Uploaded file has 0 bytes - REST API C#

Hello. I've been looking into the CS 10.5 WS using C#. I began using Postman to get a feel for the API's. I'm able to authenticate and get and create nodes just fine. The problem I'm having is with uploading a file in C#. In Postman, I'm able to upload a file without an issue. I"ve copied the RESTSHARP code as suggested by Postman and updated the parameters to fit the dynamic file being loaded. The file appears in my node (folder) but there are no contents. It shows 0 Kb. Right now i'm only working with Excel files so the content-type is hard coded.

The response I receive is :

StatusCode: OK, Content-Type: application/json; charset=UTF-8, Content-Length: 13)

Here is the code i'm using.

server is the path (http://usrd12z4t1009/)
EXE is OTCS/cs.exe/
Ticket is my authentication ticket

            RestClient client = new RestClient(String.Format("{0}{1}api/v1/nodes", server, EXE));            RestRequest request = new RestRequest(Method.POST);            request.AddHeader("Postman-Token", "08a94d81-b303-43ed-b7c2-ad58e64a43c1");            request.AddHeader("cache-control", "no-cache");            request.AddHeader("Content-Type", "multipart/form-data");            request.AddHeader("otcsticket", ticket);            request.AddHeader("content-type", "multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW");            request.AddParameter("multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW",              String.Format("------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=\"type\"\r\n\r\n{0}\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=\"parent_id\"\r\n\r\n{1}\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=\"file\"; filename=\"{2}\"\r\nContent-Type: {5}\r\n\r\n\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n{3}\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=\"description\"\r\n\r\n{4}\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW--", type, parent_id, file, name, description, @application/vnd.openxmlformats-officedocument.spreadsheetml.sheet),                ParameterType.RequestBody);            var response = client.Execute(request);

Thank you for any help

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Comments

AKropp

Hi David,

Not seeing a spot in your code snippet where the file is actually being added from the local file system. Quick peek at RestRequest info suggests that all you probably need is a request.AddFile(whateverargs). Not super familiar with RestSharp but there’s some usage examples that seem good over here: https://csharp.hotexamples.com/examples/RestSharp/RestRequest/AddFile/php-restrequest-addfile-method-examples.html

Hope that helps!

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Subject: Uploaded file has 0 bytes - REST API C#

Uploaded file has 0 bytes - REST API C#

Posted bydzangger@huber.com (Zangger, David) On 11/12/2018 12:36 PM

The response I receive is :

StatusCode: OK, Content-Type: application/json; charset=UTF-8, Content-Length: 13)

Here is the code i'm using.

server is the path (http://usrd12z4t1009/)
EXE is OTCS/cs.exe/
Ticket is my authentication ticket

            RestClient client = new RestClient(String.Format("{0}{1}api/v1/nodes", server, EXE));

            RestRequest request = new RestRequest(Method.POST);

            request.AddHeader("Postman-Token", "08a94d81-b303-43ed-b7c2-ad58e64a43c1");

            request.AddHeader("cache-control", "no-cache");

            request.AddHeader("Content-Type", "multipart/form-data");

            request.AddHeader("otcsticket", ticket);

            request.AddHeader("content-type", "multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW");

            request.AddParameter("multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW",

             String.Format("------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=\"type\"\r\n\r\n{0}\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=\"parent_id\"\r\n\r\n{1}\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=\"file\"; filename=\"{2}\"\r\nContent-Type: {5}\r\n\r\n\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n{3}\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=\"description\"\r\n\r\n{4}\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW--", type, parent_id, file, name, description, @application/vnd.openxmlformats-officedocument.spreadsheetml.sheet),

                ParameterType.RequestBody);

            var response = client.Execute(request);

Thank you for any help

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David Zangger

Thank you Alex. I was missing the file attachment itself. That part wasn't very clear in Postman. I was able to come up with the following that does work!

RestClient client = CreateRestClient("api/v1/nodes");
RestRequest request = new RestRequest(Method.POST);

request.AddHeader("otcsticket", ticket);
request.AddParameter("type", type);
request.AddParameter("parent_id", parent_id);
request.AddParameter("name", Path.GetFileName(file));
request.AddParameter("description", description);

// Determine the MIME type of the file being uploaded
var mime = new Mime();

// Add HTTP Headers
request.AddHeader("Content-Type", "multipart/form-data");
request.AddFile("file", file, mime.Lookup(file));

var response = client.Execute<OTId>(request);

return response.Data.id;