Add file response support for typescript-node

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/TypeScriptNodeClientCodegen.java

@@ -1,5 +1,7 @@
 package io.swagger.codegen.languages;
 
+import io.swagger.models.properties.FileProperty;
+import io.swagger.models.properties.Property;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -27,6 +29,8 @@ public class TypeScriptNodeClientCodegen extends AbstractTypeScriptClientCodegen
     public TypeScriptNodeClientCodegen() {
         super();
 
+        typeMapping.put("file", "Buffer");
+
         // clear import mapping (from default generator) as TS does not use it
         // at the moment
         importMapping.clear();
@@ -92,6 +96,19 @@ public class TypeScriptNodeClientCodegen extends AbstractTypeScriptClientCodegen
         return "Generates a TypeScript nodejs client library.";
     }
 
+    @Override
+    public boolean isDataTypeFile(final String dataType) {
+        return dataType != null && dataType.equals("Buffer");
+    }
+
+    @Override
+    public String getTypeDeclaration(Property p) {
+        if (p instanceof FileProperty) {
+            return "Buffer";
+        }
+        return super.getTypeDeclaration(p);
+    }
+
 
     public void setNpmName(String npmName) {
         this.npmName = npmName;

modules/swagger-codegen/src/main/resources/typescript-node/api.mustache

@@ -235,7 +235,12 @@ export class {{classname}} {
             headers: headerParams,
             uri: localVarPath,
             useQuerystring: this._useQuerystring,
+{{^isResponseFile}}
             json: true,
+{{/isResponseFile}}
+{{#isResponseFile}}
+            encoding: null,
+{{/isResponseFile}}
 {{#bodyParam}}
             body: {{paramName}},
 {{/bodyParam}}