Hello I’m trying to send a multipart request, the...

# ktor

[Reham Galal]

Hello
I’m trying to send a multipart request, the problem is whatever is sent in the body it appears empty body
Here’s my code

HttpClient.submitFormWithBinaryData(
url= url,
formData = formData {
append(“store_image_profile”, data, Headers.build {
append(HttpHeaders.ContentType, “ multipart/form-data”)
append(HttpHeaders.ContentDisposition, “ form-data”)
})
}
)

Any thoughts?

[Arjan van Wieringen]

Why is the contentType multipart/form-data? Besides the obvious space issues between the quotes. The submitFormWithBinaryData already takes care of your multipart contentType

In the docs it shows you need to pass the content-type of your file:

val response: HttpResponse = client.submitFormWithBinaryData(
    url = "<http://localhost:8080/upload>",
    formData = formData {
        append("description", "Ktor logo")
        append("image", File("ktor_logo.png").readBytes(), Headers.build {
            append(HttpHeaders.ContentType, "image/png")
            append(HttpHeaders.ContentDisposition, "filename=\"ktor_logo.png\"")
        })
    }
)

[Reham Galal]

I tried your solution but still the body is empty

[Arjan van Wieringen]

How do you consume the body?

[Reham Galal]

I didn’t get you what do you mean by consume ?!

[Reham Galal]

You mean in the ktor client object it self? Does it requires a specific configuration?

[Arjan van Wieringen]

How do you validate that the body is empty?

[Reham Galal]

From chucker apis log

[Reham Galal]

And the response says it can’t find the parameter

[Aleksei Tirman [JB]]

Can you try to make the request to https://httpbin.org/post to check if the response actually contains the required form fields?

[Reham Galal]

Okay one minute

[Reham Galal]

I just tried how to know what have been sent

[Reham Galal]

I tried https://httpbin.org/post and it shows the body is still empty, even if I tried to send a mock bytearray

[Reham Galal]

URL: https://httpbin.org/post
Method: POST
Protocol: h2
Status: Complete
Response: 200
SSL: Yes

Request time: Mon Oct 21 124732 GMT+02:00 2024
Response time: Mon Oct 21 124732 GMT+02:00 2024
Duration: 223 ms

Request size: 278 B
Response size: 615 B
Total size: 893 B

---------- Request ----------

Authorization:
Accept: application/json
Accept-Charset: UTF-8
User-Agent: Ktor client
Content-Type: multipart/form-data; boundary=507968bb5ca74072-5377b56f3ce6c706-769d93dd-3eff87cb-6275d053a9e4d9d-7d

(body is empty)

---------- Response ----------

date: Mon, 21 Oct 2024 104733 GMT
content-type: application/json
content-length: 615
server: gunicorn/19.9.0
access-control-allow-origin: *
access-control-allow-credentials: true

{
"args": {},
"data": "",
"files": {
"store_img_profile": "\u0000"
},
"form": {},
"headers": {
"Accept": "application/json",
"Accept-Charset": "UTF-8",
"Accept-Encoding": "gzip",
"Authorization": "",
"Content-Length": "278",
"Content-Type": "multipart/form-data; boundary=507968bb5ca74072-5377b56f3ce6c706-769d93dd-3eff87cb-6275d053a9e4d9d-7d",
"Host": "httpbin.org",
"User-Agent": "Ktor client",
"X-Amzn-Trace-Id": "Root=1-67163145-492535c90fc0f46e741c1a9d"
},
"json": null,
"origin": "156.174.41.214",
"url": "https://httpbin.org/post"
}

[Reham Galal]

the code is here

submitFormWithBinaryData(
    url = "",
    formData = formData {
            append("store_img_profile", body, Headers.build {
                append(HttpHeaders.ContentType, "image/png")
                append(HttpHeaders.ContentDisposition, "filename=\"image_file\"")
            })
    }
)

[Aleksei Tirman [JB]]

The body isn't empty, and it contains the store_img_profile multipart form field.

[Reham Galal]

But the body is empty

[Mofe Ejegi]

I believe she’s referring to the Request body being empty.

It could also be as a result of the log library you’re using.

[Mofe Ejegi]

Yeah, it’s as a result of the log library. Ktor is sending the image byteArray but it’s omitted from the logs. So your log library is just interpreting it as an empty body

[Reham Galal]

Thank you @Mofe Ejegi