HTTP/2 (Hypertext Transfer Protocol version 2 ã®ç¥) ã¯ãWeb ãµã€ããš Web ã¢ããªã±ãŒã·ã§ã³ã®ããã©ãŒãã³ã¹ãåäžãããããã«ç¹å¥ã«èšèšããããã€ã³ã¿ãŒãããéä¿¡ãããã³ã«ã®äžçã«ãããå€§å¹ ãªé²æ©ã§ããå身㮠HTTP/1.1 ã®é²åãšããŠãHTTP/2 ã¯ãªã³ã©ã€ã³ ãã©ã³ã¶ã¯ã·ã§ã³ã®é床ãå¹çãã»ãã¥ãªãã£ãåäžãããå šäœçãªãŠãŒã¶ãŒ ãšã¯ã¹ããªãšã³ã¹ãåäžãããããšãç®çãšããŠããŸããããã¯ã仿¥ã®è€éãªããžã¿ã«ç°å¢ã§æåããããã«éåžžã«éèŠã§ãããç¹ã«no-codeAppMasterãªã©ã®no-codeãã©ãããã©ãŒã ã
2015 幎ã«å°å ¥ããã HTTP/2 ã¯ãHTTP/1.1 ã®è€æ°ã®å¶éãšéå¹çæ§ã«å¯ŸåŠããããã€ãã®æ°æ©èœãçµã¿èŸŒãã§ããŸãããããã®äž»ãªé²æ©ã«ã¯ããã€ã㪠ãã¬ãŒã åãå€éåãããããŒå§çž®ãåªå é äœä»ãããµãŒã㌠ããã·ã¥ãå«ãŸããŸãããããã®æ©èœãçµã¿åãããããšã§ãHTTP/2 㯠Web ã³ã³ãã³ããããå¹ççãã€ç¢ºå®ã«é ä¿¡ã§ããããã«ãªããã€ã³ã¿ãŒãããããŸã æ°ãããèŠæ±ãå€§å¹ ã«äœãã£ã 1990 幎代åŸåã«éçºããã以åã®ããŒãžã§ã³ã®æ¬ ç¹ãä¿®æ£ã§ããŸãã
ãã€ã㪠ãã¬ãŒã åã¯ãã¢ããªã±ãŒã·ã§ã³ ããŒã¿ã HTTP/2 ãã¬ãŒã ã«ã«ãã»ã«åããããã»ã¹ã§ãã HTTP/1.1 ã®äººéãå€èªã§ããããã¹ã圢åŒãšã¯ç°ãªãããã¬ãŒã ã¯ãã€ããªã§ãšã³ã³ãŒããããŠãããããè§£æãç°¡çŽ åããã誀解ã®ãªã¹ã¯ã軜æžãããããå¹ççãªåŠçãå¯èœã«ãªããŸããããã«ããããã®ãã¬ãŒã ã 1 ã€ã®æ¥ç¶ã«çµåã§ãããããå©çšå¯èœãªåž¯åå¹ ãæå¹ã«æŽ»çšããããããã¯ãŒã¯å šäœã®äœ¿çšçãåäžããŸãã
HTTP/2 ã§ã®å€éåã«ãããåäžã®æ¥ç¶äžã§è€æ°ã®ã¹ããªãŒã ãåæã«éä¿¡ã§ããããã«ãªããHTTP/1.1 ã«ååšããè¡é ãããã¯ã®åé¡ã«å¹æçã«å¯ŸåŠã§ããŸããè¡é ãããã¯ã¯ãèŠæ±ãé ãã忢ããŠããããã«ä»ã®èŠæ±ã®åŠçã劚ããããå¹çãå€§å¹ ã«äœäžããå Žåã«çºçããŸããå€éåã«ãããHTTP/2 ã¯ãªã¯ãšã¹ããšã¬ã¹ãã³ã¹ã®åæè»¢éãå¯èœã«ããæçµçã«ãšã³ãããŒãšã³ãã®éä¿¡ãšããŒãžã®èªã¿èŸŒã¿æéãççž®ããŸãã
ããããŒå§çž®ã¯ãHTTP/2 ã«ãã£ãŠæäŸããããã 1 ã€ã®éèŠãªæé©åã§ãã HPACK ãšåŒã°ããç¬èªã®ã¢ã«ãŽãªãºã ã䜿çšããŠãèŠæ±ããããŒãšå¿çããããŒã§éä¿¡ãããããŒã¿ãå§çž®ããŸãã HTTP/2 ã¯ããããŒã®ãµã€ãºãå°ããããããšã§ããããã¯ãŒã¯äžã§è»¢éããå¿ èŠãããããŒã¿ã®éãæå°éã«æããããã«ãã£ãŠåŸ ã¡æéãççž®ããWeb éä¿¡ã®å šäœçãªé床ãåäžãããŸãã
HTTP/2 ã®åªå é äœä»ãã«ãããWeb ãã©ãŠã¶ãªã©ã®ã¯ã©ã€ã¢ã³ãã¯è€æ°ã®ãªãœãŒã¹ã®çžå¯ŸçãªéèŠæ§ã瀺ãããšãã§ããŸããããã«ããããµãŒããŒã¯ãªãœãŒã¹ãå¹ççã«å²ãåœãŠãç·æ¥æ§ã®äœããªã¯ãšã¹ããããå ã«ãããéèŠãªãªã¯ãšã¹ãã«å¯ŸåŠã§ããããã«ãªããŸããããã«ããããŠãŒã¶ãŒã¯èªã¿èŸŒã¿æéãççž®ãããWeb ãµã€ãã Web ã¢ããªã±ãŒã·ã§ã³ãšã®ããåããããã¹ã ãŒãºã«ãªããŸãã
HTTP/2 ã®ãã 1 ã€ã®æ³šç®ãã¹ãæ©èœã¯ãµãŒã㌠ããã·ã¥ã§ããããã«ãããã¯ã©ã€ã¢ã³ãããªãœãŒã¹ãèŠæ±ããåã§ãããµãŒããŒããªãœãŒã¹ãã¯ã©ã€ã¢ã³ãã«å å¶ããŠéä¿¡ã§ããããã«ãªããŸãããã®ã¡ã«ããºã ã«ããããã©ãŠã¶ãŒãã³ã³ãã³ãã®ã¬ã³ããªã³ã°ãããè¿ éã«éå§ã§ãããããWeb ããŒãžã®äœæçãªèªã¿èŸŒã¿æéãå€§å¹ ã«ççž®ã§ããŸãã
HTTP/2 ã§å°å ¥ããã匷åãªæ©èœã¹ã€ãŒããèæ ®ãããšããã®ãããã³ã«ãã€ã³ã¿ãŒãããå šäœã§ãç¹ã«ããžã¿ã«ã§ã®ååšæã倧ããäŒæ¥ãçµç¹ã§åºãæ¡çšãããŠããããšã¯é©ãã¹ãããšã§ã¯ãããŸãããæè¿ã®æšå®ã«ãããšãHTTP/2 ã¯ãã¹ãŠã® Web ãµã€ã ãã©ãã£ãã¯ã® 40% 以äžãå ããææ°ã® Web ãã©ãŠã¶ã® 95% 以äžã§ãµããŒããããŠããŸãã
AppMasterno-codeãã©ãããã©ãŒã ã®ã³ã³ããã¹ãã§ã¯ãHTTP/2 ã¯ãéçºè ãã¹ã±ãŒã©ãã«ã§é«æ§èœãã€å®å šãªã¢ããªã±ãŒã·ã§ã³ãæ§ç¯ã§ããããã«ããäžã§éèŠãªåœ¹å²ãæãããŸãã HTTP/2 ã«ãã£ãŠæäŸãããæé©åãå©çšããããšã§ã AppMasterã¢ããªã±ãŒã·ã§ã³ãåªããããã©ãŒãã³ã¹ãå®çŸããããšãä¿èšŒã§ããŸããããã«ãããæ©èœè±å¯ãªã¢ããªã±ãŒã·ã§ã³ã«é¢é£ããããšãå€ãé å»¶ãããã«ããã¯ã®åé¡ã軜æžããããŠãŒã¶ãŒ ãšã¯ã¹ããªãšã³ã¹ãšæºè¶³åºŠãåäžããŸãããŠãŒã¶ãŒã®æåŸ ãé«ãŸããè€éããå¢ãæä»£ã«ãããŠãHTTP/2 ã®éèŠæ§ã¯ããã«é¡èã«ãªããææ°ã®ã¢ããªã±ãŒã·ã§ã³éçºã«äžå¯æ¬ ãªããŒã«ãšãªã£ãŠããŸãã
ããã«ãWeb ã€ã³ãã©ã¹ãã©ã¯ãã£ã®é²åãšã¢ãã€ã« ããã€ã¹ã®æ®åã«äŒŽããã¢ããªã±ãŒã·ã§ã³é ä¿¡ã«ããã HTTP/2 ã®åœ¹å²ã¯ä»åŸãå¢å€§ãç¶ããã§ãããããã®èгç¹ããã AppMaster㯠HTTP/2 ã®ãã¯ãŒã掻çšããããšã«å°å¿µããããã¯ãšã³ã ã¢ããªã±ãŒã·ã§ã³ãšããã³ããšã³ã ã¢ããªã±ãŒã·ã§ã³ã®äž¡æ¹ã«é«æ§èœã§å¹ççãªãœãªã¥ãŒã·ã§ã³ãæäŸãããšããåãçµã¿ã«ãããHTTP/2 ãæåãç®æãäŒæ¥ãéçºè ã«ãšã£ãŠäžå¯æ¬ ãªããŒã«ãšããŠäœçœ®ä»ããŠããŸããçŸä»£ã®ãœãããŠã§ã¢éçºã®äžçã