FastHttpClient 基于 apache HttpClient 5.0 进一步封装, 提供方便的API

╰+哭是因爲堅強的太久メ 2023-02-23 03:57 26阅读 0赞

**添加依赖**

<dependency>
    	<groupId>org.apache.httpcomponents.client5</groupId>
    	<artifactId>httpclient5</artifactId>
    	<version>5.0</version>
    </dependency>

**FastHttpClient.java**

import org.apache.hc.client5.http.classic.methods.HttpDelete;
    import org.apache.hc.client5.http.classic.methods.HttpGet;
    import org.apache.hc.client5.http.classic.methods.HttpPost;
    import org.apache.hc.client5.http.classic.methods.HttpPut;
    import org.apache.hc.client5.http.config.RequestConfig;
    import org.apache.hc.client5.http.cookie.BasicCookieStore;
    import org.apache.hc.client5.http.cookie.Cookie;
    import org.apache.hc.client5.http.cookie.CookieStore;
    import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
    import org.apache.hc.client5.http.impl.classic.CloseableHttpResponse;
    import org.apache.hc.client5.http.impl.classic.HttpClients;
    import org.apache.hc.client5.http.impl.cookie.BasicClientCookie;
    import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager;
    import org.apache.hc.client5.http.protocol.HttpClientContext;
    import org.apache.hc.core5.http.ClassicHttpRequest;
    import org.apache.hc.core5.http.ClassicHttpResponse;
    import org.apache.hc.core5.http.HttpEntity;
    import org.apache.hc.core5.http.HttpHost;
    import org.apache.hc.core5.http.ProtocolVersion;
    import org.apache.hc.core5.http.io.entity.EntityUtils;
    import org.apache.hc.core5.util.Asserts;
    
    import java.io.File;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.UnsupportedEncodingException;
    import java.net.URLDecoder;
    import java.net.URLEncoder;
    import java.nio.charset.Charset;
    import java.nio.file.CopyOption;
    import java.nio.file.Files;
    import java.nio.file.Path;
    import java.util.Arrays;
    import java.util.Collections;
    import java.util.Locale;
    import java.util.Map;
    import java.util.Optional;
    import java.util.concurrent.TimeUnit;
    import java.util.stream.Collectors;
    
    /** * FastHttpClient 基于 apache HttpClient 5.0 进一步封装, 提供方便的API * 官网: http://hc.apache.org/httpcomponents-client-5.0.x/examples.html * <p> * 依赖: * <dependency> * <groupId>org.apache.httpcomponents.client5</groupId> * <artifactId>httpclient5</artifactId> * <version>5.0</version> * </dependency> * <p> * ------------------------------------------------------- 简单使用如下 ------------------------------------------------------- * <p> * =============== GET =============== * FastHttpClient httpClient = FastHttpClient.builder().build(); * HttpGet httpGet = httpClient.buildGet("https://www.baidu.com"); * Response<String> result = httpClient.execute(httpGet, ResponseHandler.ofString()); * String data = result.getData(); * <p> * =============== POST ============== * FastHttpClient httpClient = FastHttpClient.builder().build(); * HttpPost httpPost = httpClient.buildPost("https://search.jd.com/image?op=upload"); * httpPost.addHeader("cookie", "shshsh1"); * httpPost.addHeader("referer", "https://search.jd.com/image"); * httpPost.addHeader("user-agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.106 Safari/537.36"); * <p> * HttpEntity entity = MultipartEntityBuilder.create() * // 相当于<input type="file" name="file"/> * // .addPart("file", new FileBody(new File("C:\\Users\\houyu\\Desktop\\123.jpg"), ContentType.IMAGE_JPEG)) * .addBinaryBody("file", new File("C:\\Users\\houyu\\Desktop\\123.jpg"), ContentType.IMAGE_JPEG, "123.jpg") * // 添加文本内容 * // .addTextBody("type", "xxx") * .build(); * httpPost.setEntity(entity); * Response<String> result = httpClient.execute(httpPost, ResponseHandler.ofString()); * String data = result.getData(); * * @author for.houyu@qq.com */
    public class FastHttpClient { 
    
        /***/
        private CloseableHttpClient closeableHttpClient = null;
        /***/
        private final PoolingHttpClientConnectionManager manager;
        private final HttpClientContext context;
        private final RequestConfig requestConfig;
        private final String userAgent;
    
        private FastHttpClient(FastHttpClientBuilder builder) { 
            this.manager = builder.manager;
            this.context = builder.context;
            this.requestConfig = builder.requestConfig;
            this.userAgent = builder.userAgent;
            //
            this.init();
        }
    
        private void init() { 
            /** 自定义参数创建 */
            if (closeableHttpClient == null) { 
                closeableHttpClient = HttpClients.custom()
                        // 设置连接池管理器
                        .setConnectionManager(manager)
                        // 设置默认的请求配置
                        .setDefaultRequestConfig(requestConfig)
                        // 设置cookie管理 (这里不在这里使用cookie管理, 而是通过每次请求的时候手动设置context)
                        // .setDefaultCookieStore(cookieStore)
                        // 设置默认的 userAgent
                        .setUserAgent(userAgent)
                        // 构建
                        .build();
            }
        }
    
        public <T> Response<T> execute(ClassicHttpRequest request, ResponseHandler<T> responseHandler) { 
            handleCookie(request);
            try (CloseableHttpResponse response = this.closeableHttpClient.execute(request, this.context)) { 
                return responseHandler.handle(response, this);
            } catch (IOException e) { 
                throw new RuntimeException(e);
            }
        }
    
        public <T> Response<T> execute(HttpHost target, ClassicHttpRequest request, ResponseHandler<T> responseHandler) { 
            handleCookie(request);
            try (CloseableHttpResponse response = this.closeableHttpClient.execute(target, request, this.context)) { 
                return responseHandler.handle(response, this);
            } catch (IOException e) { 
                throw new RuntimeException(e);
            }
        }
    
        private ClassicHttpRequest handleCookie(ClassicHttpRequest request) { 
            String cookie;
            if (this.context != null && !request.containsHeader("cookie") && (cookie = this.getCookie()) != null) { 
                request.addHeader("cookie", cookie);
            }
            return request;
        }
    
        
    
        /** * 创建建造者 * * @return */
        public static FastHttpClientBuilder builder() { 
            return new FastHttpClientBuilder();
        }
    
        /** * 编码uri * * @param uri uri * @param charset charset */
        public static String encodeUri(String uri, Charset charset) { 
            if (uri.contains("?")) { 
                String[] split = uri.split("\\?", 2);
                return split[0] + "?" + Arrays.stream(split[1].split("&"))
                        .map(v -> v.split("=", 2))
                        .map(v -> v[0] + "=" + encodeURLText(v[1], charset))
                        .collect(Collectors.joining("&"));
            }
            return uri;
        }
    
        public static String encodeURLText(String text, Charset charset) { 
            try { 
                return URLEncoder.encode(text, charset.name());
            } catch (UnsupportedEncodingException e) { 
                throw new RuntimeException(e);
            }
        }
    
        public static String decodeURLText(String text, Charset charset) { 
            try { 
                return URLDecoder.decode(text, charset.name());
            } catch (UnsupportedEncodingException e) { 
                throw new RuntimeException(e);
            }
        }
    
        
    
        private String fixUri(String uri) { 
            if (uri.startsWith("//")) { 
                return "http:" + uri;
            } else if (uri.startsWith("://")) { 
                return "http" + uri;
            } else if (!uri.toLowerCase().startsWith("http")) { 
                return "http://" + uri;
            }
            return uri;
        }
    
        public HttpGet buildGet(String uri) { 
            return new HttpGet(fixUri(uri));
        }
    
        public HttpPost buildPost(String uri) { 
            return new HttpPost(fixUri(uri));
        }
    
        public HttpPut buildPut(String uri) { 
            return new HttpPut(fixUri(uri));
        }
    
        public HttpDelete buildDelete(String uri) { 
            return new HttpDelete(fixUri(uri));
        }
    
        
    
        public CloseableHttpClient getCloseableHttpClient() { 
            return closeableHttpClient;
        }
    
        public PoolingHttpClientConnectionManager getManager() { 
            return manager;
        }
    
        public HttpClientContext getContext() { 
            return context;
        }
    
        public RequestConfig getRequestConfig() { 
            return requestConfig;
        }
    
        public String getCookie() { 
            return Optional.ofNullable(this.getContext())
                    .map(HttpClientContext::getCookieStore)
                    .map(CookieStore::getCookies)
                    .map(c -> c.stream().map(v -> v.getName() + "=" + v.getValue()).collect(Collectors.joining("; "))).orElse(null);
        }
    
        public Map<String, String> getCookieAsMap() { 
            return Optional.ofNullable(this.getContext())
                    .map(HttpClientContext::getCookieStore)
                    .map(CookieStore::getCookies)
                    .map(c -> c.stream().collect(Collectors.toMap(Cookie::getName, Cookie::getValue))).orElse(Collections.emptyMap());
        }
    
        
    
        /** * 响应处理器处理器 * * @param <T> */
        public interface ResponseHandler<T> { 
            /** * 下载回调 * * @param response 响应 * @param client fastHttpClient * @return * @throws RuntimeException */
            Response<T> handle(ClassicHttpResponse response, FastHttpClient client) throws RuntimeException;
    
            
    
            /** * 返回字符串 * * @param defaultCharset 默认字符集 */
            static ResponseHandler<String> ofString(Charset... defaultCharset) { 
                return (response, client) -> { 
                    try { 
                        Charset charset = defaultCharset != null && defaultCharset.length > 0 ? defaultCharset[0] : Charset.defaultCharset();
                        return Response.build(response, EntityUtils.toString(response.getEntity(), charset));
                    } catch (Exception e) { 
                        throw new RuntimeException(e);
                    }
                };
            }
    
            /** * 保存为文件 * * @param path 保存文件路径 * @param options StandardCopyOption: REPLACE_EXISTING(替换更新), COPY_ATTRIBUTES(复制属性), ATOMIC_MOVE(原子移动) */
            static ResponseHandler<File> ofFile(Path path, CopyOption... options) { 
                return (response, client) -> { 
                    File file = path.toFile();
                    if (!file.exists()) { 
                        file.getParentFile().mkdirs();
                    }
                    try (InputStream in = response.getEntity().getContent()) { 
                        Files.copy(in, path, options);
                    } catch (Exception e) { 
                        throw new RuntimeException(e);
                    }
                    return Response.build(response, file);
                };
            }
        }
    
        /** * 响应结果 * * @param <T> */
        public static class Response<T> { 
    
            private final int code;
            private final HttpEntity entity;
            private final T data;
            private final ProtocolVersion version;
            private final Locale locale;
            private final String reasonPhrase;
    
            public Response(int code, HttpEntity entity, T data, ProtocolVersion version, Locale locale, String reasonPhrase) { 
                this.code = code;
                this.entity = entity;
                this.data = data;
                this.version = version;
                this.locale = locale;
                this.reasonPhrase = reasonPhrase;
            }
    
            public static <T> Response<T> build(ClassicHttpResponse response, T data) { 
                return new Response<T>(response.getCode(), response.getEntity(), data, response.getVersion(), response.getLocale(), response.getReasonPhrase());
            }
    
            public int getCode() { 
                return code;
            }
    
            public HttpEntity getEntity() { 
                return entity;
            }
    
            public T getData() { 
                return data;
            }
    
            public ProtocolVersion getVersion() { 
                return version;
            }
    
            public Locale getLocale() { 
                return locale;
            }
    
            public String getReasonPhrase() { 
                return reasonPhrase;
            }
    
            @Override
            public String toString() { 
                final StringBuilder sb = new StringBuilder("Response{");
                sb.append("code=").append(code);
                sb.append(", entity=").append(entity);
                sb.append(", data=").append(data);
                sb.append(", version=").append(version);
                sb.append(", locale=").append(locale);
                sb.append(", reasonPhrase='").append(reasonPhrase).append('\'');
                sb.append('}');
                return sb.toString();
            }
        }
    
        /** * 建造者 */
        public static class FastHttpClientBuilder { 
    
            private PoolingHttpClientConnectionManager manager;
            private HttpClientContext context;
            private CookieStore cookieStore;
            private RequestConfig requestConfig;
            private String userAgent;
    
            public FastHttpClientBuilder() { 
                /** 创建连接池管理器 */
                manager = new PoolingHttpClientConnectionManager();
                // 设置总的连接最大数
                manager.setMaxTotal(100);
                // 设置单独路由的连接最大数
                manager.setDefaultMaxPerRoute(manager.getMaxTotal() / 2);
                /** 创建上下文 */
                context = HttpClientContext.create();
                cookieStore = new BasicCookieStore();
                context.setCookieStore(cookieStore);
                /** 创建默认的请求配置 */
                requestConfig = RequestConfig.custom()
                        // 设置启用重定向
                        .setRedirectsEnabled(true)
                        // 设置最大重定向次数
                        .setMaxRedirects(30)
                        // 设置默认的cookie
                        // .setCookieSpec(cookie)
                        // 设置连接超时
                        .setConnectTimeout(2, TimeUnit.MINUTES)
                        // 设置响应超时
                        .setResponseTimeout(2, TimeUnit.MINUTES)
                        // 设置请求参数
                        .setConnectionRequestTimeout(2, TimeUnit.MINUTES)
                        // 构建
                        .build();
                /** 设置默认的userAgent */
                userAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.106 Safari/537.36";
            }
    
            public FastHttpClient build() { 
                return new FastHttpClient(this);
            }
    
            public FastHttpClientBuilder setManager(PoolingHttpClientConnectionManager manager) { 
                Asserts.notNull(manager, "manager");
                this.manager = manager;
                return this;
            }
    
            public FastHttpClientBuilder setContext(HttpClientContext context) { 
                // Asserts.notNull(context, "context");
                this.context = context;
                return this;
            }
    
            public FastHttpClientBuilder setRequestConfig(RequestConfig requestConfig) { 
                Asserts.notNull(requestConfig, "requestConfig");
                this.requestConfig = requestConfig;
                return this;
            }
    
            public FastHttpClientBuilder setUserAgent(String userAgent) { 
                Asserts.notNull(userAgent, "userAgent");
                this.userAgent = userAgent;
                return this;
            }
    
            public FastHttpClientBuilder setCookie(String cookie) { 
                Asserts.notNull(cookie, "cookie");
                Asserts.notNull(context, "context");
                //
                if (!cookie.trim().isEmpty()) { 
                    this.cookieStore = context.getCookieStore() == null ? this.cookieStore : context.getCookieStore();
                    Arrays.stream(cookie.split("; ")).map(v -> v.split("=", 2)).forEach(v -> this.cookieStore.addCookie(new BasicClientCookie(v[0], v[1])));
                    context.setCookieStore(this.cookieStore);
                }
                return this;
            }
        }
    
        
    }
    
    /* public class ClientWithResponseHandler { public static void main(final String[] args) throws Exception { try (final CloseableHttpClient httpclient = HttpClients.createDefault()) { final HttpGet httpget = new HttpGet("http://httpbin.org/get"); System.out.println("Executing request " + httpget.getMethod() + " " + httpget.getUri()); // Create a custom response handler final HttpClientResponseHandler<String> responseHandler = new HttpClientResponseHandler<String>() { @Override public String handleResponse( final ClassicHttpResponse response) throws IOException { final int status = response.getCode(); if (status >= HttpStatus.SC_SUCCESS && status < HttpStatus.SC_REDIRECTION) { final HttpEntity entity = response.getEntity(); try { return entity != null ? EntityUtils.toString(entity) : null; } catch (final ParseException ex) { throw new ClientProtocolException(ex); } } else { throw new ClientProtocolException("Unexpected response status: " + status); } } }; final String responseBody = httpclient.execute(httpget, responseHandler); System.out.println("----------------------------------------"); System.out.println(responseBody); } } } */
    
    /* public class ClientConfiguration { public final static void main(final String[] args) throws Exception { // Use custom message parser / writer to customize the way HTTP // messages are parsed from and written out to the data stream. final HttpMessageParserFactory<ClassicHttpResponse> responseParserFactory = new DefaultHttpResponseParserFactory() { @Override public HttpMessageParser<ClassicHttpResponse> create(final Http1Config h1Config) { final LineParser lineParser = new BasicLineParser() { @Override public Header parseHeader(final CharArrayBuffer buffer) { try { return super.parseHeader(buffer); } catch (final ParseException ex) { return new BasicHeader(buffer.toString(), null); } } }; return new DefaultHttpResponseParser(lineParser, DefaultClassicHttpResponseFactory.INSTANCE, h1Config); } }; final HttpMessageWriterFactory<ClassicHttpRequest> requestWriterFactory = new DefaultHttpRequestWriterFactory(); // Create HTTP/1.1 protocol configuration final Http1Config h1Config = Http1Config.custom() .setMaxHeaderCount(200) .setMaxLineLength(2000) .build(); // Create connection configuration final CharCodingConfig connectionConfig = CharCodingConfig.custom() .setMalformedInputAction(CodingErrorAction.IGNORE) .setUnmappableInputAction(CodingErrorAction.IGNORE) .setCharset(StandardCharsets.UTF_8) .build(); // Use a custom connection factory to customize the process of // initialization of outgoing HTTP connections. Beside standard connection // configuration parameters HTTP connection factory can define message // parser / writer routines to be employed by individual connections. final HttpConnectionFactory<ManagedHttpClientConnection> connFactory = new ManagedHttpClientConnectionFactory( h1Config, connectionConfig, requestWriterFactory, responseParserFactory); // Client HTTP connection objects when fully initialized can be bound to // an arbitrary network socket. The process of network socket initialization, // its connection to a remote address and binding to a local one is controlled // by a connection socket factory. // SSL context for secure connections can be created either based on // system or application specific properties. final SSLContext sslcontext = SSLContexts.createSystemDefault(); // Create a registry of custom connection socket factories for supported // protocol schemes. final Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create() .register("http", PlainConnectionSocketFactory.INSTANCE) .register("https", new SSLConnectionSocketFactory(sslcontext)) .build(); // Use custom DNS resolver to override the system DNS resolution. final DnsResolver dnsResolver = new SystemDefaultDnsResolver() { @Override public InetAddress[] resolve(final String host) throws UnknownHostException { if (host.equalsIgnoreCase("myhost")) { return new InetAddress[] { InetAddress.getByAddress(new byte[] {127, 0, 0, 1}) }; } else { return super.resolve(host); } } }; // Create a connection manager with custom configuration. final PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager( socketFactoryRegistry, PoolConcurrencyPolicy.STRICT, PoolReusePolicy.LIFO, TimeValue.ofMinutes(5), null, dnsResolver, null); // Create socket configuration final SocketConfig socketConfig = SocketConfig.custom() .setTcpNoDelay(true) .build(); // Configure the connection manager to use socket configuration either // by default or for a specific host. connManager.setDefaultSocketConfig(socketConfig); // Validate connections after 1 sec of inactivity connManager.setValidateAfterInactivity(TimeValue.ofSeconds(10)); // Configure total max or per route limits for persistent connections // that can be kept in the pool or leased by the connection manager. connManager.setMaxTotal(100); connManager.setDefaultMaxPerRoute(10); connManager.setMaxPerRoute(new HttpRoute(new HttpHost("somehost", 80)), 20); // Use custom cookie store if necessary. final CookieStore cookieStore = new BasicCookieStore(); // Use custom credentials provider if necessary. final CredentialsProvider credentialsProvider = new BasicCredentialsProvider(); // Create global request configuration final RequestConfig defaultRequestConfig = RequestConfig.custom() .setCookieSpec(StandardCookieSpec.STRICT) .setExpectContinueEnabled(true) .setTargetPreferredAuthSchemes(Arrays.asList(StandardAuthScheme.NTLM, StandardAuthScheme.DIGEST)) .setProxyPreferredAuthSchemes(Arrays.asList(StandardAuthScheme.BASIC)) .build(); // Create an HttpClient with the given custom dependencies and configuration. try (final CloseableHttpClient httpclient = HttpClients.custom() .setConnectionManager(connManager) .setDefaultCookieStore(cookieStore) .setDefaultCredentialsProvider(credentialsProvider) .setProxy(new HttpHost("myproxy", 8080)) .setDefaultRequestConfig(defaultRequestConfig) .build()) { final HttpGet httpget = new HttpGet("http://httpbin.org/get"); // Request configuration can be overridden at the request level. // They will take precedence over the one set at the client level. final RequestConfig requestConfig = RequestConfig.copy(defaultRequestConfig) .setConnectionRequestTimeout(Timeout.ofSeconds(5)) .setConnectTimeout(Timeout.ofSeconds(5)) .setProxy(new HttpHost("myotherproxy", 8080)) .build(); httpget.setConfig(requestConfig); // Execution context can be customized locally. final HttpClientContext context = HttpClientContext.create(); // Contextual attributes set the local context level will take // precedence over those set at the client level. context.setCookieStore(cookieStore); context.setCredentialsProvider(credentialsProvider); System.out.println("Executing request " + httpget.getMethod() + " " + httpget.getUri()); try (final CloseableHttpResponse response = httpclient.execute(httpget, context)) { System.out.println("----------------------------------------"); System.out.println(response.getCode() + " " + response.getReasonPhrase()); System.out.println(EntityUtils.toString(response.getEntity())); // Once the request has been executed the local context can // be used to examine updated state and various objects affected // by the request execution. // Last executed request context.getRequest(); // Execution route context.getHttpRoute(); // Auth exchanges context.getAuthExchanges(); // Cookie origin context.getCookieOrigin(); // Cookie spec used context.getCookieSpec(); // User security token context.getUserToken(); } } } } */
    
    /* public class ClientFormLogin { public static void main(final String[] args) throws Exception { final BasicCookieStore cookieStore = new BasicCookieStore(); try (final CloseableHttpClient httpclient = HttpClients.custom() .setDefaultCookieStore(cookieStore) .build()) { final HttpGet httpget = new HttpGet("https://someportal/"); try (final CloseableHttpResponse response1 = httpclient.execute(httpget)) { final HttpEntity entity = response1.getEntity(); System.out.println("Login form get: " + response1.getCode() + " " + response1.getReasonPhrase()); EntityUtils.consume(entity); System.out.println("Initial set of cookies:"); final List<Cookie> cookies = cookieStore.getCookies(); if (cookies.isEmpty()) { System.out.println("None"); } else { for (int i = 0; i < cookies.size(); i++) { System.out.println("- " + cookies.get(i).toString()); } } } final ClassicHttpRequest login = ClassicRequestBuilder.post() .setUri(new URI("https://someportal/")) .addParameter("IDToken1", "username") .addParameter("IDToken2", "password") .build(); try (final CloseableHttpResponse response2 = httpclient.execute(login)) { final HttpEntity entity = response2.getEntity(); System.out.println("Login form get: " + response2.getCode() + " " + response2.getReasonPhrase()); EntityUtils.consume(entity); System.out.println("Post logon cookies:"); final List<Cookie> cookies = cookieStore.getCookies(); if (cookies.isEmpty()) { System.out.println("None"); } else { for (int i = 0; i < cookies.size(); i++) { System.out.println("- " + cookies.get(i).toString()); } } } } } } */
    
    /* public class ClientCustomSSL { public final static void main(final String[] args) throws Exception { // Trust standard CA and those trusted by our custom strategy final SSLContext sslcontext = SSLContexts.custom() .loadTrustMaterial(new TrustStrategy() { @Override public boolean isTrusted( final X509Certificate[] chain, final String authType) throws CertificateException { final X509Certificate cert = chain[0]; return "CN=httpbin.org".equalsIgnoreCase(cert.getSubjectDN().getName()); } }) .build(); // Allow TLSv1.2 protocol only final SSLConnectionSocketFactory sslSocketFactory = SSLConnectionSocketFactoryBuilder.create() .setSslContext(sslcontext) .setTlsVersions(TLS.V_1_2) .build(); final HttpClientConnectionManager cm = PoolingHttpClientConnectionManagerBuilder.create() .setSSLSocketFactory(sslSocketFactory) .build(); try (CloseableHttpClient httpclient = HttpClients.custom() .setConnectionManager(cm) .build()) { final HttpGet httpget = new HttpGet("https://httpbin.org/"); System.out.println("Executing request " + httpget.getMethod() + " " + httpget.getUri()); final HttpClientContext clientContext = HttpClientContext.create(); try (CloseableHttpResponse response = httpclient.execute(httpget, clientContext)) { System.out.println("----------------------------------------"); System.out.println(response.getCode() + " " + response.getReasonPhrase()); System.out.println(EntityUtils.toString(response.getEntity())); final SSLSession sslSession = clientContext.getSSLSession(); if (sslSession != null) { System.out.println("SSL protocol " + sslSession.getProtocol()); System.out.println("SSL cipher suite " + sslSession.getCipherSuite()); } } } } } */
    
    /* public class ClientExecuteProxy { public static void main(final String[] args)throws Exception { try (final CloseableHttpClient httpclient = HttpClients.createDefault()) { final HttpHost target = new HttpHost("https", "httpbin.org", 443); final HttpHost proxy = new HttpHost("http", "127.0.0.1", 8080); final RequestConfig config = RequestConfig.custom() .setProxy(proxy) .build(); final HttpGet request = new HttpGet("/get"); request.setConfig(config); System.out.println("Executing request " + request.getMethod() + " " + request.getUri() + " via " + proxy); try (final CloseableHttpResponse response = httpclient.execute(target, request)) { System.out.println("----------------------------------------"); System.out.println(response.getCode() + " " + response.getReasonPhrase()); System.out.println(EntityUtils.toString(response.getEntity())); } } } } */
    
    /* public class ClientMultiThreadedExecution { public static void main(final String[] args) throws Exception { // Create an HttpClient with the PoolingHttpClientConnectionManager. // This connection manager must be used if more than one thread will // be using the HttpClient. final PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(); cm.setMaxTotal(100); try (final CloseableHttpClient httpclient = HttpClients.custom() .setConnectionManager(cm) .build()) { // create an array of URIs to perform GETs on final String[] urisToGet = { "http://hc.apache.org/", "http://hc.apache.org/httpcomponents-core-ga/", "http://hc.apache.org/httpcomponents-client-ga/", }; // create a thread for each URI final GetThread[] threads = new GetThread[urisToGet.length]; for (int i = 0; i < threads.length; i++) { final HttpGet httpget = new HttpGet(urisToGet[i]); threads[i] = new GetThread(httpclient, httpget, i + 1); } // start the threads for (final GetThread thread : threads) { thread.start(); } // join the threads for (final GetThread thread : threads) { thread.join(); } } } static class GetThread extends Thread { private final CloseableHttpClient httpClient; private final HttpContext context; private final HttpGet httpget; private final int id; public GetThread(final CloseableHttpClient httpClient, final HttpGet httpget, final int id) { this.httpClient = httpClient; this.context = new BasicHttpContext(); this.httpget = httpget; this.id = id; } @Override public void run() { try { System.out.println(id + " - about to get something from " + httpget.getUri()); try (CloseableHttpResponse response = httpClient.execute(httpget, context)) { System.out.println(id + " - get executed"); // get the response body as an array of bytes final HttpEntity entity = response.getEntity(); if (entity != null) { final byte[] bytes = EntityUtils.toByteArray(entity); System.out.println(id + " - " + bytes.length + " bytes read"); } } } catch (final Exception e) { System.out.println(id + " - error: " + e); } } } } */
    
    /* public class ClientInterceptors { public static void main(final String[] args) throws Exception { try (final CloseableHttpClient httpclient = HttpClients.custom() // Add a simple request ID to each outgoing request .addRequestInterceptorFirst(new HttpRequestInterceptor() { private final AtomicLong count = new AtomicLong(0); @Override public void process( final HttpRequest request, final EntityDetails entity, final HttpContext context) throws HttpException, IOException { request.setHeader("request-id", Long.toString(count.incrementAndGet())); } }) // Simulate a 404 response for some requests without passing the message down to the backend .addExecInterceptorAfter(ChainElement.PROTOCOL.name(), "custom", new ExecChainHandler() { @Override public ClassicHttpResponse execute( final ClassicHttpRequest request, final ExecChain.Scope scope, final ExecChain chain) throws IOException, HttpException { final Header idHeader = request.getFirstHeader("request-id"); if (idHeader != null && "13".equalsIgnoreCase(idHeader.getValue())) { final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_NOT_FOUND, "Oppsie"); response.setEntity(new StringEntity("bad luck", ContentType.TEXT_PLAIN)); return response; } else { return chain.proceed(request, scope); } } }) .build()) { for (int i = 0; i < 20; i++) { final HttpGet httpget = new HttpGet("http://httpbin.org/get"); System.out.println("Executing request " + httpget.getMethod() + " " + httpget.getUri()); try (final CloseableHttpResponse response = httpclient.execute(httpget)) { System.out.println("----------------------------------------"); System.out.println(response.getCode() + " " + response.getReasonPhrase()); System.out.println(EntityUtils.toString(response.getEntity())); } } } } } */
    
    /* public class ClientMultipartFormPost { public static void main(final String[] args) throws Exception { if (args.length != 1) { System.out.println("File path not given"); System.exit(1); } try (final CloseableHttpClient httpclient = HttpClients.createDefault()) { final HttpPost httppost = new HttpPost("http://localhost:8080" + "/servlets-examples/servlet/RequestInfoExample"); final FileBody bin = new FileBody(new File(args[0])); final StringBody comment = new StringBody("A binary file of some kind", ContentType.TEXT_PLAIN); final HttpEntity reqEntity = MultipartEntityBuilder.create() .addPart("bin", bin) .addPart("comment", comment) .build(); httppost.setEntity(reqEntity); System.out.println("executing request " + httppost); try (final CloseableHttpResponse response = httpclient.execute(httppost)) { System.out.println("----------------------------------------"); System.out.println(response); final HttpEntity resEntity = response.getEntity(); if (resEntity != null) { System.out.println("Response content length: " + resEntity.getContentLength()); } EntityUtils.consume(resEntity); } } } } */
    
    /* private static void test1() throws IOException, URISyntaxException, ParseException { try (CloseableHttpClient httpClient = HttpClients.createDefault()){ final HttpPost httppost = new HttpPost("https://search.jd.com/image?op=upload"); // final HttpPost httppost = new HttpPost("http://localhost:8888/test"); httppost.addHeader("cookie", "__jXLEMQAG6LTE"); httppost.addHeader("referer", "https://search.jd.com/image"); httppost.addHeader("user-agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.106 Safari/537.36"); final File file = new File("C:\\Users\\houyu\\Desktop\\1.jpg"); FileBody bin = new FileBody(file, ContentType.IMAGE_JPEG); HttpEntity reqEntity = MultipartEntityBuilder.create() // 相当于<input type="file" name="file"/> .addPart("file", bin) .build(); httppost.setEntity(reqEntity); System.out.println("Executing request " + httppost.getMethod() + " " + httppost.getUri()); try (final CloseableHttpResponse response = httpClient.execute(httppost)) { System.out.println("----------------------------------------"); System.out.println(response.getCode() + " " + response.getReasonPhrase()); System.out.println(EntityUtils.toString(response.getEntity())); } } } */