CODEWITHSUNDEEP
azurerestazure-data-lake
dev
dev

Reputation: 195

issue with update file in azure data lake store using rest api

i'm trying to get data from local file and add data into one of the file into adls(azure data lake store) i'm following the below URL. click here

how can i pass parameters and body to the api using c# because so many headers don't have any value

below code i tried to execute but no success.

HttpClient httpClient = new HttpClient();
        {
            String storageAccountUrl = "https://XXXXXXXXXX.dfs.core.windows.net/XXXXX/test.txt?action=flush&position=0&retainUncommittedData=false&close=true";
            httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", authenticationToken);
            var httpResponseMessage = await httpClient.PutAsync(storageAccountUrl, new StringContent("test"));
            string resp = await httpResponseMessage.Content.ReadAsStringAsync();

        }

how should i pass other headers and is it the right way to pass body.

Upvotes: 1

Views: 649

Answers (2)

Ivan Glasenberg
Ivan Glasenberg

Reputation: 30025

The code below is working fine if update a empty file:

        static void Main(string[] args)
        {
            var auth = new AzureServiceTokenProvider();          

            const string url = "https://storage.azure.com/";
            string token = auth.GetAccessTokenAsync(url).Result;
            string requestUri = "https://xxx.dfs.core.windows.net/t11/c.txt?action=append&position=0";
            var method = new HttpMethod("PATCH");

            string upload_string = "have a nice day!";

            var request = new HttpRequestMessage(method, requestUri)
            {
                Content = new StringContent(upload_string)
            };

            // Add some defined headers
            request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", token);
            request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("text/plain"));
            var i = request.Content.AsString().Length;
            Console.WriteLine(request.Content.AsString());

            var httpClient = new HttpClient();
            var result = httpClient.SendAsync(request).Result;

            Console.WriteLine("append result status code: "+ (int)result.StatusCode);

            //for flush    
            string requestUri_2 = "https://xxx.dfs.core.windows.net/t11/c.txt?action=flush&position="+upload_string.Length;

            var request_2 = new HttpRequestMessage(method,requestUri_2);

            using (HttpClient httpClient_2 = new HttpClient())
            {
                httpClient_2.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
                HttpResponseMessage response = httpClient_2.SendAsync(request_2).Result;
                Console.WriteLine("flush result status code: " + (int)response.StatusCode);
            }

          Console.ReadLine();
        }

Upvotes: 1

Jack Jia
Jack Jia

Reputation: 5549

Based on the documentation, some headers are just optional which means that you do not need to set them in the headers. You only need to set the required headers.

Update:

For how to use Httpclient to send a patch request in C#, you may get a lot of samples and documentations on the internet. Here is just a sample:

static void Main(string[] args)
{
    string requestUri = "the uri, https://.....";
    var method = new HttpMethod("PATCH");

    var request = new HttpRequestMessage(method, requestUri)
    {
        Content = new StringContent("Test string")
    };

    // Add some defined headers
    request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "Your Oauth token");
    request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

    // Add some other headers or custom headers
    request.Headers.TryAddWithoutValidation("custome_header", "value");

    var hc = new HttpClient();
    var result = hc.SendAsync(request).Result;

    Console.WriteLine(result);

    Console.ReadLine();
}

Upvotes: 1

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