Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

[Typescript][Angular] Status Code 204: Accept-Content Header

Open Beginner friendly
#9,892 0 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
62/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Stale
Tech stack
angular, typescript
Domain
api, tooling

Research direction

Start in modules/openapi-generator/src/main/resources/Javascript/ApiClient.mustache and inspect how contentTypes are handled for the 204 response in the provided OpenAPI declaration. Generate the TypeScript/Angular client and observe the request headers. Done means the empty 204 response no longer produces an application/json Accept-Content header.

Written by the indexing model from the issue text.

Description

Description

Wrong Accept-Content Header for empty response types

Swagger-codegen version

3.0.14

Swagger declaration file content or url
delete:
      operationId: deletePartnerByID
      tags:
        -Partner
      summary: Deletes a communication partner
      parameters:
        - name: deletePartnerByID
          in: path
          description: ID of partner to delete
          required: true
          schema:
            type: integer
            format: int64
      responses:
        204:
          description: OK
        400:
          description: Invalid ID supplied
          content:
            application/json: {}
        404:
          description: Communication partner not found
          content:
            application/json: {}
Command line used for generation

not needed

Steps to reproduce

Follow the Guideline How to make OpenAPI 3.0 to send an empty Accept-Content Header
https://swagger.io/docs/specification/describing-responses/
(In Our Case for HTTP Status code 204)
Test the generated code.
Watch Request Headers
See Accept-Content Header "application/json"

Related issues/PRs
Suggest a fix/enhancement

Fix this code in modules/openapi-generator/src/main/resources/Javascript/ApiClient.mustache

 var contentType = this.jsonPreferredMime(contentTypes);
    if (contentType) {
      if(contentType != 'multipart/form-data') {
        request.type(contentType);
      }
    } else if (!request.header['Content-Type']) {
      request.type('application/json');
    }
Dominant language
Mustache
Stars
17.8k
Forks
6k
PR merge metrics
No merged PRs in 30d

Getting set up

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

More from swagger-api/swagger-codegen

All issues in swagger-api/swagger-codegen

Similar issues

More Backend & API Design issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.