mirror of
https://github.com/fnproject/fn.git
synced 2022-10-28 21:29:17 +03:00
103 lines
2.7 KiB
Go
103 lines
2.7 KiB
Go
package server
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import (
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"bytes"
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"context"
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"net/http"
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"path"
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"strings"
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"github.com/fnproject/fn/api"
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"github.com/fnproject/fn/api/agent"
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"github.com/fnproject/fn/api/models"
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"github.com/gin-gonic/gin"
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)
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type runnerResponse struct {
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RequestID string `json:"request_id,omitempty"`
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Error *models.ErrorBody `json:"error,omitempty"`
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}
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func (s *Server) handleRequest(c *gin.Context) {
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if strings.HasPrefix(c.Request.URL.Path, "/v1") {
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c.Status(http.StatusNotFound)
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return
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}
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ctx := c.Request.Context()
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r, routeExists := c.Get(api.Path)
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if !routeExists {
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r = "/"
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}
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reqRoute := &models.Route{
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AppName: c.MustGet(api.AppName).(string),
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Path: path.Clean(r.(string)),
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}
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s.FireBeforeDispatch(ctx, reqRoute)
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s.serve(c, reqRoute.AppName, reqRoute.Path)
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s.FireAfterDispatch(ctx, reqRoute)
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}
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// TODO it would be nice if we could make this have nothing to do with the gin.Context but meh
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// TODO make async store an *http.Request? would be sexy until we have different api format...
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func (s *Server) serve(c *gin.Context, appName, path string) {
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// GetCall can mod headers, assign an id, look up the route/app (cached),
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// strip params, etc.
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call, err := s.Agent.GetCall(
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agent.WithWriter(c.Writer), // XXX (reed): order matters [for now]
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agent.FromRequest(appName, path, c.Request),
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)
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if err != nil {
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handleErrorResponse(c, err)
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return
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}
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// TODO we could add FireBeforeDispatch right here with Call in hand
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if model := call.Model(); model.Type == "async" {
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// TODO we should push this into GetCall somehow (CallOpt maybe) or maybe agent.Queue(Call) ?
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buf := bytes.NewBuffer(make([]byte, 0, c.Request.ContentLength)) // TODO sync.Pool me
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_, err := buf.ReadFrom(c.Request.Body)
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if err != nil {
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handleErrorResponse(c, models.ErrInvalidPayload)
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return
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}
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model.Payload = buf.String()
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// TODO we should probably add this to the datastore too. consider the plumber!
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_, err = s.MQ.Push(c.Request.Context(), model)
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if err != nil {
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handleErrorResponse(c, err)
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return
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}
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c.JSON(http.StatusAccepted, map[string]string{"call_id": model.ID})
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return
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}
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err = s.Agent.Submit(call)
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if err != nil {
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// NOTE if they cancel the request then it will stop the call (kind of cool),
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// we could filter that error out here too as right now it yells a little
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if err == context.DeadlineExceeded {
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err = models.ErrCallTimeout // 504 w/ friendly note
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}
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// NOTE: if the task wrote the headers already then this will fail to write
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// a 5xx (and log about it to us) -- that's fine (nice, even!)
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handleErrorResponse(c, err)
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return
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}
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// TODO plumb FXLB-WAIT somehow (api?)
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// TODO we need to watch the response writer and if no bytes written
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// then write a 200 at this point?
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// c.Data(http.StatusOK)
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}
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