org.apache.http.impl.client.HttpClientBuilder#setDefaultHeaders()源码实例Demo

private HttpComponentsClientHttpRequestFactory getRequestFactory(final URL url, final String username, final String password, final SSLConnectionSocketFactory sslConnectionSocketFactory, final SSLContext sslContext) throws MalformedURLException {
    String theUser = username;
    String thePassword = password;
    String userInfo = url.getUserInfo();
    if (userInfo != null && theUser == null) {
        String[] userParts = userInfo.split(":");
        if (userParts.length > 0) {
            theUser = userParts[0];
        }
        if (userParts.length > 1) {
            thePassword = userParts[1];
        }
    }
    final HttpClientBuilder bldr = HttpClientBuilder.create().
            setDefaultCredentialsProvider(getCredentialsProvider(url, theUser, thePassword));
    bldr.setDefaultHeaders(Arrays.asList(new BasicHeader(HttpHeaders.CONTENT_TYPE, "application/json")));
    if (sslConnectionSocketFactory != null) {
        bldr.setSSLSocketFactory(sslConnectionSocketFactory);
    }
    if (sslContext != null) {
        bldr.setSslcontext(sslContext);
    }

    HttpClient httpClient = bldr.build();

    // RabbitMQ HTTP API currently does not support challenge/response for PUT methods.
    AuthCache authCache = new BasicAuthCache();
    BasicScheme basicScheme = new BasicScheme();
    authCache.put(new HttpHost(rootUri.getHost(), rootUri.getPort(), rootUri.getScheme()), basicScheme);
    final HttpClientContext ctx = HttpClientContext.create();
    ctx.setAuthCache(authCache);
    return new HttpComponentsClientHttpRequestFactory(httpClient) {
        @Override
        protected HttpContext createHttpContext(HttpMethod httpMethod, URI uri) {
            return ctx;
        }
    };
}
 

private HttpClientBuilder addUserPassAuth(HttpClientBuilder cb, BasicHttpAuthConfig auth) {
  /*
   * Send auth via headers as the credentials provider method of auth does not work when using
   * SSL.
   */
  byte[] encodedAuth =
      Base64.encodeBase64((auth.getUsername() + ":" + auth.getPassword()).getBytes());
  String authHeader = "Basic " + new String(encodedAuth);

  cb.setDefaultHeaders(Arrays.asList(new BasicHeader(HttpHeaders.AUTHORIZATION, authHeader)));

  return cb;
}
 

private CloseableHttpClient initClient(Builder builder) {
  HttpClientBuilder b = builder.builder;
  b.setConnectionManager(manager);
  ImmutableSet<Header> headers = 
    builder.defaultHeaders.build();
  if (!headers.isEmpty())
    b.setDefaultHeaders(headers);
  if (builder.userAgent != null)
    b.setUserAgent(builder.userAgent);
  return b.build();
}
 

@Override
public IHttpClient buildHttpClient(HttpClientConfig config)
{
    HttpClientBuilder builder = HttpClientBuilder.create();
    builder.setDefaultHeaders(config.createHeaders());
    if (config.hasCookieStore())
    {
        builder.setDefaultCookieStore(config.getCookieStore());
    }
    if (config.hasCredentials())
    {
        AuthScope authScope = config.hasAuthScope() ? config.getAuthScope()
                : ClientBuilderUtils.DEFAULT_AUTH_SCOPE;
        CredentialsProvider credProvider = ClientBuilderUtils.createCredentialsProvider(authScope,
                config.getCredentials());
        builder.setDefaultCredentialsProvider(credProvider);
    }

    sslContextFactory.getSslContext(SSLConnectionSocketFactory.SSL, !config.isSslCertificateCheckEnabled())
            .ifPresent(builder::setSSLContext);

    if (!config.isSslHostnameVerificationEnabled())
    {
        builder.setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE);
    }
    builder.setConnectionManager(config.getConnectionManager());
    builder.setMaxConnTotal(config.getMaxTotalConnections());
    builder.setMaxConnPerRoute(config.getMaxConnectionsPerRoute());
    builder.addInterceptorLast(config.getLastRequestInterceptor());
    builder.addInterceptorLast(config.getLastResponseInterceptor());
    builder.setRedirectStrategy(config.getRedirectStrategy());
    builder.setRetryHandler(config.getHttpRequestRetryHandler());
    Builder requestConfigBuilder = RequestConfig.custom();
    requestConfigBuilder.setConnectionRequestTimeout(config.getConnectionRequestTimeout());
    requestConfigBuilder.setConnectTimeout(config.getConnectTimeout());
    requestConfigBuilder.setCircularRedirectsAllowed(config.isCircularRedirectsAllowed());
    requestConfigBuilder.setSocketTimeout(config.getSocketTimeout());
    Optional.ofNullable(config.getCookieSpec()).ifPresent(requestConfigBuilder::setCookieSpec);
    builder.setDefaultRequestConfig(requestConfigBuilder.build());
    builder.setDefaultSocketConfig(SocketConfig.copy(SocketConfig.DEFAULT)
            .setSoTimeout(config.getSocketTimeout())
            .build());
    builder.setDnsResolver(config.getDnsResolver());

    HttpClient httpClient = new HttpClient();
    httpClient.setCloseableHttpClient(builder.build());
    if (config.hasBaseUrl())
    {
        httpClient.setHttpHost(HttpHost.create(config.getBaseUrl()));
    }
    httpClient.setSkipResponseEntity(config.isSkipResponseEntity());
    return httpClient;
}
 

protected void initClient(DatabricksServiceFactory.Builder builder) {

    HttpClientBuilder clientBuilder = HttpClients.custom().useSystemProperties()
        .setRetryHandler(retryHandler)
        .setServiceUnavailableRetryStrategy(retryStrategy)
        .setDefaultRequestConfig(createRequestConfig(builder));

    List<Header> headers = new ArrayList<>();
    if (isNotEmpty(builder.getToken())) {
      Header authHeader = new BasicHeader("Authorization", String.format("Bearer %s", builder.getToken()));
      headers.add(authHeader);
    } else { // password authorization
      CredentialsProvider credsProvider = new BasicCredentialsProvider();
      credsProvider.setCredentials(
          new AuthScope(host, HTTPS_PORT),
          new UsernamePasswordCredentials(builder.getUsername(), builder.getPassword()));

      clientBuilder.setDefaultCredentialsProvider(credsProvider);

    }

    String userAgent = builder.getUserAgent();
    if (userAgent != null && userAgent.length() > 0) {
      Header userAgentHeader = new BasicHeader("User-Agent", userAgent);
      headers.add(userAgentHeader);
    }

    if (!headers.isEmpty()) {
      clientBuilder.setDefaultHeaders(headers);
    }

    try {
      SSLContext ctx = SSLContext.getDefault();
      // Allow TLSv1.2 protocol only
      SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
          ctx,
          new String[]{"TLSv1.2"},
          null,
          SSLConnectionSocketFactory.getDefaultHostnameVerifier());
      clientBuilder = clientBuilder.setSSLSocketFactory(sslsf);
    } catch (Exception e) {
      logger.error("", e);
    }

    client = clientBuilder.build(); //CloseableHttpClient

    url = String.format("https://%s/api/%s", host, apiVersion);
    mapper = new ObjectMapper().setSerializationInclusion(JsonInclude.Include.NON_DEFAULT);
  }
 

protected HttpClientBuilder getClientBuilder(boolean useSSL, String url,
    Map<String, String> stringHeaders, int socketTimeout) {

  HttpClientBuilder cb = HttpClientBuilder.create();

  /*
   * Setup SSL
   */
  if (useSSL) {
    /*
     * All trusting SSL context
     */
    try {
      cb.setSSLContext(getSSLContext());
    } catch (Exception e) {
      throw new RuntimeException(e);
    }

    /*
     * All trusting hostname verifier
     */
    cb.setSSLHostnameVerifier(new HostnameVerifier() {
      public boolean verify(String s, SSLSession sslSession) {
        return true;
      }
    });
  }

  /*
   * Add default headers
   */
  ArrayList<BasicHeader> headers = new ArrayList<BasicHeader>(stringHeaders.size());
  stringHeaders.forEach((k, v) -> headers.add(new BasicHeader(k, v)));
  cb.setDefaultHeaders(headers);

  /*
   * Set socket timeout and transport threads
   */
  SocketConfig sc = SocketConfig.custom().setSoTimeout(socketTimeout).build();
  cb.setDefaultSocketConfig(sc);
  cb.setMaxConnPerRoute(this.config.getThreads());
  cb.setMaxConnTotal(this.config.getThreads());

  return cb;
}
 

public HttpClient createClient() {
    HttpClientBuilder clientBuilder;
    if (connectionParams.useTlsConfigFromEnvironment()) {
        clientBuilder = VespaHttpClientBuilder.create();
    } else {
        clientBuilder = HttpClientBuilder.create();
        if (connectionParams.getSslContext() != null) {
            setSslContext(clientBuilder, connectionParams.getSslContext());
        } else {
            SslContextBuilder builder = new SslContextBuilder();
            if (connectionParams.getPrivateKey() != null && connectionParams.getCertificate() != null) {
                builder.withKeyStore(connectionParams.getPrivateKey(), connectionParams.getCertificate());
            }
            if (connectionParams.getCaCertificates() != null) {
                builder.withTrustStore(connectionParams.getCaCertificates());
            }
            setSslContext(clientBuilder, builder.build());
        }
        if (connectionParams.getHostnameVerifier() != null) {
            clientBuilder.setSSLHostnameVerifier(connectionParams.getHostnameVerifier());
        }
        clientBuilder.setUserTokenHandler(context -> null); // https://stackoverflow.com/a/42112034/1615280
    }
    clientBuilder.setMaxConnPerRoute(1);
    clientBuilder.setMaxConnTotal(1);
    clientBuilder.setConnectionTimeToLive(connectionParams.getConnectionTimeToLive().getSeconds(), TimeUnit.SECONDS);
    clientBuilder.setUserAgent(String.format("vespa-http-client (%s)", Vtag.currentVersion));
    clientBuilder.setDefaultHeaders(Collections.singletonList(new BasicHeader(Headers.CLIENT_VERSION, Vtag.currentVersion)));
    clientBuilder.disableContentCompression();
    // Try to disable the disabling to see if system tests become stable again.
    // clientBuilder.disableAutomaticRetries();
    RequestConfig.Builder requestConfigBuilder = RequestConfig.custom();
    requestConfigBuilder.setSocketTimeout(0);
    if (connectionParams.getProxyHost() != null) {
        requestConfigBuilder.setProxy(new HttpHost(connectionParams.getProxyHost(), connectionParams.getProxyPort()));
    }
    clientBuilder.setDefaultRequestConfig(requestConfigBuilder.build());

    log.fine("Creating HttpClient: " + " ConnectionTimeout "
                    + " SocketTimeout 0 secs "
                    + " proxyhost (can be null) " + connectionParams.getProxyHost()
                    + ":" + connectionParams.getProxyPort()
                    + (useSsl ? " using ssl " : " not using ssl")
    );
    return clientBuilder.build();
}