<\/span><\/h3>\n\u201eWebSockets\u201c yra komunikacijos protokolas, \u012fgalinantis realiojo laiko, dvikrypt\u012f kliento ir serverio ry\u0161\u012f su vienu nuolatiniu ry\u0161iu. <\/span><\/p>\nSkirtingai nuo HTTP, kuri yra pagr\u012fsta u\u017eklaus\u0173 ir atsakym\u0173 metu ir baigiasi po kiekvienos s\u0105veikos, \u201eWebSockets\u201c lieka atviros, leid\u017eian\u010dios nuolat keistis duomenimis, nesukuriant ry\u0161io.<\/span> <\/span><\/p>\n<\/span>\u201eWebSockets\u201c prana\u0161umai: <\/strong><\/span><\/span><\/h3>\n\n- Suma\u017eintas latentinis:<\/span><\/b> Greitesnis duomen\u0173 perdavimas, nes ry\u0161ys i\u0161lieka atviras.<\/span> <\/span><\/li>\n<\/ul>\n
\n- Nuolatinis ry\u0161ys:<\/span><\/b> Nereikia pakartotinai i\u0161 naujo prisijungti prie nauj\u0173 duomen\u0173.<\/span> <\/span><\/li>\n<\/ul>\n
\n- Efektyvus bendravimas: <\/span><\/b>Tinka realiojo laiko programoms, kuriose kei\u010diamasi dideliais duomenimis.<\/span> <\/span><\/li>\n<\/ul>\n
<\/span>Naudokite atvejus plazd\u0117dami: <\/strong><\/span><\/span><\/h3>\n\n- Realaus laiko pokalbi\u0173 programos: <\/span><\/b>Momentinis prane\u0161imo pristatymas ir kvitas.<\/span> <\/span><\/li>\n<\/ul>\n
\n- Akcij\u0173 rinkos ar sporto atnaujinimai: <\/span><\/b>Tiesioginiai dinamini\u0173 duomen\u0173 atnaujinimai.<\/span> <\/span><\/li>\n<\/ul>\n
\n- Keli\u0173 \u017eaid\u0117j\u0173 \u017eaidimai:<\/span><\/b> Sinchronizuojant \u017eaidim\u0105 tarp \u017eaid\u0117j\u0173 realiuoju laiku.<\/span>
<\/span><\/li>\n<\/ul>\n<\/span>\u201eWebSocket\u201c nustatymas \u201eFlutter\u201c program\u0173 k\u016brime<\/span><\/b><\/span><\/span><\/h2>\n<\/span>B\u016btinos s\u0105lygos<\/span><\/b><\/span><\/span><\/h3>\nPrie\u0161 pasinerdami \u012f \u201eWebSocket\u201c diegim\u0105, \u012fsitikinkite, kad turite:<\/span> <\/span><\/p>\n\n- Pagrindinis plazd\u0117jimo ir smiginio supratimas.<\/span> <\/span><\/li>\n
- \u017dinios apie \u201eWebSocket\u201c serverio nustatym\u0105 naudojant \u201eBackend\u201c technologij\u0105, pavyzd\u017eiui, Node.js<\/strong>\u201ePython\u201c ar bet kuri \u017einiatinklio rinkinio palaikymo sistema. \u0160is serveris tvarkys gaunamus ry\u0161ius ir apdoros prane\u0161imus.<\/span> <\/span><\/li>\n<\/ol>\n
<\/span>Pridedant priklausomybes<\/span><\/b><\/span><\/span><\/h3>\nMes naudosime \u201eWeb_Socket_Channel\u201c paket\u0105, kad naudotume \u017einiatinklio rinkinius plazdinime, supaprastindami \u201eWebSocket\u201c ry\u0161\u012f. Prid\u0117kite paket\u0105 prie savo <\/span>pubspec.yaml<\/span><\/b> failas:<\/span> <\/span><\/p>\npriklausomyb\u0117s<\/span><\/b>:<\/span>
<\/span>Plok\u0161\u010diojimas<\/span><\/b>:<\/span>
<\/span>SDK<\/span><\/b>: Plok\u0161\u010diojimas<\/span>
<\/span>Web_Socket_Channel<\/span><\/b>: ^2.3.0<\/span> <\/span><\/p>\nPaleiskite \u201e\u201c<\/span>\u201eFlutter Pub\u201c<\/span><\/b>\u201eNor\u0117dami gauti priklausomybes.<\/span> <\/span><\/p>\n\u0160is paketas pateikia lengvai naudojam\u0105 API, skirt\u0105 \u201eWebSocket\u201c ry\u0161i\u0173 ir duomen\u0173 sraut\u0173 tvarkymui \u201eFlutter\u201c programose.<\/span> <\/span><\/p>\n<\/span>Kliento pus\u0117s kodo nustatymas <\/span><\/b><\/span><\/span><\/h3>\nNor\u0117dami \u012fdiegti \u201eWebSockets\u201c \u201eFlutter\u201c, turite u\u017emegzti ry\u0161\u012f, si\u0173sti prane\u0161imus ir klausytis atsakym\u0173. \u0160tai pavyzdys:<\/span> <\/span><\/p>\n\/\/main.dart<\/span>
importuoti <\/span>\u201ePaketas: web_socket_channel\/web_socket_channel.dart\u201c<\/span><\/b>;<\/span><\/p>\ntu\u0161tuma <\/span><\/b>pagrindinis () {<\/span>
<\/span>galutinis <\/span><\/b>kanalas = websocketchannel.connect (<\/span>
Uri.parse (<\/span>\u201eWSS: \/\/example.com\/socket\u201c<\/span><\/b>)<\/span>
);<\/span><\/p>\n kanalas.stream.listen ((prane\u0161imas) {<\/span>
spausdinti (<\/span>Gauta: <\/span><\/b>$ prane\u0161imas<\/span>\u201c<\/span><\/b>);<\/span>
});<\/span><\/p>\n kanalas.sink.add (<\/span>\u201eSveiki,\u201e WebSocket \u201c!\u201c<\/span><\/b>);<\/span>
}<\/span> <\/span><\/p>\n<\/span>Kodo paai\u0161kinimas:<\/span><\/b> <\/span><\/span><\/span><\/h4>\nImportuokite \u201eWebSocketchannel\u201c paket\u0105<\/span><\/b>:<\/span> <\/span><\/p>\n\n- Tai leid\u017eia naudoti \u201eWebSocket\u201c funkcijas savo programoje.<\/span>