feat: extended URI encoding (#915)

codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsProtocolUtils.java

@@ -140,9 +140,11 @@ static void generateBuildFormUrlencodedString(GenerationContext context) {
         TypeScriptWriter writer = context.getWriter();
 
         // Write a single function to handle combining a map in to a valid query string.
+        writer.addImport("extendedEncodeURIComponent", "__extendedEncodeURIComponent", "@aws-sdk/smithy-client");
         writer.openBlock("const buildFormUrlencodedString = (entries: any): string => {", "}", () -> {
             writer.openBlock("return Object.keys(entries).map(", ").join(\"&\");", () ->
-                    writer.write("key => encodeURIComponent(key) + '=' + encodeURIComponent(entries[key])"));
+                    writer.write("key => __extendedEncodeURIComponent(key) + '=' + "
+                            + "__extendedEncodeURIComponent(entries[key])"));
         });
         writer.write("");
     }

packages/smithy-client/src/extended-encode-uri-component.ts

@@ -0,0 +1,9 @@
+/**
+ * Function that wraps encodeURIComponent to encode additional characters
+ * to fully adhere to RFC 3986.
+ */
+export function extendedEncodeURIComponent(str: string): string {
+  return encodeURIComponent(str).replace(/[!'()*]/g, function(c) {
+    return "%" + c.charCodeAt(0).toString(16);
+  });
+}

packages/smithy-client/src/index.ts

@@ -4,3 +4,4 @@ export * from "./document-type";
 export * from "./exception";
 export * from "./isa";
 export * from "./lazy-json";
+export * from "./extended-encode-uri-component";