如何从Java访问github graphql API而不在Java内部运行curl命令 [英] how to access the github graphql API from java without running curl commands inside java
问题描述
请问我一个很长的问题，因为我是graphql的初学者.我需要访问github graphql API来获取某个文件上的责任详细信息，因为到目前为止，在此处中运行
Pardon me for the long question as I am a beginner to graphql. I need to access the github graphql API to get the blame details on a certain file, as upto now there is no blame REST API available in github API version 3. I can get output for the below graphql query which runs in here
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
}
}
}
}
}
}
}
}
通过在终端中运行以下curl命令
from running the following curl command in the terminal
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
并在Java内部运行以下相同的curl命令
and running the same curl command inside Java as below
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Demo {
public static void main(String[] args) {
String url="https://api.github.com/graphql";
String[] command = {"curl", "-H" ,"Authorization: Bearer myGitHubToken","-H","Accept:application/json","-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 } } } } } } } }\"}" , url};
ProcessBuilder process = new ProcessBuilder(command);
Process p;
try
{
p = process.start();
BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
StringBuilder builder = new StringBuilder();
String line = null;
while ( (line = reader.readLine()) != null) {
builder.append(line);
builder.append(System.getProperty("line.separator"));
}
String result = builder.toString();
System.out.print(result);
}
catch (IOException e)
{ System.out.print("error");
e.printStackTrace();
}
}
}
还有其他方法可以在不运行curl命令的情况下在java中获得相同的输出，因为在java中运行curl命令不是一个好习惯(根据我的观点).预先感谢
is there any other way that I can get the same output in java without running curl commands, as running curl commands inside java is not a good practice (according to my view). Thanks in advance
使用httpClient代码更新
这是我尝试使用apache httpClient
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");
String temp="{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 } } } } } } } }";
// String temp="{repository(owner:\"wso2\",name:\"product-is\"){description}}";
try {
StringEntity entity= new StringEntity("{\"query\":\"query "+temp+"\"}");
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();
}
}
但是即使使用{repository(owner:\"wso2\",name:\"product-is\"){description}}
{"message":解析JSON问题"，"documentation_url":" https://developer.github .com/v3 }
，但是当通过这样的简单查询String temp="{viewer {email login }}";时，它可以工作.我的代码有什么问题.请帮助
but when simple query like this is passed String temp="{viewer {email login }}"; it works. What is wrong with my code. Please help
推荐答案
这个问题与您添加了一个额外的查询"字样差不多，应该是 像这样的东西:
The issue is pretty much that you have added an extra "query" word, it should be something like this:
(...)
StringEntity entity= new StringEntity("{\"query\":\""+temp+"\"}");
尽管我应该提醒您，您应该避免尝试对json进行硬编码，因此，理想的情况是您应该使用JSON库，从而产生以下内容(完整代码):
Although I should remind you that you should avoid trying to hardcode json as much as possible, therefore, the ideal scenario you should use a JSON library, resulting in something like this (full code):
import org.json.JSONObject; // New import
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();
}
}
请注意转义的双引号是如何引起的，以便Java可以将其理解为单个字符串.
Take a note on how the escaped double quotes are just the ones so java can understand it as a single string.
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