What to do if golang module download fails

When I use golang programming recently, I sometimes encounter the problem that the module cannot be downloaded. If you have also encountered this problem, then this article will provide you with some solutions.

First of all, we need to understand that there are two ways to download modules in golang: go get and go mod. Among them, go get is an original way, which will get the code from the specified VCS repository (such as GitHub, Bitbucket, etc.) and place it in the correct location through the GOPATH environment variable. And go mod is a relatively new way that uses specified go.mod files to describe project dependencies and does not require setting the GOPATH environment variable. Here, we mainly focus on the issue of downloading modules using the go mod method.

When we use go mod to download modules, sometimes we find that some modules fail to download and the following error message appears:

go: downloading github.com/xxxxx: go: downloading github.com/xxxxx v0.1.0
go: downloading github.com/xxxxx v0.1.0: unrecognized import path "github.com/xxxxx" (parse https://github.com/xxxxx?go-get=1: no go-import meta tags ())

This error message means, go mod The module's import path was not recognized. This may be due to the module not being marked as stable in the VCS repository.

Solution 1: Mark the module as a stable version

In the VCS repository, we can mark the stable version of a project through tag or release. If our module is not marked as stable, then go mod cannot download it. Therefore, you first need to check whether the stable version of the module has been marked. If not, we need to manually label the module with a stable version or issue a stable release.

Solution 2: Use a temporary proxy

If the module's VCS repository cannot be accessed normally (such as being blocked), we can use a temporary proxy to download the module. In this case, we can use the GOPROXY environment variable to set the proxy server as follows:

export GOPROXY=https://goproxy.io

This setup will use goproxy.io as a temporary proxy server for downloading our module.

In addition to goproxy.io, there are many other proxy servers that can be used, such as sum.golang.org, goproxy.cn, etc. If we encounter the problem of not being able to access the VCS repository, using a temporary proxy is a good solution.

Solution 3: Check the network connection

If there is a problem with our network connection, then go mod may also be unable to download the module. Therefore, we need to ensure that the network connection is normal and check whether there are network problems such as proxy.

Summary

Whether we use go get or go mod to download the module, we may encounter download failure problems. In this case, we can solve the problem by marking the module as stable, using a temporary proxy, or checking the network connection. Hope these solutions can help you.

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