cf worker for giesela.blog

cfworker-gieselablog.js

addEventListener('fetch', event => {
    event.respondWith(createResponse(event.request))
})

async function createResponse(req) {
    let domain = new URL(req.url).hostname.toString();
    if (domain !== 'giesela.blog') {
        let redirectHeaders = new Headers()
        redirectHeaders.set('Location', 'https://giesela.blog')
        return new Response('', {
            status: 301,
            headers: redirectHeaders
        })
    }

    let url = new URL(req.url).toString().replace("giesela.blog", "giesela.ghost.io")
    const init = {
        body: req.body,
        headers: req.headers,
        method: req.method
    }

    let response = await fetch(url, init)
    let newHdrs = new Headers(response.headers)

    if (newHdrs.has("Content-Type") && !newHdrs.get("Content-Type").includes("text/html") && !newHdrs.get("Content-Type").includes("text/xml")) {
        return new Response(response.body, {
            status: response.status,
            statusText: response.statusText,
            headers: newHdrs
        })
    }

    let text = await response.text()
    let modified = text.replace('<script>"giesela.ghost.io"==window.location.hostname&&(window.location.href="https://giesela.blog"+window.location.pathname);</script>', '')
    modified = modified.replace(/giesela.ghost.io/g, 'giesela.blog')

    let urlPath = new URL(req.url).pathname
    if (urlPath === '/ghost' || urlPath === '/ghost/') {
        let redirectHeaders = new Headers()
        redirectHeaders.set('location', 'https://giesela.ghost.io/ghost/')
        return new Response(modified, {
            status: 302,
            headers: newHdrs
        })
    }

    let originPath = new URL(response.url).pathname
    if (originPath !== urlPath) {
        let redirectHeaders = new Headers()
        redirectHeaders.set('Location', 'https://giesela.blog' + originPath)
        return new Response('', {
            status: 301,
            headers: redirectHeaders
        })
    }

    return new Response(modified, {
        status: response.status,
        statusText: response.statusText,
        headers: newHdrs
    })
}