Implement raiseForStatus (#8)

* add raiseForStatus

* pretty

* bump version

src/yahttp.nim

@@ -1,6 +1,7 @@
 import base64, httpclient, net, json, uri, strutils, tables
 
 import yahttp/internal/utils
+import yahttp/exceptions
 
 type
   ## Types without methods
@@ -39,13 +40,15 @@ type
     request*: Request
 
 proc toResp(response: httpclient.Response, requestUrl: string,
-    requestHeaders: seq[tuple[key: string, val: string]], requestHttpMethod: Method): Response =
+    requestHeaders: seq[tuple[key: string, val: string]],
+        requestHttpMethod: Method): Response =
   ## Converts httpclient.Response to yahttp.Response
   return Response(
     status: parseInt(response.status.strip()[0..2]),
     headers: response.headers.table,
     body: response.body,
-    request: Request(url: requestUrl, headers: requestHeaders, httpMethod: requestHttpMethod)
+    request: Request(url: requestUrl, headers: requestHeaders,
+        httpMethod: requestHttpMethod)
   )
 
 proc json*(response: Response): JsonNode =
@@ -60,6 +63,11 @@ proc ok*(response: Response): bool =
   ## Is HTTP status in OK range (> 0 and < 400)?
   return response.status > 0 and response.status < 400
 
+proc raiseForStatus*(response: Response) {.raises: [HttpError].} =
+  ## Throws `HttpError` exceptions if status is 400 or above
+  if response.status >= 400: raise HttpError.newException("Status is: " &
+      $response.status)
+
 
 const defaultEncodeQueryParams = EncodeQueryParams(usePlus: false, omitEq: true, sep: '&')
 
@@ -74,7 +82,8 @@ proc request*(url: string, httpMethod: Method = Method.GET, headers: openArray[
   # Prepare client
 
   let client: HttpClient = if ignoreSsl:
-      newHttpClient(timeout = timeout, sslContext = newContext(verifyMode = CVerifyNone))
+      newHttpClient(timeout = timeout, sslContext = newContext(
+          verifyMode = CVerifyNone))
     else:
       newHttpClient(timeout = timeout)
 
@@ -113,7 +122,8 @@ proc request*(url: string, httpMethod: Method = Method.GET, headers: openArray[
   let response = client.request(innerUrl, httpMethod = innerMethod, body = body)
   client.close()
 
-  return response.toResp(requestUrl = innerUrl, requestHeaders = innerHeaders, requestHttpMethod = httpMethod)
+  return response.toResp(requestUrl = innerUrl, requestHeaders = innerHeaders,
+      requestHttpMethod = httpMethod)
 
 
 # Gnerating procs for individual HTTP methods

src/yahttp/exceptions.nim

@@ -0,0 +1 @@
+type HttpError* = object of IOError

tests/test_yahttp.nim

@@ -11,3 +11,10 @@ test "OK response":
 
 test "Not OK response":
   check not Response(status: 404).ok()
+
+test "Exception for 4xx and 5xx":
+  expect HttpError:
+    Response(status: 400).raiseForStatus()
+
+  expect HttpError:
+    Response(status: 599).raiseForStatus()

yahttp.nimble

@@ -1,6 +1,6 @@
 # Package
 
-version       = "0.6.0"
+version       = "0.7.0"
 author        = "Denis Mishankov"
 description   = "Awesome simple HTTP client"
 license       = "MIT"