36 lines
2.3 KiB
JavaScript
36 lines
2.3 KiB
JavaScript
(()=>{
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'use strict';
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const READ_RPCS=new Set(['sun_my_workspaces','sun_fetch_app_state','sun_is_platform_admin']);
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function create({upstream,proxy,timeout=7000,fallbackTimeout=4000}){
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const origin=new URL(upstream).origin;
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return async function(input,init={}){
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const original=new Request(input,init),url=new URL(original.url),isBackend=url.origin===origin;
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const read=original.method==='GET'||original.method==='HEAD'||(original.method==='POST'&&url.pathname.startsWith('/rest/v1/rpc/')&&READ_RPCS.has(url.pathname.slice('/rest/v1/rpc/'.length)));
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const passwordLogin=original.method==='POST'&&url.pathname==='/auth/v1/token'&&url.searchParams.get('grant_type')==='password';
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const safeFallback=isBackend&&(read||passwordLogin);
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const expectJson=original.method!=='HEAD'&&(passwordLogin||url.pathname.startsWith('/rest/v1/rpc/')||(read&&(url.pathname.startsWith('/rest/v1/')||url.pathname.startsWith('/auth/v1/'))));
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async function attempt(target,limit){
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const controller=new AbortController(),abort=()=>controller.abort(original.signal.reason);
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if(original.signal.aborted)abort();else original.signal.addEventListener('abort',abort,{once:true});
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const timer=setTimeout(()=>controller.abort(),limit);
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try{
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const response=await fetch(new Request(target,original.clone()),{signal:controller.signal});
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if(expectJson&&response.ok&&response.status!==204){
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const text=await response.clone().text();
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try{if(!text.trim()||!response.headers.get('content-type')?.includes('json'))throw new Error();JSON.parse(text)}
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catch(_){throw new Error('Сервис вернул пустой или некорректный ответ. Повторите загрузку.')}
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}
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return response;
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}finally{clearTimeout(timer);original.signal.removeEventListener('abort',abort)}
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}
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try{
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const response=await attempt(isBackend?proxy+url.pathname+url.search:original.url,timeout);
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if(!safeFallback||response.status<500)return response;
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}catch(error){if(!safeFallback||original.signal.aborted)throw error}
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// Same backend, same authorization, one SDK session. Never replay writes.
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return attempt(original.url,fallbackTimeout);
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};
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}
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window.CateriumCloudTransport=Object.freeze({create});
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})();
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