{"id":1490,"date":"2026-05-22T10:12:47","date_gmt":"2026-05-22T07:12:47","guid":{"rendered":"https:\/\/kolan.net.tr\/blog\/?p=1490"},"modified":"2026-05-22T13:27:08","modified_gmt":"2026-05-22T10:27:08","slug":"http-error-kodlari","status":"publish","type":"post","link":"https:\/\/kolan.net.tr\/blog\/http-error-kodlari\/","title":{"rendered":"HTTP Error Kodlar\u0131 ve \u00c7\u00f6z\u00fcmleri: 400, 500 ve Di\u011fer Yayg\u0131n Hatalar Rehberi"},"content":{"rendered":"<p>Bir web sitesini ziyaret ederken kar\u015f\u0131n\u0131za &#8220;404 Not Found&#8221;, &#8220;500 Internal Server Error&#8221; ya da &#8220;502 Bad Gateway&#8221; gibi bir mesaj \u00e7\u0131kt\u0131\u011f\u0131nda \u00e7o\u011funlukla ne yapaca\u011f\u0131n\u0131z\u0131 bilmezsiniz. Oysa bu say\u0131lar rastgele se\u00e7ilmi\u015f de\u011fildir; her biri taray\u0131c\u0131 ile sunucu aras\u0131nda ge\u00e7en ileti\u015fimin sonucunu \u00f6zetleyen <strong>HTTP durum kodlar\u0131d\u0131r<\/strong>. Hatan\u0131n <em>nerede<\/em> olu\u015ftu\u011funu (taray\u0131c\u0131da, a\u011fda, sunucuda ya da uygulamada) ve <em>nas\u0131l<\/em> \u00e7\u00f6z\u00fclece\u011fini anlaman\u0131n en h\u0131zl\u0131 yolu bu kodlar\u0131 okuyabilmektir. Bu yaz\u0131da <strong>en yayg\u0131n HTTP error kodlar\u0131n\u0131<\/strong>, sebeplerini ve hem ziyaret\u00e7i hem site sahibi taraf\u0131nda izlenebilecek somut \u00e7\u00f6z\u00fcm yollar\u0131n\u0131 tek tek inceleyece\u011fiz.<\/p>\n<h2>HTTP Durum Kodu Nedir?<\/h2>\n<p>HTTP durum kodu, bir istemcinin (taray\u0131c\u0131, mobil uygulama, API istemcisi) sunucuya g\u00f6nderdi\u011fi iste\u011fe kar\u015f\u0131l\u0131k sunucunun d\u00f6nd\u00fcrd\u00fc\u011f\u00fc <strong>\u00fc\u00e7 haneli say\u0131sal yan\u0131tt\u0131r<\/strong>. Bu kod, iste\u011fin ba\u015far\u0131l\u0131 olup olmad\u0131\u011f\u0131n\u0131, ba\u015far\u0131s\u0131zsa nerede ve neden hata ya\u015fand\u0131\u011f\u0131n\u0131 standart bir dille bildirir.<\/p>\n<p>Kodlar ilk hanelerine g\u00f6re be\u015f s\u0131n\u0131fa ayr\u0131l\u0131r:<\/p>\n<ul>\n<li><strong>1xx \u2014 Bilgilendirme:<\/strong> \u0130stek al\u0131nd\u0131, i\u015fleniyor.<\/li>\n<li><strong>2xx \u2014 Ba\u015far\u0131l\u0131:<\/strong> \u0130stek ba\u015far\u0131yla kar\u015f\u0131land\u0131 (\u00f6rn. 200 OK).<\/li>\n<li><strong>3xx \u2014 Y\u00f6nlendirme:<\/strong> Kaynak ba\u015fka bir adrese ta\u015f\u0131nm\u0131\u015f.<\/li>\n<li><strong>4xx \u2014 \u0130stemci hatas\u0131:<\/strong> Sorun iste\u011fi g\u00f6nderen taraftad\u0131r.<\/li>\n<li><strong>5xx \u2014 Sunucu hatas\u0131:<\/strong> Sorun yan\u0131t veren sunucu taraf\u0131ndad\u0131r.<\/li>\n<\/ul>\n<p>Hata te\u015fhisinin temeli buradad\u0131r: <strong>4xx<\/strong> g\u00f6rd\u00fc\u011f\u00fcn\u00fczde \u00f6nce iste\u011fi, <strong>5xx<\/strong> g\u00f6rd\u00fc\u011f\u00fcn\u00fczde \u00f6nce sunucuyu sorgulars\u0131n\u0131z.<\/p>\n<h2>4xx \u2014 \u0130stemci Kaynakl\u0131 Hatalar<\/h2>\n<p>4xx s\u0131n\u0131f\u0131ndaki kodlar, sunucunun iste\u011fi ald\u0131\u011f\u0131n\u0131 ama iste\u011fin kendisinde bir sorun oldu\u011funu s\u00f6yler. \u00c7o\u011fu zaman \u00e7\u00f6z\u00fcm taray\u0131c\u0131, URL, kimlik do\u011frulama ya da yetki d\u00fczeyinde aran\u0131r.<\/p>\n<h3>400 Bad Request<\/h3>\n<p><strong>Anlam\u0131:<\/strong> Sunucu iste\u011fi anlayamad\u0131. \u0130stek s\u00f6zdizimi bozuk, ba\u015fl\u0131klar\u0131 ge\u00e7ersiz ya da g\u00f6nderilen veri beklenen bi\u00e7imde de\u011fildir.<\/p>\n<p><strong>S\u0131k g\u00f6r\u00fclen sebepler:<\/strong><\/p>\n<ul>\n<li>Hatal\u0131 yaz\u0131lm\u0131\u015f URL veya bozuk sorgu parametreleri<\/li>\n<li>Bozulmu\u015f \u00e7erezler (\u00f6zellikle \u00e7ok b\u00fcy\u00fck cookie boyutu)<\/li>\n<li>API iste\u011finde ge\u00e7ersiz JSON \/ form verisi<\/li>\n<li>Yanl\u0131\u015f Content-Type ba\u015fl\u0131\u011f\u0131<\/li>\n<\/ul>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>URL&#8217;yi yeniden yaz\u0131p deneyin; \u00f6zel karakter ya da bo\u015fluk olup olmad\u0131\u011f\u0131n\u0131 kontrol edin.<\/li>\n<li>Taray\u0131c\u0131 \u00e7erezlerini ve \u00f6nbelle\u011fini temizleyin.<\/li>\n<li>API \u00e7a\u011fr\u0131lar\u0131nda istek g\u00f6vdesinin ge\u00e7erli JSON oldu\u011funu, Content-Type ba\u015fl\u0131\u011f\u0131n\u0131n do\u011fru ayarland\u0131\u011f\u0131n\u0131 do\u011frulay\u0131n.<\/li>\n<li>Sunucu taraf\u0131nda istek boyutu (max body size) limitini kontrol edin.<\/li>\n<\/ul>\n<h3>401 Unauthorized<\/h3>\n<p><strong>Anlam\u0131:<\/strong> Kayna\u011fa eri\u015fmek i\u00e7in kimlik do\u011frulama gerekiyor; istek do\u011frulanmam\u0131\u015f ya da kimlik bilgileri ge\u00e7ersiz.<\/p>\n<p><strong>S\u0131k g\u00f6r\u00fclen sebepler:<\/strong><\/p>\n<ul>\n<li>Eksik veya yanl\u0131\u015f kullan\u0131c\u0131 ad\u0131\/parola<\/li>\n<li>S\u00fcresi dolmu\u015f ya da ge\u00e7ersiz API token \/ JWT<\/li>\n<li>Yanl\u0131\u015f kimlik do\u011frulama y\u00f6ntemi (Basic, Bearer kar\u0131\u015f\u0131kl\u0131\u011f\u0131)<\/li>\n<\/ul>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>Kimlik bilgilerinizi yeniden girin, parola y\u00f6neticisinden kopyalanan de\u011ferin ba\u015f\u0131nda\/sonunda bo\u015fluk olmad\u0131\u011f\u0131ndan emin olun.<\/li>\n<li>API kullan\u0131yorsan\u0131z token&#8217;\u0131 yenileyin ya da yeni bir token \u00fcretin.<\/li>\n<li>Authorization ba\u015fl\u0131\u011f\u0131n\u0131n do\u011fru formatta g\u00f6nderildi\u011fini kontrol edin.<\/li>\n<\/ul>\n<h3>403 Forbidden<\/h3>\n<p><strong>Anlam\u0131:<\/strong> Sunucu iste\u011fi anlad\u0131 ama eri\u015fime izin vermiyor. Burada sorun &#8220;kim oldu\u011fun&#8221; de\u011fil, &#8220;yetkin&#8221; sorusudur.<\/p>\n<p><strong>S\u0131k g\u00f6r\u00fclen sebepler:<\/strong><\/p>\n<ul>\n<li>Dosya\/dizin izinlerinin hatal\u0131 ayarlanmas\u0131 (\u00f6rn. 600 yerine 644 olmal\u0131)<\/li>\n<li>.htaccess ya da Nginx kural\u0131 taraf\u0131ndan bloklanm\u0131\u015f IP \/ yol<\/li>\n<li>Dizin listelemenin (directory listing) kapal\u0131 olmas\u0131 ve index dosyas\u0131n\u0131n bulunamamas\u0131<\/li>\n<li>WAF \/ g\u00fcvenlik eklentilerinin iste\u011fi engellemesi<\/li>\n<li>Hotlink korumas\u0131 nedeniyle d\u0131\u015f kaynakl\u0131 iste\u011fin reddedilmesi<\/li>\n<\/ul>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>Sunucuda dosya izinlerini kontrol edin: dosyalar genelde 644, dizinler 755 olmal\u0131d\u0131r.<\/li>\n<li>.htaccess veya Nginx konfig\u00fcrasyonunda &#8220;Deny&#8221;, &#8220;Require&#8221; veya &#8220;return 403&#8221; direktiflerini g\u00f6zden ge\u00e7irin.<\/li>\n<li>Dizinde ge\u00e7erli bir index dosyas\u0131 (index.html, index.php) bulundu\u011fundan emin olun.<\/li>\n<li>G\u00fcvenlik eklentilerinin \/ WAF kurallar\u0131n\u0131n false positive \u00fcretip \u00fcretmedi\u011fini log \u00fczerinden inceleyin.<\/li>\n<\/ul>\n<h3>404 Not Found<\/h3>\n<p><strong>Anlam\u0131:<\/strong> \u0130stenen kaynak sunucuda mevcut de\u011fil. Web&#8217;in en s\u0131k g\u00f6r\u00fclen hatas\u0131d\u0131r.<\/p>\n<p><strong>S\u0131k g\u00f6r\u00fclen sebepler:<\/strong><\/p>\n<ul>\n<li>Sayfa silinmi\u015f ya da yeniden adland\u0131r\u0131lm\u0131\u015f<\/li>\n<li>URL&#8217;de yaz\u0131m hatas\u0131<\/li>\n<li>Eski ba\u011flant\u0131lar\u0131n y\u00f6nlendirme yap\u0131lmadan k\u0131r\u0131lmas\u0131<\/li>\n<li>WordPress \/ framework&#8217;lerde permalink yap\u0131s\u0131n\u0131n bozulmas\u0131<\/li>\n<\/ul>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>Site sahibiyseniz silinen URL&#8217;ler i\u00e7in 301 y\u00f6nlendirme tan\u0131mlay\u0131n.<\/li>\n<li>WordPress&#8217;te <em>Ayarlar &gt; Kal\u0131c\u0131 Ba\u011flant\u0131lar<\/em> sayfas\u0131n\u0131 yeniden kaydederek permalink yap\u0131s\u0131n\u0131 yenileyin.<\/li>\n<li>Sunucu loglar\u0131ndan (access log) en \u00e7ok 404 alan URL&#8217;leri listeleyip toplu y\u00f6nlendirme plan\u0131 yap\u0131n.<\/li>\n<li>Ziyaret\u00e7iye kullan\u0131\u015fl\u0131, navigasyon i\u00e7eren bir 404 sayfas\u0131 tasarlay\u0131n.<\/li>\n<\/ul>\n<h3>405 Method Not Allowed<\/h3>\n<p><strong>Anlam\u0131:<\/strong> URL ge\u00e7erli ama kullan\u0131lan HTTP metodu (GET, POST, PUT, DELETE vb.) bu kaynak i\u00e7in desteklenmiyor.<\/p>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>API dok\u00fcmantasyonundan ilgili endpoint&#8217;in hangi metodu kabul etti\u011fini do\u011frulay\u0131n.<\/li>\n<li>Form g\u00f6nderimlerinde method=&#8221;post&#8221; tan\u0131m\u0131n\u0131n do\u011fru oldu\u011fundan emin olun.<\/li>\n<li>Sunucu taraf\u0131nda o metodun a\u00e7\u0131k\u00e7a reddedilip reddedilmedi\u011fini kontrol edin.<\/li>\n<\/ul>\n<h3>408 Request Timeout<\/h3>\n<p><strong>Anlam\u0131:<\/strong> Sunucu iste\u011fin tamamlanmas\u0131n\u0131 beklerken zaman a\u015f\u0131m\u0131na u\u011frad\u0131.<\/p>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>\u0130nternet ba\u011flant\u0131n\u0131z\u0131 kontrol edin; mobil\/Wi-Fi ge\u00e7i\u015flerinde s\u0131k g\u00f6r\u00fcl\u00fcr.<\/li>\n<li>B\u00fcy\u00fck dosya y\u00fcklemelerinde sunucu taraf\u0131nda <code>client_body_timeout<\/code> \/ <code>max_execution_time<\/code> de\u011ferlerini art\u0131r\u0131n.<\/li>\n<\/ul>\n<h3>413 Payload Too Large<\/h3>\n<p><strong>Anlam\u0131:<\/strong> G\u00f6nderilen istek g\u00f6vdesi sunucunun izin verdi\u011fi \u00fcst s\u0131n\u0131r\u0131 a\u015f\u0131yor.<\/p>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>Nginx&#8217;te <code>client_max_body_size<\/code>, Apache&#8217;de <code>LimitRequestBody<\/code> de\u011ferini art\u0131r\u0131n.<\/li>\n<li>PHP i\u00e7in <code>upload_max_filesize<\/code> ve <code>post_max_size<\/code> de\u011ferlerini b\u00fcy\u00fct\u00fcn.<\/li>\n<li>M\u00fcmk\u00fcnse b\u00fcy\u00fck dosyalar\u0131 par\u00e7al\u0131 (chunked) y\u00fckleyin.<\/li>\n<\/ul>\n<h3>429 Too Many Requests<\/h3>\n<p><strong>Anlam\u0131:<\/strong> Belirli bir s\u00fcre i\u00e7inde \u00e7ok fazla istek g\u00f6nderildi; rate limit&#8217;e tak\u0131ld\u0131n\u0131z.<\/p>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>Yan\u0131ttaki <code>Retry-After<\/code> ba\u015fl\u0131\u011f\u0131na g\u00f6re bekleyip yeniden deneyin.<\/li>\n<li>\u0130stemci taraf\u0131nda istekleri kuyru\u011fa al\u0131p exponential backoff uygulay\u0131n.<\/li>\n<li>Sunucu sahibiyseniz limit de\u011ferlerini ger\u00e7ek trafik desenine g\u00f6re yeniden ayarlay\u0131n; me\u015fru kullan\u0131c\u0131y\u0131 bot ile ayn\u0131 kefeye koymad\u0131\u011f\u0131n\u0131zdan emin olun.<\/li>\n<\/ul>\n<h2>5xx \u2014 Sunucu Kaynakl\u0131 Hatalar<\/h2>\n<p>5xx s\u0131n\u0131f\u0131, sunucunun iste\u011fi almas\u0131na ra\u011fmen yan\u0131t\u0131 \u00fcretemedi\u011fini s\u00f6yler. \u00c7\u00f6z\u00fcm \u00e7o\u011funlukla sunucu ya da uygulama taraf\u0131nda aran\u0131r; ziyaret\u00e7i olarak yapabilecekleriniz s\u0131n\u0131rl\u0131d\u0131r.<\/p>\n<h3>500 Internal Server Error<\/h3>\n<p><strong>Anlam\u0131:<\/strong> Sunucuda beklenmeyen bir hata olu\u015ftu, ancak sunucu sorunu daha spesifik bir kodla ifade edemiyor. En genel ve en s\u0131k g\u00f6r\u00fclen sunucu hatas\u0131d\u0131r.<\/p>\n<p><strong>S\u0131k g\u00f6r\u00fclen sebepler:<\/strong><\/p>\n<ul>\n<li>Uygulamada yakalanmayan istisna (PHP fatal error, Python traceback, Node.js unhandled exception)<\/li>\n<li>Hatal\u0131 .htaccess kural\u0131<\/li>\n<li>Yetersiz bellek (PHP <code>memory_limit<\/code> a\u015f\u0131m\u0131)<\/li>\n<li>Veritaban\u0131 ba\u011flant\u0131s\u0131n\u0131n kopmas\u0131<\/li>\n<li>Hatal\u0131 dosya izinleri (CGI scriptleri i\u00e7in)<\/li>\n<\/ul>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>Sunucu hata loglar\u0131n\u0131 (Apache <code>error_log<\/code>, Nginx <code>error.log<\/code>, uygulama logu) inceleyin \u2014 ger\u00e7ek hata mesaj\u0131 buradad\u0131r.<\/li>\n<li>Son de\u011fi\u015ftirilen dosyay\u0131 \/ eklentiyi geri alarak hatan\u0131n kayna\u011f\u0131n\u0131 izole edin.<\/li>\n<li>WordPress&#8217;te t\u00fcm eklentileri devre d\u0131\u015f\u0131 b\u0131rak\u0131p tek tek aktive ederek sorunlu eklentiyi bulun.<\/li>\n<li><code>memory_limit<\/code>, <code>max_execution_time<\/code> gibi PHP de\u011ferlerini art\u0131r\u0131n.<\/li>\n<li>.htaccess dosyas\u0131n\u0131 ge\u00e7ici olarak yeniden adland\u0131r\u0131p testi tekrarlay\u0131n.<\/li>\n<\/ul>\n<h3>501 Not Implemented<\/h3>\n<p><strong>Anlam\u0131:<\/strong> Sunucu, iste\u011fi yerine getirmek i\u00e7in gereken i\u015flevi desteklemiyor (\u00f6rne\u011fin PUT veya DELETE metodu tan\u0131ml\u0131 de\u011fil).<\/p>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>Sunucu yaz\u0131l\u0131m\u0131n\u0131n ve mod\u00fcllerinin g\u00fcncel oldu\u011fundan emin olun.<\/li>\n<li>Reverse proxy arkas\u0131nda \u00e7al\u0131\u015f\u0131yorsan\u0131z izin verilen metod listesini kontrol edin.<\/li>\n<\/ul>\n<h3>502 Bad Gateway<\/h3>\n<p><strong>Anlam\u0131:<\/strong> Bir ara sunucu (genelde Nginx, Cloudflare, y\u00fck dengeleyici) arka u\u00e7tan ge\u00e7ersiz bir yan\u0131t ald\u0131 ya da hi\u00e7 yan\u0131t alamad\u0131.<\/p>\n<p><strong>S\u0131k g\u00f6r\u00fclen sebepler:<\/strong><\/p>\n<ul>\n<li>PHP-FPM \/ Node.js \/ uWSGI servisinin \u00e7\u00f6km\u00fc\u015f olmas\u0131<\/li>\n<li>Upstream uygulaman\u0131n zaman a\u015f\u0131m\u0131na u\u011framas\u0131<\/li>\n<li>DNS hatalar\u0131<\/li>\n<li>CDN (Cloudflare) ile origin sunucu aras\u0131nda ba\u011flant\u0131 sorunu<\/li>\n<\/ul>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>Arka u\u00e7 servisinin \u00e7al\u0131\u015f\u0131p \u00e7al\u0131\u015fmad\u0131\u011f\u0131n\u0131 kontrol edin: <code>systemctl status php-fpm<\/code>, <code>systemctl status nginx<\/code> gibi komutlarla servis durumunu g\u00f6r\u00fcn.<\/li>\n<li>Nginx error log&#8217;unda &#8220;upstream&#8221; sat\u0131rlar\u0131na bak\u0131n; hangi servisin yan\u0131t vermedi\u011fi yazar.<\/li>\n<li>Upstream zaman a\u015f\u0131m\u0131 de\u011ferlerini (<code>proxy_read_timeout<\/code>, <code>fastcgi_read_timeout<\/code>) art\u0131r\u0131n.<\/li>\n<li>Cloudflare kullan\u0131yorsan\u0131z origin IP&#8217;nin eri\u015filebilir ve g\u00fcvenlik duvar\u0131nda izinli oldu\u011fundan emin olun.<\/li>\n<\/ul>\n<h3>503 Service Unavailable<\/h3>\n<p><strong>Anlam\u0131:<\/strong> Sunucu ge\u00e7ici olarak iste\u011fe yan\u0131t veremiyor \u2014 genellikle a\u015f\u0131r\u0131 y\u00fck, bak\u0131m modu ya da kaynak yetersizli\u011fi nedeniyle.<\/p>\n<p><strong>S\u0131k g\u00f6r\u00fclen sebepler:<\/strong><\/p>\n<ul>\n<li>CPU veya bellek doygunlu\u011fu<\/li>\n<li>Yap\u0131lan planl\u0131 bak\u0131m<\/li>\n<li>Maksimum e\u015fzamanl\u0131 ba\u011flant\u0131 say\u0131s\u0131n\u0131n a\u015f\u0131lmas\u0131<\/li>\n<li>DDoS ya da ani trafik art\u0131\u015f\u0131<\/li>\n<\/ul>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>Sunucu kaynak kullan\u0131m\u0131n\u0131 izleyin (<code>top<\/code>, <code>htop<\/code>, <code>vmstat<\/code>); darbo\u011faz CPU mu, RAM m\u0131, disk I\/O mu bulun.<\/li>\n<li>Web sunucusunun worker\/process limitlerini art\u0131r\u0131n (Apache <code>MaxRequestWorkers<\/code>, PHP-FPM <code>pm.max_children<\/code>).<\/li>\n<li>Trafik anormalse log analiz edip k\u00f6t\u00fc niyetli istekleri filtreleyin.<\/li>\n<li>Planl\u0131 bak\u0131m s\u0131ras\u0131nda <code>Retry-After<\/code> ba\u015fl\u0131\u011f\u0131n\u0131 mutlaka ekleyin; arama motorlar\u0131 i\u00e7in kritik.<\/li>\n<li>Kal\u0131c\u0131 \u00e7\u00f6z\u00fcm gerekiyorsa daha g\u00fc\u00e7l\u00fc bir <a href=\"https:\/\/kolan.net.tr\/sunucu\">VDS \/ sunucu paketine<\/a> ge\u00e7meyi de\u011ferlendirin.<\/li>\n<\/ul>\n<h3>504 Gateway Timeout<\/h3>\n<p><strong>Anlam\u0131:<\/strong> Ara sunucu, arka u\u00e7 sunucudan zaman\u0131nda yan\u0131t alamad\u0131. 502&#8217;ye benzer ama burada sorun &#8220;yan\u0131t yok&#8221; de\u011fil, &#8220;yan\u0131t \u00e7ok ge\u00e7&#8221; olmas\u0131d\u0131r.<\/p>\n<p><strong>S\u0131k g\u00f6r\u00fclen sebepler:<\/strong><\/p>\n<ul>\n<li>Yava\u015f \u00e7al\u0131\u015fan SQL sorgular\u0131<\/li>\n<li>Uzun s\u00fcren arka plan i\u015flemlerinin HTTP iste\u011fi i\u00e7inde \u00e7al\u0131\u015ft\u0131r\u0131lmas\u0131<\/li>\n<li>D\u0131\u015f API \u00e7a\u011fr\u0131lar\u0131n\u0131n (\u00f6deme, harita, e-posta servisi) tak\u0131l\u0131 kalmas\u0131<\/li>\n<li>Yetersiz upstream timeout ayarlar\u0131<\/li>\n<\/ul>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>Yava\u015f sorgu loglar\u0131n\u0131 (slow query log) a\u00e7\u0131p veritaban\u0131n\u0131 optimize edin; eksik index&#8217;leri ekleyin.<\/li>\n<li>Uzun s\u00fcren i\u015fleri kuyruk sistemine (Redis Queue, RabbitMQ, Laravel Queue) ta\u015f\u0131y\u0131n; HTTP iste\u011finde bekletmeyin.<\/li>\n<li>D\u0131\u015f API \u00e7a\u011fr\u0131lar\u0131na makul timeout koyun ve hata durumunda kullan\u0131c\u0131ya h\u0131zl\u0131 geri d\u00f6n\u00fc\u015f sa\u011flay\u0131n.<\/li>\n<li>Ara katman zaman a\u015f\u0131mlar\u0131n\u0131 ger\u00e7ek\u00e7i seviyeye \u00e7\u0131kar\u0131n (\u00f6rne\u011fin <code>proxy_read_timeout 60s<\/code>).<\/li>\n<\/ul>\n<h3>507 Insufficient Storage<\/h3>\n<p><strong>Anlam\u0131:<\/strong> Sunucuda iste\u011fi tamamlamak i\u00e7in yeterli disk alan\u0131 yok.<\/p>\n<p><strong>\u00c7\u00f6z\u00fcm yolu:<\/strong><\/p>\n<ul>\n<li>Disk kullan\u0131m\u0131n\u0131 <code>df -h<\/code> ile kontrol edin.<\/li>\n<li>Log, \u00f6nbellek, eski yedek dosyalar\u0131n\u0131 temizleyin.<\/li>\n<li>Kal\u0131c\u0131 olarak disk kapasitenizi art\u0131r\u0131n.<\/li>\n<\/ul>\n<h2>3xx \u2014 Y\u00f6nlendirme Kodlar\u0131 (K\u0131sa Bir Bak\u0131\u015f)<\/h2>\n<p>3xx kodlar\u0131 teknik olarak hata de\u011fildir; ancak yanl\u0131\u015f kullan\u0131ld\u0131\u011f\u0131nda SEO ve kullan\u0131c\u0131 deneyimini bozar.<\/p>\n<ul>\n<li><strong>301 Moved Permanently:<\/strong> Kal\u0131c\u0131 y\u00f6nlendirme. SEO de\u011ferini b\u00fcy\u00fck oranda ta\u015f\u0131r.<\/li>\n<li><strong>302 Found \/ 307 Temporary Redirect:<\/strong> Ge\u00e7ici y\u00f6nlendirme. SEO de\u011feri ta\u015f\u0131maz; yaln\u0131zca ge\u00e7ici durumlar i\u00e7in kullan\u0131lmal\u0131d\u0131r.<\/li>\n<li><strong>304 Not Modified:<\/strong> Taray\u0131c\u0131 \u00f6nbelle\u011finde de\u011fi\u015fiklik yok; i\u00e7erik yeniden indirilmez. Performans i\u00e7in \u00f6nemlidir.<\/li>\n<\/ul>\n<p>Kal\u0131c\u0131 i\u00e7erik ta\u015f\u0131malar\u0131nda 301 kullanmak, &#8220;k\u0131sa bir s\u00fcreli\u011fine kapal\u0131y\u0131z&#8221; senaryolar\u0131nda 302\/307 tercih etmek do\u011fru yakla\u015f\u0131md\u0131r.<\/p>\n<h2>4xx ile 5xx Hatas\u0131n\u0131 H\u0131zl\u0131ca Ay\u0131rt Etmenin Pratik Yolu<\/h2>\n<p>Bir hata g\u00f6rd\u00fc\u011f\u00fcn\u00fczde \u00f6nce \u015fu soruyu sorun: <strong>Ayn\u0131 sayfa farkl\u0131 bir taray\u0131c\u0131da \/ farkl\u0131 bir cihazda \/ farkl\u0131 bir a\u011fdan a\u00e7\u0131l\u0131yor mu?<\/strong><\/p>\n<ul>\n<li><strong>Sadece sizde hata varsa:<\/strong> B\u00fcy\u00fck ihtimalle 4xx taraf\u0131ndas\u0131n\u0131z (\u00e7erez, oturum, IP, taray\u0131c\u0131 eklentisi).<\/li>\n<li><strong>Herkeste hata varsa:<\/strong> Sorun 5xx taraf\u0131ndad\u0131r (sunucu, uygulama, veritaban\u0131).<\/li>\n<li><strong>Belirli URL&#8217;lerde hata varsa:<\/strong> 404 ya da uygulama bug&#8217;\u0131.<\/li>\n<li><strong>Belirli saatlerde tekrarl\u0131yorsa:<\/strong> Y\u00fck, cron i\u015fi ya da yedek g\u00f6revleri ile \u00e7ak\u0131\u015f\u0131yor olabilir.<\/li>\n<\/ul>\n<h2>Site Sahibi Olarak HTTP Hatalar\u0131n\u0131 Nas\u0131l \u0130zlemelisiniz?<\/h2>\n<p>Hatalar\u0131n b\u00fcy\u00fck b\u00f6l\u00fcm\u00fc kullan\u0131c\u0131lar \u015fik\u00e2yet etmeden tespit edilebilir. \u0130zleme i\u00e7in \u00f6nerilen pratikler:<\/p>\n<ul>\n<li>Sunucu access log&#8217;lar\u0131n\u0131 d\u00fczenli analiz edin; 4xx ve 5xx oranlar\u0131n\u0131 grafikleyin.<\/li>\n<li>Uygulama taraf\u0131nda merkezi log toplama (ELK, Loki, Sentry) kurun; istisnalar\u0131n kaybolmas\u0131na izin vermeyin.<\/li>\n<li>Ba\u011f\u0131ms\u0131z uptime izleme servisleri (UptimeRobot, StatusCake, Better Stack) ile d\u0131\u015far\u0131dan kontrol ettirin.<\/li>\n<li>5xx oran\u0131 belirli bir e\u015fi\u011fi ge\u00e7ti\u011finde otomatik alarm \u00fcretin.<\/li>\n<li>\u00d6nemli sayfalar i\u00e7in synthetic monitoring (botla periyodik ziyaret) \u00e7al\u0131\u015ft\u0131r\u0131n.<\/li>\n<\/ul>\n<h2>Ziyaret\u00e7i Olarak Kar\u015f\u0131la\u015ft\u0131\u011f\u0131n\u0131z Hata \u0130\u00e7in H\u0131zl\u0131 Kontrol Listesi<\/h2>\n<ol>\n<li>Sayfay\u0131 yenileyin (Ctrl + F5 ile \u00f6nbelleksiz yenileme).<\/li>\n<li>URL&#8217;yi g\u00f6zden ge\u00e7irin; yaz\u0131m hatas\u0131 var m\u0131?<\/li>\n<li>Taray\u0131c\u0131 \u00e7erezlerini ve \u00f6nbelle\u011fini temizleyin.<\/li>\n<li>Farkl\u0131 bir taray\u0131c\u0131 \/ gizli pencere \/ mobil veri ile deneyin.<\/li>\n<li>VPN veya proxy kullan\u0131yorsan\u0131z devre d\u0131\u015f\u0131 b\u0131rak\u0131n.<\/li>\n<li>Sorun devam ediyorsa site sahibine ula\u015f\u0131n; ekran g\u00f6r\u00fcnt\u00fcs\u00fc ve tam URL payla\u015fmak \u00e7\u00f6z\u00fcm s\u00fcresini k\u0131salt\u0131r.<\/li>\n<\/ol>\n<h2>S\u0131k\u00e7a Sorulan Sorular<\/h2>\n<h3>HTTP error kodlar\u0131 SEO&#8217;yu etkiler mi?<\/h3>\n<p>Evet, do\u011frudan etkiler. 4xx oran\u0131 y\u00fcksek bir site, arama motorlar\u0131 i\u00e7in &#8220;bak\u0131ms\u0131z&#8221; sinyali verir. 5xx s\u00fcrekli tekrarl\u0131yorsa Googlebot tarama frekans\u0131n\u0131 d\u00fc\u015f\u00fcrebilir; bu da indeksleme sorunlar\u0131na yol a\u00e7ar. 301 yerine 302 kullanmak da SEO de\u011ferinin ta\u015f\u0131nmamas\u0131na neden olur.<\/p>\n<h3>&#8220;Bu site \u015fu anda eri\u015filemiyor&#8221; mesaj\u0131 hangi HTTP koduna kar\u015f\u0131l\u0131k gelir?<\/h3>\n<p>Genelde bu mesaj HTTP d\u00fczeyinde bir koddan de\u011fil, <strong>DNS \u00e7\u00f6z\u00fcmleme hatas\u0131<\/strong> ya da <strong>TCP ba\u011flant\u0131 reddi<\/strong>nden kaynaklan\u0131r; yani sunucuya hi\u00e7 ula\u015f\u0131lamam\u0131\u015ft\u0131r. HTTP kodu \u00fcretilebilmesi i\u00e7in en az\u0131ndan bir TCP el s\u0131k\u0131\u015fmas\u0131 gerekir.<\/p>\n<h3>500 hatas\u0131 m\u0131 502 hatas\u0131 m\u0131 daha k\u00f6t\u00fc?<\/h3>\n<p>\u0130kisi de ciddidir ama farkl\u0131 yerleri i\u015faret eder. 500 uygulaman\u0131z\u0131n kendi i\u00e7indeki bir hatad\u0131r; 502 ise \u00f6n plandaki sunucunun arka u\u00e7la konu\u015famamas\u0131d\u0131r. \u00c7\u00f6z\u00fcm \u00f6nceli\u011fi: 500 i\u00e7in uygulama logu, 502 i\u00e7in servis\/upstream sa\u011fl\u0131\u011f\u0131.<\/p>\n<h3>WordPress&#8217;te en s\u0131k g\u00f6r\u00fclen HTTP hatalar\u0131 hangileri?<\/h3>\n<p>500 Internal Server Error (eklenti \u00e7ak\u0131\u015fmas\u0131, PHP bellek), 502\/504 (yetersiz PHP-FPM kaynaklar\u0131), 403 (g\u00fcvenlik eklentisi), 404 (permalink bozulmas\u0131) en s\u0131k kar\u015f\u0131la\u015f\u0131lanlard\u0131r.<\/p>\n<h3>Hata sayfas\u0131 yerine \u00f6zel sayfa g\u00f6stermek gerekir mi?<\/h3>\n<p>Evet, \u00f6zellikle 404 ve 500 i\u00e7in. Markan\u0131za uygun, navigasyon i\u00e7eren bir hata sayfas\u0131 hem kullan\u0131c\u0131y\u0131 kaybetmemenizi sa\u011flar hem de &#8220;hangi ba\u011flant\u0131dan geldi&#8221; gibi analizleri kolayla\u015ft\u0131r\u0131r.<\/p>\n<h3>API geli\u015ftirirken hangi kodu d\u00f6nd\u00fcrmeliyim?<\/h3>\n<p>Genel kural: ba\u015far\u0131l\u0131 i\u015flemde 200\/201, do\u011frulama hatas\u0131nda 400, kimliksizse 401, yetkisizse 403, bulunamazsa 404, sunucuda yakalanmayan hatada 500. T\u00fcm hatalar\u0131 200 ile d\u00f6nd\u00fcr\u00fcp yan\u0131t g\u00f6vdesinde durum belirten yakla\u015f\u0131m, istemci hata y\u00f6netimini bozar; HTTP kodlar\u0131n\u0131 do\u011fru kullan\u0131n.<\/p>\n<h2>Sonu\u00e7<\/h2>\n<p>HTTP error kodlar\u0131, web&#8217;in sessiz te\u015fhis dilidir. 4xx kodlar\u0131 &#8220;iste\u011fi g\u00f6zden ge\u00e7ir&#8221;, 5xx kodlar\u0131 &#8220;sunucuyu g\u00f6zden ge\u00e7ir&#8221; der; 3xx kodlar\u0131 y\u00f6nlendirme kararlar\u0131n\u0131 ta\u015f\u0131r. Bir hatayla kar\u015f\u0131la\u015ft\u0131\u011f\u0131n\u0131zda paniklemek yerine kodun s\u0131n\u0131f\u0131na bakmak, ard\u0131ndan log ve servis durumunu kontrol etmek; \u00e7\u00f6z\u00fcm s\u00fcresini saatlerden dakikalara indirir. Site sahibiyseniz bu kodlar\u0131 aktif izlemek; ziyaret\u00e7iyseniz temel kontrol listesini uygulamak \u00e7o\u011fu sorunu h\u0131zla \u00e7\u00f6zmenizi sa\u011flar.<\/p>\n<p>Stabil bir altyap\u0131 ve d\u00fc\u015f\u00fck hata oran\u0131 i\u00e7in Kolan&#8217;\u0131n g\u00fc\u00e7l\u00fc izleme altyap\u0131s\u0131 e\u015fli\u011finde sundu\u011fu <strong>hosting ve sunucu \u00e7\u00f6z\u00fcmlerini<\/strong> <a href=\"https:\/\/kolan.net.tr\/hosting\">kolan.net.tr\/hosting<\/a> adresinden inceleyebilir, ihtiyac\u0131n\u0131za uygun paketi g\u00fcvenle se\u00e7ebilirsiniz.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bir web sitesini ziyaret ederken kar\u015f\u0131n\u0131za &#8220;404 Not Found&#8221;, &#8220;500 Internal Server Error&#8221; ya da &#8220;502 Bad Gateway&#8221; gibi bir mesaj \u00e7\u0131kt\u0131\u011f\u0131nda \u00e7o\u011funlukla ne yapaca\u011f\u0131n\u0131z\u0131&#8230;<\/p>\n","protected":false},"author":1,"featured_media":1491,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[126],"tags":[246,247,248,249,250,251,252,253,254,245,255],"class_list":["post-1490","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nedir-nasil-yapilir","tag-400-bad-request","tag-401-unauthorized","tag-403-forbidden","tag-404-not-found","tag-500-internal-server-error","tag-502-bad-gateway","tag-503-service-unavailable","tag-504-gateway-timeout","tag-http-durum-kodlari","tag-http-hata-kodlari","tag-http-status-code"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>HTTP Error Kodlar\u0131 ve \u00c7\u00f6z\u00fcmleri: 400, 500 ve Di\u011fer Yayg\u0131n Hatalar Rehberi - Kolan Bili\u015fim Teknolojileri | Blog - Dijital \u00c7\u00f6z\u00fcmler, Sunucu Y\u00f6netimi ve Teknoloji Haberleri<\/title>\n<meta name=\"description\" content=\"HTTP error kodlar\u0131 ne anlama gelir? 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