Added Response constructor overload

Author: ArnyminerZ

src/main/kotlin/at/bitfire/dav4jvm/exception/DavException.kt

@@ -76,8 +76,21 @@ open class DavException @JvmOverloads constructor(
     var errors: List<Error> = listOf()
         private set
 
+    /**
+     * Initializes the [DavException] and populates [request], [requestBody], [response], [responseBody] and [errors] with the contents of [httpResponse].
+     *
+     * The whole response body may be loaded, so this function should be called in blocking-sensitive contexts.
+     */
+    constructor(message: String, httpResponse: Response?, ex: Throwable? = null): this(message, ex) {
+        populateHttpResponse(httpResponse)
+    }
 
-    fun populateHttpResponse(httpResponse: Response?): DavException {
+    /**
+     * Fills [request], [requestBody], [response], [responseBody] and [errors] according to the given [httpResponse].
+     *
+     * The whole response body may be loaded, so this function should be called in blocking-sensitive contexts.
+     */
+    private fun populateHttpResponse(httpResponse: Response?): DavException {
         if (httpResponse != null) {
             response = httpResponse.toString()
 

src/main/kotlin/at/bitfire/dav4jvm/exception/HttpException.kt

@@ -20,10 +20,10 @@ open class HttpException: DavException {
     var code: Int
 
     constructor(response: Response): super(
-            "HTTP ${response.code} ${response.message}"
+        "HTTP ${response.code} ${response.message}",
+        httpResponse = response
     ) {
         code = response.code
-        populateHttpResponse(response)
     }
 
     constructor(code: Int, message: String?): super("HTTP $code $message") {