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Fix links in grabbed HTML

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fix #6
This commit is contained in:
Standa Lukeš 2020-09-28 21:07:59 +00:00
parent 5761a5ce0b
commit 9dc8ba5526
1 changed files with 37 additions and 3 deletions
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40
frontend/src/ksp-task-grabber.ts
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@ -13,6 +13,32 @@ type TaskLocation = {
startElement: string
}
function fixLink(link: string, currentPath: string): string {
const url = new URL(link, currentPath)
if (url.host == "ksp.mff.cuni.cz" || url.host == "ksp-test.ks.matfyz.cz") {
url.host = location.host
}
if (url.host == location.host) {
return url.pathname
} else {
return url.href
}
}
function fixAllLinks(e: any, currentPath: string) {
if (typeof e.src == "string") {
e.src = e.src
}
if (typeof e.href == "string") {
e.href = e.href
}
let c = (e as HTMLElement).firstElementChild
while (c) {
fixAllLinks(c, currentPath)
c = c.nextElementSibling
}
}
function getLocation(id: string, solution: boolean): TaskLocation | null {
const m = /^(\d+)-(Z?)(\d)-(\d)$/.exec(id)
if (!m) return null
@ -32,13 +58,19 @@ function getLocation(id: string, solution: boolean): TaskLocation | null {
}
}
function parseTask(startElementId: string, html: string): TaskAssignmentData {
function parseTask(startElementId: string, html: string, currentPath: string): TaskAssignmentData {
const parser = new DOMParser()
const doc = parser.parseFromString(html, "text/html")
if (!doc.head.querySelector("base")) {
let baseEl = doc.createElement('base');
baseEl.setAttribute('href', new URL(currentPath, location.href).href);
doc.head.append(baseEl);
}
const titleElement = doc.getElementById(startElementId)
if (!titleElement)
throw new Error(`Document does not contain ${startElementId}`)
fixAllLinks(titleElement, currentPath)
const elements = []
let e = titleElement
@ -66,8 +98,10 @@ function parseTask(startElementId: string, html: string): TaskAssignmentData {
}
let r = ""
for (const e of elements)
for (const e of elements) {
fixAllLinks(e, currentPath)
r += e.outerHTML + "\n"
}
return {
description: r,
id: id.trim(),
@ -83,7 +117,7 @@ async function loadTask({ url, startElement }: TaskLocation) {
throw Error("Bad request")
}
const rText = await r.text()
return parseTask(startElement, rText)
return parseTask(startElement, rText, url)
}
function virtualTask(id: string): TaskAssignmentData {