42 lines
1.5 KiB
Go
42 lines
1.5 KiB
Go
package api
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import (
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"context"
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"encoding/json"
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"fmt"
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"github.com/openHPI/poseidon/pkg/dto"
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"net/http"
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)
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func writeInternalServerError(writer http.ResponseWriter, err error, errorCode dto.ErrorCode, ctx context.Context) {
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sendJSON(writer, &dto.InternalServerError{Message: err.Error(), ErrorCode: errorCode},
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http.StatusInternalServerError, ctx)
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}
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func writeClientError(writer http.ResponseWriter, err error, status uint16, ctx context.Context) {
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sendJSON(writer, &dto.ClientError{Message: err.Error()}, int(status), ctx)
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}
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func sendJSON(writer http.ResponseWriter, content interface{}, httpStatusCode int, ctx context.Context) {
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writer.Header().Set("Content-Type", "application/json")
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writer.WriteHeader(httpStatusCode)
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response, err := json.Marshal(content)
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if err != nil {
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// cannot produce infinite recursive loop, since json.Marshal of dto.InternalServerError won't return an error
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writeInternalServerError(writer, err, dto.ErrorUnknown, ctx)
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return
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}
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if _, err = writer.Write(response); err != nil {
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log.WithError(err).WithContext(ctx).Error("Could not write JSON response")
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http.Error(writer, err.Error(), http.StatusInternalServerError)
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}
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}
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func parseJSONRequestBody(writer http.ResponseWriter, request *http.Request, structure interface{}) error {
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if err := json.NewDecoder(request.Body).Decode(structure); err != nil {
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writeClientError(writer, err, http.StatusBadRequest, request.Context())
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return fmt.Errorf("error parsing JSON request body: %w", err)
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}
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return nil
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}
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