echo安装失败，提示unrecognized import path "golang.org/x

echo安装失败，提示unrecognized import path "golang.org/x/crypto/acme/autocert"?

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C:UsersHOORI>go get github.com/labstack/echo

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: connectex: A connection attempt failed because the connected party did not properly respond after a period of time,or established connection failed because connected host has failed to respond.)

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https://github.com/golang/crypto下载crypto-master.zip文件，go安装目录在C:go ，创建文件夹C:Gosrcgolang.orgx ，在把crypto-master.zip文件复制到x目录下，解压crypto-master.zip，把解压后的文件夹重新命名为crypto。

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在重新执行命令: go get github.com/labstack/echo