Problem: I have a Java spring rest service to upload a file (large size). I want use a .NET httpClient (or other .net client) to call upload service.
Questions:
Thank you!
This is the answer: I can send a file with multipart attachment from c# client to Java JAX Rest Webservice.
try
{
using (
var client = new HttpClient())
using (var form = new MultipartFormDataContent())
{
using (var stream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) {
using (var fileContent = new StreamContent(stream)) {
fileContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") {FileName = fileName, DispositionType = DispositionTypeNames.Attachment, Name = "fileData"};
form.Add(fileContent);
// only for test purposes, for stable environment, use ApiRequest class.
response = client.PostAsync(url, form).Result;
}
}
}
return response.RequestMessage != null ? response.ReasonPhrase : null;
}
catch (Exception ex)
{
TraceManager.TraceError("Post Asyn Request to " + url + " \n" + ex.Message, ex);
throw;
}
HTTP is a standard that is independent of OS platforms and programming languages, so you shouldn't have any problems with interoperability in case your .net client complies with the standards.
java spring boot
@RequestMapping(value="/upload", method=RequestMethod.POST)
public @ResponseBody String upload(@RequestParam("FileParam") MultipartFile file){
InputStream fromClient=file.getInputStream();
...do stuff with the database/ process the input file...
c#
HttpClient client = new HttpClient();
MultipartFormDataContent form = new MultipartFormDataContent();
FileInfo file = new FileInfo(@"<file path>");
form.Add(new StreamContent(file.OpenRead()),"FileParam",file.Name);
HttpResponseMessage response = await client.PostAsync("http://<host>:<port>/upload", form);
Console.WriteLine(response.StatusCode);
Console.WriteLine(response.ReasonPhrase);
Console.WriteLine(response.ToString());
Console.WriteLine(Encoding.ASCII.GetString(await response.Content.ReadAsByteArrayAsync()));
