codex-bot
5c89d27528
waterfall-wiki CI and deployment / verify-and-deploy (pull_request) Has been cancelled
23 lines
3.1 KiB
TypeScript
23 lines
3.1 KiB
TypeScript
import { z } from 'zod';
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const kind=z.enum(['guide','context','evidence']);
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export const validXmlText=(value:string)=>!/[\u0000-\u0008\u000b\u000c\u000e-\u001f\ufffe\uffff]/.test(value)&&!/[\ud800-\udfff]/u.test(value);
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const text=z.string().refine(validXmlText,'非法 XML 字符').trim().min(1).max(20000);
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export const documentInput=z.object({id:z.string().regex(/^user-[a-z0-9-]{1,74}$/),revision:z.number().int().min(1).max(2147483647),kind,title:text.max(200),summary:text.max(1000),applies:text,body:text,steps:z.array(text).max(100),checks:z.array(text).max(100),links:z.array(z.object({target:z.string().regex(/^[a-z0-9-]{1,79}$/),revision:z.number().int().min(1).max(2147483647),relation:kind,when:text.max(1000),label:text.max(200)}).strict()).max(100),tags:z.array(text.max(80)).max(20)}).strict();
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// Deliberately narrow XML 1.0 grammar: no DTD, comments, CDATA, nested markup or arbitrary entities.
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export function parseDocumentXml(source:string){
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if(!validXmlText(source)||source.includes(']]>'))throw Error('非法 XML 字符');
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if(Buffer.byteLength(source)>131072)throw Error('XML 过大');
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const trimXml=(v:string)=>v.replace(/^[ \t\r\n]+|[ \t\r\n]+$/g,'');
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let s=source.replace(/^<\?xml version="1.0" encoding="UTF-8"\?>[ \t\r\n]*/, '');
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if(/<\?|<!/.test(s))throw Error('不支持 XML 声明或嵌入');
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const decode=(v:string)=>{if(/&(?!amp;|lt;|gt;|quot;|apos;)/.test(v))throw Error('非法实体');return v.replace(/&(amp|lt|gt|quot|apos);/g,(_,k)=>({amp:'&',lt:'<',gt:'>',quot:'"',apos:"'"}[k as 'amp'|'lt'|'gt'|'quot'|'apos'] as string));};
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const attrs=(v:string)=>{const result:Record<string,string>={};while(trimXml(v)){const m=/^[ \t\r\n]+([a-z]+)="([^"<]*)"/.exec(v);if(!m||m[1] in result)throw Error('非法或重复属性');result[m[1]]=decode(m[2]);v=v.slice(m[0].length);}return result;};
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const root=/^<guidance((?:[ \t\r\n]+[a-z]+="[^"<]*")+[ \t\r\n]*)>([\s\S]*)<\/guidance>[ \t\r\n]*$/.exec(s);if(!root)throw Error('非法根元素');const a=attrs(root[1]);
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if(Object.keys(a).sort().join(',')!=='id,kind,lang,revision,xmlns'||a.xmlns!=='urn:linked-guidance:0.1'||a.lang!=='zh-CN'||! /^[1-9][0-9]*$/.test(a.revision))throw Error('不支持的协议或属性');
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const result:Record<string,unknown>={id:a.id,kind:a.kind,revision:Number(a.revision),steps:[],checks:[],links:[],tags:[]};s=root[2];
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while(trimXml(s)){const m=/^[ \t\r\n]*<(title|summary|applies|body|step|check|tag|link)((?:[ \t\r\n]+[a-z]+="[^"<]*")*[ \t\r\n]*)>([^<]*)<\/\1>/.exec(s);if(!m)throw Error('非法子元素');const [,tag,raw,value]=m;const at=attrs(raw);const v=decode(value);
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if(tag==='link'){if(Object.keys(at).sort().join(',')!=='relation,revision,target,when'||! /^[1-9][0-9]*$/.test(at.revision))throw Error('非法链接');(result.links as unknown[]).push({...at,revision:Number(at.revision),label:v});}
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else {if(Object.keys(at).length)throw Error('非法属性');if(tag==='step'||tag==='check'||tag==='tag')(result[tag==='step'?'steps':tag==='tag'?'tags':'checks'] as string[]).push(v);else{if(tag in result)throw Error('重复元素');result[tag]=v;}}s=s.slice(m[0].length);}
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return documentInput.parse(result);
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}
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