125 lines
3.2 KiB
Go
125 lines
3.2 KiB
Go
package ginext
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import (
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"context"
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"errors"
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"fmt"
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"github.com/gin-gonic/gin"
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"github.com/gin-gonic/gin/binding"
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"github.com/rs/zerolog/log"
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"gogs.mikescher.com/BlackForestBytes/goext/ginext/commonapierr"
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"gogs.mikescher.com/BlackForestBytes/goext/langext"
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"runtime/debug"
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)
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type WHandlerFunc func(PreContext) HTTPResponse
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func Wrap(w *GinWrapper, fn WHandlerFunc) gin.HandlerFunc {
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return func(g *gin.Context) {
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g.Set("__returnRawErrors", w.returnRawErrors)
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reqctx := g.Request.Context()
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wrap, stackTrace, panicObj := callPanicSafe(fn, PreContext{wrapper: w, ginCtx: g})
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if panicObj != nil {
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fmt.Printf("\n======== ======== STACKTRACE ======== ========\n%s\n======== ======== ======== ========\n\n", stackTrace)
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log.Error().
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Interface("panicObj", panicObj).
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Str("trace", stackTrace).
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Msg("Panic occured (in gin handler)")
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wrap = APIError(g, commonapierr.Panic, "A panic occured in the HTTP handler", errors.New(fmt.Sprintf("%+v", panicObj)))
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}
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if g.Writer.Written() {
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panic("Writing in WrapperFunc is not supported")
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}
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if reqctx.Err() == nil {
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wrap.Write(g)
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}
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}
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}
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type PreContext struct {
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ginCtx *gin.Context
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wrapper *GinWrapper
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uri any
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query any
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body any
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form any
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}
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func (pctx *PreContext) URI(uri any) *PreContext {
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pctx.uri = uri
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return pctx
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}
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func (pctx *PreContext) Query(query any) *PreContext {
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pctx.query = query
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return pctx
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}
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func (pctx *PreContext) Body(body any) *PreContext {
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pctx.body = body
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return pctx
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}
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func (pctx *PreContext) Form(form any) *PreContext {
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pctx.form = form
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return pctx
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}
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func (pctx PreContext) Start() (*AppContext, *HTTPResponse) {
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if pctx.uri != nil {
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if err := pctx.ginCtx.ShouldBindUri(pctx.uri); err != nil {
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return nil, langext.Ptr(APIError(pctx.ginCtx, commonapierr.BindFailURI, "Failed to read uri", err))
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}
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}
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if pctx.query != nil {
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if err := pctx.ginCtx.ShouldBindQuery(pctx.query); err != nil {
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return nil, langext.Ptr(APIError(pctx.ginCtx, commonapierr.BindFailQuery, "Failed to read query", err))
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}
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}
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if pctx.body != nil {
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if pctx.ginCtx.ContentType() == "application/json" {
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if err := pctx.ginCtx.ShouldBindJSON(pctx.body); err != nil {
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return nil, langext.Ptr(APIError(pctx.ginCtx, commonapierr.BindFailJSON, "Failed to read body", err))
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}
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} else {
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return nil, langext.Ptr(APIError(pctx.ginCtx, commonapierr.BindFailJSON, "missing JSON body", nil))
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}
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}
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if pctx.form != nil {
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if pctx.ginCtx.ContentType() == "multipart/form-data" {
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if err := pctx.ginCtx.ShouldBindWith(pctx.form, binding.Form); err != nil {
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return nil, langext.Ptr(APIError(pctx.ginCtx, commonapierr.BindFailFormData, "Failed to read multipart-form", err))
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}
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} else {
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return nil, langext.Ptr(APIError(pctx.ginCtx, commonapierr.BindFailJSON, "missing form body", nil))
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}
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}
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ictx, cancel := context.WithTimeout(context.Background(), pctx.wrapper.requestTimeout)
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actx := CreateAppContext(pctx.ginCtx, ictx, cancel)
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return actx, nil
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}
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func callPanicSafe(fn WHandlerFunc, pctx PreContext) (res HTTPResponse, stackTrace string, panicObj any) {
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defer func() {
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if rec := recover(); rec != nil {
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res = nil
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stackTrace = string(debug.Stack())
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panicObj = rec
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}
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}()
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res = fn(pctx)
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return res, "", nil
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}
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