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8d2740624f* Structured JSON error responses for API endpoints
API handlers returned errors via http.Error (text/plain) with ad-hoc
strings, while the mirror API used a different {"error": "..."} shape
and leaked internal err.Error() text to clients.
Add ErrorResponse{Code, Message} with stable codes (BAD_REQUEST,
NOT_FOUND, UPSTREAM_ERROR, INTERNAL_ERROR) and writeError/badRequest/
notFound/internalError helpers. Convert all JSON API handlers in
api.go, browse.go, mirror_api.go and the /stats endpoint. Enrichment
failures now report 502 UPSTREAM_ERROR rather than 500.
Protocol handlers in internal/handler/ are deliberately unchanged
since npm/pip/cargo clients expect their own response formats, not
JSON. HTML page handlers in server.go also keep text/plain.
Swagger @Failure annotations updated and docs regenerated.
Fixes #76
* Convert validatePackagePath errors to JSON in API handlers
42 lines
1.3 KiB
Go
42 lines
1.3 KiB
Go
package server
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import (
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"encoding/json"
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"net/http"
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)
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// Error codes returned in API error responses. These are stable identifiers
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// that clients can match on; the message text is for humans and may change.
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const (
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ErrCodeBadRequest = "BAD_REQUEST"
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ErrCodeNotFound = "NOT_FOUND"
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ErrCodeUpstream = "UPSTREAM_ERROR"
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ErrCodeInternal = "INTERNAL_ERROR"
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)
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// ErrorResponse is the JSON body returned for API errors.
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type ErrorResponse struct {
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Code string `json:"code"`
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Message string `json:"message"`
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}
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// writeError sends a JSON error response with the given status, code and
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// user-facing message. Internal error details should be logged separately
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// by the caller, never passed as the message.
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func writeError(w http.ResponseWriter, status int, code, message string) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(status)
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_ = json.NewEncoder(w).Encode(ErrorResponse{Code: code, Message: message})
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}
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func badRequest(w http.ResponseWriter, message string) {
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writeError(w, http.StatusBadRequest, ErrCodeBadRequest, message)
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}
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func notFound(w http.ResponseWriter, message string) {
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writeError(w, http.StatusNotFound, ErrCodeNotFound, message)
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}
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func internalError(w http.ResponseWriter, message string) {
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writeError(w, http.StatusInternalServerError, ErrCodeInternal, message)
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}
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