鏈枃github鍦板潃锛歨ttps://github.com/HCThink/h-blog/blob/master/source/koa2/readme.mdgithub涓婚〉锛坰tar+watch锛屽崟鎵嬪姩鎬佺洿杈撅級锛歨ttps://github.com/HCThink/h-blog鎺橀噾閾炬帴,鎺橀噾涓撴爮segmentfault鍘熷垱涓婚〉绂佹绉佽嚜杞浇koa2koa涓婚〉浼樼鐨勪笅涓€浠eb寮€鍙戞鏋躲€侹oa搴旂敤绋嬪簭涓嶆槸HTTP鏈嶅姟鍣ㄧ殑涓€瀵逛竴琛ㄧず銆傚彲浠ュ皢涓€涓垨澶氫釜Koa搴旂敤绋嬪簭瀹夎鍦ㄤ竴璧凤紝浠ュ舰鎴愬叿鏈夊崟涓狧TTP鏈嶅姟鍣ㄧ殑鏇村ぇ鐨勫簲鐢ㄧ▼搴忋€傚熀鏈娇鐢ㄥ揩閫熸惌寤轰竴涓畝鍗曠殑koa鏈嶅姟鍣ㄦ湇鍔oa鎼缓涓€涓湇鍔¤繕鏄緢绠€鍗曠殑锛屼富瑕佷唬鐮佸涓嬶紝瀹屾暣浠ｇ爜濡備笅銆傚垏鍒颁富鐩綍瀹夎渚濊禆锛歽arn鎵ц鍏ュ彛锛歽arnstartkoademo鐩綍koademo涓绘枃浠秈mportKoafrom'koa';importhttpsfrom'https';importopenfrom'open';constLog=console.log;constApp=newKoa();App.use(async(ctx,next)=>{ctx.body='HelloWorld';Log('mid1start...');awaitnext();Log('mid1end...');});App.use(async(ctx,next)=>{debugger;Log('mid2start...');awaitnext();Log('mid2end...');});App.use((ctx,next)=>{Log('mid3...');});//鏈嶅姟鐩戞帶锛氫袱绉嶆柟寮忋€侫pp.listen(3000);//璇硶绯?/http.createServer(app.callback()).listen(3000);https.createServer(App.callback()).listen(3001);open('http://localhost:3000');//鎵ц椤哄簭濡備笅锛屽叾瀹瀐ttp浼氭彙鎵嬶紝鎵€浠ヨ緭鍑哄娆?/涓嬮潰鐨勬墽琛岀壒鐐规槸娲嬭懕鍦堬紝鍏跺疄鐔熸倝async鍜宎wait灏变笉浼氬鎬簡銆?/mid1start...//mid2start...//mid3...//mid2end...//mid1end...koa2鐗规€у皝瑁呭寮鸿妭鐐筯ttpserver[request,response]锛岀畝鍗曞張瀹规槗鍏佽銆傛磱钁卞湀鍔犲伐妯″瀷銆傚熀浜巃sync/await鐨勭伒娲诲己澶х殑涓棿浠舵満鍒躲€傞€氳繃濮旀墭锛宎pi鏇存柟渚挎槗鐢ㄣ€俛pi鏄寚瀹樼綉鎻愪緵鐨勫熀鏈琣pi锛屼笉鍐嶈禈杩帮細https://koa.bootcss.com/閮ㄥ垎api瀹炵幇锛屽弬鑰冿細婧愮爜鍒嗘瀽甯哥敤apiapp.listen:鏈嶅姟绔彛listeningapp.callback:return閫傜敤浜巋ttp.createServer()鏂规硶鍥炶皟鍑芥暟澶勭悊璇锋眰銆傛偍杩樺彲浠ヤ娇鐢ㄦ鍥炶皟鍑芥暟灏唊oa搴旂敤绋嬪簭鎸傝浇鍒癈onnect/Express搴旂敤绋嬪簭涓€俛pp.use(function)锛氭寕杞戒腑闂翠欢鐨勪富瑕佹柟娉曘€傛牳蹇冨璞ontextKoaContext灏唍ode鐨剅equest鍜宺esponse瀵硅薄灏佽鎴愪竴涓璞★紝涓虹紪鍐檞eb搴旂敤鍜孉PI鎻愪緵浜嗗緢澶氭湁鐢ㄧ殑鏂规硶銆傝繖浜涙搷浣滃湪HTTP鏈嶅姟鍣ㄥ紑鍙戜腑缁忓父浣跨敤锛屽苟涓斿畠浠槸鍦ㄨ繖涓骇鍒€屼笉鏄洿楂樼骇鍒殑妗嗘灦涓坊鍔犵殑锛岃繖灏嗚揩浣夸腑闂翠欢閲嶆柊瀹炵幇姝ら€氱敤鍔熻兘銆俖_Each__璇锋眰灏嗗垱寤轰竴涓狢ontext骞跺湪涓棿浠朵腑灏嗗叾寮曠敤涓烘帴鏀跺櫒鎴朿tx鏍囪瘑绗︺€俢tx.resrequestctx.req:responsex.request:koa璇锋眰宸ュ叿ctx.response:koa鍝嶅簲宸ュ叿ctx.cookiesctx.request.accepts(types):type鍊煎彲浠ユ槸涓€涓垨澶氫釜mime绫诲瀷鐨勫瓧绗︿覆锛屾瘮濡俛pplication/json,extension鍍廽son杩欐牱鐨勫悕瀛楋紝鎴栬€呮暟缁刐"json","html","text/plain"]銆俽equest.acceptsCharsets(charsets)...鏇村鍙傝€冩磱钁卞湀浣跨敤绾у埆koa娲嬭懕鍦堟墽琛屾満鍒跺浘koa娲嬭懕鍦坘oademo锛宬oademo婧愮爜娲嬭懕鍦堢畝鍗曞疄鐜扮増鏈墽琛屾柟娉曪細tsconionRings.ts--lib'es2015'--sourceMap&&nodeonionRings.js娲嬭懕鍦堢畝鍗曞疄鐜扮増main锛屾磱钁卞湀绠€鍗曞疄鐜扮増婧愮爜绠€鍗曞疄鐜板閮ㄤ腑闂翠欢鍙傝€冿細koa-bodyparsermaincodepublicuse(middleware:Function){this.middList.push(middleware);}//鎵ц鑰呯浜哄紓姝ヤ氦鏄擄紙鎴戯細鏁板瓧=0锛墈璋冭瘯鍣紱濡傛灉锛堟垜>=this.middList.length锛墈杩斿洖鍋囷紱}awaitthis.middList[i](this,this.deal.bind(this,i+1));}瀹炵幇鎬濊矾浣跨敤鏂规硶娉ㄥ唽涓棿浠躲€俤eal妯℃嫙涓€涓猠xecutor锛氬ぇ鑷存€濊矾鏄瓑寰呬笅涓€涓腑闂翠欢浣滀负涓婁竴涓腑闂翠欢鐨勪笅涓€涓潵淇濊瘉姝ｇ‘鐨勬墽琛岄『搴忓拰涓柇銆傞棶棰橈細濡傛灉浣犱範鎯簡鍥炶皟鐨勬€濇兂锛屼細涓嶄細鏈夎繖鏍风殑鐤戞儜锛氭磱钁卞湀鏈哄埗鏄湪涓€涓腑闂翠欢涓皟鐢ㄥ彟澶栦竴涓腑闂翠欢锛岃璋冪敤鐨勪腑闂翠欢鎵ц鎴愬姛锛岃繑鍥炲綋鍓嶄腑闂翠欢缁х画鎵ц锛屽姝よ繛缁皟鐢紝濡傛灉涓棿浠跺緢澶氾紝浼氫笉浼氬舰鎴愬緢娣辩殑鍑芥暟璋冪敤鏍堬紵浠庤€屽奖鍝嶆€ц兘锛屽悓鏃跺舰鎴愨€渪x鍦扮嫳鈥濓紵--ps锛堣繖涓棶棰樻簮浜庡師鍚屼簨灏忛緳鍦ㄥ垎浜椂鐨勬彁闂€傦級鍏跺疄杩欐槸涓€涓緢濂界殑闂锛屽彧鏄鍑芥暟鎵ц鏈哄埗鏈変簡鏇存繁鍏ョ殑浜嗚В鍚庢墠浼氬嚭鐜扮殑闂銆傛帓闄ゅ紓姝ヤ唬鐮佸鐞嗭紝鎴戜滑鍙互寰堝鏄撳湴浠ュ悓姝ユ柟寮忔ā鎷熻繖绉嶈皟鐢ㄥ眰娆＄粨鏋勩€傚弬鑰冿細鍚屾鏂规硶銆傛妯″紡瀛樺湪鏄庢樉鐨勮皟鐢ㄥ爢鏍堥棶棰樸€傛垜鍙互璐熻矗浠荤殑鍥炵瓟锛氭病鏈夛紝涓嬩竴涓棶棰樸€傪煒備笉琛岀殑鍘熷洜鍦╣enerator閲岄潰浠嬬粛鐨勫緢璇︾粏锛屼竴涓ゅ彞璇濅篃璇翠笉娓呮銆傚叾瀹炴垜瑙夊緱杩欓噷鏈変釜璇硶闂ㄦ銆傚湪generator涔嬪墠锛屼笉绠＄敤浠€涔堟柟寮忓鐞嗚繖涓棶棰橀兘鏄惧緱鎬€殑锛屽緢闅捐В鍐宠В鍐虫柟妗堝眰闈㈠甫鏉ョ殑鎬ц兘鍜岃皟璇曢棶棰樸€傝缁嗗弬鑰冿細GeneratorTrue銆傚崗绋嬫簮鐮並OA婧愮爜鐗瑰埆绮剧畝锛屾病鏈塃xpress鍖呴偅涔堝鍔熻兘锛実it婧愮爜锛歔https://github.com/koajs/koa]椤圭洰koa2鐨勬簮鐮侀」鐩粨鏋勯潪甯哥畝鍗曟槑浜嗕竴鐪兼湜鍘伙紝娌℃湁鑺遍噷鑳″摠鐨勪笢瑗裤€備富鏂囦欢鈹溾攢鈹€History.md鈹溾攢鈹€....鈹溾攢鈹€Readme.md鈹溾攢鈹€benchmarks鈹溾攢鈹€docs//doc鈹傗敎鈹€鈹€api......鈹溾攢鈹€lib//sourcecode鈹傗敎鈹€鈹€application.js//鍏ュ彛鏂囦欢锛屽皝瑁呬簡context锛宺equest锛宺esponse锛屾牳蹇冧腑闂翠欢澶勭悊娴佺▼銆傗攤鈹溾攢鈹€context.js//context.js澶勭悊搴旂敤涓婁笅鏂囷紝鐩存帴灏佽浜唕equest.js鍜宺esponse.js鐨勪竴浜涙柟娉曗攤鈹溾攢鈹€request.js//request.js澶勭悊http璇锋眰鈹傗敂鈹€鈹€response.js//response.js澶勭悊http鍝嶅簲鈹溾攢鈹€package.json鈹斺攢鈹€test//娴嬭瘯妯″潡鈹溾攢鈹€application....package.jsonjest鍋氭祴璇曡妭鐐圭増鏈瑊"engines":{"node":"^4.8.4||^6.10.1||^7.10.1||>=8.1.4"}}Mainentry:"main":"lib/application.js"koa灏佽鐨刪ttpserver锛坣ode锛夋牳蹇冩牳蹇冩ā鍧楀璞′笂涓嬫枃銆佽姹傘€佸搷搴斾腑闂翠欢鏈哄埗鍜屾磱钁辩毊妯″瀷閿欒鎹曡幏鍜岄敊璇鐞嗘簮鐮佺殑瀹炵幇.搴旂敤杩樻毚闇蹭簡涓€浜涘父鐢ㄧ殑API锛屾瘮濡倀oJSON銆乴isten銆乽se绛夈€俢ontext.jsrequest.jsresponse.js鐗规畩澶勭悊濮旀墭鎵樻憳context.js锛歝ontext.jsconstproto=module.exports={//...};delegate(proto,'response').method('attachment').method('redirect').method('remove').method('vary').method('set').method('append').method('flushHeaders').access('status').access('message').access('body').access('length').access('type').access('lastModified').access('etag').getter('headerSent').getter('writable');delegate(proto,'request').method('acceptsLanguages').method('acceptsEncodings').method('acceptsCharsets').method('accepts').method('get').method('is').access('querystring').access('idempotent').access('socket').access('search').access('method').access('query').access('path').access('url').access('accept').getter('origin').getter('href').getter('subdomains').getter('protocol').getter('host').getter('涓绘満鍚?).getter('URL').getter('鏍囬').getter('鏍囬').getter('secure').getter('stale').getter('fresh').getter('ips').getter('ip');koa涓轰簡鏂逛究绾ц仈涓棿浠讹紝鎻愪緵浜嗕竴涓猚ontext瀵硅薄锛屽苟灏嗘牳蹇冪殑response鍜宺equest瀵硅薄鎸傝浇鍦ㄤ笂闈紝浣嗘槸杩欐牱寰€寰€浼氶€犳垚鍐椾綑鐨勫啓娉曪紝eg锛歝tx.response.body锛岃€屼笖缁忓父浼氱敤鍒颁竴浜涘璞★紝闈炲父涓嶆柟渚?鎵€浠ュ垱寤篸elegates搴擄紝鐢ㄤ簬濮旀墭鎿嶄綔锛屽鎵樺悗鍙互鐩存帴鍦╟tx涓婁娇鐢ㄩ儴鍒嗗鎵樺睘鎬э細ctx.body婧愮爜鍒嗘瀽濡備笅delegates婧愮爜鍒嗘瀽delegates搴撴簮鏂囦欢涓棿浠舵満鍒秌oa-composekoa鐢ㄤ簬娉ㄥ唽涓棿浠讹紝鍏跺疄灏辨槸鎶婂涓腑闂翠欢鏀惧埌涓€涓紦瀛橀槦鍒椾腑this.middleware.push(fn);鐒跺悗閫氳繃koa-compose鎻掍欢閫掑綊缁勫悎瀹冧滑銆傚洜姝わ紝涓ユ牸鏉ヨ锛屼腑闂翠欢鎵ц缁撴瀯鐨勭粍缁囧苟涓嶆槸鍦╧oa婧愮爜涓畬鎴愮殑锛岃€屾槸鍦ㄤ緷璧栧簱koa-compose涓畬鎴愮殑銆傚湪koa涓娇鐢細constfn=compose(this.middleware);瀹屾垚涓棿浠剁殑缁勬垚銆俴oa-compose鐨勬牳蹇冮€昏緫濡備笅锛屼富瑕佹€濇兂澶ц嚧鏄細閫氳繃鍖呰涓棿浠禠ist锛岃繑鍥炰竴涓粍瑁呭ソ鐨別xecutor銆傜粍瑁呮€濊矾鏄細灏嗕笅涓€涓腑闂翠欢[actuator+promise]鎵撳寘涓轰笂涓€涓腑闂翠欢鐨勪笅涓€涓猍dispatch.bind(null,i+1)]銆傚悓鏃讹紝灏嗕笂涓嬫枃瀵硅薄鎻愪緵缁欎腑闂翠欢銆俽eturnfunction(context,next){//鏈€鍚庤皟鐢ㄧ殑涓棿浠?letindex=-1returndispatch(0)functiondispatch(i){if(i<=index)returnPromise.reject(newError('next()called澶氭'))index=iletfn=middleware[i]if(i===middleware.length)fn=next//鍦ㄥ嚱鏁皁nion鐨勬湯灏炬坊鍔犱竴涓狿romise.resolve();if(!fn)returnPromise.resolve()try{//涓棿浠舵槸涓€涓繑鍥炴壙璇虹殑寮傛鍑芥暟銆侾romise.resolve纭繚涓棿浠舵墽琛屽畬鎴?/鎻愪緵ctx锛屼笅涓€涓猣n锛歞ispatch.bind(null,i+1)returnPromise.resolve(fn(context,dispatch.bind(null,i+1)));}catch(err){returnPromise.reject(err)}}}koa-composekoa-compose鏄竴涓潪甯哥簿绠€鐨勫簱锛屼笉鍗曠嫭鍒嗘瀽浜嗐€傚畠鎻愪緵浜嗕竴涓富璋冪殑閫掑綊锛歠n(context,dispatch.bind(null,i+1))锛岃繖涓柟娉曞彲浠ヨ涓烘槸鈥樻儼鎬ч€掑綊鈥欙紝閫掑綊鐨勬墽琛屼氦缁欒皟鐢ㄨ€呮潵鎺у埗锛屾墍浠ュ悗闈㈢殑澶勭悊鍙互鍦ㄦ洿鍚堥€傜殑鏃跺€欒繘琛岋紝浣嗘槸濡傛灉涓€涓腑闂翠欢娌℃湁璋冪敤next锛岄偅涔堝悗闈㈢殑涓棿浠跺氨涓嶄細鎵ц銆傝繖涓被浼间簬js鍗忕▼[generator]鐨勬満鍒躲€傛帶鍒秐ext鎵ц鏃舵満鐨勬槸鐢ㄦ埛锛岀被鎺ㄥ嵆鍙€侴eneratorEaseofUseHandlingkoa闈炲父濂界敤锛屽洜涓簁oa鍦ㄦ簮鐮佸眰闈㈠澶嶆潅鐨勫璞″仛浜嗗緢澶氱殑濮旀墭鍜屽皝瑁咃紝姣斿璇锋眰鍜屽搷搴旂殑get/set銆傚畠鐢ㄤ簬鎻愰珮宸ュ叿鐨勫彲鐢ㄦ€у拰鏄撶敤鎬с€傚叾瀹炴垜瑙夊緱杩欏湪鐜颁唬妗嗘灦涓槸寰堥噸瑕佺殑浜嬫儏锛屽拰鐢ㄦ埛鍒嗙鐨勫簱涓嶆槸濂藉簱銆俴oa鏄竴涓緢濂界殑搴撱€備笂闈㈣鐨刣elegates锛屽弬鑰冿細delegates.get/setrequest,response涓や釜鏂囦欢锛屽嚑鍗冭浠ｇ爜锛屽ぇ姒?0%鏄痝et鍜宻et锛屽弬鑰冿細request.jsresponse.js鍙︿竴鏂归潰鏄湪application.js鐨刢reateContext鏂规硶涓〃杈剧殑锛岄€氳繃閰嶅悎mountreference鍜宒elegationgetset鐨勫仛娉曢厤鍚堬紝鎻愰珮浜嗘槗鐢ㄦ€с€傚崟鐙涓嶅ソ锛屽垎鏋愭敞閲婂湪婧愮爜閲屻€傚紓甯告崟鑾蜂腑闂翠欢寮傚父鎹曡幏锛宬oa1涓棿浠跺熀浜巊enerator+co锛宬oa2涓棿浠跺熀浜巃sync/await锛宎sync鍑芥暟杩斿洖promise锛屾墍浠ュ彧瑕佹妸涓棿浠跺拰catch缁撳悎璧锋潵锛屽氨鍙互鎹曡幏涓棿浠跺紓甯竑nMiddleware(ctx).then(handleResponse).catch(onerror);妗嗘灦灞傜殑閿欒鎹曡幏鏈哄埗锛岀户鎵夸簨浠舵ā鍧楋紝寰堝鏄撳疄鐜扮洃鎺с€倀his.on('閿欒',this.onerror);娉ㄥ唽鐨勯敊璇簨浠跺湪context.onerrorthis.app.emit('error',err,this);涓彂鍑恒€俬ttp寮傚父澶勭悊锛氬綋涓€涓狧TTP璇锋眰鍏抽棴銆佸畬鎴愭垨鍑洪敊鏃舵墽琛屽洖璋冦€俹nFinished(res,onerror);//application.handleRequest涓棿浠朵氦浜掓棭鏈熺殑涓棿浠剁敤鎴峰彲鑳戒細鏈変竴涓枒闂細涓棿浠舵槸濡備綍閫氫俊鐨勶紵鍏跺疄杩欐槸涓€绉嶈璁℃潈琛￠€昏緫銆備腑闂翠欢涔嬮棿鐨勬暟鎹氦浜掑苟涓嶉夯鐑︼紝灏ゅ叾鏄疎CMAScript寮曞叆浜哸syncawait涔嬪悗锛屼絾闂鏄繖涓剰涔変笉澶э紝鍥犱负鎵€鏈夌殑涓棿浠堕兘鏄彲浠ラ殢鎰忔彃鍏ョ粍鍚堢殑锛岃繖绉嶄笉纭畾鎬у鑷翠簡涓棿浠朵箣闂寸殑鏁版嵁浜や簰鍙樺緱涓嶇ǔ瀹?鏈€灏忔暟鎹牸寮忔棤娉曞浐瀹氾紝鏇翠笉鐢ㄨ澶勭悊浜嗐€傜伒娲荤殑鎻掍欢鏈哄埗浣垮緱涓棿浠朵箣闂撮毦浠ュ疄鐜扮粺涓€灞傛鐨勪氦浜掋€傚彟涓€鏂归潰锛屼粠涓棿浠剁殑瀹氫綅鏉ョ湅锛屽畠浠箣闂存病鏈変氦浜掔殑蹇呰銆備腑闂翠欢涓嶈兘鐙珛浜巋ttp璇锋眰鍝嶅簲鑰屽瓨鍦ㄣ€傚畠鏈嶅姟浜庢暣涓祦绋嬶紝鎵€浠ユ墍鏈変腑闂翠欢鐨勭涓€涓弬鏁伴兘鏄痗tx锛岃繖涓璞℃寕杞戒簡request鍜宺esponse锛屼互鍙妅oa鎻愪緵鐨勫皝瑁呭拰宸ュ叿鎿嶄綔銆傛牳蹇冪偣涓柇杩欐槸娲嬭懕鍦堟渶鏍稿績鐨勬敮鎾戠偣銆傛垜浠◢鍔犳敞鎰忓氨浼氬彂鐜帮紝koa涓棿浠剁殑鎵ц鏈哄埗涓庢櫘閫歫s鐨勬墽琛岄『搴忓緢涓嶄竴鑷淬€傝鎴戜滑鐪嬬湅涓嬮潰鐨勪唬鐮侊細app.use(async(cxt,next)=>{Log(1);awaitnext();Log(2);});app.use(async(cxt,next)=>{鏃ュ織锛?锛夛紱绛夊緟涓嬩竴涓紙锛夛紱鏃ュ織锛?锛夛紱}锛夛紱涓婇潰浠ｇ爜鐨勬墽琛岄『搴忔槸娲嬭懕鍦堬細Log(1)->awaitnext(Log(3))->awaitnext->Log(4)->Log(2)銆備负浜嗕繚璇佷唬鐮佹寜鐓ф磱钁辨ā鍨嬬殑鎵ц椤哄簭鎵ц锛岀▼搴忓湪璋冪敤next鐨勬椂鍊欓渶瑕佽浠ｇ爜绛夊緟锛屾垜绉颁箣涓轰腑鏂€傚叾瀹炰箣鍓嶆兂瑕佸疄鐜拌繖绉嶆墽琛岄『搴忥紝鍙兘闈燾b,promise.then鏉ユā鎷燂紝鑰屼笖灏辩畻瀹炵幇浜嗭紝鍐欒捣鏉ュ張鑷冭偪鍙堝埆鎵紝瑕佷箞鍐欎釜寰堣偉鐨勫嚱鏁帮紝鎴栬€呭啓涓€涓潪甯歌儢鐨勫嚱鏁般€傞暱鍑芥暟銆傝€屼笖鏃犳硶澶勭悊璋冪敤鏍堢殑闂銆俛sync/await鍙互鏇翠紭闆呯殑瀹炵幇杩欑鍏锋湁鍚屾鎵ц鐗规€х殑鍓嶇浠ｇ爜鏉ュ鐞嗗紓姝ャ€備唬鐮佸湪杩欓噷鎵ц鍒癮wait锛岀瓑寰卆wait琛ㄨ揪寮忕殑鎵ц锛屾墽琛屽畬鎴愬悗鍐嶆墽琛屻€傚叾瀹炶繖鍜岀敓鎴愬櫒鐨剏ield鐗规€ч潪甯哥浉浼笺€俛sync涔熸槸generator+executor鐨勮娉曠硸锛屽弬鑰冿細async/awaitcogeneratorasync?涓嶆槸鐨勶紝瀹冪殑generatorkoa.use蹇呴』鐩存帴浣跨敤async鍑芥暟鏉ュ鐞嗕腑闂翠欢鍜岄噷闈㈠彲鑳藉瓨鍦ㄧ殑寮傛锛岃€宎sync/await鏄熀浜巊enerator瀹炵幇鐨勩€俛sync鐨勪娇鐢ㄥ彲浠ヨ皥鐨勭偣閫氬父鏄粬鐨則ask鏀惧湪鍝噷锛岃繕鏈夋墽琛岀殑鏃舵満鍜岃秴鏃舵椂闂达紝promise鐨勬墽琛岄『搴忕瓑绛夈€傜湡姝ｇ殑涓柇鐗规€ц褰掑姛浜庣敓鎴愬櫒銆備竴浣嶄笉鎰块€忛湶濮撳悕鐨勫悓浜嬮棶鎴戜竴涓棶棰橈紝濡備綍璇佹槑async鏄痝enerator+executor鐨勮娉曠硸锛熻繖鏄竴涓笉寰椾笉璁ㄨ鐨勯棶棰樸€傜浉鍏宠璁哄弬鑰冿細Async/Await>#generator閮ㄥ垎璁ㄨ鐢熸€乲oa涓棿浠讹紝娌℃湁缁熶竴甯傚満銆傝瀹炶瘽锛屾壘璧锋潵涓嶆槸閭ｄ箞鏂逛究銆傚鏋滄兂鎵句腑闂翠欢锛屽彲浠ュ湪npm涓婄敤koa-杩涜鍏抽敭璇嶆悳绱細https://www.npmjs.com/search?...瀹樻柟涓棿浠舵簮鐮佷娇鐢ㄧ殑涓棿浠秌oa-compose鍦╧oa涓婂凡缁忓垎鏋愯繃浜?is-jsonfunctionisJSON(body){if(!body)杩斿洖false;if('string'==typeofbody)杩斿洖false锛沬f('function'==typeofbody.pipe)杩斿洖false锛涘鏋?Buffer.isBuffer(body))杩斿洖false锛況eturntrue;}koa-convert鐢ㄤ簬generator涓棿浠剁殑鍏煎澶勭悊锛屽熀鏈彲浠ョ湅鎴愭槸co+generator涓棿浠躲€愬悓鏍蜂緷璧杒oa-compose杩涜缁勭粐銆戝叾浠杒oa绀惧尯甯哥敤涓棿浠跺悎闆嗭細閮ㄥ垎涓棿浠跺弬鑰?鑷磋阿https://koa.bootcss.com/http://nodejs.cn/api/fs.html#...https://juejin.im/post/5ba786...
