Just learning SwiftUI as a hobby and could use some help with Task/Await/Async. I am creating an app that scrapes a webpage. I imagine I want to have my webpage fetching func be async. Done. Then in ContentView I am calling that func (inside a Do/Catch) to return a String "webpageContent". But then I get the error "Cannot find 'webpageContent' in scope" when I try to use that String. That error goes away when I take the fetching call out of Do/Catch, but then I get two errors on the fetching call: "'async' call in a function that does not support concurrency" and "Errors thrown from here are not handled". Help please!

Here's the relevant code:

struct ContentView: View {
    @State private var url: String = "https://baseball5.onroto.com/baseball/webnew/display_live_scoring.pl?Rotorooters+4&session_id=4ouuH2UfoQR5tT9LSMos4ZC0zNIn&which_team=4"

    var body: some View {
        do {
            let webpageContent = try await fetchWebPageContent(from: url)
        } catch {
            fatalError()
        }

        let scrapedContent = docScrape(from: webpageContent)

lots of code then:

               }
                .padding()
                .navigationTitle("Live Stats for My Team")
                .navigationBarTitleDisplayMode(.inline)
                .task {
                    await fetchWebPageContent(from: url)
                }

And the fetching func:

func fetchWebPageContent(from urlString: String) async throws -> String {
    guard let url = URL(string: urlString) else {
        throw URLError(.badURL)
    }

    let (data, response) = try await URLSession.shared.data(from: url)

    guard let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode == 200 else {
        throw URLError(.badServerResponse)
    }

    guard let webpageContent = String(data: data, encoding: .utf8) else {
        throw URLError(.cannotParseResponse)
    }
    print(webpageContent)
    return webpageContent
}

Hi! You may want to use similar to this approach depending on what you are going to do with your response. I just used Text() to make sure it is recevied as string...

struct ContentView: View {
    @State private var url: String = "https://baseball5.onroto.com/baseball/webnew/display_live_scoring.pl?Rotorooters+4&session_id=4ouuH2UfoQR5tT9LSMos4ZC0zNIn&which_team=4"

    @State private var webConent: String = ""

    var body: some View {
        Text(webConent)
        .task {
            do {
                webConent = try await fetchWebPageContent(from: url)
            } catch {
                print(error)
            }
        }
    }
}

func fetchWebPageContent(from urlString: String) async throws -> String {
    guard let url = URL(string: urlString) else {
        throw URLError(.badURL)
    }

    let (data, response) = try await URLSession.shared.data(from: url)

    guard let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode == 200 else {
        throw URLError(.badServerResponse)
    }

    guard let webpageContent = String(data: data, encoding: .utf8) else {
        throw URLError(.cannotParseResponse)
    }
    print(webpageContent)
    return webpageContent
}