我有一个名为 Autentica 的简单 servlet，它负责获取用于了解 OAuth 令牌的解码参数。API 返回到我的回调页面，从而运行名为回调的 servlet。问题就在这里：当我构建获取 OAuth 令牌的 URL 时，会生成一个我不知道如何解决的 IOException。
任何人都可以帮助我吗？遵循 servlet 代码和控制台结果。非常感谢！
1) Servlet Autentica
@WebServlet(name = "autentica", urlPatterns = {"/autentica"})
public class Autentica extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
processRequest(req, resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
processRequest(req, resp);
}
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
//API Credentials
String client_id = "XXXXXXXXXXX";
String client_secret = "YYYYYYYYYYYY";
String redirect_uri = "http://localhost:8080/InstagramAPI/callback";
//Set Session Variables
HttpSession session = request.getSession(true);
session.setAttribute("client_id", client_id);
session.setAttribute("client_secret", client_secret);
session.setAttribute("redirect_uri", redirect_uri);
try {
//Redirect User to foursquare login page
String url = "https://api.instagram.com/oauth/authorize/?client_id="
+ client_id + "&redirect_uri=" + redirect_uri
+ "&response_type=code";
response.sendRedirect(url);
} finally {
out.close();
}
}
}
2) Servlet 回调
@WebServlet(name = "callback", urlPatterns = {"/callback"})
public class Callback extends HttpServlet{
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
processRequest(req, resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
processRequest(req, resp);
}
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
HttpSession session = request.getSession(true);
String clientID =(String)session.getAttribute("client_id");
String clientSecret =(String)session.getAttribute("client_secret");
String redirectURI =(String)session.getAttribute("redirect_uri");
String code = request.getParameter("code");
String url = "https://api.instagram.com/oauth/access_token?"
+ "client_id=" + clientID
+ "&client_secret=" + clientSecret
+ "&grant_type=authorization_code"
+ "&redirect_uri=" + redirectURI
+ "&code="+code;
getContent(url);
}
//Return response after GET Request
public String getContent(String httpurl){
try {
URL url = new URL(httpurl);
URLConnection httpc = url.openConnection();
httpc.setDoInput(true);
httpc.connect();
BufferedReader in = new BufferedReader(new InputStreamReader(
httpc.getInputStream()));
String strLine = "";
String content = "";
while ((strLine = in.readLine()) != null){
content = content+strLine;
}
in.close();
return content;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
3) 控制台
SEVERE: java.io.IOException: Server returned HTTP response code: 405 for URL: https://api.instagram.com/oauth/access_token?client_id=XXXXXXXXXXX&client_secret=YYYYYYYYYYYY&grant_type=authorization_code&redirect_uri=http://localhost:8080/InstagramAPI/callback&code=aca1134c71944461b9db9417f4e2baa5
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1615)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
at Callback.getContent(Callback.java:62)
at Callback.processRequest(Callback.java:52)
at Callback.doGet(Callback.java:29)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:722)
SEVERE: at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1615)
SEVERE: at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
SEVERE: at Callback.getContent(Callback.java:62)
SEVERE: at Callback.processRequest(Callback.java:52)
SEVERE: at Callback.doGet(Callback.java:29)
SEVERE: at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
SEVERE: at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
SEVERE: at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542)
SEVERE: at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
SEVERE: at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
SEVERE: at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
SEVERE: at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
SEVERE: at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
SEVERE: at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
SEVERE: at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
SEVERE: at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
SEVERE: at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
SEVERE: at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849)
SEVERE: at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746)
SEVERE: at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045)
SEVERE: at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)
SEVERE: at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
SEVERE: at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
SEVERE: at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
SEVERE: at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
SEVERE: at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
SEVERE: at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
SEVERE: at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
SEVERE: at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
SEVERE: at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
SEVERE: at java.lang.Thread.run(Thread.java:722)