Bug fix #124: Unicode support for execute-request (#128)

* #124: Unicode support for execute-request.
When a body is sent with multipart-form-dara content type, we were using the default content type when adding the multipart string to the actual MultipartEntity object. This default content type is plain/text with ISO_8859_1 encoding charset. The fix was to enforce using StandarCharsets.UTF_8.

workflow-bot-app/src/main/java/com/symphony/bdk/workflow/engine/executor/request/client/HttpClient.java

@@ -64,25 +64,26 @@ private HttpResponse executeWithBody(Request request, Object body, Map<String, S
       throws IOException {
 
     // set body
-    String contentType = headers.get(HttpHeaders.CONTENT_TYPE);
-    if (body != null && ContentType.MULTIPART_FORM_DATA.getMimeType().equals(contentType)) {
+    String headerContentType = headers.get(HttpHeaders.CONTENT_TYPE);
+    if (body != null && ContentType.MULTIPART_FORM_DATA.getMimeType().equals(headerContentType)) {
 
       final MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder
           .create();
 
       Map<String, Object> bodyAsMap = (LinkedHashMap<String, Object>) body;
-      bodyAsMap.forEach((key, value) -> multipartEntityBuilder.addTextBody(key, value.toString()));
+      ContentType textBodyContentType = ContentType.create("text/plain", StandardCharsets.UTF_8);
+      bodyAsMap.forEach((key, value) -> multipartEntityBuilder.addTextBody(key, value.toString(), textBodyContentType));
 
       request.body(multipartEntityBuilder.build());
 
       // The content type with boundary is provided in the entity, otherwise it is overridden
       headers.remove(HttpHeaders.CONTENT_TYPE);
 
-    } else if (body != null && StringUtils.isNotEmpty(contentType)) {
-      if (contentType.equals(ContentType.APPLICATION_JSON.getMimeType()) && !(body instanceof String)) {
+    } else if (body != null && StringUtils.isNotEmpty(headerContentType)) {
+      if (headerContentType.equals(ContentType.APPLICATION_JSON.getMimeType()) && !(body instanceof String)) {
         request.bodyString(OBJECT_MAPPER.writeValueAsString(body), ContentType.APPLICATION_JSON);
       } else {
-        request.bodyString(body.toString(), ContentType.parse(contentType));
+        request.bodyString(body.toString(), ContentType.parse(headerContentType));
       }
 
     } else if (body != null) { // if no content type is provided, we set application/json by default

workflow-bot-app/src/test/java/com/symphony/bdk/workflow/ExecuteRequestIntegrationTest.java

@@ -1,6 +1,7 @@
 package com.symphony.bdk.workflow;
 
 import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
+import static com.github.tomakehurst.wiremock.client.WireMock.containing;
 import static com.github.tomakehurst.wiremock.client.WireMock.delete;
 import static com.github.tomakehurst.wiremock.client.WireMock.equalTo;
 import static com.github.tomakehurst.wiremock.client.WireMock.equalToJson;
@@ -71,6 +72,26 @@ void executeRequestSuccessful(MappingBuilder method, String swadlFile, List<Stri
     assertThat(workflow).isExecuted().executed(activitiesToBeExecuted.toArray(new String[0]));
   }
 
+  @Test
+  void executeRequestEncodeBody(WireMockRuntimeInfo wmRuntimeInfo) throws Exception {
+    final Workflow workflow =
+        SwadlParser.fromYaml(getClass().getResourceAsStream("/request/execute-request-encode-body.swadl.yaml"));
+
+    this.putFirstActivityUrl(workflow, wmRuntimeInfo.getHttpBaseUrl() + "/api");
+
+    stubFor(post(UrlPattern.ANY)
+        .withHeader("Content-Type", containing("multipart/form-data; charset=ISO-8859-1;"))
+        .withRequestBody(containing("Content-Type: text/plain; charset=UTF-8"))
+        .withRequestBody(containing("Content-Disposition: form-data; name=\"text\""))
+        .willReturn(ok()));
+
+    engine.deploy(workflow);
+
+    engine.onEvent(messageReceived("/executeEncodeBody"));
+
+    assertThat(workflow).isExecuted().executed("executeRequestEncodeBody", "assertionScript");
+  }
+
   @Test
   void executeRequestSuccessfulToDelete(WireMockRuntimeInfo wmRuntimeInfo) throws Exception {
     final Workflow workflow =

workflow-bot-app/src/test/resources/request/execute-request-encode-body.swadl.yaml

@@ -0,0 +1,18 @@
+id: execute-request-encode-body
+activities:
+  - execute-request:
+      id: executeRequestEncodeBody
+      on:
+        message-received:
+          content: "/executeEncodeBody"
+      method: POST
+      url: https://wiremock.com/api
+      body:
+        text: こんにちは世界
+      headers:
+        Content-Type: multipart/form-data
+
+  - execute-script:
+      id: assertionScript
+      script: |
+        assert executeRequestEncodeBody.outputs.status == 200