Ktor: ContentType for HttpClient request

[coolemza]

how to setup contentType for HttpClient request?

    val client = HttpClient(OkHttp) {
        engine {
            defaultRequest {
                contentType(ContentType.Application.FormUrlEncoded)
            }
        }
    }

this code throws exception:
io.ktor.http.UnsafeHeaderException: Header Content-Type is controlled by the engine and cannot be set explicitly

[e5l]

Hi, @coolemza. Thanks for the report.
You could set up it in OutgoingContent

[gaydenko]

@e5l Please, provide an example of content type setting for particular request (rather client).

[gaydenko]

That is this fragment does work with 0.9.3, but not with > 0.9.3:

            val response = client.call(url) {
                contentType(ContentType.Application.Json)
                method = HttpMethod.Post
                body = json.writeValueAsString(userData)
            }.response

[e5l]

Sure :)

val response = client.call(url) {
   method = HttpMethod.Post
   body = TextContent(json.writeValueAsString(userData), contentType = ContentType.Application.Json)
}.response

[e5l]

@soywiz could we have a sample for the case?

[coolemza]

is it possible to set default content type for engine?

[e5l]

Yep. You could intercept send pipeline and wrap the body into outgoing content with selected ContentType field.

[e5l]

I think the problem is obsolete for now. Closed

[gsavvid]

@e5l What if you don't want to specify a Content-Type? There's this scenario with direct uploads to Google Cloud Storage Buckets where adding a Content-Type header results in a signature mismatch. Here's more info about this.

The following also fails because it sets Content-Type: null:

client.put<String> {
    url(url)
    body = ByteArrayContent(byteArray, contentType = null)
}