简单http工具

工具类

import cn.hutool.core.net.DefaultTrustManager;
import com.alibaba.fastjson2.JSON;
import com.salted.fish.utils.encryption.EncryptUtil;

import javax.net.ssl.*;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
import java.security.SecureRandom;
import java.util.List;
import java.util.Map;

/**
 * @description：简单http工具
 * @author：saltedFish
 * @create：2021-03-30
 * @Version：
 */
public class EasyHttp {
    private static final Charset UTF8 = Charset.forName("UTF-8");
    private static final int OK = 200;
    private static final int FOUND = 302;
    private static SSLSocketFactory sslSocketFactory;

    static class Method {
        public static final String GET = "GET";
        public static final String POST = "POST";
    }

    static class ContentType {
        public static final String JSON = "application/json";
        public static final String FORM_URLENCODED = "application/x-www-form-urlencoded";
    }

    static {
        DefaultTrustManager trustManager = new DefaultTrustManager();
        try {
            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(new KeyManager[0], new TrustManager[]{trustManager}, new SecureRandom());
            sslSocketFactory = sslContext.getSocketFactory();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 建立连接
     *
     * @param url
     * @return
     * @throws IOException
     */
    private static HttpURLConnection openConnection(String url) throws IOException {
        HttpURLConnection httpURLConnection = (HttpURLConnection) new URL(url).openConnection();
        if (url.startsWith("https://")) {
            HttpsURLConnection httpsURLConnection = (HttpsURLConnection) httpURLConnection;
            httpsURLConnection.setHostnameVerifier((s, sslSession) -> true);
            httpsURLConnection.setSSLSocketFactory(sslSocketFactory);
        }
        //30s
        httpURLConnection.setConnectTimeout(30000);
        //30s
        httpURLConnection.setReadTimeout(30000);
        httpURLConnection.setDoInput(true);
        httpURLConnection.setDoOutput(true);
        httpURLConnection.setUseCaches(false);
        return httpURLConnection;
    }

    /**
     * 设置请求属性
     *
     * @param httpURLConnection
     * @param request
     */
    private static void setRequestProperties(HttpURLConnection httpURLConnection, HttpRequest request) {
        httpURLConnection.setRequestProperty("Accept", "*/*");
        httpURLConnection.setRequestProperty("Cache-Control", "no-cache");
        httpURLConnection.setRequestProperty("User-Agent", "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko) Chrome");
        httpURLConnection.setRequestProperty("Connection", "keep-alive");
        httpURLConnection.setRequestProperty("Host", request.getHost());
        if (request.getHeaders() != null) {
            request.getHeaders().forEach((k, v) -> {
                if (v != null)
                    httpURLConnection.setRequestProperty(k, v);
            });
        }
    }

    /**
     * 设置请求数据
     *
     * @param httpURLConnection
     * @param data
     * @throws IOException
     */
    private static void setRequestData(HttpURLConnection httpURLConnection, Object data) throws IOException {
        if (data == null)
            return;
        byte[] bytes;
        if (data instanceof byte[]) {
            bytes = (byte[]) data;
        } else if (data instanceof String) {
            bytes = data.toString().getBytes(UTF8);
        } else {
            bytes = JSON.toJSONBytes(data);
        }
        httpURLConnection.getOutputStream().write(bytes);
    }

    /**
     * 执行http方法
     *
     * @param httpURLConnection
     * @return
     * @throws IOException
     */
    private static HttpResponse execute(HttpURLConnection httpURLConnection) throws IOException {
        httpURLConnection.connect();
        int code = httpURLConnection.getResponseCode();
        String message = httpURLConnection.getResponseMessage();
        Map<String, List<String>> headers = httpURLConnection.getHeaderFields();
        InputStream in;
        if (code == OK || code == FOUND) {
            in = httpURLConnection.getInputStream();
        } else {
            in = httpURLConnection.getErrorStream();
        }
        byte[] content = null;
        if (in != null) {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            byte[] buff = new byte[1024];
            int len;
            while ((len = in.read(buff)) != -1) {
                baos.write(buff, 0, len);
            }
            content = baos.toByteArray();
        }
        return new HttpResponse(code, message, content, headers);
    }

    /**
     * 执行http方法
     *
     * @param request       请求
     * @param keepConnected 保持连接
     * @return
     * @throws IOException
     */
    public static HttpResponse execute(HttpRequest request, boolean keepConnected) throws RuntimeException {
        HttpURLConnection httpURLConnection = null;
        HttpResponse response = null;
        try {
            httpURLConnection = openConnection(request.getUrl());
            httpURLConnection.setRequestMethod(request.getMethod());
            httpURLConnection.setInstanceFollowRedirects(request.isFollowRedirects());
            setRequestProperties(httpURLConnection, request);
            setRequestData(httpURLConnection, request.getData());
            response = execute(httpURLConnection);
        } catch (IOException e) {
            // 抛出运行时异常
            throw new RuntimeException(e);
        }
        if (!keepConnected) {
            httpURLConnection.disconnect();
        }
        return response;
    }

    public static HttpResponse get(HttpRequest request) throws RuntimeException {
        request.setMethod(Method.GET);
        return execute(request, true);
    }

    public static HttpResponse get(String url) throws RuntimeException {
        return get(HttpRequest.builder().url(url).build());
    }

    public static HttpResponse post(HttpRequest request) throws RuntimeException {
        request.setMethod(Method.POST);
        return execute(request, true);
    }

    public static HttpResponse postForm(String url, Headers headers, Object formObject) throws RuntimeException {
        StringBuilder sb = new StringBuilder();
        if (formObject != null) {
            Map<?, ?> form;
            if (formObject instanceof Map) {
                form = (Map) formObject;
            } else {
                form = (Map) JSON.toJSON(formObject);
            }
            form.forEach((key, value) -> {
                if (sb.length() > 0)
                    sb.append('&');
                sb.append(key).append('=').append(value == null ? "" : value);
            });
        }
        String data = EncryptUtil.encodeURL(sb.toString());
        if (headers == null) {
            headers = Headers.create();
        }
        headers.setContentType(ContentType.FORM_URLENCODED);
        return execute(new HttpRequest(Method.POST, url, headers, data), true);
    }

    public static HttpResponse postJson(String url, Headers headers, Object jsonObject) throws RuntimeException {
        if (headers == null) {
            headers = Headers.create();
        }
        headers.setContentType(ContentType.JSON);
        return execute(new HttpRequest(Method.POST, url, headers, jsonObject), true);
    }
}

请求头对象

import java.util.HashMap;

/**
 * @description：请求头对象
 * @author：saltedFish
 * @create：2021-03-30
 * @Version：
 */
public class Headers extends HashMap<String, String> {
    
    public static Headers create() {
        return new Headers();
    }

    public Headers addHeader(String name, String value) {
        put(name, value);
        return this;
    }

    public Headers setContentType(String contentType) {
        return addHeader("Content-Type", contentType);
    }

    public Headers setAuthorization(String authorization) {
        return addHeader("Authorization", authorization);
    }
}

请求对象

import java.net.MalformedURLException;
import java.net.URL;

/**
 * @description：请求对象
 * @author：saltedFish
 * @create：2021-03-30
 * @Version：
 */
public class HttpRequest {
    private String method;
    private String url;
    private Headers headers;
    private Object data;
    private boolean followRedirects;

    public HttpRequest() {
    }

    public HttpRequest(String method, String url, Headers headers, Object data) {
        this.method = method;
        this.url = url;
        this.headers = headers;
        this.data = data;
        this.followRedirects = true;
    }

    public String getMethod() {
        return method;
    }

    public void setMethod(String method) {
        this.method = method;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public Headers getHeaders() {
        return headers;
    }

    public void setHeaders(Headers headers) {
        this.headers = headers;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }

    public boolean isFollowRedirects() {
        return followRedirects;
    }

    public void setFollowRedirects(boolean followRedirects) {
        this.followRedirects = followRedirects;
    }

    public String getHost() {
        try {
            if (url == null) return null;
            return new URL(url).getHost();
        } catch (MalformedURLException e) {
            return null;
        }
    }

    @Override
    public String toString() {
        return "HttpRequest{" +
                "method='" + method + '\'' +
                ", url='" + url + '\'' +
                ", headers=" + headers +
                ", data=" + data +
                ", followRedirects=" + followRedirects +
                '}';
    }

    public static class Builder {
        private HttpRequest request = new HttpRequest();

        public Builder method(String method) {
            request.method = method;
            return this;
        }

        public Builder url(String url) {
            request.url = url;
            return this;
        }

        public Builder header(String name, String value) {
            if (request.headers == null) {
                request.headers = new Headers();
            }
            request.headers.addHeader(name, value);
            return this;
        }

        public Builder headers(Headers headers) {
            request.headers = headers;
            return this;
        }

        public Builder data(Object data) {
            request.data = data;
            return this;
        }

        public Builder followRedirects(boolean followRedirects) {
            request.followRedirects = followRedirects;
            return this;
        }

        public HttpRequest build() {
            return request;
        }
    }

    public static Builder builder() {
        return new Builder();
    }
}

返回对象

package com.salted.fish.utils.http;

import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @description：返回对象
 * @author：saltedFish
 * @create：2021-03-30
 * @Version：
 */
public class HttpResponse {
    private static final int OK = 200;
    private int code;
    private String message;
    private byte[] body;
    private int bodyLength;
    private Map<String, List<String>> headers;
    private List<String> cookies;

    public HttpResponse(int code, String message, byte[] body, Map<String, List<String>> headers) {
        this.code = code;
        this.message = message;
        this.body = body;
        if (body != null) {
            this.bodyLength = body.length;
        }
        parseHeaders(headers);
    }

    private void parseHeaders(Map<String, List<String>> headers) {
        this.headers = new HashMap<>(headers);
        List<String> protocol = this.headers.remove(null);
        if (protocol != null) {
            this.headers.put("Http-Protocol", protocol);
        }
        this.cookies = headers.get("Set-Cookie");
    }

    public int getCode() {
        return code;
    }

    public String getMessage() {
        return message;
    }

    public int getBodyLength() {
        return bodyLength;
    }

    public byte[] getBody() {
        return body;
    }

    public String getBodyAsString() {
        if (body == null) {
            return null;
        }
        return new String(body, StandardCharsets.UTF_8);
    }

    public Map<String, List<String>> getHeaders() {
        return new HashMap<>(headers);
    }

    public List<String> getCookies() {
        if (cookies == null) {
            return null;
        }
        return new ArrayList<>(cookies);
    }

    public boolean isOK() {
        return code == OK;
    }
}