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https://github.com/fnproject/fn.git
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2551be446a
* fn: introducing 503 responses for out of capacity case *) Adding 503 with Retry-After header case if request failed during waiting for slots. *) TODO: return 503 without Retry-After if the request can never be met by this fn server. *) fn: runner test docker pull fixup *) fn: MaxMemory for routes is now a variable to allow testing and adjusting it according to fleet memory sizes.
53 lines
1.6 KiB
Go
53 lines
1.6 KiB
Go
package server
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import (
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"context"
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"encoding/json"
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"errors"
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"net/http"
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"runtime/debug"
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"github.com/fnproject/fn/api/common"
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"github.com/fnproject/fn/api/models"
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"github.com/gin-gonic/gin"
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"github.com/sirupsen/logrus"
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)
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// ErrInternalServerError returned when something exceptional happens.
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var ErrInternalServerError = errors.New("internal server error")
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func simpleError(err error) *models.Error {
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return &models.Error{Error: &models.ErrorBody{Message: err.Error()}}
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}
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func handleErrorResponse(c *gin.Context, err error) {
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HandleErrorResponse(c.Request.Context(), c.Writer, err)
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}
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// HandleErrorResponse used to handle response errors in the same way.
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func HandleErrorResponse(ctx context.Context, w http.ResponseWriter, err error) {
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log := common.Logger(ctx)
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var statuscode int
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if e, ok := err.(models.APIError); ok {
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if e.Code() >= 500 {
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log.WithFields(logrus.Fields{"code": e.Code()}).WithError(e).Error("api error")
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}
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if err == models.ErrCallTimeoutServerBusy {
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// TODO: Determine a better delay value here (perhaps ask Agent). For now 15 secs with
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// the hopes that fnlb will land this on a better server immediately.
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w.Header().Set("Retry-After", "15")
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}
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statuscode = e.Code()
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} else {
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log.WithError(err).WithFields(logrus.Fields{"stack": string(debug.Stack())}).Error("internal server error")
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statuscode = http.StatusInternalServerError
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err = ErrInternalServerError
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}
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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w.WriteHeader(statuscode)
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err = json.NewEncoder(w).Encode(simpleError(err))
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if err != nil {
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log.WithError(err).Errorln("error encoding error json")
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}
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}
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