Volley - 如何发送 DELETE 请求参数? [英] Volley - how to send DELETE request parameters?
问题描述
我正在尝试使用 Volley 向我的服务器发送 DELETE 类型的请求并向该请求添加参数.到目前为止，我还无法做到这一点.
I'm trying to use Volley to send a DELETE type request to my server and add parameters to the request. So far I haven't been able to do so.
创建自定义请求并覆盖 getParams() 方法对我没有帮助，因为不会为 DELETE 类型请求调用此方法.
Creating a custom request and overriding the getParams() method didn't help me because this method does not get called for the DELETE type request.
如何向 Volley 中的 DELETE 请求添加参数?
How can I add parameters to a DELETE request in Volley?
推荐答案
同样的问题，但我找到了解决方案.
Same problem here but I found the solution.
问题是在 com.android.volley.toolbox.HttpClientStack.java 中实现了 createHttpRequest 方法，只有当请求方法是 POST、PUT 或 PATCH 时才会添加正文.
The problem is the implementation of the createHttpRequest method in com.android.volley.toolbox.HttpClientStack.java which will add the body only if the request method is POST, PUT or PATCH.
/**
* Creates the appropriate subclass of HttpUriRequest for passed in request.
*/
@SuppressWarnings("deprecation")
/* protected */ static HttpUriRequest createHttpRequest(Request<?> request,
Map<String, String> additionalHeaders) throws AuthFailureError {
switch (request.getMethod()) {
case Method.DEPRECATED_GET_OR_POST: {
// This is the deprecated way that needs to be handled for backwards compatibility.
// If the request's post body is null, then the assumption is that the request is
// GET. Otherwise, it is assumed that the request is a POST.
byte[] postBody = request.getPostBody();
if (postBody != null) {
HttpPost postRequest = new HttpPost(request.getUrl());
postRequest.addHeader(HEADER_CONTENT_TYPE, request.getPostBodyContentType());
HttpEntity entity;
entity = new ByteArrayEntity(postBody);
postRequest.setEntity(entity);
return postRequest;
} else {
return new HttpGet(request.getUrl());
}
}
case Method.GET:
return new HttpGet(request.getUrl());
case Method.DELETE:
return new HttpDelete(request.getUrl());
case Method.POST: {
HttpPost postRequest = new HttpPost(request.getUrl());
postRequest.addHeader(HEADER_CONTENT_TYPE, request.getBodyContentType());
setEntityIfNonEmptyBody(postRequest, request);
return postRequest;
}
case Method.PUT: {
HttpPut putRequest = new HttpPut(request.getUrl());
putRequest.addHeader(HEADER_CONTENT_TYPE, request.getBodyContentType());
setEntityIfNonEmptyBody(putRequest, request);
return putRequest;
}
case Method.HEAD:
return new HttpHead(request.getUrl());
case Method.OPTIONS:
return new HttpOptions(request.getUrl());
case Method.TRACE:
return new HttpTrace(request.getUrl());
case Method.PATCH: {
HttpPatch patchRequest = new HttpPatch(request.getUrl());
patchRequest.addHeader(HEADER_CONTENT_TYPE, request.getBodyContentType());
setEntityIfNonEmptyBody(patchRequest, request);
return patchRequest;
}
default:
throw new IllegalStateException("Unknown request method.");
}
}
因此您必须使用自己的 HttpStack.java 实现或覆盖 HttpClientStack 类.
So you have to use your own implementation of HttpStack.java or you override HttpClientStack class.
首先你应该从
RequestQueue requestQueue = Volley.newRequestQueue(sContext);
到
String userAgent = "volley/0";
try {
String packageName = getContext().getPackageName();
PackageInfo info = getContext().getPackageManager().getPackageInfo(packageName, 0);
userAgent = packageName + "/" + info.versionCode;
} catch (PackageManager.NameNotFoundException e) {}
HttpStack httpStack = new OwnHttpClientStack(AndroidHttpClient.newInstance(userAgent));
RequestQueue requesQueue = Volley.newRequestQueue(sContext, httpStack);
并编写您自己的 HttpClientStack 实现，您可以在方法 createHttpRequest() 中更改Method.POST:"的大小写.您还必须创建一个像OwnHttpDelete"这样的对象作为 HttpEntityEnclosureRequestBase 的扩展来使用 setEntityIfNonEmptyBody() 方法.
and write your own implementation of HttpClientStack where you change the case of "Method.POST:" in the method createHttpRequest(). You also have to create an Object like "OwnHttpDelete" as extention of HttpEntityEnclosingRequestBase to use the method setEntityIfNonEmptyBody().
public class OwnHttpClientStack extends com.android.volley.toolbox.HttpClientStack {
private final static String HEADER_CONTENT_TYPE = "Content-Type";
public OwnHttpClientStack(HttpClient client) {
super(client);
}
@Override
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);
}
private static void addHeaders(HttpUriRequest httpRequest, Map<String, String> headers) {
for (String key : headers.keySet()) {
httpRequest.setHeader(key, headers.get(key));
}
}
static HttpUriRequest createHttpRequest(Request<?> request, Map<String, String> additionalHeaders) throws AuthFailureError {
switch (request.getMethod()) {
case Request.Method.DEPRECATED_GET_OR_POST: {
byte[] postBody = request.getPostBody();
if (postBody != null) {
HttpPost postRequest = new HttpPost(request.getUrl());
postRequest.addHeader(HEADER_CONTENT_TYPE, request.getPostBodyContentType());
HttpEntity entity;
entity = new ByteArrayEntity(postBody);
postRequest.setEntity(entity);
return postRequest;
} else {
return new HttpGet(request.getUrl());
}
}
case Request.Method.GET:
return new HttpGet(request.getUrl());
case Request.Method.DELETE:
OwnHttpDelete deleteRequest = new OwnHttpDelete(request.getUrl());
deleteRequest.addHeader(HEADER_CONTENT_TYPE, request.getBodyContentType());
setEntityIfNonEmptyBody(deleteRequest, request);
return deleteRequest;
case Request.Method.POST: {
HttpPost postRequest = new HttpPost(request.getUrl());
postRequest.addHeader(HEADER_CONTENT_TYPE, request.getBodyContentType());
setEntityIfNonEmptyBody(postRequest, request);
return postRequest;
}
case Request.Method.PUT: {
HttpPut putRequest = new HttpPut(request.getUrl());
putRequest.addHeader(HEADER_CONTENT_TYPE, request.getBodyContentType());
setEntityIfNonEmptyBody(putRequest, request);
return putRequest;
}
case Request.Method.HEAD:
return new HttpHead(request.getUrl());
case Request.Method.OPTIONS:
return new HttpOptions(request.getUrl());
case Request.Method.TRACE:
return new HttpTrace(request.getUrl());
case Request.Method.PATCH: {
HttpPatch patchRequest = new HttpPatch(request.getUrl());
patchRequest.addHeader(HEADER_CONTENT_TYPE, request.getBodyContentType());
setEntityIfNonEmptyBody(patchRequest, request);
return patchRequest;
}
default:
throw new IllegalStateException("Unknown request method.");
}
}
private static void setEntityIfNonEmptyBody(HttpEntityEnclosingRequestBase httpRequest,
Request<?> request) throws AuthFailureError {
byte[] body = request.getBody();
if (body != null) {
HttpEntity entity = new ByteArrayEntity(body);
httpRequest.setEntity(entity);
}
}
private static class OwnHttpDelete extends HttpPost {
public static final String METHOD_NAME = "DELETE";
public OwnHttpDelete() {
super();
}
public OwnHttpDelete(URI uri) {
super(uri);
}
public OwnHttpDelete(String uri) {
super(uri);
}
public String getMethod() {
return METHOD_NAME;
}
}
}
我希望我的代码对某人有所帮助.还应该可以向 HEAD 请求添加参数.
I hope my code will help someone. It should also be possible to add parameters to a HEAD request.
这篇关于Volley - 如何发送 DELETE 请求参数?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
