@libp2p/multistream-select/dist/index.min.js

JavaScript implementation of multistream-select

(function (root, factory) {(typeof module === 'object' && module.exports) ? module.exports = factory() : root.Libp2PMultistreamSelect = factory()}(typeof self !== 'undefined' ? self : this, function () {
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t.read({...i,bytes:a});if(u==null)throw r.log.error("tried to read %d bytes but the stream closed",a),new _(`Unexpected EOF - tried to read ${a} bytes but the stream closed`);if(u.byteLength!==a)throw r.log.error("read %d/%d bytes before the stream closed",u.byteLength,a),new _(`Unexpected EOF - read ${u.byteLength}/${a} bytes before the stream closed`);return u},async write(i,a){await t.write(new x(o(i.byteLength),i),a)},async writeV(i,a){let c=new x(...i.flatMap(u=>[o(u.byteLength),u]));await t.write(c,a)},unwrap(){return t.unwrap()}}}var de=class extends Error{name="InvalidMessageLengthError";code="ERR_INVALID_MSG_LENGTH"},X=class extends Error{name="InvalidDataLengthError";code="ERR_MSG_DATA_TOO_LONG"},me=class extends Error{name="InvalidDataLengthLengthError";code="ERR_MSG_LENGTH_TOO_LONG"},Z=class extends Error{name="UnexpectedEOFError";code="ERR_UNEXPECTED_EOF"};function pe(r){return r[Symbol.asyncIterator]!=null}function Ot(r,e){if(r.byteLength>e)throw new X("Message length too long")}var we=r=>{let e=F(r),t=I(e);return ue(r,t),we.bytes=e,t};we.bytes=0;function ge(r,e){e=e??{};let t=e.lengthEncoder??we,n=e?.maxDataLength??4194304;function*o(s){Ot(s,n);let i=t(s.byteLength);i instanceof Uint8Array?yield i:yield*i,s instanceof Uint8Array?yield s:yield*s}return pe(r)?(async function*(){for await(let s of r)yield*o(s)})():(function*(){for(let s of r)yield*o(s)})()}ge.single=(r,e)=>{e=e??{};let t=e.lengthEncoder??we,n=e?.maxDataLength??4194304;return Ot(r,n),new x(t(r.byteLength),r)};var k;(function(r){r[r.LENGTH=0]="LENGTH",r[r.DATA=1]="DATA"})(k||(k={}));var rt=r=>{let e=le(r);return rt.bytes=F(e),e};rt.bytes=0;function tt(r,e){let t=new x,n=k.LENGTH,o=-1,s=e?.lengthDecoder??rt,i=e?.maxLengthLength??8,a=e?.maxDataLength??4194304;function*c(){for(;t.byteLength>0;){if(n===k.LENGTH)try{if(o=s(t),o<0)throw new de("Invalid message length");if(o>a)throw new X("Message length too long");let u=s.bytes;t.consume(u),e?.onLength!=null&&e.onLength(o),n=k.DATA}catch(u){if(u instanceof RangeError){if(t.byteLength>i)throw new me("Message length length too long");break}throw u}if(n===k.DATA){if(t.byteLength<o)break;let u=t.sublist(0,o);t.consume(o),e?.onData!=null&&e.onData(u),yield u,n=k.LENGTH}}}return pe(r)?(async function*(){for await(let u of r)t.append(u),yield*c();if(t.byteLength>0)throw new Z("Unexpected end of input")})():(function*(){for(let u of r)t.append(u),yield*c();if(t.byteLength>0)throw new Z("Unexpected end of input")})()}tt.fromReader=(r,e)=>{let t=1,n=(async function*(){for(;;)try{let{done:s,value:i}=await r.next(t);if(s===!0)return;i!=null&&(yield i)}catch(s){if(s.code==="ERR_UNDER_READ")return{done:!0,value:null};throw s}finally{t=1}})();return tt(n,{...e??{},onLength:s=>{t=s}})};var bn=L(`
`);async function ee(r,e){let n=(await r.read(e)).subarray();if(n.byteLength===0||n[n.length-1]!==bn[0])throw new oe("Missing newline");return Ut(n).trimEnd()}async function Ft(r,e,t={}){if(e=Array.isArray(e)?[...e]:[e],e.length===0)throw new Error("At least one protocol must be specified");let n=r.log.newScope("mss:select"),o=he(r,{...t,maxDataLength:1024});for(let s=0;s<e.length;s++){let i=e[s],a;if(s===0){n.trace('write ["%s", "%s"]',S,i);let c=L(`${S}
`),u=L(`${i}
`);if(await o.writeV([c,u],t),n.trace("reading multistream-select header"),a=await ee(o,t),n.trace('read "%s"',a),a!==S){n.error("did not read multistream-select header from response");break}}else n.trace('write "%s"',i),await o.write(L(`${i}
`),t);if(n.trace("reading protocol response"),a=await ee(o,t),n.trace('read "%s"',a),a===i)return n.trace('selected "%s" after negotiation',a),o.unwrap(),i}throw new ne(`Protocol selection failed - could not negotiate ${e}`)}async function Pt(r,e,t={}){e=Array.isArray(e)?e:[e];let n=r.log.newScope("mss:handle"),o=he(r,{...t,maxDataLength:1024,maxLengthLength:2});for(;;){n.trace("reading incoming string");let s=await ee(o,t);if(n.trace('read "%s"',s),s===S){n.trace('respond with "%s" for "%s"',S,s),await o.write(L(`${S}
`),t),n.trace('responded with "%s" for "%s"',S,s);continue}if(e.includes(s))return n.trace('respond with "%s" for "%s"',s,s),await o.write(L(`${s}
`),t),n.trace('responded with "%s" for "%s"',s,s),o.unwrap(),s;if(s==="ls"){let i=new x(...e.map(a=>ge.single(L(`${a}
`))),L(`
`));n.trace('respond with "%s" for %s',e,s),await o.write(i,t),n.trace('responded with "%s" for %s',e,s);continue}n.trace('respond with "na" for "%s"',s),await o.write(L(`na
`),t),n('responded with "na" for "%s"',s)}}return kt(wn);})();
return Libp2PMultistreamSelect}));
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