Appengine Go开发服务器找不到模板包

发布于 2024-12-10 11:08:47 字数 2327 浏览 0 评论 0原文

我正在尝试执行此处找到的 go appengine 教程，但我可以未完成导入模板库的示例。这是我正在尝试的示例代码：

package hello

import (
    "fmt"
    "http"
    "template"
)

func init() {
    http.HandleFunc("/", root)
    http.HandleFunc("/sign", sign)
}

func root(w http.ResponseWriter, r *http.Request) {
    fmt.Fprint(w, guestbookForm)
}

const guestbookForm = `
<html>
  <body>
    <form action="/sign" method="post">
      <div><textarea name="content" rows="3" cols="60"></textarea></div>
      <div><input type="submit" value="Sign Guestbook"></div>
    </form>
  </body>
</html>
`

func sign(w http.ResponseWriter, r *http.Request) {
    err := signTemplate.Execute(w, r.FormValue("content"))
    if err != nil {
        http.Error(w, err.String(), http.StatusInternalServerError)
    }
}

var signTemplate = template.MustParse(signTemplateHTML, nil)

const signTemplateHTML = `
<html>
  <body>
    <p>You wrote:</p>
    <pre>{@|html}</pre>
  </body>
</html>
`

我收到的错误是：

Compile error:
    /home/habitue/Programming/GoExamples/hello/hello.go:36: undefined: template.MustParse

我的 app.yaml 是这样的：

application: helloworld
version: 1
runtime: go
api_version: 3

handlers:
- url: /.*
  script: _go_app

我尝试修改 dev_appserver.py EXTRA_PATHS 列表以包含 Go 库的系统版本，因为我注意到 appengine lib 文件夹不包含模板库，但无济于事。这是我当前的 EXTRA_PATHS，其中我的更改是最后两个条目：

EXTRA_PATHS = [
  DIR_PATH
  ,os.path.join(DIR_PATH, 'lib', 'antlr3')
  ,os.path.join(DIR_PATH, 'lib', 'django_0_96')
  ,os.path.join(DIR_PATH, 'lib', 'fancy_urllib')
  ,os.path.join(DIR_PATH, 'lib', 'ipaddr')
  ,os.path.join(DIR_PATH, 'lib', 'protorpc')
      ,os.path.join(DIR_PATH, 'lib', 'webob')
  ,os.path.join(DIR_PATH, 'lib', 'yaml', 'lib')
  ,os.path.join(DIR_PATH, 'lib', 'simplejson')
  ,os.path.join(DIR_PATH, 'lib', 'google.appengine._internal.graphy')
  ,os.path.join('usr', 'lib', 'go', 'lib')
  ,os.path.join('usr', 'lib', 'go', 'pkg', 'linux_amd64')
]

此时，我不太确定如何继续。我似乎无法在网上找到提到类似问题的任何地方。我正在使用 64 位 Linux 版本的 appengine Go SDK，我的操作系统是 Arch Linux，如果这有帮助的话。

原文

I'm attempting to do the go appengine tutorial found here, but I can't complete the example that imports the template library. This is the example code I am trying:

package hello

import (
    "fmt"
    "http"
    "template"
)

func init() {
    http.HandleFunc("/", root)
    http.HandleFunc("/sign", sign)
}

func root(w http.ResponseWriter, r *http.Request) {
    fmt.Fprint(w, guestbookForm)
}

const guestbookForm = `
<html>
  <body>
    <form action="/sign" method="post">
      <div><textarea name="content" rows="3" cols="60"></textarea></div>
      <div><input type="submit" value="Sign Guestbook"></div>
    </form>
  </body>
</html>
`

func sign(w http.ResponseWriter, r *http.Request) {
    err := signTemplate.Execute(w, r.FormValue("content"))
    if err != nil {
        http.Error(w, err.String(), http.StatusInternalServerError)
    }
}

var signTemplate = template.MustParse(signTemplateHTML, nil)

const signTemplateHTML = `
<html>
  <body>
    <p>You wrote:</p>
    <pre>{@|html}</pre>
  </body>
</html>
`

The error I am receiving is:

Compile error:
    /home/habitue/Programming/GoExamples/hello/hello.go:36: undefined: template.MustParse

My app.yaml is this:

application: helloworld
version: 1
runtime: go
api_version: 3

handlers:
- url: /.*
  script: _go_app

I've tried modifying the dev_appserver.py EXTRA_PATHS list to include the system version of Go's libraries, since I noticed the appengine lib folder did not include a template library, but to no avail. Here is my current EXTRA_PATHSwith my changes being the last two entries:

EXTRA_PATHS = [
  DIR_PATH
  ,os.path.join(DIR_PATH, 'lib', 'antlr3')
  ,os.path.join(DIR_PATH, 'lib', 'django_0_96')
  ,os.path.join(DIR_PATH, 'lib', 'fancy_urllib')
  ,os.path.join(DIR_PATH, 'lib', 'ipaddr')
  ,os.path.join(DIR_PATH, 'lib', 'protorpc')
      ,os.path.join(DIR_PATH, 'lib', 'webob')
  ,os.path.join(DIR_PATH, 'lib', 'yaml', 'lib')
  ,os.path.join(DIR_PATH, 'lib', 'simplejson')
  ,os.path.join(DIR_PATH, 'lib', 'google.appengine._internal.graphy')
  ,os.path.join('usr', 'lib', 'go', 'lib')
  ,os.path.join('usr', 'lib', 'go', 'pkg', 'linux_amd64')
]

At this point, I'm not really sure how to proceed. I can't seem to find anywhere online that mentions a similar problem. I'm using the 64bit linux version of the appengine Go SDK, and my OS is Arch Linux, if that is any help.

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走过海棠暮 2024-12-17 11:08:47

从 SDK 1.5.5 更新开始，该示例已过时。

现在它应该看起来或多或少像这样：

package main

import (
    "fmt"
    "http"
    "template"
)

func init() {
    http.HandleFunc("/", root)
    http.HandleFunc("/sign", sign)
}

func root(w http.ResponseWriter, r *http.Request) {
    fmt.Fprint(w, guestbookForm)
}

const guestbookForm = `
<html>
 <body>
  <form action="/sign" method="post">
    <div><textarea name="content" rows="3" cols="60"></textarea></div>
    <div><input type="submit" value="Sign Guestbook"></div>
  </form>
 </body>
</html>
`

func sign(w http.ResponseWriter, r *http.Request) {
    err := signTemplate.Execute(w, r.FormValue("content"))
    if err != nil {
        http.Error(w, err.String(), http.StatusInternalServerError)
    }
}

var signTemplate = template.Must(template.New("SignIn").Parse(signTemplateHTML))

const signTemplateHTML = `
<html>
 <body>
  <p>You wrote:</p>
  <pre>{{.|html}}</pre>
 </body>
</html>`

注意调用初始化 var signTemplate 和signTemplateHTML 变量中的模板参数的区别，{{.|html}} 而不是{@|html}。

The sample is outdated starting with the SDK 1.5.5 update.

Now it should look more or less like this:

package main

import (
    "fmt"
    "http"
    "template"
)

func init() {
    http.HandleFunc("/", root)
    http.HandleFunc("/sign", sign)
}

func root(w http.ResponseWriter, r *http.Request) {
    fmt.Fprint(w, guestbookForm)
}

const guestbookForm = `
<html>
 <body>
  <form action="/sign" method="post">
    <div><textarea name="content" rows="3" cols="60"></textarea></div>
    <div><input type="submit" value="Sign Guestbook"></div>
  </form>
 </body>
</html>
`

func sign(w http.ResponseWriter, r *http.Request) {
    err := signTemplate.Execute(w, r.FormValue("content"))
    if err != nil {
        http.Error(w, err.String(), http.StatusInternalServerError)
    }
}

var signTemplate = template.Must(template.New("SignIn").Parse(signTemplateHTML))

const signTemplateHTML = `
<html>
 <body>
  <p>You wrote:</p>
  <pre>{{.|html}}</pre>
 </body>
</html>`

Notice the difference in call initializing var signTemplate and the template parameter in the signTemplateHTML variable, {{.|html}} instead of {@|html}.

回复收藏 0 原文

攒眉千度 2024-12-17 11:08:47

Go 模板包最近已被重写。尝试导入“旧/模板”。

2011-08-17（r60 的基础）

本周包含一些包重新洗牌。 http 和的用户
模板包可能会受到影响。
本周将模板包替换为 exp/template。这
原始模板包仍然可以作为 old/template 使用。这
旧的/模板包已被弃用，并将在某个时候被删除
将来。 Go 树已更新以使用新模板
包裹。我们鼓励旧模板包的用户切换到
新的。使用 template 或 exp/template 的代码需要
将其导入行分别更改为“old/template”或“template”。