public fun mergeHeaders()

in ktor-client/ktor-client-core/common/src/io/ktor/client/engine/Utils.kt [24:50]

• 22 lines of code
• 6 McCabe index (conditional complexity)

public fun mergeHeaders(
    requestHeaders: Headers,
    content: OutgoingContent,
    block: (key: String, value: String) -> Unit
) {
    buildHeaders {
        appendAll(requestHeaders)
        appendAll(content.headers)
    }.forEach { key, values ->
        if (HttpHeaders.ContentLength == key) return@forEach // set later
        if (HttpHeaders.ContentType == key) return@forEach // set later

        // https://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2
        block(key, values.joinToString(","))
    }

    val missingAgent = requestHeaders[HttpHeaders.UserAgent] == null && content.headers[HttpHeaders.UserAgent] == null
    if (missingAgent && needUserAgent()) {
        block(HttpHeaders.UserAgent, KTOR_DEFAULT_USER_AGENT)
    }

    val type = content.contentType?.toString() ?: content.headers[HttpHeaders.ContentType]
    val length = content.contentLength?.toString() ?: content.headers[HttpHeaders.ContentLength]

    type?.let { block(HttpHeaders.ContentType, it) }
    length?.let { block(HttpHeaders.ContentLength, it) }
}