BUG/MINOR: detect when a raw configuration is uploaded incorrectly

Return an error when the user tries to upload an HAProxy configuration
file without any newline character. This can happen for example when
using curl(1) with bad options:

  # BAD! This will url-encode the file.
  curl -H 'Content-Type: text/plain' -d @haproxy.cfg $URL

  # GOOD. Upload without encoding.
  curl -H 'Content-Type: text/plain' -T haproxy.cfg $URL

Note that we still allow to upload an empty configuration, since this
is supported by HAProxy in master-worker mode, and it may actually be
useful in future releases.

e2e/tests/raw/data/haproxy.cfg

@@ -0,0 +1,34 @@
+global
+  chroot /var/lib/haproxy
+  user haproxy
+  group haproxy
+  maxconn 4000
+  pidfile /var/run/haproxy.pid
+  stats socket /var/lib/haproxy/stats level admin
+  log 127.0.0.1 local2
+
+defaults
+  mode http
+  maxconn 3000
+  log global
+  option httplog
+  option redispatch
+  option dontlognull
+  option http-server-close
+  option forwardfor except 127.0.0.0/8
+  timeout http-request 10s
+  timeout check 10s
+  timeout connect 10s
+  timeout client 1m
+  timeout queue 1m
+  timeout server 1m
+  timeout http-keep-alive 10s
+  retries 3
+
+backend test_backend
+  mode http
+  balance roundrobin
+  option forwardfor
+  server server_01 10.1.1.1:8080 check weight 80
+  server server_02 10.1.1.2:8080 check weight 80
+  server server_03 10.1.1.2:8080 check weight 80

e2e/tests/raw/data/haproxy.cfg.json

@@ -0,0 +1 @@
+"global\n  chroot /var/lib/haproxy\n  user haproxy\n  group haproxy\n  maxconn 4000\n  pidfile /var/run/haproxy.pid\n  stats socket /var/lib/haproxy/stats level admin\n  log 127.0.0.1 local2\n\ndefaults\n  mode http\n  maxconn 3000\n  log global\n  option httplog\n  option redispatch\n  option dontlognull\n  option http-server-close\n  option forwardfor except 127.0.0.0/8\n  timeout http-request 10s\n  timeout check 10s\n  timeout connect 10s\n  timeout client 1m\n  timeout queue 1m\n  timeout server 1m\n  timeout http-keep-alive 10s\n  retries 3\n\nbackend test_backend\n  mode http\n  balance roundrobin\n  option forwardfor\n  server server_01 10.1.1.1:8080 check weight 80\n  server server_02 10.1.1.2:8080 check weight 80\n  server server_03 10.1.1.2:8080 check weight 80\n"

e2e/tests/raw/get.bats

@@ -0,0 +1,30 @@
+#!/usr/bin/env bats
+#
+# Copyright 2023 HAProxy Technologies
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+load '../../libs/dataplaneapi'
+load "../../libs/get_json_path"
+load '../../libs/haproxy_config_setup'
+load '../../libs/resource_client'
+
+load 'utils/_helpers'
+
+@test "raw: Download configuration" {
+  resource_get "$_RAW_BASE_PATH"
+  assert_equal "$SC" 200
+  test -n "$(get_json_path "$BODY" .data)" ||
+    fail "failed to download raw config. BODY: '$BODY'"
+}

e2e/tests/raw/post.bats

@@ -0,0 +1,36 @@
+#!/usr/bin/env bats
+#
+# Copyright 2023 HAProxy Technologies
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+load '../../libs/dataplaneapi'
+load '../../libs/debug'
+load "../../libs/get_json_path"
+load '../../libs/haproxy_config_setup'
+load '../../libs/resource_client'
+load '../../libs/version'
+
+load 'utils/_helpers'
+
+@test "raw: Post new configuration" {
+  resource_post "$_RAW_BASE_PATH" 'data/haproxy.cfg.json'
+  assert_equal "$SC" 202
+}
+
+@test "raw: Post new configuration incorrectly (bug 1219)" {
+  resource_post_text "$_RAW_BASE_PATH" 'data/haproxy.cfg.json'
+  assert_equal "$SC" 400
+  assert_equal "$(get_json_path "$BODY" '.message')" "invalid configuration: no newline character found"
+}

e2e/tests/raw/utils/_helpers.bash

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+#
+# Copyright 2023 HAProxy Technologies
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+_RAW_BASE_PATH="/services/haproxy/configuration/raw"
+
+# Identical to resource_post() but with the text/plain content type.
+function resource_post_text() {
+  local endpoint="$1" data="@${BATS_TEST_DIRNAME}/$2" qs_params="$3"
+
+  run curl -m 10 -s -H 'content-type: text/plain' --user dataplaneapi:mypassword \
+    "-XPOST" -w "\n%{http_code}" "-d${data}" \
+    "http://${LOCAL_IP_ADDRESS}:${E2E_PORT}${BASE_PATH}${endpoint}?$qs_params&version=$(version)"
+	assert_success
+	dpa_curl_status_body '$output'
+}

handlers/raw.go

@@ -95,6 +95,15 @@ func (h *PostRawConfigurationHandlerImpl) Handle(params configuration.PostHAProx
 		onlyValidate = *params.OnlyValidate
 	}
 
+	// Check for a common error where the user ran `curl -d @haproxy.cfg` without
+	// converting the file to json, which removes all the \n from the configuration.
+	if len(params.Data) > 0 && !strings.ContainsRune(params.Data, '\n') {
+		code := misc.ErrHTTPBadRequest
+		msg := "invalid configuration: no newline character found"
+		e := &models.Error{Code: &code, Message: &msg}
+		return configuration.NewPostHAProxyConfigurationBadRequest().WithPayload(e)
+	}
+
 	cfg, err := h.Client.Configuration()
 	if err != nil {
 		e := misc.HandleError(err)