Example #1
0
  // non-javadoc, see interface ClientRequestDirector
  public HttpResponse execute(HttpHost target, HttpRequest request, HttpContext context)
      throws HttpException, IOException {

    HttpRequest orig = request;
    RequestWrapper origWrapper = wrapRequest(orig);
    origWrapper.setParams(params);
    HttpRoute origRoute = determineRoute(target, origWrapper, context);

    RoutedRequest roureq = new RoutedRequest(origWrapper, origRoute);

    long timeout = ConnManagerParams.getTimeout(params);

    int execCount = 0;

    boolean reuse = false;
    HttpResponse response = null;
    boolean done = false;
    try {
      while (!done) {
        // In this loop, the RoutedRequest may be replaced by a
        // followup request and route. The request and route passed
        // in the method arguments will be replaced. The original
        // request is still available in 'orig'.

        RequestWrapper wrapper = roureq.getRequest();
        HttpRoute route = roureq.getRoute();

        // See if we have a user token bound to the execution context
        Object userToken = context.getAttribute(ClientContext.USER_TOKEN);

        // Allocate connection if needed
        if (managedConn == null) {
          ClientConnectionRequest connRequest = connManager.requestConnection(route, userToken);
          if (orig instanceof AbortableHttpRequest) {
            ((AbortableHttpRequest) orig).setConnectionRequest(connRequest);
          }

          try {
            managedConn = connRequest.getConnection(timeout, TimeUnit.MILLISECONDS);
          } catch (InterruptedException interrupted) {
            InterruptedIOException iox = new InterruptedIOException();
            iox.initCause(interrupted);
            throw iox;
          }

          if (HttpConnectionParams.isStaleCheckingEnabled(params)) {
            // validate connection
            this.log.debug("Stale connection check");
            if (managedConn.isStale()) {
              this.log.debug("Stale connection detected");
              // BEGIN android-changed
              try {
                managedConn.close();
              } catch (IOException ignored) {
                // SSLSocket's will throw IOException
                // because they can't send a "close
                // notify" protocol message to the
                // server. Just supresss any
                // exceptions related to closing the
                // stale connection.
              }
              // END android-changed
            }
          }
        }

        if (orig instanceof AbortableHttpRequest) {
          ((AbortableHttpRequest) orig).setReleaseTrigger(managedConn);
        }

        // Reopen connection if needed
        if (!managedConn.isOpen()) {
          managedConn.open(route, context, params);
        }
        // BEGIN android-added
        else {
          // b/3241899 set the per request timeout parameter on reused connections
          managedConn.setSocketTimeout(HttpConnectionParams.getSoTimeout(params));
        }
        // END android-added

        try {
          establishRoute(route, context);
        } catch (TunnelRefusedException ex) {
          if (this.log.isDebugEnabled()) {
            this.log.debug(ex.getMessage());
          }
          response = ex.getResponse();
          break;
        }

        // Reset headers on the request wrapper
        wrapper.resetHeaders();

        // Re-write request URI if needed
        rewriteRequestURI(wrapper, route);

        // Use virtual host if set
        target = (HttpHost) wrapper.getParams().getParameter(ClientPNames.VIRTUAL_HOST);

        if (target == null) {
          target = route.getTargetHost();
        }

        HttpHost proxy = route.getProxyHost();

        // Populate the execution context
        context.setAttribute(ExecutionContext.HTTP_TARGET_HOST, target);
        context.setAttribute(ExecutionContext.HTTP_PROXY_HOST, proxy);
        context.setAttribute(ExecutionContext.HTTP_CONNECTION, managedConn);
        context.setAttribute(ClientContext.TARGET_AUTH_STATE, targetAuthState);
        context.setAttribute(ClientContext.PROXY_AUTH_STATE, proxyAuthState);

        // Run request protocol interceptors
        requestExec.preProcess(wrapper, httpProcessor, context);

        context.setAttribute(ExecutionContext.HTTP_REQUEST, wrapper);

        boolean retrying = true;
        while (retrying) {
          // Increment total exec count (with redirects)
          execCount++;
          // Increment exec count for this particular request
          wrapper.incrementExecCount();
          if (wrapper.getExecCount() > 1 && !wrapper.isRepeatable()) {
            throw new NonRepeatableRequestException(
                "Cannot retry request " + "with a non-repeatable request entity");
          }

          try {
            if (this.log.isDebugEnabled()) {
              this.log.debug("Attempt " + execCount + " to execute request");
            }
            response = requestExec.execute(wrapper, managedConn, context);
            retrying = false;

          } catch (IOException ex) {
            this.log.debug("Closing the connection.");
            managedConn.close();
            if (retryHandler.retryRequest(ex, execCount, context)) {
              if (this.log.isInfoEnabled()) {
                this.log.info(
                    "I/O exception ("
                        + ex.getClass().getName()
                        + ") caught when processing request: "
                        + ex.getMessage());
              }
              if (this.log.isDebugEnabled()) {
                this.log.debug(ex.getMessage(), ex);
              }
              this.log.info("Retrying request");
            } else {
              throw ex;
            }

            // If we have a direct route to the target host
            // just re-open connection and re-try the request
            if (route.getHopCount() == 1) {
              this.log.debug("Reopening the direct connection.");
              managedConn.open(route, context, params);
            } else {
              // otherwise give up
              throw ex;
            }
          }
        }

        // Run response protocol interceptors
        response.setParams(params);
        requestExec.postProcess(response, httpProcessor, context);

        // The connection is in or can be brought to a re-usable state.
        reuse = reuseStrategy.keepAlive(response, context);
        if (reuse) {
          // Set the idle duration of this connection
          long duration = keepAliveStrategy.getKeepAliveDuration(response, context);
          managedConn.setIdleDuration(duration, TimeUnit.MILLISECONDS);
        }

        RoutedRequest followup = handleResponse(roureq, response, context);
        if (followup == null) {
          done = true;
        } else {
          if (reuse) {
            this.log.debug("Connection kept alive");
            // Make sure the response body is fully consumed, if present
            HttpEntity entity = response.getEntity();
            if (entity != null) {
              entity.consumeContent();
            }
            // entity consumed above is not an auto-release entity,
            // need to mark the connection re-usable explicitly
            managedConn.markReusable();
          } else {
            managedConn.close();
          }
          // check if we can use the same connection for the followup
          if (!followup.getRoute().equals(roureq.getRoute())) {
            releaseConnection();
          }
          roureq = followup;
        }

        userToken = this.userTokenHandler.getUserToken(context);
        context.setAttribute(ClientContext.USER_TOKEN, userToken);
        if (managedConn != null) {
          managedConn.setState(userToken);
        }
      } // while not done

      // check for entity, release connection if possible
      if ((response == null)
          || (response.getEntity() == null)
          || !response.getEntity().isStreaming()) {
        // connection not needed and (assumed to be) in re-usable state
        if (reuse) managedConn.markReusable();
        releaseConnection();
      } else {
        // install an auto-release entity
        HttpEntity entity = response.getEntity();
        entity = new BasicManagedEntity(entity, managedConn, reuse);
        response.setEntity(entity);
      }

      return response;

    } catch (HttpException ex) {
      abortConnection();
      throw ex;
    } catch (IOException ex) {
      abortConnection();
      throw ex;
    } catch (RuntimeException ex) {
      abortConnection();
      throw ex;
    }
  } // execute
Example #2
0
  public void run() {
    try {
      Socket socket = new Socket(host.getHostName(), host.getPort());
      conn.bind(socket, params);

      // build request
      BasicHttpRequest request;

      if (!this.getRequest().getBody().isEmpty()) {
        request =
            new BasicHttpEntityEnclosingRequest(
                this.getRequest().getMethod(), this.getRequest().getPath());
      } else {
        request = new BasicHttpRequest(this.getRequest().getMethod(), this.getRequest().getPath());
      }

      // add headers
      Map<String, String> headers = this.getRequest().getHeaders();
      Iterator<Map.Entry<String, String>> it = headers.entrySet().iterator();

      while (it.hasNext()) {
        Map.Entry<String, String> pairs = it.next();

        request.addHeader(pairs.getKey(), pairs.getValue());
      }

      // set body
      if (request instanceof BasicHttpEntityEnclosingRequest) {
        StringEntity body = new StringEntity(this.getRequest().getBody());

        ((BasicHttpEntityEnclosingRequest) request).setEntity(body);
      }

      logger.info("> " + request.getRequestLine().getUri());

      // request
      request.setParams(params);
      httpexecutor.preProcess(request, httpproc, context);

      HttpResponse response = httpexecutor.execute(request, conn, context);
      response.setParams(params);
      httpexecutor.postProcess(response, httpproc, context);

      logger.info("< " + response.getStatusLine());

      // set all request headers
      Header[] allHeaders = request.getAllHeaders();

      for (int i = 0; i < allHeaders.length; i++) {
        this.getRequest().setHeader(allHeaders[i].getName(), allHeaders[i].getValue());
      }

      // create response
      String content = "";
      HttpEntity entity = response.getEntity();

      if (entity != null) {
        content = EntityUtils.toString(entity);
      }

      this.response = new Response(response, content);

      // call callback
      callback.onResponse(this.request, this.response);
    } catch (Exception e) {
      Aletheia.handleException(e);
    } finally {
      try {
        conn.close();
      } catch (Exception e) {
        Aletheia.handleException(e);
      }
    }
  }
Example #3
0
  public static void main(String[] args) throws Exception {

    HttpParams params = new SyncBasicHttpParams();
    HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
    HttpProtocolParams.setContentCharset(params, "UTF-8");
    HttpProtocolParams.setUserAgent(params, "HttpComponents/1.1");
    HttpProtocolParams.setUseExpectContinue(params, true);
    HttpProcessor httpproc =
        new ImmutableHttpProcessor(
            new HttpRequestInterceptor[] {
              new RequestContent(),
              new RequestTargetHost(),
              new RequestConnControl(),
              new RequestUserAgent(),
              new RequestExpectContinue()
            });
    HttpRequestExecutor httpexecutor = new HttpRequestExecutor();
    HttpContext context = new BasicHttpContext(null);
    HttpHost host = new HttpHost("localhost", 8080);
    DefaultHttpClientConnection conn = new DefaultHttpClientConnection();
    ConnectionReuseStrategy connStrategy = new DefaultConnectionReuseStrategy();
    context.setAttribute(ExecutionContext.HTTP_CONNECTION, conn);
    context.setAttribute(ExecutionContext.HTTP_TARGET_HOST, host);
    try {

      String[] targets = {"/t.html"};

      for (int i = 0; i < targets.length; i++) {

        if (!conn.isOpen()) {

          Socket socket = new Socket(host.getHostName(), host.getPort());

          conn.bind(socket, params);
        }

        BasicHttpRequest request = new BasicHttpRequest("GET", targets[i]);

        System.out.println(">> Request URI: " + request.getRequestLine().getUri());

        request.setParams(params);

        httpexecutor.preProcess(request, httpproc, context);

        HttpResponse response = httpexecutor.execute(request, conn, context);

        response.setParams(params);

        httpexecutor.postProcess(response, httpproc, context);

        System.out.println("<< Response: " + response.getStatusLine());

        System.out.println(EntityUtils.toString(response.getEntity()));

        System.out.println("==============");

        if (!connStrategy.keepAlive(response, context)) {

          conn.close();

        } else {

          System.out.println("Connection kept alive...");
        }
      }

    } finally {

      conn.close();
    }
  }