{"id":19858,"date":"2026-07-22T17:48:28","date_gmt":"2026-07-22T14:48:28","guid":{"rendered":"https:\/\/www.paytr.com\/?p=19858"},"modified":"2026-07-22T17:48:30","modified_gmt":"2026-07-22T14:48:30","slug":"odeme-akislarinda-callback-hatalari-neden-olusur","status":"publish","type":"post","link":"https:\/\/www.paytr.com\/en\/blog\/odeme-akislarinda-callback-hatalari-neden-olusur","title":{"rendered":"\u00d6deme Ak\u0131\u015flar\u0131nda Callback Hatalar\u0131 Neden Olu\u015fur?"},"content":{"rendered":"\n

Online \u00f6deme sistemleri<\/a>, kullan\u0131c\u0131 ile \u00f6deme altyap\u0131s\u0131 aras\u0131nda kesintisiz bir ileti\u015fim zinciri \u00fczerine kuruludur. Bu zincirin en kritik halkalar\u0131ndan biri callback mekanizmas\u0131d\u0131r. Bir \u00f6deme tamamland\u0131\u011f\u0131nda, iptal edildi\u011finde ya da hata ald\u0131\u011f\u0131nda \u00f6deme sa\u011flay\u0131c\u0131s\u0131, i\u015flem sonucunu sizin sunucunuza iletmek i\u00e7in bir callback iste\u011fi g\u00f6nderir. Bu iste\u011fin ba\u015far\u0131yla al\u0131nmas\u0131, i\u015flemin do\u011fru \u015fekilde kaydedilmesi ve kullan\u0131c\u0131ya do\u011fru bilginin g\u00f6sterilmesi a\u00e7\u0131s\u0131ndan do\u011frudan belirleyicidir.<\/p>\n\n\n\n

\"PayTR<\/figure>\n\n\n\n

Ancak pratikte callback hatalar\u0131 olduk\u00e7a s\u0131k kar\u015f\u0131la\u015f\u0131lan bir sorun olarak \u00f6ne \u00e7\u0131kar. Sunucu eri\u015fim problemlerinden yanl\u0131\u015f yap\u0131land\u0131r\u0131lm\u0131\u015f URL’lere, SSL sertifika hatalar\u0131ndan g\u00fcvenlik duvar\u0131 engellemelerine kadar pek \u00e7ok farkl\u0131 etken bu hatalar\u0131 tetikleyebilir. Sorun yaln\u0131zca teknik bir aksakl\u0131k gibi g\u00f6r\u00fcnse de sonu\u00e7lar\u0131 do\u011frudan i\u015f s\u00fcre\u00e7lerini etkiler: tamamlanan \u00f6demeler sisteme yans\u0131maz, sipari\u015fler ask\u0131da kal\u0131r, m\u00fc\u015fteri memnuniyeti d\u00fc\u015fer. \u00dcstelik bu hatalar\u0131n bir k\u0131sm\u0131 anl\u0131k olarak fark edilmez; sorun ancak m\u00fc\u015fteri \u015fik\u00e2yeti ya da finansal mutabakat s\u00fcrecinde g\u00fcn y\u00fcz\u00fcne \u00e7\u0131kar.<\/p>\n\n\n\n

Callback kavram\u0131n\u0131 temel d\u00fczeyde anlamak, hatalar\u0131n neden kaynakland\u0131\u011f\u0131n\u0131 somut senaryolarla ele almak ve bu hatalar\u0131 \u00f6nlemek i\u00e7in uygulanabilecek teknik y\u00f6ntemleri de\u011ferlendirmek, sa\u011fl\u0131kl\u0131 bir \u00f6deme altyap\u0131s\u0131 kurman\u0131n temel ad\u0131mlar\u0131d\u0131r. \u00d6deme altyap\u0131s\u0131n\u0131 y\u00f6neten geli\u015ftiriciler, e-ticaret operasyonunu takip eden giri\u015fimciler ve entegrasyon s\u00fcre\u00e7lerinde sorun ya\u015fayan ekipler i\u00e7in callback hatalar\u0131n\u0131 anlamak ve kal\u0131c\u0131 \u00e7\u00f6z\u00fcmler \u00fcretmek kritik bir \u00f6ncelik ta\u015f\u0131r.<\/p>\n\n\n\n

Callback Nedir?<\/strong><\/h2>\n\n\n\n

Callback, bir \u00f6deme i\u015flemi ger\u00e7ekle\u015fti\u011finde \u00f6deme sa\u011flay\u0131c\u0131s\u0131n\u0131n sizin belirledi\u011finiz bir URL’e otomatik olarak HTTP iste\u011fi g\u00f6ndermesidir. Bu istek, i\u015flemin durumunu, tutar\u0131n\u0131, referans numaras\u0131n\u0131 ve di\u011fer ilgili verileri i\u00e7erir. Sunucunuz bu iste\u011fi ald\u0131\u011f\u0131nda i\u015flemi veritaban\u0131na kaydeder, sipari\u015fi g\u00fcnceller ve gerekli i\u015f ak\u0131\u015flar\u0131n\u0131 tetikler.<\/p>\n\n\n\n

Callback mekanizmas\u0131, webhook olarak da adland\u0131r\u0131l\u0131r. Temel fark\u0131 \u015fudur: Kullan\u0131c\u0131 taray\u0131c\u0131s\u0131 \u00fczerinden d\u00f6nen y\u00f6nlendirmeler (redirect) yaln\u0131zca kullan\u0131c\u0131n\u0131n o an ba\u011fl\u0131 olmas\u0131na ba\u011fl\u0131yken, callback do\u011frudan sunucudan sunucuya ger\u00e7ekle\u015fir. Bu sayede kullan\u0131c\u0131 sayfay\u0131 kapasa, ba\u011flant\u0131s\u0131 kopsa ya da taray\u0131c\u0131y\u0131 yanl\u0131\u015fl\u0131kla kapatsa bile \u00f6deme bilgisi sisteme ula\u015fabilir. Bu yap\u0131, callback mekanizmas\u0131n\u0131 \u00f6deme ak\u0131\u015f\u0131n\u0131n en g\u00fcvenilir halkas\u0131 h\u00e2line getirir.<\/p>\n\n\n\n

Callback URL’si genellikle \u00f6deme sa\u011flay\u0131c\u0131s\u0131n\u0131n y\u00f6netim panelinde ya da API entegrasyonu s\u0131ras\u0131nda tan\u0131mlan\u0131r. Sa\u011flay\u0131c\u0131, i\u015flem sonucunda bu adrese bir POST iste\u011fi g\u00f6nderir. Sunucunun bu iste\u011fi almas\u0131, do\u011frulamas\u0131 ve ba\u015far\u0131l\u0131 bir HTTP yan\u0131t\u0131 d\u00f6nd\u00fcrmesi beklenir. T\u00fcm bu ad\u0131mlar\u0131n sorunsuz i\u015flemesi, \u00f6deme ak\u0131\u015f\u0131n\u0131n g\u00fcvenilir bi\u00e7imde tamamlanmas\u0131 anlam\u0131na gelir. Herhangi bir ad\u0131mda ya\u015fanan aksakl\u0131k ise callback hatas\u0131na d\u00f6n\u00fc\u015f\u00fcr ve bu hata sessizce birikmeye devam edebilir.<\/p>\n\n\n\n

Callback Hatalar\u0131n\u0131n Ba\u015fl\u0131ca Nedenleri?<\/strong><\/h2>\n\n\n\n
\"Sunucudan<\/figure>\n\n\n\n

Callback hatalar\u0131 tek bir nedene ba\u011fl\u0131 de\u011fildir; farkl\u0131 katmanlarda birden fazla etken ayn\u0131 anda devreye girebilir. Bu nedenle sorunu do\u011fru te\u015fhis etmek, \u00e7\u00f6z\u00fcm s\u00fcrecini do\u011frudan k\u0131salt\u0131r. Hatalar\u0131n kayna\u011f\u0131n\u0131 anlamadan yap\u0131lan m\u00fcdahaleler \u00e7o\u011fu zaman sorunu \u00e7\u00f6zmek yerine ertelemekle sonu\u00e7lan\u0131r. A\u015fa\u011f\u0131da en s\u0131k kar\u015f\u0131la\u015f\u0131lan hata kaynaklar\u0131na dikkat etmek gerekir:<\/p>\n\n\n\n

    \n
  • \u00a0Sunucunun callback iste\u011fi geldi\u011fi anda eri\u015filemez durumda olmas\u0131 ya da yan\u0131t vermekte gecikmesi, iste\u011fin ba\u015far\u0131s\u0131z say\u0131lmas\u0131na yol a\u00e7ar.<\/li>\n\n\n\n
  • \u00d6deme sa\u011flay\u0131c\u0131s\u0131na tan\u0131mlanan URL’nin hatal\u0131, eksik veya g\u00fcncel olmayan bir adrese i\u015faret etmesi, iste\u011fin hi\u00e7 ula\u015fmamas\u0131na neden olur.<\/li>\n\n\n\n
  • Ge\u00e7ersiz, s\u00fcresi dolmu\u015f ya da yanl\u0131\u015f yap\u0131land\u0131r\u0131lm\u0131\u015f SSL sertifikalar\u0131, sa\u011flay\u0131c\u0131n\u0131n g\u00fcvenli ba\u011flant\u0131 kuramamas\u0131na ve iste\u011fi reddetmesine yol a\u00e7ar.<\/li>\n\n\n\n
  • Sunucu taraf\u0131ndaki g\u00fcvenlik duvar\u0131 veya IP k\u0131s\u0131tlamalar\u0131n\u0131n \u00f6deme sa\u011flay\u0131c\u0131s\u0131n\u0131n IP adreslerini engellemesi, iste\u011fin sunucuya ula\u015fmas\u0131n\u0131 engeller.<\/li>\n\n\n\n
  • Callback iste\u011fi al\u0131nd\u0131\u011f\u0131nda sunucunun do\u011fru HTTP durum kodu d\u00f6nd\u00fcrmemesi, sa\u011flay\u0131c\u0131n\u0131n i\u015flemi ba\u015far\u0131s\u0131z kabul etmesine ve yeniden deneme d\u00f6ng\u00fcs\u00fc ba\u015flatmas\u0131na neden olur.<\/li>\n<\/ul>\n\n\n\n

    Bu nedenlerin her biri farkl\u0131 bir teknik katmanda ortaya \u00e7\u0131kar ve \u00e7\u00f6z\u00fcm yakla\u015f\u0131mlar\u0131 da buna g\u00f6re de\u011fi\u015fir. Do\u011fru te\u015fhis i\u00e7in \u00f6nce hangi katmanda sorun ya\u015fand\u0131\u011f\u0131n\u0131 belirlemek gerekir.<\/p>\n\n\n\n

    Sunucu eri\u015fim problemleri (timeout \/ downtime)<\/strong><\/h3>\n\n\n\n

    \u00d6deme sa\u011flay\u0131c\u0131s\u0131 callback iste\u011fini g\u00f6nderdi\u011finde sunucunun belirli bir s\u00fcre i\u00e7inde yan\u0131t vermesi beklenir. Sunucu o anda bak\u0131mda, a\u015f\u0131r\u0131 y\u00fck alt\u0131nda ya da tamamen eri\u015filemez durumdaysa istek zaman a\u015f\u0131m\u0131na u\u011frar ve ba\u015far\u0131s\u0131z olarak i\u015faretlenir.<\/p>\n\n\n\n

    Timeout senaryosu \u00f6zellikle dikkat gerektiren bir durumdur. Sunucu iste\u011fi alm\u0131\u015f olsa bile i\u015flemi tamamlamak i\u00e7in \u00e7ok uzun s\u00fcre harc\u0131yorsa sa\u011flay\u0131c\u0131 ba\u011flant\u0131y\u0131 keser. Bu durumda \u00f6deme ger\u00e7ekle\u015fmi\u015f olsa da sistem taraf\u0131nda kay\u0131t olu\u015fmaz. Yo\u011fun trafik d\u00f6nemlerinde bu t\u00fcr gecikmeler daha s\u0131k ya\u015fan\u0131r ve toplu sipari\u015f kay\u0131plar\u0131na neden olabilir.<\/p>\n\n\n\n

    Planl\u0131 bak\u0131m pencerelerinde callback URL’sinin ge\u00e7ici olarak y\u00f6nlendirilmesi ya da sa\u011flay\u0131c\u0131n\u0131n retry mekanizmas\u0131n\u0131n devreye girmesi i\u00e7in altyap\u0131n\u0131n haz\u0131r tutulmas\u0131, bu t\u00fcr kesintilerin etkisini azalt\u0131r.<\/p>\n\n\n\n

    Yanl\u0131\u015f callback URL konfig\u00fcrasyonu<\/strong><\/h3>\n\n\n\n

    Callback URL’sinin do\u011fru tan\u0131mlanmam\u0131\u015f olmas\u0131, hatalar\u0131n en yayg\u0131n ve en kolay g\u00f6zden ka\u00e7an nedenlerinden biridir. Bu t\u00fcr hatalar \u00e7o\u011funlukla entegrasyon a\u015famas\u0131nda de\u011fil, sonradan yap\u0131lan de\u011fi\u015fiklikler s\u0131ras\u0131nda ortaya \u00e7\u0131kar. A\u015fa\u011f\u0131daki durumlar bu kategoride s\u0131k\u00e7a kar\u015f\u0131la\u015f\u0131l\u0131r:<\/p>\n\n\n\n

      \n
    • URL’de yaz\u0131m hatas\u0131 bulunmas\u0131 ya da yanl\u0131\u015f bir path girilmesi, iste\u011fin var olmayan bir adrese g\u00f6nderilmesine neden olur.<\/li>\n\n\n\n
    • Test ortam\u0131 URL’sinin canl\u0131 ortamda da kullan\u0131lmaya devam etmesi, ger\u00e7ek \u00f6demelerin yanl\u0131\u015f sunucuya y\u00f6nlenmesine yol a\u00e7ar.<\/li>\n\n\n\n
    • HTTP ile HTTPS aras\u0131ndaki uyumsuzluk, baz\u0131 sa\u011flay\u0131c\u0131lar\u0131n iste\u011fi g\u00f6ndermemesine neden olabilir.<\/li>\n\n\n\n
    • Uygulama ta\u015f\u0131nd\u0131\u011f\u0131nda ya da domain de\u011fi\u015fti\u011finde \u00f6deme panelindeki URL’nin g\u00fcncellenmemesi, t\u00fcm callback isteklerinin ba\u015far\u0131s\u0131z olmas\u0131na yol a\u00e7ar.<\/li>\n<\/ul>\n\n\n\n

      Bu hatalar\u0131n b\u00fcy\u00fck \u00e7o\u011funlu\u011fu, entegrasyon sonras\u0131 yap\u0131lan basit bir do\u011frulama testiyle \u00f6nceden tespit edilebilir.<\/p>\n\n\n\n

      SSL ve g\u00fcvenlik sertifikas\u0131 sorunlar\u0131<\/strong><\/h3>\n\n\n\n

      \u00d6deme sa\u011flay\u0131c\u0131lar\u0131, callback isteklerini yaln\u0131zca g\u00fcvenli HTTPS ba\u011flant\u0131lar\u0131 \u00fczerinden kabul eder. Callback URL’sinin i\u015faret etti\u011fi sunucuda ge\u00e7erli bir SSL sertifikas\u0131 bulunmuyorsa ya da sertifika s\u00fcresi dolmu\u015fsa sa\u011flay\u0131c\u0131 ba\u011flant\u0131y\u0131 kurmay\u0131 reddeder. Bu durum, kullan\u0131c\u0131 taraf\u0131nda herhangi bir hata g\u00f6r\u00fcnmeksizin arka planda sessizce ger\u00e7ekle\u015fir.<\/p>\n\n\n\n

      \u00d6zellikle dikkat edilmesi gereken durumlar \u015funlard\u0131r: Self-signed (kendi imzal\u0131) sertifikalar \u00e7o\u011fu sa\u011flay\u0131c\u0131 taraf\u0131ndan g\u00fcvenilir kabul edilmez. Sertifika zincirinde eksik ara sertifika bulunmas\u0131 da ba\u011flant\u0131 hatalar\u0131na yol a\u00e7ar. Otomatik yenileme yap\u0131land\u0131r\u0131lmam\u0131\u015f sertifikalar\u0131n s\u00fcresi sessizce dolabilir ve bu durum fark edilmeden uzun s\u00fcre callback hatas\u0131 \u00fcretmeye devam edebilir.<\/p>\n\n\n\n

      Sertifika ge\u00e7erlili\u011fini d\u00fczenli aral\u0131klarla izlemek ve otomatik yenileme mekanizmalar\u0131n\u0131 aktif tutmak, bu t\u00fcr kesintileri b\u00fcy\u00fck \u00f6l\u00e7\u00fcde \u00f6nler.<\/p>\n\n\n\n

      IP whitelist \/ firewall engellemeleri<\/strong><\/h3>\n\n\n\n

      Sunucu taraf\u0131nda uygulanan g\u00fcvenlik duvar\u0131 kurallar\u0131 ya da IP k\u0131s\u0131tlamalar\u0131, \u00f6deme sa\u011flay\u0131c\u0131s\u0131ndan gelen isteklerin sunucuya ula\u015fmas\u0131n\u0131 engelleyebilir. Bu durumda callback iste\u011fi teknik olarak g\u00f6nderilmi\u015f olsa da sunucu taraf\u0131nda hi\u00e7bir iz b\u0131rakmadan d\u00fc\u015fer.<\/p>\n\n\n\n

      Sorunun sinsi yan\u0131 \u015fudur: Sunucu taraf\u0131nda herhangi bir hata logu olu\u015fmaz \u00e7\u00fcnk\u00fc istek sunucuya hi\u00e7 ula\u015fmam\u0131\u015ft\u0131r. Hata yaln\u0131zca \u00f6deme sa\u011flay\u0131c\u0131s\u0131n\u0131n loglar\u0131nda g\u00f6r\u00fcn\u00fcr. Bu nedenle sorun tespiti s\u0131ras\u0131nda yaln\u0131zca sunucu loglar\u0131na bakmak yan\u0131lt\u0131c\u0131 olabilir.<\/p>\n\n\n\n

      \u00c7\u00f6z\u00fcm i\u00e7in \u00f6deme sa\u011flay\u0131c\u0131s\u0131n\u0131n yay\u0131mlad\u0131\u011f\u0131 IP adresi listesinin g\u00fcvenlik duvar\u0131 kurallar\u0131na eklenmesi gerekir. Sa\u011flay\u0131c\u0131 IP aral\u0131klar\u0131n\u0131 g\u00fcncelledi\u011finde bu listenin de g\u00fcncellenmesi \u00f6nemlidir. Aksi h\u00e2lde yeni IP’lerden gelen istekler yine engellenmeye devam eder.<\/p>\n\n\n\n

      Yanl\u0131\u015f HTTP response y\u00f6netimi (200 OK d\u00f6n\u00fclmemesi)<\/strong><\/h3>\n\n\n\n
      \"\u00d6deme<\/figure>\n\n\n\n

      Sunucu callback iste\u011fini ba\u015far\u0131yla alsa bile yanl\u0131\u015f HTTP durum kodu d\u00f6nd\u00fcrmesi, sa\u011flay\u0131c\u0131n\u0131n i\u015flemi ba\u015far\u0131s\u0131z saymas\u0131na neden olur. Bu durum gereksiz yeniden deneme d\u00f6ng\u00fclerine ve veri tutars\u0131zl\u0131klar\u0131na yol a\u00e7ar. Callback hatalar\u0131 aras\u0131nda en s\u0131k g\u00f6zden ka\u00e7an nedenlerden biri de budur. Dikkat edilmesi gereken yayg\u0131n senaryolar \u015funlard\u0131r:<\/p>\n\n\n\n

        \n
      • \u0130\u015flem ba\u015far\u0131yla kaydedilmi\u015f olsa bile sunucunun hata kodu d\u00f6nd\u00fcrmesi, sa\u011flay\u0131c\u0131n\u0131n ayn\u0131 iste\u011fi tekrar g\u00f6ndermesine neden olur.<\/li>\n\n\n\n
      • Y\u00f6nlendirme (redirect) yan\u0131t\u0131 d\u00f6nd\u00fcr\u00fclmesi, baz\u0131 sa\u011flay\u0131c\u0131lar taraf\u0131ndan ba\u015far\u0131s\u0131z kabul edilir.<\/li>\n\n\n\n
      • Sunucu taraf\u0131nda i\u015flenmeyen bir istisna (exception) olu\u015fmas\u0131 ve bunun hata kodu olarak yans\u0131mas\u0131, sa\u011flay\u0131c\u0131n\u0131n iste\u011fi ge\u00e7ersiz saymas\u0131na yol a\u00e7ar.<\/li>\n\n\n\n
      • Yan\u0131t\u0131n \u00e7ok ge\u00e7 d\u00f6nd\u00fcr\u00fclmesi, sa\u011flay\u0131c\u0131n\u0131n ba\u011flant\u0131y\u0131 zaman a\u015f\u0131m\u0131 nedeniyle kapatmas\u0131na neden olabilir.<\/li>\n<\/ul>\n\n\n\n

        En S\u0131k G\u00f6r\u00fclen Teknik Senaryolar<\/strong><\/h2>\n\n\n\n

        Callback hatalar\u0131n\u0131n pratikte nas\u0131l ortaya \u00e7\u0131kt\u0131\u011f\u0131n\u0131 anlamak, sorunlar\u0131 daha h\u0131zl\u0131 te\u015fhis etmeyi sa\u011flar. Ger\u00e7ek entegrasyon s\u00fcre\u00e7lerinde en s\u0131k kar\u015f\u0131la\u015f\u0131lan teknik senaryolar belirli kal\u0131plar izler ve bu kal\u0131plar\u0131 tan\u0131mak \u00e7\u00f6z\u00fcm s\u00fcrecini \u00f6nemli \u00f6l\u00e7\u00fcde k\u0131salt\u0131r.<\/p>\n\n\n\n

        Birinci yayg\u0131n senaryo, canl\u0131ya ge\u00e7i\u015f s\u0131ras\u0131nda test URL’sinin de\u011fi\u015ftirilmemesidir. Geli\u015ftirme ortam\u0131nda \u00e7al\u0131\u015fan entegrasyon, canl\u0131 ortama ta\u015f\u0131nd\u0131\u011f\u0131nda \u00f6deme panelindeki callback adresi g\u00fcncellenmez. T\u00fcm ger\u00e7ek \u00f6demeler test sunucusuna y\u00f6nlenir ve sipari\u015f sistemi hi\u00e7bir bildirim almaz.<\/p>\n\n\n\n

        \u0130kinci senaryo, sertifika yenileme sonras\u0131 olu\u015fan uyumsuzluktur. Yeni sertifika kurulurken ara sertifika zinciri eksik b\u0131rak\u0131l\u0131r. Taray\u0131c\u0131lar bu durumu tolere edebilirken \u00f6deme sa\u011flay\u0131c\u0131s\u0131n\u0131n sunucu tarafl\u0131 iste\u011fi ba\u015far\u0131s\u0131z olur.<\/p>\n\n\n\n

        \u00dc\u00e7\u00fcnc\u00fc senaryo, veritaban\u0131 i\u015fleminin callback yan\u0131t\u0131ndan \u00f6nce tamamlanamamas\u0131d\u0131r. Sunucu iste\u011fi al\u0131r, veritaban\u0131na yazmaya \u00e7al\u0131\u015f\u0131r ancak bu i\u015flem uzun s\u00fcrer. Sa\u011flay\u0131c\u0131 yan\u0131t beklerken ba\u011flant\u0131y\u0131 keser. Sunucu ise i\u015flemi tamamlad\u0131ktan sonra kimseye yan\u0131t veremez h\u00e2le gelir.<\/p>\n\n\n\n

        Bu senaryolar\u0131n ortak \u00f6zelli\u011fi, hatalar\u0131n anl\u0131k de\u011fil gecikmeli fark edilmesidir. M\u00fc\u015fteri \u00f6demeyi yapm\u0131\u015f, ancak sipari\u015f sisteme d\u00fc\u015fmemi\u015ftir. Her senaryo i\u00e7in ayr\u0131 bir te\u015fhis ve \u00e7\u00f6z\u00fcm yakla\u015f\u0131m\u0131 gerekir.<\/p>\n\n\n\n

        Callback Hatalar\u0131n\u0131n Sonu\u00e7lar\u0131<\/strong><\/h2>\n\n\n\n

        Callback hatalar\u0131n\u0131n etkisi yaln\u0131zca teknik bir log kayd\u0131yla s\u0131n\u0131rl\u0131 kalmaz. \u0130\u015f s\u00fcre\u00e7lerine yans\u0131yan somut sonu\u00e7lar do\u011furur ve bu sonu\u00e7lar zaman i\u00e7inde birikir.<\/p>\n\n\n\n

        En do\u011frudan etki sipari\u015f y\u00f6netiminde g\u00f6r\u00fcl\u00fcr. \u00d6deme tamamlanm\u0131\u015f ancak sistem bunu kaydetmemi\u015ftir. Sipari\u015f “beklemede” ya da “\u00f6denmedi” olarak g\u00f6r\u00fcn\u00fcr. M\u00fc\u015fteri \u00f6deme yapt\u0131\u011f\u0131n\u0131 d\u00fc\u015f\u00fcn\u00fcrken i\u015fletme taraf\u0131nda onay olu\u015fmaz. Bu durum hem m\u00fc\u015fteri ileti\u015fimini hem de lojistik s\u00fcre\u00e7leri sekteye u\u011frat\u0131r. \u00d6zellikle yo\u011fun d\u00f6nemlerde bu t\u00fcr aksakl\u0131klar h\u0131zla b\u00fcy\u00fcyerek operasyonel kriz noktas\u0131na d\u00f6n\u00fc\u015febilir.<\/p>\n\n\n\n

        Finansal mutabakat s\u00fcre\u00e7leri de do\u011frudan etkilenir. \u00d6deme sa\u011flay\u0131c\u0131s\u0131n\u0131n raporlar\u0131yla i\u015fletmenin i\u00e7 kay\u0131tlar\u0131 aras\u0131nda tutars\u0131zl\u0131k olu\u015fur. Bu farklar\u0131 kapatmak manuel i\u015f y\u00fck\u00fc gerektirir ve hata riski ta\u015f\u0131r.<\/p>\n\n\n\n

        M\u00fc\u015fteri deneyimi a\u00e7\u0131s\u0131ndan ise sonu\u00e7 genellikle \u015f\u00fcphe ve g\u00fcvensizliktir. \u00d6deme yapan ancak onay alamayan kullan\u0131c\u0131 destek ekibine ula\u015f\u0131r, i\u015flemi tekrar yapmaya \u00e7al\u0131\u015f\u0131r ya da do\u011frudan m\u00fc\u015fteri hizmetlerine \u015fik\u00e2yet iletir. Her biri operasyonel maliyet olu\u015fturan bu durumlar, callback hatalar\u0131n\u0131n teknik bir sorunun \u00e7ok \u00f6tesine ge\u00e7ti\u011fini g\u00f6sterir.<\/p>\n\n\n\n

        Uzun vadede \u00e7\u00f6z\u00fcms\u00fcz kalan callback hatalar\u0131, \u00f6deme altyap\u0131s\u0131na duyulan g\u00fcveni a\u015f\u0131nd\u0131r\u0131r ve entegrasyon kalitesini sorgulat\u0131r.<\/p>\n\n\n\n

        Callback Hatalar\u0131 Nas\u0131l \u00d6nlenir?<\/strong><\/h2>\n\n\n\n

        Callback hatalar\u0131n\u0131 tamamen s\u0131f\u0131rlamak m\u00fcmk\u00fcn olmayabilir; ancak do\u011fru mimari kararlar ve izleme al\u0131\u015fkanl\u0131klar\u0131yla bu hatalar\u0131n etkisi b\u00fcy\u00fck \u00f6l\u00e7\u00fcde azalt\u0131labilir. \u00d6nleme yakla\u015f\u0131m\u0131 \u00fc\u00e7 temel eksende \u015fekillenir: dayan\u0131kl\u0131 bir altyap\u0131 kurmak, gelen istekleri do\u011fru do\u011frulamak ve sistemi s\u00fcrekli izlemek.<\/p>\n\n\n\n

        Dayan\u0131kl\u0131 altyap\u0131, yaln\u0131zca sunucunun ayakta olmas\u0131ndan ibaret de\u011fildir. Callback endpoint’inin h\u0131zl\u0131 yan\u0131t vermesi, gereksiz i\u015flemleri asenkron kuyru\u011fa almas\u0131 ve her ko\u015fulda do\u011fru HTTP yan\u0131t\u0131 d\u00f6nd\u00fcrmesi gerekir. Ayn\u0131 iste\u011fin birden fazla kez gelmesi durumunda sistemin tutarl\u0131 davranmas\u0131 da bu kapsamda de\u011ferlendirilir. Altyap\u0131 tasar\u0131m\u0131 yap\u0131l\u0131rken bu senaryolar ba\u015ftan g\u00f6z \u00f6n\u00fcnde bulundurulmal\u0131d\u0131r.<\/p>\n\n\n\n

        Do\u011frulama katman\u0131, gelen iste\u011fin ger\u00e7ekten \u00f6deme sa\u011flay\u0131c\u0131s\u0131ndan geldi\u011fini teyit eder. Bu ad\u0131m atland\u0131\u011f\u0131nda sahte callback istekleriyle sistem manip\u00fcle edilebilir ve ciddi g\u00fcvenlik a\u00e7\u0131klar\u0131 olu\u015fabilir.<\/p>\n\n\n\n

        \u0130zleme sistemi ise hatalar\u0131n fark edilme s\u00fcresini k\u0131salt\u0131r. Bir callback ba\u015far\u0131s\u0131z oldu\u011funda bunu an\u0131nda g\u00f6rebilmek, manuel m\u00fcdahale s\u00fcresini \u00f6nemli \u00f6l\u00e7\u00fcde azalt\u0131r. Proaktif izleme olmadan hatalar ancak m\u00fc\u015fteri \u015fik\u00e2yetiyle g\u00fcn y\u00fcz\u00fcne \u00e7\u0131kar; bu da hem ge\u00e7 hem de maliyetli bir tespittir.<\/p>\n\n\n\n

        Retry destekli callback mekanizmas\u0131 kurmak H3: Webhook do\u011frulama ve signature kontrol\u00fc<\/strong><\/h3>\n\n\n\n

        Retry (yeniden deneme) mekanizmas\u0131, callback iste\u011finin ilk seferde ba\u015far\u0131s\u0131z olmas\u0131 durumunda sa\u011flay\u0131c\u0131n\u0131n iste\u011fi belirli aral\u0131klarla tekrar g\u00f6ndermesini sa\u011flar. Bu \u00f6zellik \u00e7o\u011fu \u00f6deme sa\u011flay\u0131c\u0131s\u0131 taraf\u0131ndan sunulur ve ge\u00e7ici sunucu kesintilerinin etkisini \u00f6nemli \u00f6l\u00e7\u00fcde azalt\u0131r. Retry mekanizmas\u0131ndan tam anlam\u0131yla yararlanabilmek i\u00e7in endpoint’in her tekrar denemesinde tutarl\u0131 bi\u00e7imde yan\u0131t verebilir durumda olmas\u0131 gerekir.<\/p>\n\n\n\n

        Webhook do\u011frulama ise gelen iste\u011fin ger\u00e7ekten \u00f6deme sa\u011flay\u0131c\u0131s\u0131ndan geldi\u011fini teyit etmek i\u00e7in kullan\u0131l\u0131r. Sa\u011flay\u0131c\u0131lar genellikle her iste\u011fe bir imza (signature) ekler. Bu imzan\u0131n sunucu taraf\u0131nda do\u011frulanmas\u0131, sahte ya da manip\u00fcle edilmi\u015f isteklerin i\u015fleme al\u0131nmas\u0131n\u0131 engeller. \u0130mza do\u011frulamas\u0131 atland\u0131\u011f\u0131nda sistem d\u0131\u015far\u0131dan gelen sahte verilerle yan\u0131lt\u0131labilir. Bu iki mekanizman\u0131n birlikte kullan\u0131lmas\u0131, hem g\u00fcvenilirli\u011fi hem de g\u00fcvenli\u011fi art\u0131r\u0131r.<\/p>\n\n\n\n

        Idempotent (tekrarlanabilir g\u00fcvenli) endpoint tasar\u0131m\u0131<\/strong><\/h3>\n\n\n\n

        Idempotent endpoint, ayn\u0131 iste\u011fin birden fazla kez g\u00f6nderilmesi durumunda sistemin her seferinde ayn\u0131 sonucu \u00fcretmesini ve yan etki olu\u015fturmamas\u0131n\u0131 ifade eder. Retry mekanizmas\u0131 devreye girdi\u011finde ayn\u0131 callback iste\u011fi birka\u00e7 kez ula\u015fabilir. E\u011fer endpoint idempotent de\u011filse ayn\u0131 sipari\u015f birden fazla kez olu\u015fturulabilir ya da ayn\u0131 \u00f6deme tekrar tekrar kaydedilebilir. Bu t\u00fcr \u00e7ift kay\u0131t sorunlar\u0131 hem finansal hem de operasyonel a\u00e7\u0131dan ciddi sonu\u00e7lar do\u011furur.<\/p>\n\n\n\n

        Bunu \u00f6nlemek i\u00e7in her callback iste\u011fine \u00f6zg\u00fc bir i\u015flem kimli\u011fi (transaction ID veya idempotency key) kullan\u0131l\u0131r. Sunucu bu kimli\u011fi daha \u00f6nce i\u015fleyip i\u015flemedi\u011fini kontrol eder; i\u015flediyse yeni bir kay\u0131t olu\u015fturmadan ba\u015far\u0131l\u0131 yan\u0131t d\u00f6nd\u00fcr\u00fcr. Bu yakla\u015f\u0131m, retry senaryolar\u0131nda veri b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc korur ve \u00e7ift kay\u0131t sorunlar\u0131n\u0131 ortadan kald\u0131r\u0131r.<\/p>\n\n\n\n

        Loglama ve izleme sistemleri kullanmak<\/strong><\/h3>\n\n\n\n

        Her callback iste\u011finin al\u0131nd\u0131\u011f\u0131 an, i\u00e7eri\u011fi ve sonucu kay\u0131t alt\u0131na al\u0131nmal\u0131d\u0131r. Bu loglar, hata an\u0131nda neyin yanl\u0131\u015f gitti\u011fini anlamak i\u00e7in birincil kaynakt\u0131r. Loglama olmadan sorun tespiti b\u00fcy\u00fck \u00f6l\u00e7\u00fcde tahmine dayal\u0131 h\u00e2le gelir ve \u00e7\u00f6z\u00fcm s\u00fcreci gereksiz yere uzar.<\/p>\n\n\n\n

        \u0130zleme sistemleri ise loglar\u0131n \u00f6tesine ge\u00e7er. Belirli bir s\u00fcre i\u00e7inde callback al\u0131nmad\u0131\u011f\u0131nda ya da ba\u015far\u0131s\u0131z istek oran\u0131 y\u00fckseldi\u011finde otomatik uyar\u0131 \u00fcretmesi, ekibin sorunu m\u00fc\u015fteri \u015fik\u00e2yetinden \u00f6nce fark etmesini sa\u011flar. Callback endpoint’inin yan\u0131t s\u00fcresi, ba\u015far\u0131 oran\u0131 ve hata da\u011f\u0131l\u0131m\u0131 gibi metrikler d\u00fczenli olarak takip edildi\u011finde altyap\u0131daki zay\u0131f noktalar proaktif bi\u00e7imde tespit edilebilir ve callback hatalar\u0131 sistematik bi\u00e7imde azalt\u0131labilir.<\/p>\n\n\n\n

        S\u0131k Sorulan Sorular<\/strong><\/h2>\n\n\n\n

        Callback nedir ve \u00f6deme sistemlerinde ne i\u015fe yarar?<\/strong><\/h3>\n\n\n\n

        Callback, \u00f6deme i\u015flemi tamamland\u0131\u011f\u0131nda \u00f6deme sa\u011flay\u0131c\u0131s\u0131n\u0131n sizin sunucunuza otomatik olarak HTTP iste\u011fi g\u00f6ndermesidir. \u0130\u015flem durumu, tutar\u0131 ve referans numaras\u0131 bu istekle iletilir. Kullan\u0131c\u0131 taray\u0131c\u0131y\u0131 kapasa bile sunucudan sunucuya ileti\u015fim sayesinde \u00f6deme bilgisi sisteme ula\u015f\u0131r.<\/p>\n\n\n\n

        Callback ile redirect aras\u0131ndaki temel fark nedir?<\/strong><\/h3>\n\n\n\n

        Redirect, kullan\u0131c\u0131n\u0131n taray\u0131c\u0131s\u0131 \u00fczerinden ger\u00e7ekle\u015fen bir y\u00f6nlendirmedir ve kullan\u0131c\u0131n\u0131n o an ba\u011fl\u0131 olmas\u0131na ba\u011fl\u0131d\u0131r. Callback ise do\u011frudan sunucudan sunucuya ileti\u015fim kurdu\u011fundan kullan\u0131c\u0131n\u0131n ba\u011flant\u0131 durumundan ba\u011f\u0131ms\u0131z \u00e7al\u0131\u015f\u0131r ve \u00f6deme ak\u0131\u015f\u0131n\u0131n daha g\u00fcvenilir halkas\u0131n\u0131 olu\u015fturur.<\/p>\n\n\n\n

        Callback hatalar\u0131 neden olu\u015fur?<\/strong><\/h3>\n\n\n\n

        Callback hatalar\u0131 tek bir nedene ba\u011fl\u0131 de\u011fildir. Sunucunun eri\u015filemez olmas\u0131, hatal\u0131 veya g\u00fcncel olmayan URL tan\u0131mlar\u0131, SSL sertifika sorunlar\u0131 ve g\u00fcvenlik duvar\u0131 engellemeleri en s\u0131k kar\u015f\u0131la\u015f\u0131lan nedenler aras\u0131ndad\u0131r. Farkl\u0131 katmanlarda birden fazla etken ayn\u0131 anda devreye girebilir.<\/p>\n\n\n\n

        Callback hatalar\u0131 i\u015f s\u00fcre\u00e7lerini nas\u0131l etkiler?<\/strong><\/h3>\n\n\n\n

        Tamamlanan \u00f6demeler sisteme yans\u0131maz, sipari\u015fler ask\u0131da kal\u0131r ve m\u00fc\u015fteri memnuniyeti olumsuz etkilenir. \u00dcstelik bu hatalar\u0131n bir k\u0131sm\u0131 anl\u0131k fark edilmez; sorun genellikle m\u00fc\u015fteri \u015fik\u00e2yeti ya da finansal mutabakat s\u00fcrecinde ortaya \u00e7\u0131kar.<\/p>\n\n\n\n

        Callback URL’si nerede tan\u0131mlan\u0131r?<\/strong><\/h3>\n\n\n\n

        Callback URL’si genellikle \u00f6deme sa\u011flay\u0131c\u0131s\u0131n\u0131n y\u00f6netim panelinde ya da API entegrasyonu s\u0131ras\u0131nda belirlenir. Sa\u011flay\u0131c\u0131, i\u015flem sonucunda bu adrese POST iste\u011fi g\u00f6nderir. Sunucunun iste\u011fi almas\u0131, do\u011frulamas\u0131 ve ba\u015far\u0131l\u0131 bir HTTP yan\u0131t\u0131 d\u00f6nd\u00fcrmesi gerekir.<\/p>\n\n\n\n

        Callback hatalar\u0131n\u0131 \u00f6nlemek i\u00e7in ne yap\u0131lmal\u0131d\u0131r?<\/strong><\/h3>\n\n\n\n

        Callback hatalar\u0131n\u0131 \u00f6nlemek i\u00e7in sunucu eri\u015filebilirli\u011finin s\u00fcrekli izlenmesi, URL tan\u0131mlar\u0131n\u0131n g\u00fcncel tutulmas\u0131, SSL sertifikalar\u0131n\u0131n ge\u00e7erlili\u011finin kontrol edilmesi ve g\u00fcvenlik duvar\u0131 kurallar\u0131n\u0131n do\u011fru yap\u0131land\u0131r\u0131lmas\u0131 gerekir. Hatalar\u0131n kayna\u011f\u0131n\u0131 do\u011fru te\u015fhis etmek \u00e7\u00f6z\u00fcm s\u00fcrecini \u00f6nemli \u00f6l\u00e7\u00fcde k\u0131salt\u0131r.<\/p>\n","protected":false},"excerpt":{"rendered":"

        Online \u00f6deme sistemleri, kullan\u0131c\u0131 ile \u00f6deme altyap\u0131s\u0131 aras\u0131nda kesintisiz bir ileti\u015fim zinciri \u00fczerine kuruludur. Bu zincirin en kritik halkalar\u0131ndan biri callback mekanizmas\u0131d\u0131r. Bir \u00f6deme tamamland\u0131\u011f\u0131nda, iptal edildi\u011finde ya da hata ald\u0131\u011f\u0131nda \u00f6deme sa\u011flay\u0131c\u0131s\u0131, i\u015flem sonucunu sizin sunucunuza iletmek i\u00e7in bir callback iste\u011fi g\u00f6nderir. Bu iste\u011fin ba\u015far\u0131yla al\u0131nmas\u0131, i\u015flemin do\u011fru \u015fekilde kaydedilmesi ve kullan\u0131c\u0131ya do\u011fru bilginin […]<\/p>\n","protected":false},"author":19,"featured_media":19863,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48,43,107],"tags":[],"class_list":["post-19858","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ipuclari","category-is-dunyasi","category-sanal-pos"],"acf":[],"yoast_head":"\n\u00d6deme Ak\u0131\u015flar\u0131nda Callback Hatalar\u0131 Neden Olu\u015fur? | PayTR<\/title>\n<meta name=\"description\" content=\"Online \u00f6deme sistemleri, kullan\u0131c\u0131 ile \u00f6deme altyap\u0131s\u0131 aras\u0131nda kesintisiz bir ileti\u015fim zinciri \u00fczerine kuruludur. 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