Is it possible to use GoQuery for XML parsing?

Yes, GoQuery can be used for parsing XML, but with some limitations. GoQuery is a library for Go (Golang) that provides a set of features to traverse and manipulate HTML documents, inspired by jQuery. Although it is primarily designed for HTML, it can be used for XML documents as long as the XML structure is compatible with HTML parsing rules.

The limitation arises because XML can have structures that are not valid in HTML, such as self-closing tags without a slash, multiple root elements, and case-sensitive tags. GoQuery expects the input to follow the rules of HTML, which is case-insensitive and has a specific set of allowed elements and attributes.

However, if your XML is XHTML or follows a structure similar to HTML, you could use GoQuery to parse and manipulate it. Below is an example of how you might use GoQuery to parse a simple XML document:

package main

import (
    "bytes"
    "fmt"
    "log"

    "github.com/PuerkitoBio/goquery"
)

func main() {
    // Sample XML input
    xml := `
    <?xml version="1.0" encoding="UTF-8"?>
    <catalog>
       <book id="bk101">
          <author>Gambardella, Matthew</author>
          <title>XML Developer's Guide</title>
          <genre>Computer</genre>
          <price>44.95</price>
          <publish_date>2000-10-01</publish_date>
       </book>
       <book id="bk102">
          <author>Ralls, Kim</author>
          <title>Midnight Rain</title>
          <genre>Fantasy</genre>
          <price>5.95</price>
          <publish_date>2000-12-16</publish_date>
       </book>
    </catalog>
    `

    // Use NewDocumentFromReader to parse the XML
    doc, err := goquery.NewDocumentFromReader(bytes.NewReader([]byte(xml)))
    if err != nil {
        log.Fatal(err)
    }

    // Find each book element and print the author and title
    doc.Find("catalog > book").Each(func(i int, s *goquery.Selection) {
        author := s.Find("author").Text()
        title := s.Find("title").Text()
        fmt.Printf("Book %d: %s - %s\n", i+1, author, title)
    })
}

In this example, the XML is structured similarly to HTML, and we're using GoQuery's Find method to locate elements in the XML document. If you have XML that doesn't follow the structure of HTML, you may want to use a different library that is specifically designed for XML parsing, such as encoding/xml in Go's standard library.

Here's a brief example of using Go's encoding/xml package to parse XML:

package main

import (
    "encoding/xml"
    "fmt"
    "log"
    "strings"
)

type Book struct {
    ID           string `xml:"id,attr"`
    Author       string `xml:"author"`
    Title        string `xml:"title"`
    Genre        string `xml:"genre"`
    Price        string `xml:"price"`
    PublishDate  string `xml:"publish_date"`
}

type Catalog struct {
    XMLName xml.Name `xml:"catalog"`
    Books   []Book   `xml:"book"`
}

func main() {
    // Sample XML input
    xmlData := `
    <?xml version="1.0" encoding="UTF-8"?>
    <catalog>
       <book id="bk101">
          <author>Gambardella, Matthew</author>
          <title>XML Developer's Guide</title>
          <genre>Computer</genre>
          <price>44.95</price>
          <publish_date>2000-10-01</publish_date>
       </book>
       <!-- More book elements -->
    </catalog>
    `

    // Parse the XML into our Catalog struct
    var catalog Catalog
    err := xml.Unmarshal([]byte(xmlData), &catalog)
    if err != nil {
        log.Fatal(err)
    }

    // Iterate over the books and print details
    for _, book := range catalog.Books {
        fmt.Printf("Book ID: %s\nAuthor: %s\nTitle: %s\n\n", book.ID, book.Author, book.Title)
    }
}

In this second example, we define Go structs that map to the XML structure and use the xml.Unmarshal function to parse the XML data into these structs. This is a more XML-centric approach and will handle XML nuances better than GoQuery.