Here are a few title options, leaning into the question format: **Short & Direct:** * **Go: How Do I Detect Additional MIME Types Beyond the Standard Library?** * **Which Go Package is Best for

Here are a few title options, leaning into the question format: Short & Direct: * Go: How Do I Detect Additional MIME Types Beyond the Standard Library? * **Which Go Package is Best for

Mary-Kate Olsen

Oct 25, 2024 am 09:29 AM

Here are a few title options, leaning into the question format:

**Short & Direct:**

* **Go: How Do I Detect Additional MIME Types Beyond the Standard Library?**
* **Which Go Package is Best for Detecting MIME Types?**

**Slightly Longer & More Specific

Detecting Additional Mime Types in Go

The standard http.DetectContentType() function in Go's net/http package provides support for a limited number of mime types. However, the need arises to identify additional file types, particularly those with non-extension-based signatures.

Challenges

Detecting mime types purely by content can be complex, especially for files that share a common signature. For example, docx/xlsx/pptx/odp/odt files share the zip file signature (50 4B 03 04).

Solutions

Since the initial question was posed three years ago, several packages have emerged to address this challenge:

1. filetype

Pure Go implementation with easy extension capabilities
Limited number of supported mime types
Issues identifying files matching multiple mime types

2. magicmime

Requires libmagic-dev installation
Supports the most comprehensive range of mime types
Extension possible, but more complex
Libmagic is not thread-safe

3. mimetype

Pure Go with thread-safe functionality
More supported mime types than filetype
Extensible
Community-maintained and actively updated

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