阻止Volley发送缓存标题 [英] Stop Volley from sending cache headers

问题描述

Volley继续发送 If-Modified-Since 标题。

我需要停止发送此标题因为它不断与来自第三方服务器的响应混淆。

解决方案

更新：

$ b如何停止发送缓存标头？
$ b

在 BasicNetwork.java 中，您会发现

  private void addCacheHeaders（Map< String，String> headers，Cache.Entry entry）{
 //如果没有缓存条目，我们就完成了。 
 if（entry == null）{
 return; 
 
 
 if（entry.etag！= null）{
 headers.put（If-None-Match，entry.etag）; 
} 
 
 if（entry.lastModified> 0）{
 Date refTime = new Date（entry.lastModified）; 
 headers.put（If-Modified-Since，DateUtils.formatDate（refTime））; 
 
 
 
 
 $ b $ p 
 
因此我认为你可以尝试以下方法之一： 
 
 
 
调用 setShouldCache（false）; ，例如： jsonObjectRequest.setShouldCache（false）;  
 
 
 
创建一个自定义的 BasicNetwork 您将覆盖 performRequest 并设置 Cache.Entry 变量null或 entry.lastModified< = 0 ，可以尝试以下操作： 
 
 
  BasicNetwork basicNetwork = new BasicNetwork（hurlStack）{
 @Override 
 public NetworkResponse performRequest（Request<> request）throws VolleyError {
 request.setCacheEntry（null）; 
 // request.setShouldCache（false）; 
返回super.performRequest（request）; 
} 
}; 
  
 
 
 
 
 
 
  END OF UPDATE  
 
 
 
您需要重写 getHeaders 方法，您可以尝试以下两种方法之一：
  @Override 
 public Map< String，String> getHeaders（）抛出AuthFailureError {
 Map< String，String> headerMap = super.getHeaders（）; 
 if（headerMap.containsKey（If-Modified-Since））{
 headerMap.remove（If-Modified-Since）; 
} 
返回headerMap; 
} 
  
或
  @Override 
 public Map< String，String> getHeaders（）抛出AuthFailureError {
 Map< String，String> headerMap = new HashMap<>（）; 
 headerMap.put（Content-Type，application / json）; 
 // ... 
 //headerMap.put（其他键，其他值）; 
 // ... 
返回headerMap; 
} 
  
希望这有助于您！
 
Volley keeps sending If-Modified-Since header.

I need to stop volley from sending this header because it keeps messing with a response from a third party server. How do I stop volley from sending cache headers?
解决方案
UPDATE:

In BasicNetwork.java, you will find
private void addCacheHeaders(Map<String, String> headers, Cache.Entry entry) {
        // If there's no cache entry, we're done.
        if (entry == null) {
            return;
        }

    if (entry.etag != null) {
        headers.put("If-None-Match", entry.etag);
    }

    if (entry.lastModified > 0) {
        Date refTime = new Date(entry.lastModified);
        headers.put("If-Modified-Since", DateUtils.formatDate(refTime));
    }
}
So I think you can try one of the following ways:


Call setShouldCache(false);, for example: jsonObjectRequest.setShouldCache(false);
Create a custom BasicNetwork variable, in which you will override performRequest and set Cache.Entry variable null or entry.lastModified <= 0, can try the following:
     BasicNetwork basicNetwork = new BasicNetwork(hurlStack) {
         @Override
         public NetworkResponse performRequest(Request<?> request) throws VolleyError {
             request.setCacheEntry(null);
             // request.setShouldCache(false);
             return super.performRequest(request);
        }
     };



END OF UPDATE

IMO you need to override getHeaders method, you can try one of the two following ways:
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            Map<String, String> headerMap = super.getHeaders();
            if (headerMap.containsKey("If-Modified-Since")) {
                headerMap.remove("If-Modified-Since");
            }
            return headerMap;
        }
or
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
             Map<String, String> headerMap = new HashMap<>();
             headerMap.put("Content-Type", "application/json");
             //...
             //headerMap.put("other keys", "other values");
             //...
             return headerMap;
        }
Hope this helps!

                        
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