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Add linked data module which scrapes websites

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This commit is contained in:
Pieter Vander Vennet 2024-02-22 18:58:34 +01:00
parent 2af6af7630
commit 35c31f9861
15 changed files with 870 additions and 130 deletions
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16
scripts/serverLdScrape.ts
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@ -8,32 +8,40 @@ class ServerLdScrape extends Script {
}
async main(args: string[]): Promise<void> {
const port = Number(args[0] ?? 2346)
const cache: Record<string, any> = []
new Server(port, {}, [
{
mustMatch: "extractgraph",
mimetype: "application/ld+json",
async handle(content, searchParams: URLSearchParams) {
const url = searchParams.get("url")
if (cache[url]) {
return JSON.stringify(cache[url])
}
const dloaded = await Utils.download(url, {
"User-Agent":
"MapComplete/openstreetmap scraper; pietervdvn@posteo.net; https://github.com/pietervdvn/MapComplete",
"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36", // "MapComplete/openstreetmap scraper; pietervdvn@posteo.net; https://github.com/pietervdvn/MapComplete",
})
// return dloaded
const parsed = parse(dloaded)
const scripts = Array.from(parsed.getElementsByTagName("script"))
const snippets = []
for (const script of scripts) {
const tp = script.attributes["type"]
if (tp !== "application/ld+json") {
continue
}
try {
snippets.push(JSON.parse(script.textContent))
const snippet = JSON.parse(script.textContent)
snippet["@base"] = url
cache[url] = snippet
return JSON.stringify(snippet)
} catch (e) {
console.error(e)
}
}
return JSON.stringify(snippets)
return JSON.stringify({})
},
},
])