oauth2做簡單的gitee登陸

圖來自網絡 

授權登陸的官方api以及其他的api接口文檔

說明：由于使用qq，微網誌的第三方登陸需要認證，而時間又比較長，這裡就使用gitee免認證的方式來簡單的實作一下第三方登陸.

開始：

首先找到設定中的第三方應用

 然後建立應用：

  要設定一些資訊，比如回調位址:注意回調位址是外網可以通路的位址，使用一些阿裡雲的學生伺服器就可以了，比較便宜。

資訊設定完後，可以得到一個ClientId，ClientSecret,兩個都是很重要的東西

然後開始簡單的使用了:

首先我們在網頁上的是點選某一個三方登陸，就會跳出來一個登良頁面進行登陸，然後登陸成功就會跳到登陸成功的頁面，這個成功的頁面是我們自己來指定的。

@RequestMapping("login")
    public String login(){


        String url="https://gitee.com/oauth/authorize?client_id=%s" +
                "&redirect_uri=%s&response_type=code";

        url= String.format(url, clientId, callback);

        return "redirect:"+url;
    }


首先這個位址是gitee的第三方登陸認證位址，我們需要攜帶參數ClientId,還有回調位址。
然後重定向到這個頁面上，

當然這裡我是使用的在後端來跳轉的，當然，你也可以在前端去進行跳轉，看各位自己。


           

在位址欄輸入:ip:端口/login

會跳轉到gitee的登陸頁面(如果gitee沒有登陸的話)，登陸了的話會顯示授權，第一次授權，那麼之後的，将直接登陸成功。

此時如果點選登陸的話會傳回一個404的一個錯誤，那麼因為上面需要用到的回調我們還沒寫

但是，注意，此時位址欄上的位址雖然是我們的回調位址，但後面攜帶了一個code一個參數，這是一個授權碼，我們需要得到它。

在寫回調之前，我們先引入坐标

<dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.6</version>
        </dependency>
        <!-- alibaba的fastjson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.51</version>
        </dependency>

        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.6</version>
        </dependency>
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency>
   
       <!--我們用這個來處理請求傳回的結果-->     
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.5</version> 
        </dependency>
           

回調:

@RequestMapping("/callback")
    @ResponseBody
    public String callback(String code) throws Exception {
   
        //由于确定登陸會回調該方法且攜帶一個code在位址欄，我們可以通過參數的方式擷取
        //或者使用HttpServletRequest注入的方式去擷取

        log.info("進入回調");
        log.info("擷取code{}",code);


        //擷取令牌參數
        String body="grant_type=authorization_code&code="+code+
                "&client_id="+clientId+
                "&redirect_uri="+callback+
                "&client_secret="+secret;

        log.info("發送擷取令牌請求");
        String s="";
        try {
             s = HttpClientUtils.post("https://gitee.com/oauth/token",body,"application/x-www-form-urlencoded","utf-8",30000,30000);
        } catch (Exception e) {
            log.error("擷取令牌失敗{}",e.getMessage());
        }
        log.info("擷取令牌請求的傳回值{}",s);


//這裡需要注意一下，發送的是post請求，第三個參數mimeType,我使用的是application/x-www-form-urlencoded，資料按照 key1=val1&key2=val2 的方式進行編碼，key 和 val 都進行了 URL 轉碼，資料放在body裡




        //使用gson的方式去解析傳回的内容
        Gson gson = new Gson();
        HashMap hashMap = gson.fromJson(s, HashMap.class);
        String access_token = (String)hashMap.get("access_token");
        log.info("令牌:{}",access_token);
        System.out.println(s);



        //擷取使用者資訊需要攜帶token就可以了，其他第三方登陸可能需要攜帶使用者id,主要看文檔
        log.info("擷取使用者資訊");
        String s2 = HttpClientUtils.get("https://gitee.com/api/v5/user?access_token=" + access_token);
        log.info("使用者資訊{}",s2);
        return s2;

    }
           

令牌的過期時間為1天，具體要怎麼設計這個使用者的過期時間由開發任務自己選擇，

當然令牌過期了，還可以使用

https://gitee.com/oauth/token?grant_type=refresh_token&refresh_token={refresh_token}

這種方式重新擷取令牌。

下面那一段則是擷取使用者資訊，具體怎麼使用看個人。

總結：上面的這種方式的登陸是使用授權碼的方式登陸，還有一種是密碼的方式登陸

上面使用到的發送請求的工具(當然這個網絡上有很多)

package com.oauth.util;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.config.RequestConfig.Builder;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContextBuilder;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.conn.ssl.X509HostnameVerifier;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;

import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;
import java.io.IOException;
import java.net.SocketTimeoutException;
import java.security.GeneralSecurityException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

/**
 *  依賴的jar包有：commons-lang-2.6.jar、httpclient-4.3.2.jar、httpcore-4.3.1.jar、commons-io-2.4.jar
 * @author zhaoyb
 *
 */
public class HttpClientUtils {

	public static final int connTimeout=10000;
	public static final int readTimeout=10000;
	public static final String charset="UTF-8";
	private static HttpClient client = null;

	static {
		PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
		cm.setMaxTotal(128);
		cm.setDefaultMaxPerRoute(128);
		client = HttpClients.custom().setConnectionManager(cm).build();
	}

	public static String postParameters(String url, String parameterStr) throws ConnectTimeoutException, SocketTimeoutException, Exception{
		return post(url,parameterStr,"application/x-www-form-urlencoded",charset,connTimeout,readTimeout);
	}

	public static String postParameters(String url, String parameterStr,String charset, Integer connTimeout, Integer readTimeout) throws ConnectTimeoutException, SocketTimeoutException, Exception{
		return post(url,parameterStr,"application/x-www-form-urlencoded",charset,connTimeout,readTimeout);
	}

	public static String postParameters(String url, Map<String, String> params) throws ConnectTimeoutException,
			SocketTimeoutException, Exception {
		return postForm(url, params, null, connTimeout, readTimeout);
	}

	public static String postParameters(String url, Map<String, String> params, Integer connTimeout,Integer readTimeout) throws ConnectTimeoutException,
			SocketTimeoutException, Exception {
		return postForm(url, params, null, connTimeout, readTimeout);
	}

	public static String get(String url) throws Exception {
		return get(url, charset, null, null);
	}

	public static String get(String url, String charset) throws Exception {
		return get(url, charset, connTimeout, readTimeout);
	}

	/**
	 * 發送一個 Post 請求, 使用指定的字元集編碼.
	 *
	 * @param url
	 * @param body RequestBody
	 * @param mimeType 例如 application/xml "application/x-www-form-urlencoded" a=1&b=2&c=3
	 * @param charset 編碼
	 * @param connTimeout 建立連結逾時時間,毫秒.
	 * @param readTimeout 響應逾時時間,毫秒.
	 * @return ResponseBody, 使用指定的字元集編碼.
	 * @throws ConnectTimeoutException 建立連結逾時異常
	 * @throws SocketTimeoutException  響應逾時
	 * @throws Exception
	 */
	public static String post(String url, String body, String mimeType,String charset, Integer connTimeout, Integer readTimeout)
			throws ConnectTimeoutException, SocketTimeoutException, Exception {
		HttpClient client = null;
		HttpPost post = new HttpPost(url);
		String result = "";
		try {
			if (StringUtils.isNotBlank(body)) {
				HttpEntity entity = new StringEntity(body, ContentType.create(mimeType, charset));
				post.setEntity(entity);
			}
			// 設定參數
			Builder customReqConf = RequestConfig.custom();
			if (connTimeout != null) {
				customReqConf.setConnectTimeout(connTimeout);
			}
			if (readTimeout != null) {
				customReqConf.setSocketTimeout(readTimeout);
			}
			post.setConfig(customReqConf.build());

			HttpResponse res;
			if (url.startsWith("https")) {
				// 執行 Https 請求.
				client = createSSLInsecureClient();
				res = client.execute(post);
			} else {
				// 執行 Http 請求.
				client = HttpClientUtils.client;
				res = client.execute(post);
			}
			result = IOUtils.toString(res.getEntity().getContent(), charset);
		} finally {
			post.releaseConnection();
			if (url.startsWith("https") && client != null&& client instanceof CloseableHttpClient) {
				((CloseableHttpClient) client).close();
			}
		}
		return result;
	}


	/**
	 * 送出form表單
	 *
	 * @param url
	 * @param params
	 * @param connTimeout
	 * @param readTimeout
	 * @return
	 * @throws ConnectTimeoutException
	 * @throws SocketTimeoutException
	 * @throws Exception
	 */
	public static String postForm(String url, Map<String, String> params, Map<String, String> headers, Integer connTimeout,Integer readTimeout) throws ConnectTimeoutException,
			SocketTimeoutException, Exception {

		HttpClient client = null;
		HttpPost post = new HttpPost(url);
		try {
			if (params != null && !params.isEmpty()) {
				List<NameValuePair> formParams = new ArrayList<NameValuePair>();
				Set<Entry<String, String>> entrySet = params.entrySet();
				for (Entry<String, String> entry : entrySet) {
					formParams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
				}
				UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formParams, Consts.UTF_8);
				post.setEntity(entity);
			}

			if (headers != null && !headers.isEmpty()) {
				for (Entry<String, String> entry : headers.entrySet()) {
					post.addHeader(entry.getKey(), entry.getValue());
				}
			}
			// 設定參數
			Builder customReqConf = RequestConfig.custom();
			if (connTimeout != null) {
				customReqConf.setConnectTimeout(connTimeout);
			}
			if (readTimeout != null) {
				customReqConf.setSocketTimeout(readTimeout);
			}
			post.setConfig(customReqConf.build());
			HttpResponse res = null;
			if (url.startsWith("https")) {
				// 執行 Https 請求.
				client = createSSLInsecureClient();
				res = client.execute(post);
			} else {
				// 執行 Http 請求.
				client = HttpClientUtils.client;
				res = client.execute(post);
			}
			return IOUtils.toString(res.getEntity().getContent(), "UTF-8");
		} finally {
			post.releaseConnection();
			if (url.startsWith("https") && client != null
					&& client instanceof CloseableHttpClient) {
				((CloseableHttpClient) client).close();
			}
		}
	}




	/**
	 * 發送一個 GET 請求
	 *
	 * @param url
	 * @param charset
	 * @param connTimeout  建立連結逾時時間,毫秒.
	 * @param readTimeout  響應逾時時間,毫秒.
	 * @return
	 * @throws ConnectTimeoutException   建立連結逾時
	 * @throws SocketTimeoutException   響應逾時
	 * @throws Exception
	 */
	public static String get(String url, String charset, Integer connTimeout,Integer readTimeout)
			throws ConnectTimeoutException,SocketTimeoutException, Exception {

		HttpClient client = null;
		HttpGet get = new HttpGet(url);
		String result = "";
		try {
			// 設定參數
			Builder customReqConf = RequestConfig.custom();
			if (connTimeout != null) {
				customReqConf.setConnectTimeout(connTimeout);
			}
			if (readTimeout != null) {
				customReqConf.setSocketTimeout(readTimeout);
			}
			get.setConfig(customReqConf.build());

			HttpResponse res = null;

			if (url.startsWith("https")) {
				// 執行 Https 請求.
				client = createSSLInsecureClient();
				res = client.execute(get);
			} else {
				// 執行 Http 請求.
				client = HttpClientUtils.client;
				res = client.execute(get);
			}

			result = IOUtils.toString(res.getEntity().getContent(), charset);
		} finally {
			get.releaseConnection();
			if (url.startsWith("https") && client != null && client instanceof CloseableHttpClient) {
				((CloseableHttpClient) client).close();
			}
		}
		return result;
	}


	/**
	 * 從 response 裡擷取 charset
	 *
	 * @param ressponse
	 * @return
	 */
	@SuppressWarnings("unused")
	private static String getCharsetFromResponse(HttpResponse ressponse) {
		// Content-Type:text/html; charset=GBK
		if (ressponse.getEntity() != null  && ressponse.getEntity().getContentType() != null && ressponse.getEntity().getContentType().getValue() != null) {
			String contentType = ressponse.getEntity().getContentType().getValue();
			if (contentType.contains("charset=")) {
				return contentType.substring(contentType.indexOf("charset=") + 8);
			}
		}
		return null;
	}



	/**
	 * 建立 SSL連接配接
	 * @return
	 * @throws GeneralSecurityException
	 */
	private static CloseableHttpClient createSSLInsecureClient() throws GeneralSecurityException {
		try {
			SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {
				public boolean isTrusted(X509Certificate[] chain,String authType) throws CertificateException {
					return true;
				}
			}).build();

			SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, new X509HostnameVerifier() {

				@Override
				public boolean verify(String arg0, SSLSession arg1) {
					return true;
				}

				@Override
				public void verify(String host, SSLSocket ssl)
						throws IOException {
				}

				@Override
				public void verify(String host, X509Certificate cert)
						throws SSLException {
				}

				@Override
				public void verify(String host, String[] cns,
								   String[] subjectAlts) throws SSLException {
				}

			});

			return HttpClients.custom().setSSLSocketFactory(sslsf).build();

		} catch (GeneralSecurityException e) {
			throw e;
		}
	}

	public static void main(String[] args) {
		try {
			String str= post("https://localhost:443/ssl/test.shtml","name=12&page=34","application/x-www-form-urlencoded", "UTF-8", 10000, 10000);
			//String str= get("https://localhost:443/ssl/test.shtml?name=12&page=34","GBK");
            /*Map<String,String> map = new HashMap<String,String>();
            map.put("name", "111");
            map.put("page", "222");
            String str= postForm("https://localhost:443/ssl/test.shtml",map,null, 10000, 10000);*/
			System.out.println(str);
		} catch (ConnectTimeoutException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SocketTimeoutException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}