adding hash get route

routes/hash.js

@@ -61,38 +61,47 @@ async function fetchAndHashContent(url, visitedUrls = new Set()) {
 }
 
 const hashCache = new Map();
+router.get("/", async (req, res) => {
+    const { url } = req.query;
+    if (!url) {
+        return res.status(400).json({ error: 'Missing <url> in the query parameters' });
+    }
+    res.json(await generateHash(url));
+})
 // API endpoint to start the recursive download and hashing
 router.post('/', async (req, res) => {
     try {
-        let { urls } = req.body;
+        const { urls } = req.body;
         if (!urls) {
             return res.status(400).json({ error: 'Missing <urls> in the request parameters' });
         }
-        if (!Array.isArray(urls))
+        res.json(await generateHash(urls));
-            urls = [urls];
-        const promises = urls.map(async (url) => {
-            const urlWithoutHashAndQuery = parseUrlWithoutHashAndQuery(url);
-            let hash;
-            // regex to identify owner and repo name from https://owner.github.io/repo-name
-            const githubRepoRegex = /https?:\/\/([\w-]+)\.github\.io\/([\w-]+)/;
-            if (githubRepoRegex.test(urlWithoutHashAndQuery) && urlWithoutHashAndQuery.match(githubRepoRegex)[1] === 'ranchimall') {
-                if (!hashCache.has(urlWithoutHashAndQuery)) {
-                    await fetchAndSaveAppHash(urlWithoutHashAndQuery)
-                }
-                hash = hashCache.get(urlWithoutHashAndQuery).hash;
-            } else {
-                const hashedContent = await fetchAndHashContent(urlWithoutHashAndQuery);
-                hash = await hashContent(Buffer.from(hashedContent, 'utf-8'));
-            }
-            return { url, hash };
-        });
-
-        const results = await Promise.all(promises);
-        res.json(results);
     } catch (error) {
         res.status(500).json({ error: error.message });
     }
 });
+async function generateHash(urls = []) {
+    if (!Array.isArray(urls))
+        urls = [urls];
+    const promises = urls.map(async (url) => {
+        const urlWithoutHashAndQuery = parseUrlWithoutHashAndQuery(url);
+        let hash;
+        // regex to identify owner and repo name from https://owner.github.io/repo-name
+        const githubRepoRegex = /https?:\/\/([\w-]+)\.github\.io\/([\w-]+)/;
+        if (githubRepoRegex.test(urlWithoutHashAndQuery) && urlWithoutHashAndQuery.match(githubRepoRegex)[1] === 'ranchimall') {
+            if (!hashCache.has(urlWithoutHashAndQuery)) {
+                await fetchAndSaveAppHash(urlWithoutHashAndQuery)
+            }
+            hash = hashCache.get(urlWithoutHashAndQuery).hash;
+        } else {
+            const hashedContent = await fetchAndHashContent(urlWithoutHashAndQuery);
+            hash = await hashContent(Buffer.from(hashedContent, 'utf-8'));
+        }
+        return { url, hash };
+    });
+
+    return await Promise.all(promises);
+}
 async function fetchAndSaveAppHash(url, lastUpdated = Date.now()) {
     const hashedContent = await fetchAndHashContent(url);
     const hash = await hashContent(Buffer.from(hashedContent, 'utf-8'));

routes/hash.min.js

@@ -1 +1 @@
-const express=require("express"),router=express.Router(),axios=require("axios"),{createHash:createHash}=require("crypto"),{parse:parseUrl,URL:URL}=require("url"),{parse:parseHtml}=require("node-html-parser");function addProtocolToUrl(url){return url.startsWith("http://")||url.startsWith("https://")||(url="https://"+url),url}function parseUrlWithoutHashAndQuery(fullUrl){fullUrl=addProtocolToUrl(fullUrl);const parsedUrl=new URL(fullUrl);parsedUrl.hash="",parsedUrl.search="";return parsedUrl.toString()}async function hashContent(content){const hash=createHash("sha256");return hash.update(content),hash.digest("hex")}async function fetchAndHashContent(url,visitedUrls=new Set){if(visitedUrls.has(url))return"";visitedUrls.add(url);const content=(await axios.get(url,{responseType:"arraybuffer"})).data.toString("utf-8"),linkedResources=parseHtml(content).querySelectorAll('link[rel="stylesheet"], script[src]');return`${content}_${(await Promise.all(linkedResources.map((async resource=>{const resourceUrl=parseUrl(resource.getAttribute("href")||resource.getAttribute("src"),!0);let absoluteResourceUrl=resourceUrl.href;resourceUrl.hostname||(resourceUrl.path.startsWith("/")||url.endsWith("/")||(url+="/"),absoluteResourceUrl=`${url}${resourceUrl.path}`);const resourceContent=await fetchAndHashContent(absoluteResourceUrl,visitedUrls);return`${resourceUrl.path}_${resourceContent}`})))).join("_")}`}const hashCache=new Map;async function fetchAndSaveAppHash(url,lastUpdated=Date.now()){const hashedContent=await fetchAndHashContent(url),hash=await hashContent(Buffer.from(hashedContent,"utf-8"));hashCache.set(url,{hash:hash,lastUpdated:lastUpdated})}router.post("/",(async(req,res)=>{try{let{urls:urls}=req.body;if(!urls)return res.status(400).json({error:"Missing <urls> in the request parameters"});Array.isArray(urls)||(urls=[urls]);const promises=urls.map((async url=>{const urlWithoutHashAndQuery=parseUrlWithoutHashAndQuery(url);let hash;const githubRepoRegex=/https?:\/\/([\w-]+)\.github\.io\/([\w-]+)/;if(githubRepoRegex.test(urlWithoutHashAndQuery)&&"ranchimall"===urlWithoutHashAndQuery.match(githubRepoRegex)[1])hashCache.has(urlWithoutHashAndQuery)||await fetchAndSaveAppHash(urlWithoutHashAndQuery),hash=hashCache.get(urlWithoutHashAndQuery).hash;else{const hashedContent=await fetchAndHashContent(urlWithoutHashAndQuery);hash=await hashContent(Buffer.from(hashedContent,"utf-8"))}return{url:url,hash:hash}})),results=await Promise.all(promises);res.json(results)}catch(error){res.status(500).json({error:error.message})}})),router.post("/gitwh",(async(req,res)=>{try{if(!req.headers["user-agent"].startsWith("GitHub-Hookshot/"))return res.json({message:"ignored"});const{repository:{pushed_at:pushed_at,organization:organization,name:name,has_pages:has_pages}}=req.body;if(!has_pages)return res.json({message:"ignored"});const url=`https://${organization}.github.io/${name}`;await fetchAndSaveAppHash(url,pushed_at),res.json({message:"success"})}catch(err){res.status(500).json({error:err.message})}})),module.exports=router;
+const express=require("express"),router=express.Router(),axios=require("axios"),{createHash:createHash}=require("crypto"),{parse:parseUrl,URL:URL}=require("url"),{parse:parseHtml}=require("node-html-parser");function addProtocolToUrl(url){return url.startsWith("http://")||url.startsWith("https://")||(url="https://"+url),url}function parseUrlWithoutHashAndQuery(fullUrl){fullUrl=addProtocolToUrl(fullUrl);const parsedUrl=new URL(fullUrl);parsedUrl.hash="",parsedUrl.search="";return parsedUrl.toString()}async function hashContent(content){const hash=createHash("sha256");return hash.update(content),hash.digest("hex")}async function fetchAndHashContent(url,visitedUrls=new Set){if(visitedUrls.has(url))return"";visitedUrls.add(url);const content=(await axios.get(url,{responseType:"arraybuffer"})).data.toString("utf-8"),linkedResources=parseHtml(content).querySelectorAll('link[rel="stylesheet"], script[src]');return`${content}_${(await Promise.all(linkedResources.map((async resource=>{const resourceUrl=parseUrl(resource.getAttribute("href")||resource.getAttribute("src"),!0);let absoluteResourceUrl=resourceUrl.href;resourceUrl.hostname||(resourceUrl.path.startsWith("/")||url.endsWith("/")||(url+="/"),absoluteResourceUrl=`${url}${resourceUrl.path}`);const resourceContent=await fetchAndHashContent(absoluteResourceUrl,visitedUrls);return`${resourceUrl.path}_${resourceContent}`})))).join("_")}`}const hashCache=new Map;async function generateHash(urls=[]){Array.isArray(urls)||(urls=[urls]);const promises=urls.map((async url=>{const urlWithoutHashAndQuery=parseUrlWithoutHashAndQuery(url);let hash;const githubRepoRegex=/https?:\/\/([\w-]+)\.github\.io\/([\w-]+)/;if(githubRepoRegex.test(urlWithoutHashAndQuery)&&"ranchimall"===urlWithoutHashAndQuery.match(githubRepoRegex)[1])hashCache.has(urlWithoutHashAndQuery)||await fetchAndSaveAppHash(urlWithoutHashAndQuery),hash=hashCache.get(urlWithoutHashAndQuery).hash;else{const hashedContent=await fetchAndHashContent(urlWithoutHashAndQuery);hash=await hashContent(Buffer.from(hashedContent,"utf-8"))}return{url:url,hash:hash}}));return await Promise.all(promises)}async function fetchAndSaveAppHash(url,lastUpdated=Date.now()){const hashedContent=await fetchAndHashContent(url),hash=await hashContent(Buffer.from(hashedContent,"utf-8"));hashCache.set(url,{hash:hash,lastUpdated:lastUpdated})}router.get("/",(async(req,res)=>{const{url:url}=req.query;if(!url)return res.status(400).json({error:"Missing <url> in the query parameters"});res.json(await generateHash(url))})),router.post("/",(async(req,res)=>{try{const{urls:urls}=req.body;if(!urls)return res.status(400).json({error:"Missing <urls> in the request parameters"});res.json(await generateHash(urls))}catch(error){res.status(500).json({error:error.message})}})),router.post("/gitwh",(async(req,res)=>{try{if(!req.headers["user-agent"].startsWith("GitHub-Hookshot/"))return res.json({message:"ignored"});const{repository:{pushed_at:pushed_at,organization:organization,name:name,has_pages:has_pages}}=req.body;if(!has_pages)return res.json({message:"ignored"});const url=`https://${organization}.github.io/${name}`;await fetchAndSaveAppHash(url,pushed_at),res.json({message:"success"})}catch(err){res.status(500).json({error:err.message})}})),module.exports=router;