Hi, I have a problem with uploading a file, it sea...

# ktor

[rudolf.hladik]

Hi, I have a problem with uploading a file, it seams like Ktor is not including key in request body. More info 🧵

[rudolf.hladik]

I have code like this

val formData = formData {
            append("file", data, headers)
        }
val multipart = MultiPartFormDataContent(formData)

val response = httpClient
            .post(url) {
                setBody(multipart)
            }

and it looks like this from logger

METHOD: HttpMethod(value=POST)
COMMON HEADERS
                                                                                                    -> Accept: application/json
                                                                                                    -> Accept-Charset: UTF-8                                                                                                   
                                                                                                    CONTENT HEADERS
                                                                                                    -> Content-Length: 7697
                                                                                                    -> Content-Type: multipart/form-data; boundary=78282c352c930955-90680557dab423d-6be60bfd-4b7e92bb-5b9073585afbc3f251c
                                                                                                    BODY Content-Type: multipart/form-data; boundary=78282c352c930955-90680557dab423d-6be60bfd-4b7e92bb-5b9073585afbc3f251c
                                                                                                    BODY START
                                                                                                    [request body omitted]
                                                                                                    BODY END

and I need to be like this in postman

[rudolf.hladik]

where the key file is present in request body

[rudolf.hladik]

the server returns error Required part 'file' is not present. which is exactly the same as if I omit the key in postman

[rudolf.hladik]

like this

[Aleksei Tirman [JB]]

Can you add the Content-Disposition header with the filename like in this example?

[rudolf.hladik]

i did with header Content-Disposition with "name=\"file\""

[rudolf.hladik]

let me try filename

[rudolf.hladik]

ive tried that but cant see the header in the request 🤔

REQUEST: https://...
                                                                                                    METHOD: HttpMethod(value=POST)
                                                                                                    COMMON HEADERS
                                                                                                    -> Accept: application/json
                                                                                                    -> Accept-Charset: UTF-8
                                                                                                                                                                                                                                                                                                 CONTENT HEADERS
                                                                                                    -> Content-Length: 7721
                                                                                                    -> Content-Type: multipart/form-data; boundary=-1ceef7fe259f1c04-56c9a7c81859744-56e52e78-ebfe80f-24b311ef-72e3f49547
                                                                                                    BODY Content-Type: multipart/form-data; boundary=-1ceef7fe259f1c04-56c9a7c81859744-56e52e78-ebfe80f-24b311ef-72e3f49547
                                                                                                    BODY START
                                                                                                    [request body omitted]
                                                                                                    BODY END

[rudolf.hladik]

basically i need to send this kind of request

curl -X POST "<http://localhost:8080/api/files/upload>" \
     -H "Content-Type: multipart/form-data" \
     -F "file=@/Users/username/Documents/myfile.txt"

but can't figure out how to include the key file

[rudolf.hladik]

Finally figured it out. It needed both Content-Disposition - name and filename and also content-type of the file

[Aleksei Tirman [JB]]

client.post("<http://localhost:8080/api/files/upload>") {
    setBody(MultiPartFormDataContent(
        formData {
            append("file", File("/Users/username/Documents/myfile.txt").readBytes(), Headers.build {
                append(HttpHeaders.ContentType, "text/plain")
                append(HttpHeaders.ContentDisposition, "filename=\"myfile.txt\"")
            })
        }
    ))
}

[rudolf.hladik]

thx, yep the Content-type was crucial part that was missing in my previous code