unleash-proxy-client - npm Package Compare versions

Comparing version 3.7.2 to 3.7.3

build/cjs/util.d.ts

@@ -6,2 +6,11 @@ import { IContext } from '.';
 export declare const computeContextHashValue: (obj: IContext) => Promise<string>;
+export declare const parseHeaders: ({ clientKey, appName, connectionId, customHeaders, headerName, etag, isPost, }: {
+    clientKey: string;
+    connectionId: string;
+    appName: string;
+    customHeaders?: Record<string, string>;
+    headerName?: string;
+    etag?: string;
+    isPost?: boolean;
+}) => Record<string, string>;
 //# sourceMappingURL=util.d.ts.map

build/cjs/version.d.ts

@@ -1,2 +0,2 @@
-export declare const sdkVersion = "unleash-js@__VERSION__";
+export declare const sdkVersion = "unleash-client-js:__VERSION__";
 //# sourceMappingURL=version.d.ts.map

build/main.esm.js

@@ -1,2 +0,2 @@
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0,[4,this.fetch(r.toString(),{method:o,cache:"no-cache",headers:this.getHeaders(),body:i,signal:t})];case 2:return s=n.sent(),"error"===this.sdkState&&s.status<400&&(this.sdkState="healthy",this.emit(S.RECOVERED)),s.ok?(this.etag=s.headers.get("ETag")||"",[4,s.json()]):[3,5];case 3:return c=n.sent(),[4,this.storeToggles(c.toggles)];case 4:return n.sent(),"healthy"!==this.sdkState&&(this.sdkState="healthy"),this.fetchedFromServer||(this.fetchedFromServer=!0,this.setReady()),this.storeLastRefreshTimestamp(),[3,6];case 5:304===s.status?this.storeLastRefreshTimestamp():(console.error("Unleash: Fetching feature toggles did not have an ok response"),this.sdkState="error",this.emit(S.ERROR,{type:"HttpError",code:s.status}),this.lastError={type:"HttpError",code:s.status}),n.label=6;case 6:return[3,9];case 7:return"object"==typeof(u=n.sent())&&null!==u&&"name"in u&&"AbortError"===u.name||(console.error("Unleash: unable to fetch feature toggles",u),this.sdkState="error",this.emit(S.ERROR,u),this.lastError=u),[3,9];case 8:return this.abortController=null,[7];case 9:return[2]}}))}))},i}(s);export{S as EVENTS,f as InMemoryStorageProvider,d as LocalStorageProvider,U as UnleashClient,N as lastUpdateKey,A as resolveFetch};
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t=this;this.timer=setInterval((function(){t.sendMetrics()}),this.metricsInterval)},t.prototype.bucketIsEmpty=function(t){return 0===Object.keys(t.bucket.toggles).length},t.prototype.getPayload=function(){var t=e(e({},this.bucket),{stop:new Date});return this.bucket=this.createEmptyBucket(),{bucket:t,appName:this.appName,instanceId:"browser"}},t}(),d=function(){function t(){this.store=new Map}return t.prototype.save=function(t,e){return r(this,void 0,void 0,(function(){return n(this,(function(r){return this.store.set(t,e),[2]}))}))},t.prototype.get=function(t){return r(this,void 0,void 0,(function(){return n(this,(function(e){return[2,this.store.get(t)]}))}))},t}(),f=function(){function t(t){void 0===t&&(t="unleash:repository"),this.prefix=t}return t.prototype.save=function(t,e){return r(this,void 0,void 0,(function(){var r,o;return 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s?e(e({},a),{variant:s}):a},t.prototype.createBaseEvent=function(t,e,r,n,o){return{eventType:n,eventId:this.generateEventId(),context:t,enabled:e,featureName:r,impressionData:o}},t}(),w=["userId","sessionId","remoteAddress","currentTime"],E=function(t){return w.includes(t)},I={INIT:"initialized",ERROR:"error",READY:"ready",UPDATE:"update",IMPRESSION:"impression",SENT:"sent",RECOVERED:"recovered"},S="isEnabled",R="getVariant",O={name:"disabled",enabled:!1,feature_enabled:!1},k="repo",N="repoLastUpdateTimestamp",A=function(){try{if("undefined"!=typeof window&&"fetch"in window)return fetch.bind(window);if("fetch"in globalThis)return fetch.bind(globalThis)}catch(t){console.error('Unleash failed to resolve "fetch"',t)}},U=function(o){function i(t){var r=t.storageProvider,n=t.url,i=t.clientKey,s=t.disableRefresh,a=void 0!==s&&s,c=t.refreshInterval,u=void 0===c?30:c,l=t.metricsInterval,h=void 0===l?30:l,v=t.metricsIntervalInitial,m=void 0===v?2:v,g=t.disableMetrics,y=void 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T,V.impressionDataAll=M,V.toggles=N&&N.length>0?N:[],V.url=n instanceof URL?n:new URL(n),V.clientKey=i,V.headerName=L,V.customHeaders=j,V.storage=r||("undefined"!=typeof window?new f:new d),V.refreshInterval=a?0:1e3*u,V.context=e({appName:b,environment:w},E),V.usePOSTrequests=_,V.sdkState="initializing",V.experimental=e({},F),(null==F?void 0:F.togglesStorageTTL)&&(null==F?void 0:F.togglesStorageTTL)>0&&(V.experimental.togglesStorageTTL=1e3*F.togglesStorageTTL),V.lastRefreshTimestamp=0,V.ready=new Promise((function(t){V.init().then(t).catch((function(e){console.error(e),V.sdkState="error",V.emit(I.ERROR,e),V.lastError=e,t()}))})),R||console.error('Unleash: You must either provide your own "fetch" implementation or run in an environment where "fetch" is available.'),k||console.error('Unleash: You must either provide your own "AbortController" implementation or run in an environment where "AbortController" is 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t.concat(n||Array.prototype.slice.call(e))}([],this.toggles,!0)},i.prototype.isEnabled=function(t){var e,r=this.toggles.find((function(e){return e.name===t})),n=!!r&&r.enabled;if(this.metrics.count(t,n),(null==r?void 0:r.impressionData)||this.impressionDataAll){var o=this.eventsHandler.createImpressionEvent(this.context,n,t,S,null!==(e=null==r?void 0:r.impressionData)&&void 0!==e?e:void 0);this.emit(I.IMPRESSION,o)}return n},i.prototype.getVariant=function(t){var r,n=this.toggles.find((function(e){return e.name===t})),o=(null==n?void 0:n.enabled)||!1,i=n?n.variant:O;if(i.name&&this.metrics.countVariant(t,i.name),this.metrics.count(t,o),(null==n?void 0:n.impressionData)||this.impressionDataAll){var s=this.eventsHandler.createImpressionEvent(this.context,o,t,R,null!==(r=null==n?void 0:n.impressionData)&&void 0!==r?r:void 0,i.name);this.emit(I.IMPRESSION,s)}return e(e({},i),{feature_enabled:o})},i.prototype.updateToggles=function(){return r(this,void 0,void 0,(function(){var t=this;return 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t=n.sent(),this.context=e({sessionId:t},this.context),r=this,[4,this.storage.get(k)];case 2:return r.toggles=n.sent()||[],o=this,[4,this.getLastRefreshTimestamp()];case 3:return o.lastRefreshTimestamp=n.sent(),!this.bootstrap||!this.bootstrapOverride&&0!==this.toggles.length?[3,6]:[4,this.storage.save(k,this.bootstrap)];case 4:return n.sent(),this.toggles=this.bootstrap,this.sdkState="healthy",[4,this.storeLastRefreshTimestamp()];case 5:n.sent(),this.setReady(),n.label=6;case 6:return this.sdkState="healthy",this.emit(I.INIT),[2]}}))}))},i.prototype.start=function(){return r(this,void 0,void 0,(function(){var t,e=this;return n(this,(function(r){switch(r.label){case 0:return this.started=!0,this.timerRef?(console.error("Unleash SDK has already started, if you want to restart the SDK you should call client.stop() before starting again."),[2]):[4,this.ready];case 1:return r.sent(),this.metrics.start(),t=this.refreshInterval,[4,this.initialFetchToggles()];case 2:return r.sent(),t>0&&(this.timerRef=setInterval((function(){return e.fetchToggles()}),t)),[2]}}))}))},i.prototype.stop=function(){this.timerRef&&(clearInterval(this.timerRef),this.timerRef=void 0),this.metrics.stop()},i.prototype.isReady=function(){return this.readyEventEmitted},i.prototype.getError=function(){return"error"===this.sdkState?this.lastError:void 0},i.prototype.sendMetrics=function(){return this.metrics.sendMetrics()},i.prototype.resolveSessionId=function(){return r(this,void 0,void 0,(function(){var t;return n(this,(function(e){switch(e.label){case 0:return this.context.sessionId?[2,this.context.sessionId]:[4,this.storage.get("sessionId")];case 1:return(t=e.sent())?[3,3]:(t=Math.floor(1e9*Math.random()),[4,this.storage.save("sessionId",t.toString(10))]);case 2:e.sent(),e.label=3;case 3:return[2,t.toString(10)]}}))}))},i.prototype.getHeaders=function(){return l({clientKey:this.clientKey,connectionId:this.connectionId,appName:this.context.appName,customHeaders:this.customHeaders,headerName:this.headerName,etag:this.etag,isPost:this.usePOSTrequests})},i.prototype.storeToggles=function(t){return r(this,void 0,void 0,(function(){return n(this,(function(e){switch(e.label){case 0:return this.toggles=t,this.emit(I.UPDATE),[4,this.storage.save(k,t)];case 1:return e.sent(),[2]}}))}))},i.prototype.isTogglesStorageTTLEnabled=function(){var t;return!!((null===(t=this.experimental)||void 0===t?void 0:t.togglesStorageTTL)&&this.experimental.togglesStorageTTL>0)},i.prototype.isUpToDate=function(){var t;if(!this.isTogglesStorageTTLEnabled())return!1;var e=Date.now(),r=(null===(t=this.experimental)||void 0===t?void 0:t.togglesStorageTTL)||0;return this.lastRefreshTimestamp>0&&this.lastRefreshTimestamp<=e&&e-this.lastRefreshTimestamp<=r},i.prototype.getLastRefreshTimestamp=function(){return r(this,void 0,void 0,(function(){var t,e;return n(this,(function(r){switch(r.label){case 0:return this.isTogglesStorageTTLEnabled()?[4,this.storage.get(N)]:[3,3];case 1:return t=r.sent(),[4,u(this.context)];case 2:return e=r.sent(),[2,(null==t?void 0:t.key)===e?t.timestamp:0];case 3:return[2,0]}}))}))},i.prototype.storeLastRefreshTimestamp=function(){return r(this,void 0,void 0,(function(){var t,e;return n(this,(function(r){switch(r.label){case 0:return this.isTogglesStorageTTLEnabled()?(this.lastRefreshTimestamp=Date.now(),e={},[4,u(this.context)]):[3,3];case 1:return e.key=r.sent(),e.timestamp=this.lastRefreshTimestamp,t=e,[4,this.storage.save(N,t)];case 2:r.sent(),r.label=3;case 3:return[2]}}))}))},i.prototype.initialFetchToggles=function(){if(!this.isUpToDate())return this.fetchToggles();this.fetchedFromServer||(this.fetchedFromServer=!0,this.setReady())},i.prototype.fetchToggles=function(){return r(this,void 0,void 0,(function(){var t,e,r,o,i,s,c,u,l;return n(this,(function(n){switch(n.label){case 0:if(!this.fetch)return[3,9];this.abortController&&this.abortController.abort(),this.abortController=null===(l=this.createAbortController)||void 0===l?void 0:l.call(this),t=this.abortController?this.abortController.signal:void 0,n.label=1;case 1:return n.trys.push([1,7,8,9]),e=this.usePOSTrequests,r=e?this.url:function(t,e){var r=new URL(t.toString());return Object.entries(e).filter(a).forEach((function(t){var e=t[0],n=t[1];"properties"===e&&n?Object.entries(n).filter(a).forEach((function(t){var e=t[0],n=t[1];return r.searchParams.append("properties[".concat(e,"]"),n)})):r.searchParams.append(e,n)})),r}(this.url,this.context),o=e?"POST":"GET",i=e?JSON.stringify({context:this.context}):void 0,[4,this.fetch(r.toString(),{method:o,cache:"no-cache",headers:this.getHeaders(),body:i,signal:t})];case 2:return s=n.sent(),"error"===this.sdkState&&s.status<400&&(this.sdkState="healthy",this.emit(I.RECOVERED)),s.ok?(this.etag=s.headers.get("ETag")||"",[4,s.json()]):[3,5];case 3:return c=n.sent(),[4,this.storeToggles(c.toggles)];case 4:return n.sent(),"healthy"!==this.sdkState&&(this.sdkState="healthy"),this.fetchedFromServer||(this.fetchedFromServer=!0,this.setReady()),this.storeLastRefreshTimestamp(),[3,6];case 5:304===s.status?this.storeLastRefreshTimestamp():(console.error("Unleash: Fetching feature toggles did not have an ok response"),this.sdkState="error",this.emit(I.ERROR,{type:"HttpError",code:s.status}),this.lastError={type:"HttpError",code:s.status}),n.label=6;case 6:return[3,9];case 7:return"object"==typeof(u=n.sent())&&null!==u&&"name"in u&&"AbortError"===u.name||(console.error("Unleash: unable to fetch feature toggles",u),this.sdkState="error",this.emit(I.ERROR,u),this.lastError=u),[3,9];case 8:return this.abortController=null,[7];case 9:return[2]}}))}))},i}(s);export{I as EVENTS,d as InMemoryStorageProvider,f as LocalStorageProvider,U as UnleashClient,N as lastUpdateKey,A as resolveFetch};
 //# sourceMappingURL=main.esm.js.map

build/main.min.js

@@ -1,2 +0,2 @@
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4:return[2]}}))}))},t.prototype.count=function(t,e){return!(this.disabled||!this.bucket)&&(this.assertBucket(t),this.bucket.toggles[t][e?"yes":"no"]++,!0)},t.prototype.countVariant=function(t,e){return!(this.disabled||!this.bucket)&&(this.assertBucket(t),this.bucket.toggles[t].variants[e]?this.bucket.toggles[t].variants[e]+=1:this.bucket.toggles[t].variants[e]=1,!0)},t.prototype.assertBucket=function(t){if(this.disabled||!this.bucket)return!1;this.bucket.toggles[t]||(this.bucket.toggles[t]={yes:0,no:0,variants:{}})},t.prototype.startTimer=function(){var t=this;this.timer=setInterval((function(){t.sendMetrics()}),this.metricsInterval)},t.prototype.bucketIsEmpty=function(t){return 0===Object.keys(t.bucket.toggles).length},t.prototype.getPayload=function(){var t=r(r({},this.bucket),{stop:new Date});return this.bucket=this.createEmptyBucket(),{bucket:t,appName:this.appName,instanceId:"browser"}},t}(),d=function(){function t(){this.store=new Map}return t.prototype.save=function(t,e){return n(this,void 0,void 0,(function(){return o(this,(function(r){return this.store.set(t,e),[2]}))}))},t.prototype.get=function(t){return n(this,void 0,void 0,(function(){return o(this,(function(e){return[2,this.store.get(t)]}))}))},t}(),v=function(){function t(t){void 0===t&&(t="unleash:repository"),this.prefix=t}return t.prototype.save=function(t,e){return n(this,void 0,void 0,(function(){var r,n;return o(this,(function(o){r=JSON.stringify(e),n="".concat(this.prefix,":").concat(t);try{window.localStorage.setItem(n,r)}catch(t){console.error(t)}return[2]}))}))},t.prototype.get=function(t){try{var e="".concat(this.prefix,":").concat(t),r=window.localStorage.getItem(e);return r?JSON.parse(r):void 0}catch(t){console.error(t)}},t}();let m;const g=new Uint8Array(16);function y(){if(!m&&(m="undefined"!=typeof crypto&&crypto.getRandomValues&&crypto.getRandomValues.bind(crypto),!m))throw new Error("crypto.getRandomValues() not supported. 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s?r(r({},a),{variant:s}):a},t.prototype.createBaseEvent=function(t,e,r,n,o){return{eventType:n,eventId:this.generateEventId(),context:t,enabled:e,featureName:r,impressionData:o}},t}(),E=["userId","sessionId","remoteAddress","currentTime"],S=function(t){return E.includes(t)},I={INIT:"initialized",ERROR:"error",READY:"ready",UPDATE:"update",IMPRESSION:"impression",SENT:"sent",RECOVERED:"recovered"},R="isEnabled",O="getVariant",k={name:"disabled",enabled:!1,feature_enabled:!1},N="repo",A="repoLastUpdateTimestamp",U=function(){try{if("undefined"!=typeof window&&"fetch"in window)return fetch.bind(window);if("fetch"in globalThis)return fetch.bind(globalThis)}catch(t){console.error('Unleash failed to resolve "fetch"',t)}},D=function(t){function i(e){var n=e.storageProvider,o=e.url,i=e.clientKey,s=e.disableRefresh,a=void 0!==s&&s,c=e.refreshInterval,u=void 0===c?30:c,l=e.metricsInterval,h=void 0===l?30:l,p=e.metricsIntervalInitial,m=void 0===p?2:p,g=e.disableMetrics,y=void 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0!==g&&g,b=e.appName,T=e.environment,x=void 0===T?"default":T,E=e.context,S=e.fetch,R=void 0===S?A():S,O=e.createAbortController,k=void 0===O?function(){try{if("undefined"!=typeof window&&"AbortController"in window)return function(){return new window.AbortController};if("fetch"in globalThis)return function(){return new globalThis.AbortController}}catch(t){console.error('Unleash failed to resolve "AbortController" factory',t)}}():O,N=e.bootstrap,U=e.bootstrapOverride,P=void 0===U||U,D=e.headerName,L=void 0===D?"Authorization":D,C=e.customHeaders,j=void 0===C?{}:C,H=e.impressionDataAll,M=void 0!==H&&H,K=e.usePOSTrequests,F=void 0!==K&&K,_=e.experimental,V=t.call(this)||this;if(V.toggles=[],V.etag="",V.readyEventEmitted=!1,V.fetchedFromServer=!1,V.usePOSTrequests=!1,V.started=!1,!o)throw new Error("url is required");if(!i)throw new Error("clientKey is required");if(!b)throw new Error("appName is required.");return V.eventsHandler=new w,V.impressionDataAll=M,V.toggles=N&&N.length>0?N:[],V.url=o instanceof URL?o:new URL(o),V.clientKey=i,V.headerName=L,V.customHeaders=j,V.storage=n||("undefined"!=typeof window?new v:new f),V.refreshInterval=a?0:1e3*u,V.context=r({appName:b,environment:x},E),V.usePOSTrequests=F,V.sdkState="initializing",V.experimental=r({},_),(null==_?void 0:_.togglesStorageTTL)&&(null==_?void 0:_.togglesStorageTTL)>0&&(V.experimental.togglesStorageTTL=1e3*_.togglesStorageTTL),V.lastRefreshTimestamp=0,V.ready=new Promise((function(t){V.init().then(t).catch((function(e){console.error(e),V.sdkState="error",V.emit(I.ERROR,e),V.lastError=e,t()}))})),R||console.error('Unleash: You must either provide your own "fetch" implementation or run in an environment where "fetch" is available.'),k||console.error('Unleash: You must either provide your own "AbortController" implementation or run in an environment where "AbortController" is available.'),V.fetch=R,V.createAbortController=k,V.bootstrap=N&&N.length>0?N:void 0,V.bootstrapOverride=P,V.connectionId="xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g,(function(t){var e=16*Math.random()|0;return("x"===t?e:3&e|8).toString(16)})),V.metrics=new d({onError:V.emit.bind(V,I.ERROR),onSent:V.emit.bind(V,I.SENT),appName:b,metricsInterval:h,disableMetrics:y,url:V.url,clientKey:i,fetch:R,headerName:L,customHeaders:j,metricsIntervalInitial:m,connectionId:V.connectionId}),V}return function(t,r){if("function"!=typeof r&&null!==r)throw new TypeError("Class extends value "+String(r)+" is not a constructor or null");function n(){this.constructor=t}e(t,r),t.prototype=null===r?Object.create(r):(n.prototype=r.prototype,new n)}(i,t),i.prototype.getAllToggles=function(){return function(t,e,r){if(r||2===arguments.length)for(var n,o=0,i=e.length;o<i;o++)!n&&o in e||(n||(n=Array.prototype.slice.call(e,0,o)),n[o]=e[o]);return t.concat(n||Array.prototype.slice.call(e))}([],this.toggles,!0)},i.prototype.isEnabled=function(t){var e,r=this.toggles.find((function(e){return e.name===t})),n=!!r&&r.enabled;if(this.metrics.count(t,n),(null==r?void 0:r.impressionData)||this.impressionDataAll){var o=this.eventsHandler.createImpressionEvent(this.context,n,t,R,null!==(e=null==r?void 0:r.impressionData)&&void 0!==e?e:void 0);this.emit(I.IMPRESSION,o)}return n},i.prototype.getVariant=function(t){var e,n=this.toggles.find((function(e){return e.name===t})),o=(null==n?void 0:n.enabled)||!1,i=n?n.variant:k;if(i.name&&this.metrics.countVariant(t,i.name),this.metrics.count(t,o),(null==n?void 0:n.impressionData)||this.impressionDataAll){var s=this.eventsHandler.createImpressionEvent(this.context,o,t,O,null!==(e=null==n?void 0:n.impressionData)&&void 0!==e?e:void 0,i.name);this.emit(I.IMPRESSION,s)}return r(r({},i),{feature_enabled:o})},i.prototype.updateToggles=function(){return n(this,void 0,void 0,(function(){var t=this;return o(this,(function(e){switch(e.label){case 0:return this.timerRef||this.fetchedFromServer?[4,this.fetchToggles()]:[3,2];case 1:return e.sent(),[3,4];case 2:return this.started?[4,new Promise((function(e){var r=function(){t.fetchToggles().then((function(){t.off(I.READY,r),e()}))};t.once(I.READY,r)}))]:[3,4];case 3:e.sent(),e.label=4;case 4:return[2]}}))}))},i.prototype.updateContext=function(t){return n(this,void 0,void 0,(function(){var e;return o(this,(function(n){switch(n.label){case 0:return(t.appName||t.environment)&&console.warn("appName and environment are static. They can't be updated with updateContext."),e={environment:this.context.environment,appName:this.context.appName,sessionId:this.context.sessionId},this.context=r(r({},e),t),[4,this.updateToggles()];case 1:return n.sent(),[2]}}))}))},i.prototype.getContext=function(){return r({},this.context)},i.prototype.setContextField=function(t,e){var n,o;if(S(t))this.context=r(r({},this.context),((n={})[t]=e,n));else{var i=r(r({},this.context.properties),((o={})[t]=e,o));this.context=r(r({},this.context),{properties:i})}this.updateToggles()},i.prototype.removeContextField=function(t){var e;S(t)?this.context=r(r({},this.context),((e={})[t]=void 0,e)):"object"==typeof this.context.properties&&delete this.context.properties[t],this.updateToggles()},i.prototype.setReady=function(){this.readyEventEmitted=!0,this.emit(I.READY)},i.prototype.init=function(){return n(this,void 0,void 0,(function(){var t,e,n;return o(this,(function(o){switch(o.label){case 0:return[4,this.resolveSessionId()];case 1:return t=o.sent(),this.context=r({sessionId:t},this.context),e=this,[4,this.storage.get(N)];case 2:return e.toggles=o.sent()||[],n=this,[4,this.getLastRefreshTimestamp()];case 3:return n.lastRefreshTimestamp=o.sent(),!this.bootstrap||!this.bootstrapOverride&&0!==this.toggles.length?[3,6]:[4,this.storage.save(N,this.bootstrap)];case 4:return o.sent(),this.toggles=this.bootstrap,this.sdkState="healthy",[4,this.storeLastRefreshTimestamp()];case 5:o.sent(),this.setReady(),o.label=6;case 6:return this.sdkState="healthy",this.emit(I.INIT),[2]}}))}))},i.prototype.start=function(){return n(this,void 0,void 0,(function(){var t,e=this;return o(this,(function(r){switch(r.label){case 0:return this.started=!0,this.timerRef?(console.error("Unleash SDK has already started, if you want to restart the SDK you should call client.stop() before starting again."),[2]):[4,this.ready];case 1:return r.sent(),this.metrics.start(),t=this.refreshInterval,[4,this.initialFetchToggles()];case 2:return r.sent(),t>0&&(this.timerRef=setInterval((function(){return e.fetchToggles()}),t)),[2]}}))}))},i.prototype.stop=function(){this.timerRef&&(clearInterval(this.timerRef),this.timerRef=void 0),this.metrics.stop()},i.prototype.isReady=function(){return this.readyEventEmitted},i.prototype.getError=function(){return"error"===this.sdkState?this.lastError:void 0},i.prototype.sendMetrics=function(){return this.metrics.sendMetrics()},i.prototype.resolveSessionId=function(){return n(this,void 0,void 0,(function(){var t;return o(this,(function(e){switch(e.label){case 0:return this.context.sessionId?[2,this.context.sessionId]:[4,this.storage.get("sessionId")];case 1:return(t=e.sent())?[3,3]:(t=Math.floor(1e9*Math.random()),[4,this.storage.save("sessionId",t.toString(10))]);case 2:e.sent(),e.label=3;case 3:return[2,t.toString(10)]}}))}))},i.prototype.getHeaders=function(){return h({clientKey:this.clientKey,connectionId:this.connectionId,appName:this.context.appName,customHeaders:this.customHeaders,headerName:this.headerName,etag:this.etag,isPost:this.usePOSTrequests})},i.prototype.storeToggles=function(t){return n(this,void 0,void 0,(function(){return o(this,(function(e){switch(e.label){case 0:return this.toggles=t,this.emit(I.UPDATE),[4,this.storage.save(N,t)];case 1:return e.sent(),[2]}}))}))},i.prototype.isTogglesStorageTTLEnabled=function(){var t;return!!((null===(t=this.experimental)||void 0===t?void 0:t.togglesStorageTTL)&&this.experimental.togglesStorageTTL>0)},i.prototype.isUpToDate=function(){var t;if(!this.isTogglesStorageTTLEnabled())return!1;var e=Date.now(),r=(null===(t=this.experimental)||void 0===t?void 0:t.togglesStorageTTL)||0;return this.lastRefreshTimestamp>0&&this.lastRefreshTimestamp<=e&&e-this.lastRefreshTimestamp<=r},i.prototype.getLastRefreshTimestamp=function(){return n(this,void 0,void 0,(function(){var t,e;return o(this,(function(r){switch(r.label){case 0:return this.isTogglesStorageTTLEnabled()?[4,this.storage.get(U)]:[3,3];case 1:return t=r.sent(),[4,l(this.context)];case 2:return e=r.sent(),[2,(null==t?void 0:t.key)===e?t.timestamp:0];case 3:return[2,0]}}))}))},i.prototype.storeLastRefreshTimestamp=function(){return n(this,void 0,void 0,(function(){var t,e;return o(this,(function(r){switch(r.label){case 0:return this.isTogglesStorageTTLEnabled()?(this.lastRefreshTimestamp=Date.now(),e={},[4,l(this.context)]):[3,3];case 1:return e.key=r.sent(),e.timestamp=this.lastRefreshTimestamp,t=e,[4,this.storage.save(U,t)];case 2:r.sent(),r.label=3;case 3:return[2]}}))}))},i.prototype.initialFetchToggles=function(){if(!this.isUpToDate())return this.fetchToggles();this.fetchedFromServer||(this.fetchedFromServer=!0,this.setReady())},i.prototype.fetchToggles=function(){return n(this,void 0,void 0,(function(){var t,e,r,n,i,s,a,u,l;return o(this,(function(o){switch(o.label){case 0:if(!this.fetch)return[3,9];this.abortController&&this.abortController.abort(),this.abortController=null===(l=this.createAbortController)||void 0===l?void 0:l.call(this),t=this.abortController?this.abortController.signal:void 0,o.label=1;case 1:return o.trys.push([1,7,8,9]),e=this.usePOSTrequests,r=e?this.url:function(t,e){var r=new URL(t.toString());return Object.entries(e).filter(c).forEach((function(t){var e=t[0],n=t[1];"properties"===e&&n?Object.entries(n).filter(c).forEach((function(t){var e=t[0],n=t[1];return r.searchParams.append("properties[".concat(e,"]"),n)})):r.searchParams.append(e,n)})),r}(this.url,this.context),n=e?"POST":"GET",i=e?JSON.stringify({context:this.context}):void 0,[4,this.fetch(r.toString(),{method:n,cache:"no-cache",headers:this.getHeaders(),body:i,signal:t})];case 2:return s=o.sent(),"error"===this.sdkState&&s.status<400&&(this.sdkState="healthy",this.emit(I.RECOVERED)),s.ok?(this.etag=s.headers.get("ETag")||"",[4,s.json()]):[3,5];case 3:return a=o.sent(),[4,this.storeToggles(a.toggles)];case 4:return o.sent(),"healthy"!==this.sdkState&&(this.sdkState="healthy"),this.fetchedFromServer||(this.fetchedFromServer=!0,this.setReady()),this.storeLastRefreshTimestamp(),[3,6];case 5:304===s.status?this.storeLastRefreshTimestamp():(console.error("Unleash: Fetching feature toggles did not have an ok response"),this.sdkState="error",this.emit(I.ERROR,{type:"HttpError",code:s.status}),this.lastError={type:"HttpError",code:s.status}),o.label=6;case 6:return[3,9];case 7:return"object"==typeof(u=o.sent())&&null!==u&&"name"in u&&"AbortError"===u.name||(console.error("Unleash: unable to fetch feature toggles",u),this.sdkState="error",this.emit(I.ERROR,u),this.lastError=u),[3,9];case 8:return this.abortController=null,[7];case 9:return[2]}}))}))},i}(a);t.EVENTS=I,t.InMemoryStorageProvider=f,t.LocalStorageProvider=v,t.UnleashClient=P,t.lastUpdateKey=U,t.resolveFetch=A}));
 //# sourceMappingURL=main.min.js.map

package.json

 {
   "name": "unleash-proxy-client",
-  "version": "3.7.2",
+  "version": "3.7.3",
   "description": "A browser client that can be used together with Unleash Edge or the Unleash Frontend API.",
@@ -5,0 +5,0 @@ "type": "module",

src/index.ts

@@ -9,6 +9,5 @@ import { TinyEmitter } from 'tiny-emitter';
     computeContextHashValue,
-    notNullOrUndefined,
+    parseHeaders,
     urlWithContextAsQuery,
 } from './util';
-import { sdkVersion } from './version';
 import { uuidv4 } from './uuidv4';
@@ -474,20 +473,11 @@
     private getHeaders() {
-        const isPOST = this.usePOSTrequests;
-        const headers = {
-            [this.headerName]: this.clientKey,
-            Accept: 'application/json',
-            'x-unleash-sdk': sdkVersion,
-            'x-unleash-connection-id': this.connectionId,
-            'x-unleash-appname': this.context.appName,
-        };
-        if (isPOST) {
-            headers['Content-Type'] = 'application/json';
-        }
-        if (this.etag) {
-            headers['If-None-Match'] = this.etag;
-        }
-        Object.entries(this.customHeaders)
-            .filter(notNullOrUndefined)
-            .forEach(([name, value]) => (headers[name] = value));
-        return headers;
+        return parseHeaders({
+            clientKey: this.clientKey,
+            connectionId: this.connectionId,
+            appName: this.context.appName,
+            customHeaders: this.customHeaders,
+            headerName: this.headerName,
+            etag: this.etag,
+            isPost: this.usePOSTrequests,
+        });
     }
@@ -494,0 +484,0 @@

src/metrics.test.ts

@@ -94,3 +94,3 @@ import { FetchMock } from 'jest-fetch-mock';
     expect(requestBody.headers).toMatchObject({
-        NotAuthorization: '123',
+        notauthorization: '123',
     });
@@ -275,3 +275,3 @@ });
         const customHeaders = {
-            Authorization: 'definitely-not-the-client-key',
+            authorization: 'definitely-not-the-client-key',
         };
@@ -308,2 +308,33 @@
     );
+
+    test('Should use case-insensitive headers', () => {
+        const metrics = new Metrics({
+            onError: console.error,
+            appName: 'test',
+            metricsInterval: 5,
+            disableMetrics: false,
+            url: 'http://localhost:3000',
+            clientKey: '123',
+            fetch: fetchMock,
+            headerName: 'Authorization',
+            customHeaders: {
+                'Custom-Header': '123',
+                'custom-header': '456',
+                'unleash-APPname': 'override',
+                'unleash-connection-id': 'override',
+            },
+            connectionId: '123',
+            metricsIntervalInitial: 2,
+        });
+
+        metrics.count('foo', true);
+        metrics.sendMetrics();
+
+        const requestBody = getTypeSafeRequest(fetchMock);
+        expect(requestBody.headers).toMatchObject({
+            'custom-header': '456',
+            'unleash-appname': 'override',
+            'unleash-connection-id': '123',
+        });
+    });
 });

src/metrics.ts

 // Simplified version of: https://github.com/Unleash/unleash-client-node/blob/main/src/metrics.ts
 
-import { notNullOrUndefined } from './util';
-import { sdkVersion } from './version';
+import { parseHeaders } from './util';
 
@@ -125,16 +124,10 @@ export interface MetricsOptions {
     private getHeaders() {
-        const headers = {
-            [this.headerName]: this.clientKey,
-            Accept: 'application/json',
-            'Content-Type': 'application/json',
-            'x-unleash-sdk': sdkVersion,
-            'x-unleash-connection-id': this.connectionId,
-            'x-unleash-appname': this.appName,
-        };
-
-        Object.entries(this.customHeaders)
-            .filter(notNullOrUndefined)
-            .forEach(([name, value]) => (headers[name] = value));
-
-        return headers;
+        return parseHeaders({
+            clientKey: this.clientKey,
+            appName: this.appName,
+            connectionId: this.connectionId,
+            customHeaders: this.customHeaders,
+            headerName: this.headerName,
+            isPost: true,
+        });
     }
@@ -141,0 +134,0 @@

src/util.test.ts

@@ -6,2 +6,3 @@ import type { IContext } from '.';
     urlWithContextAsQuery,
+    parseHeaders,
 } from './util';
@@ -123,1 +124,117 @@
 });
+
+describe('parseHeaders', () => {
+    const clientKey = 'test-client-key';
+    const appName = 'appName';
+    const connectionId = '1234-5678';
+
+    test('should set basic headers correctly', () => {
+        const result = parseHeaders({
+            clientKey,
+            appName,
+            connectionId,
+        });
+
+        expect(result).toEqual({
+            authorization: clientKey,
+            'unleash-sdk': 'unleash-client-js:__VERSION__',
+            'unleash-appname': appName,
+            accept: 'application/json',
+            'unleash-connection-id': connectionId,
+        });
+    });
+
+    test('should set custom client key header name', () => {
+        const result = parseHeaders({
+            clientKey,
+            appName,
+            connectionId,
+            headerName: 'auth',
+        });
+
+        expect(result).toMatchObject({ auth: clientKey });
+        expect(Object.keys(result)).not.toContain('authorization');
+    });
+
+    test('should add custom headers', () => {
+        const customHeaders = {
+            'custom-header': 'custom-value',
+            'unleash-connection-id': 'should-not-be-overwritten',
+            'unleash-appname': 'new-app-name',
+        };
+        const result = parseHeaders({
+            clientKey,
+            appName,
+            connectionId,
+            customHeaders,
+        });
+
+        expect(Object.keys(result)).toHaveLength(6);
+        expect(result).toMatchObject({
+            'custom-header': 'custom-value',
+            'unleash-connection-id': connectionId,
+            'unleash-appname': 'new-app-name',
+        });
+    });
+
+    test('should include etag if provided', () => {
+        const etag = '12345';
+        const result = parseHeaders({
+            clientKey,
+            appName,
+            connectionId,
+            etag,
+        });
+
+        expect(result['if-none-match']).toBe(etag);
+    });
+
+    test('should handle custom headers in a case-insensitive way and normalize them', () => {
+        const customHeaders = {
+            'custom-HEADER': 'custom-value-1',
+            'Custom-Header': 'custom-value-2',
+        };
+        const result = parseHeaders({
+            clientKey,
+            appName,
+            connectionId,
+            customHeaders,
+        });
+
+        expect(result).toMatchObject({
+            'custom-header': 'custom-value-2',
+        });
+    });
+
+    test('should ignore null or undefined custom headers', () => {
+        const customHeaders = {
+            header1: 'value1',
+            header2: null as any,
+            header3: undefined as any,
+        };
+        const result = parseHeaders({
+            clientKey,
+            appName,
+            connectionId,
+            customHeaders,
+        });
+
+        expect(result).toEqual(
+            expect.not.objectContaining({
+                header2: expect.anything(),
+                header3: expect.anything(),
+            })
+        );
+    });
+
+    test('should include content-type for POST requests', () => {
+        const result = parseHeaders({
+            clientKey,
+            appName,
+            connectionId,
+            isPost: true,
+        });
+
+        expect(result['content-type']).toBe('application/json');
+    });
+});

src/util.ts

 import { IContext } from '.';
+import { sdkVersion } from './version';
 
@@ -73,1 +74,44 @@ export const notNullOrUndefined = ([, value]: [string, string]) =>
 };
+
+export const parseHeaders = ({
+    clientKey,
+    appName,
+    connectionId,
+    customHeaders,
+    headerName = 'authorization',
+    etag,
+    isPost,
+}: {
+    clientKey: string;
+    connectionId: string;
+    appName: string;
+    customHeaders?: Record<string, string>;
+    headerName?: string;
+    etag?: string;
+    isPost?: boolean;
+}): Record<string, string> => {
+    const headers: Record<string, string> = {
+        accept: 'application/json',
+        [headerName.toLocaleLowerCase()]: clientKey,
+        'unleash-sdk': sdkVersion,
+        'unleash-appname': appName,
+    };
+
+    if (isPost) {
+        headers['content-type'] = 'application/json';
+    }
+
+    if (etag) {
+        headers['if-none-match'] = etag;
+    }
+
+    Object.entries(customHeaders || {})
+        .filter(notNullOrUndefined)
+        .forEach(
+            ([name, value]) => (headers[name.toLocaleLowerCase()] = value)
+        );
+
+    headers['unleash-connection-id'] = connectionId;
+
+    return headers;
+};

src/version.ts

@@ -1,1 +0,1 @@
-export const sdkVersion = `unleash-js@__VERSION__`;
+export const sdkVersion = `unleash-client-js:__VERSION__`;

No alert changes

Improved metrics

Total package byte prevSize

383781

increased by1.55%

Lines of code

4170

increased by4.09%

No dependency changes