为什么凌空的响应字符串中使用的编码从在响应头有什么不同

为什么凌空的响应字符串中使用的编码从在响应头有什么不同

本文介绍了为什么凌空的响应字符串中使用的编码从在响应头有什么不同?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

在做一个凌空请求(无论是 StringRequest JsonObjectRequest ),使用OkHttp栈,响应字符串的编码设置为ISO-8995-1,这是默认的编码。响应有一个标题:的content-type = text / html的;字符集= UTF-8 ,这应该被检测到。为什么不呢?

When doing a volley request (either StringRequest or JsonObjectRequest), using the OkHttp stack, the response string's encoding is set to ISO-8995-1, which is the default encoding. The response has a header: content-type=text/html; charset=utf-8, which should be detected. Why isn't it?

推荐答案

这两方面的请求类型调用 HttpHeaderParser.parseCharset ,它能够确定从标题的字符集。然而,它要求标题为内容类型,不是内容类型:它是区分大小写。 (我不知道的行为,如果使用默认HurlStack,这是可能的,这是与OkHttp栈的实现细节的差异。)

Both of those request types call HttpHeaderParser.parseCharset, which is able to determine the charset from the headers. However, it requires that the header be Content-Type, not content-type: it is case sensitive. (I'm not sure of the behavior if using the default HurlStack, it's possible this is an implementation detail difference with the OkHttp stack.)

解决方法1:复制原始请求类型,但手动覆盖字符集

Solution 1: copy the original request type, but manually override the charset

解决方法2:复制原始请求类型,但强制预计头存在

Solution 2: copy the original request type, but force the expected header to exist

import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.toolbox.HttpHeaderParser;
import com.android.volley.toolbox.JsonRequest;

import org.json.JSONException;
import org.json.JSONObject;

import java.io.UnsupportedEncodingException;

public class JsonUTF8Request extends JsonRequest<JSONObject> {
    public JsonUTF8Request(int method, String url, JSONObject jsonRequest,
                           Listener<JSONObject> listener, ErrorListener errorListener) {
        super(method, url, (jsonRequest == null) ? null : jsonRequest.toString(), listener,
                errorListener);
    }

    @Override
    protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) {
        try {
            // solution 1:
            String jsonString = new String(response.data, "UTF-8");
            // solution 2:
            response.headers.put(HTTP.CONTENT_TYPE,
                response.headers.get("content-type"));
            String jsonString = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
            //
            return Response.success(new JSONObject(jsonString),
                    HttpHeaderParser.parseCacheHeaders(response));
        } catch (UnsupportedEncodingException e) {
            return Response.error(new ParseError(e));
        } catch (JSONException je) {
            return Response.error(new ParseError(je));
        }
    }
}

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08-05 19:14