Removed fileParams as the file content will be posted via postBody, fixed file upload issue

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

@@ -104,6 +104,7 @@ public class GoClientCodegen extends DefaultCodegen implements CodegenConfig {
         importMapping = new HashMap<String, String>();
         importMapping.put("time.Time", "time");
         importMapping.put("*os.File", "os");
+        importMapping.put("ioutil", "io/ioutil");
 
         cliOptions.clear();
         cliOptions.add(new CliOption(CodegenConstants.PACKAGE_NAME, "Go package name (convention: lowercase).")

modules/swagger-codegen/src/main/resources/go/api.mustache

@@ -58,7 +58,6 @@ func (a {{classname}}) {{nickname}} ({{#allParams}}{{paramName}} {{{dataType}}}{
     headerParams := make(map[string]string)
     queryParams := make(map[string]string)
     formParams := make(map[string]string)
-    fileParams := make(map[string]string)
     var postBody interface{}
 
     {{#authMethods}}// authentication ({{name}}) required
@@ -123,23 +122,24 @@ func (a {{classname}}) {{nickname}} ({{#allParams}}{{paramName}} {{{dataType}}}{
 {{/headerParams}}{{/hasHeaderParams}}
 {{#hasFormParams}}    
 {{#formParams}}
-    {{#isFile}}
-    fileParams["{{vendorExtensions.x-exportParamName}}"] = {{paramName}}.Name()
+    {{#isFile}}fileBytes, _ := ioutil.ReadAll(file)
+    postBody = fileBytes
     {{/isFile}}
     {{^isFile}}
     formParams["{{vendorExtensions.x-exportParamName}}"] = {{paramName}}
     {{/isFile}}    
 {{/formParams}}
-{{/hasFormParams}}
-{{#hasBodyParam}}{{#bodyParams}}
+{{/hasFormParams}}{{#hasBodyParam}}{{#bodyParams}}
     // body params
     postBody = &{{paramName}}
 {{/bodyParams}}{{/hasBodyParam}}
 {{#returnType}}  var successPayload = new({{returnType}}){{/returnType}}
+{{#returnType}}  httpResponse, err := a.Configuration.ApiClient.CallApi(path, httpMethod, postBody, headerParams, queryParams, formParams)
+{{/returnType}}
+{{^returnType}}  _, err := a.Configuration.ApiClient.CallApi(path, httpMethod, postBody, headerParams, queryParams, formParams)
+{{/returnType}}
 
-  httpResponse, err := a.Configuration.ApiClient.CallApi(path, httpMethod, postBody, headerParams, queryParams, formParams, fileParams)
-
-  if err != nil && httpResponse.StatusCode() != 200{
+  if err != nil {
     return {{#returnType}}*successPayload, {{/returnType}}err
   }
 

modules/swagger-codegen/src/main/resources/go/api_client.mustache

@@ -48,10 +48,9 @@ func (c *ApiClient) CallApi(path string, method string,
     postBody interface{},
     headerParams map[string]string,
     queryParams map[string]string,
-    formParams map[string]string,
-    fileParams map[string]string) (*resty.Response, error) {
+    formParams map[string]string) (*resty.Response, error) {
 
-    request := prepareRequest(postBody, headerParams, queryParams, formParams, fileParams)
+    request := prepareRequest(postBody, headerParams, queryParams, formParams)
 
     switch strings.ToUpper(method) {
     case "GET":
@@ -77,7 +76,7 @@ func (c *ApiClient) CallApi(path string, method string,
 func (c *ApiClient) ParameterToString (obj interface{}) string {
     if reflect.TypeOf(obj).String() == "[]string" {
         return strings.Join(obj.([]string), ",")
-    } else{
+    } else {
         return obj.(string)
     }
 }
@@ -85,8 +84,7 @@ func (c *ApiClient) ParameterToString (obj interface{}) string {
 func prepareRequest(postBody interface{},
     headerParams map[string]string,
     queryParams map[string]string,
-    formParams map[string]string,
-    fileParams map[string]string) *resty.Request {
+    formParams map[string]string) *resty.Request {
 
     request := resty.R()
 
@@ -102,15 +100,5 @@ func prepareRequest(postBody interface{},
         request.SetQueryParams(queryParams)
     }
 
-    // add form parameter, if any
-    if len(fileParams) > 0 {
-        request.SetFormData(formParams)
-    }
-
-    // add file parameter, if any
-    if len(fileParams) > 0 {
-        request.SetFiles(fileParams)
-    }
-    
     return request
 }