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HttpService.javaAPI DocAndroid 1.5 API10023Wed May 06 22:41:10 BST 2009org.apache.http.protocol

HttpService

public class HttpService extends Object
Minimalistic server-side implementation of an HTTP processor.
author
Oleg Kalnichevski
version
$Revision: 610763 $

Fields Summary
private HttpParams
params
private HttpProcessor
processor
private HttpRequestHandlerResolver
handlerResolver
private ConnectionReuseStrategy
connStrategy
private HttpResponseFactory
responseFactory
private HttpExpectationVerifier
expectationVerifier
Constructors Summary
public HttpService(HttpProcessor proc, ConnectionReuseStrategy connStrategy, HttpResponseFactory responseFactory)
Create a new HTTP service.

param
proc the processor to use on requests and responses
param
connStrategy the connection reuse strategy
param
responseFactory the response factory

    
                                                    
     
              
              
               
        super();
        setHttpProcessor(proc);
        setConnReuseStrategy(connStrategy);
        setResponseFactory(responseFactory);
Methods Summary
protected voiddoService(org.apache.http.HttpRequest request, org.apache.http.HttpResponse response, org.apache.http.protocol.HttpContext context)

        HttpRequestHandler handler = null;
        if (this.handlerResolver != null) {
            String requestURI = request.getRequestLine().getUri();
            handler = this.handlerResolver.lookup(requestURI);
        }
        if (handler != null) {
            handler.handle(request, response, context);
        } else {
            response.setStatusCode(HttpStatus.SC_NOT_IMPLEMENTED);
        }
public org.apache.http.params.HttpParamsgetParams()

        return this.params;
protected voidhandleException(org.apache.http.HttpException ex, org.apache.http.HttpResponse response)

        if (ex instanceof MethodNotSupportedException) {
            response.setStatusCode(HttpStatus.SC_NOT_IMPLEMENTED);
        } else if (ex instanceof UnsupportedHttpVersionException) {
            response.setStatusCode(HttpStatus.SC_HTTP_VERSION_NOT_SUPPORTED);
        } else if (ex instanceof ProtocolException) {
            response.setStatusCode(HttpStatus.SC_BAD_REQUEST);
        } else {
            response.setStatusCode(HttpStatus.SC_INTERNAL_SERVER_ERROR);
        }
        byte[] msg = EncodingUtils.getAsciiBytes(ex.getMessage());
        ByteArrayEntity entity = new ByteArrayEntity(msg);
        entity.setContentType("text/plain; charset=US-ASCII");
        response.setEntity(entity);
public voidhandleRequest(org.apache.http.HttpServerConnection conn, org.apache.http.protocol.HttpContext context)

 
        
        context.setAttribute(ExecutionContext.HTTP_CONNECTION, conn);

        HttpResponse response = null;
        
        try {

            HttpRequest request = conn.receiveRequestHeader();
            request.setParams(
                    new DefaultedHttpParams(request.getParams(), this.params));
            
            ProtocolVersion ver =
                request.getRequestLine().getProtocolVersion();
            if (!ver.lessEquals(HttpVersion.HTTP_1_1)) {
                // Downgrade protocol version if greater than HTTP/1.1 
                ver = HttpVersion.HTTP_1_1;
            }

            if (request instanceof HttpEntityEnclosingRequest) {

                if (((HttpEntityEnclosingRequest) request).expectContinue()) {
                    response = this.responseFactory.newHttpResponse(ver, 
                            HttpStatus.SC_CONTINUE, context);
                    response.setParams(
                            new DefaultedHttpParams(response.getParams(), this.params));
                    
                    if (this.expectationVerifier != null) {
                        try {
                            this.expectationVerifier.verify(request, response, context);
                        } catch (HttpException ex) {
                            response = this.responseFactory.newHttpResponse(HttpVersion.HTTP_1_0, 
                                    HttpStatus.SC_INTERNAL_SERVER_ERROR, context);
                            response.setParams(
                                    new DefaultedHttpParams(response.getParams(), this.params));
                            handleException(ex, response);
                        }
                    }
                    if (response.getStatusLine().getStatusCode() < 200) {
                        // Send 1xx response indicating the server expections
                        // have been met
                        conn.sendResponseHeader(response);
                        conn.flush();
                        response = null;
                        conn.receiveRequestEntity((HttpEntityEnclosingRequest) request);
                    }
                } else {
                    conn.receiveRequestEntity((HttpEntityEnclosingRequest) request);
                }
            }

            if (response == null) {
                response = this.responseFactory.newHttpResponse(ver, HttpStatus.SC_OK, context);
                response.setParams(
                        new DefaultedHttpParams(response.getParams(), this.params));

                context.setAttribute(ExecutionContext.HTTP_REQUEST, request);
                context.setAttribute(ExecutionContext.HTTP_RESPONSE, response);

                this.processor.process(request, context);
                doService(request, response, context);
            }
            
            // Make sure the request content is fully consumed
            if (request instanceof HttpEntityEnclosingRequest) {
                HttpEntity entity = ((HttpEntityEnclosingRequest)request).getEntity();
                if (entity != null) {
                    entity.consumeContent();
                }
            }
            
        } catch (HttpException ex) {
            response = this.responseFactory.newHttpResponse
                (HttpVersion.HTTP_1_0, HttpStatus.SC_INTERNAL_SERVER_ERROR,
                 context);
            response.setParams(
                    new DefaultedHttpParams(response.getParams(), this.params));
            handleException(ex, response);
        }
        
        this.processor.process(response, context);
        conn.sendResponseHeader(response);
        conn.sendResponseEntity(response);
        conn.flush();
        
        if (!this.connStrategy.keepAlive(response, context)) {
            conn.close();
        }
public voidsetConnReuseStrategy(org.apache.http.ConnectionReuseStrategy connStrategy)

        if (connStrategy == null) {
            throw new IllegalArgumentException("Connection reuse strategy may not be null");
        }
        this.connStrategy = connStrategy;
public voidsetExpectationVerifier(org.apache.http.protocol.HttpExpectationVerifier expectationVerifier)

        this.expectationVerifier = expectationVerifier;
public voidsetHandlerResolver(org.apache.http.protocol.HttpRequestHandlerResolver handlerResolver)

        this.handlerResolver = handlerResolver;
public voidsetHttpProcessor(org.apache.http.protocol.HttpProcessor processor)

        if (processor == null) {
            throw new IllegalArgumentException("HTTP processor may not be null.");
        }
        this.processor = processor;
public voidsetParams(org.apache.http.params.HttpParams params)

        this.params = params;
public voidsetResponseFactory(org.apache.http.HttpResponseFactory responseFactory)

        if (responseFactory == null) {
            throw new IllegalArgumentException("Response factory may not be null");
        }
        this.responseFactory = responseFactory;