@mux/upchunk/dist/upchunk.cjs.js

Dead simple chunked file uploads using Fetch

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Falling back to in-memory FileReader!`),r.stopImmediatePropagation(),this.chunkedIterable=new F(this.file,{...e,defaultChunkSize:e.chunkSize}),this.chunkedIterator=this.chunkedIterable[Symbol.asyncIterator](),this.getEndpoint().then(()=>{this.sendChunks()}).catch(i=>{let a=i!=null&&i.message?`: ${i.message}`:"";this.dispatch("error",{message:`Failed to get endpoint${a}`})}),this.off("error",n))};this.on("error",n)}this.chunkedIterable=new x(this.file.stream(),{...e,defaultChunkSize:e.chunkSize}),this.chunkedIterator=this.chunkedIterable[Symbol.asyncIterator](),this.totalChunks=Math.ceil(this.file.size/this.chunkByteSize),this.validateOptions(),this.getEndpoint().then(()=>this.sendChunks()).catch(n=>{let r=n!=null&&n.message?`: ${n.message}`:"";this.dispatch("error",{message:`Failed to get endpoint${r}`})}),typeof window!="undefined"&&(window.addEventListener("online",()=>{!this.offline||(this._offline=!1,this.dispatch("online"),this.sendChunks())}),window.addEventListener("offline",()=>{this.offline||(this._offline=!0,this.dispatch("offline"))}))}get maxChunkSize(){var e,n;return(n=(e=this.chunkedIterable)==null?void 0:e.maxChunkSize)!=null?n:O}get minChunkSize(){var e,n;return(n=(e=this.chunkedIterable)==null?void 0:e.minChunkSize)!=null?n:A}get chunkSize(){var e,n;return(n=(e=this.chunkedIterable)==null?void 0:e.chunkSize)!=null?n:q}set chunkSize(e){this.chunkedIterable.chunkSize=e}get chunkByteSize(){return this.chunkedIterable.chunkByteSize}get totalChunkSize(){return Math.ceil(this.file.size/this.chunkByteSize)}on(e,n){this.eventTarget.addEventListener(e,n)}once(e,n){this.eventTarget.addEventListener(e,n,{once:!0})}off(e,n){this.eventTarget.removeEventListener(e,n)}get offline(){return this._offline}get paused(){return this._paused}abort(){var e;this.pause(),(e=this.currentXhr)==null||e.abort()}pause(){this._paused=!0}resume(){this._paused&&(this._paused=!1,this.sendChunks())}get successfulPercentage(){return this.nextChunkRangeStart/this.file.size}dispatch(e,n){let r=new CustomEvent(e,{detail:n});this.eventTarget.dispatchEvent(r)}validateOptions(){if(!this.endpoint||typeof this.endpoint!="function"&&typeof this.endpoint!="string")throw new TypeError("endpoint must be defined as a string or a function that returns a promise");if(!(this.file instanceof File))throw new TypeError("file must be a File object");if(this.headers&&typeof this.headers!="function"&&typeof this.headers!="object")throw new TypeError("headers must be null, an object, or a function that returns an object or a promise");if(!R(this.chunkSize,{maxChunkSize:this.maxChunkSize,minChunkSize:this.minChunkSize}))throw z(this.chunkSize,{maxChunkSize:this.maxChunkSize,minChunkSize:this.minChunkSize});if(this.maxChunkSize&&(typeof this.maxChunkSize!="number"||this.maxChunkSize<256||this.maxChunkSize%256!==0||this.maxChunkSize<this.chunkSize||this.maxChunkSize<this.minChunkSize))throw new TypeError(`maxChunkSize must be a positive number in multiples of 256, and larger than or equal to both ${this.minChunkSize} and ${this.chunkSize}`);if(this.minChunkSize&&(typeof this.minChunkSize!="number"||this.minChunkSize<256||this.minChunkSize%256!==0||this.minChunkSize>this.chunkSize||this.minChunkSize>this.maxChunkSize))throw new TypeError(`minChunkSize must be a positive number in multiples of 256, and smaller than ${this.chunkSize} and ${this.maxChunkSize}`);if(this.maxFileBytes>0&&this.maxFileBytes<this.file.size)throw new Error(`file size exceeds maximum (${this.file.size} > ${this.maxFileBytes})`);if(this.attempts&&(typeof this.attempts!="number"||this.attempts<=0))throw new TypeError("retries must be a positive number");if(this.delayBeforeAttempt&&(typeof this.delayBeforeAttempt!="number"||this.delayBeforeAttempt<0))throw new TypeError("delayBeforeAttempt must be a positive number")}getEndpoint(){return typeof this.endpoint=="string"?(this.endpointValue=this.endpoint,Promise.resolve(this.endpoint)):this.endpoint(this.file).then(e=>{if(this.endpointValue=e,typeof e!="string")throw new TypeError("endpoint must return a string");return this.endpointValue})}xhrPromise(e){let n=r=>{r.upload.onprogress=i=>{var h;let a=this.totalChunks-this.chunkCount,o=(this.file.size-this.nextChunkRangeStart)/this.file.size/a,u=i.loaded/((h=i.total)!=null?h:this.chunkByteSize)*o;this.dispatch("progress",Math.min((this.successfulPercentage+u)*100,100))}};return new Promise((r,i)=>{this.currentXhr=(0,Le.default)({...e,beforeSend:n},(a,o)=>(this.currentXhr=void 0,a?i(a):r(o)))})}async sendChunk(e){let n=this.nextChunkRangeStart,r=n+e.size-1,a={...await(typeof this.headers=="function"?this.headers():this.headers),"Content-Type":this.file.type,"Content-Range":`bytes ${n}-${r}/${this.file.size}`};return this.dispatch("attempt",{chunkNumber:this.chunkCount,totalChunks:this.totalChunks,chunkSize:this.chunkSize}),this.xhrPromise({headers:a,url:this.endpointValue,method:this.method,body:e})}async sendChunkWithRetries(e){let n=async(s,u)=>{var d;let f=(new Date().getTime()-this.lastChunkStart.getTime())/1e3;if(this.dispatch("chunkSuccess",{chunk:this.chunkCount,chunkSize:this.chunkSize,attempts:this.attemptCount,timeInterval:f,response:s}),this.attemptCount=0,this.chunkCount=((d=this.chunkCount)!=null?d:0)+1,this.nextChunkRangeStart=this.nextChunkRangeStart+this.chunkByteSize,this.dynamicChunkSize){let y=this.chunkSize;f<10?y=Math.min(this.chunkSize*2,this.maxChunkSize):f>30&&(y=Math.max(this.chunkSize/2,this.minChunkSize)),this.chunkSize=Math.ceil(y/256)*256;let p=(this.file.size-this.nextChunkRangeStart)/this.chunkByteSize;this.totalChunks=Math.ceil(this.chunkCount+p)}return!0},r=async(s,u)=>(this.dispatch("progress",Math.min(this.successfulPercentage*100,100)),this.dispatch("error",{message:`Server responded with ${s.statusCode}. Stopping upload.`,chunk:this.chunkCount,attempts:this.attemptCount,response:s}),!1),i=async(s,u)=>(this.dispatch("attemptFailure",{message:`An error occured uploading chunk ${this.chunkCount}. ${this.attempts-this.attemptCount} retries left.`,chunkNumber:this.chunkCount,attemptsLeft:this.attempts-this.attemptCount,response:s}),new Promise(h=>{setTimeout(async()=>{if(this._paused||this.offline){this.pendingChunk=e,h(!1);return}let f=await this.sendChunkWithRetries(e);h(f)},this.delayBeforeAttempt*1e3)})),a;try{this.attemptCount=this.attemptCount+1,this.lastChunkStart=new Date,a=await this.sendChunk(e)}catch(s){typeof(s==null?void 0:s.statusCode)=="number"&&(a=s)}let o={retryCodes:this.retryCodes,attemptCount:this.attemptCount,attempts:this.attempts,currentChunkEndByte:this.nextChunkRangeStart+e.size-1};return Fe(a,o)?i(a,e):xe(a,o)?n(a,e):zt(a,o)?r(a,e):i(a,e)}async sendChunks(){if(this.pendingChunk&&!(this._paused||this.offline)){let e=this.pendingChunk;this.pendingChunk=void 0;let n=await this.sendChunkWithRetries(e);this.success&&n&&this.dispatch("success")}for(;!(this.success||this._paused||this.offline);){let{value:e,done:n}=await this.chunkedIterator.next(),r=!e&&n;if(e&&(r=await this.sendChunkWithRetries(e)),this.chunkedIterable.error){r=!1,this.dispatch("error",{message:`Unable to read file of size ${this.file.size} bytes. Try loading from another browser.`});return}if(this.success=!!n,this.success&&r&&this.dispatch("success"),!r)return}}};function Tt(t){return T.createUpload(t)}
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