意外的响应代码 403但在浏览器中工作正常

如何解决意外的响应代码 403但在浏览器中工作正常

我正在尝试从以下 URL 获取 json 数据

https://newsapi.org/v2/everything?q=tesla&from=2021-05-07&sortBy=publishedAt&apiKey=c9e4ed47388d413c8af23fc46a330f8e

但是当我运行应用程序时它会显示

31029-31125 E/Volley: [228776] NetworkUtility.shouldRetryException: Unexpected response code 403 for https://newsapi.org/v2/everything?q=tesla&from=2021-02-23&sortBy=publishedAt&apiK 20ey=c9e4ed47388d413c8af23fc46a330f8e
31029-31125 E/Volley: [228776] NetworkUtility.shouldRetryException: Unexpected response code 403 for https://newsapi.org/v2/everything?q=tesla&from=2021-02-23&sortBy=publishedAt&apiK 20ey=c9e4ed47388d413c8af23fc46a330f8e

但是当我在 chrome 浏览器中输入 URL 时，它会正常显示 json 数据，但我在我的应用程序中得到了同样的东西 这是我在 kotlin 中的代码

fun getNews(context: Context){
    var queue: RequestQueue = Volley.newRequestQueue(context)
    val url = "https://newsapi.org/v2/everything?q=tesla&from=2021-05-07&sortBy=publishedAt&apiKey=c9e4ed47388d413c8af23fc46a330f8e"
    val request = JsonObjectRequest(
        Request.Method.GET,url,null,{ response ->
            var list: MutableList<newModel> = mutablelistof<newModel>()
            try {
                var rootArray: JSONArray = response.getJSONArray("articles")
                for(i in 0 until response.length()){
                    var dataObject: JSONObject = rootArray.get(i) as JSONObject
                    list.add(newModel(dataObject.getString("urlToImage"),dataObject.getString("title"),dataObject.getString("description"),dataObject.getString("url")))
                }

            } catch (e: Exception) {
                Toast.makeText(
                    context,"error while parsing the jsonObject/array",Toast.LENGTH_LONG
                ).show()
            }
            callBack.gottheNewsData(list)
        }) { error ->
        Toast.makeText(context,"Error in responce",Toast.LENGTH_SHORT).show()
    }
    queue.add(request)
}

解决方法

我遇到了同样的错误，我通过向请求传递标头 "Mozilla/5.0" 解决了这个问题。

这可以在您的代码上以这种方式完成。

fun getNews(context: Context){
var queue: RequestQueue = Volley.newRequestQueue(context)
val url = "Your URL here"

val request = object: JsonObjectRequest(
    Request.Method.GET,url,null,{ response ->
        var list: MutableList<newModel> = mutableListOf<newModel>()
        try {
            var rootArray: JSONArray = response.getJSONArray("articles")
            for(i in 0 until response.length()){
                var dataObject: JSONObject = rootArray.get(i) as JSONObject
                list.add(newModel(dataObject.getString("urlToImage"),dataObject.getString("title"),dataObject.getString("description"),dataObject.getString("url")))
            }

        } catch (e: Exception) {
            Toast.makeText(
                context,"error while parsing the jsonObject/array",Toast.LENGTH_LONG
            ).show()
        }
        callBack.gotTheNewsData(list)
    }) { error ->
    Toast.makeText(context,"Error in responce",Toast.LENGTH_SHORT).show()
}

// overriding function to add Headers.
{
    override fun getHeaders(): MutableMap<String,String> {
        val headers = HashMap<String,String>()
        headers["User-Agent"]="Mozilla/5.0"
        return headers
    }
}

queue.add(request)
}

在构造请求之前使用 object 关键字很重要，以便能够覆盖 getHeaders() 方法。

This answer 帮助我在使用 kotlin 的 Volley 请求中添加自定义标头。