👀 Views: 0 💬 Answers: 1 📅 Created: 2025-06-12

go xml unmarshal Go

I'm having a hard time understanding I'm relatively new to this, so bear with me... This might be a silly question, but I'm currently working on a Go application where I need to parse an XML document that has a complex nested structure... The XML includes optional attributes that may not always be present, and I'm using the `encoding/xml` package to unmarshal the data. Here's a sample of the XML I'm dealing with: ```xml <library> <book title="The Go Programming Language" author="Alan A. A. Donovan"> <review> <rating>5</rating> <comment>A must-read for Go developers.</comment> </review> </book> <book title="Learning Go"> <review> <rating>4</rating> </review> </book> </library> ``` I created the following struct to match the XML structure: ```go type Review struct { Rating int `xml:"rating"` Comment string `xml:"comment,omitempty"` } type Book struct { Title string `xml:"title,attr"` Author string `xml:"author,attr,omitempty"` Reviews []Review `xml:"review"` } type Library struct { Books []Book `xml:"book"` } ``` When I try to unmarshal the XML using the following code: ```go var library Library data := []byte(xmlContent) err := xml.Unmarshal(data, &library) if err != nil { log.Fatalf("behavior unmarshaling XML: %v", err) } ``` I'm receiving the following behavior message: `behavior unmarshaling XML: unexpected EOF`. I suspect it might be because of the optional attributes or the nested structures, but I'm not sure how to troubleshoot this further. I've also tried adding `omitempty` to the Author field, but it hasn’t resolved the scenario. I’ve validated the XML is well-formed, and I can parse it using online tools. What am I missing in my Go code that’s causing this unmarshaling behavior? Any insights on working with optional attributes in a nested XML structure using Go would be greatly appreciated! I'm working on a CLI tool that needs to handle this. What am I doing wrong? For context: I'm using Go on Linux. What's the best practice here? Thanks for taking the time to read this!