go 在安装echo框架的时候报https fetch failed: Get https://golang.org/x/crypto/acme/autocert?go-get=1: dial tcp

在尝试安装Go的Echo框架时，遇到了因网络问题导致的HTTPS访问失败，具体表现为golang.org/x/crypto和golang.org/x/net等依赖包下载时的TCP i/o超时。尽管如此，在main.go文件中仍然使用了echo.New()，但启动后报错，需要通过错误信息逐步解决依赖下载问题。

下面是安装的时候报错信息

package golang.org/x/crypto/acme imports golang.org/x/crypto/acme Fetching https://golang.org/x/crypto/acme/autocert?go-get=1 https fetch failed: Get https://golang.org/x/crypto/acme/autocert?go-get=1: dial tcp 216.239.37.1:443: i/o timeout package golang.org/x/crypto/acme/autocert: unrecognized import path "golang.org/x/crypto/acme/autocert" (https fetch: Get https://golang.org/x/crypto/acme/autocert?go-get=1: dial tcp 216.239.37.1:443: i/o timeout) Fetching https://golang.org/x/net/http2?go-get=1 https fetch failed: Get https://golang.org/x/net/http2?go-get=1: dial tcp 216.239.37.1:443: i/o timeout golang.org/x/net/http2 (download) package golang.org/x/net/http2: no Go files in /Users/user/hzl/webroot/gowork/src/golang.org/x/net/http2 Fetching https://golang.org/x/net/http2/h2c?go-get=1 https fetch failed: Get https://golang.org/x/net/http2/h2c?go-get=1: dial tcp 216.239.37.1:443: i/o timeout package golang.org/x/net/http2/h2c: unrecognized import path "golang.org/x/net/http2/h2c" (https fetch: Get https://golang.org/x/net/http2/h2c?go-get=1: dial tcp 216.239.37.1:443: i/o timeout) package io/ioutil: unrecognized import path "io/ioutil" (import path does not begin with hostname) package log: unrecognized import path "log" (import path does not begin with hostname) package mime/multipart: unrecognized import path "mime/multipart" (import path does not begin with hostname) package net: unrecognized import path "net" (import path does not begin with hostname)

这个就是咱们不能上墙导致下载不了组件所产生的问题，不过我在main.go里面还是写了echo.New()代码如下

package main

import (
"fmt"

//"golang.org/labstack/echo"
"github.com/labstack/echo"
)

func main() {
echo.New()
fmt.Println()
}

启动后肯定报错，产生好多错误，不过可以从错误结果中找到问题，一个一个慢慢解决。

import cycle not allowed
    package main
    imports github.com/labstack/echo
    imports golang.org/x/crypto/acme
    imports golang.org/x/crypto/acme
    src/github.com/labstack/echo/echo.go:61:2: cannot find package "golang.org/x/crypto/acme/autocert" in any of:
    /usr/local/opt/go@1.12/libexec/src/golang.org/x/crypto/acme/autocert (from $GOROOT)
    /Users/user/hzl/webroot/gowork/src/golang.org/x/crypto/acme/autocert (from $GOPATH)
    src/github.com/labstack/echo/echo.go:62:2: no Go files in /usr/local/opt/go@1.12/libexec/src/golang.org/x/net/http2
    src/github.com/labstack/echo/echo.go:63:2: cannot find package "golang.org/x/net/http2/h2c" in any of:
    /usr/local/opt/go@1.12/libexec/src/golang.org/x/net/http2/h2c (from $GOROOT)
    /Users/user/hzl/webroot/gowork/src/golang.org/x/net/http2/h2c (from $GOPATH)
大家可以去https://github.com/golang/xxx下载到所缺的文件在跟目录创建golang.org文件夹然后根据 https://golang.org/x/crypto/acme/autocert安装时的错误路径放文件，再启动就OK啦。成功了
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