How to Fix Go Module Proxy and Download Errors

In this tutorial, you'll learn about How to Fix Go Module Proxy and Download Errors. We cover key concepts, practical examples, and best practices.

Go module proxy errors like 410 gone or dial tcp: timeout occur when the Go module proxy (proxy.golang.org) does not have the requested module version, the module is private, or the proxy is unreachable due to network restrictions.

Quick Fix

Wrong

go get example.com/private/module@v1.0.0

go: example.com/private/module@v1.0.0: reading
https://proxy.golang.org/example.com/private/module/@v/v1.0.0.info: 410 Gone

The proxy does not have access to the private module.

Right

# Set GOPROXY to direct for private modules
GOPROXY=direct go get example.com/private/module@v1.0.0

Fix with GOPRIVATE

# Configure private module patterns
go env -w GOPRIVATE=example.com/*,internal.company.com/*
go env -w GONOSUMCHECK=example.com/*,internal.company.com/*
go env -w GONOSUMDB=example.com/*,internal.company.com/*

Fix proxy timeout

# Use a different proxy or skip proxy
go env -w GOPROXY=https://goproxy.io,direct

# Or disable proxy entirely
go env -w GOPROXY=off

Fix checksum mismatch

# Set GONOSUMCHECK for private modules
go env -w GONOSUMCHECK=*.example.com/*

# Or clear the checksum database for a specific module
go clean -modcache
go mod download

Prevention

• Configure GOPRIVATE for all private module patterns.
• Use GONOSUMCHECK and GONOSUMDB alongside GOPRIVATE.
• Set up a private Go module proxy (Athens, Artifactory, or GoCenter) for enterprise use.
• Use vendor mode (go mod vendor) for build reproducibility.
• Pin dependencies with go mod tidy -go=1.x for consistent builds.

DodaTech Tools

Doda Browser's Go module manager validates go.mod and go.sum files, checks proxy connectivity, and resolves version conflicts. DodaZIP bundles module caches for offline builds. Durga Antivirus Pro scans downloaded modules for known vulnerabilities.

Common Mistakes with module proxy

1. Placing the wildcard pattern first in case expressions, making all subsequent patterns unreachable
2. Using head and tail instead of pattern matching, causing runtime errors on empty lists
3. Forgetting that lazy evaluation defers computation until the value is forced, causing space leaks with unevaluated thunks

These mistakes appear frequently in real-world GO code. DodaTech's contributors have identified these patterns through analysis of open-source projects and production systems.

Practice Exercise

Write a pure function that safely divides two integers using Maybe, then test it with edge cases like division by zero and negative numbers.

This exercise reinforces the concepts covered in this guide. Try implementing it before checking online solutions.

FAQ