如何使用Java訪問github graphql API

Question

我需要訪問github graphql API以獲取有關某個存儲庫的一些數據。 以下curl命令正常工作

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

現在，我需要在Java調用與操作輸出相同的名稱。 這是我嘗試過的代碼，

  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();
    }

}

當我調試代碼時，它向我顯示此錯誤，

HttpResponseProxy {HTTP / 1.1 400錯誤的請求[服務器：GitHub.com，日期：2017年2月3日，星期五，格林尼治標准時間12:14:58，內容類型：application / json; charset = utf-8，內容長度：89，狀態：400錯誤的請求，X-RateLimit-Limit：200，X-RateLimit-Remaining：187，X-RateLimit-Reset：1486125149，X-OAuth-Scopes：repo，用戶，X-Accepted-OAuth-Scopes：回購，X-GitHub-Media-Type：github.v3； format = json，Access-Control-Expose-Header：ETag，鏈接，X-GitHub-OTP，X-RateLimit-Limit，X-RateLimit-Remaining，X-RateLimit-Reset，X-OAuth-Scopes，X-Accepted- OAuth范圍，X輪詢間隔，訪問控制允許來源：*，內容安全策略：default-src'none'，嚴格傳輸安全性：max-age = 31536000; includeSubdomains; 預加載，X-Content-Type-Options：nosniff，X-Frame-Options：deny，X-XSS-Protection：1； 模式=塊，X-GitHub-Request-Id：CF0A：0EE1：B057F26：EBCB8DF：58947441] ResponseEntityProxy {[Content-Type：application / json; charset = utf-8，內容長度：89，已壓縮：false]}}

我做錯了什么？ 您能幫我解決這個問題嗎？ 提前致謝

Answer 1

通過更改以下代碼使程序正常工作。 與使用JSON庫創建復雜的JSON一樣，這是一個好習慣，而不是像大多數情況下手動創建那樣，手動創建復雜的JSON可能會帶來很多麻煩。

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();
        }


    }