rhi*_*use 5 templates go go-templates
我正在尝试在页面上显示切片的内容。显示带有静态文本的模板有效。一旦我尝试覆盖发送到的切片ExTpl()，我就会收到 EOF 错误。
type Miner struct {
IP string `bson:"ip"`
Port int32 `bson:"port"`
FailCount int `bson:"failcount"`
}
type (
MinerController struct {
Session *mgo.Session
}
)
func ExTpl(w http.ResponseWriter, data []Miner) {
t, _ := template.ParseFiles("templates/header.tmpl", "templates/footer.tmpl", "templates/data.tmpl")
t.ExecuteTemplate(w, "data", data)
}
func FilterMiners(c *mgo.Collection, key, value string, limit int) ([]Miner, int, error) {
var results []Miner
query := bson.M{key: value}
if len(key) == 0 {
query = nil
}
err := c.Find(query).Limit(limit).All(&results)
if err != nil {
return results, 0,errors.New("error retrieving hosts")
}
return results, len(results), nil
}
func (mc MinerController) GetSpecificMiners(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
l, err := strconv.Atoi(vars["limit"])
if err != nil {
l = 0
}
collection := Collection("miners", "NASty", mc.Session)
fleet, _ , _ := FilterMiners(collection, vars["key"], vars["value"], l)
ExTpl(w, fleet)
}
以下是有问题的模板：
头文件.tmpl
{{define "header"}}
<!DOCTYPE html>
<html>
<head>
<title></title>
<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css" rel="stylesheet">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1">
</head>
<body>
{{end}}
数据.tmpl
{{define "data"}}
{{template "header"}}
{{range .}}
{{.IP}}
{{template "footer"}}
{{end}}
页脚.tmpl
{{define "footer"}}
</body>
</html>
{{end}}
当我运行它时，我收到以下错误：
2017/10/27 12:24:56 http: panic serving [::1]:50252: template: data.tmpl:6: unexpected EOF
goroutine 49 [running]:
net/http.(*conn).serve.func1(0xc042138000)
C:/Go/src/net/http/server.go:1721 +0xd7
panic(0x7abbc0, 0xc042170360)
C:/Go/src/runtime/panic.go:489 +0x2dd
git.REDACTED.duckdns.org/REDACTED/RESTingMongo/controllers.ExTpl(0x9b7820, 0xc04211c460, 0xc042172000, 0x2, 0x2)
D:/_projects/Go/src/git.REDACTED.duckdns.org/REDACTED/RESTingMongo/controllers/handlers.go:25 +0x84
git.REDACTED.duckdns.org/REDACTED/RESTingMongo/controllers.MinerController.GetSpecificMiners(0xc04203b040, 0x9b7820, 0xc04211c460, 0xc0420f6600)
D:/_projects/Go/src/git.REDACTED.duckdns.org/REDACTED/RESTingMongo/controllers/miners.go:74 +0x2b9
git.REDACTED.duckdns.org/REDACTED/RESTingMongo/controllers.(MinerController).GetSpecificMiners-fm(0x9b7820, 0xc04211c460, 0xc0420f6600)
D:/_projects/Go/src/git.REDACTED.duckdns.org/REDACTED/RESTingMongo/routes/routes.go:33 +0x55
net/http.HandlerFunc.ServeHTTP(0xc04203f210, 0x9b7820, 0xc04211c460, 0xc0420f6600)
C:/Go/src/net/http/server.go:1942 +0x4b
git.REDACTED.duckdns.org/REDACTED/RESTingMongo/routes.Logger.func1(0x9b7820, 0xc04211c460, 0xc0420f6600)
D:/_projects/Go/src/git.REDACTED.duckdns.org/REDACTED/RESTingMongo/routes/handlers.go:12 +0x18d
net/http.HandlerFunc.ServeHTTP(0xc0420467c0, 0x9b7820, 0xc04211c460, 0xc0420f6600)
C:/Go/src/net/http/server.go:1942 +0x4b
github.com/gorilla/mux.(*Router).ServeHTTP(0xc04203c420, 0x9b7820, 0xc04211c460, 0xc0420f6600)
D:/_projects/Go/src/github.com/gorilla/mux/mux.go:133 +0x108
net/http.serverHandler.ServeHTTP(0xc04208e2c0, 0x9b7820, 0xc04211c460, 0xc042116100)
C:/Go/src/net/http/server.go:2568 +0x99
net/http.(*conn).serve(0xc042138000, 0x9b7fe0, 0xc042104280)
C:/Go/src/net/http/server.go:1825 +0x619
created by net/http.(*Server).Serve
C:/Go/src/net/http/server.go:2668 +0x2d5
我不确定发生了什么，因为我的所有模板都具有正确的格式，并且Miner结构包含一个IP字段，我应该能够在范围循环中使用.IP.
您的data模板定义无效。无论是{{define}}和{{range}}行动需要关闭{{end}}，所以它应该是：
{{define "data"}}
{{template "header"}}
{{range .}}
{{.IP}}
{{end}}
{{template "footer"}}
{{end}}
一些建议：
永远不要忽略错误，总是检查它们，至少你能做的是打印它们（你忽略template.ParseFiles()和返回的错误FilterMiners()）。
永远不要在 HTTP 处理程序中解析模板，详情参见：golang 中使用“模板”包生成动态网页给客户端需要太多时间
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