HTTP Request POST multipart file update throws 400 Bad request Required request part 'file' is not present

[Janek (Jan Kurowski)]

As in Summary I can’t properly configure HTTP Request Activity to attach file to POST request.
It works in Postman:

All I have added in Postman are: 2 params, token and a file.

In HTTP Request Activity in UiPath it doesn’t work. Neither by Attachments nor Body:
“----MultipartBoudary Content-Disposition: form-data; name=”“file”“; filename=”“filepath_with_name”" Content-Type: text/csv}----MultipartBoudary"
with header:
Content-Type: “multipart/form-data; boundary=----MultipartBoudary”

Thanks in advance

[Cristian_Negulescu]

Hello Jan,
In these videos you will see how I attached files in different system like ServiceNow and Jira:

Uipath upload files in Jira (REST API) (HTTP REQUEST) | Jira REST API upload file

ServiceNow Upload files without Administrator Rights with UiPath Robots | RPA files | REST API file

Thanks,
Cristian Negulescu

[Cristian_Negulescu]

Hello Jan,
In this video, I use multipart/form-data:

UiPath Http Request Upload file with Multipart form-data

0:20 cURL example
1:35 Send the command from POSTMAN
2:50 Implement the code in C#
4:20 Run the code
4:50 Visual Basic code VB.NET
6:20 New Process on UiPath Studio with Invoke Code
7:20 Imports Libraries in UiPath Studio
8:30 Run the Robot to Upload and Download the file

Blockquote
Dim client As HttpClient = New HttpClient()
client.BaseAddress = New Uri(“YOUR URL”)
client.DefaultRequestHeaders.Accept.Clear()
client.DefaultRequestHeaders.Accept.Add(New MediaTypeWithQualityHeaderValue(“application/vnd.openxmlformats-officedocument.wordprocessingml.document”))
// for BASIC AUTH
Dim byteArray As Byte() = Encoding.ASCII.GetBytes(“username:password”)
client.DefaultRequestHeaders.Authorization = New AuthenticationHeaderValue(“Basic”, Convert.ToBase64String(byteArray))Dim byteArray As Byte() = Encoding.ASCII.GetBytes(“username:password”)
// for OAUTH2
client.DefaultRequestHeaders.Add(“authorization”, “Bearer YOUR TOKEN”)
Dim request As MultipartFormDataContent = New MultipartFormDataContent()
request.Add(New StringContent(“tags”), “Bad”)
request.Add(New StringContent(“displayreferencetext”), “true”)
request.Add(New StringContent(“similaritythreshold”), “0.63”)
request.Add(New StreamContent(File.OpenRead(“C:\8A.docx”)), “file”, (New FileInfo(“C:\8A.docx”).Name))
Dim response As HttpResponseMessage = client.PostAsync(“”, request).Result
Dim strm As Stream = response.Content.ReadAsStreamAsync.Result
Dim doc As Byte()
Dim ms As MemoryStream = New MemoryStream()
strm.CopyTo(ms)
doc = ms.ToArray()
File.WriteAllBytes(“C:\rpa\FORDOWNLOAD\rez.docx”, doc)

Thanks,
Cristian Negulescu