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41 lines
2.3 KiB
JavaScript
41 lines
2.3 KiB
JavaScript
/*! formdata-polyfill. MIT License. Jimmy Wärting <https://jimmy.warting.se/opensource> */
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import C from 'fetch-blob'
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import F from 'fetch-blob/file.js'
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var {toStringTag:t,iterator:i,hasInstance:h}=Symbol,
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r=Math.random,
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m='append,set,get,getAll,delete,keys,values,entries,forEach,constructor'.split(','),
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f=(a,b,c)=>(a+='',/^(Blob|File)$/.test(b && b[t])?[(c=c!==void 0?c+'':b[t]=='File'?b.name:'blob',a),b.name!==c||b[t]=='blob'?new F([b],c,b):b]:[a,b+'']),
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e=(c,f)=>(f?c:c.replace(/\r?\n|\r/g,'\r\n')).replace(/\n/g,'%0A').replace(/\r/g,'%0D').replace(/"/g,'%22'),
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x=(n, a, e)=>{if(a.length<e){throw new TypeError(`Failed to execute '${n}' on 'FormData': ${e} arguments required, but only ${a.length} present.`)}}
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export const File = F
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/** @type {typeof globalThis.FormData} */
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export const FormData = class FormData {
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#d=[];
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constructor(...a){if(a.length)throw new TypeError(`Failed to construct 'FormData': parameter 1 is not of type 'HTMLFormElement'.`)}
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get [t]() {return 'FormData'}
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[i](){return this.entries()}
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static [h](o) {return o&&typeof o==='object'&&o[t]==='FormData'&&!m.some(m=>typeof o[m]!='function')}
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append(...a){x('append',arguments,2);this.#d.push(f(...a))}
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delete(a){x('delete',arguments,1);a+='';this.#d=this.#d.filter(([b])=>b!==a)}
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get(a){x('get',arguments,1);a+='';for(var b=this.#d,l=b.length,c=0;c<l;c++)if(b[c][0]===a)return b[c][1];return null}
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getAll(a,b){x('getAll',arguments,1);b=[];a+='';this.#d.forEach(c=>c[0]===a&&b.push(c[1]));return b}
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has(a){x('has',arguments,1);a+='';return this.#d.some(b=>b[0]===a)}
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forEach(a,b){x('forEach',arguments,1);for(var [c,d]of this)a.call(b,d,c,this)}
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set(...a){x('set',arguments,2);var b=[],c=!0;a=f(...a);this.#d.forEach(d=>{d[0]===a[0]?c&&(c=!b.push(a)):b.push(d)});c&&b.push(a);this.#d=b}
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*entries(){yield*this.#d}
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*keys(){for(var[a]of this)yield a}
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*values(){for(var[,a]of this)yield a}}
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/** @param {FormData} F */
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export function formDataToBlob (F,B=C){
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var b=`${r()}${r()}`.replace(/\./g, '').slice(-28).padStart(32, '-'),c=[],p=`--${b}\r\nContent-Disposition: form-data; name="`
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F.forEach((v,n)=>typeof v=='string'
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?c.push(p+e(n)+`"\r\n\r\n${v.replace(/\r(?!\n)|(?<!\r)\n/g, '\r\n')}\r\n`)
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:c.push(p+e(n)+`"; filename="${e(v.name, 1)}"\r\nContent-Type: ${v.type||"application/octet-stream"}\r\n\r\n`, v, '\r\n'))
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c.push(`--${b}--`)
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return new B(c,{type:"multipart/form-data; boundary="+b})}
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