如何从GCP中的另一个Go Cloud函数调用Go Cloud函数 [英] How to call a Go Cloud Function from another Go Cloud Function in GCP

问题描述

目标:我想重用带有HTTP触发器的两个Go函数中的许多Go函数.

Goal: I want to reuse many Go functions from two Go functions with HTTP triggers.

我尝试过的方法和重现该问题的步骤:

1. 在GCP中，创建一个新的Go 1.11 Cloud Function HTTP触发器
2. 命名:MyReusableHelloWorld
3. 在function.go中，粘贴以下内容:

1. In GCP, create a new Go 1.11 Cloud Function, HTTP Trigger
2. Name it: MyReusableHelloWorld
3. In function.go, paste this:

package Potatoes

import (   
    "net/http"
)


// Potatoes return potatoes
func Potatoes(http.ResponseWriter, *http.Request) {

}

1. 在go.mod中，粘贴以下内容:module example.com/foo
2. 在要执行的函数中，粘贴以下内容:Potatoes
3. 单击部署.可以.
4. 在GCP中创建另一个Go无服务器功能
5. 在功能上.去，粘贴这个:

1. In go.mod, paste this: module example.com/foo
2. In function to execute, paste this: Potatoes
3. Click on deploy. It works.
4. Create another Go serverless function in GCP
5. In function. go, paste this:

// Package p contains an HTTP Cloud Function.
package p

import (
    "encoding/json"
    "fmt"
    "html"
    "net/http"
    "example.com/foo/Potatoes"
)

// HelloWorld prints the JSON encoded "message" field in the body
// of the request or "Hello, World!" if there isn't one.
func HelloWorld(w http.ResponseWriter, r *http.Request) {
    var d struct {
        Message string `json:"message"`
    }
    if err := json.NewDecoder(r.Body).Decode(&d); err != nil {
        fmt.Fprint(w, "error here!")
        return
    }
    if d.Message == "" {
        fmt.Fprint(w, "oh boy Hello World!")
        return
    }
    fmt.Fprint(w, html.EscapeString(d.Message))
}

1. 在go.mod中，粘贴以下内容:module example.com/foo
2. 在要执行的函数中，粘贴以下内容:HelloWorld
3. 单击部署. 它不起作用. 您遇到错误: unknown import path "example.com/foo/Potatoes": cannot find module providing package example.com/foo/Potatoes

1. In go.mod, paste this: module example.com/foo
2. In function to execute, paste this: HelloWorld
3. Click on deploy. It doesn't work. You have the error: unknown import path "example.com/foo/Potatoes": cannot find module providing package example.com/foo/Potatoes

我还尝试了各种组合来导入模块/软件包. 我尝试过没有example.com/部分.

I have also tried all kinds of combinations for the module/packages to import. I have tried without the example.com/ part.

其他较小的问题: 我想重用的功能可能全部在同一个文件中，并且实际上并不需要任何触发器，但是似乎没有触发器是不可能的.

Other smaller issue: The functions I want to reuse could all be in the same file and don't really need any trigger, but it doesn't seem that having no trigger is possible.

我无法实现目标的相关问题和文档:

1. 我如何在Go on Google Cloud Functions中使用子包?
2. https://github.com/golang/go/wiki/Modules ，go.mod部分

1. How can I use a sub-packages with Go on Google Cloud Functions?
2. https://github.com/golang/go/wiki/Modules , section go.mod

推荐答案

您不能从另一个调用云功能，因为每个功能都独立地位于其自己的容器中.

You can’t invoke a cloud function from another one, because each function is in its own container independently.

因此，如果您要部署具有无法从程序包管理器下载的依赖项的功能，则需要将代码放在一起，例如

So If you want to deploy the function with a dependency that can't be downloaded from a package manager you need to put the code together like here and deploy using the CLI

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