SimpleCloudNotifier/scnserver/api/ginresp/wrapper.go
2024-06-01 00:25:56 +02:00

192 lines
5.3 KiB
Go

package ginresp
import (
scn "blackforestbytes.com/simplecloudnotifier"
"blackforestbytes.com/simplecloudnotifier/api/apierr"
"blackforestbytes.com/simplecloudnotifier/models"
"errors"
"fmt"
"github.com/gin-gonic/gin"
"github.com/mattn/go-sqlite3"
"github.com/rs/zerolog/log"
"gogs.mikescher.com/BlackForestBytes/goext/dataext"
"gogs.mikescher.com/BlackForestBytes/goext/langext"
"math/rand"
"runtime/debug"
"time"
)
type WHandlerFunc func(*gin.Context) HTTPResponse
type RequestLogAcceptor interface {
InsertRequestLog(data models.RequestLog)
}
func Wrap(rlacc RequestLogAcceptor, fn WHandlerFunc) gin.HandlerFunc {
maxRetry := scn.Conf.RequestMaxRetry
retrySleep := scn.Conf.RequestRetrySleep
return func(g *gin.Context) {
reqctx := g.Request.Context()
if g.Request.Body != nil {
g.Request.Body = dataext.NewBufferedReadCloser(g.Request.Body)
}
t0 := time.Now()
for ctr := 1; ; ctr++ {
wrap, stackTrace, panicObj := callPanicSafe(fn, g)
if panicObj != nil {
log.Error().Interface("panicObj", panicObj).Msg("Panic occured (in gin handler)")
log.Error().Msg(stackTrace)
wrap = APIError(g, 500, apierr.PANIC, "A panic occured in the HTTP handler", errors.New(fmt.Sprintf("%+v\n\n@:\n%s", panicObj, stackTrace)))
}
if g.Writer.Written() {
if scn.Conf.ReqLogEnabled {
rlacc.InsertRequestLog(createRequestLog(g, t0, ctr, nil, langext.Ptr("Writing in WrapperFunc is not supported")))
}
panic("Writing in WrapperFunc is not supported")
}
if ctr < maxRetry && isSqlite3Busy(wrap) {
log.Warn().Int("counter", ctr).Str("url", g.Request.URL.String()).Msg("Retry request (ErrBusy)")
err := resetBody(g)
if err != nil {
panic(err)
}
time.Sleep(time.Duration(int64(float64(retrySleep) * (0.5 + rand.Float64()))))
continue
}
if reqctx.Err() == nil {
if scn.Conf.ReqLogEnabled {
rlacc.InsertRequestLog(createRequestLog(g, t0, ctr, wrap, nil))
}
statuscode := wrap.Statuscode()
if statuscode/100 != 2 {
log.Warn().Str("url", g.Request.Method+"::"+g.Request.URL.String()).Msg(fmt.Sprintf("Request failed with statuscode %d", statuscode))
}
wrap.Write(g)
}
return
}
}
}
func createRequestLog(g *gin.Context, t0 time.Time, ctr int, resp HTTPResponse, panicstr *string) models.RequestLog {
t1 := time.Now()
ua := g.Request.UserAgent()
auth := g.Request.Header.Get("Authorization")
ct := g.Request.Header.Get("Content-Type")
var reqbody []byte = nil
if g.Request.Body != nil {
brcbody, err := g.Request.Body.(dataext.BufferedReadCloser).BufferedAll()
if err == nil {
reqbody = brcbody
}
}
var strreqbody *string = nil
if len(reqbody) < scn.Conf.ReqLogMaxBodySize {
strreqbody = langext.Ptr(string(reqbody))
}
var respbody *string = nil
var strrespbody *string = nil
if resp != nil {
respbody = resp.BodyString()
if respbody != nil && len(*respbody) < scn.Conf.ReqLogMaxBodySize {
strrespbody = respbody
}
}
permObj, hasPerm := g.Get("perm")
hasTok := false
if hasPerm {
hasTok = permObj.(models.PermissionSet).Token != nil
}
return models.RequestLog{
Method: g.Request.Method,
URI: g.Request.URL.String(),
UserAgent: langext.Conditional(ua == "", nil, &ua),
Authentication: langext.Conditional(auth == "", nil, &auth),
RequestBody: strreqbody,
RequestBodySize: int64(len(reqbody)),
RequestContentType: ct,
RemoteIP: g.RemoteIP(),
KeyID: langext.ConditionalFn10(hasTok, func() *models.KeyTokenID { return langext.Ptr(permObj.(models.PermissionSet).Token.KeyTokenID) }, nil),
UserID: langext.ConditionalFn10(hasTok, func() *models.UserID { return langext.Ptr(permObj.(models.PermissionSet).Token.OwnerUserID) }, nil),
Permissions: langext.ConditionalFn10(hasTok, func() *string { return langext.Ptr(permObj.(models.PermissionSet).Token.Permissions.String()) }, nil),
ResponseStatuscode: langext.ConditionalFn10(resp != nil, func() *int64 { return langext.Ptr(int64(resp.Statuscode())) }, nil),
ResponseBodySize: langext.ConditionalFn10(strrespbody != nil, func() *int64 { return langext.Ptr(int64(len(*respbody))) }, nil),
ResponseBody: strrespbody,
ResponseContentType: langext.ConditionalFn10(resp != nil, func() string { return resp.ContentType() }, ""),
RetryCount: int64(ctr),
Panicked: panicstr != nil,
PanicStr: panicstr,
ProcessingTime: t1.Sub(t0),
TimestampStart: t0,
TimestampFinish: t1,
}
}
func callPanicSafe(fn WHandlerFunc, g *gin.Context) (res HTTPResponse, stackTrace string, panicObj any) {
defer func() {
if rec := recover(); rec != nil {
res = nil
stackTrace = string(debug.Stack())
panicObj = rec
}
}()
res = fn(g)
return res, "", nil
}
func resetBody(g *gin.Context) error {
if g.Request.Body == nil {
return nil
}
err := g.Request.Body.(dataext.BufferedReadCloser).Reset()
if err != nil {
return err
}
return nil
}
func isSqlite3Busy(r HTTPResponse) bool {
if errwrap, ok := r.(*errorHTTPResponse); ok && errwrap != nil {
if errors.Is(errwrap.error, sqlite3.ErrBusy) {
return true
}
var s3err sqlite3.Error
if errors.As(errwrap.error, &s3err) {
if errors.Is(s3err.Code, sqlite3.ErrBusy) {
return true
}
}
}
return false
}