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Problems with gin template rendering #912

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5455230 opened this issue Jan 22, 2025 · 5 comments
Open

Problems with gin template rendering #912

5455230 opened this issue Jan 22, 2025 · 5 comments

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@5455230
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5455230 commented Jan 22, 2025 •
edited
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What version of Garble and Go are you using?

garble version:
mvdan.cc/garble v0.13.0
Build settings:
      -buildmode exe
       -compiler gc
     CGO_ENABLED 1
          GOARCH amd64
            GOOS windows
         GOAMD64 v1

go version:
go version go1.22.5 windows/amd64

What did you do?
[]Item list,iii cannot be printed.

        {{range $value := .iii}}
            value: {{$value.Size}}
        {{end}}

garble build -mod=vendor -o bin/go_go.exe main.go

/main.go

package main

import (
	"net/http"
	"github.com/gin-gonic/gin"
)

type Item struct {
	Page int
	Size int
}

func main() {
	r := gin.Default()
	r.LoadHTMLGlob("templates/*")
	r.GET("/index", func(c *gin.Context) {
		a := gin.H{
			"title": "titleAA",
			"ce":    "123456",
			"iii": []Item{
				{Page: 1, Size: 11},
				{Page: 2, Size: 12},
				{Page: 3, Size: 13},
			},
		}
		c.HTML(http.StatusOK, "index.html", a)
	})
	r.Run()
}

/templates/index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <title>{{.title}}</title>
</head>
    <body>
        iii:
        {{range $value := .iii}}
            value: {{$value.Size}}
        {{end}}
    </body>
</html>

GET:http://127.0.0.1:8080/index
Error #01: template: index.html:9:27: executing "index.html" at <$value.Size>: can't evaluate field Size in type main.B0aMZmq6
@5455230
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5455230 commented Jan 22, 2025 •
edited
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/main.go

"iii": Item{Page: 1, Size: 11}

/templates/index.html

{{.iii.Size}}

struct{} writing methods can be rendered successfully.

Error with []struct{} type in gin template rendering.

@lu4p
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lu4p commented Jan 22, 2025

This is likely fixed in master:

go install mvdan.cc/garble@master

@5455230
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5455230 commented Jan 23, 2025 •
edited
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This is likely fixed in master:

go install mvdan.cc/garble@master

go install mvdan.cc/garble@master
OR
go get -u mvdan.cc/garble@master

What version of Garble and Go are you using?

garble version:
mvdan.cc/garble v0.13.1-0.20250119141355-97833204f8f2
Build settings:
      -buildmode exe
       -compiler gc
     CGO_ENABLED 1
          GOARCH amd64
            GOOS windows
         GOAMD64 v1

go version:
go version go1.23.5 windows/amd64

go.mod:
mvdan.cc/garble v0.13.1-0.20250119141355-97833204f8f2
go.sum:

mvdan.cc/garble v0.13.1-0.20250119141355-97833204f8f2 h1:KbpHDqitrM8UW68FcQ3ehobmldqmyLjmuZkwO82xva0=
mvdan.cc/garble v0.13.1-0.20250119141355-97833204f8f2/go.mod h1:QOG7wThB5kAQhih4m93Sk1kjiGT8pgcEvWi/+VTWEn0=

Go->cmd:
SET CGO_ENABLED=0 && SET GOOS=windows && SET GOARCH=amd64 && garble build -o bin/go_go.exe main.go

GET:http://127.0.0.1:8080/index
Error #1: template: index.html:9:27: executing "index.html" at <$value.Size>: can't evaluate field Size in type main.ORh2JaE4Gpg8

I seem to have found some clues (not sure).

iii := map[string]interface{}{"Page": 1, "Size": "11"}
fmt.Println(fmt.Printf("%+v", iii)) //map[Page:1 Size:11]

OR

iii := []map[string]interface{}{
	{"Page": 1, "Size": "11"},
	{"Page": 2, "Size": "12"},
	{"Page": 3, "Size": "13"},
}
fmt.Println(fmt.Printf("%+v", iii)) //[map[Page:1 Size:11] map[Page:2 Size:12] map[Page:3 Size:13]]

any and interface{} Obfuscation was not successfully performed.

Error #01: template: index.html:9:27: executing "index.html" at <$value.Size>: can't evaluate field Size in type main.B0aMZmq6

The reason for the error is that []Item{} liststruct has successfully executed the code confusion, but template: index.html:9:27 fails to correspond to the variable name after confusion.
(But I personally have no ability to repair this problem,sorry)

@lu4p
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lu4p commented Jan 23, 2025

Can you share a full example to reproduce this?

@5455230
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5455230 commented Jan 23, 2025

Can you share a full example to reproduce this?

The complete file example is at the beginning of the post, with only two files (/main.go and /templates/index.html)

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@lu4p @5455230