Android Volley支持多个cookie

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原创文章，转载请注明出处：http://blog.csdn.net/wj2030/article/details/43731703

最近在做一个项目，考虑到volley使用比较方便，就将其选择为网络工具。可是在使用途中发现，由于我们的项目在登录验证的时候，返回了多个cookie.也就是返回的头信息中Set-Cookie有多个值，但是volley在onResponse中只能得到一个cookie.刚开始非常郁闷，以至于我又用HttpClient编写了一个测试程序。发现，的确是volley的问题。找到问题就好办了，volley是开源的想怎么修改，就怎么修改。

关于volley的详解，不了解的可以看看郭神的博客。这里附上郭神的文章地址：http://blog.csdn.net/guolin_blog/article/details/17482095

可以知道，在网络通信过程中volley会根据版本号选择使用httpclientStack或则hurlStack。通过查看两者的源代码如下：

HttpClientStack-->

public HttpResponse performRequest(Request<?> request, Map<String, String> additionalHeaders)            throws IOException, AuthFailureError {        HttpUriRequest httpRequest = createHttpRequest(request, additionalHeaders);        addHeaders(httpRequest, additionalHeaders);        addHeaders(httpRequest, request.getHeaders());        onPrepareRequest(httpRequest);        HttpParams httpParams = httpRequest.getParams();        int timeoutMs = request.getTimeoutMs();        // TODO: Reevaluate this connection timeout based on more wide-scale        // data collection and possibly different for wifi vs. 3G.        HttpConnectionParams.setConnectionTimeout(httpParams, 5000);        HttpConnectionParams.setSoTimeout(httpParams, timeoutMs);        return mClient.execute(httpRequest);    }

很明显没啥异常。但是HurlStack-->中如下：

public HttpResponse performRequest(Request<?> request, Map<String, String> additionalHeaders)throws IOException, AuthFailureError {String url = request.getUrl();HashMap<String, String> map = new HashMap<String, String>();map.putAll(request.getHeaders());map.putAll(additionalHeaders);if (mUrlRewriter != null) {String rewritten = mUrlRewriter.rewriteUrl(url);if (rewritten == null) {throw new IOException("URL blocked by rewriter: " + url);}url = rewritten;}URL parsedUrl = new URL(url);HttpURLConnection connection = openConnection(parsedUrl, request);for (String headerName : map.keySet()) {connection.addRequestProperty(headerName, map.get(headerName));}setConnectionParametersForRequest(connection, request);// Initialize HttpResponse with data from the HttpURLConnection.ProtocolVersion protocolVersion = new ProtocolVersion("HTTP", 1, 1);int responseCode = connection.getResponseCode();if (responseCode == -1) {// -1 is returned by getResponseCode() if the response code could not be retrieved.// Signal to the caller that something was wrong with the connection.throw new IOException("Could not retrieve response code from HttpUrlConnection.");}StatusLine responseStatus = new BasicStatusLine(protocolVersion,connection.getResponseCode(), connection.getResponseMessage());BasicHttpResponse response = new BasicHttpResponse(responseStatus);response.setEntity(entityFromConnection(connection));for (Entry<String, List<String>> header : connection.getHeaderFields().entrySet()) {if (header.getKey() != null) {Header h = new BasicHeader(header.getKey(), header.getValue().get(0));                    // 这里发现一个问题response.addHeader(h);}}return response;}

如上注释，我们可以看到，在hurlStack中，添加到response中的header只是每一中头信息的第一项，也就是导致我Set-Cookie最后只有第一个cookie后面的都没有了。既然发现里问题，那就修改，只需要修改一点，我的修改如下：

for (Entry<String, List<String>> header : connection.getHeaderFields().entrySet()) {            if (header.getKey() != null) {                StringBuffer sb = new StringBuffer();                for(int i=0;i<header.getValue().size();i++){                    sb.append(header.getValue().get(i));                    sb.append("\n");                }                Header h = new BasicHeader(header.getKey(),sb.toString());                //Header h = new BasicHeader(header.getKey(), header.getValue().get(0));                response.addHeader(h);            }        }

这样返回的response中的头信息就全部在里，只是每一个cookie之间添加里一个回车而已。下面贴上我打包生存的.arr文件。方便各位使用。

http://download.csdn.net/detail/wj2030/8439845

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