*gin.context.json get panic

[weidongbcn]

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Description

http: wrote more than the declared Content-Length /home/debian/go/pkg/mod/github.com/gin-gonic/gin@v1.6.3/render/json.go:59 (0x925946) JSON.Render: panic(err) /home/debian/go/pkg/mod/github.com/gin-gonic/gin@v1.6.3/context.go:841 (0x92c2a8) (Context).Render: if err := r.Render(c.Writer); err != nil { /home/debian/go/pkg/mod/github.com/gin-gonic/gin@v1.6.3/context.go:884 (0xb42348) (Context).JSON: c.Render(code, render.JSON{Data: obj}) /home/debian/xiehui-blog/controllers/base/baseController.go:44 (0xb42270) (BaseController).Result: bc.Ctx.JSON(http.StatusOK, Response{ /home/debian/xiehui-blog/controllers/admin/indexRestApi.go:228 (0xb42265) (IndexRestApi).GetBlogContributeCount: c.Result("success", tempMap) /home/debian/go/pkg/mod/github.com/gin-gonic/gin@v1.6.3/context.go:161 (0xb178d5) (Context).Next: c.handlersc.index /home/debian/go/pkg/mod/github.com/gin-contrib/sessions@v0.0.3/sessions.go:52 (0xb178bd) Sessions.func1: c.Next() /home/debian/go/pkg/mod/github.com/gin-gonic/gin@v1.6.3/context.go:161 (0xb2fde6) (Context).Next: c.handlersc.index /home/debian/xiehui-blog/middleware/loger.go:106 (0xb2fda5) LoggerToFile.func1: c.Next() /home/debian/go/pkg/mod/github.com/gin-gonic/gin@v1.6.3/context.go:161 (0x93be30) (Context).Next: c.handlersc.index /home/debian/go/pkg/mod/github.com/gin-gonic/gin@v1.6.3/recovery.go:83 (0x93be17) RecoveryWithWriter.func1: c.Next() /home/debian/go/pkg/mod/github.com/gin-gonic/gin@v1.6.3/context.go:161 (0x93aeb3) (Context).Next: c.handlersc.index /home/debian/go/pkg/mod/github.com/gin-gonic/gin@v1.6.3/logger.go:241 (0x93ae72) LoggerWithConfig.func1: c.Next() /home/debian/go/pkg/mod/github.com/gin-gonic/gin@v1.6.3/context.go:161 (0xb6dc75) (Context).Next: c.handlersc.index /home/debian/xiehui-blog/routers/router.go:200 (0xb6dc57) Cors2.func1: c.Next() /home/debian/go/pkg/mod/github.com/gin-gonic/gin@v1.6.3/context.go:161 (0x931fef) (Context).Next: c.handlersc.index /home/debian/go/pkg/mod/github.com/gin-gonic/gin@v1.6.3/gin.go:409 (0x931fd6) (Engine).handleHTTPRequest: c.Next() /home/debian/go/pkg/mod/github.com/gin-gonic/gin@v1.6.3/gin.go:367 (0x931a8c) (Engine).ServeHTTP: engine.handleHTTPRequest(c) /snap/go/7221/src/net/http/server.go:2887 (0x6b2982) serverHandler.ServeHTTP: handler.ServeHTTP(rw, req) /snap/go/7221/src/net/http/server.go:1952 (0x6addac) (*conn).serve: serverHandler{c.server}.ServeHTTP(w, w.req) /snap/go/7221/src/runtime/asm_amd64.s:1371 (0x46db20) goexit: BYTE $0x90 // NOP

How to reproduce

type BaseController struct {
    Ctx  *gin.Context
}

type ClassifyRestApi struct {
    BaseController
}

func (bc *ClassifyRestApi) GetList(ctx *gin.Context) {
    bc.Ctx = ctx
    var ProList []models.Product
    common.DB.Where("status=?", 1).Order("sort desc").Find(& ProList)
    bc.Ctx.JSON(http.StatusOK, gin.H{
        "Code": "code",
        "Data": ProList,
    })
}

Expectations

Environment

• go version:go version go1.13.8 linux/amd64
• gin version (or commit ref):github.com/gin-gonic/gin v1.6.3 // indirect
• operating system: Operating System: Linux Mint 20.1 Kernel: Linux 5.4.0-66-generic

[githup695535368]

me too

[TriemVo]

we got similar issue

[6cyt6]

how to solve

[hmx224]

me too, the server hangs after requesting the same interface multiple times，becase the response time of the request interface is a little longer，bug how to solve？

[danmux]

@appleboy - this can be closed since https://github.com/gin-gonic/gin/pull/2150 gives a way past this