80 lines
2.1 KiB
Go
Executable File
80 lines
2.1 KiB
Go
Executable File
package server
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import (
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"encoding/json"
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"errors"
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"log/slog"
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"net/http"
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"ddc/internal/diskspace"
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"ddc/internal/files"
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"ddc/internal/jobs"
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"ddc/internal/preferences"
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)
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type errorResponse struct {
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Error string `json:"error"`
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RequestID string `json:"requestId,omitempty"`
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}
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func writeJSON(writer http.ResponseWriter, status int, payload any) {
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writer.Header().Set("Content-Type", "application/json; charset=utf-8")
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writer.WriteHeader(status)
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if err := json.NewEncoder(writer).Encode(payload); err != nil {
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slog.Debug("could not write response", "error", err)
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}
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}
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func writeError(writer http.ResponseWriter, status int, message string) {
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writeJSON(writer, status, errorResponse{Error: message, RequestID: writer.Header().Get("X-Request-ID")})
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}
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func writeFailure(writer http.ResponseWriter, request *http.Request, err error) {
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status := statusFor(err)
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if status != http.StatusInternalServerError {
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writeError(writer, status, err.Error())
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return
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}
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requestID := requestIDFrom(request)
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slog.Error("request failed",
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"request_id", requestID,
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"method", request.Method,
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"path", request.URL.Path,
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"error", err,
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)
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writeError(writer, status, internalErrorMessage(requestID))
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}
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func decodeBody(writer http.ResponseWriter, request *http.Request, target any) bool {
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decoder := json.NewDecoder(request.Body)
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decoder.DisallowUnknownFields()
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err := decoder.Decode(target)
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if err == nil {
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return true
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}
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var tooLarge *http.MaxBytesError
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if errors.As(err, &tooLarge) {
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writeError(writer, http.StatusRequestEntityTooLarge, "request body is too large")
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return false
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}
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writeError(writer, http.StatusBadRequest, "invalid request body: "+err.Error())
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return false
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}
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func statusFor(err error) int {
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switch {
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case errors.Is(err, jobs.ErrJobNotFound):
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return http.StatusNotFound
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case errors.Is(err, jobs.ErrJobBusy), errors.Is(err, files.ErrDestinationExists):
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return http.StatusConflict
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case errors.Is(err, jobs.ErrInvalidRequest), errors.Is(err, preferences.ErrInvalid):
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return http.StatusBadRequest
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case errors.Is(err, diskspace.ErrInsufficientSpace):
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return http.StatusInsufficientStorage
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default:
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return http.StatusInternalServerError
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}
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}
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