package com.zy.common.utils;
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import okhttp3.*;
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import java.io.IOException;
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import java.util.Map;
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import java.util.Optional;
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import java.util.concurrent.TimeUnit;
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/**
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* Http协议客户端
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* @author luxiaotao
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* @date 2018-9-27
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*/
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public class HttpHandler {
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private static final Integer DEFAULT_TIMEOUT_SECONDS = 5;
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private static final MediaType MEDIA_TYPE = MediaType.parse("application/json");
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private String uri;
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private String path;
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private String json;
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private Map<String, Object> params;
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private Map<String, Object> headers;
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private boolean https;
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private Integer timeout;
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private TimeUnit timeUnit;
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public HttpHandler(Builder builder) {
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this.uri = builder.uri;
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this.path = builder.path;
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this.json = builder.json;
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this.params = builder.params;
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this.headers = builder.headers;
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this.https = builder.https;
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this.timeout = builder.timeout;
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this.timeUnit = builder.timeUnit;
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}
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/**
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* GET请求执行
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* @return the HttpHandler response
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*/
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public String doGet() throws IOException {
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String url = paramsToUrl(uri, path, params, https);
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Request.Builder headerBuilder = new Request.Builder();
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if (headers != null && headers.size() > 0) {
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for (Map.Entry<String, Object> entry : headers.entrySet()) {
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headerBuilder.addHeader(entry.getKey(), String.valueOf(entry.getValue()));
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}
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}
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Request request = headerBuilder.url(url).build();
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Response response = getClient(timeout, timeUnit).newCall(request).execute();
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return response.isSuccessful() ? response.body().string() : null;
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}
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/**
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* POST请求执行
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* @return the HttpHandler response
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*/
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public String doPost() throws IOException {
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Request request;
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Request.Builder headerBuilder = new Request.Builder();
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if (headers != null && headers.size() > 0) {
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for (Map.Entry<String, Object> entry : headers.entrySet()) {
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headerBuilder.addHeader(entry.getKey(), String.valueOf(entry.getValue()));
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}
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}
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if (json == null || "".equals(json)) {
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FormBody.Builder builder = new FormBody.Builder();
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for (Map.Entry<String, Object> entry : params.entrySet()) {
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builder.add(entry.getKey(), String.valueOf(entry.getValue()));
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}
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FormBody body = builder.build();
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request = headerBuilder
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.url((https ? "https://" : "http://") + uri + path)
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.post(body)
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.build();
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} else {
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RequestBody body = RequestBody.create(MEDIA_TYPE, json);
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Request.Builder builder = headerBuilder.url((https ? "https://" : "http://") + uri + path);
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builder.header("Content-Type", "application/json");
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request = builder.post(body).build();
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}
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Call call = getClient(timeout, timeUnit).newCall(request);
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Response response = call.execute();
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return response.body().string();
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}
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/**
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* get请求参数拼接方法
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* @return 请求行
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*/
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private String paramsToUrl(String uri, String path, Map<String, Object> params, boolean isHttps) {
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StringBuilder res = new StringBuilder();
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res.append(isHttps ? "https://" : "http://");
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res.append(uri);
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if (path.length() > 0 && !(path.charAt(0) == '/')) {
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res.append("/");
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}
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res.append(path);
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Optional.ofNullable(params).ifPresent(
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args -> {
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res.append("?");
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args.forEach((key, value) -> {
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res.append(key);
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res.append("=");
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res.append(value);
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res.append("&");
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});
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}
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);
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String url = res.toString();
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if ("&".equals(url.substring(url.length() - 1, url.length()))) {
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url = url.substring(0, url.length() - 1);
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}
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return url;
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}
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/**
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* 获取 okHttpClient
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* @return the HttpHandler instance
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*/
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private OkHttpClient getClient(Integer timeout, TimeUnit timeUnit) {
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return new OkHttpClient
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.Builder()
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.connectTimeout(timeout, timeUnit)
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.readTimeout(timeout, timeUnit)
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.build();
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}
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/**
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* Http协议报文建造者
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*/
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public static class Builder {
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private String uri;
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private String path;
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private String json;
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private Map<String, Object> params;
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private Map<String, Object> headers;
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private boolean https;
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private Integer timeout;
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private TimeUnit timeUnit;
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{
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// 默认5s超时
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timeout = DEFAULT_TIMEOUT_SECONDS;
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timeUnit = TimeUnit.SECONDS;
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path = "";
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}
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/**
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* 建造器
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* @return the HttpHandler instance
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*/
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public HttpHandler build() {
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if (null == this.uri || "".equals(this.uri)) {
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throw new RuntimeException("uri is null");
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}
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if (this.uri.startsWith("http://")) {
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this.uri = this.uri.substring(6, uri.length());
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} else if (this.uri.startsWith("https://")) {
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this.uri = this.uri.substring(7, uri.length());
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}
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return new HttpHandler(this);
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}
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public Builder setUri(String uri) {
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this.uri = uri;
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return this;
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}
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public Builder setPath(String path) {
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if (!path.startsWith("/")) {
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path = "/" + path;
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}
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this.path = path;
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return this;
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}
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public Builder setTimeout(Integer timeout, TimeUnit timeUnit) {
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this.timeout = timeout;
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this.timeUnit = timeUnit;
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return this;
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}
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public Builder setParams(Map<String, Object> params) {
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this.params = params;
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return this;
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}
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public Builder setHeaders(Map<String, Object> headers) {
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this.headers = headers;
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return this;
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}
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public Builder setHttps(boolean https) {
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this.https = https;
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return this;
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}
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public Builder setJson(String json) {
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this.json = json;
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return this;
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}
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}
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}
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