1 files changed, 137 insertions, 0 deletions
diff --git a/core/src/main/java/com/android/volley/toolbox/JsonRequest.java b/core/src/main/java/com/android/volley/toolbox/JsonRequest.java
new file mode 100644
index 0000000..c2d1fad
--- /dev/null
+++ b/core/src/main/java/com/android/volley/toolbox/JsonRequest.java
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.volley.toolbox;
+
+import androidx.annotation.GuardedBy;
+import androidx.annotation.Nullable;
+import com.android.volley.NetworkResponse;
+import com.android.volley.Request;
+import com.android.volley.Response;
+import com.android.volley.Response.ErrorListener;
+import com.android.volley.Response.Listener;
+import com.android.volley.VolleyLog;
+import java.io.UnsupportedEncodingException;
+
+/**
+ * A request for retrieving a T type response body at a given URL that also optionally sends along a
+ * JSON body in the request specified.
+ *
+ * @param <T> JSON type of response expected
+ */
+public abstract class JsonRequest<T> extends Request<T> {
+    /** Default charset for JSON request. */
+    protected static final String PROTOCOL_CHARSET = "utf-8";
+
+    /** Content type for request. */
+    private static final String PROTOCOL_CONTENT_TYPE =
+            String.format("application/json; charset=%s", PROTOCOL_CHARSET);
+
+    /** Lock to guard mListener as it is cleared on cancel() and read on delivery. */
+    private final Object mLock = new Object();
+
+    @Nullable
+    @GuardedBy("mLock")
+    private Listener<T> mListener;
+
+    @Nullable private final String mRequestBody;
+
+    /**
+     * Deprecated constructor for a JsonRequest which defaults to GET unless {@link #getPostBody()}
+     * or {@link #getPostParams()} is overridden (which defaults to POST).
+     *
+     * @deprecated Use {@link #JsonRequest(int, String, String, Listener, ErrorListener)}.
+     */
+    @Deprecated
+    public JsonRequest(
+            String url, String requestBody, Listener<T> listener, ErrorListener errorListener) {
+        this(Method.DEPRECATED_GET_OR_POST, url, requestBody, listener, errorListener);
+    }
+
+    /**
+     * Creates a new request.
+     *
+     * @param method the HTTP method to use
+     * @param url URL to fetch the JSON from
+     * @param requestBody The content to post as the body of the request. Null indicates no
+     *     parameters will be posted along with request.
+     * @param listener Listener to receive the JSON response
+     * @param errorListener Error listener, or null to ignore errors.
+     */
+    public JsonRequest(
+            int method,
+            String url,
+            @Nullable String requestBody,
+            Listener<T> listener,
+            @Nullable ErrorListener errorListener) {
+        super(method, url, errorListener);
+        mListener = listener;
+        mRequestBody = requestBody;
+    }
+
+    @Override
+    public void cancel() {
+        super.cancel();
+        synchronized (mLock) {
+            mListener = null;
+        }
+    }
+
+    @Override
+    protected void deliverResponse(T response) {
+        Response.Listener<T> listener;
+        synchronized (mLock) {
+            listener = mListener;
+        }
+        if (listener != null) {
+            listener.onResponse(response);
+        }
+    }
+
+    @Override
+    protected abstract Response<T> parseNetworkResponse(NetworkResponse response);
+
+    /** @deprecated Use {@link #getBodyContentType()}. */
+    @Deprecated
+    @Override
+    public String getPostBodyContentType() {
+        return getBodyContentType();
+    }
+
+    /** @deprecated Use {@link #getBody()}. */
+    @Deprecated
+    @Override
+    public byte[] getPostBody() {
+        return getBody();
+    }
+
+    @Override
+    public String getBodyContentType() {
+        return PROTOCOL_CONTENT_TYPE;
+    }
+
+    @Override
+    public byte[] getBody() {
+        try {
+            return mRequestBody == null ? null : mRequestBody.getBytes(PROTOCOL_CHARSET);
+        } catch (UnsupportedEncodingException uee) {
+            VolleyLog.wtf(
+                    "Unsupported Encoding while trying to get the bytes of %s using %s",
+                    mRequestBody, PROTOCOL_CHARSET);
+            return null;
+        }
+    }
+}