JuliusBrussee/caveman · error

githubapp: decode repository proof: %w

Error message

githubapp: decode repository proof: %w

What it means

GetFileContent got a 200 from the contents endpoint but the JSON body did not decode into the type/encoding/content/size payload struct. The success response is not the documented file-content shape (e.g. a directory listing or an error page returned with 200).

Source

Thrown at shared/platform/githubapp/githubapp.go:325

	endpoint := "/repos/" + url.PathEscape(owner) + "/" + url.PathEscape(name) + "/contents/" + strings.Join(segments, "/")
	if strings.TrimSpace(ref) != "" {
		endpoint += "?" + url.Values{"ref": {ref}}.Encode()
	}
	status, raw, err := a.do(ctx, "Bearer "+token, http.MethodGet, endpoint, nil)
	if err != nil {
		return nil, err
	}
	if status != http.StatusOK {
		return nil, fmt.Errorf("githubapp: get repository proof: HTTP %d: %s", status, snippet(raw))
	}
	var payload struct {
		Type     string `json:"type"`
		Encoding string `json:"encoding"`
		Content  string `json:"content"`
		Size     int64  `json:"size"`
	}
	if err := json.Unmarshal(raw, &payload); err != nil {
		return nil, fmt.Errorf("githubapp: decode repository proof: %w", err)
	}
	if payload.Type != "file" || payload.Encoding != "base64" || payload.Size < 0 || payload.Size > 64<<10 {
		return nil, fmt.Errorf("githubapp: repository proof has invalid type, encoding, or size")
	}
	decoded, err := base64.StdEncoding.DecodeString(strings.ReplaceAll(payload.Content, "\n", ""))
	if err != nil {
		return nil, fmt.Errorf("githubapp: decode repository proof content: %w", err)
	}
	if len(decoded) > 64<<10 || int64(len(decoded)) != payload.Size {
		return nil, fmt.Errorf("githubapp: repository proof size mismatch")
	}
	return decoded, nil
}

// DoToken issues an authenticated GitHub REST call with an installation token and
// returns the status + raw body for the caller to parse. It is the reusable
// primitive the worker's PR opener builds the Git Data API flow on, so every
// GitHub egress goes through the one SSRF-guarded client + fixed base host.

View on GitHub (pinned to 766dce6b13)

Solutions

1. Retry the request; inspect the raw body if persistent for API schema drift

When it happens

Trigger: Thrown at shared/platform/githubapp/githubapp.go:325 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of JuliusBrussee/caveman@766dce6b13 (2026-08-18). Data as JSON: /api/errors/6b7bd21b3b338ed8. Report an issue: GitHub.