如何使用java访问github graphql API
我需要访问github graphql API来获取有关某个存储库的一些数据。 以下curl命令工作正常
curl -i -H "Authorization: bearer myGithubToken" -X POST -d '{"query": "query { repository(owner: \"wso2-extensions\", name: \"identity-inbound-auth-oauth\") { object(expression:\"83253ce50f189db30c54f13afa5d99021e2d7ece\") { ... on Commit { blame(path: \"components/org.wso2.carbon.identity.oauth.endpoint/src/main/java/org/wso2/carbon/identity/oauth/endpoint/authz/OAuth2AuthzEndpoint.java\") { ranges { startingLine endingLine age commit { message url history(first: 2) { edges { node { message url } } } author { name email } } } } } } } }"}' https://api.github.com/graphql
现在我需要在Java调用相同的操作输出。 这是我试过的代码，
public void callGraphqlApi(){ CloseableHttpClient httpClientForGraphql = null; CloseableHttpResponse httpResponseFromGraphql= null; httpClientForGraphql=HttpClients.createDefault(); HttpPost httpPost= new HttpPost("https://api.github.com/graphql"); String query= "query\":\"query { repository(owner: \"wso2-extensions\", name:\"identity-inbound-auth-oauth\") { object(expression: \"83253ce50f189db30c54f13afa5d99021e2d7ece\") { ... on Commit { blame(path: \"components/org.wso2.carbon.identity.oauth.endpoint/src/main/java/org/wso2/carbon/identity/oauth/endpoint/authz/OAuth2AuthzEndpoint.java\") { ranges { startingLine endingLine age commit { message url history(first: 2) { edges { node { message url } } } author { name email } } } } } } } }"; httpPost.addHeader("Authorization","Bearer myGithubToken"); try { StringEntity params= new StringEntity(query); httpPost.addHeader("content-type","application/x-www-form-urlencoded"); httpPost.setEntity(params); httpResponseFromGraphql= httpClientForGraphql.execute(httpPost); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } }
当我调试代码时，它向我显示了这个错误，
HttpResponseProxy {HTTP / 1.1 400 Bad Request [服务器：GitHub.com，日期：星期五，2017年2月3日12:14:58 GMT，Content-Type：application / json; charset = utf-8，Content-Length：89，Status：400 Bad Request，X-RateLimit-Limit：200，X-RateLimit-Remaining：187，X-RateLimit-Reset：1486125149，X-OAuth-Scopes：repo， user，X-Accepted-OAuth-Scopes：repo，X-GitHub-Media-Type：github.v3; format = json，Access-Control-Expose-Headers：ETag，Link，X-GitHub-OTP，X-RateLimit-Limit，X-RateLimit-Remaining，X-RateLimit-Reset，X-OAuth-Scopes，X-Accepted- OAuth-Scopes，X-Poll-Interval，Access-Control-Allow-Origin：*，Content-Security-Policy：default-src’none’，Strict-Transport-Security：max-age = 31536000; includeSubdomains; preload，X-Content-Type-Options：nosniff，X-Frame-Options：deny，X-XSS-Protection：1; mode = block，X-GitHub-Request-Id：CF0A：0EE1：B057F26：EBCB8DF：58947441] ResponseEntityProxy {[Content-Type：application / json; charset = utf-8，Content-Length：89，Chunked：false]}}
我做错了什么？ 能帮助我解决这个问题吗？ 提前致谢
通过更改上面的代码使程序工作如下。 最好使用JSON库来创建类似于上面的复杂JSON ，而不是手动创建它，因为大多数情况下，手动创建复杂的JSON可能会导致很多麻烦。
import org.json.JSONObject; public void callingGraph(){ CloseableHttpClient client= null; CloseableHttpResponse response= null; client= HttpClients.createDefault(); HttpPost httpPost= new HttpPost("https://api.github.com/graphql"); httpPost.addHeader("Authorization","Bearer myToken"); httpPost.addHeader("Accept","application/json"); JSONObject jsonObj = new JSONObject(); jsonobj.put("query", "{repository(owner: \"wso2-extensions\", name: \"identity-inbound-auth-oauth\") { object(expression: \"83253ce50f189db30c54f13afa5d99021e2d7ece\") { ... on Commit { blame(path: \"components/org.wso2.carbon.identity.oauth.endpoint/src/main/java/org/wso2/carbon/identity/oauth/endpoint/authz/OAuth2AuthzEndpoint.java\") { ranges { startingLine, endingLine, age, commit { message url history(first: 2) { edges { node { message, url } } } author { name, email } } } } } } } }"); try { StringEntity entity= new StringEntity(jsonObj.toString()); httpPost.setEntity(entity); response= client.execute(httpPost); } catch(UnsupportedEncodingException e){ e.printStackTrace(); } catch(ClientProtocolException e){ e.printStackTrace(); } catch(IOException e){ e.printStackTrace(); } try{ BufferedReader reader= new BufferedReader(new InputStreamReader(response.getEntity().getContent())); String line= null; StringBuilder builder= new StringBuilder(); while((line=reader.readLine())!= null){ builder.append(line); } System.out.println(builder.toString()); } catch(Exception e){ e.printStackTrace(); } }