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Attempts to scrape more data

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This commit is contained in:
Pieter Vander Vennet 2024-04-24 00:58:22 +02:00
parent 5bebcf3825
commit 73db05f545
2 changed files with 54 additions and 14 deletions
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2
scripts/ScriptUtils.ts
View file

@ -176,7 +176,9 @@ export default class ScriptUtils {
const requestPromise = new Promise((resolve, reject) => {
try {
headers = headers ?? {}
if(!headers.Accept){
headers.accept ??= "application/json"
}
console.log(" > ScriptUtils.Download(", url, ")")
const urlObj = new URL(url)
const request = https.get(

64
scripts/serverLdScrape.ts
View file

@ -8,6 +8,50 @@ class ServerLdScrape extends Script {
super("Starts a server which fetches a webpage and returns embedded LD+JSON")
}
private static async attemptDownload(url: string) {
const host = new URL(url).host
const headers = [
{
"User-Agent":
"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.52 Safari/537.36",
"accept": "application/html"
},
{
"User-Agent": "MapComplete/openstreetmap scraper; pietervdvn@posteo.net; https://github.com/pietervdvn/MapComplete",
"accept": "application/html"
},
{
Host: host,
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; rv:122.0) Gecko/20100101 Firefox/122.0",
"Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8",
"Accept-Language": "en-US,en;q=0.5",
"Accept-Encoding": "gzip, deflate, br",
"Alt-Used": host,
DNT: 1,
"Sec-GPC": 1,
"Upgrade-Insecure-Requests": 1,
"Sec-Fetch-Dest": "document",
"Sec-Fetch-Mode": "navigate",
"Sec-Fetch-Site": "cross-site",
"Sec-Fetch-User":"?1",
"TE": "trailers",
Connection: "keep-alive"
}
]
for (let i = 0; i < headers.length; i++) {
try {
return await ScriptUtils.Download(
url,
headers[i],
10
)
} catch (e) {
console.error("Could not download", url, "with headers", headers[i])
}
}
}
async main(args: string[]): Promise<void> {
const port = Number(args[0] ?? 2346)
const cache: Record<string, { date: Date; contents: any }> = {}
@ -16,7 +60,7 @@ class ServerLdScrape extends Script {
mustMatch: "extractgraph",
mimetype: "application/ld+json",
addHeaders: {
"Cache-control": "max-age=3600, public",
"Cache-control": "max-age=3600, public"
},
async handle(content, searchParams: URLSearchParams) {
const url = searchParams.get("url")
@ -31,19 +75,13 @@ class ServerLdScrape extends Script {
}
}
let dloaded: { content: string } | { redirect: string } | "timeout" = {
redirect: url,
redirect: url
}
do {
dloaded = await ScriptUtils.Download(
dloaded["redirect"],
{
"User-Agent":
"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.52 Safari/537.36", // MapComplete/openstreetmap scraper; pietervdvn@posteo.net; https://github.com/pietervdvn/MapComplete",
},
10
)
dloaded = await ServerLdScrape.attemptDownload(dloaded["redirect"])
if (dloaded === "timeout") {
return '{"#":"timout reached"}'
return "{\"#\":\"timout reached\"}"
}
} while (dloaded["redirect"])
@ -72,8 +110,8 @@ class ServerLdScrape extends Script {
console.error(e)
}
}
},
},
}
}
])
}
}