C#•9mo ago

✅ HttpClient Get Page Content

I need a method RequestHelper.GetContent(string url) that returns the url's html as string. I also need a method that can get the page content as binary, so i can download files.

15 Replies

Sound•9mo ago

public static async Task<string> GetContentAsync(string url)
        {
            try
            {
                HttpResponseMessage response = await httpClient.GetAsync(url);
                response.EnsureSuccessStatusCode();
                if(response.StatusCode != HttpStatusCode.OK)
                {
                    throw new HttpRequestException($"Error while fetching content from {url}");
                }

                return response.Content.ToString();
            }
            catch (HttpRequestException ex)
            {
                throw new HttpRequestException($"Error while fetching content from {url}: {ex.Message}");
            }
        }

public static async Task<string> GetContentAsync(string url)
        {
            try
            {
                HttpResponseMessage response = await httpClient.GetAsync(url);
                response.EnsureSuccessStatusCode();
                if(response.StatusCode != HttpStatusCode.OK)
                {
                    throw new HttpRequestException($"Error while fetching content from {url}");
                }

                return response.Content.ToString();
            }
            catch (HttpRequestException ex)
            {
                throw new HttpRequestException($"Error while fetching content from {url}: {ex.Message}");
            }
        }

this is my code so far. the problem is that the whole app freezes when i call GetContentAsync

mtreit•9mo ago

As in, it's a UI application and the UI thread freezes? How are you calling the method?

Sound•9mo ago

        public static string GetContent(string url)
        {
            try
            {
                return GetContentAsync(url).Result;
            }
            catch (AggregateException ex)
            {
                throw ex.InnerException ?? ex;
            }
        }

        public static string GetContent(string url)
        {
            try
            {
                return GetContentAsync(url).Result;
            }
            catch (AggregateException ex)
            {
                throw ex.InnerException ?? ex;
            }
        }

        private void UpdateConfiguration()
        {
            string contentProjects = RequestHelper.GetContent("https://api.papermc.io/v2/projects");
            ProjectsRecord projects = new();
            projects = JsonSerializer.Deserialize<ProjectsRecord>(contentProjects);
            comboBoxProject.Items.Clear();
            comboBoxProject.Items.AddRange(projects.projects.ToArray());
            if (comboBoxProject.Text == "")
            {
                comboBoxProject.Text = comboBoxProject.Items[0].ToString();
            }
        }

        private void UpdateConfiguration()
        {
            string contentProjects = RequestHelper.GetContent("https://api.papermc.io/v2/projects");
            ProjectsRecord projects = new();
            projects = JsonSerializer.Deserialize<ProjectsRecord>(contentProjects);
            comboBoxProject.Items.Clear();
            comboBoxProject.Items.AddRange(projects.projects.ToArray());
            if (comboBoxProject.Text == "")
            {
                comboBoxProject.Text = comboBoxProject.Items[0].ToString();
            }
        }

        private void MainWindow_Load(object sender, EventArgs e)
        {
            UpdateConfiguration();
        }

        private void MainWindow_Load(object sender, EventArgs e)
        {
            UpdateConfiguration();
        }

mtreit•9mo ago

.Result There's your problem

Angius•9mo ago

Anything but await is blocking

mtreit•9mo ago

You need to make it async and use await, yeah.

mtreit•9mo ago

https://learn.microsoft.com/en-us/dotnet/csharp/asynchronous-programming/async-scenarios

Asynchronous programming - C#

Learn about the C# language-level asynchronous programming model provided by .NET Core.

Sound•9mo ago

everything is sync

Angius•9mo ago

very sync much wow

Sound•9mo ago

do i have to make everything async?

Angius•9mo ago

Yes

Sound•9mo ago

How can i convert getcontentasync to be sync ?

Angius•9mo ago

If it's async, you need to await it If you await in a method, it needs to be async You don't

mtreit•9mo ago

You should probably make things async. That said, if you want to make a synchronous call you can use the Send method: https://learn.microsoft.com/en-us/dotnet/api/system.net.http.httpclient.send?view=net-7.0

Sound•9mo ago

thanks

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✅ HttpClient Get Page Content