com.google.gwt.http.client.ResponseImpl.java Source code

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Here is the source code for com.google.gwt.http.client.ResponseImpl.java

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/*
 * Copyright 2008 Google Inc.
 * 
 * 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.google.gwt.http.client;

import com.google.gwt.xhr.client.XMLHttpRequest;

import java.util.ArrayList;
import java.util.List;

/**
 * A {@link Response} implementation based on a {@link XMLHttpRequest}.
 */
class ResponseImpl extends Response {

    private final XMLHttpRequest xmlHttpRequest;

    public ResponseImpl(XMLHttpRequest xmlHttpRequest) {
        this.xmlHttpRequest = xmlHttpRequest;

        assert isResponseReady();
    }

    @Override
    public String getHeader(String header) {
        StringValidator.throwIfEmptyOrNull("header", header);

        return xmlHttpRequest.getResponseHeader(header);
    }

    @Override
    public Header[] getHeaders() {
        String allHeaders = getHeadersAsString();
        String[] unparsedHeaders = allHeaders.split("\n");
        List<Header> parsedHeaders = new ArrayList<Header>();

        for (String unparsedHeader : unparsedHeaders) {

            if (unparsedHeader == null || unparsedHeader.trim().isEmpty()) {
                continue;
            }

            int endOfNameIdx = unparsedHeader.indexOf(':');
            if (endOfNameIdx < 0) {
                continue;
            }

            final String name = unparsedHeader.substring(0, endOfNameIdx).trim();
            final String value = unparsedHeader.substring(endOfNameIdx + 1).trim();
            Header header = new Header() {
                @Override
                public String getName() {
                    return name;
                }

                @Override
                public String getValue() {
                    return value;
                }

                @Override
                public String toString() {
                    return name + " : " + value;
                }
            };

            parsedHeaders.add(header);
        }

        return parsedHeaders.toArray(new Header[parsedHeaders.size()]);
    }

    @Override
    public String getHeadersAsString() {
        String headers = xmlHttpRequest.getAllResponseHeaders();
        return headers != null ? headers : "";
    }

    @Override
    public int getStatusCode() {
        return xmlHttpRequest.getStatus();
    }

    @Override
    public String getStatusText() {
        return xmlHttpRequest.getStatusText();
    }

    @Override
    public String getText() {
        return xmlHttpRequest.getResponseText();
    }

    protected boolean isResponseReady() {
        return xmlHttpRequest.getReadyState() == XMLHttpRequest.DONE;
    }
}