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Xiaoyu Zhang
Xiaoyu Zhang
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Edited:

i used System.Text.Encoding.UTF8.GetString(//byte array) to convert byte array to string and write to file. will this raise any concern of changing the original file content? Thank you.

public async Task<string> GetReferenceFile(ReferenceFileRequest referenceFileRequest)
    {
        ConfigurationManager.RefreshSection("appSettings");
        var URL = ConfigurationManager.AppSettings["GetReferenceFile"];
        byte[] refFile = new byte[0];
        try
        {
            Client.DefaultRequestHeaders.Accept.Clear();
            Client.DefaultRequestHeaders.Accept.Add(
                new MediaTypeWithQualityHeaderValue("application/json"));
            HttpResponseMessage response = await Client.PostAsJsonAsync(URL, referenceFileRequest);
            
            refFile = await response.Content.ReadAsByteArrayAsync();
            return System.Text.Encoding.UTF8.GetString(refFile); //Convert to string
        }
        catch (Exception ex)
        {
            logData.LogError("Error Message: " + ex.Message + " Stack Trace: " + ex.StackTrace);
            return null;
        }
    }

Edited:

i used System.Text.Encoding.UTF8.GetString(//byte array) to convert byte array to string and write to file. will this raise any concern of changing the original file content? Thank you.

public async Task<string> GetReferenceFile(ReferenceFileRequest referenceFileRequest)
    {
        ConfigurationManager.RefreshSection("appSettings");
        var URL = ConfigurationManager.AppSettings["GetReferenceFile"];
        byte[] refFile = new byte[0];
        try
        {
            Client.DefaultRequestHeaders.Accept.Clear();
            Client.DefaultRequestHeaders.Accept.Add(
                new MediaTypeWithQualityHeaderValue("application/json"));
            HttpResponseMessage response = await Client.PostAsJsonAsync(URL, referenceFileRequest);
            
            refFile = await response.Content.ReadAsByteArrayAsync();
            return System.Text.Encoding.UTF8.GetString(refFile); //Convert to string
        }
        catch (Exception ex)
        {
            logData.LogError("Error Message: " + ex.Message + " Stack Trace: " + ex.StackTrace);
            return null;
        }
    }
Source Link
Xiaoyu Zhang
Xiaoyu Zhang
  • 11
  • 1
  • 2

c# web api return with whole file instead of byte array

for my current web api, i return a file as byte[] and it works via the code follows.

[Route("GetReferenceFile")]
    [HttpPost]
    public HttpResponseMessage GetReferenceFile([FromBody]ReferenceFileMonitorRetrievingRequest request)
    {
        try
        {
            var fileName = request.fileName;
            //get file path
            var filePathWoFileName = _manager.GetReferenceFileForReferenceFileMonitor(request.fileName, request.fileFolderPathWithFileName);
            //convert file into bytes array
            var dataBytes = File.ReadAllBytes(filePathWoFileName + request.fileName);
            //add bytes to memory stream 
            var dataStream = new MemoryStream(dataBytes);
            //send out
            HttpResponseMessage httpResponseMessage = Request.CreateResponse(HttpStatusCode.OK);
            httpResponseMessage.Content = new StreamContent(dataStream);
            httpResponseMessage.Content.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("attachment");
            httpResponseMessage.Content.Headers.ContentDisposition.FileName = fileName;
            httpResponseMessage.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/octet-stream");

            return httpResponseMessage;
        }
        catch (IOException e)
        {
            logger.Error("Error Message: " + e.Message + " Stack Trace: " + e.StackTrace);
            return Request.CreateResponse(HttpStatusCode.InternalServerError, e);
        }
        catch (Exception ex)
        {
            logger.Error("Error Message: " + ex.Message + " Stack Trace: " + ex.StackTrace);
            return Request.CreateResponse(HttpStatusCode.InternalServerError, ex);
        }

may i ask that is there any other way to send the whole file over instead of read the file as byte[] and send over? because i was afraid that reading as byte[] may change the file a bit, for example: the space made by "Tab" may not remain the same.

Thank you in advance.