Examples with HttpException org.apache.http.HttpException used on opensource projects

Example 11 with HttpException

use of org.apache.http.HttpException in project platform_external_apache-http by android.

the class ProxySelectorRoutePlanner method determineProxy.

/**
     * Determines a proxy for the given target.
     *
     * @param target    the planned target, never <code>null</code>
     * @param request   the request to be sent, never <code>null</code>
     * @param context   the context, or <code>null</code>
     *
     * @return  the proxy to use, or <code>null</code> for a direct route
     *
     * @throws HttpException
     *         in case of system proxy settings that cannot be handled
     */
protected HttpHost determineProxy(HttpHost target, HttpRequest request, HttpContext context) throws HttpException {
    // the proxy selector can be 'unset', so we better deal with null here
    ProxySelector psel = this.proxySelector;
    if (psel == null)
        psel = ProxySelector.getDefault();
    if (psel == null)
        return null;
    URI targetURI = null;
    try {
        targetURI = new URI(target.toURI());
    } catch (URISyntaxException usx) {
        throw new HttpException("Cannot convert host to URI: " + target, usx);
    }
    List<Proxy> proxies = psel.select(targetURI);
    Proxy p = chooseProxy(proxies, target, request, context);
    HttpHost result = null;
    if (p.type() == Proxy.Type.HTTP) {
        // convert the socket address to an HttpHost
        if (!(p.address() instanceof InetSocketAddress)) {
            throw new HttpException("Unable to handle non-Inet proxy address: " + p.address());
        }
        final InetSocketAddress isa = (InetSocketAddress) p.address();
        // assume default scheme (http)
        result = new HttpHost(getHost(isa), isa.getPort());
    }
    return result;
}

Example 12 with HttpException

use of org.apache.http.HttpException in project platform_external_apache-http by android.

the class DefaultRequestDirector method createTunnelToTarget.

// establishConnection
/**
     * Creates a tunnel to the target server.
     * The connection must be established to the (last) proxy.
     * A CONNECT request for tunnelling through the proxy will
     * be created and sent, the response received and checked.
     * This method does <i>not</i> update the connection with
     * information about the tunnel, that is left to the caller.
     *
     * @param route     the route to establish
     * @param context   the context for request execution
     *
     * @return  <code>true</code> if the tunnelled route is secure,
     *          <code>false</code> otherwise.
     *          The implementation here always returns <code>false</code>,
     *          but derived classes may override.
     *
     * @throws HttpException    in case of a problem
     * @throws IOException      in case of an IO problem
     */
protected boolean createTunnelToTarget(HttpRoute route, HttpContext context) throws HttpException, IOException {
    HttpHost proxy = route.getProxyHost();
    HttpHost target = route.getTargetHost();
    HttpResponse response = null;
    boolean done = false;
    while (!done) {
        done = true;
        if (!this.managedConn.isOpen()) {
            this.managedConn.open(route, context, this.params);
        }
        HttpRequest connect = createConnectRequest(route, context);
        String agent = HttpProtocolParams.getUserAgent(params);
        if (agent != null) {
            connect.addHeader(HTTP.USER_AGENT, agent);
        }
        connect.addHeader(HTTP.TARGET_HOST, target.toHostString());
        AuthScheme authScheme = this.proxyAuthState.getAuthScheme();
        AuthScope authScope = this.proxyAuthState.getAuthScope();
        Credentials creds = this.proxyAuthState.getCredentials();
        if (creds != null) {
            if (authScope != null || !authScheme.isConnectionBased()) {
                try {
                    connect.addHeader(authScheme.authenticate(creds, connect));
                } catch (AuthenticationException ex) {
                    if (this.log.isErrorEnabled()) {
                        this.log.error("Proxy authentication error: " + ex.getMessage());
                    }
                }
            }
        }
        response = requestExec.execute(connect, this.managedConn, context);
        int status = response.getStatusLine().getStatusCode();
        if (status < 200) {
            throw new HttpException("Unexpected response to CONNECT request: " + response.getStatusLine());
        }
        CredentialsProvider credsProvider = (CredentialsProvider) context.getAttribute(ClientContext.CREDS_PROVIDER);
        if (credsProvider != null && HttpClientParams.isAuthenticating(params)) {
            if (this.proxyAuthHandler.isAuthenticationRequested(response, context)) {
                this.log.debug("Proxy requested authentication");
                Map<String, Header> challenges = this.proxyAuthHandler.getChallenges(response, context);
                try {
                    processChallenges(challenges, this.proxyAuthState, this.proxyAuthHandler, response, context);
                } catch (AuthenticationException ex) {
                    if (this.log.isWarnEnabled()) {
                        this.log.warn("Authentication error: " + ex.getMessage());
                        break;
                    }
                }
                updateAuthState(this.proxyAuthState, proxy, credsProvider);
                if (this.proxyAuthState.getCredentials() != null) {
                    done = false;
                    // Retry request
                    if (this.reuseStrategy.keepAlive(response, context)) {
                        this.log.debug("Connection kept alive");
                        // Consume response content
                        HttpEntity entity = response.getEntity();
                        if (entity != null) {
                            entity.consumeContent();
                        }
                    } else {
                        this.managedConn.close();
                    }
                }
            } else {
                // Reset proxy auth scope
                this.proxyAuthState.setAuthScope(null);
            }
        }
    }
    int status = response.getStatusLine().getStatusCode();
    if (status > 299) {
        // Buffer response content
        HttpEntity entity = response.getEntity();
        if (entity != null) {
            response.setEntity(new BufferedHttpEntity(entity));
        }
        this.managedConn.close();
        throw new TunnelRefusedException("CONNECT refused by proxy: " + response.getStatusLine(), response);
    }
    this.managedConn.markReusable();
    // Leave it to derived classes, consider insecure by default here.
    return false;
}

Example 13 with HttpException

use of org.apache.http.HttpException in project platform_external_apache-http by android.

the class AbstractHttpClient method execute.

// non-javadoc, see interface HttpClient
public final HttpResponse execute(HttpHost target, HttpRequest request, HttpContext context) throws IOException, ClientProtocolException {
    if (request == null) {
        throw new IllegalArgumentException("Request must not be null.");
    }
    // a null target may be acceptable, this depends on the route planner
    // a null context is acceptable, default context created below
    HttpContext execContext = null;
    RequestDirector director = null;
    // all shared objects that are potentially threading unsafe.
    synchronized (this) {
        HttpContext defaultContext = createHttpContext();
        if (context == null) {
            execContext = defaultContext;
        } else {
            execContext = new DefaultedHttpContext(context, defaultContext);
        }
        // Create a director for this request
        director = createClientRequestDirector(getRequestExecutor(), getConnectionManager(), getConnectionReuseStrategy(), getConnectionKeepAliveStrategy(), getRoutePlanner(), getHttpProcessor().copy(), getHttpRequestRetryHandler(), getRedirectHandler(), getTargetAuthenticationHandler(), getProxyAuthenticationHandler(), getUserTokenHandler(), determineParams(request));
    }
    try {
        return director.execute(target, request, execContext);
    } catch (HttpException httpException) {
        throw new ClientProtocolException(httpException);
    }
}

Example 14 with HttpException

use of org.apache.http.HttpException in project platform_external_apache-http by android.

the class Connection method processRequests.

/**
     * Process requests in queue
     * pipelines requests
     */
void processRequests(Request firstRequest) {
    Request req = null;
    boolean empty;
    int error = EventHandler.OK;
    Exception exception = null;
    LinkedList<Request> pipe = new LinkedList<Request>();
    int minPipe = MIN_PIPE, maxPipe = MAX_PIPE;
    int state = SEND;
    while (state != DONE) {
        if (HttpLog.LOGV)
            HttpLog.v(states[state] + " pipe " + pipe.size());
        /* If a request was cancelled, give other cancel requests
               some time to go through so we don't uselessly restart
               connections */
        if (mActive == STATE_CANCEL_REQUESTED) {
            try {
                Thread.sleep(100);
            } catch (InterruptedException x) {
            /* ignore */
            }
            mActive = STATE_NORMAL;
        }
        switch(state) {
            case SEND:
                {
                    if (pipe.size() == maxPipe) {
                        state = READ;
                        break;
                    }
                    /* get a request */
                    if (firstRequest == null) {
                        req = mRequestFeeder.getRequest(mHost);
                    } else {
                        req = firstRequest;
                        firstRequest = null;
                    }
                    if (req == null) {
                        state = DRAIN;
                        break;
                    }
                    req.setConnection(this);
                    /* Don't work on cancelled requests. */
                    if (req.mCancelled) {
                        if (HttpLog.LOGV)
                            HttpLog.v("processRequests(): skipping cancelled request " + req);
                        req.complete();
                        break;
                    }
                    if (mHttpClientConnection == null || !mHttpClientConnection.isOpen()) {
                        if (!openHttpConnection(req)) {
                            state = DONE;
                            break;
                        }
                    }
                    /* we have a connection, let the event handler
                     * know of any associated certificate,
                     * potentially none.
                     */
                    req.mEventHandler.certificate(mCertificate);
                    try {
                        /* FIXME: don't increment failure count if old
                           connection?  There should not be a penalty for
                           attempting to reuse an old connection */
                        req.sendRequest(mHttpClientConnection);
                    } catch (HttpException e) {
                        exception = e;
                        error = EventHandler.ERROR;
                    } catch (IOException e) {
                        exception = e;
                        error = EventHandler.ERROR_IO;
                    } catch (IllegalStateException e) {
                        exception = e;
                        error = EventHandler.ERROR_IO;
                    }
                    if (exception != null) {
                        if (httpFailure(req, error, exception) && !req.mCancelled) {
                            /* retry request if not permanent failure
                               or cancelled */
                            pipe.addLast(req);
                        }
                        exception = null;
                        state = clearPipe(pipe) ? DONE : SEND;
                        minPipe = maxPipe = 1;
                        break;
                    }
                    pipe.addLast(req);
                    if (!mCanPersist)
                        state = READ;
                    break;
                }
            case DRAIN:
            case READ:
                {
                    empty = !mRequestFeeder.haveRequest(mHost);
                    int pipeSize = pipe.size();
                    if (state != DRAIN && pipeSize < minPipe && !empty && mCanPersist) {
                        state = SEND;
                        break;
                    } else if (pipeSize == 0) {
                        /* Done if no other work to do */
                        state = empty ? DONE : SEND;
                        break;
                    }
                    req = (Request) pipe.removeFirst();
                    if (HttpLog.LOGV)
                        HttpLog.v("processRequests() reading " + req);
                    try {
                        req.readResponse(mHttpClientConnection);
                    } catch (ParseException e) {
                        exception = e;
                        error = EventHandler.ERROR_IO;
                    } catch (IOException e) {
                        exception = e;
                        error = EventHandler.ERROR_IO;
                    } catch (IllegalStateException e) {
                        exception = e;
                        error = EventHandler.ERROR_IO;
                    }
                    if (exception != null) {
                        if (httpFailure(req, error, exception) && !req.mCancelled) {
                            /* retry request if not permanent failure
                               or cancelled */
                            req.reset();
                            pipe.addFirst(req);
                        }
                        exception = null;
                        mCanPersist = false;
                    }
                    if (!mCanPersist) {
                        if (HttpLog.LOGV)
                            HttpLog.v("processRequests(): no persist, closing " + mHost);
                        closeConnection();
                        mHttpContext.removeAttribute(HTTP_CONNECTION);
                        clearPipe(pipe);
                        minPipe = maxPipe = 1;
                        state = SEND;
                    }
                    break;
                }
        }
    }
}

Example 15 with HttpException

use of org.apache.http.HttpException in project platform_external_apache-http by android.

the class SSLConnectionClosedByUserException method openConnection.

/**
     * Opens the connection to a http server or proxy.
     *
     * @return the opened low level connection
     * @throws IOException if the connection fails for any reason.
     */
@Override
AndroidHttpClientConnection openConnection(Request req) throws IOException {
    SSLSocket sslSock = null;
    if (mProxyHost != null) {
        // If we have a proxy set, we first send a CONNECT request
        // to the proxy; if the proxy returns 200 OK, we negotiate
        // a secure connection to the target server via the proxy.
        // If the request fails, we drop it, but provide the event
        // handler with the response status and headers. The event
        // handler is then responsible for cancelling the load or
        // issueing a new request.
        AndroidHttpClientConnection proxyConnection = null;
        Socket proxySock = null;
        try {
            proxySock = new Socket(mProxyHost.getHostName(), mProxyHost.getPort());
            proxySock.setSoTimeout(60 * 1000);
            proxyConnection = new AndroidHttpClientConnection();
            HttpParams params = new BasicHttpParams();
            HttpConnectionParams.setSocketBufferSize(params, 8192);
            proxyConnection.bind(proxySock, params);
        } catch (IOException e) {
            if (proxyConnection != null) {
                proxyConnection.close();
            }
            String errorMessage = e.getMessage();
            if (errorMessage == null) {
                errorMessage = "failed to establish a connection to the proxy";
            }
            throw new IOException(errorMessage);
        }
        StatusLine statusLine = null;
        int statusCode = 0;
        Headers headers = new Headers();
        try {
            BasicHttpRequest proxyReq = new BasicHttpRequest("CONNECT", mHost.toHostString());
            // 400 Bad Request
            for (Header h : req.mHttpRequest.getAllHeaders()) {
                String headerName = h.getName().toLowerCase(Locale.ROOT);
                if (headerName.startsWith("proxy") || headerName.equals("keep-alive") || headerName.equals("host")) {
                    proxyReq.addHeader(h);
                }
            }
            proxyConnection.sendRequestHeader(proxyReq);
            proxyConnection.flush();
            // a loop is a standard way of dealing with them
            do {
                statusLine = proxyConnection.parseResponseHeader(headers);
                statusCode = statusLine.getStatusCode();
            } while (statusCode < HttpStatus.SC_OK);
        } catch (ParseException e) {
            String errorMessage = e.getMessage();
            if (errorMessage == null) {
                errorMessage = "failed to send a CONNECT request";
            }
            throw new IOException(errorMessage);
        } catch (HttpException e) {
            String errorMessage = e.getMessage();
            if (errorMessage == null) {
                errorMessage = "failed to send a CONNECT request";
            }
            throw new IOException(errorMessage);
        } catch (IOException e) {
            String errorMessage = e.getMessage();
            if (errorMessage == null) {
                errorMessage = "failed to send a CONNECT request";
            }
            throw new IOException(errorMessage);
        }
        if (statusCode == HttpStatus.SC_OK) {
            try {
                sslSock = (SSLSocket) getSocketFactory().createSocket(proxySock, mHost.getHostName(), mHost.getPort(), true);
            } catch (IOException e) {
                if (sslSock != null) {
                    sslSock.close();
                }
                String errorMessage = e.getMessage();
                if (errorMessage == null) {
                    errorMessage = "failed to create an SSL socket";
                }
                throw new IOException(errorMessage);
            }
        } else {
            // if the code is not OK, inform the event handler
            ProtocolVersion version = statusLine.getProtocolVersion();
            req.mEventHandler.status(version.getMajor(), version.getMinor(), statusCode, statusLine.getReasonPhrase());
            req.mEventHandler.headers(headers);
            req.mEventHandler.endData();
            proxyConnection.close();
            // request needs to be dropped
            return null;
        }
    } else {
        // if we do not have a proxy, we simply connect to the host
        try {
            sslSock = (SSLSocket) getSocketFactory().createSocket(mHost.getHostName(), mHost.getPort());
            sslSock.setSoTimeout(SOCKET_TIMEOUT);
        } catch (IOException e) {
            if (sslSock != null) {
                sslSock.close();
            }
            String errorMessage = e.getMessage();
            if (errorMessage == null) {
                errorMessage = "failed to create an SSL socket";
            }
            throw new IOException(errorMessage);
        }
    }
    // do handshake and validate server certificates
    SslError error = CertificateChainValidator.getInstance().doHandshakeAndValidateServerCertificates(this, sslSock, mHost.getHostName());
    // Inform the user if there is a problem
    if (error != null) {
        // need to.
        synchronized (mSuspendLock) {
            mSuspended = true;
        }
        // don't hold the lock while calling out to the event handler
        boolean canHandle = req.getEventHandler().handleSslErrorRequest(error);
        if (!canHandle) {
            throw new IOException("failed to handle " + error);
        }
        synchronized (mSuspendLock) {
            if (mSuspended) {
                try {
                    // Put a limit on how long we are waiting; if the timeout
                    // expires (which should never happen unless you choose
                    // to ignore the SSL error dialog for a very long time),
                    // we wake up the thread and abort the request. This is
                    // to prevent us from stalling the network if things go
                    // very bad.
                    mSuspendLock.wait(10 * 60 * 1000);
                    if (mSuspended) {
                        // mSuspended is true if we have not had a chance to
                        // restart the connection yet (ie, the wait timeout
                        // has expired)
                        mSuspended = false;
                        mAborted = true;
                        if (HttpLog.LOGV) {
                            HttpLog.v("HttpsConnection.openConnection():" + " SSL timeout expired and request was cancelled!!!");
                        }
                    }
                } catch (InterruptedException e) {
                // ignore
                }
            }
            if (mAborted) {
                // The user decided not to use this unverified connection
                // so close it immediately.
                sslSock.close();
                throw new SSLConnectionClosedByUserException("connection closed by the user");
            }
        }
    }
    // All went well, we have an open, verified connection.
    AndroidHttpClientConnection conn = new AndroidHttpClientConnection();
    BasicHttpParams params = new BasicHttpParams();
    params.setIntParameter(HttpConnectionParams.SOCKET_BUFFER_SIZE, 8192);
    conn.bind(sslSock, params);
    return conn;
}