java后端服务调用googleapi直接获取accesstoekn

java后端服务调⽤googleapi直接获取accesstoekn

开发google api 的时候遇到的问题需要维护google上的搜索商品 google 需要获取access token 才能正常调⽤

相关⽂档

⽹上看了很多相关⽂章没有直接获取access token的⼤部分都是需要 url 重定向取URL⾥⾯的code 然后⽤code取access token 服务端这样处理⽐较难应该是直接调⼀个接⼝返回 access token 这样处理⽐较⽅便

前⾯的步骤简单说⼀下

1.创建服务项⽬

2.⽣成加密⽂件 (json或者p12)

这两个步骤⽹上都有教程

双环戊二烯获取access token

⽅式⼀直接⽤google原⽣的api

public static void main(String[] args) throws IOException {

HttpTransport httpTransport = wTrustedTransport();

JsonFactory jsonFactory = DefaultInstance();

GoogleCredentials credential = GoogleCredentials.fromStream(ResourceAsStream("加密的json⽂件路径"))

.createScoped(Arrays.asList("leapis/auth/userinfo.profile",

"leapis/auth/content"));//设置作⽤域

String accessToken = AccessToken().getTokenValue();

System.out.println(accessToken);

ComputeCredential computeCredential = new ComputeCredential(httpTransport,jsonFactory);

computeCredential.setAccessToken(accessToken);

ShoppingContent service = new ShoppingContent

.Builder(httpTransport, jsonFactory, computeCredential)

.build();

ShoppingContent.Products.List productList = service.products().list(BigInteger.valueOf(110141822));

ProductsListResponse page = ute();

List<Product> resources = Resources();

System.out.String());

//插⼊和更新

// service.products().insert(BigInteger.valueOf(110141822),new Product());

/ //批量插⼊和更新

// ProductsCustomBatchRequest productsCustomBatchRequest = new ProductsCustomBatchRequest();

// List<ProductsCustomBatchRequestEntry> updates = new ArrayList();

// ProductsCustomBatchRequestEntry info = new ProductsCustomBatchRequestEntry();

// info.setProduct(new Product());

// productsCustomBatchRequest.setEntries(updates);

// service.products().custombatch(productsCustomBatchRequest);

}

⽅式⼆⽣成jwt字符串再掉接⼝取access token

a.使⽤ jjwt ⽅式⽣成JWT

private static String getJwt() throws InvalidKeyException {

String private_key = getPrivateKey(); //json⽂件中的private_key 记得删除头和尾的不必要字符串 long now = System.currentTimeMillis() / 1000;

Map<String, Object> heads = new HashMap();

heads.put("typ", "JWT");

heads.put("alg", "RS256");

System.out.JSONString(heads));

Claims claims = Jwts.claims();

claims.put("iss", "content-api@iconic-vine-270102.iam.gserviceaccount");

claims.put("scope", "leapis/auth/content");

claims.put("aud", "leapis/token");

claims.put("exp", now + 3600 + "");

claims.put("iat", now + "");

System.out.JSONString(claims));

SignatureAlgorithm signatureAlgorithm = SignatureAlgorithm.RS256;

byte[] apikeys = DatatypeConverter.parseBase64Binary(private_key);

Key key = wKey(apikeys);

大庆油田宽带String str = Jwts.builder()

.setHeader(heads)

.setClaims(claims)

.setExpiration(new Date(System.currentTimeMillis() + 3600 * 1000)) //token保留的时间 .signWith(signatureAlgorithm, key) //

pact();

System.out.println(str);

越南全民皆兵return str;

}

public static String getPrivateKey(){

String jsonStr = "";

try {

File jsonFile = new File("加密json问价路径");

FileReader fileReader = new FileReader(jsonFile);

Reader reader = new InputStreamReader(new FileInputStream(jsonFile),"utf-8");

int ch = 0;

StringBuffer sb = new StringBuffer();

while ((ch = ad()) != -1) {

sb.append((char) ch);

}

fileReader.close();

reader.close();

jsonStr = sb.toString();

return JSON.parseObject(jsonStr).get("private_key").toString().replace("-----BEGIN PRIVATE KEY-----\n", "").replace("\n-----END PRIVATE KEY-----\n", "");

} catch (IOException e) {

e.printStackTrace();

return null;

名师帮你赢高考}

}

b.⾕歌原⽣api⽣成jwt

private static String getJwt() throws GeneralSecurityException, IOException {

HttpTransport httpTransport = wTrustedTransport();

JsonFactory jsonFactory = DefaultInstance();

GoogleCredential credential = GoogleCredential.fromStream(ResourceAsStream("加密json⽂件路径")); ateScoped(Collections.singleton(ShoppingContentScopes.CONTENT));

PrivateKey privateKey = ServiceAccountPrivateKey();

long now = System.currentTimeMillis() / 1000;

JsonWebSignature.Header header = new JsonWebSignature.Header();

header.put("typ", "JWT");

header.put("alg", "RS256");

System.out.JSONString(header));

JsonWebToken.Payload payload = new JsonWebSignature.Payload();

payload.put("iss", "content-api@iconic-vine-270102.iam.gserviceaccount");

payload.put("scope", "leapis/auth/content");

payload.put("aud", "leapis/token");

payload.put("exp", now + 3600);

payload.put("iat", now);

System.out.JSONString(payload));

String s = JsonWebSignature.signUsingRsaSha256(privateKey, jsonFactory, header, payload);

System.out.println(s);

return s;

}

97gab

google 根据jwt ⽣成 access token 的接⼝

post请求 form表单形式提交参数

grant_type urn:ietf:params:oauth:grant-type:jwt-bearer (固定写法) assertion jwt字符串

pom相关

<groupId&le.apis</groupId>

<artifactId>google-api-services-oauth2</artifactId>

</dependency>

<groupId&le.apis</groupId>

<artifactId>google-api-services-content</artifactId>

</dependency>

</dependency>

<groupId>io.jsonwebtoken</groupId>

</dependency>

<groupId&le.http-client</groupId>

<artifactId>google-http-client-jackson2</artifactId>

</dependency>

<groupId&le.oauth-client</groupId>

<artifactId>google-oauth-client-jetty</artifactId>

</dependency>

<groupId&le.oauth-client</groupId>

<artifactId>google-oauth-client-servlet</artifactId>

</dependency>

<groupId>javax.servlet</groupId>

<artifactId>servlet-api</artifactId>

<version>3.0-alpha-1</version>

</dependency>

食品价格连续上涨

<groupId&le.api-client</groupId>

<artifactId>google-api-client</artifactId>

</dependency>

<groupId>com.alibaba</groupId>

<artifactId>fastjson</artifactId>

</dependency>

<groupId&le.auth</groupId>

<artifactId>google-auth-library-oauth2-http</artifactId> <version>0.20.0</version>

</dependency>

</dependencies>

千万注意账户对应权限如果对应不上会导致很奇怪的问题

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