JSON-LD解组得到错误“ jsonld：禁用获取远程上下文”

问题描述

我正在尝试使用软件包https://godoc.org/github.com/emersion/go-jsonld来解组JSON-LD

static func commonFunction(currentController:UIViewController,dictionary: Dictionary<String,Any>) {
  currentController.getDownloadURL(email: String.getString(currentController.userDetails[JsonKeys.Kemail]),orgId: String.getString(currentController.userDetails[JsonKeys.KorganizationId]),fileId: Int.getInt(dictionary[JsonKeys.KtypeId]))
}

输出

package main

import (

    "fmt"   
    jsonld "github.com/emersion/go-jsonld"
)
func main() {

    text := `{"@context": ["http://schema.org",{ "image": { "@id": "schema:image","@type": "@id"}  }],"id": "http://www.wikidata.org/entity/Q76","type": "Person","name": "Barack Obama","givenname": "Barack","familyName": "Obama","jobTitle": "44th President of the United States","image": "https://commons.wikimedia.org/wiki/File:President_Barack_Obama.jpg"}`
    textBytes := []byte(text)
    var container interface{}
    err := jsonld.Unmarshal(textBytes,container)
    fmt.Println("Error while unmarshalling json-ld: ",err.Error())
    fmt.Println("Output: ",container)
}

我还检查了其他功能是否在与Error while unmarshalling json-ld: jsonld: fetching remote contexts is disabled Output: <nil> 相同的程序包中进行编组，但没有帮助。

解决方法

您在输入中有一个远程上下文，因此您需要按照以下方式获取它：

package main

import (
    "bytes"
    "fmt"

    jsonld "github.com/emersion/go-jsonld"
)

type person struct {
    ID    string           `jsonld:"@id"`
    Name  string           `jsonld:"name"`
    URL   *jsonld.Resource `jsonld:"url"`
    Image *jsonld.Resource `jsonld:"image"`
}

func main() {

    text := `{"@context": ["http://schema.org",{ "image": { "@id": "schema:image","@type": "@id"}  }],"id": "http://www.wikidata.org/entity/Q76","type": "Person","name": "Barack Obama","givenName": "Barack","familyName": "Obama","jobTitle": "44th President of the United States","image": "https://commons.wikimedia.org/wiki/File:President_Barack_Obama.jpg"}`
    textBytes := []byte(text)
    var container person
    dec := jsonld.NewDecoder(bytes.NewReader(textBytes))
    dec.FetchContext = func(url string) (*jsonld.Context,error) {
        var fetchedContext jsonld.Context //TODO fetch the context
        return &fetchedContext,nil
    }

    err := dec.Decode(&container)
    fmt.Println("Error while unmarshalling json-ld: ",err)
    fmt.Println("Output: ",container)
}

或在输入中提供架构。您可以参考tests作为输入和输出的示例。