FileUpload changes in generated curl request when adding a header using requestInterceptor

[mike2184]

Q&A (please complete the following information)

• OS: macOS
• Browser: chrome
• Version: 81.0.4044.138 (Official Build) (64-bit)
• Method of installation: dist assets
• Swagger-UI version: 3.10.0 (I've tried several versions and it happens with them all)
• Swagger/OpenAPI version: Swagger 2.0 (Happens with both Swagger 2.0 and OpenAPI 3.0)

Content & configuration

I created an example project on github to demonstrate the issue. https://github.com/mike2184/swagger-ui-test
Swagger UI hosted on GItHub pages here: https://mike2184.github.io/swagger-ui-test/#/pet/uploadFile

Example Swagger/OpenAPI definition:
I'm using https://petstore.swagger.io/v2/swagger.json in the example I created to show this issue.

Swagger-UI configuration options:

const ui = SwaggerUIBundle({
				url : "./swagger.yaml",
				dom_id : '#swagger-ui',
				deepLinking : true,
				presets : [ SwaggerUIBundle.presets.apis,
						SwaggerUIStandalonePreset ],
				plugins : [ SwaggerUIBundle.plugins.DownloadUrl ],
				layout : "StandaloneLayout",
				requestInterceptor : function(req) {
					// Having the following line of code that adds a header causes the generated curl request to change from
					// -F "file=@cake.jpg;type=image/jpeg" to -d {"file":{}}
					req.headers['x-test-header'] = 'test value'; 
					return req;
				}
			})

Describe the bug you're encountering

If I make any changes to the headers using the requestInterceptor it changes the file upload in the generated curl request from -F "file=@cake.jpg;type=image/jpeg" to -d {"file":{}}

To reproduce...

Steps to reproduce the behavior:

1. Go to https://mike2184.github.io/swagger-ui-test/#/pet/uploadFile
2. Click Try it out for /pet/{petId}/uploadImage API
3. Set petId to 1
4. Click choose file and select any image file
5. Click execute
6. Notice: generated curl request has -d {"file":{}} instead of -F "file=@cake.jpg;type=image/jpeg"

Expected behavior

Generated curl request should be -F "file=@cake.jpg;type=image/jpeg"

Screenshots

[tim-lai]

@mike2184 Please update SwaggerUI to latest. In particular, 3.26.0 resolved issues with curl strings.

[mike2184]

@tim-lai - I updated my test git repo to use swagger-ui 3.26.2 (https://github.com/swagger-api/swagger-ui/tree/v3.26.2) and I am still seeing the issue.

[tim-lai]

@mike2184 Fyi, this fix is in today's release. Thanks.

[mike2184]

@tim-lai - Just updated to the new version and gave it a try and it is now working as expected. Thanks so much for looking into this and for the speedy fix!