Java HttpClientContext.adapt方法代码示例

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
public void authSucceeded(
        final HttpHost authhost, final AuthScheme authScheme, final HttpContext context) {
    Args.notNull(authhost, "Host");
    Args.notNull(authScheme, "Auth scheme");
    Args.notNull(context, "HTTP context");

    final HttpClientContext clientContext = HttpClientContext.adapt(context);

    if (isCachable(authScheme)) {
        AuthCache authCache = clientContext.getAuthCache();
        if (authCache == null) {
            authCache = new BasicAuthCache();
            clientContext.setAuthCache(authCache);
        }
        if (Log.isLoggable(TAG, Log.DEBUG)) {
            Log.d(TAG, "Caching '" + authScheme.getSchemeName() +
                    "' auth scheme for " + authhost);
        }
        authCache.put(authhost, authScheme);
    }
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
public void upgrade(
        final ManagedHttpClientConnection conn,
        final HttpHost host,
        final HttpContext context) throws IOException {
    final HttpClientContext clientContext = HttpClientContext.adapt(context);
    final Lookup<ConnectionSocketFactory> registry = getSocketFactoryRegistry(clientContext);
    final ConnectionSocketFactory sf = registry.lookup(host.getSchemeName());
    if (sf == null) {
        throw new UnsupportedSchemeException(host.getSchemeName() +
                " protocol is not supported");
    }
    if (!(sf instanceof LayeredConnectionSocketFactory)) {
        throw new UnsupportedSchemeException(host.getSchemeName() +
                " protocol does not support connection upgrade");
    }
    final LayeredConnectionSocketFactory lsf = (LayeredConnectionSocketFactory) sf;
    Socket sock = conn.getSocket();
    final int port = this.schemePortResolver.resolve(host);
    sock = lsf.createLayeredSocket(sock, host.getHostName(), port, context);
    conn.bind(sock);
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
private String getServicePrincipalName(final HttpContext context) {
    final String spn;
    if (this.servicePrincipalName != null) {
        spn = this.servicePrincipalName;
    } else {
        final HttpClientContext clientContext = HttpClientContext.adapt(context);
        final HttpHost target = clientContext.getTargetHost();
        if (target != null) {
            spn = "HTTP/" + target.getHostName();
        } else {
            final RouteInfo route = clientContext.getHttpRoute();
            if (route != null) {
                spn = "HTTP/" + route.getTargetHost().getHostName();
            } else {
                // Should not happen
                spn = null;
            }
        }
    }
    if (this.log.isDebugEnabled()) {
        this.log.debug("Using SPN: " + spn);
    }
    return spn;
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
@Override
public boolean retryRequest(IOException exception, int executionCount, HttpContext context) {
    if (executionCount >= 5) {// 如果已经重试了5次，就放弃
        return false;
    }
    if (exception instanceof NoHttpResponseException) {// 如果服务器丢掉了连接，那么就重试
        return true;
    }
    if (exception instanceof InterruptedIOException) {// 超时
        return false;
    }
    if (exception instanceof SSLHandshakeException) {// 不要重试SSL握手异常
        return false;
    }
    if (exception instanceof UnknownHostException) {// 目标服务器不可达
        return false;
    }
    if (exception instanceof ConnectTimeoutException) {// 连接被拒绝
        return false;
    }
    if (exception instanceof SSLException) {// SSL握手异常
        return false;
    }
    HttpClientContext clientContext = HttpClientContext.adapt(context);
    HttpRequest request = clientContext.getRequest();
    // 如果请求是幂等的，就再次尝试
    if (!(request instanceof HttpEntityEnclosingRequest)) {
        return true;
    }
    return false;
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
@Override
public boolean retryRequest(IOException exception, int executionCount, HttpContext context){
	if(logOnRetry){
		HttpClientContext clientContext = HttpClientContext.adapt(context);
		logger.warn("Request {} failure Nº {}", clientContext.getRequest().getRequestLine(), executionCount,
				exception);
	}
	Object retrySafe = context.getAttribute(RETRY_SAFE_ATTRIBUTE);
	if(retrySafe == null || !(retrySafe instanceof Boolean) || !(Boolean)retrySafe || executionCount > retryCount){
		return false;
	}
	return true;
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
@Override
public void authSucceeded(final HttpHost authhost, final AuthScheme authScheme, final HttpContext context) {
    final HttpClientContext clientContext = HttpClientContext.adapt(context);
    final Credentials credentials = clientContext.getAttribute(PROXY_CREDENTIALS_INPUT_ID, Credentials.class);
    if(null != credentials) {
        clientContext.removeAttribute(PROXY_CREDENTIALS_INPUT_ID);
        if(log.isInfoEnabled()) {
            log.info(String.format("Save passphrase for proxy %s", authhost));
        }
        keychain.addCredentials(authhost.getHostName(), credentials.getUsername(), credentials.getPassword());
    }
    super.authSucceeded(authhost, authScheme, context);
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
@Override
public boolean retryRequest(IOException exception, int executionCount, HttpContext context) {

    if (executionCount >= 3) {// 如果已经重试了3次，就放弃
        return false;
    }

    if (exception instanceof NoHttpResponseException) {// 如果服务器丢掉了连接，那么就重试
        return true;
    }

    if (exception instanceof SSLHandshakeException) {// 不要重试SSL握手异常
        return false;
    }

    if (exception instanceof InterruptedIOException) {// 超时
        return true;
    }

    if (exception instanceof UnknownHostException) {// 目标服务器不可达
        return false;
    }

    if (exception instanceof ConnectTimeoutException) {// 连接被拒绝
        return false;
    }

    if (exception instanceof SSLException) {// ssl握手异常
        return false;
    }

    HttpClientContext clientContext = HttpClientContext.adapt(context);
    HttpRequest request = clientContext.getRequest();

    // 如果请求是幂等的，就再次尝试
    if (!(request instanceof HttpEntityEnclosingRequest)) {
        return true;
    }
    return false;
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
@Override
protected HttpHost determineProxy(HttpHost host, HttpRequest request, HttpContext context) throws HttpException {
    HttpClientContext httpClientContext = HttpClientContext.adapt(context);
    Proxy proxy = proxyPlanner.determineProxy(host, request, context, ipPool, crawlerSession);

    if (proxy == null) {
        return null;
    }
    if (log.isDebugEnabled()) {
        log.debug("{} 当前使用IP为:{}:{}", host.getHostName(), proxy.getIp(), proxy.getPort());
    }
    context.setAttribute(VSCRAWLER_AVPROXY_KEY, proxy);

    if (proxy.getAuthenticationHeaders() != null) {
        for (Header header : proxy.getAuthenticationHeaders()) {
            request.addHeader(header);
        }
    }

    if (StringUtils.isNotEmpty(proxy.getUsername()) && StringUtils.isNotEmpty(proxy.getPassword())) {
        BasicCredentialsProvider credsProvider1 = new BasicCredentialsProvider();
        httpClientContext.setCredentialsProvider(credsProvider1);
        credsProvider1.setCredentials(AuthScope.ANY,
                new UsernamePasswordCredentials(proxy.getUsername(), proxy.getPassword()));
    }
    return new HttpHost(proxy.getIp(), proxy.getPort());
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
@Override
public Proxy determineProxy(HttpHost host, HttpRequest request, HttpContext context, IPPool ipPool,
        CrawlerSession crawlerSession) {
    HttpClientContext httpClientContext = HttpClientContext.adapt(context);

    Proxy proxy = (Proxy) crawlerSession.getExtInfo(VSCRAWLER_AVPROXY_KEY);
    if (proxy == null) {
        String accessUrl = null;
        if (request instanceof HttpRequestWrapper || request instanceof HttpGet) {
            accessUrl = HttpUriRequest.class.cast(request).getURI().toString();
        }
        if (!PoolUtil.isDungProxyEnabled(httpClientContext)) {
            log.info("{}不会被代理", accessUrl);
            return null;
        }
        proxy = ipPool.getIP(host.getHostName(), accessUrl);
        if (proxy == null) {
            return null;
        }
        crawlerSession.setExtInfo(VSCRAWLER_AVPROXY_KEY, proxy);
    }

    return proxy;
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
@Override
public void upgrade(
        final ManagedHttpClientConnection conn,
        final HttpHost host,
        final HttpContext context) throws IOException {
    final HttpClientContext clientContext = HttpClientContext.adapt(context);
    final Lookup<ConnectionSocketFactory> registry = getSocketFactoryRegistry(clientContext);
    final ConnectionSocketFactory sf = registry.lookup(host.getSchemeName());
    if (sf == null) {
        throw new UnsupportedSchemeException(host.getSchemeName() +
                " protocol is not supported");
    }
    if (!(sf instanceof LayeredConnectionSocketFactory)) {
        throw new UnsupportedSchemeException(host.getSchemeName() +
                " protocol does not support connection upgrade");
    }
    final LayeredConnectionSocketFactory lsf = (LayeredConnectionSocketFactory) sf;
    Socket sock = conn.getSocket();
    final int port = this.schemePortResolver.resolve(host);
    sock = lsf.createLayeredSocket(sock, host.getHostName(), port, context);
    conn.bind(sock);
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
public boolean retryRequest(
        IOException exception,
        int executionCount,
        HttpContext context) {
    if (executionCount >= 5) {
        // Do not retry if over max retry count
        return false;
    }
    if (exception instanceof InterruptedIOException) {
        // Timeout
        return false;
    }
    if (exception instanceof UnknownHostException) {
        // Unknown host
        return false;
    }
    if (exception instanceof ConnectTimeoutException) {
        // Connection refused
        return false;
    }
    if (exception instanceof SSLException) {
        // SSL handshake exception
        return false;
    }
    HttpClientContext clientContext = HttpClientContext.adapt(context);
    HttpRequest request = clientContext.getRequest();
    boolean idempotent = !(request instanceof HttpEntityEnclosingRequest);
    if (idempotent) {
        // Retry if the request is considered idempotent
        return true;
    }
    return false;
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
/**
 * 自定义的恢复策略
 */
public boolean retryRequest(IOException exception, int exceptionCount,
		HttpContext context) {
	if (exceptionCount >= 3)
		return false;
	if (exception instanceof InterruptedIOException) {
		return false;
	}
	if (exception instanceof UnknownHostException) {
		return false;
	}
	if (exception instanceof ConnectTimeoutException) {
		return false;
	}
	if (exception instanceof SSLException) {
		return false;
	}
	HttpClientContext clientContext = HttpClientContext.adapt(context);
	HttpRequest request = clientContext.getRequest();
	boolean idempotent = !(request instanceof HttpEntityEnclosingRequest);
	if (idempotent) {
		return true;
	}
	return false;
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
public void authFailed(
        final HttpHost authhost, final AuthScheme authScheme, final HttpContext context) {
    Args.notNull(authhost, "Host");
    Args.notNull(context, "HTTP context");

    final HttpClientContext clientContext = HttpClientContext.adapt(context);

    final AuthCache authCache = clientContext.getAuthCache();
    if (authCache != null) {
        if (Log.isLoggable(TAG, Log.DEBUG)) {
            Log.d(TAG, "Clearing cached auth scheme for " + authhost);
        }
        authCache.remove(authhost);
    }
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
/**
 * Used <code>retryCount</code> and <code>requestSentRetryEnabled</code> to determine
 * if the given method should be retried.
 */
public boolean retryRequest(
        final IOException exception,
        final int executionCount,
        final HttpContext context) {
    Args.notNull(exception, "Exception parameter");
    Args.notNull(context, "HTTP context");
    if (executionCount > this.retryCount) {
        // Do not retry if over max retry count
        return false;
    }
    if (this.nonRetriableClasses.contains(exception.getClass())) {
        return false;
    } else {
        for (final Class<? extends IOException> rejectException : this.nonRetriableClasses) {
            if (rejectException.isInstance(exception)) {
                return false;
            }
        }
    }
    final HttpClientContext clientContext = HttpClientContext.adapt(context);
    final HttpRequest request = clientContext.getRequest();

    if(requestIsAborted(request)){
        return false;
    }

    if (handleAsIdempotent(request)) {
        // Retry if the request is considered idempotent
        return true;
    }

    if (!clientContext.isRequestSent() || this.requestSentRetryEnabled) {
        // Retry if the request has not been sent fully or
        // if it's OK to retry methods that have been sent
        return true;
    }
    // otherwise do not retry
    return false;
}
 

import org.apache.http.client.protocol.HttpClientContext; //导入方法依赖的package包/类
public Object getUserToken(final HttpContext context) {

        final HttpClientContext clientContext = HttpClientContext.adapt(context);

        Principal userPrincipal = null;

        final AuthStateHC4 targetAuthState = clientContext.getTargetAuthState();
        if (targetAuthState != null) {
            userPrincipal = getAuthPrincipal(targetAuthState);
            if (userPrincipal == null) {
                final AuthStateHC4 proxyAuthState = clientContext.getProxyAuthState();
                userPrincipal = getAuthPrincipal(proxyAuthState);
            }
        }

        if (userPrincipal == null) {
            final HttpConnection conn = clientContext.getConnection();
            if (conn.isOpen() && conn instanceof ManagedHttpClientConnection) {
                final SSLSession sslsession = ((ManagedHttpClientConnection) conn).getSSLSession();
                if (sslsession != null) {
                    userPrincipal = sslsession.getLocalPrincipal();
                }
            }
        }

        return userPrincipal;
    }