðÕ;1¶þÉ ªX‰,ßqÏ$>•î íZ¥Z 1{ç൵+ƒÕµ¥°T$§K]á»Ûï*·¤tMI’ÂZbŽÕiÒ˜}bÓ0£ª5›¨ [5Ž^ÝœWøÂÝh° ¢OWun£¤5 a2Z.G2³YL]jåtì”ä ÁÓ‘%"©<ÔúÊ°sº UZvä‡ÄiÆÒM .÷V·™ø#kèýiíÌ–ª)µT[)BˆõÑ xB¾B€ÖT¨.¥~ð@VĶr#¸ü*åZNDŽH;âi ],©£öØpù(šºãö¼T.uCê•4@ÿ GÕÛ)Cx›®0ø#:ÏðFÒbR\(€€Ä®fã4Þ‰Fä¯HXƒÅ,†öEÑÔÜ]Öv²?tLÃvBY£ú6Êu5ÅAQ³1‘’¬x–HŒÐ‡ ^ ¸KwJôÖŽ5×CÚ¨vÜ«/B0$×k°=ðbÇ(Ï)w±A†Á† 11Í=èQšµ626ŒÜ/`G«µ<}—-Ö7KEHÈÉðóȤmݱû±·ø«Snmá=“ä«šmݱŸ¡¶~ó·“äUóJæúòB|E LêŽy´jDÔ$G¢þÐñ7óR8ýÒ…Ç› WVe#·Ÿ p·Fx~•ݤF÷0Èÿ K¯æS<6’¡WШ; ´ÿ ¥Êø\Òuî†åÝ–VNœkÒ7oòX¨Á­Ø÷FÎÑä±g÷ÿ M~Çî=p,X´ ÝÌÚÅ‹’ÃjÖ.ØöÏñ qïQ¤ÓZE†° =6·]܈ s¸>v•Ž^Ý\wq9r‰Î\¸¡kURÒ$­*‹Nq?Þª*!sŠÆ:TU_u±T+øX¡ ®¹¡,ÄâÃBTsÜ$Ø›4m椴zÜK]’’›Pƒ @€#â˜`é¹=I‡fiV•Ôî“nRm+µFPOhÍ0B£ €+¬5c v•:P'ÒyÎ ‰V~‚Ó†ÖuókDoh$å\*ö%Ю=£«…aȼ½÷Û.-½VŒŠ¼'lyî±1¬3ó#ÞE¿ÔS¤gV£m›=§\û"—WU¤ÚǼÿ ÂnÁGŒÃ ‚õN D³õNÚíŒÕ;HôyÄÈ©P¹Ä{:?R‘Ô¨âF÷ø£bÅó® JS|‚R÷ivýáâ€Æé¡è³´IئÑT!§˜•Øª‚¬â@q€wnïCWÄ@JU€ê¯m6]Ï:£âx'+ÒðXvÓ¦Úm=–´7œ $ì“B£~p%ÕŸUþ« N@¼üï~w˜ñø5®—'Ôe»¤5ã//€ž~‰Tþ›Å7•#¤× Íö pÄ$ùeåì*«ÓŠEØWEÈsßg ¦ûvžSsLpºÊW–âµEWöˬH; ™!CYõZ ÃÄf æ#1W. \uWâ\,\Çf j’<qTbên›Î[vxx£ë 'ö¨1›˜ÀM¼Pÿ H)ƒêêŒA7s,|F“ 꺸k³9Ìö*ç®;Ö!Ö$Eiž•¹ÒÚ†ýóéÝû¾ÕS®ó$’NÝäŸz¤5r¦ãÄÃD÷Üø!°ø‡Ô&@m™Ì^Ãä­d q5Lnÿ N;.6½·N|#ä"1Nƒx“ã<3('&ñßt  ~ªu”1Tb㫨9ê–›–bìd$ߣ=#ÕãÒmU¯eí$EFù5ýYô櫨æ왍Ǘ±ssM]·á¿0ÕåJRÓªîiƒ+O58ÖñªŠÒx" \µâá¨i’¤i —Ö ” M+M¤ë9‚‰A¦°Qõ¾ßøK~¼Ã‘g…Ö´~÷Ï[3GUœÒ½#…kàÔ®Ò”‰³·dWV‰IP‰Ú8u¹”E ÖqLj¾êÕCBš{A^Âß;–¨`¯¬ìö ˼ ×tìø.tƐm*n¨y4o&Àx¥n¦×î‡aupáÛj8¿m›è¶ã!o½;ß0y^ý×^EÑ¿ÒjzŒ­)vÚÑnÄL …^ªô× ‡—‚3k Îý­hï]içå–îÏ*÷ñþ»Ô CÒjøjÍznˆ´ ¹#b'Fô‹ ‰v¥'’à'T´ƒHýÍ%M‰ ƒ&ÆÇŒï1 ‘ –Þ ‰i¬s žR-Ÿ kŠ¬á¬7:þ 0ŒÅÒÕ/aÙ¬ÃÝ#Úøœ ©aiVc‰. ¹¦ãµ” ›Yg¦›ÆÎýº°f³7ƒhá·¸­}&D9¡ÂsÉÙÞèŠõØàC™¨ñbFC|´Ü(ŸƒÚÒ-%»'a Ì¿)ËÇn¿úÿ ÞŽX…4ÊÅH^ôΑí@ù¹Eh¶“L8Çjù ¼ÎåVªóR©Ï5uà V4lZß®=€xÖŸ–ÑÈ ÷”¨°¾__yM1tÉ?uÆþIkÄgæ@þ[¢†°XÃJ£j·:nkÅ¢u ‘}âGzö­/IµèŠ¬¼48q¦F°ŽR¼=ûì{´¯RýicS ÕÛ íNtÍÙï£,w4rêì®»~x(©Uñ§#Ñ&œÕ¤>ÎåÍÓ9’Ö{9eV­[Öjâ²ãu]˜å2›qÑšÕJç0€sÄ|Êëè0튔bÁ>“{×_F`Ø©ºê:µä,v¤ðfc1±"«ÔÍän1#=· Âøv~H½ÐßA¾¿Ü€Óš]Õ; I¾÷ç‚Qi†î¹9ywÔKG˜áñ zQY—§ÃÕZ07§X‚ Áh;ÁM)iÌCH-¯T‘ë|A0{Ò½LÚ–TâÖkÜ’dÀ“rmm»”جPF³ÖcbE§T€ÒxKºû’Ó®7±²(\4ŽÃ¸Uu@j™yĵ;³µ!Á¢b.W¤=mõ´êµK k ¸K^ÜÛ#p*Ü14qkZç5ïë †°5Ï%ÍÛ<Õ¤×Ô¥ê†C Õ´¼ú$ƒÖ“”]Ù¬qÞÚ[4©ý!ûÏ—Áb쳐XµA¬â~`›Çr¸8ìùÝ䫦<>ä÷«?xs´ÇÑ /á;¹øüÊÈÙà{"@Žïzâ¬[âß‚ U_<ÇŸ½4èN˜ú61®qŠu ¦þF£»äJ_ˆÙÎ~ ÞAã–Ý„Ï—rŠD;xTž‘ô`É«…suãO`?³à™ô Lý#Íc5öoæØ‚y´´÷«ZR§<&JÇ+éâô´€i!Àˆ0æAoàðLèÖ-2ŸõW.’t^–(KÁmHµV@xÜÇy®Ñø­â^:Ú3w· 7½¹°ñ¸â¹®:',«Mœ—n­Á+Ãbš LÈ‘ÄnRÓÅœ%¦²‰¨ùQ:¤f‚ "PÕtô¸…cæl…&˜Ú˜Ôkv‹ž+vŠ,=¢v­6—Xy*¥t£«<™:“aîϲ=¦6rO]XI¿Œ÷¤zÚ­›¶ 6÷”w\d ü~v®ˆÌk«^m<ÿ ¢‰Õ\)ùºŽ;… lîÙÅEŠ®cѾ@vnMÏ,¼“ñ•ŽBxðÃzãÇç%3ˆ"}Ù•Åî> BÉú;Ò]V+P˜F_´ßé> Øše|ï‡ÄOmFæÇ ãqÞ$/xÐx­z`ï9"œÜij‚!7.\Td…9M‡•iŽ‹¾‘50ÞŽn¥ß4ÉôO ¹*í^QêËÜÇÌ8=Ž§s‰'ÂëÙ«á%Pú[O †ÅP¯VsŽ°.‰,kc¶ ¬A9n˜XÎ-ÞšN["¹QÕ‰ƒMýÁߺXJæÍaLj¾×Ãmã¾ãÚ uñÒþåQô¦¥ /ÄUx:‚ÍÜ’ Đ©ØÝ3V¨‰ÕnÐ6ó*óúK­«…c ¯U òhsý­jóÔj#,ímŒRµ«lbïUTŒÑ8†Ä0œÏr`ð¡¬É Ї ë"À² ™ 6¥ f¶ ¢ÚoܱԷ-<Àî)†a¶ž'Ú»¨TXqØæ¶÷YÄHy˜9ÈIW­YÀuMFë ºÏ’AqÌ4·/Ú †ô'i$øä­=Ä Ý|öK×40è|È6p‘0§)o¥ctî§H+CA-“ xØ|ÐXŠç l8íºð3Ø:³¤¬KX¯UÿÙ _zlib_oc = (bool) ini_get('zlib.output_compression'); $this->_compress_output = ( $this->_zlib_oc === FALSE && config_item('compress_output') === TRUE && extension_loaded('zlib') ); isset(self::$func_overload) OR self::$func_overload = (extension_loaded('mbstring') && ini_get('mbstring.func_overload')); // Get mime types for later $this->mimes =& get_mimes(); log_message('info', 'Output Class Initialized'); } // -------------------------------------------------------------------- /** * Get Output * * Returns the current output string. * * @return string */ public function get_output() { return $this->final_output; } // -------------------------------------------------------------------- /** * Set Output * * Sets the output string. * * @param string $output Output data * @return CI_Output */ public function set_output($output) { $this->final_output = $output; return $this; } // -------------------------------------------------------------------- /** * Append Output * * Appends data onto the output string. * * @param string $output Data to append * @return CI_Output */ public function append_output($output) { $this->final_output .= $output; return $this; } // -------------------------------------------------------------------- /** * Set Header * * Lets you set a server header which will be sent with the final output. * * Note: If a file is cached, headers will not be sent. * @todo We need to figure out how to permit headers to be cached. * * @param string $header Header * @param bool $replace Whether to replace the old header value, if already set * @return CI_Output */ public function set_header($header, $replace = TRUE) { // If zlib.output_compression is enabled it will compress the output, // but it will not modify the content-length header to compensate for // the reduction, causing the browser to hang waiting for more data. // We'll just skip content-length in those cases. if ($this->_zlib_oc && strncasecmp($header, 'content-length', 14) === 0) { return $this; } $this->headers[] = array($header, $replace); return $this; } // -------------------------------------------------------------------- /** * Set Content-Type Header * * @param string $mime_type Extension of the file we're outputting * @param string $charset Character set (default: NULL) * @return CI_Output */ public function set_content_type($mime_type, $charset = NULL) { if (strpos($mime_type, '/') === FALSE) { $extension = ltrim($mime_type, '.'); // Is this extension supported? if (isset($this->mimes[$extension])) { $mime_type =& $this->mimes[$extension]; if (is_array($mime_type)) { $mime_type = current($mime_type); } } } $this->mime_type = $mime_type; if (empty($charset)) { $charset = config_item('charset'); } $header = 'Content-Type: '.$mime_type .(empty($charset) ? '' : '; charset='.$charset); $this->headers[] = array($header, TRUE); return $this; } // -------------------------------------------------------------------- /** * Get Current Content-Type Header * * @return string 'text/html', if not already set */ public function get_content_type() { for ($i = 0, $c = count($this->headers); $i < $c; $i++) { if (sscanf($this->headers[$i][0], 'Content-Type: %[^;]', $content_type) === 1) { return $content_type; } } return 'text/html'; } // -------------------------------------------------------------------- /** * Get Header * * @param string $header * @return string */ public function get_header($header) { // Combine headers already sent with our batched headers $headers = array_merge( // We only need [x][0] from our multi-dimensional array array_map('array_shift', $this->headers), headers_list() ); if (empty($headers) OR empty($header)) { return NULL; } // Count backwards, in order to get the last matching header for ($c = count($headers) - 1; $c > -1; $c--) { if (strncasecmp($header, $headers[$c], $l = self::strlen($header)) === 0) { return trim(self::substr($headers[$c], $l+1)); } } return NULL; } // -------------------------------------------------------------------- /** * Set HTTP Status Header * * As of version 1.7.2, this is an alias for common function * set_status_header(). * * @param int $code Status code (default: 200) * @param string $text Optional message * @return CI_Output */ public function set_status_header($code = 200, $text = '') { set_status_header($code, $text); return $this; } // -------------------------------------------------------------------- /** * Enable/disable Profiler * * @param bool $val TRUE to enable or FALSE to disable * @return CI_Output */ public function enable_profiler($val = TRUE) { $this->enable_profiler = is_bool($val) ? $val : TRUE; return $this; } // -------------------------------------------------------------------- /** * Set Profiler Sections * * Allows override of default/config settings for * Profiler section display. * * @param array $sections Profiler sections * @return CI_Output */ public function set_profiler_sections($sections) { if (isset($sections['query_toggle_count'])) { $this->_profiler_sections['query_toggle_count'] = (int) $sections['query_toggle_count']; unset($sections['query_toggle_count']); } foreach ($sections as $section => $enable) { $this->_profiler_sections[$section] = ($enable !== FALSE); } return $this; } // -------------------------------------------------------------------- /** * Set Cache * * @param int $time Cache expiration time in minutes * @return CI_Output */ public function cache($time) { $this->cache_expiration = is_numeric($time) ? $time : 0; return $this; } // -------------------------------------------------------------------- /** * Display Output * * Processes and sends finalized output data to the browser along * with any server headers and profile data. It also stops benchmark * timers so the page rendering speed and memory usage can be shown. * * Note: All "view" data is automatically put into $this->final_output * by controller class. * * @uses CI_Output::$final_output * @param string $output Output data override * @return void */ public function _display($output = '') { // Note: We use load_class() because we can't use $CI =& get_instance() // since this function is sometimes called by the caching mechanism, // which happens before the CI super object is available. $BM =& load_class('Benchmark', 'core'); $CFG =& load_class('Config', 'core'); // Grab the super object if we can. if (class_exists('CI_Controller', FALSE)) { $CI =& get_instance(); } // -------------------------------------------------------------------- // Set the output data if ($output === '') { $output =& $this->final_output; } // -------------------------------------------------------------------- // Do we need to write a cache file? Only if the controller does not have its // own _output() method and we are not dealing with a cache file, which we // can determine by the existence of the $CI object above if ($this->cache_expiration > 0 && isset($CI) && ! method_exists($CI, '_output')) { $this->_write_cache($output); } // -------------------------------------------------------------------- // Parse out the elapsed time and memory usage, // then swap the pseudo-variables with the data $elapsed = $BM->elapsed_time('total_execution_time_start', 'total_execution_time_end'); if ($this->parse_exec_vars === TRUE) { $memory = round(memory_get_usage() / 1024 / 1024, 2).'MB'; $output = str_replace(array('{elapsed_time}', '{memory_usage}'), array($elapsed, $memory), $output); } // -------------------------------------------------------------------- // Is compression requested? if (isset($CI) // This means that we're not serving a cache file, if we were, it would already be compressed && $this->_compress_output === TRUE && isset($_SERVER['HTTP_ACCEPT_ENCODING']) && strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== FALSE) { ob_start('ob_gzhandler'); } // -------------------------------------------------------------------- // Are there any server headers to send? if (count($this->headers) > 0) { foreach ($this->headers as $header) { @header($header[0], $header[1]); } } // -------------------------------------------------------------------- // Does the $CI object exist? // If not we know we are dealing with a cache file so we'll // simply echo out the data and exit. if ( ! isset($CI)) { if ($this->_compress_output === TRUE) { if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) && strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== FALSE) { header('Content-Encoding: gzip'); header('Content-Length: '.self::strlen($output)); } else { // User agent doesn't support gzip compression, // so we'll have to decompress our cache $output = gzinflate(self::substr($output, 10, -8)); } } echo $output; log_message('info', 'Final output sent to browser'); log_message('debug', 'Total execution time: '.$elapsed); return; } // -------------------------------------------------------------------- // Do we need to generate profile data? // If so, load the Profile class and run it. if ($this->enable_profiler === TRUE) { $CI->load->library('profiler'); if ( ! empty($this->_profiler_sections)) { $CI->profiler->set_sections($this->_profiler_sections); } // If the output data contains closing and tags // we will remove them and add them back after we insert the profile data $output = preg_replace('|.*?|is', '', $output, -1, $count).$CI->profiler->run(); if ($count > 0) { $output .= ''; } } // Does the controller contain a function named _output()? // If so send the output there. Otherwise, echo it. if (method_exists($CI, '_output')) { $CI->_output($output); } else { echo $output; // Send it to the browser! } log_message('info', 'Final output sent to browser'); log_message('debug', 'Total execution time: '.$elapsed); } // -------------------------------------------------------------------- /** * Write Cache * * @param string $output Output data to cache * @return void */ public function _write_cache($output) { $CI =& get_instance(); $path = $CI->config->item('cache_path'); $cache_path = ($path === '') ? APPPATH.'cache/' : $path; if ( ! is_dir($cache_path) OR ! is_really_writable($cache_path)) { log_message('error', 'Unable to write cache file: '.$cache_path); return; } $uri = $CI->config->item('base_url') .$CI->config->item('index_page') .$CI->uri->uri_string(); if (($cache_query_string = $CI->config->item('cache_query_string')) && ! empty($_SERVER['QUERY_STRING'])) { if (is_array($cache_query_string)) { $uri .= '?'.http_build_query(array_intersect_key($_GET, array_flip($cache_query_string))); } else { $uri .= '?'.$_SERVER['QUERY_STRING']; } } $cache_path .= md5($uri); if ( ! $fp = @fopen($cache_path, 'w+b')) { log_message('error', 'Unable to write cache file: '.$cache_path); return; } if ( ! flock($fp, LOCK_EX)) { log_message('error', 'Unable to secure a file lock for file at: '.$cache_path); fclose($fp); return; } // If output compression is enabled, compress the cache // itself, so that we don't have to do that each time // we're serving it if ($this->_compress_output === TRUE) { $output = gzencode($output); if ($this->get_header('content-type') === NULL) { $this->set_content_type($this->mime_type); } } $expire = time() + ($this->cache_expiration * 60); // Put together our serialized info. $cache_info = serialize(array( 'expire' => $expire, 'headers' => $this->headers )); $output = $cache_info.'ENDCI--->'.$output; for ($written = 0, $length = self::strlen($output); $written < $length; $written += $result) { if (($result = fwrite($fp, self::substr($output, $written))) === FALSE) { break; } } flock($fp, LOCK_UN); fclose($fp); if ( ! is_int($result)) { @unlink($cache_path); log_message('error', 'Unable to write the complete cache content at: '.$cache_path); return; } chmod($cache_path, 0640); log_message('debug', 'Cache file written: '.$cache_path); // Send HTTP cache-control headers to browser to match file cache settings. $this->set_cache_header($_SERVER['REQUEST_TIME'], $expire); } // -------------------------------------------------------------------- /** * Update/serve cached output * * @uses CI_Config * @uses CI_URI * * @param object &$CFG CI_Config class instance * @param object &$URI CI_URI class instance * @return bool TRUE on success or FALSE on failure */ public function _display_cache(&$CFG, &$URI) { $cache_path = ($CFG->item('cache_path') === '') ? APPPATH.'cache/' : $CFG->item('cache_path'); // Build the file path. The file name is an MD5 hash of the full URI $uri = $CFG->item('base_url').$CFG->item('index_page').$URI->uri_string; if (($cache_query_string = $CFG->item('cache_query_string')) && ! empty($_SERVER['QUERY_STRING'])) { if (is_array($cache_query_string)) { $uri .= '?'.http_build_query(array_intersect_key($_GET, array_flip($cache_query_string))); } else { $uri .= '?'.$_SERVER['QUERY_STRING']; } } $filepath = $cache_path.md5($uri); if ( ! file_exists($filepath) OR ! $fp = @fopen($filepath, 'rb')) { return FALSE; } flock($fp, LOCK_SH); $cache = (filesize($filepath) > 0) ? fread($fp, filesize($filepath)) : ''; flock($fp, LOCK_UN); fclose($fp); // Look for embedded serialized file info. if ( ! preg_match('/^(.*)ENDCI--->/', $cache, $match)) { return FALSE; } $cache_info = unserialize($match[1]); $expire = $cache_info['expire']; $last_modified = filemtime($filepath); // Has the file expired? if ($_SERVER['REQUEST_TIME'] >= $expire && is_really_writable($cache_path)) { // If so we'll delete it. @unlink($filepath); log_message('debug', 'Cache file has expired. File deleted.'); return FALSE; } // Send the HTTP cache control headers $this->set_cache_header($last_modified, $expire); // Add headers from cache file. foreach ($cache_info['headers'] as $header) { $this->set_header($header[0], $header[1]); } // Display the cache $this->_display(self::substr($cache, self::strlen($match[0]))); log_message('debug', 'Cache file is current. Sending it to browser.'); return TRUE; } // -------------------------------------------------------------------- /** * Delete cache * * @param string $uri URI string * @return bool */ public function delete_cache($uri = '') { $CI =& get_instance(); $cache_path = $CI->config->item('cache_path'); if ($cache_path === '') { $cache_path = APPPATH.'cache/'; } if ( ! is_dir($cache_path)) { log_message('error', 'Unable to find cache path: '.$cache_path); return FALSE; } if (empty($uri)) { $uri = $CI->uri->uri_string(); if (($cache_query_string = $CI->config->item('cache_query_string')) && ! empty($_SERVER['QUERY_STRING'])) { if (is_array($cache_query_string)) { $uri .= '?'.http_build_query(array_intersect_key($_GET, array_flip($cache_query_string))); } else { $uri .= '?'.$_SERVER['QUERY_STRING']; } } } $cache_path .= md5($CI->config->item('base_url').$CI->config->item('index_page').ltrim($uri, '/')); if ( ! @unlink($cache_path)) { log_message('error', 'Unable to delete cache file for '.$uri); return FALSE; } return TRUE; } // -------------------------------------------------------------------- /** * Set Cache Header * * Set the HTTP headers to match the server-side file cache settings * in order to reduce bandwidth. * * @param int $last_modified Timestamp of when the page was last modified * @param int $expiration Timestamp of when should the requested page expire from cache * @return void */ public function set_cache_header($last_modified, $expiration) { $max_age = $expiration - $_SERVER['REQUEST_TIME']; if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $last_modified <= strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE'])) { $this->set_status_header(304); exit; } header('Pragma: public'); header('Cache-Control: max-age='.$max_age.', public'); header('Expires: '.gmdate('D, d M Y H:i:s', $expiration).' GMT'); header('Last-modified: '.gmdate('D, d M Y H:i:s', $last_modified).' GMT'); } // -------------------------------------------------------------------- /** * Byte-safe strlen() * * @param string $str * @return int */ protected static function strlen($str) { return (self::$func_overload) ? mb_strlen($str, '8bit') : strlen($str); } // -------------------------------------------------------------------- /** * Byte-safe substr() * * @param string $str * @param int $start * @param int $length * @return string */ protected static function substr($str, $start, $length = NULL) { if (self::$func_overload) { // mb_substr($str, $start, null, '8bit') returns an empty // string on PHP 5.3 isset($length) OR $length = ($start >= 0 ? self::strlen($str) - $start : -$start); return mb_substr($str, $start, $length, '8bit'); } return isset($length) ? substr($str, $start, $length) : substr($str, $start); } }