Java HttpMethod.setFollowRedirects方法代碼示例

import org.apache.commons.httpclient.HttpMethod; //導入方法依賴的package包/類
/**
 * Will create the method and execute it. After this the method is sent to a
 * ResponseHandler that is returned.
 * 
 * @param httpRequest
 *            Request we are receiving from the client
 * @param url
 *            The location we are proxying to
 * @return A ResponseHandler that can be used to write the response
 * @throws MethodNotAllowedException
 *             If the method specified by the request isn't handled
 * @throws IOException
 *             When there is a problem with the streams
 * @throws HttpException
 *             The httpclient can throw HttpExcetion when executing the
 *             method
 */
ResponseHandler executeRequest(HttpServletRequest httpRequest, String url)
        throws MethodNotAllowedException, IOException, HttpException {
    RequestHandler requestHandler = RequestHandlerFactory
            .createRequestMethod(httpRequest.getMethod());

    HttpMethod method = requestHandler.process(httpRequest, url);
    method.setFollowRedirects(false);

    /*
     * Why does method.validate() return true when the method has been
     * aborted? I mean, if validate returns true the API says that means
     * that the method is ready to be executed. TODO I don't like doing type
     * casting here, see above.
     */
    if (!((HttpMethodBase) method).isAborted()) {
        httpClient.executeMethod(method);

        if (method.getStatusCode() == 405) {
            Header allow = method.getResponseHeader("allow");
            String value = allow.getValue();
            throw new MethodNotAllowedException(
                    "Status code 405 from server",
                    AllowedMethodHandler.processAllowHeader(value));
        }
    }

    return ResponseHandlerFactory.createResponseHandler(method);
}
 

import org.apache.commons.httpclient.HttpMethod; //導入方法依賴的package包/類
protected HttpMethod createMethod(Request req) throws IOException
{
    StringBuilder url = new StringBuilder(128);
    url.append(baseUrl);
    url.append("/service/");
    url.append(req.getFullUri());

    // construct method
    HttpMethod httpMethod = null;
    String method = req.getMethod();
    if(method.equalsIgnoreCase("GET"))
    {
        GetMethod get = new GetMethod(url.toString());
        httpMethod = get;
        httpMethod.setFollowRedirects(true);
    }
    else if(method.equalsIgnoreCase("POST"))
    {
        PostMethod post = new PostMethod(url.toString());
        httpMethod = post;
        ByteArrayRequestEntity requestEntity = new ByteArrayRequestEntity(req.getBody(), req.getType());
        if (req.getBody().length > DEFAULT_SAVEPOST_BUFFER)
        {
            post.getParams().setBooleanParameter(HttpMethodParams.USE_EXPECT_CONTINUE, true);
        }
        post.setRequestEntity(requestEntity);
        // Note: not able to automatically follow redirects for POST, this is handled by sendRemoteRequest
    }
    else if(method.equalsIgnoreCase("HEAD"))
    {
        HeadMethod head = new HeadMethod(url.toString());
        httpMethod = head;
        httpMethod.setFollowRedirects(true);
    }
    else
    {
        throw new AlfrescoRuntimeException("Http Method " + method + " not supported");
    }

    if (req.getHeaders() != null)
    {
        for (Map.Entry<String, String> header : req.getHeaders().entrySet())
        {
            httpMethod.setRequestHeader(header.getKey(), header.getValue());
        }
    }
    
    return httpMethod;
}