Issue with Updating file in ADLS Gen2 using Rest-API - azure

Question

I'm using ADLS Gen2 using rest api Path-Update i'm trying to update data into already created created blank file into ADLS.
but whenever i'm trying to use the API i'm getting below response from API.
{StatusCode: 202, ReasonPhrase: 'Accepted'}
but still the file will be empty.
string requestUri = "https://XXXXXXX.dfs.core.windows.net/XXXXX/abc.txt?action=append&position=0";// &retainUncommittedData=false&close=true";
dynamic method = new HttpMethod("PATCH");
dynamic request = new HttpRequestMessage(method, requestUri)
{
Content = new StringContent("\"requestBody\":\"test\"")
};`enter code here`
// Add some defined headers
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", authenticationToken);
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/octet-stream"));
// Add some other headers or custom headers
request.Headers.TryAddWithoutValidation("Content-Length", "0");
dynamic httpClient = new HttpClient();
dynamic result = httpClient.SendAsync(request).Result;
i expect the data should be updated in file but now i'm getting 202 Accepted as a response code but file is not updated with data
also i tried append with flush operation below is the code i'm getting 405 error
string requestUri = "https://XXXXXX.dfs.core.windows.net/XXXXX/abc.txt?action=append&position=0";// &retainUncommittedData=false&close=true";
var method = new HttpMethod("PATCH");
var request = new HttpRequestMessage(method, requestUri)
{
Content = new StringContent("\"requestBody\":\"test\"")
};
// Add some defined headers
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", authenticationToken);
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("text/plain"));
// Add some other headers or custom headers
// request.Headers.TryAddWithoutValidation("Content-Length", "0");
var httpClient = new HttpClient();
var result = httpClient.SendAsync(request).Result;
string requestUri1 = "https://XXXXX.dfs.core.windows.net/XXXXXX/abc.txt?action=flush&position=0";//&retainUncommittedData=false&close=true";
using (HttpClient httpClient1 = new HttpClient())
{
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", authenticationToken);
HttpResponseMessage response = (httpClient.PutAsync(requestUri1, null)).Result;
}

Answer 1

Update:
If the files in adls gen2 is empty, you can use the method below:
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();
}
Test result as below, and I also check in azure, the data is flushed into the file.
Once you have received the 202 Accepted you can then call the action=flush and pass the position that you want the data to be flushed to. like below:
https://$STORAGE_ACCOUNT_NAME.dfs.core.windows.net/mydata/data/file1?action=flush&position=10