HTTP邮政利用Matlab(HTTP Post with Matlab)

我跟着在这篇文章中给出的示例：如何从MATLAB数据发送到Rails的，但我接收我找不到任何信息的错误消息。我的脚本是这样的：

javaaddpath('./httpcomponents/httpclient-4.2.2.jar')
javaaddpath('./httpcomponents/httpcore-4.2.2.jar')

import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;

httpclient = DefaultHttpClient();

httppost = HttpPost('http://localhost:3000/signin');
httppost.addHeader('Content-Type','application/json');
httppost.addHeader('Accept','application/json');

tokenRequest = StringEntity('{"session", "{email_address:""email@aol.com,""password:""password""}"}');
httppost.setEntity(tokenRequest);

response = httpclient.execute(httppost);

在最后一行，我得到的错误：

Java的异常：java.lang.VerifyError的：不能从最后一类继承

从在线搜索，据我了解，这是软件版本问题。我尝试使用4.2建立这些文件（在其他职位所使用的相同的），但我收到了同样的错误。没有人有一个想法可能是错了吗？或者知道怎样做我想做而不使用这些外部库做什么？

编辑：

本来我尝试使用此代码：

tokenRequest = {'session', '{''email_address'':''email@aol.com'',''password'':''password''}'};
token = urlread('http://localhost:3000/signin','POST',tokenRequest);

但我收到，导致我的其他职位的NoMethodError：

NoMethodError (undefined method `each' for "{'email_address':'email@aol.com','password':'password'}":String):
     app/models/session.rb:14:in `initialize'

我认为它抛出这个错误的原因是因为服务器认为它正在接收String对象，它不具有每种方法。我想我会用“的Content-Type”参数来指定其JSON解决这个问题。有没有办法做到这一点使用urlread？

编辑：对Java库问题全堆栈跟踪

Java exception occurred:
java.lang.VerifyError: Cannot inherit from final class

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(Unknown Source)

at java.security.SecureClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.access$000(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at com.mathworks.jmi.CustomURLClassLoader.findClass(ClassLoaderManager.java:760)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClassInternal(Unknown Source)

at org.apache.http.impl.client.DefaultHttpClient.createHttpParams(DefaultHttpClient.java:157)

at  org.apache.http.impl.client.AbstractHttpClient.getParams(AbstractHttpClient.java:448)

at org.apache.http.impl.client.AbstractHttpClient.createClientConnectionManager(AbstractHttpClient.java:309)

at org.apache.http.impl.client.AbstractHttpClient.getConnectionManager(AbstractHttpClient.java:466)

at org.apache.http.impl.client.AbstractHttpClient.createHttpContext(AbstractHttpClient.java:286)

at
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:851)

at
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)

at
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:784)

Answer 1:

貌似发送的数据没有被正确引用。最终的结果应该是

{'email_address':'email@aol.com','password':'password'}

尝试代码更改为

tokenRequest = StringEntity('{"session", {"email_address":"email@aol.com","password":"password"}}');

Answer 2:

urlread2竟然是一个更好的解决方案。此代码的工作：

tokenRequest = '{ "session" : { "email_address": "email@aol.com", "password": "password" } }';
header = http_createHeader('Content-Type','application/json');
token = urlread2('http://localhost:3000/signin.json','POST',tokenRequest,header);