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自定义构建的 JSON 模式无法正确验证

来源：stackoverflow 2024-03-17 15:45:31 0浏览收藏

在自定义构建的 JSON 架构验证中遇到问题，发现它无法正确检测所有字段。即使指定了必需字段和长度限制，它也无法验证这些要求。附加属性的验证也无效。尝试使用 gojsonschema 库，但验证结果不符合预期。提供了自定义架构和 JSON 数据的示例，以说明问题。

问题内容

我有一个自定义构建的 json 架构，它只有几个顶层。这里的问题是它不能 100% 验证所有内容。例如，它只检测 4 个字段中的 2 个，并且必需的字段根本不起作用，附加属性等也不起作用。我正在将此库用于我的 json 架构。

{
    "users": {
        "put": {
          "definitions": {},
          "$schema": "http://json-schema.org/draft-07/schema#",
          "$id": "http://example.com/root.json",
          "type": "object",
          "title": "the root schema",
          "required": [
            "displayname",
            "username",
            "email",
            "password"
          ],
          "properties": {
            "displayname": {
              "$id": "#/properties/displayname",
              "type": "string",
              "title": "the displayname schema",
              "default": "",
              "examples": [
                ""
              ],
              "minlength": 3,
              "maxlength": 24,
              "pattern": "^(.*)$"
            },
            "username": {
              "$id": "#/properties/username",
              "type": "string",
              "title": "the username schema",
              "default": "",
              "examples": [
                ""
              ],
              "minlength": 3,
              "maxlength": 15,
              "pattern": "^(.*)$"
            },
            "email": {
              "$id": "#/properties/email",
              "type": "string",
              "title": "the email schema",
              "default": "",
              "examples": [
                ""
              ],
              "minlength": 7,
              "pattern": "^(.*)$",
              "format": "email"
            },
            "password": {
              "$id": "#/properties/password",
              "type": "string",
              "title": "the password schema",
              "default": "",
              "examples": [
                ""
              ],
              "pattern": "^(.*)$"
            }
        },
        "additionalproperties": false
        }
    }
}

我正在解析这样的所有内容：

func validate(data interface{}, r *http.request) (interface{}, error) {
    // convert the data struct to a readable json bytes
    jsonparams, err := json.marshal(data)
    if err != nil {
        return nil, err
    }

    // split url segments so we know what part of the api they are accessing
    modules := strings.split(r.url.string(), "/")
    modules = modules[(len(modules) - 1):]

    // read the schema file
    fileschema, _ := ioutil.readfile("config/schema/schema.json")
    var object interface{}

    // unmarshal it so we can choose what schema we specifically want
    err = json.unmarshal(fileschema, &object)
    if err != nil {
        log.fatal(err)
    }

    // choose the preferred schema
    encodedjson, err := json.marshal(object.(map[string]interface{})[strings.join(modules, "") + "s"].(map[string]interface{})[r.method])
    if err != nil {
        log.fatal(err)
    }

    // load the json schema
    schema := gojsonschema.newstringloader(string(encodedjson))

    // load the json params
    document := gojsonschema.newstringloader(string(jsonparams))

    // validate the document
    result, err := gojsonschema.validate(schema, document)
    if err != nil {
        return nil, err
    }

    if !result.valid() {
        // map the errors into a new array
        var errors = make(map[string]string)
        for _, err := range result.errors() {
            errors[err.field()] = err.description()
        }

        // convert the array to an interface that we can convert to json
        resultmap := map[string]interface{}{
            "success": false,
            "result": map[string]interface{}{},
            "errors": errors,
        }

        // convert the interface to a json object
        errorobject, err := json.marshal(resultmap)
        if err != nil {
            return nil, err
        }

        return errorobject, nil
    }

    return nil, nil
}

type createparams struct {
    displayname     string
    username        string
    email           string
    password        string
}

var (
    response interface{}
    status int = 0
)

func create(w http.responsewriter, r *http.request) {
    status = 0

    // parse the request so we can access the query parameters
    r.parseform()

    // assign them to the interface variables
    data := &createparams{
        displayname: r.form.get("displayname"),
        username: r.form.get("username"),
        email: r.form.get("email"),
        password: r.form.get("password"),
    }

    // validate the json data
    errors, err := schema.validate(data, r)

    if err != nil {
        responsejson  := map[string]interface{}{
            "success": false,
            "result": map[string]interface{}{},
        }

        log.fatal(err.error())

        response, err = json.marshal(responsejson)
        status = http.statusinternalservererror
    }

    // catch any errors generated by the validator and assign them to the response interface
    if errors != nil {
        response = errors
        status = http.statusbadrequest
    }

    // status has not been set yet, so it's safe to assume that everything went fine
    if status == 0 {
        responsejson  := map[string]interface{}{
            "success": true,
            "result": map[string]interface{} {
                "displayname": data.displayname,
                "username": data.username,
                "email": data.email,
                "password": nil,
            },
        }

        response, err = json.marshal(responsejson)
        status = http.statusok
    }

    // we are going to respond with json, so set the appropriate header
    w.header().set("content-type", "application/json")

    // write the header and the response
    w.writeheader(status)
    w.write(response.([]byte))
}

我这样做的原因是我正在构建一个 rest api，如果 api/auth/user 收到 put 请求，我希望能够专门为“用户”指定数据要求使用 put 方法零件。

知道如何实现这一目标吗？

编辑： 我的 json 数据：

{
  "displayname": "1234",
  "username": "1234",
  "email": "[email protected]",
  "password": "123456"
}

编辑2： 此数据应该因架构而失败。

{
  "DisplayName": "1", // min length is 3
  "Username": "", // this field is required but is empty here
  "Email": "testgmail.com", // not following the email format
  "Password": "123456111111111111111111111111111111111111111111111" // too long
}