feat: update clients (aws#717)

* [aws#694](aws#694)
* [smithy-typescript#66](smithy-lang/smithy-typescript#66)
* [smithy-typescript#87](smithy-lang/smithy-typescript#87)

Author: AllanZhengYP

clients/client-acm-pca/protocols/Aws_json1_1.ts

@@ -135,11 +135,6 @@ async function deserializeAws_restJson1_1DeleteConnectionCommandError(
   output: __HttpResponse,
   context: __SerdeContext
 ): Promise<DeleteConnectionCommandOutput> {
-  const data: any = await parseBody(output.body, context);
-  const parsedOutput: any = {
-    ...output,
-    body: data
-  };
   let response: __SmithyException & __MetadataBearer;
   let errorCode: String = "UnknownError";
   if (output.headers["x-amzn-errortype"]) {
@@ -149,21 +144,21 @@ async function deserializeAws_restJson1_1DeleteConnectionCommandError(
     case "ForbiddenException":
     case "com.amazonaws.apigatewaymanagementapi#ForbiddenException":
       response = await deserializeAws_restJson1_1ForbiddenExceptionResponse(
-        parsedOutput,
+        output,
         context
       );
       break;
     case "GoneException":
     case "com.amazonaws.apigatewaymanagementapi#GoneException":
       response = await deserializeAws_restJson1_1GoneExceptionResponse(
-        parsedOutput,
+        output,
         context
       );
       break;
     case "LimitExceededException":
     case "com.amazonaws.apigatewaymanagementapi#LimitExceededException":
       response = await deserializeAws_restJson1_1LimitExceededExceptionResponse(
-        parsedOutput,
+        output,
         context
       );
       break;
@@ -211,11 +206,6 @@ async function deserializeAws_restJson1_1GetConnectionCommandError(
   output: __HttpResponse,
   context: __SerdeContext
 ): Promise<GetConnectionCommandOutput> {
-  const data: any = await parseBody(output.body, context);
-  const parsedOutput: any = {
-    ...output,
-    body: data
-  };
   let response: __SmithyException & __MetadataBearer;
   let errorCode: String = "UnknownError";
   if (output.headers["x-amzn-errortype"]) {
@@ -225,21 +215,21 @@ async function deserializeAws_restJson1_1GetConnectionCommandError(
     case "ForbiddenException":
     case "com.amazonaws.apigatewaymanagementapi#ForbiddenException":
       response = await deserializeAws_restJson1_1ForbiddenExceptionResponse(
-        parsedOutput,
+        output,
         context
       );
       break;
     case "GoneException":
     case "com.amazonaws.apigatewaymanagementapi#GoneException":
       response = await deserializeAws_restJson1_1GoneExceptionResponse(
-        parsedOutput,
+        output,
         context
       );
       break;
     case "LimitExceededException":
     case "com.amazonaws.apigatewaymanagementapi#LimitExceededException":
       response = await deserializeAws_restJson1_1LimitExceededExceptionResponse(
-        parsedOutput,
+        output,
         context
       );
       break;
@@ -273,11 +263,6 @@ async function deserializeAws_restJson1_1PostToConnectionCommandError(
   output: __HttpResponse,
   context: __SerdeContext
 ): Promise<PostToConnectionCommandOutput> {
-  const data: any = await parseBody(output.body, context);
-  const parsedOutput: any = {
-    ...output,
-    body: data
-  };
   let response: __SmithyException & __MetadataBearer;
   let errorCode: String = "UnknownError";
   if (output.headers["x-amzn-errortype"]) {
@@ -287,28 +272,28 @@ async function deserializeAws_restJson1_1PostToConnectionCommandError(
     case "ForbiddenException":
     case "com.amazonaws.apigatewaymanagementapi#ForbiddenException":
       response = await deserializeAws_restJson1_1ForbiddenExceptionResponse(
-        parsedOutput,
+        output,
         context
       );
       break;
     case "GoneException":
     case "com.amazonaws.apigatewaymanagementapi#GoneException":
       response = await deserializeAws_restJson1_1GoneExceptionResponse(
-        parsedOutput,
+        output,
         context
       );
       break;
     case "LimitExceededException":
     case "com.amazonaws.apigatewaymanagementapi#LimitExceededException":
       response = await deserializeAws_restJson1_1LimitExceededExceptionResponse(
-        parsedOutput,
+        output,
         context
       );
       break;
     case "PayloadTooLargeException":
     case "com.amazonaws.apigatewaymanagementapi#PayloadTooLargeException":
       response = await deserializeAws_restJson1_1PayloadTooLargeExceptionResponse(
-        parsedOutput,
+        output,
         context
       );
       break;
@@ -368,7 +353,7 @@ const deserializeAws_restJson1_1PayloadTooLargeExceptionResponse = async (
     $metadata: deserializeMetadata(output),
     Message: undefined
   };
-  const data: any = output.body;
+  const data: any = await parseBody(output.body, context);
   if (data.message !== undefined) {
     contents.Message = data.message;
   }
@@ -399,9 +384,26 @@ const deserializeMetadata = (output: __HttpResponse): __ResponseMetadata => ({
   requestId: output.headers["x-amzn-requestid"]
 });
 
+// Collect low-level response body stream to Uint8Array.
+const collectBody = (
+  streamBody: any,
+  context: __SerdeContext
+): Promise<Uint8Array> => {
+  return context.streamCollector(streamBody) || new Uint8Array();
+};
+
+// Encode Uint8Array data into string with utf-8.
+const collectBodyString = (
+  streamBody: any,
+  context: __SerdeContext
+): Promise<string> => {
+  return collectBody(streamBody, context).then(body =>
+    context.utf8Encoder(body)
+  );
+};
+
 const parseBody = (streamBody: any, context: __SerdeContext): any => {
-  return context.streamCollector(streamBody).then((body: any) => {
-    const encoded = context.utf8Encoder(body);
+  return collectBodyString(streamBody, context).then(encoded => {
     if (encoded.length) {
       return JSON.parse(encoded);
     }